Abstract

Since multidrug resistance (MDR) has become a major issue in the treatment of pathogenic bacterial infections, the scientific community has developed an interest in phenolic compound due to their wide range of possible applications. During the period from October to November of 2022 Prunus domestica(Plum) and Solanum melongena (Eggplant) was purchased from the Iraqi local market. P. domestica fruit was peeled and kept fresh by freezing, while Solanum melongena plant was dried and ground . Crude extract from Prunus domestica and Solanum melongena peels by a Soxhlet device . Anthocyanins dye was characterized by Gas Chromatography Mass Spectrometer (GC-MS), the most Prunus domestica and Solanum melongena peels extract compounds have been shown to have different biological activities. The microorganisms used in antibacterial assays are Stаphylococcus аureus, Serratia marcescens, Proteus mirabilis, Psеudomonas аerugienosa, Bаcillus cеreus and Candida albicans. These cultures were obtained from Laboratory of Biotechnology Division, Department of Applied Sciences, University of Technology, Iraq. The isolated microorganisms were rediagnosed in traditional way by VITEK 2 system ,then used as antimicrobial activity. Crude extract from Prunus domestica and Solanum melongena peels suppressed the development of every isolate, at concentrations (25, 50, and 75) μg/mL, except Proteus mirabilis was inhibited at concentrations (50 and 75) μg/mL for Solanum melongena . The results detected that Prunus domestica and Solanum melongena peels had more effective than other antimicrobial agents at inhibiting the development of microorganisms especially for Candida albicans which was shown inhibited at all concentrations, antibiotic against of fungi there was no inhibition zone. All of the isolates conducted an antibiotic susceptibility test, and it was shown that some of the isolates had antibiotic resistance. The 1,1-Diphenyl-2-picrylhydrazyl (DPPH) method was used to identify the antioxidant activity of crud anthocyanin dye. The results showed that the antioxidant activity of the dye increased with an increase in the concentrations. Anticancer activity had been shown The ability of Prunus domestica and Solanum melongena peels to suppress the growth of cancer cell lines was used to evaluate their anticancer properties. The findings demonstrated the highly considerable cytotoxic action of crud extract against MCF-7 cell line at concentrations ranging 6.25, 12.5, 25, 50, 100,and 200 µg/mL. The inhibitory concentration value (IC50) of Prunus domestica peels was 34.92 μg/mL. While the inhibitory concentration value (IC50) of from Solanum melongena peels was 37.23 μg/mL. In vivo study on mice were done to investigate the effects of oral administration of crude anthocyanin dye from Prunus domestica and Solanum melongena peels on liver function, kidney function, and blood sugar levels in mice. Mice were divided into a control group and treatment groups with Prunus domestica and Solanum melongena peels that received 100 μg/kg/day of the respective crude extract for one week, two weeks, three weeks, four weeks. Liver function was assessed by measuring serum levels of glutamic oxaloacetic transaminase (GOT), glutamic pyruvic transaminase (GPT), and alkaline phosphatase (ALP). Kidney function was evaluated by measuring serum urea and Creatinine levels. Random blood sugar (RBS) levels were also measured. The results showed that administration of Prunus domestica and Solanum melongena peels led to significant improvements in liver and kidney function markers as well as reduced blood sugar levels compared to the control group. The beneficial effects were more pronounced with longer durations of Prunus domestica and Solanum melongena peels administration. These findings suggest that these natural plant-derived crude extract may have therapeutic potential for antimicrobial, antioxidant, anticancer activity, managing liver disease, kidney dysfunction, and blood sugar dysregulation.

Abstract

The present study included 155 clinical samples were collected through the period extending from September to December 2022. The samples were collected from both genders males and females,different ages patients from different clinical sources (Burn, Urine, Wound, Sputum, Ear, and Blood). Samples were collected from three hospitals in Baghdad including Al-Yarmouk Teaching Hospital, AL-Mahmmodiya Hospital, and Child’s Central Teaching Hospital. Depending on the characteristic examination, morphological of the colonies phenotypic and microscopic when grown in differential and selective media, as well as biochemical tests to diagnose isolates 55 isolates were identified as P. aeruginosa, and then confirmed by VITEK 2 compact system. Molecular diagnosis of P.aeruginosa was performed by extracting DNA for 25 isolates and amplified by polymerase chain reaction to detect 16s-rRNA. Molecular Identification the results showed that all samples are P. aeruginosa. the percentage of isolates according to clinical sources were burn swabs n=19, urine culture n=12, wound swabs n=6, sputum n=11, ear swabs n=5 and blood n=3 and these samples were showed significant differences (P≤0.01). The biochemical tests including the Oxidase test and catalase test the result of its 55. Kirby-Bauer method was used for all the bacterial isolates to find out the antibiotic susceptibility test for eight different antimicrobial agents belonging to different classes levofloxacin (LEV), imipenem (IPM), meropenem (MEM), amikacin (AK),asteronam(ATM), ciprofloxacin (CIP), piperacillin(PRL), cefepime(FEP). The current results show of isolates were resistant to PRL, AK, and resistant to FEP, while were sensitive to CIP, IMP, and sensitive to LEVO. Combined disk Synergy Test, the metallo-β-lactamases (MBL) phenotype of imipenem-resistant isolates was detected. PCR was performed to amplify gene MBL. The antibiotic resistance of MBL-producing isolates (VIM, SPM, GIM) of imipenem-resistant P.aeruginosa was compared with that of non-MBL-producing isolates. A standard and the imipenem and EDTA (ethylene diamine tetra acetic acid) combination The disc test and the polymerase chain reaction(PCR) were then used to detect MβL. 20 of the 55 P. aeruginosa strains tested positive for imipenem resistance. The imipenem EDTA combined disc test showed positive results for 17 of the 20 imipenem-resistant bacteria tested and 20 of these microorganisms carried MβL genes. Molecular diagnosis of P. aeruginosa was performed by extraction of DNA for 25 isolates and amplified by a polymerase chain reaction to detect VIM, IMP, SPM, and GIM resistance genes. VIM, SPM, GIM and IMP were detected by conventional PCR, and the results revealed that (20/25) of isolates had these genes present. Extraction of RNA was performed for gene expression. Analysis of gene expression by using RT-PCR This study employed twenty-Five bacterial isolates; three was sensitive, tow was moderate, the other 20 were resistant, and gene expression was assessed for each. In order to calculate the delta Ct, the gene expression of each isolate was assessed using duplicates, the average for each isolate was taken, and the isolate that was sensitive (used as a control) to Imipenem antibiotic was used as a calibrator. Results suggest that other undiscovered factors or pathways likely contribute to the upregulation of VIM and downregulation of GIM,SPM, IMP not founed in all isolates. The upregulation of efflux pumps, decreased outer membrane permeability, and acquired Metallo-beta-lactamases (MBL) are introduced as the main factors leading to carbapenem resistance These genes that are important for resistance in P. aeruginosa are induced by chromosomal changes that modify membrane permeability efflux pump overexpression. additionally shows that the MβL strains are multi-drug resistant; as a result, effort should now be directed toward reducing the threat to the public's health by preventing the spread of these isolates by tight infection control measures and the reduction of the danger to public health.

Abstract

Diabetic foot ulcers are one of the most common public health issues worldwide, putting a social strain on those who suffer from them. This study included one-hundred fifty-two swabs from diabetic foot ulcer patients with age (36-82) years, during the period from 5 October 2021 to 30 January 2022, from different private clinics in and around Baghdad and Medical City Hospital in Baghdad/Iraq. The results of collected samples revealed that the frequency of males 85 (55.92%) more than females 67 (44.07%), and the age group of (51-68) years was more ages affected by diabetic foot ulcer at 48.68% percentage. In addition, the majority of them were with Type 2 Diabetes mellitus. From these clinical specimens, fifty-five isolates of Staphylococcus aureus, thirty-five isolates of Acinetobacter baumannii, thirty isolates of Serratia marcescens bacteria and ten isolates of Candida albicans were isolated from diabetic foot ulcer. The isolates were diagnosed morphologically, microscopically, and biochemical tests, then the diagnosis was confirmed using the VITEK2 system. In the present study, the antibiotic, Ciprofloxacin (CIP), was loaded onto silver nanoparticles (AgNPs), which were synthesized via the chemical reduction method, to improve the treatment schemes as an alternative solution against diabetic foot bacteria. For the best results, it was proposed a method that used Polyethylene glycol-400(PEG) to prepare coated AgNPs-PEG with enhanced stability, and through the intermediary of the Polyethylene glycol as a linker between Ciprofloxacin and silver nanoparticles to produce the novel nano-conjugates AgNPs-PEG-CIP, as the final formulation of the intended nanomedicine. The physico-chemical properties of size, shapes, size distribution, antibacterial, antioxidant, and anti-biofilm properties of the bare AgNPs, AgNPs-PEG, AgNPs-CIP, and AgNPs-PEG-CIP were investigated and compared amongst them to understand the roles and reactivity, and biological actions of these different nano-entities. The prepared silver nanoparticles and their conjugates ,with Polyethylene glycol and Ciprofloxacin were characterized by color visualization, ultraviolet-visible (UV/vis) spectrophotometer, Fourier Transform Infrared spectroscopy (FTIR), X-ray diffraction (XRD), Field Emission Scanning Electron Microscope (FE-SEM) with Energy-dispersive X-ray spectroscopy (EDX), Transmission Electron Microscopy (TEM), zeta potential analysis and dynamic light scattering (DLS). The UV-Vis spectroscopy examination has shown the highest absorbance at 438nm, 426nm, 477nm, and 454nm for AgNPs and AgNPs-PEG, AgNPs-CIP, and AgNPsPEG-CIP, respectively. Which indicates of the creation of these nanoparticles. the crystalline structure of silver nanoparticles and their conjugates has been revealed by XRD. FE-SEM has shown the morphology of silver nanoparticles which have a spherical shape with a size range of 32.08 to 43.28 nm, and their conjugates have spherical to oval shapes, with a size ranging from 41.08 to 82.49 nm for AgNPs-PEG and 63.44 to 98.28 nm for AgNPs-PEG-CIP. EDX shows that the weight percentage of silver atoms in AgNPs, AgNPs-PEG, and AgNPs-PEG-CIP liquid samples was 60.4%, 28.4%, and 15.0%, respectively. TEM images demonstrated that silver nanoparticles and their conjugates have spherical to oval shapes, and the histogram of size distribution shows the mean at 33.48nm, 47.35 nm, and 59.78nm for AgNPs, AgNPs-PEG, and AgNPs-PEG-CIP, respectively. The results of The Zeta potential of silver nanoparticles and their conjugates were negative values and moderately stable for AgNPs at -26.84mV and AgNPs-PEG-CIP at -28.46 mV, and good stable for AgNPs-PEG at -37.66mV. The particles size distribution of silver nanoparticles and their conjugates distributed in colloidal suspensions was 57.9 nm, 72.63nm, and 97.31 nm for AgNPs, AgNPs-PEG, and AgNPs-PEG-CIP, confirming the formation of these particles at the nano-size. Silver nanoparticles and silver nitrate were tested for inhibition the growth of microbial isolates at concentrations (12.5, 25, 50, 100)μgmL-1 . The results showed that silver nanoparticles inhibited the bacterial growth more than silver nitrate. The finding revealed that Staphylococcus aureus was more susceptible to silver nitrate and silver nanoparticles than other types of pathogenic bacteria studied. The synergistic effect of AgNPs-PEG, AgNPs-CIP, and AgNPs-PEG-CIP conjugates against diabetic foot bacterial isolates were examined using well diffusion method, the results showed an increase in the diameters of the inhibition zone compared to free Ciprofloxacin and silver nanoparticles. However, the final nano-conjugates AgNPs-PEG-CIP showed an excellent antibacterial effect against Staphylococcus aureus, Acinetobacter baumannii, and Serratia marcescens at 41mm, 35mm, and 39mm, respectively. The Minimum Inhibitory Concentration (MIC) of silver nanoparticles and their conjugates was measured, and the results showed that the MIC of bare and PEG-AgNPs for Staphylococcus aureus was less than other bacteria.AgNPs-PEG-CIP nano-conjugates showed high antibacterial activity with a significant decrease in the MIC for all tested bacteria. The Minimum Bactericidal Concentration (MBC) showed that AgNPs-PEG-CIP had a strongest effect in inhibiting bacterial growth and the values for Staphylococcus aureus, Acinetobacter baumannii, and Serratia marcescens were (25, 50, 12.5 )g mL-1 , respectively. The effect of nanoparticles on biofilm inhibition was quantified using tubes method, and the effect of AgNPs-PEG-CIP was the best. Based on growth curve determination, the effect of silver nanoparticles and their conjugates on the growth of microbial diabetic foot isolates was evaluated. The results showed that Staphylococcus aureus and Serratia marcescens growth were inhibited at 90 minutes with bare and coated AgNPs, and at 60minutes with AgNPs-CIP and AgNPs-PEG-CIP. At 90minutes, AgNPs and their conjugates were inhibited Acinetobacter baumannii. The antioxidant potentials of AgNPs and their conjugates, tested via their 1,1-diphenyl-2-picryl-hydrazyl (DPPH) scavenging ability, AgNPs were found to be 40.45%, 50.98%, 53.66%, 63.67%, 73.64%, at concentrations (6.25, 12.5, 25, 50, 100) μgmL-1 , respectively. And the antioxidant activity of AgNPs-CIP and AgNPS-PEG was at 76.24%, and 81.44%, respectively. While AgNPs-PEG-CIP had the highest value at 86.34%. Overall, according to the results obtained in the present study, the final nanoconjugates, AgNPs-PEG-CIP, showed the highest antibacterial, antibiofilm, and antioxidant activity against tested bacteria. The impact of silver nanoparticles and their conjugates on the chromosomal pattern has also been studied.

