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Amin Amr, M. Amin, and A. Nawwar, "Does fluid restriction affect the image quality of skeletal scintigraphy ?", Iranian Journal of Nuclear Medicine, issue 21.2 , pp. 77-80., 2013.
•, A. H. K. A. M. E. - R. •M. E. - S. A. E. M. K. A. H. K. • • • •, "Diffusion-weighted MRI and fibroscan vs. Histopathology for assessment of liver fibrosis in chronic HCV patients: (Pilot study)", Egyptian Journal of Radiology and Nuclear Medicine, vol. Mar , 2015.
‎Radwan, N.M., N. A. Ahmed, and H. S. Abou ‘L Ezz, "Disturbances in amino acid neurotransmitters induced by mobile ‎ ‎ phone radiation in hypothalamus of young and adult albino ‎rats.‎", J.Union Arab Biol.Cairo,, vol. 27, issue A, pp. 73-91‎, 2007.
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Zumbrun, E. E., N. F. Abdeltawab, H. A. Bloomfield, T. B. Chance, D. K. Nichols, P. E. Harrison, M. Kotb, and A. Nalca, "Development of a murine model for aerosolized ebolavirus infection using a panel of recombinant inbred mice", Viruses, vol. 4, no. 12: Multidisciplinary Digital Publishing Institute, pp. 3468–3493, 2012. Abstract
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Zou, K., S. Zhu, M. R. Meselhy, C. Tohda, S. Cai, and K. Komatsu, "Dammarane-Type Saponins from Panax j aponicus and Their Neurite Outgrowth Activity in SK-N-SH Cells", Journal of natural products, vol. 65, issue 9: American Chemical Society, pp. 1288-1292, 2002. Abstract
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Zornberg, J. G., A. M. Morsy, B. M. Kouchaki, B. R. Christopher, D. Leshchinsky, J. Han, B. F. Tanyu, F. T. Gebremariam, P. Shen, and Y. Jiang, Defining the Boundary Conditions for Composite Behavior of Geosynthetic Reinforced Soil (GRS) Structures, , Washington, D.C., National Cooperative Highway Research Program (NCHRP), Transportation Research Board of the National Academies, 2018.
Zorkany, B. E., A. Mokbel, S. M. Gamal, I. Hmamouchi, and M. Dougados, "Does smoking afect level of seropositivity in RA? A post‑HOC global and inter‑country analysis of COMORA cohort", Rheumatology International, vol. 41, issue 4, pp. 699 - 705, 2021.
Zohir, R. M., and F. A. Omara, "Dynamic Task Scheduling Using Fuzzy Logic in Homogenous and Heterogeneous Distributed Memory Systems", The Fifth International Conference on Intelligent Computing anf Information Systems (CICIS2011), Cairo, Egypt, pp. 127-132, 2011.
Zohir, R. M., and F. A. Omara, "Dynamic Task Scheduling Using Fuzzy Logic in Homogenous and Heterogeneous Distributed Memory Systems", The Fifth International Conference on Intelligent Computing and Information Systems (CICIS2011), Faculty of Computer and Information, Ain Shams University, Egypt, pp. 127-132, 2011.
Zohair, G. A. M., M. M. Amer, A. EL-shemy, M.A.Bosila, and K. M. Elbayoumi, "Diagnosis and Molecular Identification of Virulent Infectious Bursal Disease in Naturally Infected Broiler Chickens.", IJPPR, vol. 7, issue 5, pp. 29-34 , 2017. diagnosis_and_molecular_identification_of_virulent.pdf
Ziade1, N., T. Arayssi, B. E. Zorkany, A. Daher, G. A. Karam, M. A. J. M. A. Mashaleh, A. Aiko, E. Alam, S. A. Emadi, M. A. Mashaleh, et al., "Development of an Educational Video for Self-Assessment οf Patients with RA: Steps, Challenges, and Responses", MEDITERRANEAN JOURNAL OF RHEUMATOLOGY, vol. 32, issue 1, pp. 66 - 73, 2021.
Zheng, W., J. - A. Park, A. M. Abd El-Aty, S. - K. Kim, S. - H. Cho, J. - M. Choi, H. Yi, S. - M. Cho, A. Ramadan, J. H. Jeong, et al., "Development and validation of modified QuEChERS method coupled with LC-MS/MS for simultaneous determination of cymiazole, fipronil, coumaphos, fluvalinate, amitraz, and its metabolite in various types of honey and royal jelly.", Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, vol. 1072, pp. 60-69, 2018 Jan 01. Abstract

