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Zekri, A. - R. N. a, A. A. b Bahnassy, S. M. c Shaarawy, O. A. f Mansour, M. A. d Maduar, H. M. e Khaled, and O. f El-Ahmadi, "Hepatitis C virus genotyping in relation to neu-oncoprotein overexpression and the development of hepatocellular carcinoma", Journal of Medical Microbiology, vol. 49, no. 1, pp. 89-95, 2000. AbstractWebsite

The distribution of hepatitis C virus (HCV) genotypes among Egyptian patients positive for anti-HCV was determined and their influence, when combined with neu-oncoprotein overexpression, on the development of hepatocellular carcinoma (HCC) was examined. The study groups included asymptomatic carriers (ASC) and patients with chronic active hepatitis (CAH) and HCC. HCV genomes were detected in the sera of 27 ASC, 29 CAH and 33 HCC patients known to have HCV infection defined by EIA and recombinant immunoblotting techniques (Inno-LiA) as well as by reverse transcriptase (RT)-PCR. The HCV genotype was determined by a reverse hybridisation technique (Inno-LiPA I and II), whereas neu-overexpression was detected by the Oncogene Science EIA Kit. Eighty-nine patients were eligible for HCV genotyping; 75 patients (84.3%) were infected with a single genotype, including 1a in 11 patients (12.4%), 1b in 2 patients (2.2%) and 2a in 10 patients (11.2%). Genotype 4 (a or c + d) was detected in 51 patients (57.3%) and only one patient had genotype 10a (1.2%). Fourteen patients (15.7%) showed mixed infection; eight of them had 1a + 4 (a or c + d) and four had 2a + 4 (a or c + d); the remaining two cases had 1a + 2a and 1b + 2a. The results revealed an increased incidence of genotype 4 in CAH and HCC patients in comparison with ASC. There was also a significant overexpression of neu-oncoprotein in CAH and HCC patients compared with ASC, which was significantly associated with subtype 4 infection. The results suggest that infection with subtype 1a and 4 HCV may be considered a risk factor for the induction of neu-overexpression and subsequent development of HCC.

Zeid, F. A., "Hüttenkalk erhoht die standfestigkeit des Getreides.", Ein Einfluss seiner Kieselsaure Huttenkalk-Mitteilungen, pp. 38–Folge, 1970. Abstract
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Zeid, K. A. M., M. B. Mohamed, and S. M. El-Shall, "Hybrid Au-CdSe and Ag-CdSe Nanoflowers and Core-Shell Nanocrystals via One-Pot Heterogeneous Nucleation and Growth", Small, 2011. Abstract

A general approach, based on heterogeneous nucleation and growth of CdSe nanostructures on Au or Ag nanocrystals, for the synthesis of AuCdSe and AgCdSe hybrid nanostructures is developed. The new approach provides a versatile one-pot route for the synthesis of hybrid nanoflowers consisting of a gold or silver core and multipod CdSe rods or an intact CdSe shell with controlled thickness, depending on the nucleation and growth parameters. At lower growth temperatures such as 150 degrees C, the CdSe clusters are adsorbed on the surface of the metal cores in their surface defects, then multiple arms and branches form, resulting in nanoflower-shaped hybrid structures. Increasing the size of the metal core through the choice of the reducing and capping agents results in an improvement of the interface between the metal and CdSe domains, producing coreshell structures. The growth temperature appears to be the most important factor determining the nature of the interface between the metal and CdSe domains. At relatively high temperatures such as 300 degrees C, the formation of large, faceted Au cores creates preferential growth sites for the CdSe nanocrystalline shell, thus resulting in well-defined AuCdSe coreshell structures with large interfaces between the Au and CdSe domains. The present approach is expected to foster systematic studies of the electronic structures and optical properties of the metal semiconductor hybrid materials for potential applications in photovoltaic and nanoelectronic devices.

