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Optical and electrical properties of amorphous Sb2S3 thin films: Effect of the film thickness‏

Research Abstract

The antimony tri-sulphide (Sb2S3) films were prepared by thermal evaporation technique. Four thicknesses (300, 521, 643 and 789 nm) were investigated. X-ray diffraction (XRD) analysis showed the amorphous structure of Sb2S3 films. Optical analyses revealed that Sb2S3 films exhibited optical energy gap between (1.98–1.16 eV) relaying on the film thickness. The films absorption coefficient was found to be higher than 2 × 104 cm−1(above its related optical energy gap) which makes these films reliable absorbers in photovoltaic applications. Optical constants were analyzed using Swanipole's method. The dark dc conductivity measurements of Sb2S3 thin films were conducted in the temperature range 298–503 K. The conduction mechanize was analyzed via Mott's variable -range hopping in three dimensions model. The correlated conductivity mechanize with increasing film thickness changed from extended

Research Authors
مصطفى إبراهيم عبدالرحمن بودى
Research Date
Research Department
Research Journal
North-Holland
Research Year
2021

Antimicrobial activity of silver-carbon nanoparticles on the bacterial flora of bull semen

Research Abstract
The spermicidal effects of silver nanoparticles (AgNPs) hinder its application in the field of artificial insemination. In this study, silver-carbon NPs (Ag@C NPs) was synthesized and applied as an alternative antibiotic agent for bull semen extender. Ag@C NPs were characterized using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), atomic absorption flame spectroscopy, transmission electron microscope (TEM), and high-resolution TEM (HR-TEM). Data analysis revealed the successful synthesis of Ag@C NPs with a particle size of 1-5 nm (average particle size of 2.5 nm) embedded into carbon. The antimicrobial activity of Ag@C NPs was tested against bacteriospermia of fresh semen collected from five fertile bulls (three ejaculates/bull). Escherichia coli (E. Coli), Staphylococcus aureus (S. aureus), and Pseudomonas aeruginosa (P. aeruginosa) were isolated from fresh semen samples and identified by culture, staining, and conventional biochemical tests. The minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) of Ag@C NPs against bacteriospermia was determined at 5 and 37 ºC. Ag@C NPs showed efficient antimicrobial activity (MIC: 3.125 - 12.5 μg/mL) against the tested strains and strong bactericidal effect on S. aureus, and P. aeruginosa (MBC: 3.125 μg/mL), with no detrimental effect (P ˃ 0.05) on the percentage of sperm motility (70.71±4.82; 74.65±4.46), plasma membrane integrity (68.39±4.31; 72.38±4.91), acrosome integrity (88.40±13.21; 86.77±14.23), and normal sperm morphology (86.85±7.43; 87.82±8.15) at concentrations of 15 and 30 μg/mL, respectively, after a cold storage of 48 h. However, Ag@C NPs showed a detrimental effect on sperm parameters in a dose dependent manner at concentrations ≥60 μg/mL. Ag@C NPs showed no adverse effect on the sperm´s ultrastructure with limited sperm internalization at MIC. In conclusion, Ag@C NPs could be used as an alternative antibiotic agent for bull semen extender without a significant cytotoxic effect on the sperm during cold storage. However, further investigations for their effects on embryo production and female genitalia are still required.
Research Authors
MS Yousef, Hani Nasser Abdelhamid, M Hidalgo, R Fathy, L Gómez-Gascón, J Dorado
Research Journal
Theriogenology
Research Pages
NULL
Research Publisher
Elsevier
Research Rank
1
Research Vol
NULL
Research Website
https://www.sciencedirect.com/science/article/pii/S0093691X20306385
Research Year
2020

GIS-based numerical modeling for the groundwater assessment: a case study in the Quaternary aquifer, Assiut Governorate, Egypt

Research Abstract
NULL
Research Authors
Sefelnasr, A, Omran, A, Hassan A, El Tahawy, W
Research Journal
Arabian Journal of Geosciences
Research Pages
624
Research Publisher
SPRINGER
Research Rank
1
Research Vol
12(20)
Research Website
NULL
Research Year
2019

Edaravone and Acetovanillone Upregulate Nrf2 and PI3K/Akt/mTOR Signaling and Prevent Cyclophosphamide Cardiotoxicity in Rats