Over the past few decades, honey products have been polluted by different contaminants, such as pesticides, which are widely applied in agriculture. In this work, a modified EN - quick, easy, cheap, effective, rugged, and safe (QuEChERS) extraction method was developed for the simultaneous quantification of pesticide residues, including cymiazole, fipronil, coumaphos, fluvalinate, amitraz, and its metabolite 2,4-dimethylaniline (2,4-DMA), in four types of honey (acacia, wild, chestnut, and manuka) and royal jelly. Samples were buffered with 0.2M dibasic sodium phosphate (pH 9), and subsequently, acetonitrile was employed as the extraction solvent. A combination of primary secondary amine (PSA) and C18 sorbents was used for purification prior to liquid chromatography-electrospray ionization tandem mass spectrometry (LC-ESI/MS-MS) analysis. The estimated linearity measured at six concentration levels presented good correlation coefficients (R)≥0.99. The recovery, calculated from three different spiking levels, was 62.06-108.79% in honey and 67.58-106.34% in royal jelly, with an RSD<12% for all the tested compounds. The matrix effect was also evaluated, and most of the analytes presented signal enhancement. The limits of quantification (LOQ) ranged between 0.001 and 0.005mg/kg in various samples. These are considerably lower than the maximum residue limits (MRL) set by various regulatory authorities. A total of 43 market (domestic and imported) samples were assayed for method application. Among the tested samples, three samples were tested positive (i.e. detected and quantified) only for cymiazole residues. The residues in the rest of the samples were detected but not quantified. We concluded that the protocol developed in this work is simple and versatile for the routine quantification of cymiazole, 2,4-DMA, fipronil, coumaphos, amitraz, and fluvalinate in various types of honey and royal jelly.

Zheng, W., J. - A. Park, A. M. Abd El-Aty, S. - K. Kim, S. - H. Cho, J. - M. Choi, M. Warda, J. Wang, J. - H. Shim, and H. - C. Shin, "Development and validation of a simple solid-phase extraction method coupled with liquid chromatography-triple quadrupole tandem mass spectrometry for simultaneous determination of lincomycin, tylosin A and tylosin B in royal jelly.", Biomedical chromatography : BMC, vol. 32, issue 4, 2018 Apr. Abstract

We have developed an analytical method for the determination of lincomycin, tylosin A and tylosin B residues in royal jelly using liquid chromatography-triple quadrupole tandem mass spectrometry analysis. For extraction and purification, we employed 1% trifluoroacetic acid and 0.1 m Na EDTA solutions along with an Oasis HLB cartridge. The target antibiotics were well separated in a Kinetex EVO C reversed-phase analytical column using a combination of 0.1% formate acid in ultrapure water (A) and acetonitrile (B) as the mobile phase. Good linearity was achieved over the tested concentration range (5-50 μg/kg) in matrix-matched standard calibration. The coefficients of determination (R ) were 0.9933, 0.9933 and 0.996, for tylosin A, tylosin B and lincomycin, respectively. Fortified royal jelly spiked with three different concentrations of the tested antibiotics (5, 10 and 20 μg/kg) yielded recoveries in the range 80.94-109.26% with relative standard deviations ≤4%. The proposed method was applied to monitor 11 brand of royal jelly collected from domestic markets and an imported brand from New Zealand; all the samples tested negative for lincomycin, tylosin A and tylosin B residues. In conclusion, 1% trifluoroacetic acid and 0.1 m Na EDTA aqueous solvents combined with solid-phase extraction could effectively complete the sample preparation process for royal jelly before analysis. The developed approach can be applied for a routine analysis of lincomycin, tylosin A and tylosin B residues in royal jelly.

Zheng, W., J. - A. Park, A. M. Abd El-Aty, S. - K. Kim, S. - H. Cho, J. - M. Choi, H. Yi, S. - M. Cho, A. Ramadan, J. H. Jeong, et al., "Development and validation of modified QuEChERS method coupled with LC-MS/MS for simultaneous determination of cymiazole, fipronil, coumaphos, fluvalinate, amitraz, and its metabolite in various types of honey and royal jelly.", Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, vol. 1072, pp. 60-69, 2018 Jan 01. Abstract