Zeid, F. A., "Hüttenkalk erhoht die standfestigkeit des Getreides.", Ein Einfluss seiner Kieselsaure Huttenkalk-Mitteilungen, pp. 38–Folge, 1970. Abstract
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Zayed, M., U. M. Fouda, S. M. Zayed, K. A. Elsetohy, and A. T. Hashem, "Hysteroscopic Myomectomy of Large Submucous Myomas in a 1-Step Procedure Using Multiple Slicing Sessions Technique.", J Minim Invasive Gynecol. 2015, vol. 22, issue 7, pp. 1196-202, 2015.
Zayed, M. A., W. H. Mahmoud, A. A. Abbas, A. E. Ali, and G. G. Mohamed, "A highly sensitive, selective and renewable carbon paste electrode based on a unique acyclic diamide ionophore for the potentiometric determination of lead ions in polluted water samples. ", RSC Advances, , vol. 10, issue 30, pp. 17552-17560, 2020.
Zayed, M., U. M. Fouda, S. M. Zayed, K. A. Elsetohy, and A. T. Hashem, "Hysteroscopic Myomectomy of Large Submucous Myomas in a 1-Step Procedure Using Multiple Slicing Sessions Technique", Journal of Minimally Invasive Gynecology,, vol. 22, issue 7, pp. 1196-1202, 2015. hysteroscopic_myomectomy_of_large_submucous_myomas_in_a_1-step_procedure_using_multiple_slicing_sessions_technique.pdf
Zawbaa, H. M., A. E. H. , and W. Y., E. Emary, "Hybrid flower pollination algorithm with rough sets for feature selection", IEEE iInternational Computer Engineering Conference - ICENCO , Cairo, 30 Dec, 2015.
Zawbaa, H. M., Eid Emary, A. E. Hassanien, and M. F. Tolba, "Hajj human event classification system using machine learning techniques", Hybrid Intelligent Systems (HIS), 2013 13th International Conference on: IEEE, pp. 191–196, 2013. Abstract
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Zawbaa, H. M., E. Emary, A. E. Hassanien, and M. F. Tolba, "Hajj human event classi cation system using machine learning techniques", 13th International Conference on Hybrid Intelligent Systems (HIS), Tunisia, 4-6 Dec., 2013.
Zawbaa, H. M., A. E. Hassanien, E. Emary, Waleed Yamany, and B. PARV, "Hybrid ower pollination algorithm with rough sets for feature selection", ICENCO2015, Cairo, Egypt, 29- 30 Dec, 2015.
Zawbaa, H. M., A. E. Hassanien, E. Emary, Waleed Yamany, and B. PARV, "Hybrid flower pollination algorithm with rough sets for feature selection", Computer Engineering Conference (ICENCO), 2015 11th International: IEEE, pp. 278–283, 2015. Abstract
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Zamzam, M., H. Zaid, R. Khedr, H. Hafez, A. Moussa, R. Samaha, S. Kamal, and S. Abouelnaga, "Healthcare Sciences Academy 57357 “Learning to Teach”: a real-life model for capacity building of health care professionals in developing countries", Blood Advances, vol. 1, issue Suppl, pp. 20-22, 2017.
Zamzam, M., H. Zaid, R. Khedr, H. Hafez, A. Moussa, R. Samaha, S. Kamal, and S. Abouelnaga, "Healthcare Sciences Academy 57357 “Learning to Teach”: a real-life model for capacity building of health care professionals in developing countries", Blood Advances, vol. 1, issue Suppl 1: The American Society of Hematology, pp. 20, 2017. Abstract
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Zamzam, S. M., H. M. Abdelkader, G. Subedi, and O. A. Alhossainy, "Hypovitaminosis D and its relationship to nasal polyposis", Pan Arab Journal of Rhinology, 2022.
Zamzam, M., H. Zaid, R. Khedr, H. Hafez, A. Moussa, R. Samaha, S. Kamal, and S. Abouelnaga, "Healthcare Sciences Academy 57357 “Learning to Teach”: a real-life model for capacity building of health care professionals in developing countries", Blood Advances, vol. 1, issue Suppl: American Society of Hematology, pp. 20-22, 2017. Abstract
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Zaky, H. H. M., and S. A. A. Abdel-Mowla, "Health Outcome Inequities and the Health System: A Case Study of Egypt", Research in World Economy, 2011. Abstract

The documentation of health outcome inequities between population groups and/or geographical areas is important to provide evidence for policy actions and for promoting health equity. This paper aims to support the development of a data base on health inequities, consisting of indicators based on aspects of the wider health system, including health inputs, process and outcome indicators. A framework for the health system indicators is used as well as equity measures are applied to highlight inequities in health outcomes and link them to inequities in the health system to answer the question of whether the health system in Egypt is pro-disadvantaged groups. It is found that health outcome inequities pose a challenge for Egypt. Analyzing both determinants and symptoms of health outcome inequities in Egypt demonstrates that the current health system does not help reduce such inequities; on the contrary it leads to increase them.