Abstract

Polymethyl methacrylate (PMMA) is the most commonly used denture because of its several advantages, including color matching, low cost, tasteless, non-toxic, and simplicity of repair after broken. Certain microorganisms adhering to PMMA dentures have been a problem for a long time due to PMMA's surface roughness and porosity. This study reinforced polymethyl methacrylate (PMMA) by 1%, 2%, 3%, and 10 wt. % of each of the following: Zinc oxide nanoparticles (ZnO NPs), zirconium oxide nanoparticles (ZrO2 NPs), Titanium dioxide nanoparticles (TiO2 NPs), tri-calcium phosphate nanoparticles (TCP NPs), and 3 wt.% as a combination between ZrO2 and TiO2 and another combination between ZnO NPs and TCP NPs in equal ratios. Despite the numerous benefits of the resin PMMA base, it has various drawbacks that we need to address using nanoparticles, such as flexural strength, porosity, and rough surfaces that provide an excellent environment for dangerous bacteria and fungi to stick to grow. Eighteen composite samples and control samples were created. These samples were made to determine the ideal weight ratio of nanoparticles in the PMMA composite material with biological compatibility, low toxicity, and acceptable mechanical and physical qualities. In this research, we evaluated the ratio of apparent porosity, hemolysis tests and Prothrombin time (PT), international normalized ratio (INR), and bacterial adhesion. According to the testing results, the best nanoparticle-based samples were those that contained only 1 and 2 wt.% of nanoparticles, which reduced bacterial adhesion ( Klebsiella pneumonia and Staphylococcus aureus) on the surface of the samples and were not toxic at the same time, and (ZnO+TCP) 3 II wt.% showed significant results in the reduction of zinc toxicities due to mixing with TCP NPs. In terms of hardness, hemolysis, and porosity, TiO2 NPs composites showed the best results. Regarding bacterial adhesion, ZrO2 NPs composites showed the best results, and in PT and INR tests, ZnO NPs composites showed the best results.

Abstract

TPolycyclic aromatic hydrocarbons are considered slow decomposition pollutants in nature, and therefore they are treated in several ways and removed from the environment. The most important of these methods is biological treatment by microorganisms that are already present in the areas of presence of these pollutants. Soil samples were collected from oilcontaminated areas of Al-Dora and Sheikh Omar refinery area with a depth of (5-10) cm and a series of dilutions from (10-1 ) to (10-8 ) were made for them, then 0.1 ml of each dilution was cultured on nutrient agar. Twenty bacterial colonies were isolated and then cultured on solid nutrient media inside wells of mineral salt media agar with hydrocarbons (naphthalene, phenanthrene, anthracene) as the sole source of carbon and energy. They were incubated at a temperature of 37°C for 7 days, then the growth zone was observed on 10 dishes. The 10 isolates grown on liquid culture media were incubated in the shaker incubator at a temperature of 37°C and 150 rpm for 7 days. Then it was examined by HPLC High-performance liquid chromatography to know the percentage of bacteria degradation of these compounds. After this, the most efficient bacterial isolates were diagnosed with the VITEK 2 device. Serratia ficaria and Bacillus subtilis showed the highest decomposition rates for PAHs compounds (naphthalene, phenanthrene and anthracene). Serratia ficaria degraded anthracene by 86.6%, and the degradation of naphthalene was 85.16%, and the phenanthrene was 91.36% in contrast the Bacillus subtilis degraded naphthalene by 93.36% and degraded phenanthrene by 91.72%.

Abstract

In the present investigation, galangin and β-cyclodextrin (GAL/β-CD) inclusion complexes were prepared by the nanoprecipitation technique. GAL/β-CD stayed water soluble after 24 hours at 25°C. Different methods of characterization such as UV-Vis spectroscopy, Analysis of fourier transforms in infrared spectrum (FTIR), X- ray Diffraction technique (XRD), zeta potential analysis and particle size, Field emission scanning electron microscope (FESEM), transmission electron microscope (TEM) and atomic force microscope (AFM) studies were performed and confirmed the synthesis of nanoparticles. Where the UV-Vis spectroscopy analysis for GAL/β-CD showed high absorbance at 360 nm, FTIR analyses were conducted to evaluate the element and functioning groups of GAL/β-CD. XRD, FESEM, TEM and AFM studies confirmed the existences of GAL/β-CD. These results enhanced GAL/β-CD solubility also showed that the manufactured particles had a thin layer, a spherical form, and the diameter ranging between 13–32 nm. Zeta Potential was - 63.14 mV and mobility was 1.25 V/cm with the particle size 23.9 nm and PDI value 0.387. Antioxidant activity by DPPH radical scavenging assay was used in vitro to demonstrate concentration-dependent scavenging action in the 2-50 µg mL-1 range, with the highest level of activity possible of GAL/β-CD was 92.00% at 50 µg mL-1 . In galangin, a decrease of level of hydrogen peroxide 85.00% was observed. The ferric thiocyanate on lipoperoxidation method was clarified by using galangin and GAL/β-CD and demonstrated concentration-dependent suppress lipid peroxidation in the 2-50 µg mL-1 range, at 50 µg mL-1 , the highest level of activity was 70.00%. In galangin decrease level of activity to 60.00% was observed. Xanthine oxidase activity using uric acid was given. The galangin and GAL/β-CD inhibited xanthine oxidase activity in a concentration-dependent manner in the 2-50 µg mL-1 range, at 50 µg mL-1 , the highest level of activity was 90.00 %. While galangin showed 82.00 % decrease. Serum stability in the presence of GAL/β-CD was investigated. The results demonstrates a drastically decreased PS value for galangin following its initial combination with 10% FBS (13591 vs. 5003 nm). In contrast, no significant changes in PS or PDI values of GAL/β-CD were seen throughout time, suggesting that they were stable in serum for 6 hours. The PS of GAL/β-CD ranged from 30 to 63.9 nm. The hemolytic toxicity of GAL/β-CD was investigated, the results showed that modified GAL/β-CD caused less hemolytic toxicity of RBCs (less than 5 %) in respect to the comparable amounts of galangin. The cytotoxicity effect of GAL/β-CD evaluated with the cell line MCF-7 utilizing the MTT assay. The outcomes revealed a concentration-dependent cytotoxicity. The highest cytotoxicity (83.33%) was observed following therapy by 50 µg mL-1 of GAL/β-CD, whereas the cytotoxicity was 11.67% at 3.1 µg mL-1 . Galangin caused less cytotoxicity values of 64.33% and 6.66%, respectively. Crystal violet assay was carried, the GAL/β-CD award forceful cytotoxicity opposite MCF-7 cells. The apoptosis was studied in both cell lines after treatment with GAL/β-CD through types of assessments, which are by utilizing acridine orange & ethidium bromide, mitochondrial activity with Rh123 and ELISA assay with caspase-3 protein detection. The results revealed that GAL/β-CD only caused cell death mediated apoptosis, which was discovered by the above-mentioned assessments and increased nuclear morphological alterations The in-vivo study of the toxicity in animal model was measured by the following parameters, hematological parameter, liver enzymes such as AST/GOT, ALP, and ALT/GPT were showed no significant effect (150,163 and 53 IU/L), (126, 145 and 48 IU/L) in both dosage 20 mg kg-1 and 640 mg kg-1 respectively in comparison with the healthy control (158, 147 and 56 IU/L) respectively, Kidney functions including blood urea, serum creatinine and uric acid showed no significant effect (47, 0.2 and 5 mg/dL), (41, 0.1 and 2 mg/dL) in both dosage 20 mg kg-1 and 640 mg kg-1 respectively in comparison with the healthy control (45, 0.1 and 3 mg/dL) respectively. To learn more about the consequences of GAL/β-CD at two dosages for immunological responses in the lymph organs, the relative weight and indices of organs mice for the spleen and thymus of mice were calculated .The values of spleen index when mice were given 20 and 640 mg kg-1 were 0.86± 0.09 and 0.87±0.08, respectivly, whereas those for the thymus were 0.82±0.06 and 0.82±0.09, respectivly. It can be seen that the values of the indices of the spleen and thymus had no significant differences among the studied groups. And histopathological were estimated after 14 days of oral dose with two doses 20 mg kg−1 and 640 mg kg−1 . Our results demonstrate that GAL/β-CD had no side effects according to high dose 640 mg Kg−1.

Abstract

This study was conducted on Iraqi patients with MS (n=100) and was divided into two groups; newly diagnosed (n=42), and patients with ongoing treatments (n=58). These groups were compared to apparently healthy subjects (n=55). Serum levels of myelin basic protein (MBP), Eotaxin-1, IL23, IL -27, IL- 9, and IL -37 were measured by a human ELISA reader, Enzyme-linked immune sorbent assay research kit (type sandwich ELISA,). Nonetheless, liver-functioning enzymes such (alkaline phosphate, aspartate aminotransferase, and alanine aminotransferase), D-bill, T-bill and D3 were assayed on an automated biochemical analyzer SIEMENS Healthineers. It was necessary to draw 3 ml of whole blood straight into an EDTA-containing tube from the venous blood. Hematological parameters (hemoglobin concentration Hb, packed cell volume PCV, white blood cells, red blood cells and platelet count where determined by the whole blood were immediately analyzed by using the fully automated analyzer Sysmex Xn 1000, also studies for gene polymorphism of PDCD1 and PDLCD1 genes and the frequency of two SNPs (rs2227981 and rs2282055) were measured by Realtime PCR by used HRM. The study results of Myelin basic protein (MBP), Eotaxin-1, IL-23, IL -27, and alkaline phosphate were significantly higher in all MS patient groups p≤0.05. The results of genotypic frequencies of MS patients were In PD1 gene polymorphism rs2227981 GG was a higher risk of MS than the wild-type PD1 gene polymorphism rs2227981 AA with (OR= 12.8 (0.2-5.9 p=0.001), The PD1 gene polymorphism rs2227981 AG genotype has the second risk of MS after PD1 gene polymorphism rs2227981 GG with 3.92 fold high risk than the wild type AA (OR =3.92 (1.8-8.2) p=0.0003). The results of genotypic frequencies of MS patients were In PDL1 gene polymorphism rs2282055 TG was a higher risk of MS than the wild-type PDL1 gene polymorphism rs2282055 TT with (OR= 4.6 (2.0-10.7) p=0.003), the PD1 gene polymorphism rs2282055 GG genotype has the II second risk of MS after PDL1 gene polymorphism rs2282055 TG with 2.9 fold high risk than the wild type TT (OR =2.9 (0.9-8.7) p=0.05). In conclusion, according to this study, the results conclude that myelin basic protein (MBP), eotaxin-1, IL-23, 27, and alkaline phosphate can be used as diagnostic markers for multiple sclerosis.

Abstract

Glioblastoma multiforme (GBM) is the most frequent and severe kind of major malignant tumor of the central nervous system (CNS) that affects adults. Despite advances in surgery, radiation, and chemotherapy, individuals with GBM still have a poor prognosis. The chemotherapy medication Temozolomide (TMZ) is most typically given orally following surgical excision of these malignancies. Because TMZ is an unstable chemical with a short half-life and dose-limiting adverse effects, it is not recommended for long-term usage. As a result, novel approaches, such as using biomaterials to preserve pharmaceuticals and improve the delivery of bioactive medications to cancer cells, are desperately needed. The copolymer Poly (D, Llactide-co-glycolide) (PLGA) is a -hydroxy acid-derived polyester that has been widely employed for the creation of biodegradable microparticles due to its inert characteristics, high biocompatibility, and versatility. The human brain has been demonstrated to be biocompatible with PLGA. For the treatment of glioblastoma, PLGA has been frequently employed in the manufacture of TMZ-loaded particles by the method of emulsion solvent evaporation. The synthesis of Nanoparticles (TMZ-PLGANPs) was characterized using a variety of approaches, including UV-VIS spectroscopy, Zeta Potential Analysis and Particle Size, Fourier Transforms Infrared Spectroscopy (FTIR), Field Emission Scanning Electron Microscopy (FESEM), Transmission Electron Microscopy (TEM), and X-Ray Diffraction (XRD) studies were performed and proven the creation of nanoparticles. Where the UV-Vis spectroscopy analysis for Temozolomide indicated that the top peak for it could be seen at 328 nm when the top peak for PLGANP could be seen at 252 nm, TMZ-PLGANPs showed a top peak at 265 nm, Zeta Potential was -29.25 mV with the PDI value of 0.31 and mobility was -2.29 V/cm. FTIR was utilized to determine which functional groups are present n the TMZ, and TMZ-PLGANPs, as well as to estimate the chemical stability of the encapsulated substances within the nanoparticles. The presence of modified Temozolomide nanoparticles was proven by XRD, FESEM, and TEM studies, which detect that the prepared particles were spherical and had a smooth surface with a diameter ranging between 60-100 nm. Combination Therapy strives to improve each other's therapeutic efficiency while lowering toxicity, side effects, and overcoming cancer cell resistance, which acts as a barrier to cancer treatment at low concentrations. Thus, against the human glioblastoma cancer cell line (AMGM5), the current study offered a novel combination treatment consisting of TMZ-PLGANPs and oncolytic Newcastle disease virus (NDV). The AMHA1 attenuated strain of NDV was cultured in pathogen-free chicken embryos, the Red Blood Cell (RBCs) conglomerate HA has been tested, and the virus was tittered in Vero-slammed cells to estimate the infective dosage TCID50. The invitro cytotoxic effects of NDV, TMZ, and TMZ-PLGANPs against human cancer cells (AMGM5) and the normal cell line Rat Embryo Fibroblast (REF) were investigated by using an MTT assay. The results showed a multiplicity of infection (MOI) and concentration-dependent cytotoxicity, the inhibitory concentrations (IC50) were found to (0.1, 0.5, and 1 MOI) for NDV, (1.56, 3.125, and 6.25 μgmL1 ) for TMZ, and (6.25, 12.5, and 25 μgmL-1 ) for TMZ-PLGANPs against (AMGM5) and low cytotoxicity on (REF) cells at 72 h. Using the Chou-Talalay analytical technique, the MTT viability test was utilized to examine any potential synergism. The in vitro research demonstrated that the combination therapy of (NDV+TMZ) and (NDV+TMZ-PLGANPs) had synergistic enhanced anticancer activity on the AMGM5 cancer cell line tested, and the results of this trial showed that the combination therapy (NDV+TMZ-PLGANPs) produced a higher GI percent than either therapy alone. Using the stain Crystal violet to assess the effectiveness of formation of cancerous colonies for each treatment alone and in combination on the AMGM5 cells at IC50 concentration for 72h. and the results indicated that combination therapy (NDV+TMZ-PLGANPs) decreased colonies number of AMGM5 cells more than each therapy alone. The morphological changes in AMGM5 cells were seen using a phase-contrast inverted microscope and crystal violet stain with IC50 concentrations of each treatment and the combination therapy. The findings revealed granulation and cell shrinkage, finally leading to the separation and floating of infected cells in the culture fluid. In vitro study also included stimulation of programmed cell death (apoptosis) in exposed AMGM5 cancer cells with suitable doses for NDV (0.5 MOI). TMZ (3.125 μgmL-1 ), TMZ-PLGANPs (12.5μgmL1), NDV+TMZ (0.5+3.125), and NDV+TMZ-PLGANPs (0.5+12.5) for 72h. by using (Acridine Orange and propidium iodide double stain). We found that the combination therapy of (NDV+TMZ-PLGANPs) stimulated apoptosis more than the virus or the drug alone. This work adds to the theoretical underpinning for the use of TMZ and NDV in combination treatment for GBM patients.

