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Highly efficient one-pot synthesis of dihydropyran heterocycles

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Chinese Chemical Letters 2014年第2期25卷 212-214页

作者： mohamed A.Ameen Sara M.Motamed Fathy F.abdel-latif Chemistry Department.Faculty of Science El Minia University

Diammonium hydrogen phosphate and potassium carbonate-catalyzed one-pot synthesis of 1,4- phenylene-bis（2-amino-4H-pyran-3-carbonitrile and 2-amino-4-aryl-4H-pyran-3-carbonitrile deriva- tives has been achieved by a three-component cyclocondensation of aldehydes, malononitrile, and different nucleophiles in aqueous medium in high yields.

关键词： One pot synthesis Diammonium hydrogen phosphate Pyran Aqueous media

Heterocyclization of thiocarbonohydrazides:Facile synthesis of 5-unsubstituted-1,3,4-thiadiazoles

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Chinese Chemical Letters 2015年第9期26卷 1183-1186页

作者： Alaa A.Hassan Fathy F.abdel-latif mohamed abdel Aziz Sara M.Mostafa Stefan Brse Martin Nieger Chemistry Department Faculty of ScienceMinia University Department of Medicinal Chemistry Faculty of PharmacyEl-Minia University Institute of Organic Chemistry Karlsruhe Institute of TechnologyFritz-Haber-Weg 676131 KarlsruheGermany Laboratory of Inorganic Chemistry Department of ChemistryUniversity of Helsinki

2-（Hydrazinecarbothioyl）-N-substituted hydrazinecarbothioamides react with 2,3,5,6-tetrachloro-1,4-benzoquinone in high yields in a novel fast and facile method to give 5-unsubstituted-1,3,4-thiadiazole-2-amine *** synthesized compounds were characterized by spectroscopic methods and confirmed by using X-ray crystallography.A rationale for the formation of the products is presented.

关键词： Thiocarbonohydrazides 5-Unsubstituted 1 3 4-thiadiazol-2-amines Tetrachloro-1 4-benzoquinone X-ray crystallography

General exact solution of the fin problem with variable thermal conductivity

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Propulsion and Power Research 2016年第1期5卷 63-69页

作者： Abass H.abdel Kader mohamed S.abdel latif Hamed M.Nour Engineering Mathematics and Physics Department Faculty of EngineeringMansoura UniversityMansoura 35516Egypt

In this paper,Lie point symmetry method is used to obtain the general exact solution of the second order nonlinear ordinary differential equation which goveming heat transfer in rectangular fin with variable thermal *** new forms of thermal conductivity are introduced and the associated exact solution is obtained in each *** general relation among the fin efficiency,thermal conductivity and thermo-geometric parameter is obtained.

关键词： Exact solution Fin Thermal conductivity Heat transfer Lie point symmetry

Chemoprevention of gastrointestinal cancers by natural honey

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World Journal of Pharmacology 2015年第1期4卷 160-167页

作者： mohamed MM abdel--latif Department of Clinical Pharmacy Faculty of PharmacyAssiut University

Gastrointestinal cancers are the most common human cancers in both men and women worldwide. Several epidemiological and experimental studies suggest a relationship between gastrointestinal cancers risk and dietary factors. Natural honey has been widely used in traditional medicine for many centuries to treat a wide range of ailments and complaints. Honey contains various components that exhibit wide activities including antibacterial, anti-inflammatory, antioxidant and anticancer properties. The anticancer effects of honey are mediated via diverse mechanisms,including inhibition of proliferation, induction of apoptosis, suppression of free radicals and modulation of inflammatory signalling pathways. The present review assesses the chemopreventive effects of natural honey and its components in the modulation of gastrointestinal cancers and its modes of action in the prevention of the development of gastrointestinal tumors. Honey can be an approach as a cancer-preventive strategy which merits further experimental and clinical research in the near future.

