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Synthesis and reactions of 2-[α-(3,4-disubstituted phenacyl)-p-substituted styryl]-4H-3,1-benzoxazin-4-ones

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Chinese Journal of Chemistry 1996年第5期14卷 437-446页

作者： SOLIMAN,ahmed Youssef ATTIA,Ibrahim abd el-Mogoud SALEM,Moneer abdu Ibrahim SOLIMAN,el-Sayedahmed GABER,Adel Mohy el-Deen Science Department Faculty of TeachersP.O.Box 2313Al Hasa31982Saudi Arabia Faculty of Engineering Ain Shames UniversityEgypt Chemistry Department Faculty of ScienceAin Shames UniversityEgypt

Conversion ofβ-aroyl propionic acids into furanone derivatives(2)and benzoxazinone derivatives(3)for the study of the reactivity of these nucleus towards different nucleophilic and elec-trophilic reagents.

关键词： Synthesis reaction beuzoxazinone derivatives

Quantum Distribution Functions for Dusty Plasma in Saturn’s Rings by Using Curvilinear Coordinates

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International Journal of Astronomy and Astrophysics 2019年第2期9卷 115-132页

作者： Nagat abd el Rahman Hussein abd el-Rahim hassan ahmed Esraa Gamal Sayed Mathematics Department Faculty of Science Assiut University Assiut Egypt Mathematics Department Faculty of Science Al-Azhar University Assiut Egypt

This study aims to estimate the quantum Bogoliubov-Born-Green-Kirkwood-Yvon (BBGKY) hierarchy in curvilinear coordinates. We used the results to calculate the quantum binary and triplet distribution functions in curvilinear coordinates. The analytical form of the quantum distribution functions was obtained for dusty plasma in Saturn’s rings model. We use particles-in-cell (PIC) simulations to find a visualization of dusty three-component plasma phase space in curvilinear coordinates. Our results were compared with others.

关键词： Dusty Plasma Binary and Triplet Distribution Functions Three Component Plasma BBGKY Hierarchy

Is toxoplasmosis a potential risk factor for liver cirrhosis?

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Asian Pacific Journal of Tropical Medicine 2015年第10期8卷 768-775页

作者： Abeer abd el-Rehim el-Henawy ahmed abdel-Razik Sahar Zakaria Dina elhammady Niveen Saudy Manar Sobh Azab Department of Medical Parasitology Faculty of MedicineMansoura University Department of Tropical Medicine Faculty of MedicineMansoura University Department of Clinical Pathology Faculty of MedicineMansoura University

Objective:To document Toxoplasma gondii(***) antibody status in patients with liver disease,blood samples were taken from 180 hepatic patients and 180 healthy ***:Toxoplasma IgG antibody was detected using enzyme-linked immunosorbent assay and histopathological assessment of liver biopsy METAVIR score was ***:*** IgG antibodies were found in 32.8%of patients and in 22.2%of controls(P=0.02).Toxoplasma seropositivity was significantly associated with lymphadenopathy,history of blood transfusion and reflex impairment in *** hepatitis C virus(HCV)and chronic HCV-related cirrhosis groups compared to chronic HBV and chronic HBV-related cirrhosis groups expressed significantly higher prevalence of *** seropositivity(odds ratio(OR) =4;95%confidence interval(CI):1.3-12.6;P=0.013,OR=4.8;95%CI:1.5-14.9;P=0.006,respectively).Within the chronic HCV group,*** seropositivity significantly associated disease evolution as regards to METAVIR histopathological system for fibrosis and inflammation(OR=19.4;95%CI:2.3-165.2;P=0.0008,OR=0.29;95%CI:0.1-0.8;P=0.01,respectively).Albumin,international normalized ratio(INR) and platelets count were the laboratory parameters significantly altered in Toxoplasma-positrvc chronic HCV patients(P=0.00 l,0.03,0.04,respectively).Child-Pugh scoring for cirrhosis in chronic HCV group placed the majority of seropositive patient in class C with significant statistical difference compared to Child A reference group(OR= 0.08;95%67:0.01-0.5;P=0.003).Conclusions:Toxoplasma seropositivity was high in patients with cirrhosis and associated higher grades of inflammation and necrosis signifying disease evolution,suggesting that cirrhotic patients may thus form a risk group for toxoplasmosis.

关键词： Toxoplasma gondii HBV HCV Liver cirrhosis METAVIR

Serum ferritin in neonatal cholestasis: A specific and active molecule or a non-specific bystander marker?