Abstract

The severe acute respiratory syndrome corona virus is the causative agent of the ongoing global pandemic of corona virus illness 2019 (COVID-19) (SARS-CoV-2). There have been a number of gene mutations that have appeared after the old version of the Wuhan strain (19A), and they are as follows: Alpha/UK on September, 2020; Beta/South Africa on September, 2020; Gamma/Brazil on December, 2020; Delta/India on December, 2020; Omicron/South Africa and Botswana on November, 2021). The first positive case in Iraq was discovered on February 26, 2020, in a patient from the governorate of Najaf, and was reported by the Central Public Health Laboratory (CPHL) in Baghdad. Since then, investigations and positive cases for this virus and its variants have been reported throughout Iraq. The study aimed to detect the dominant variant in Iraq and characterization of the genomic sequences to determine the relationship of the severity of the disease with the variant of infected virus concern to biological parameters like; the gender, age, smoking, blood groups of patients, estimate the level of some liver enzymes, plasma proteins during infection, and determine some immunological parameters (WBCs, Lymphocytes, Il-10, Il- 18 IFN-γ and TNF- α) during infection. Nasopharyngeal swabs and venous blood samples were collected from Iraqi patients (100 samples), (55) males and (45) females from 1st of October 2020 to 1st of February 2021 from Al-Kindy Hospital / Baghdad, and Central Public Health Laboratory (CPHL) / Baghdad of different age groups. Patients were classified according to the severity of disease to five groups; asymptomatic, mild, moderate, severe and deceased according to the recommendations of the World Health Organization (WHO). The virus was detected by real-time quantitative polymerase chain reaction. In patients aged between 15 and 90 years, there was a strong positive linear relationship (R2=0.91) between increasing age and increasing disease severity depending on the severity of the disease, a little statistically significant difference in the number of males and females infected with SARS-CoV-2, males were found to be more susceptible to infection than females in certain situations. Moreover, people with blood group (O) were more susceptible to infection because type (O) is more widely spread in the Middle East population than the other blood types, while type (B) revealed more resistance to infection, furthermore, smokers and nonsmokers were randomly distributed among different disease severities and thus, there was statistically non-significant association between smoking status and COVID-19 severity. The white blood cell counts (WBCs) showed irregular fluctuations among polynomial relationships with different disease severities; they were highest in moderate cases and lowest in mild cases, but the overall difference was not statistically significant. Lymphocyte counts showed a statistically significant inverse linear correlation with disease severity; the counts decreased progressively from asymptomatic and mild cases towards more severe forms. The decrease was most significant in severe cases and to a lesser extent in moderate cases. Moreover, interleukins (IL-10, IL-18, and TNF- α) were determined by using the Enzyme Linked Immunoassay Sorbent Assay (ELISA) technique. The results of all tested interleukins showed a statistically significant difference between groups of different disease severity. IL-10 was highest in mild and asymptomatic cases and showed a progressive decrease with increasing disease severity. The linear egression showed a strong inverse relation (R2 = 0.90) with disease severity, while Il-18 showed polynomial regression (R2 = 0.85) with fluctuating levels.The greatest drop was seen in severe and deceased cases in comparison to the highest levels in mild cases. TNF- α levels were also subjected to polynomial regression (R2 = 0.64). Initially increasing from asymptomatic to mild cases, its levels dropped with increasing disease severity. Three kinds of plasma proteins showed statistically significant differences, especially between the deceased groups. CRP levels showed a strong exponential relation (R2 = 0.98) with disease severity. Increased severity was associated with a progressive increase in CRP levels. D-dimer levels were significantly increased in deceased cases in comparison to the low levels in mild and moderate cases. They showed strong polynomial regression (R2 = 0.95) with disease severity, first decreasing from asymptomatic to its lowest level in moderate cases before increasing again to its highest levels in deceased cases. Serum ferritin levels showed a strong polynomial relation (R2 = 0.79), with fluctuation levels in different disease severities. Statistically significant levels were seen in moderate, severe, and deceased cases. On the other hand, potassium levels did not differ significantly in all groups examined. Furthermore, three liver enzymes, alanine aminotransferase (ALT) and aspartate aminotransferase (AST), were examined and differed statistically significantly in all groups, and both enzymes had strong polynomial relationships with disease severity, gradually increasing from asymptomatic to mild to moderate, and decreasing slightly in severe cases. Before, there was another sharp increase in mortality, while the LDH level showed a statistically significant difference, especially in severe cases, and there was a strong positive linear relationship (R = 0.90) between LDH and increasing disease severity. The whole genetic sequence of five samples was determined during this study, three of which belonged to the original Wuhan strain (A19), which was more virulent at that time and was among the patient groups (moderate, severe, deceased) and led to the patients' being admitted to isolation hospitals and Intensive Care Units (ICU), while the other two isolates belonged to the United Kingdom (UK Alpha V1) strain, which was in the (mild and asymptomatic) groups. The United Kingdom (UK Alpha V1) strain was characterized by its rapid spread, as it first appeared in September 2020 in England, which corresponds to the time of sample collection in this study in early 2021; it was also less virulent and spread more quickly than the Wuhan strain, which explains its presence among the two groups mentioned above.

Abstract

During the period from October to December of 2020, fifty isolates of Candida albicans, and ten isolates for each of Staphylococcus haemolyticus, and Klebsiella pneumoniae were collected from urine samples taken from children patients at Al-Elweya Children's Teaching hospital in Baghdad/ Iraq. The isolates were diagnosed by conventional diagnosis methods, and then the diagnosis was confirmed using the VITEK2 system. The effectiveness of Candida albicans yeast in the mycosynthesis of silver nanoparticles was tested by mixing the Candida albicans supernatant with silver nitrate solution in concentration 2 mM. The mycosynthesized silver nanoparticles were identified by color visualization, ultraviolet-visible (UV) spectroscopy device, X-Ray Diffraction (XRD), Energy Dispersive Analysis of X-ray (EDX), Field emission Scanning electron microscope (FESEM), Zeta potential analysis, Raman analysis, and Fourier transform infrared spectroscopy (FTIR). The UV-Vis spectroscopy examination has shown the highest absorbance (λmax) at the wavelength of 429 nanometers which indicator of the creation of silver nanoparticle, X-Ray Diffraction (XRD) has shown the crystalline structure of silver nanoparticles, Energy Dispersive Analysis of X-ray (EDX) shows that the weight percentage of silver atoms in the sample was 82.4%, Field emission Scanning electron microscope (FESEM) has shown the morphology of silver nanoparticles is spherical, and its size is 40.19 nanometer. Zeta potential analysis has shown silver nanoparticles are middling stable in the solution, and the zeta potential of silver nanoparticles mycosynthesised by Candida albicans is (− 23.02) mV. Silver nanoparticles and silver nitrate inhibited the growth of Klebsiella pneumoniae and Staphylococcus haemolyticus bacteria at concentrations (12.5, 25, 50, 100) μg/ml. The results showed that silver nanoparticles had a more inhibitory effect on bacterial growth than silver nitrate. The results revealed that Staphylococcus haemolyticus was more susceptible to silver nitrate and silver nanoparticles than Klebsiella pneumoniae. The combination of silver nanoparticles, Candida albicans supernatant, and silver nitrate with antibiotics was also examined for its synergistic effect. After being treated with silver nanoparticles at a concentration of 100 µg/ml, most of the results of studying the synergistic effect of silver nanoparticles on the growth of pathogenic bacteria isolates showed an increase in the diameters of the inhibition zone for antibiotics, with Gram-positive Staphylococcus haemolyticus being the bacteria most affected. The Minimum Inhibitory Concentration (MIC) and of silver nanoparticles were also measured for Klebsiella pneumoniae and Staphylococcus haemolyticus was (50, 25) μg/ml, respectively. While Minimum Bactericidal Concentration (MBC) for Klebsiella pneumoniae and Staphylococcus haemolyticus was (100, 50) μg/ml, respectively The cytotoxic effect of silver nanoparticles against a human colon cancer cell line (HT-29) using the MTT assay showed the presence of toxic action against the cells, and no cytotoxic effect was observed on the untreated human colon cancer cell line (HT-29) with silver nanoparticles. The antioxidant activity of silver nanoparticles by using DPPH assay has shown 17.0%, 29.3%, 48.3%, 67.6%, 83.6% at concentrations (6.25, 12.5, 25, 50, 100) µg/ml, respectively. The impact of silver nanoparticles on the chromosomal pattern has also been studied.

Abstract

Cancer occurs when changes called mutations take place in genes that regulate cell growth. The mutations let the cells divide and multiply in an uncontrolled way. The aim of this study was to analyze function and structures of the IFN-y by using bioinformaticsmethods. IFN-γ, or type II interferon, is a cytokine that is critical for innate and adaptive immunity against viral, some bacterial and protozoan infections. IFN-γ is an important activator of macrophages and inducer of major histocompatibility complex class II molecule expression. Blood and serum samples were collected from Al - Amal National Hospital for Cancer Treatment in Baghdad/Iraq. The total number of samples in this study was 70 for patients suffering from breast cancer beside to 30 of healthy subjects as control samples. The collected serum was used for measuring the concentration of the IFN-γ protein by using ELISA technique. Total extracted DNA was obtained from whole blood of the studied samples. Polymerase chain reaction (PCR) technique was used to amplify the IFN-γ gene regions by using specific primers. The obtained amplicon were sequenced with automated sequencer. Bioinformatics tools and methods were used for analyzing the function and predicting the structures of the IFN-y protein. The results revealed a significant increase in the mean value of serum IFN-γ protein in breast cancer patients in comparison with the normal Iraqi human (healthy control subjects) at (p˂0.05). BLAST program results showed mutations in intron and 4 exon of IFN-γ gene. These mutations were substitution and missense in patients. EMBOSS program was used to translate the nucleotide sequence of IFN-γ gene in all samples to the amino acids.Then BLASTx program was used to transalate the nucleotide sequence. The physiochemical properties of the primary structure of the IFN-γ protein were computed by using ProtParam program which showed the effect of mutations on molecular weight and stability of protein in comparison with healthy control. The results of the secondary and tertiary structures prediction were obtained by using PSI program and PHYRE2 server respectively. The function of the IFN-γ protein was analyzed by using STRING program that showed the impact of mutations in the function of the protein. Our findings revealed that IFN-γ can be considered as breast cancer marker that can be used in the diagnosis of breast cancer. The effect of mutations that occur in exon4 region had an impact on the translation process including the stability and the properly protein function.