关键词： Honey Gastrointestinal Cancer Chemoprevention Anticancer

Cranioplasty of Calvarial Skull Defects: A Comparative Study between Using Three Dimensional Custom-Made Cranioprostheses versus Hand-Made Bone Cement in Restoring Skull Configuration

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Open Journal of Modern Neurosurgery 2019年第3期9卷 314-326页

作者： mohamed Gaber abdel Tawab Mostafa A. latif, Ashraf abdel latif Osman Fayoum University Fayoum Egypt

Introduction: Cranioplasty is the surgical repair of a bony defect or deformity in the skull that is caused after cranial surgery or trauma. It carries cosmetic and protective benefits. Many types of materials are allowed. The subject of this study is to compare the outcome of two different manufacturing processes in reconstruction of calvarial skull defects by using 3D custom-made cranioprostheses versus hand-made bone cement implants. Patient and Methods: This is a prospective comparative study conducted on 20 patients of calvarial skull defects of different etiologies, sites and sizes, admitted in the neurosurgical departments of Cairo and Fayoum Universities in the period from August 2017 to February 2018. Patients are divided into two study groups: (group 1) 10 patients operated upon by 3D custom-made implant;(group 2) operated upon by hand-made bone cement implant. Statistical Analysis Used: Mann-Whitney test and Chi-square test. Results: Craniotomy using 3D custom-made implants gives better results than using bone cement in the functional restoration of skull shape and cranial protection with shorter operative time and less rate of postoperative complications. There is no statistically significant difference between the two study groups regarding cosmetic outcome. Conclusion: 3D custom-made implant is recommended for large and complex skull defects. Further and large studies might be needed.

关键词： Cranioplasty Custom-Made Implant Bone Cement

Intersection Curves of Implicit and Parametric Surfaces in R<sup>3</sup>

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Applied Mathematics 2011年第8期2卷 1019-1026页

作者： mohamed abdel-latif Soliman Nassar Hassan abdel-All Soad Ali Hassan Sayed abdel-Naeim Badr 不详

We present algorithms for computing the differential geometry properties of Frenet apparatus {t,n,b,κ,τ} and higher-order derivatives of intersection curves of implicit and parametric surfaces in R3 for transversal and tangential intersection. This work is considered as a continuation to Ye and Maekawa [1]. We obtain a classification of the singularities on the intersection curve. Some examples are given and plotted.

关键词： Geometric Properties Frenet Frame Frenet Apparatus Frenet-Serret Formulas Surface-Surface Intersection Transversal Intersection Tangential Intersection Dupin Indicatrices

Identity Verification of Individuals Based on Retinal Features Using Gabor Filters and SVM

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Journal of Signal and Information Processing 2016年第1期7卷 49-59页

作者： mohamed A. El-Sayed M. Hassaballah Mohammed A. abdel-latif Department of Mathematics Faculty of Science Fayoum University Fayoum Egypt CS Department College of Computers and Information Technology Taif University Taif KSA Department of Mathematics Faculty of Science South Valley University Qena Egypt

Authentication reliability of individuals is a demanding service and growing in many areas, not only in the military barracks or police services but also in applications of community and civilian, such as financial transactions. In this paper, we propose a human verification method depends on extraction a set of retinal features points. Each set of feature points is representing landmarks in the tree of retinal vessel. Extraction and matching of the pattern based on Gabor filters and SVM are described. The validity of the proposed method is verified with experimental results obtained on three different commonly available databases, namely STARE, DRIVE and VARIA. We note that the proposed retinal verification method gives 92.6%, 100% and 98.2% recognition rates for the previous databases, respectively. Furthermore, for the authentication task, the proposed method gives a moderate accuracy of retinal vessel images from these databases.

关键词： Image Preprocessing Gabor Filter SVM Authentication Identification Verification Retinal Features Feature Extraction Query Image

Different Analytical Methods of Para-Phenylenediamine Based Hair Dye

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Journal of Cosmetics, Dermatological Sciences and Applications 2013年第3期3卷 17-25页

作者： Hatem abdel Moniem Ahmed Ragaa mohamed abdel Maaboud Fathy Fahim Abdul latif Adel mohamed Kamal El-Dean Kamal mohamed El-Shaieb Eugenio Vilanova Carmen Estevan Chemistry De- partment Faculty of Science Minia University Minia Egypt Chemistry Department Faculty of Science Assiut University Assiut Egypt Department of Forensic Chemistry Faculty of Forensic Sciences Naif Arab University for Security Sciences Riyadh Saudi Arabia Department of Forensic Medicine & Clinical Toxicology Faculty of Medicine Assiut University Assiut Egypt Institute of Bioengineering Unit of Toxicology and Chemical Safety University Miguel Hernández of Elche Elche Spain Institute of Bioengineering Unit of Toxicology and Chemical Safety University Miguel Hernández of Elche Elche Spain.