Over the past few decades, honey products have been polluted by different contaminants, such as pesticides, which are widely applied in agriculture. In this work, a modified EN - quick, easy, cheap, effective, rugged, and safe (QuEChERS) extraction method was developed for the simultaneous quantification of pesticide residues, including cymiazole, fipronil, coumaphos, fluvalinate, amitraz, and its metabolite 2,4-dimethylaniline (2,4-DMA), in four types of honey (acacia, wild, chestnut, and manuka) and royal jelly. Samples were buffered with 0.2M dibasic sodium phosphate (pH 9), and subsequently, acetonitrile was employed as the extraction solvent. A combination of primary secondary amine (PSA) and C18 sorbents was used for purification prior to liquid chromatography-electrospray ionization tandem mass spectrometry (LC-ESI/MS-MS) analysis. The estimated linearity measured at six concentration levels presented good correlation coefficients (R)≥0.99. The recovery, calculated from three different spiking levels, was 62.06-108.79% in honey and 67.58-106.34% in royal jelly, with an RSD<12% for all the tested compounds. The matrix effect was also evaluated, and most of the analytes presented signal enhancement. The limits of quantification (LOQ) ranged between 0.001 and 0.005mg/kg in various samples. These are considerably lower than the maximum residue limits (MRL) set by various regulatory authorities. A total of 43 market (domestic and imported) samples were assayed for method application. Among the tested samples, three samples were tested positive (i.e. detected and quantified) only for cymiazole residues. The residues in the rest of the samples were detected but not quantified. We concluded that the protocol developed in this work is simple and versatile for the routine quantification of cymiazole, 2,4-DMA, fipronil, coumaphos, amitraz, and fluvalinate in various types of honey and royal jelly.

Zheng, W., J. - A. Park, A. M. Abd El-Aty, S. - K. Kim, S. - H. Cho, J. - M. Choi, M. Warda, J. Wang, J. - H. Shim, and H. - C. Shin, "Development and validation of a simple solid-phase extraction method coupled with liquid chromatography-triple quadrupole tandem mass spectrometry for simultaneous determination of lincomycin, tylosin A and tylosin B in royal jelly.", Biomedical chromatography : BMC, 2017 Nov 22. Abstract

We have developed an analytical method for the determination of lincomycin, tylosin A and tylosin B residues in royal jelly using liquid chromatography-triple quadrupole tandem mass spectrometry analysis. For extraction and purification, we employed 1% trifluoroacetic acid and 0.1 m Na2 EDTA solutions along with an Oasis HLB cartridge. The target antibiotics were well separated in a Kinetex EVO C18 reversed-phase analytical column using a combination of 0.1% formate acid in ultrapure water (A) and acetonitrile (B) as the mobile phase. Good linearity was achieved over the tested concentration range (5-50 μg/kg) in matrix-matched standard calibration. The coefficients of determination (R2 ) were 0.9933, 0.9933 and 0.996, for tylosin A, tylosin B and lincomycin, respectively. Fortified royal jelly spiked with three different concentrations of the tested antibiotics (5, 10 and 20 μg/kg) yielded recoveries in the range 80.94-109.26% with relative standard deviations ≤4%. The proposed method was applied to monitor 11 brand of royal jelly collected from domestic markets and an imported brand from New Zealand; all the samples tested negative for lincomycin, tylosin A and tylosin B residues. In conclusion, 1% trifluoroacetic acid and 0.1 m Na2 EDTA aqueous solvents combined with solid-phase extraction could effectively complete the sample preparation process for royal jelly before analysis. The developed approach can be applied for a routine analysis of lincomycin, tylosin A and tylosin B residues in royal jelly.

Zeyada, Y., E. El-Beheiry, M. El-Arabi, and D. Karnopp, "Driver modeling using fuzzy logic controls for human-in-the-loop vehicle simulations", Current Advances in Mechanical Design and Production VII: Elsevier Science Ltd Oxford, 2000. Abstract
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Zeng, H., B. Wu, M. Zhang, N. Zhang, A. Elnashar, L. Zhu, W. Zhu, F. Wu, N. Yan, and W. Liu, Dryland ecosystem dynamic change and its drivers in Mediterranean region, , vol. 48: Elsevier, pp. 59 - 67, 2020. AbstractWebsite

This review describes the latest progress of dryland ecosystem dynamic change in the Mediterranean region. Recent findings indicate that extent of dryland in the Mediterranean region has been expanding in the past decades and will continue to expand in the coming decades due to the stronger warming effect than other regions. The warming trend with intensified human activities has generated a series of negative impacts on productivity, biodiversity, and stability of the dryland ecosystem in Mediterranean region. Increased population, overgrazing and, grazing abandonment intensified the land degradation and desertification. The coverage, richness, and abundance of biological soil crust have been reduced due to the decline of soil water availability and increased animals. Future studies are required to further our understanding of the process and mechanism of the dryland dynamics, including the identification of essential variables, discriminating human and climate-induced changes, and modeling future trajectories of dryland changes.