Abstract

Familial hypercholesterolemia (FH) is a genetic disorder characterized by autosomal inheritance in genes related to LDL-C metabolism, with the major clinical features of hyper-LDL-cholesterol and premature coronary artery disease. The aims of this study are to determine the Expression of LRP-1 gene and mir-205 in different samples of familial hypercholesterolemia and hypercholesterolemia obtained from Ibn Al-Nafees Hospital for Cardiovascular Medicine and Surgery in Baghdad/Iraq and from Private Laboratories in Baghdad/Iraq. compared with samples of apparently healthy individuals, and to study the impact of changes in LRP-1 and mir-205 in order to elucidate possible susceptibility to cardiovascular diseases. In the present study, whole blood was collected from 150 individuals distributed into three groups as follows: Fifty samples from apparently healthy volunteers, fifty samples from patients with hypercholesterolemia and fifty samples from patients with Familial hypercholesterolemia. Total RNA and miRNA were extracted and total RNA and microRNA were converted to cDNA and the expression of LRP-1 and mir-205 were measured by qRT-PCR and comparative analysis method. Primers for this study were designed using bioinformatics programs and NCBI. Results reached significant in LRP-1 gene with (0.1445) folds of gene expression in familial hypercholesterolemia compared with apparently healthy group (1.00) folds of gene expression, while in hypercholesterolemia group was (0.5625) fold of gene expression in compared with apparently healthy group (1.00) folds of gene expression.There were significant variations in mir-205 results, with the amount of gene expression in familial hypercholesterolemia being higher (14.70) than the apparently healthy group (1.00), and the amount of gene expression in the hypercholesterolemia group being higher (4.08) than the apparently healthy group (1.00). The results showed that microRNA, which is known for gene silencing either through mRNA degradation or translation repression, may contribute in the down-regulation of LRP1 expression, as one microRNA, mir-205, has been reported to regulate LRP1. This mir-205 has been found to suppress LRP1 expression by limiting the translation of LRP1 mRNA into proteins without changing the mRNA level, which is consistent with our findings of lower LRP1 protein expression. As a result, mir-205 is overexpressed in the cardiovascular system, suppressing LRP1 translation and thereby lowering LRP1 protein levels. The results of this study showed that the correlation between parameters and study groups were a significant increase in the gender (p-value 0.0372), high significant in blood pressure, diabetes (p-value 0.0001) and smoking (p-value 0.0006). while, the results of effected gender on gene expression of LRP-1 show non-significant except gene expression of mir-205 in H shows a significant (pvalue 0.0499), effect of diabetes on gene expression of LRP-1 shows a significant (p-value 0.049). while, in mir-205 there was no significant. The results also show there were no significant between blood pressure, smoking and gene expression of LRP-1, mir-205. The results of this study showed that there was high significant the levels of (TC, TG, HDL, LDL, VLDL and vitamin D3) except (urea) was a significant. While, the results of (creatinine, FBS and Ca+2) showed a non-significant in both groups of patients with familial hypercholesterolemia and hypercholesterolemia compared to the apparently healthy group.The results of LRP-1, mir-205 genes expression with lipid profile (TC, TG, HDL, LDL and VLDL), kidneys functions (urea and creatinine), FBS, Ca+2 and Vitamin D3 showed there were positive strong correlation between the fold expression of mir-205 with triglyceride and VLDL (r= 0.28, P ≤0.05), (r= 0.27, P ≤0.05) respectively. Also, the result shows a strong negative correlation between cholesterol and mir-205 expression (r= -0.27, P ≤0.05). while, other parameters show no significant.

Abstract

In this research, the study aimed to analysis the sequence and structure of Transcription Factor 7 Like 2 gene (TCF7L2) in Iraqi Diabetic mellitus type II (T2DM) patients and compares with standard sequence form National Center of Bioinformatics Tools (NCBI) using BLAST. Blood samples of (75) (T2DM) Iraqi patients, was collected from Al-Mustansiriya University National Diabetes Centre in Baghdad province/Iraq (17-65 year), And (75) blood samples of healthy control was used to compared with the T2DM patients samples. Extracted DNA from whole blood of patient’s samples using the Quick-DNA™ Blood MiniPrep kit then sent the samples to Korea at Macrogen Corporartion Company, where they used automated DNA sequencing for sequence analysis. The results of the sequence analysis of (T2DM) patient’s samples, we found: many missense mutations, one deletion mutation, and thirteen silent mutations detected using BLAST in (NCBI). All mutations appeared at the same sites of the gene which controls the rate of genetic information transcription that indicates to have a relationship with (T2DM). These mutations were recorded on the (NCBI). The physicochemical properties of (TCF7L2) determined in the present study included; alpha-helical structure and 3-Dimension structure appeared contrast when compared with the gene template. Briefly, mutations effected (TCF7L2) which influences the structure, physicochemical properties of the protein, and the secretion of insulin hormone which is maintain glucose level in blood.

Abstract

This study was contribute to analyze and understand the function of Interleukin-17A protein using bioinformatics methods, Interleukin-17A is a pro-inflammatory cytokine that belongs to the Interleukin-17 family. The Interleukin-17A gene encodes at Chr. 6 p12.2 The blood samples of the current study were collected from the Oncology Teaching Hospital for Cancer Treatment in Baghdad / Iraq, The total number of samples in this study was (60) for patients of breast cancer and (20) for healthy control subjects. Interleukin-17A protein level was measured in blood samples by ELISA technique after separating sera from other components the results was found that Interleukin17A concentration has been significantly elevated in patients with breast cancer, where DNA was extracted from whole blood samples and PCR was done using specific primers designed for the purpose of this study to amplify Interleukin-17A gene, where the gene sequence was obtained using an automated sequencer, and then bioinformatics methods were used to analyze the function and predicting the structures of the Interleukin17A protein. The results of the BLAST program, which is used to detect mutations in the rs2275913 region within the Interleukin-17A gene sequence, include substitution , frame shift and deletion mutations in breast cancer patients, where the BLASTX program was used for the purpose of translating the sequence of nucleotide to the amino acids sequence (protein sequence), The results show mutations in breast cancer patients that occur in the rs2275913, can affect the protein synthesis .The genetic alteration occurring in the sequence of the rs2275913 has an effect on the transcription and translation processes that cause alterations in mRNA and can be correlated with many diseases. The physiochemical properties of the primary protein composition were then calculated by using ProtParam program which the results showed molecular weight of Interleukin17A protein for patients with breast cancer were decreased or increased compared with healthy subjects. The results of the secondary and tertiary structures prediction were achieved by using PSI program and PHYRE2 respectively, the results showed that the mutation has affected the percentage of alpha helix, beta turns and random coil for breast cancer patients and the tertiary structure of Interleukin17A protein. The function of the Interleukin17A protein was analyzed by using STRING program that showed the impact of mutations in the function of the protein result is either a loss of function or a gain of function. From all the results that obtained in this study, we concluded that Interleukin17A protein can be considered as breast cancer marker that assist their diagnosis .The effect of mutations have impact on the translation process including the stability and the protein functions.

Abstract

Fifty isolates of Klebsiella pneumoniae were collected from 133 urine samples from persons suffering from urinary tract infection from the period (2020/07/1) to (2020/09/25) from various laboratories. These isolates consist of 13 males and 37 females. Their ages ranged between (19-55) years. Klebsiella pneumoniae isolates were identified by several methods, including microscopy, culturing them on different culture media, several biochemical tests, and in addition, they were identified by the Vitek2Compact device. The antibiotic susceptibility test was done by the Kirby–Bauer disk diffusion technique. The results show that about [n=46(92%)] of Klebsiella pneumoniae isolates are multidrug resistant (MDR). The biofilm production of Klebsiella isolates was detected using a 96-well microtiter plates. The results show that [n=24 (48%)] of isolates form strong biofilm, [n=12 (24%)] form moderate biofilm, [n=10 (20%)] form weak biofilm, and [n=4 (8%)] do not form biofilm. The Modified Double Disc Synergy Test (MDDST) was conducted to detect the production of Extended Spectrum β-lactamase (ESBL) enzymes. The results show that approximately [n=45 (90%)] of the isolates produce ESBLs. The most common ESBL genes (TEM, SHV and CTX-M) were investigated in isolates. The results show that the SHV gene was the most popular among ESBL genes [n=34(68%)] then, the CTX-M gene [n=33(66%)]. while none of the isolates possessed the TEM gene. Virulence factor type 3 fimbriae (MrKD) gene and biofilm (BssS) gene were revealed. The results found that the isolates contain MrKD gene at [n=41 (82%)]. Also, it was found that the MrKD gene exists in all isolates that produce biofilm. These results suggest that there is a link between biofilm development and the presence of the MrKD gene. Whereas the results found that the isolates contain BssS gene at [n=36 (72%)]. The BssS gene is present in all isolates that produce strong and moderate biofilm, but is not present in isolates that produce weak biofilm or not produce biofilm. The prevalence Virulence genes within ESBL-producing K. pneumoniae isolates show that only [n=3 (6%)] of isolates which are non-ESBL producers carry one or both virulence genes, while [n=41 (82%)] of ESBLproducing isolates contain one or both virulence genes. The effect of Tea tree oil and Cinnamon oil on the mature biofilm of Klebsiella isolates was studied, and the minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) of the oils were determined. The results showed that the (MIC) for Tea tree oil is 0.25% and (MBC) 0.5%. While (MIC) for Cinnamon oil is 0.125% and (MBC) 0.25%. The results showed that both oils had good efficacy against strong biofilm for K. pneumoniae isolates. But in comparison between them, Cinnamon oil showed better results. The effectiveness of the two oils was studied together using the Checkerboard technique. And the results showed the antagonistic effect.

Abstract

Triple-Negative Breast Cancer (TNBC) is one of the most deadly and aggressive forms of breast cancer. Because of the complete negative receptors, this kind of breast cancer has a poor prognosis and few therapeutic choices. The majority of therapies for this condition have failed due to low bioavailability, solubility, and selectivity. Layer by Layer (LbL) is a novel approach suggested for this illness. In the present study, the Tamoxifen/Resveratrol were prepared by LbL nanoparticles based on drug delivery system for potential evolve activity of therapeutic properties against TNBC cells the synthesis through a hydrotrope method using Poloxamer407, Glyceryl monooleate, Chitosan and Hyaluronic acid polymers which act as encapsulating agents. The current method was simple and low cost. There are several characterization techniques to Tamoxifen/Resveratrol Layer by Layer-Liquid Crystalline Nanoparticles (TAM/RES-LbL-LCNPs) such as UV-VIS spectroscopy, Fourier Transforms Infrared Spectroscopy (FTIR), X-Ray Diffraction (XRD), Zeta Potential Analysis and Particle Size, Field Emission Scanning Electron Microscopy (FESEM) and Transmission Electron Microscopy (TEM) studies were performed and confirmed the synthesis of nanoparticles. Where the UV-Vis spectroscopy analysis for tamoxifen indicated that the top peak for it could be seen at 207 nm, when the top peak for resveratrol could be seen at 308 nm, TAM/RES-LbL-LCNPs showed top peak at 226 nm, FTIR analysis was used to evaluate the molecular states and functional groups of TAM/RES-LbLLCNPs. XRD, FESEM and TEM studies confirmed the existences of TAM/RESLbL-LCNPs. These results confirmed the conversion of TAM/RES to its amorphous state without probable chemical interaction that could result in enhanced TAM/RES solubility also showed that the prepared particles were spherical in shape and have a smooth surface with the diameter ranging between 180–205 nm. Zeta Potential was +45.05 mV with the PDI value 0.089 and mobility was 0.89 V/cm. The effect of TAM/RES-LbL-LCNPs on structural alteration of the DNA double helix sample induced by DNA damage was investigated, and the results revealed that TAM/RES-LbL-LCNPs can reduce H2O2 activity and induced DNA damage due to its ability to scavenge ROS due to its antioxidant property, and that this reduction effect is concentration dependent. Hemolysis activity of TAM/RESLbL-LCNPs was investigated. The results show TAM/RES-LbL-LCNPs biocompatible and safely which gave a dissolution rate of 4.7% at a concentration of 100µgmL-1 , which is the value allowed internationally by the American Society for Testing and Materials (ASTM). The cytotoxicity effect of TAM/RES-LbL-LCNPs was assessed against the human breast cancer cell line (MCF-7) and Triple negative (CAL-51) by using MTT assay, the results showed a concentration-dependent cytotoxicity, the inhibitory concentrations (IC50) was found to be 6.13 μgmL-1 and 4.62 μgmL-1 for TAM/RES-LbL-LCNPs against (MCF-7) and (CAL-51) at 24 hours. The second technique was carried out by using clonogenic survival assay of MCF-7 and CAL51 cell lines with TAM/RES-LbL-LCNPs at three concentrations of 2.5,5 and 10μgmL-1 . The concentration was performed for 24 hours, and the results indicated that TAM/RES-LbL-LCNPs reduced the number of colonies of MCF-7 and CAL51 cells. The apoptosis was studied in both cell lines after treatment with TAM/RES-LbL-LCNPs through six types of assessments, which are hematoxylin, eosin, acridine orange, ethidium bromide and gene expression of p53 and caspase8 analysis. The results revealed that TAM/RES-LbL-LCNPs induced cell death only through apoptosis which detected by the above-mentioned assessments and increased nuclear morphological alterations. In an in-vivo assessment of toxicity in an animal model, findings showed that there was no statistically significant difference in body weight between TAM/RES-LbL-LCNPs-treated mice and control mice (P ≥ 0.05). The levels of Alanine transaminase (ALT), Aspartate transaminase (AST), and Alkaline phosphatase (ALP) in blood were examined as a measure of hepatic functioning, and the levels of Blood urea (BU), Creatinine (Cr), and Uric acid (UA) as a measure of renal functionality. At contrast to the healthy control, no significant statistical changes (P ≥ 0.05) were detected for the evaluated indicators in both dosages of 25mg/Kg and 150mg/Kg. And histopathological were estimated after 14 days of intraperitoneal injection with two doses; 25mg/Kg and 150mg/Kg. Our findings show that TAM/RES-LbL-LCNPs have no adverse effects and might be employed in clinical trials in the future, also have less toxicity on DNA molecule in normal cells, good hemocompatibility through less hemolytic toxicity on RBCs, It is also have toxic activities against human breast carcinoma cell line MCF-7 and CAL-51 through actively targeting cancer cells that overexpress CD44-receptors. TAM/RES-LbL-LCNPs lead to cellular morphological alteration and mitochondrial dysfunction, and such effects accompanied with DNA damage in both cancer cell line triple positive and negative breast cancer, Furthermore, could successfully enhance pharmaceutical properties and therapeutic potency of TAM/RES-LbL-LCNPs paving the way for its safe use in cancer therapy.