Research Abstract
Introduction: Cyclophosphamide (CP) causes redox imbalance and its use is associated with marked cardiotoxicity that limits its clinical applications. The present study investigated the protective effects of acetovanillone (AV) and edaravone (ED) against CP-induced oxidative stress and cardiac damage, emphasizing the role of PI3K/Akt/mTOR and Nrf2 signaling. Materials and Methods: Rats received either AV (100 mg/kg) or ED (20 mg/kg) orally for 10 days and CP (200 mg/kg) on day 7. At day 11, the rats were sacrificed, and samples were collected for analysis. Results: AV and ED ameliorated serum troponin I, CK-MB, LDH, AST and ALP, and prevented cardiac histological alterations in CP-intoxicated rats. Both treatments decreased cardiac lipid peroxidation and enhanced GSH, SOD and cytoglobin in CP-induced rats. AV and ED downregulated Keap1, whereas increased the expression of PI3K, Akt, mTOR and Nrf2 in the heart of rats received CP. Additionally, the binding modes of AV and ED to Keap1 were pinpointed in silico using molecular docking simulations. Conclusion: AV and ED prevent CP cardiotoxicity by attenuating oxidative stress and tissue injury, and modulating cytoglobin, and PI3K/Akt/mTOR and Keap1/Nrf2 signaling. Therefore, AV and ED may represent promising agents that can prevent cardiac injury in patients receiving CP.
Research Authors
Emad HM Hassanein, Omnia AM Abd El-Ghafar, Marwa A Ahmed, Ahmed M Sayed, Wail M Gad-Elrab, Jamaan S Ajarem, Ahmed A Allam, Ayman M Mahmoud
Research Journal
Drug Design, Development and Therapy
Research Pages
5275-5288
Research Publisher
NULL
Research Rank
1
Research Vol
14
Research Website
NULL
Research Year
2020

A stability result for the solutions of a certain fourth-order vector differential equation with delay

Research Abstract
NULL
Research Authors
Maher, A. , Taie, R. O. and Alwaleady, M. G. A.
Research Journal
Assiut Uniu. J. of Mathematics and Computer Science
Research Pages
91-109, 2019
Research Publisher
NULL
Research Rank
1
Research Vol
48(2)
Research Website
NULL
Research Year
2019

Color face recognition using novel fractional-order multi-channel
exponent moments

Research Abstract
Color face recognition has more attention recently since it considered one of the most popular biometric pattern recognitions. With a considerable development in multimedia technologies, finding a suitable color information extraction from color images becomes a hard problem. Several color face recognition methods have been developed. However, these methods still suffer from some limitations, such as increasing the number of extracted features, which leads to an increase in computational time. Besides, among those features some of them are redundant and irrelevant that will influence the quality of the recognition. Therefore, this paper presents a novel color face recognition method that depends on a new family of fractional-order orthogonal functions, which is called orthogonal fractional-order exponent functions. Then, using these functions as the basis functions of novel multi-channel orthogonal fractional-order exponent moments (FrMEMs), these novel descriptors are defined in polar coordinates over the unit circle and have many characteristics. A set of experimental series are performed using a set of well-known color face recognition and compared with other CFR techniques. Besides, a group of feature selection methods with different classifiers used to evaluate the number of extracted features is suitable or needs to be enhanced. Experimental results illustrate that the proposed method based on FrMEMs outperforms other CFR methods. As well as, the recognition rate doesn’t influence by reducing the number of features using different FS methods.
Research Authors
Khalid M. Hosny, Mohamed Abd Elaziz, Mohamed M. Darwish
Research Journal
Neural Computing and Applications
Research Pages
NULL
Research Publisher
Springer
Research Rank
1
Research Vol
NULL
Research Website
NULL
Research Year
2020