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Hepatobiliary & Pancreatic Diseases International 2019年第2期18卷 173-180页

作者： Behairy el-Sayed Behairy Hatem abd-Alsattar Konswa Hanaa Talaat ahmed Dina Shehata el-Azab Nermin Mohamed Adawy Ahmad Mohamed Sira Department of Pediatric Hepatology Gastroenterology and Nutrition National Liver Institute Menofiya University Department of Pathology National Liver Institute Menofiya University

Background: Serum ferritin(SF) and consequently hepatic iron have long been considered important in liver fibrosis progression. They have been studied in different liver diseases with no previous reports in neonatal cholestasis(NC). This study aimed to measure SF in different etiologies of NC and investigate its relation to hepatic iron and fibrosis. Methods: SF was measured in 75 infants, including 50 with NC and 25 with sepsis. SF was compared between these two groups. Biochemical parameters, hepatic iron grades, and liver fibrosis and other histopathological characteristics and correlated with SF were assessed in NC group. Finally, a comparison between intrahepatic cholestasis and obstructive etiology was performed. Results: SF was elevated in NC(1598 ± 2405 ng/mL) with no significant difference from those with sepsis( P = 0.445). NC and sepsis constituted augmenting factors leading to more elevation of SF(2589 ± 3511 ng/mL). SF was significantly correlated with hepatic iron grades( r = 0.536, P ell transformation( P = 0.009) and hepatocyte swelling( P = 0.023) than those with obstructive etiology(672 ± 566 ng/mL) and their prevalent pathological findings of ductular proliferation( P = 0.003) and bile plugs( P = 0.002). SF was unrelated to the grade of liver fibrosis( P = 0.058). Conclusions: SF is non-specifically elevated in NC, with positive correlation to hepatic iron grades. SF ≥ 803.5 ng/mL can predict higher grades( ≥ grade 3) of hepatic iron. However, an active role of increased SF and hepatic iron in disease progression remains questionable.

关键词： Biliary atresia Liver fibrosis Hepatic iron grade Intrahepatic cholestasis Iron

Overlapping Shadow Rendering for Outdoor Augmented Reality

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Computers, Materials & Continua 2021年第5期67卷 1915-1932页

作者： Naira elazab Shaker el-Sappagh ahmed Atwan hassan Soliman Mohammed elmogy Louai Alarabi Nagham Mekky Faculty of Computers and Information Mansoura UniversityMansoura35516Egypt Universidade de Santiago de Compostela Santiago de Compostela15705Spain Faculty of Computers and Articial Intelligence Benha UniversityBenha13512Egypt Faculty of Computer Sciences and Information Technology Northern Border UniversityArarSaudi Arabia College of Computer and Information Systems Umm Al-Qura UniversityMeccaSaudi Arabiagham Mekky

Realism rendering methods of outdoor augmented reality(AR)is an interesting *** items in outdoor AR need advanced impacts like shadows,sunshine,and relations between unreal items.A few realistic rendering approaches were built to overcome this *** of these approaches are not dealt with real-time ***,the issue remains an active research topic,especially in outdoor *** paper introduces a new approach to accomplish reality real-time outdoor rendering by considering the relation between items in AR regarding shadows in any place during *** proposed method includes three principal stages that cover various outdoor AR rendering ***,real shadow recognition was generated considering the sun’s location and the intensity of the *** second step involves real shadow ***,we introduced a shadow production algorithm technique and shades through its impacts on unreal items in the *** selected approach’s target is providing a fast shadow recognition technique without affecting the system’s *** achieved an average accuracy of 95.1%and an area under the curve(AUC)of 92.5%.The outputs demonstrated that the proposed approach had enhanced the reality of outside AR *** results of the proposed method outperformed other state-of-the-art rendering shadow techniques’outcomes.

关键词： Augmented reality outdoor rendering virtual shadow shadow overlapping hybrid shadow map

Transient elastography compared to liver biopsy and morphometry for predicting fibrosis in pediatric chronic liver disease: Does etiology matter?

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World Journal of Gastroenterology 2016年第16期22卷 4238-4249页

作者： Behairy el-Sayed Behairy Mostafa Mohamed Sira Khaled Refat Zalata el-Sayed Ebrahem Salama Mohamed ahmed abd-Allah Department of Pediatric Hepatology National Liver Institute Menofiya University Department of Pathology Faculty of Medicine Mansura University