Abstract

In the last decade studies and applications on biosurfactant s were established due to their high efficiency to mix up between two immiscible liquids in the form of emulsions or micro-droplets. In January/2020 yeasts were collected from three types of commercial yeast and isolated from two species of fruits (kiwi and orange) and from two species of vegetables (cucumber and green pepper). Fourteen yeast isolates were tested for their ability to produce biosurfactant by measuring its emulsification index only one isolate from commercial yeast was able to produce biosurfactant with a high emulsification index (58%). Saccharomyces cerevisiae was used for the production of intracellular and extracellular biosurfactant, the intracellular biosurfactant showed good ability to reduce the surface tension of distilling water from 70mN/m to 56mN/m , also it was able to spread the oil layer 10mm. The emulsification index (E24) of the intracellular biosurfactant against crude oil, machine oil, olive oil & cooking oil were 100, 80, 35 and 56 % respectively. The crude biosurfactant was partially purified by ethanol precipitation method and E24 was used to determine any remaining activity of it showed 48% but the formed emulsion wasn’t stable as the crude biosurfactant. The protein and sugar content of intracellular biosurfactant were 578.4μg/ml and 312 μg/ml respectively, also Fourier-transform infrared spectroscopy was used to determine the functional groups of the biosurfactant it showed the biosurfactant contained functional groups that belonged to protein glucan and mannan. The crude biosurfactant was used to aid the biodegradation of crude oil by Pseudomonas aeruginosa, the degradation of crude oil was observed during 30 days and gas chromatography –mass spectroscopy was used to detect the degradation and components of a control crude oil (negative control), positive control without biosurfactant and with biosurfactant the best biodegradation percentage was the positive control with 1ml of biosurfactant (50.4%) when compared to positive control without biosurfactant (33.25%) and the less biodegradation rate was with 1.5ml of biosurfactant (26.16%). Also Saccharomyces cerevisiae was also tested for the ability to produce extracellular biosurfactant. The carbon sources that were used for this purpose were glucose, crude oil, olive oil and cooking oil. The biosurfactant reduced the surface tension from 68mN/m to 56, 58, 53and 54mN/m for each sample respectively and were able to spread the crude oil to 3, 45, 40and 35 mm respectively. Antimicrobial activity of the biosurfactant was tested against Escherichia coli, Staphylococcus haemolyticus and Pseudomonas aeruginosa only S. haemolyticus showed an inhibition zone of 3mm. The methods that were used to determine the efficiency of the produced biosurfactant (intracellularly and extracellularly) showed that the intracellular biosurfactant was better in reducing surface tension but the extracellular biosurfactant didn’t show a remarkable results of the reduction of surface tension. However the production cost of the extracellular biosurfactant was lower than the production cost of the intracellular biosurfactant due to the use of carbon sources that enhanced the production of biosurfactant with no need for any interfere to extract it.

Abstract

The work in this study contribute to understand of HLA-G protein using bioinformatics methods, HLA-G protein is one of the non_classical major histocompatibility complex class I (MHC-I) also known as human leukocyte antigen (HLA) in human which found on the surface of the leukocyte and it is encoded by HLA-G gene at position 6p22.1. Blood and serum samples were collected from Al-Amal National Hospital for Cancer Treatment in Baghdad province / Iraq. The total number of samples in this study was (70) of breast cancer patients and (30) for healthy control subjects. The serum of the study samples was used to measure the HLA -G protein by using ELISA technique. The DNA extracted from the whole blood of the samples and the primers were designed to be used in polymerase chain reaction (PCR), these primers to amplify the region of the HLA-G gene, the sequence of HLA-G gene was obtained by automated sequencer followed by the use of various bioinformatics tools and methods for analyzing the function and predicting the structure of HLA-G protein. BLAST programs result showed mutations in exon 8 of the HLA-G gene these mutations were substitution, frame shift, missense in patient with breast cancer. BLASTx program was used to translate the nucleotide sequence (protein sequence). The physiochemical properties of the primary structure of the human leukocyte antigen-G protein were computed by using ProtParam program which showed the effect of mutations on the molecular weight, stability of the protein comparison with healthy control. The results of the secondary and tertiary structures prediction were achieved by using PSI program and PHYRE2 server. The function of the human leukocyte antigen-G protein was analyzed by using STRING program that showed the impact of mutation in the function of the protein. From all the results that obtained in this study, we concluded that HLA-G protein can be considered as breast cancer marker that assist their diagnosis. the effect of mutations that occur in exon 8 region have impact on the translation process including the stability of the properly protein function.

Abstract

Cancer is a disease occurs due to genetic changes. Both genomic profiling and mutational analysis in the last years have been taken place in the progress of thyroid, breast and prostate cancer. The aims of this study are to determine the Expression of fosl_1 in different samples of thyroid, breast and prostate cancer obtained from Al - Amal National Hospital for Cancer Treatment in Baghdad/Iraq. compared with samples of apparently healthy individuals, and to study the impact of changes in fosl_1 in order to elucidate possible susceptibility to thyroid, breast and prostate cancer. In the present study, whole blood was isolated from 100 individuals distributed into four groups as follows:  Twenty-five samples from patients with thyroid cancer.  Twenty-five samples from patients with breast cancer.  Twenty-five samples from patents with prostate cancer.  Twenty-five samples from apparently healthy volunteers. Total RNA and DNA were extracted and total RNA was converted to cDNA and the expression of fosl_1 was measured by qRT-PCR and comparative analysis method. Primers and probes for this study were designed using bioinformatics programs and NCBI Results reached significant in fosl_1 gene with 4.331 folds of gene expression in prostate cancer compared with healthy group 1.00 folds of gene expression, while in breast cancer group and thyroid it was 3.931 fold and 3.260 folds of gene expression in compared with healthy group 1.00 folds of gene expression. The results of polymorphism in single nucleotides showed an important role in the development of breast and prostate cancer and that the presence of these SNPs has a role in increasing the susceptibility of individuals to cancer, as the variation in the AA genotype at the site followed by the GA genotype at the same site shows high-risk damage. The results of this study indicate that the gene expression of FOSL_1 can provide an initial picture of the predisposition of prostate cancer. Our study also demonstrated that (rs 1892901) SNP of fosl_1 gene is associated with an increased risk of prostate and breast cancer among the Iraqi population unlike the thyroid cancer which shows non-significant difference with the control. Also, the analysis of nucleotide sequences using bioinformatics programs showed that there are a number of variants in the fosl_1 gene that may be associated with cancer Nucleotide polymorphism variants and different genotypes of fosl_1 gene have important roles in the development of cancer. Their application on cancer patients could discriminate those with high susceptibility to DNA damage from those with low susceptibility.

Abstract

Staphylococcus aureus is one of the major bacterial human pathogens that cause a wide range of clinical aspect and its infection is common in both the community as well as in the hospitals. S.aureus produces a number of harmful toxins. The α-hemolysin is the most notable toxin that can be determined by its property as an analytical marker of red blood cells. Hemolysis referred to the α-toxin that based on its wide range of cellular privacy, causes injury in the context of skin necrosis and deadly infection. In the present study, S. aureus hemolysin was used as a model of the toxin that produced from pathogenic strain of S. aureus, isolated from patient wounds. The toxin was produced from S. aureus after 40 hrs of incubation at 37 ºC in tryptic soy broth medium. The supernatant was precipitated after centrifugation with 75% ammonium sulfate before purification by DEAE- cellulose and sephacryl-S200 chromatography, the molecular weight of obtained α-hemolysin toxin was 36.545 KD. Detoxification of pure hemolysin had been done under incubation temperatures of 30-70 ºC and two types of UV light. On the other hand, calcium phosphate nanoparticles (CAP) was prepared and characterized by UV-VIS spectrophotometer, Scanning electron microscope (SEM), Zeta potential, Fourier transforms infrared spectroscopy (FTIR) and X-ray diffraction (XRD). The CAP-NPs appeared spherical in shape with diameter average 36-67 nm, while zeta potential of CAP-NPs was -34.47 mV. Moreover, the FTIR analysis revealed the presence of the (C-H) bond recorded at 2924.09, 2854.65 cm−1, while wavenumber 1400.32, 1593.2 cm−1 referred to the presence of carbonate groups (C≡O) group. Furthermore, the (P-O) stretching of phosphate absorption bands was seen at 1072.42, 1280.73 cm−1 . The XRD pattern revealed crytallinity of free CAP-NPs displayed by three distinct diffraction peaks at 25, 31and 41degrees. On the other hand, the transform of CAP-NPs from crystallinity to the amorphous state was observed in the XRD pattern when combined with hemolysin. CAP-NPs were used as neoadjuvant to combine detoxified hemolysin. The combination was used to induce T-lymphocyte transformation and cytokines secretion in vitro. Lymphocyte proliferation with 1.4µg/ml detoxified hemolysin was six times higher than control, while 0.7µg/ml of detoxified hemolysin increased proliferation to 4.5 fold compared to the negative control. Two examined concentrations of 0.7 and 1.4μg/ml of detoxified hemolysin was used to stimulate cytokines production. IL1β production was stimulated to 2.8 and 16.4 pg/ml, while IL-6 was stimulated to 1 and 18pg/ml, respectively.

Abstract

In the present study, gold nanoparticles (GNP) have been verified by UV-visible spectroscopic analysis, it showed normal UV-visible absorption spectra of GNPs. The top peak of gold nanoparticles could be observed at (525) nm. Scanning Electron Microscopy (SEM) has used for studying the morphology of GNPs and for detecting the size and shape of the GNPs. It showed the spherical form of gold nanoparticle with diameter 10 nm. In the current study, the in vitro effects of GNPs as anti-inflammatory agents was measured by treated of Bone marrow derived macrophages BMDMs to LPS and ATP in the presence and absence of (25 µg/ml) and (50 µg/ml) GNPs. The results show that GNPs inhibited LPS, ATP induced interleukin 6 (IL-6), IL-1 β, and Tumor necrosis factor-alpha (TNF-α) production by BMDMs cells in a dose dependent manner. On the other hand, it has been demonstrated the effect of GNPs on the activity of phagocytic cells against S.auerus bacteria, E. coli bacteria, and against Ehrlich ascites tumors EAT and overian cancer cells (SKOV-3) In-vivo and In-vitro model. GNPs markedly increased the percentage activity of phagocytic human neutrophils after infection with S.aurues following adding GNPs at 10µg/ml. Also, pre-treated BMDMs by GNPs at concentration 10µg/ml showed significant increase in intracellular killing activity of the S.aurues and E.coli. Likewise there was considerable increase in phagosomal acidification of these cells. Upon bacterial challenge, GNPs showed induction of the clearance activity of the bacteria that was accompanied by significant improvement of the maturation of the phagosomes and the production of reactive oxygen species (ROS) through the NOX2 machinery. It is likely that part of the antibacterial efficacy of the tested nanoparticles was the results of increased phagocytic cells’ biological activity. The decrease in bacterial survival in GNPs-treated phagocytic cells was correlated with induced reactive oxygen responses towards the invading pathogenic bacterial strains. The effect of GNPs on the tumorcidal activity of the peritoneal macrophage against Ehrlich Ascites tumor cells have been assessed, the results demonstrate that GNPs cause considerable elimination of EAT cells when treated with single dose 10 µg/kg. GNPs also increase phagocytic activity of BMDMs against ovarian cancer cells (SKOV-3) when treated BMDMs with 10 µg/ml of GNPs. To study more immunological markers induce by GNPs, the effect of GNPs on the autophagy pathway was investigated. BMDMs were pre-treated for 1 hr with GNPs at concentration (10 µg/ml) and then treated with LPS, ATP for 24 h. The results showed that the GNPs increased the process of autophagy. Finally, The toxicity GNPs using animal model were investigated. Animal's body weight, liver and kidney function enzymes, and histological alterations for liver, kidney, and lungs were addressed. The findings demonstrated that nanoparticles were biocompatible with liver and kidney function enzymes and no significant alterations were recorded in the liver, kidney and the lungs.The present work exhibited that GNPs could modulate immune system parameters. Taken together, the results of the current study demonstrated that GNPs could be used clinically for therapeutic purposes in the futur.

This study aims to investigate the optoelectronic properties of Co3O4/ZnO/Si double heterojunctions. We investigated the effects of spray cycles and, consequently, the film thickness of Co3O4/ZnO/Si films prepared by Chemical Spray Pyrolysis CSP, while at 350° the substrate temperature was kept constant on the morphological, structural, optical and electrical properties of the films. Investigation the relationship between film thickness, crystallinity, surface morphology, phase stability, topography, and optical properties can provide valuable information for the development of Co3O4/ZnO/Si based devices for optoelectronic applications. The synthesis and characterization of highly oriented nanostructured ZnO thin films by CSP with using an aqueous zinc chloride solution were investigated. The effects of film thickness on the morphological, structural, optical and electrical properties of the films were investigated. X-ray diffraction analysis revealed that all films exhibited a polycrystalline hexagonal wurtzite ZnO structure with a preferential orientation in the (002) direction. As the film thickness increased from 200 nm to approximately 390 nm, the crystallite size increased from 8.97 to about 15.54 nm. However, no significant change in the crystal lattice constant was observed. The stoichiometry of the as-deposited films was determined by energy dispersive x-ray spectroscopy (EDS). Additionally, atomic force microscopy (AFM) was utilized to measure the roughness RMS value, which demonstrated an improvement in surface roughness with increasing film thickness. The optical energy gap decreased from 3.1 eV to 2.8 eV with increasing film thickness. According to the results, the higher thickness films are superior to the thinner ones in terms of crystallinity quality and electrical properties. The nanostructured Co3O4 thin film was prepared on glass and silicon substrates by CSP using CoCl2 solution. The impacts of film thickness on the characteristics of the films were investigated. XRD results indicated that all films have a polycrystalline cubic phase structure with a preferential orientation in the (111) direction. As the film thickness increased, the crystallite size also increased, the crystallite size increased from 205 nm to about 439 nm, but no significant change in lattice constants were observed. The films developed two absorption edges, with the energy gap decreasing with increasing film thickness from 2.1 eV to 1.9 eV and from 1.49 eV to 1.47 eV. The Co3O4/ZnO/Si double heterojunctions were fabricated with different layer configurations on glass and silicon substrates. Morphological analysis reveals variations in nanorod orientation, packing density, and porosity with average grain sizes of about 100 nm. Based on the optical properties, triple energy bandgap regions were observed. ZnO shows an energy bandgap from 2.35 eV to 3.15 eV, while Co3O4 shows energy bandgaps from 1.85 eV to 2.23 eV and 1.35 eV to 1.5 eV. The responsivity measurements show that the Co3O4/ZnO/Si double heterojunction exhibits the highest responsivity over a wide range of wavelengths, with distinct peaks at 480 nm and 950 nm. This indicates that the photodetector is capable of detecting both visible and infrared light. These results provide valuable insights into the optimization of Co3O4/ZnO/Si double heterojunctions for broadband, high-performance photodetection applications.