Zaki, C., "How Does Trade Facilitation Affect International Trade?", European Journal of Development Research, vol. 27, pp. 156-185, 2015.
Zaki, A. R., A. A. A. Khalaf, M. A. Ibrahim, A. M. Mekkawy, and P. A. Noshy, "Histopathological, immunohistochemical and molecular changes in the lung, heart and skin of drowned rats at different postmortem intervals.", International Journal of Medical Toxicology & Legal Medicine, vol. 24, pp. 34-48, 2021.
Zaki, M., M. M, H. Mohamed, H. E. Karaksy, H. Hossni, L. Seleim, A. E. Safty, and A. Oraby, "Hypermanganesemia, dystonia, polycythemia and cirrhosis in 10 new patients: Six novel SLC30A10 mutations and further phenotype delineation. ", Clinical Genetics, vol. 93, issue 4, pp. 905-912, 2018.
Zaki, M. S., M. Y. Issa, and H. M. Elbendary, "Hypermanganesemia with dystonia, polycythemia and cirrhosis in 10 patients: Six novel SLC30A10 mutations and further phenotype delineation", clinical genetics, vol. 93, issue 4, pp. 905-912, 2018.
Zaki, M. S., M. Y. Issa, H. M. Elbendary, H. El-Karaksy, H. Hosny, C. Ghobrial, A. El Safty, A. El-Hennawy, A. Oraby, L. Selim, et al., "Hypermanganesemia with dystonia, polycythemia and cirrhosis in 10 patients: Six novel SLC30A10 mutations and further phenotype delineation.", Clinical genetics, vol. 93, issue 4, pp. 905-912, 2018 Apr. Abstract

Biallelic mutations in the SLC30A10 gene cause an inborn error of Mn metabolism characterized by hypermanganesemia, polycythemia, early-onset dystonia, and liver cirrhosis (HMDPC). To date, only 14 families from various ethnic groups have been reported. Here, we describe 10 patients from 7 unrelated Egyptian families with HMDPC. Markedly elevated blood Mn levels, the characteristic basal ganglia hyperintensity on T1-weighted images, and variable degrees of extrapyramidal manifestations with or without liver disease were cardinal features in all patients. Eight patients presented with striking early diseased onset (≤2 years). Unexpectedly, early hepatic involvement before the neurological regression was noted in 3 patients. Mutational analysis of SLC30A10 gene revealed 6 novel homozygous mutations (c.77T > C (p.Leu26Pro), c.90C > G (p.Tyr30*), c.119A > C (p.Asp40Ala), c.122_124delCCT (p.Ser41del), c.780_782delCAT (p.Iso260del) and c.957 + 1G > C). Treatment using 2,3 dimercaptosuccinic acid as a manganese chelating agent showed satisfactory results with improvement of biochemical markers, hepatic manifestations and relative amelioration of the neurological symptoms. Our findings present a large cohort of patients with HMDPC from same ethnic group. The majority of our patients showed severe and early presentation with clear phenotypic variability among sibship. Moreover, we extend the phenotypic and mutational spectrum and emphasize the importance of early diagnosis and treatment of this potentially fatal disorder.

Zaki, A. R., A. A. A. Khalaf, Marwa A Ibrahim, A. M. Mekkawy, and P. A. Noshy, "Histopathological, immunohistochemical and molecular changes in the lung, heart and skin of drowned rats at different postmortem intervals", Histopathological, immunohistochemical and molecular changes in the lung, heart and skin of drowned rats at different postmortem intervals, vol. 24, issue 3 and 4, pp. 34-48, 2021.
Zakaria Abir, El-Mazny Ahmed, and H. Tarek, "Hepatopulmonary Syndrome Evaluation in Egyptian Patients with Portal Hypertension and Hepatitis C", Journal of American Science, vol. 7, issue 3, pp. 729-737, 2011.
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