Effect of zinc oxide nanoparticles on broilers’ performance and health status

Research Abstract
The current study investigated the effects of zinc oxide nanoparticles (ZONPs) and oxytetracycline (OTC) supplementation on broilers’ behavior, performance, carcass quality, biochemical parameters, and intestinal microbial populations and birds’ response to Newcastle disease (ND) vaccine. A total of 336 seven-day-old IR broiler chicks were randomly allotted to six dietary treatments containing 0, 10, 20, 30 and 40 ppm ZONPs or 50 ppm OTC. Each diet was fed to 7 replicates (8 birds/pen). The results clarified that 10 ppm ZONPs significantly improved the body weight gain and feed conversion in comparison to the control. No changes in behavior were recorded. The 10 ppm and 30 ppm ZONPs and OTC significantly reduced the gizzard weight in comparison to the control. While, 10 ppm ZONPs significantly increased the spleen weight, and all ZONPs doses increased bursa weight in comparison to the control and OTC groups. 20 ppm ZONPs increased the eviscerated yield and edible yield in comparison to the control and OTC groups. 40 ppm ZONPs increased pH, reduced meat color and overall acceptability in comparison to the control. In addition, results revealed that the 20 ppm ZONPs increased Calcium (Ca), High density low cholesterol (HDL-C), reduced urea (UA) and triglyceride (TG). Also, 40 ppm ZONPs and OTC increased creatinine (Cr) and reduced ND-HI titer in comparison to the control. For microbial population, OTC group was significantly lower than ZONPs groups in the total anaerobic, aerobic and lactobacilli count. In conclusion, the dietary inclusion of ZONPs can be applied as antibiotic growth promoter substitutions in broilers’ diet. However, further investigations are still needed.
Research Authors
Usama T. Mahmoud, Hosnia S. Abdel-Mohsein, Manal A. M. Mahmoud, Omar A. Amen, Rasha I. M. Hassan, Ashraf M. Abd-El-Malek, Sohair M. M. Rageb, Hanan S. A. Waly, Aly A. Othman & Mohamed A. Osman
Research Journal
Tropical Animal Health and Production
Research Pages
12
Research Publisher
Usama T. Mahmoud, Hosnia S. Abdel-Mohsein, Manal A. M. Mahmoud, Omar A. Amen, Rasha I. M. Hassan, Ashraf M. Abd-El-Malek, Sohair M. M. Rageb, Hanan S. A. Waly, Aly A. Othman & Mohamed A. Osman
Research Rank
1
Research Vol
NULL
Research Website
NULL
Research Year
2020

Effect of zinc oxide nanoparticles on broilers’ performance and health status

Research Abstract
The current study investigated the effects of zinc oxide nanoparticles (ZONPs) and oxytetracycline (OTC) supplementation on broilers’ behavior, performance, carcass quality, biochemical parameters, and intestinal microbial populations and birds’ response to Newcastle disease (ND) vaccine. A total of 336 seven-day-old IR broiler chicks were randomly allotted to six dietary treatments containing 0, 10, 20, 30 and 40 ppm ZONPs or 50 ppm OTC. Each diet was fed to 7 replicates (8 birds/pen). The results clarified that 10 ppm ZONPs significantly improved the body weight gain and feed conversion in comparison to the control. No changes in behavior were recorded. The 10 ppm and 30 ppm ZONPs and OTC significantly reduced the gizzard weight in comparison to the control. While, 10 ppm ZONPs significantly increased the spleen weight, and all ZONPs doses increased bursa weight in comparison to the control and OTC groups. 20 ppm ZONPs increased the eviscerated yield and edible yield in comparison to the control and OTC groups. 40 ppm ZONPs increased pH, reduced meat color and overall acceptability in comparison to the control. In addition, results revealed that the 20 ppm ZONPs increased Calcium (Ca), High density low cholesterol (HDL-C), reduced urea (UA) and triglyceride (TG). Also, 40 ppm ZONPs and OTC increased creatinine (Cr) and reduced ND-HI titer in comparison to the control. For microbial population, OTC group was significantly lower than ZONPs groups in the total anaerobic, aerobic and lactobacilli count. In conclusion, the dietary inclusion of ZONPs can be applied as antibiotic growth promoter substitutions in broilers’ diet. However, further investigations are still needed.
Research Authors
Usama T. Mahmoud, Hosnia S. Abdel-Mohsein, Manal A. M. Mahmoud, Omar A. Amen, Rasha I. M. Hassan, Ashraf M. Abd-El-Malek, Sohair M. M. Rageb, Hanan S. A. Waly, Aly A. Othman & Mohamed A. Osman
Research Journal
Tropical Animal Health and Production
Research Pages
12
Research Publisher
Usama T. Mahmoud, Hosnia S. Abdel-Mohsein, Manal A. M. Mahmoud, Omar A. Amen, Rasha I. M. Hassan, Ashraf M. Abd-El-Malek, Sohair M. M. Rageb, Hanan S. A. Waly, Aly A. Othman & Mohamed A. Osman
Research Rank
1
Research Vol
NULL
Research Website
NULL
Research Year
2020