A two-step unique approach is used to create purified as well as ligand-free gold quantum dots as a novel kind of fluorescence material. Noble Au targets are submerged in benzene solvent to evaluate the impact of changes in laser energy as well as the impact of laser re-irradiation on Au quantum size. Three samples of gold quantum dots AuQDs are prepared by pulsed laser ablation in benzene solvent at pulse fluencies of 4, 8, and 12 J/cm2, which are referred to as F1, F2, and F3, respectively. In addition, Syntheses three samples of GQDs (S1, S2 and S3) are carried out by laser ablation and re-irradiation of Au target in Benzene. Nd:YAG laser was utilized in the current experimentation with laser energy density of about 12 J/cm2, a wavelength of 1064 nm with 1000 laser pulses (S1). Then, the wavelength of 532nm with two different pulses repetition of 1000 (S2) and 2000 pulses (S3) was utilized as re-irradiation to reduce size. The prepared AuQDs got defined using UV-Vis, HR-TEM, XRD, XPS, EDX, FTIR, Raman spectroscopy and Photoluminescence measurement. AuQDs that were synthesized have monocrystalline and cubic (FCC) structure, according to XRD patterns. It was found out that the direct optical energy gap of AuQDs is enhanced to 2.35 , 2.5 and 2.6 eV. The emission photoluminescence emission spectra is at roughly 481, 445, and 437 nm, for F1, F2, F3 samples, respectively. The quantum size was reduced to 3.5 nm for sample F3. This strategy has the ability to prepare pure AuQDs in one step .On the other hand, the UV-visible spectra for re-irradiated GQDs produced at three distinct samples S1, S2 and S3, reveal a UV peaks at 311 nm, 309 nm, and 307 nm, respectively. The optical energy gap values of GQDs were shown to be within the range of 2.5, 2.7 and 2.8 eV of samples S1, S2 and S3, respectively. The Photoluminescence emission spectra maximum peak heights were observed at about 445, 432, and 405 nm for the specimens S1, S2 plus S3, correspondingly. In contrast to the control specimen (S1), the data obtained demonstrate that the re-irradiated quantum dots in Benzene (S3) have blue shift and higher Photoluminescence and the sizes of quantum dots are less than 2 nm for S3. That results promising biosensor and bioimaging applications.

In this study, Lithium Niobate (LiNbO3) thin films have been successfully deposited on quartz substrates by chemical bath deposition method. The influence of different interaction time, and different deposition time were studied. The structural investigation confirmed that all LiNbO3 were hexagonal structure at (012) diffraction plane. The optical properties were conducted by UV-VIS showed an increased to 4 eV. The morphological properties showed a uniform, smooth and homogeneous structure, with a clear hexagonal structure. The grain size was reduced with increasing the interaction and deposition times. Electrical properties revealed that electrical resistivity (ρ) reached to a minimum value about (65 kΩ) for deposition time 25 min. The estimated figures of merit releaved that optimum deposition time was 15 min and stirred for 12 hrs. To demonstrate the effect of Ag nanoparticles incorporated on the LiNbO3 properties, the preparation of Ag decorated LiNbO3/Si and LiNbO3/Si heterojunction device was constructed. Different concentrations of Ag nanoparticles were synthesized and studied their structural, morphological optical and chemical properties. XRD confirmed the presence of LiNbO3 and Ag nanoparticles. FESEM showed that the Ag nanoparticles increased as Ag immersion time increased. The band gap decreased from (3.97 to 3.59 eV) as Ag immersion time increased. Photolumences spectra (PL) of Ag@ LiNbO3 films gave emission peaks at (358, 360, 363, 371 and 376) nm. Results of Raman spectrum showed that after decorated with Ag Nps the (950 cm-1 ) peaks shifted to higher intensity. The prepared device at an optimum condition of decoration has been used to prepare the heterojuction device. A clear enhancement has been achieved with the incorporation of Ag nanoparticle. The photo and dark currents with capacitance-voltage characteristics were investigated and analyzed. The ideality factor (n) was found to be enhanced and to about 2.6 for Ag@ LiNbO3/Si heterojunction device. The C-V characteristics demonstrated that the built-in potential (Vbi) was about 1.35 for Ag@ LiNbO3/Si. The photo detector showed a good stability and high; responsivity that reached to about (400, 790) nm in the UV and NIR region or pure and Ag@ LiNbO3/Si photo detector; respectively. Detectivity reached to about (400, 790) nm in the UV and NIR region for pure and Ag@ LiNbO3/Si photo detector; respectively.

This work presents a successful method for the preparation of Nb2O5 nanoparticles by employing the pulsed laser ablation in liquid (PLAL) method of a niobium metal in double deionized water. In this study, the effects of various laser parameters on the preparation of Nb2O5 nanoparticles were characterized extensively through the study of the optical, structural, morphological and chemical properties. Optimum conditions were selected after each parameter and analysis. The effect of laser fluence which ranged from 8.2 to 17.82 J/cm2 and resulted in the emergence of the orthorhombic T-Nb2O5 which was confirmed by XRD, FTIR and Raman spectroscopic analysis. The band gap dropped from 3.6 to 3.3 eV as the fluence went up. TEM and FESEM showed a spherical shaped and agglomerated particles with an average particles size range between 28 to 55 nm. Changing the number of laser pulses have led to the emergence of monoclinic H-Nb2O5 along with the orthorhombic T-Nb2O5 which was confirmed by XRD, FTIR and Raman spectroscopy. The average particles size ranged between 18 and 27 nm for TEM. While the effect of laser wavelengths, have resulted in the dominance of the monoclinic H-Nb2O5 phase over the orthorhombic T-Nb2O5. TEM and FESEM showed very small, well-defined spherical shapes with very high concentration with an average particle size 7 nm for TEM. Optical properties revealed that the band gap was about 3.4 eV. After studying the characteristics of the effect of each laser parameter on the fabrication of Nb2O5 nanoparticles, optimum conditions were selected and used for the fabrication of Au@Nb2O5 core shell nanoparticles. Different concentrations of Au nanoparticles were synthesized and their structural, morphological, chemical and optical characteristics were studied. XRD results confirmed the presence of Nb2O5 and Au confirming the formation of Au@Nb2O5 which was also confirmed by TEM results. The diameter of the core increased from 33.5 to 80.1 nm while the shell diameter changed from 5.5 to 8.05 nm with increasing the concentration of Au nanoparticles. Surface roughness found to be increase up to 68.76 nm. The absorbance spectrum revealed a red shifted as the concentration of Au nanoparticles increased, while the band gap decreased from 3.3 to 2.7 eV.

In this work, a novel approach is proposed to synthesis Raman active AgNPs and Ag@AuNPs/pre-etched Si substrate by laser assisted thermal penetration process. Four different types of superficial silver nanoparticles /pre-etched Si structures were prepared by dipping process of surface textured Si substrate in 5×10 -3 M AgNO3 (Silver nitrate) solution and different dipping times (1,4,5, and10 min). The irradiation process of Nd:YAG laser wavelength of 532 nm,600mJ energy, and 300 pulse repetition rate was employed to insert the silver nanoparticles (AgNPs) deeply inside the silicon (Si) surface. The morphological and optical properties before and after the irradiation process, show a significant value in the Specific Surface Area (S.S.A), where 72.04 m2 . g-1 was obtained for the silicon substrate of 5 min dipping time, also in this work, the deposited silver nanoparticles on a pre-etched Si substrate were modified by laser irradiation at fixed laser fluence. Different number of pulse have been employed to synthesize hybrid structure AgNPs/pre-etched Si substrate, by laser irradiation process. Four types of superficial hybrid structures were formed under fixed laser thermal of 600 mJ/cm2 with 250,300,350 and 400 pulses of laser, respectively. The results were analyezed and studied using Field Emission Scanning Electron Microscope (FE-SEM), X-Ray characteristics and optical properties as a function to number of pulses. The results showed a high dependence on the structural and optical of the hybrid structure in the laser irradiation process. The highest specific surface area of 53.008 m2 /gm at (111) plane was realized at 350 pulses. This is due to the small size (10.78 nm) of the silver nanoparticles, Finally, Ag@Au core-shell NPs/ Si (pre-etched silicon layer) were synthesised with various laser pulse repetition rates of 300,350,400,450 pulses, respectively. Also, the results were analyzed by using FE-SEM and XRD characteristics and optical properties as a function of different number of pulse. The results show extreme dependence on the structural and optical properties of Ag@Au core-shell NPs/(pre-etched silicon layer) chemical sensor on the laser irradiation process. The highest specific surface area was 41.318 m2 /gm realized at 400 pulses. The Raman and SERS spectra of the constructed hybrid chemical sensor were carried out using Rhodamine 6G concentrations ranging from (10-7 to 10-13M for core@shell NPs and 10-6 to 10- 12M for AgNPs) on pre-etched silicon .The maximum value of enhancement factor (EF) for the SERS with core@shell configured for 400 pulses was approximately 4.22×109 .While, was around 6.37×108 for the silver nanoparticles /pre-etched Si structures at 5min of dipping time.

Pulsed laser ablation, a simple, inexpensive, and useful approach, was used in this study to prepare PbS quantum dots.Two parts were used to investigate synthesis PbS QDs .First targets are submerged in distilled benzene solvent to evaluate the impact of changes in laser fluence on PbS quantum size. As a consequence of the current work, it is the first time that the synthesis of the lead sulfide nanoparticles as well as the impact of benzene on their characteristics have been described. also, the present work showed that it is possible to obtain PbS QDs by laser ablation in benzene. Three samples of PbS quantum dots are prepared by pulsed laser ablation in benzene solvent and distilled waterat at different parameter , laser fluencies of 5, 6.5, and 8 J/cm2 , with fixed number of pulses 600 hits. A PbS target was irradiated by (1064 nm) with Nd :Yag laser. Laser works in 10 ns laser pulse width and 1 Hz repetition rate. The characteristics of the as-prepared PbS QDs are confirmed by UV−vis, transmittance electron microscopy, X-ray diffraction, photoelectron spectroscopy and photoluminescence (PL). PbS X-ray diffracting pattern is produced via laser ablating inside benzene (5 J/cm2 ,600 pulses), according to XRD patterns where PbS QDs has cubical (fcc) crystal structuring with six main peaks , with 2θ values 21° ,27.7°, 30.4° ,43.6° ,51.1° and 53.6 ° correspond to the crystalline planes (021),(111),(200),(220),(311) and (222) respectively. The Photoluminescence emitting spectra is categorized via the existence of a single severe peak corresponding to the PbS at ( 5,8 J/cm2 ) at 600 pulses. According to the fluorescent peaks of the produced, the calculated band gaps had been situated at 2.5 and 2.6 eV. The quantum size was reduced to 7 to 4.5 nm in benzene and 45 – 19 in water. The UV-visible spectra for PbS QDs peaks around 321 nm , 312 and to 311 nm wave were observed for PbS nanoparticles prepared with 8 J/cm2 ,6.5 J/cm2 ,5 J/cm2 respectively. The results obtained point to the possibility for employing PbS QDs in a variety of (future research) applications, including drug administration, diagnostics, and as anticancer factors, ultimately increasing the tumor-killing effects of anticancer drugs.

In this work, (Silver, Aluminium, and Copper) bulk and nanoparticles plasmas were produced by pulsed Nd: YAG laser with 1064 nm wavelength in air (pulse duration of 9 ns and 6 Hz repetition rate) and at different pulse laser energies (400, 500, 600, 700) mJ. Optical emission spectrometer (OES) was used to diagnose the obtained plasma in air. Optical emission measurements show that the laser energy has a strong and important impact on the intensity of emission lines as the intensity of the spectral lines increases with increasing of laser energy. The effect of laser pulse energy has been studied on the plasma parameters (such as electron temperature (????????), electron number density (ne), Debye length (????????) and plasma frequency (????????)). The results shows, the electron temperature, the electron density and plasma frequency were increased with increasing pulse laser energy from 400 to 700 mJ for the targets used. While the Debye length is decreases with increasing laser energy. It has been observed that the value of the intensity of the spectral lines and electron temperature (????????), electron number density (ne), plasma frequency (????????) for nanomaterial greater than bulk material and the Debye length (????????) of nanomaterial are less than the bulk material at the same laser energy. The Energy Dispersive X-ray Spectroscopy provide a qualitative analysis and a quantitative analysis of samples. where show results the peak heights the formation of Ag at 3keV, Al at 1.5 keV and Cu at 0.9 keV. The synthetic study was carried out by means of X-ray diffraction of the elements of (Ag, Al and Cu) bulk and NPs and the results showed that all samples have a face cube crystalline for powder (Ag, Al and Cu). The reflectivity of the samples was investigated. It was noticed that the reflectivity of the materials decreases in the UV-VIS spectrum of the elements of (Ag, Al and Cu) bulk and NPs. Scanning electron microscopy (SEM) used for studying the shapes and sizes for samples. The average particle size of the samples is in the range (41- 81) nm and it was also clarified by the photographic analysis.