Zellagui, M., H. A. Hassan, and M. N. Kraimia, "DFIG wind turbine under unbalanced power system conditions using adaptive fuzzy virtual inertia controller", Energetika, vol. 65, issue 1, pp. 1-13, 2019. 3971-article_text-2932-1-10-20190515.pdf
Zekri Ael-R, N. A. A., E. - D. E. - R. MN, S. HI, and B. AB, "Disease Progression from Chronic Hepatitis C to Cirrhosis and Hepatocellular Carcinoma is Associated with Increasing DNA Promoter Methylation.", Asian Pac J Cancer Prev., vol. 14, issue (11), pp. 6721-6726, 2013.
Zekri, A. R., A. A. Nassar, M. N. Elrouby, H. I. Shousha, and A. B. Barakat, "Disease progression from chronic hepatitis C to cirrhosis and hepatocellular carcinoma is associated with increasing DNA promoter methylation", Asian Pac J Cancer Prev., vol. 14, issue 11, pp. 6721-6, 2014.
Zekri, A. R., A. A. Nassar, M. N. E. - D. El-Rouby, H.I.Shousha, A.B.Barakat, E.D.El-Desouky, N. A. Zayed, O.S.Ahmed, A. S. E. - D. Youssef, A. O. Kaseb, et al., "Disease Progression from Chronic Hepatitis C to Cirrhosis and Hepatocellular Carcinoma is Associated with Increasing DNA Promoter Methylation", Asian Pacific Journal of Cancer Prevention , vol. 14, issue 11, pp. 6721-6., 2013.
Zekri, A. R., A. A. Nassar, M. N. El-Rouby, H. I. Shousha, A. B. Barakat, E. D. El-Desouky, N. A. Zayed, O. S. Ahmed, and A. S. Youssef, "Disease Progression from Chronic Hepatitis C to Cirrhosis and Hepatocellular Carcinoma is Associated with Increasing DNA Promoter Methylation", Asian Pac J Cancer Prev, vol. 14, issue 11, pp. 6721-6726., 2014.
Zekri, A. - R. N., A. A. - M. Nassar, M. N. E. - D. El-Rouby, H. I. Shousha, A. B. Barakat, E. D. El-Desouky, N. A. Zayed, O. S. Ahmed, A. S. E. - D. Youssef, A. O. Kaseb, et al., "Disease Progression from Chronic Hepatitis C to Cirrhosis and Hepatocellular Carcinoma is Associated with Increasing DNA Promoter Methylation. ", Asian Pacific Journal of Cancer Prevention, vol. 14, pp. 6721-6726, 2013.
Zekri, A. - R. N., A. A. - M. Nassar, M. N. E. - D. El-Rouby, H. I. Shousha, A. B. Barakat, E. D. El-Desouky, N. A. Zayed, O. S. Ahmed, A. S. E. - D. Youssef, and A. O. Kaseb, "Disease progression from chronic hepatitis C to cirrhosis and hepatocellular carcinoma is associated with increasing DNA promoter methylation", Asian Pacific Journal of Cancer Prevention, vol. 14, issue 11: Asian Pacific Journal of Cancer Prevention, pp. 6721-6726, 2013. Abstract
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Zekri, A. - R. N., Z. K. Hassan, A. A. Bahnassy, H. M. Khaled, M. N. El-Rouby, R. M. Haggag, and F. O. U. A. D. M. ABU-TALEB, "Differentially expressed genes in metastatic advanced Egyptian bladder cancer.", Asian Pacific journal of cancer prevention : APJCP, vol. 16, issue 8, pp. 3543-9, 2015. Abstract

BACKGROUND: Bladder cancer is one of the most common cancers worldwide. Gene expression profiling using microarray technologies improves the understanding of cancer biology. The aim of this study was to determine the gene expression profile in Egyptian bladder cancer patients.

MATERIALS AND METHODS: Samples from 29 human bladder cancers and adjacent non-neoplastic tissues were analyzed by cDNA microarray, with hierarchical clustering and multidimensional analysis.

RESULTS: Five hundred and sixteen genes were differentially expressed of which SOS1, HDAC2, PLXNC1, GTSE1, ULK2, IRS2, ABCA12, TOP3A, HES1, and SRP68 genes were involved in 33 different pathways. The most frequently detected genes were: SOS1 in 20 different pathways; HDAC2 in 5 different pathways; IRS2 in 3 different pathways. There were 388 down-regulated genes. PLCB2 was involved in 11 different pathways, MDM2 in 9 pathways, FZD4 in 5 pathways, p15 and FGF12 in 4 pathways, POLE2 in 3 pathways, and MCM4 and POLR2E in 2 pathways. Thirty genes showed significant differences between transitional cell cancer (TCC) and squamous cell cancer (SCC) samples. Unsupervised cluster analysis of DNA microarray data revealed a clear distinction between low and high grade tumors. In addition 26 genes showed significant differences between low and high tumor stages, including fragile histidine triad, Ras and sialyltransferase 8 (alpha) and 16 showed significant differences between low and high tumor grades, like methionine adenosyl transferase II, beta.

CONCLUSIONS: The present study identified some genes, that can be used as molecular biomarkers or target genes in Egyptian bladder cancer patients.