AIM: To evaluate transient elastography (TE) as a noninvasive tool in staging liver fibrosis compared with liver biopsy and morphometry in children with different chronic liver ***: A total of 90 children [50 with chronic hepatitis C virus (HCV), 20 with autoimmune hepatitis (AIH) and 20 with Wilson disease] were included in the study and underwent liver stiffness measurement (LSM) using TE. Liver biopsies were evaluated for fibrosis, qualitatively, by Ishak score and quantitatively by fibrosis area fraction (FAF) using digital image analysis (morphometry). LSM was correlated with fibrosis and other studied variables using spearman correlation. A stepwise multiple regression analysis was also performed to examine independent factors associated with LSM. Different cut-off values of LSM were calculated for predicting individual fibrosis stages using receiver-operating characteristic curve. Cut-off values with optimal clinical performance (optimal sensitivity and specificity simultaneously) were ***: The majority of HCV group had minimal activity (80%) and no/mild fibrosis (72%). On the other hand, the majority of AIH group had mild to moderate activity (70%) and moderate to severe fibrosis (95%) and all Wilson disease group had mild to moderate activity (100%) and moderate to severe fibrosis (100%). LSM correlated significantly with both FAF and Ishak scores and the correlation appeared better with the latter (r = 0.839 vs 0.879, P < 0.0001 for both). LSM discriminated individual stages of fibrosis with high performance. Sensitivity ranged from 81.4% to 100% and specificity ranged from 75.0% to 97.2%. When we compared LSM values for the same stage of fibrosis, they varied according to the different etiologies. Higher values were in AIH (16.15 ± 7.23 kPa) compared to Wilson disease (8.30 ± 0.84 kPa) and HCV groups (7.43 ± 1.73 kPa). Multiple regression analysis revealed that Ishak fibrosis stage was the only ind

关键词： Autoimmune hepatitis Chronic hepatitis C Liver fibrosis Liver stiffness Morphometry Pediatrics Transient elastography Wilson disease

Endoscopic stapedotomy: Merits and demerits

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Journal of Otology 2018年第3期13卷 97-100页

作者： Waleed Moneir ahmed Musaad abd el-fattah Eslam Mahmoud Mohamed elshaer Department of Otolaryngology Faculty of Medicine Mansoura University

This work is conducted in Mansoura University Hospitals,Egypt,to show the advantages and disadvantages of endoscopic stapedotomy in comparison to microscopic *** work described has not been published previously nor under consideration for publication *** authors declare that there is no conflict of *** study is a part of a master degree thesis submitted by Eslam Mahmoud as partial fulfillment for a master *** review board approval,Faculty of Medicine-Mansoura University,was obtained for the study(IRB:MS/15.09.49).

关键词： Mansoura University Hospitals Medicine-Mansoura University

Synthesis and evaluation of some new oxazolones and imidazolones as antioxidant additives for Egyptian lubricating oils

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Petroleum Science 2012年第3期9卷 389-399页

作者： ahmed el-Mekabaty Osman M.O.Habib Hussein M.hassan Evelin B.Moawad Department of Chemistry Faculty of ScienceMansoura University

Oxazolone derivative 2 was utilized as a key intermediate for synthesis of some new oxazolone and imidazolone derivatives. Reaction of oxazolone derivative 2 with diamines under different conditions afforded the corresponding imidazolone derivatives 3-8, respectively. Moreover, oxazolone 2 reacted with some heterocyclic amines in glacial acetic acid giving the corresponding imidazolone derivatives 9-14, respectively. Cyclocondensation of thiosemicarbazide with compound 2 in dry pyridine afforded compound 15. Addition of secondary amines to olefin double bond of compound 2 gave the corresponding addition products 16-19, respectively. Michael addition of compound 2 with some active methylene compounds afforded oxazolone derivatives 20-23, respectively. These prepared products were evaluated as antioxidant and corrosion inhibitors for gasoline lubricating oil and compounds 6a-e, 10 and 15 exhibited the highest antioxidant and anticorrosive activities. The effect of concentration of additives was studied to recommend the optimum concentration to be used. The results showed, for additive 15, 0.1 g for 1 L oil was the more effective concentration. Measurements for thermal analysis and of surface tension of oil after oxidation were also carried out.

关键词： Oxazolone imidazolone benzoimidazole surface tension thermal stability antioxidant additives.

Dye removal using some surface modified silicate minerals

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International Journal of Mining Science and Technology 2014年第2期24卷 183-189页

作者： Selim K.A. Youssef M.A. abd el-Rahiem F.H. hassan M.S. Central Metallurgical Research and Development Institute

The objective of this work is to study the efficiency of some surface modified phyllosilicate minerals （bentonite and glauconite） in the removal of dyes from textile waste water. It is found that complete dye removal was achieved by using 10-25g modified glauconite from solutions having a dye concentration of 10-50 mg/L. Adsorption data were modeled using Langmuir, Freundlich, Temkin and Dubinin-Radushkevich isotherms. Adsorption capacities and optimum adsorption isotherms were predicted by linear regression method. The analysis of experimental isotherms showed that Langmuir isotherm reasonably fit the experimental data in the studied concentration range for the adsorption of dye onto glauconite mineral surface where Freundlich isotherm fit the experimental data for the adsorption of dve onto bentonite mineral surface.

关键词： Glauconite Bentonite Dye removal Modified silicate minerals Adsorption