Porous silicon (Psi) structure has been prepared in this project via a Photo Electrochemical (PEC) anodization process. n-type silicon wafers of resistivity (10Ω.cm) in hydrofluoric acid (HF) of 24% concentration at various etching duration (15, 30, 45, 60, 75, 90 min), and current density (20mA/cm2 ). Irradiation was accomplished by diode laser beam with a power density of 15W/cm2 and a wavelength of 810 nm. X-ray diffracted (XRD), Field Emission Scanning Electron Microscopy (FE-SEM), Atomic Force Microscopy (AFM), and Gravimetric technique was employed to assess the material characteristics. FE-SEM images demonstrated that the pore width and depth of the porous layer increased with the rising of etching time, but the thickness of the walls between the pores decreased with increasing etching time. With different etching conditions, the pore shape has changed from cylindrical to spherical and rectangular. The X-ray Diffraction results revealed that the structural aspect of Psi layers stays crystalline, as also the peak of Psi structures broadened when etching time increase from 30 to75 min. The size of the nano-crystalline decreases from (16.84 to 1.96 nm). The AFM image showed changing the surface roughness values and root means a square increased from (5.666-24.94nm) and (5.960- 30.61nm), respectively with increasing etching time. The measured values of the porosity of Psi layer using the gravimetric method showed an increase (33 – 87%) with increasing etching time. When the etching time has increased from (30-75 min), the peak of the (PL) spectra exhibit a blue shift from 639.8 nm to 625 nm in the emission spectra of the as-prepared sample. In this study, electrical properties of the constructed Psi layer were investigated using a which electrical approach that represents resistance characteristics at room temperature. The obtained values of resistance increased from 25 to 73 KΩ with increasing etching time and porosity when measured at pressure atmosphere, while was reduced with the increase of vacuum ranges. Because decreases of the air molecules allow the electron charge to pass through the inside pore with increased vacuum value to 10-6 mbar. The response of the Psi enhanced with increasing vacuum and etching time.

Graphene-ZnO nanohybrid thin films were prepared by spray pyrolysis technique at 350 °C. Different Graphene sheet concentrations of (0.1, 0.2, 0.3, 0.4, and 0.5 wt. %) were used to deposit these films on quartz and silicon substrates. The monohybrid films' structural, morphological, optical, and electrical properties have been investigated. According to the XRD analysis, the structural characteristics show that the deposited films have hexagonal wurtzite for ZnO polycrystalline structure. The crystallite size, dislocation density and micro strain have indicated that the addition of graphene strongly affects the microstructure of zinc oxide films. It was found that the micro strain and dislocation density increased with graphene content rising in the ZnO matrix, while the crystallite size was decreased. The surface morphological analysis of the ZnO-Graphene films reveals that the Graphene content effectively modifies the morphologies and grain growth of the ZnO microstructure. AFM images showed how the grains are distributed and arranged on the surfaces by studying the effect of graphene concentration on the film's properties by measuring the degree of roughness (RMS) and grain size. Furthermore, FESEM images showed several morphological features on the films deposited under various graphene content. When the film surface isn’t covered with graphene, it offers high packing hexagonal grains and narrow grain size distribution. But, when the film surface is covered with a high graphene content of (0.5 wt. %), graphene nanoplates nested with zinc oxide grains were observed. In addition, the optical properties of deposited films exhibited that the maximum transmission value was found in the ZnO film. In contrast, this value will reduce with increased graphene concentration. The absorption coefficient with wavelength decreased with increased graphene concentration. The maximum energy gap was found in the pure ZnO films, which is (3.4 eV); its decreases to (2.7) eV as the concentration of Graphene increases to (0.5 wt. %). The electrical examination had the highest value at (0.5 wt. %) graphene’s concentration; this means that the nanostructure of graphene improves the electrical conductivity of ZnO. The photocurrent was increased gradually with increasing the light intensity at negative bias voltage. No photocurrent saturation with increasing light intensity was observed (good linearity characteristics). The higher current was at a graphene concentration of (0.5 wt. %) with a power intensity of 100 mW. According to the capacitive-voltage characteristics of the films, the capacitance density is reduced with growing reverse voltage due to the extension of the depletion region with increasing reverse voltage. The internal construction effort (Vbi) value range from 0.65 V to 0.3 V for ZnO/Si with (0.5 wt. %) graphene. The maximum spectral responsivity of the photodetector was noticed for G-ZnO synthesized at (0.5 wt. %) Graphene.

The future of the plasmonic devices is heavily challenged by the nanoconstruction schemes of metals which often requires rather fast, lowcost, and high-throughput fabrication techniques. Laser annealing is considered to be an unrivaled tool for surface manipulation of thin metallic films, especially with functional plasmonic devices of pre-determined morphology. The work in this thesis can be divided into two main sections: The first section studied the Nanoplasmonic sensing, based on the plasmonic resonance absorption of thin, irregularly-shaped Au nanostructures film, with a starting thickness of about 15 nm (±3 nm) sputtered on a quartz substrate, to monitor the CeO2 NPs (with an average diameter of 50 nm) film refractive index variations at different film thicknesses (90 nm, 146 nm, 172 nm, and 196 nm). Increasing the film thickness of solution-processed CeO2 NPs film, with layer-by-layer deposition on top of Au nanostructures, shows a significant redshift in the plasmonic resonance absorption of the plasmonic metal, from 580 nm to 611 nm. Such increase is related to the change in the building microstructure of the semiconductor’s film which is reflected in changing its refractive index. Plasmonic surface refractive index sensitivity of 437.5 nm/RIU with FOM of 4.2 has been recorded. The second section utilized a commercial CW CO2 laser, the wavelength of 10.6 µm and optimal power of 15W, to the surface reconstruction of thin Au films, with an initial film thickness of 15 nm (±3 nm) sputtered on quartz substrates, as plasmonic sensing platforms. The effect of two main laser parameters by AFM images on the Au film morphology has been explored namely; power density The best result was scored when 11.7 W/cm2 Average size range 110 nm FWHM 42 nm and scanning speed when 0.5 mm/sec Average size range 77 nm FWHM 44 nm has been recorded. Thermal annealing of Au nanostructured films by the electrical furnace is also been studied, at 600 oC Average size range of 116 nm FWHM 41 nm has been recorded. UV-Visible (UV-Vis) spectroscopy characterization measurements are utilized to monitor the plasmonic-induced optical absorption changes with different experimental conditions. Surface annealed Au nanofilms were then be used as a plasmonic sensing substrate to detect the size and density variation of Ag NPs, fabricated by pulsed Nd: YAG laser ablation, with a pulse duration of 7 n sec, in DI water with a wavelength of 1064 nm and different laser energies, imbedded in a solution-processed thin semiconductor material (CeO2 NPs) to form a composite film. Our plasmonic sensing structure shows a remarkable detection of variable concentrations of Ag NPs reflected by a significant red-shift in the plasmonic resonance absorption of Au nanostructures with laser ablation energy at a fixed number of pulses of 50 (50 Hz). This sensor structure is versatile and can be utilized to sense and monitor a large variety of materials and chemicals.

In this work, an efficient vacuum sensor was fabricated using a double-sided porous silicon layers (Ds-Psi). An n-type Si wafer was used to create the Ds-Psi samples using laser-assisted etching (LAE) technique. The etching process was carried out under different etching times (20, 40, 60, 80) min by 630 nm wavelength diode laser with 20 mA/cm2 current density and 100 mW/cm2 laser power density. The morphological, structural and optical characteristics of Ds-Psi layers were studied using field emission scanning electron microscopy (FE-SEM) images, Xray diffraction patterns (XRD), and the photoluminescence (PL) spectra. The obtained results, present that the surface morphology of the layer consists of mud-like structure with ultra-pores structures, The X-ray Diffraction illustrated that the Psi has a wider diffraction pattern compared with the bulk silicon and this due to the existence of silicon nano crystallites with nano regime, and the PL emission showed a specific peak centered at about (500-520) nm with decrease in the peak toward a blue shift with increasing etching time. The electrical properties of the fabricated sensors, of one side, parallel connections of Ds-Psi, and series connections of Ds-Psi sensors were investigated by analyzing the electrical resistance of porous layer at different vacuum pressures. The value of vacuum was sensed by changing the electrical resistance value of DsPsi after removing gas particles from the porous structures, thus the resistance gradually decreased after the vacuum value exceeded 10-5 mbar. The Ds-Psi sensor with series connections showed higher sensitivity than the other sensors

Photo electrochemical etching (PECE) technique was used to prepare porous silicon (PSi) samples from n-type silicon with (111) orientation. The first group of samples was prepared at different etching current density (8, 12, 16 and 20) mA/cm2 with fixed etching time and laser intensity, while the second group was prepared at different laser intensity (10, 15, 20 and 25) mA/cm2 with fixed etching time and current density. The porous silicon surface was modified by deposition of pure titanium and titanium doping with silver using pulsed laser deposition technique (PLD) to improve the gas sensing performance of these modified surfaces. Different silver concentrations of (0.5, 1.5, and 2.5) % were used. Morphological and structural features of the TiO2/PSi & TiO2:Ag/PSi nanostructures were investigated using scanning electron microscopy (SEM), Energy Dispersive Spectroscopy (EDS), and X-ray diffraction (XRD) analysis. The XRD measurements demonstrated a strong peaks which were attributed to the porous silicon PSi, silver element has been attributed to the cubic silver nanoparticles and the detected characteristic peaks of TiO2 which led to the formation of tetragonal TiO2 (Rutile) nanoparticles. SEM images revealed that PSi surface morphology were pore-like structures. An increase in the pore diameter was observed with the increase of the current density and the intensity of the laser illumination in the PECE process. Similarly, SEM images and EDS analysis of TiO2/PSi and TiO2:Ag/PSi nanostructures confirmed the presence of TiO2 and Ag elements with different proportions, sizes, and shapes. The nanoparticles of TiO2 and TiO2:Ag structures were distributed in the form of single particles and in agglomerations around and inside the pores. The sensitivity properties of gas sensors for TiO2/PSi and TiO2:Ag/PSi nanostructures were studied. It showed improvements in sensitivity, response time, and recovery time of porous silicon as gas sensors. This is because of the high porosity, large surface area, and the small size of the TiO2:Ag structure which acted as a captures of gas molecules.The prepared sensors sensing features, such as sensitivity, response, and recovery time, have been implemented for two gases which were reducing gas (H2S with 50 ppm concentration), and an oxidizing gas (NO2 at concentration of 125 ppm). The test was performed with different operation temperatures ranging from room temperature to 200°C. Finally, the results of this study, particularly those related to gas-sensing characteristics, demonstrated that PSi enhanced by the deposition of TiO2 pure and Ag doped TiO2 provided an efficient gas-sensing developed to operate at room temperature in a relatively simple technique and inexpensive methods, and that the highest sensitivity appeared to NO2 gas at room temperature, which amounted to 93%

Cancer is the most common disease in the world and it has many traditional treatment methods. The targeted therapy method by nanocarriers is the more prefer and not harmful method for human. In this study, nanocrystalline Fe3O4 NPs were synthesized by using pulsed laser ablation in liquid. Using different Nd: YAG laser wavelengths (1064, 532 nm) and fluencies (10, 32 J/cm2 ) for each wavelength. The optical properties and the structure of the created nanoparticles were studied. These nanoparticles were characterized via employing UV-Visible absorption spectra, Fourier transforms infrared (FT-IR), Dynamic light scattering (DLS), Scanning electron microscope (SEM), atomic force microscopy and X-ray diffraction (XRD). Also in this work, Folate (FA) grafted dextran (DEX) coated superparamagnetic iron oxide nanoparticles (SPIONs) were prepared and used as a nanocarrier for Ellipticine (ET) delivery in cervical cancer in vitro. Fluorescence microscopy was utilized to evaluate the cell’s internalization ability. The suitable impact of a therapeutic dose of (SPION@DEX-ET-FA) for both cancer and healthy cell lines was estimated by using MTT assay (3-(4,5-dimethylthiazol-2-yl)- 2,5-diphenyltetrazolium bromide). The flowcytometry assay and real time PCR studies were carried out to evaluate the induction of apoptosis and changes in Bax and Bcl-2 gene expression in Hela cervical cancer cells. The obtained results exhibited the producing of Fe3O4 nanoparticles having a narrow size distribution with an average size of 24±6.13 nm. The findings of the formulated SPION@DEX-ET-FA were spherical particles with average size, polydispersity, and zeta potential of 101±15.02 nm, 0.075, and, -33.8 mV, respectively. In addition, these nanoparticles (NPs) manifested a high efficiency of drug encapsulation (~73 percent). The nanoparticles demonstrated a continuous release of ET at 37°C in acidic pH. Apoptosis was calculated by Annexin-V/Propidium flow cytometry after the cancer cells treatment with SPION@DEX-ET-FA. The potential of SPION@DEX-ET-FA to upregulate Bax/Bcl-2 ratio apoptotic genes in the Hela cells was also confirmed by real-time polymerase chain reaction results. The florescence microscopy confirmed that SPION@DEX-ET-FA was able to effectively penetrate the cancer cells. The results exhibited that SPION@DEX-ETFA retained antitumor activity, and no adverse effects for healthy cells were foun