Effect of zinc oxide nanoparticles on broilers’ performance and health status

Research Abstract
The current study investigated the effects of zinc oxide nanoparticles (ZONPs) and oxytetracycline (OTC) supplementation on broilers’ behavior, performance, carcass quality, biochemical parameters, and intestinal microbial populations and birds’ response to Newcastle disease (ND) vaccine. A total of 336 seven-day-old IR broiler chicks were randomly allotted to six dietary treatments containing 0, 10, 20, 30 and 40 ppm ZONPs or 50 ppm OTC. Each diet was fed to 7 replicates (8 birds/pen). The results clarified that 10 ppm ZONPs significantly improved the body weight gain and feed conversion in comparison to the control. No changes in behavior were recorded. The 10 ppm and 30 ppm ZONPs and OTC significantly reduced the gizzard weight in comparison to the control. While, 10 ppm ZONPs significantly increased the spleen weight, and all ZONPs doses increased bursa weight in comparison to the control and OTC groups. 20 ppm ZONPs increased the eviscerated yield and edible yield in comparison to the control and OTC groups. 40 ppm ZONPs increased pH, reduced meat color and overall acceptability in comparison to the control. In addition, results revealed that the 20 ppm ZONPs increased Calcium (Ca), High density low cholesterol (HDL-C), reduced urea (UA) and triglyceride (TG). Also, 40 ppm ZONPs and OTC increased creatinine (Cr) and reduced ND-HI titer in comparison to the control. For microbial population, OTC group was significantly lower than ZONPs groups in the total anaerobic, aerobic and lactobacilli count. In conclusion, the dietary inclusion of ZONPs can be applied as antibiotic growth promoter substitutions in broilers’ diet. However, further investigations are still needed.
Research Authors
Usama T. Mahmoud, Hosnia S. Abdel-Mohsein, Manal A. M. Mahmoud, Omar A. Amen, Rasha I. M. Hassan, Ashraf M. Abd-El-Malek, Sohair M. M. Rageb, Hanan S. A. Waly, Aly A. Othman & Mohamed A. Osman
Research Journal
Tropical Animal Health and Production
Research Pages
12
Research Publisher
Usama T. Mahmoud, Hosnia S. Abdel-Mohsein, Manal A. M. Mahmoud, Omar A. Amen, Rasha I. M. Hassan, Ashraf M. Abd-El-Malek, Sohair M. M. Rageb, Hanan S. A. Waly, Aly A. Othman & Mohamed A. Osman
Research Rank
1
Research Vol
NULL
Research Website
NULL
Research Year
2020

Effect of zinc oxide nanoparticles on broilers’ performance and health status

Research Abstract
The current study investigated the effects of zinc oxide nanoparticles (ZONPs) and oxytetracycline (OTC) supplementation on broilers’ behavior, performance, carcass quality, biochemical parameters, and intestinal microbial populations and birds’ response to Newcastle disease (ND) vaccine. A total of 336 seven-day-old IR broiler chicks were randomly allotted to six dietary treatments containing 0, 10, 20, 30 and 40 ppm ZONPs or 50 ppm OTC. Each diet was fed to 7 replicates (8 birds/pen). The results clarified that 10 ppm ZONPs significantly improved the body weight gain and feed conversion in comparison to the control. No changes in behavior were recorded. The 10 ppm and 30 ppm ZONPs and OTC significantly reduced the gizzard weight in comparison to the control. While, 10 ppm ZONPs significantly increased the spleen weight, and all ZONPs doses increased bursa weight in comparison to the control and OTC groups. 20 ppm ZONPs increased the eviscerated yield and edible yield in comparison to the control and OTC groups. 40 ppm ZONPs increased pH, reduced meat color and overall acceptability in comparison to the control. In addition, results revealed that the 20 ppm ZONPs increased Calcium (Ca), High density low cholesterol (HDL-C), reduced urea (UA) and triglyceride (TG). Also, 40 ppm ZONPs and OTC increased creatinine (Cr) and reduced ND-HI titer in comparison to the control. For microbial population, OTC group was significantly lower than ZONPs groups in the total anaerobic, aerobic and lactobacilli count. In conclusion, the dietary inclusion of ZONPs can be applied as antibiotic growth promoter substitutions in broilers’ diet. However, further investigations are still needed.
Research Authors
Usama T. Mahmoud, Hosnia S. Abdel-Mohsein, Manal A. M. Mahmoud, Omar A. Amen, Rasha I. M. Hassan, Ashraf M. Abd-El-Malek, Sohair M. M. Rageb, Hanan S. A. Waly, Aly A. Othman & Mohamed A. Osman
Research Journal
Tropical Animal Health and Production
Research Pages
12
Research Publisher
Usama T. Mahmoud, Hosnia S. Abdel-Mohsein, Manal A. M. Mahmoud, Omar A. Amen, Rasha I. M. Hassan, Ashraf M. Abd-El-Malek, Sohair M. M. Rageb, Hanan S. A. Waly, Aly A. Othman & Mohamed A. Osman
Research Rank
1
Research Vol
NULL
Research Website
NULL
Research Year
2020
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