The current study aim is examining the (PbI2, CH3NH3I) that was deposited on porous silicon (n-Psi), Porous-silicon nanostructure has beenprepared in this scheme via a Photo Electrochemical (PEC) iodization method. N-type silicon-wafer of resistivity (10Ω.cm) in hydrofluoric acid (HF) of 24% attention at fixed etching time (8 min), and changing the current density (10, 14 and 18) mA/cm2 . A laser light with a strength of 20W/cm2 and a wavelength of 645 nm was used to incinerate the surface. Using two consecutive depositing processes, successful preparation of perovskite thin films was achieved. The initial stage was making thin sheets of lead iodide (PbI2) fabricated by thermal evaporation technique. PbI2 films of 200 nm thickness were deposit on a cleaned glass and Psi substrate by the thermal evaporation method at a 10-5 Torr vacuum using a high vacuum coating apparatus (Edwards type E306A). The distance linking the source and the substrate was roughly 18 cm inside the vacuum chamber, where a molybdenum boat was utilized to transport PbI2 powder. The second step was transforming PbI2 thin films. The three-dimensional perovskite was made by dissolving 4.2227 g of MAI in 20 ml of 2-propanol and then the solution was stored in a dry box under N2 pressure. Dipping the PbI2 films was done by using MAI sol (methylammonium iodide-2-propanol) and thereafter turned black, showing the composition of the CH3NH3PbI3 surface layer, with a dipping period of 10 minutes for each sample. The resulting perovskite films CH3NH3PbI3 were black in color and regular. The structural properties of the prepared thin films studied with X-ray diffraction, The PbI2.X-ray diffraction showed that the PbI2 film has a hexagonal polycrystalline structure, while the CH3NH3PbI3 thin films, show a tetragonal-phase lead iodide perovskite. FE-SEM images showed porous silicone in Photo-electrochemical etching, the pore distribution is irregular and the pore refers to the increased surface area of the silicon. SEM images of pbI2 film showed that particles became scattered and resembled gravel in size. The estimated optical energy value of thin films of PbI2 was 3.3 eV. PbI2 film has lower transmittance values at short wavelengths, but as the wavelength increased, the transmittance values gradually increased. The greatest transmittance value was 88%. From FTIR analysis, chemical bonds were determined between porous silicon and PbI2.

This study demonstrates the use of an Nd: YAG laser to generate of TiO2 NPs, and TiO2@MWCNTs nanocomposites. The first one was carried out by laser ablation of Ti target immersed in de-ionized water at different laser fluence, while the second one was achieved by irradiating of a mixture TiO2 colloidal and carbon nanotubes with different concentration ratios. Several investigations were done for specimen characterization. The FTIR results have successfully proven the formation of TiO2NPs and TiO2@MWCNTs nanocomposites. Raman spectra showed the phase crystalline of pure TiO2 NPs and TiO2@MWCNTs nanocomposites contain two main phases anatase and brookite. These results were also affirmed by XRD patterns. The FE-SEM images clearly showed that the TiO2NPs crystals with a cauliflower-like shape structure. While FE-SEM images of TiO2@MWCNTs nanocomposites showed high-quality coverage of the TiO2NPs along the MWCNTs with nest-like shape and with a minimal TiO2NPs agglomeration. TEM investigations demonstrated that the TiO2NPs have semispherical shapes with particle sizes in the range (2-75) nm. While for TiO2@MWCNTs nanocomposite, the TEM images revealed that there are two types of nanocomposites CNTs and TiO2NPs are present, the first type is the TiO2NPs that are attached to the walls of MWCNTs, and the second type is TiO2NPs were completely covered by graphene sheet and it is hardly to distinguish TiO2NPs. Optical properties showed that the TiO2 colloidal have a high absorptance at the UV region and an energy gap ranging from 3.85 to 3.4 eV depending on laser fluence. While the spectra of TiO2@MWCNTs nanocomposite showed extension to long wavelengths with bandgap energy ranging from 3.45 to 3.35 eV. The PL of TiO2 NPs showed a broad intense band in the UV-visible light range (∼350–550 nm) which decreased with increasing laser fluence. The PL results of TiO2@MWCNTs nanocomposites showed a quenching of titanium luminescence spectra. The zeta potential values were increase with the increase of the laser fluence of ablation, and the concentration ratio of MWCNTs, respectively. As a result of this research, the pulsed laser ablation in liquid is a suitable method to prepare nanomaterial structures with different shapes and sizes which makes it’s a promising candidate to apply in different applications.

The laser induced breakdown spectroscopy (LIBS) is one of the most important analytical techniques , where a suitable energy laser is used to generate plasma from targets and the spectra emitted from it are analyzed by spectroscopy . In this study, a Nd:YAG laser with a wavelength of (1064 nm), a pulse duration of (9 ns) and energies of (500 - 600 - 700 - 800) miliJoule was used to generate the spectra of plasma from the materials (zinc, copper and titanium oxide) were observed in their nano and bulk states. The spectral study was conducted and monitored in the visible region with a range (300 - 750 nm) and under atmospheric pressure. The plasma parameters have been calculated, which are the temperature of the electrons (Te) and the density of electrons (ne) . From the results, the Debye length (λd) and the plasma frequency (Fp) were calculated . The plasma temperature (Te) was calculated using the Boltzmann plot method, and the electron density (ne) using the Stark broadening method . The results were that the intensity of the spectral lines (I) , the temperature (Te), the density of electrons (ne), and the plasma frequency (Fp) increase with the increase in the laser energy. the Debye length (λd) decreases with the increase in the laser energy. It has been observed that the value of intensity of the spectral lines (I) , the temperature of electrons (Te), the density of electrons (ne) and the plasma frequency (Fp) of nanomaterials are greater than that of bulk materials, and that the Debye length (λd) of nanomaterials is less than the bulk materials and at the same laser energy. The results of synthetic tests were included in the research which are the results of X-ray diffraction (XRD) and images of the electronic scanning microscope (SEM) for nano and bulk materials.

In this study, silver oxide (Ag₂O) .thin films have been successfully prepared on glass and silicon substrates employing chemical .bath .deposition (CBD) .technique. Different .concentrations of triethanolamine (Known as TEA) (C6H15NO3) (2.5, 5, 7.5, and 10( ml, and different reaction time (0.5, 1and 1.5) hr with different reaction temperature was (25, 50,75 and 100) Cº. Structural, optical, electrical .properties were studied to determine the optimum conditions of the deposited silver oxide film in order to prepare device for P and n-type silicon. . substrates. The X.R.D analysis shows that all that Ag₂O thin films are cubic. structure with preferred .orientation at (200). FESEM .image shown a .formation of uniform. and .homogeneous crystal .grains of Ag₂O thin films and , the grain size increased with increasing of TEA .concentration. The elements.. ratios of prepared. thin films have. been diagnostic by the (EDS) measurement which revealed the formation of a .stoichiometric. film at TEA 2.5 ml. The roughness. and average. grain. Size and .RMS of the silver .oxide found to be (1.46,3.49and1.7) nm at TEA 2.5 ml, respectively. From the optical properties the values of the .direct. energy band. gap. was estimated and found to range. from (1.65-2.29) eV concentrations of TEA. The properties. of the hetrojunction. device. indicated that device had a good. . rectification. The ideality. factor (n) found to be (2.6, 3.36) for p and n-type .silicon .substrates, respectively.. The C-V characteristics demonstrate that the builtin potential (Vbi) is (0.7) for A.g₂O/n-Si and (0.2) eV for Ag₂O/p-Si. The .detectivity. was estimated for the hetrojunction detector and found (5.5*109) cm. Hz1/2 .W-1 for Ag₂O /p-Si and (3.9*109) cm. Hz1/2 .W-1. for A.g₂O/n-Si.

In this research, Zinc oxide nanoparticles have been synthesized by pulsed laser ablation (PLA) in deionized water (DIW) using different numbers of pulses. Then, it was doped with aluminum at different doping ratio using 1064 nm wavelength of NdYAG laser and constant fluence 15.48 J/cm2 . Fourier transform infrared spectroscopy (FTIR) confirmed the formation of ZnO NPs and the absorption peaks of AZO NPs. X-ray diffraction (XRD) measurement proved that the presence of the cubic structure of ZnO NPs and the formation of AZO NPs suspension. The UV-Vis absorption spectra of ZnO and AZO NPs have exhibited increasing the absorbance intensity with increasing the absorbance intensity with an increase in the number of laser pulses. While Photoluminescence (PL) analysis for ZnO and AZO NPs demonstrated two emission peaks, one of which is strong in the UV region, and the other is weak located in the visible region. Morphological properties have been examined by scanning electron microscope (SEM) and energy dispersive spectroscopy (EDs). SEM images for ZnO NPs showed that the shapes of nanoparticles change to nano-wires and small agglomerated spherical nanoparticles. And AZO SEM images showed that the shape is modified from nano-wire to spherical particles with a high particles agglomeration. EDS peaks spectrum showed that all the peaks were corresponded associated with the peaks of (Zn, O, and Al) atoms. Biomedical applications were antibacterial activity for ZnO and AZO NPs; they were carried out against two types of bacteria: (S.aureus) and (E.coli). Using two methods firstly, by liquid medium method, for pure ZnO NPs with concentration (66.6, 133.3, 200, 266.6, 333.3) ????g/ml and (0.2, 0.27, 0.33, 0.42) % doping ratio for AZO, for both NPs effectiveness against S. aureus more than E. coli, and increases with increasing doping ratio. Secondly, by agar solid medium this illustrated from (IZ) diameters, which showed the same the previous results obtained from liquid medium method. Antiparasite activity and Anti-breast cancer activity were measured by MTT assay and micrographic image to calculate the growth of inhibition rate with concentration for pure ZnO NPs was (66.6, 133.3, 266.6) ????g/ml and all concentration of AZO NPs. which indicated that the activity of both NPs was more effective on L. tropica than L. donovani. While anti-cancer activity reveals that AZO, NPs were more effective on breast cancer than pure ZnO NPs.

In this work Perovskite thin films, were prepared successfully using two sequential deposition process. The first step was preparing lead iodide thin films (PbI₂) with spin coating technique on a glass substrate for (15s) and (1500 r.p.m). The second step was transforming PbI₂ thin films into perovskite thin films by dipping the PbI₂ samples in MAI solution in a glove box filled with N₂ gas for 15min then dipping it immediately in 2- propanol solution to rinse for (2s) and wait for the final thin films to dry. The structural properties of the prepared thin films studied with X-ray pattern measurements; PbI₂ thin films show a polycrystalline structure with hexagonal phase. While; the CH₃NH₃PbI₃ thin films, show a tetragonal phase and found that the PbI₂ is completely transformed into CH₃NH₃PbI₃ from observing the peaks of both thin films. the morphology of the thin films were studied using FESEM images and AFM spectroscopy, FESEM images shows PbI₂ thin films look inhomogeneous and dense, with a lot of pores, while the CH₃NH₃PbI₃ look like an island with high density and non-uniformed. While AFM microscopy for PbI₂ thin films shows, the value of RMS was (14.89 nm), while for MAPbI₃ thin films the RMS value was (34.27nm) The energy bandgap was calculating by the transmittance and absorbance measurements, for PbI₂ thin films the bandgap value was 2.45eV, while the perovskite was 1.65-1.80eV also by using diffused reflectance measurements, the band gap value found to be equal to the bandgap value from the optical measurements. By using FTIR measurements, the PbI₂ thin films observed completely transformed into perovskite, with different vibrations patterns for each resulted thin films. Raman spectroscopy shows that both resulted thin films have two vibrational modes, symmetric and asymmetric vibrational modes with different peaks for both materials.These measurements have been characterized on this work are suitable for solar cell applications.

In this study, Copper doped Cobalt Oxide (Cu:Co3O4) thin films have been successfully deposited on glass and silicon substrates by chemical spray pyrolysis (CSP) technique. Different concentrations of Cu (0, 1, 3, 5, 7, 9) % were used and the substrate temperature was (350 ±5 oC). Structural, Optical, Electrical and Optoelectronic properties of thin films have been investigated by using XRD, EDS, SEM, AFM, UV-Visible spectroscopy, R-T, Hall effect, I-V, C-V and Rλ measurements. The XRD analysis reflect that all films are cubic spinal structure and a polycrystalline in nature with preferred orientation was along (111) plane. The crystallite size of the samples was maximum (34,924nm) for the unopded Co3O4 thin film, and the minimum at concentration 5% which be (30.816nm). SEM shows that the surfaces of thin films affected with Cu doping and have semi- uniform homogenous structure. The element ratio and Cu concentrations of prepared thin films have been diagnostic by EDS measurement which clarify identification with the experimental ratio. Roughness, average grain size, RMS for Copper-Cobalt Oxide were varied with Cu concentration, the minimum values was at concentration 5% of Cu. The optical properties were measured by using transmission spectra in the wavelength (300- 1100) nm. The transmittance of all thin films increase slowly with wavelength at the range (300-750) nm, and then increased rapidly at higher wavelengths. The absorption coefficient changed with Cu, and the highest one was at ratio 7%. Two optical energy gap were investigated and they decreased with increasing doping concentration. The direct band gap values ranges between (1.4-2.06) eV, and the indirect band gab ranged between (1.32-1.92) eV. The extinction coefficient decreased as the wavelength increasing. It has been found that the electrical resistivity was decreased with increasing of Cu concentration. The activation energy decreased with increasing doping concentrations and ranging from (0.128-0.366) eV. Hall Effect measurement proved that all films were p-type. p- n heterojunction properties have been studied by I-V characteristic which indicated that the films have a good rectifying. The smallest value of ideality factor (n) at 7% and built-in potential (Vbi) were at ratio 9%. The peaks of responsivity, specific detectivity and quantum efficiency increased with increasing Cu concentration.