Many cases of toxicity and mortality either due to accidental or deliberate ingestion of hair dyes were reported in Egypt, Sudan, Israel, Morocco, Saudi Arabia, India and Tunisia. In the field of forensic analytical toxicology, the identification and quantification of chemicals are essential in deaths related to intoxication. The aim of the present study is to conduct chemico-analytical characterization of para-phenylenediamine (PPD) based hair dye of (Black stone hair dye, SHD) currently used for dying hear in Egypt, to confirm the identification of its components, that may be potentially toxic on oral or dermal exposure, this study uses comparison between different analytical methods. The applied analytical methods were inductively coupled plasma/MS (ICP/MS), witch used to determine the metal components of the dye, high performance liquid chromatography/MS (HPLC/MS) and gas chromatography/mass spectroscopy (GC/MS) were used for qualitative and quantitative analysis of PPD in the dye. A derivatization method was applied by transforming PPD (aromatic amines) into corresponding imine derivatives. This compound was prepared by condensation of 4-methylbenzeneamine with benzaldehyed to give N-benzylidene-4-methylbenzene-amine, which is a very stable internal standard. ICP/MS analysis revealed that most metal components of hair dye are Be, Na, Al, K, Ca, Sc, Ti, V, Cr, Mn, Fe, Cu, and Zr, where HPLC/MS analysis revealed that PPD is the main ingredient of SHD. Derivatization is necessary for accurate determination of PPD in hair dye by GC/MS method and this results could not be obtained by direct injection of dye (without derivatization).

关键词： PPD PPD1 Stone Hair Dye ICP HPLC/MS and GC/MS

Utility of oral glucose tolerance test in predicting type 2 diabetes following gestational diabetes:Towards personalized care

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World Journal of Diabetes 2021年第10期12卷 1778-1788页

作者： Riad abdel latif Bayoumi Amar Hassan Khamis Muna A Tahlak Taghrid F Elgergawi Deemah K Harb Komal S Hazari Widad A abdelkareem Aya O Issa Rakeeb Choudhury mohamed Hassanein Jeyaseelan Lakshmanan Fatheya Alawadi Department of Basic Medical Sciences College of MedicineMohammed Bin Rashid University of Medicine and Health SciencesDubai 123United Arab Emirates Department of Biostatistics HBMDCMohammed Bin Rashid University of Medicine and Health SciencesDubai 123United Arab Emirates Department of Obstetrics and Gynecology Dubai Health AuthorityDubai 123United Arab Emirates Department of Endocrinology Dubai Health AuthorityDubai 123United Arab Emirates Department of Biostatistics Mohammed Bin Rashid University of Medicine and Health SciencesDubai 123United Arab Emirates

BACKGROUND Women with gestational diabetes mellitus(GDM)are at a seven-fold higher risk of developing type 2 diabetes(T2D)within 7-10 years after childbirth,compared with those with normoglycemic *** raised fasting blood glucose(FBG)levels has been said to be the main significant predictor of postpartum progression to T2D,it is difficult to predict who among the women with GDM would develop ***,we conducted a cross-sectional retrospective study to examine the glycemic indices that can predict postnatal T2D in Emirati Arab women with a history of *** To assess how oral glucose tolerance test(OGTT)can identify the distinct GDM pathophysiology and predict possible distinct postnatal T2D *** The glycemic status of a cohort of 4603 pregnant Emirati Arab women,who delivered in 2007 at both latifa Women and Children Hospital and at Dubai Hospital,United Arab Emirates,was assessed retrospectively,using the International Association of Diabetes and Pregnancy Study Groups(IADPSG)*** the total,1231 women were followed up and assessed in *** FBG and/or the 2-h blood glucose(2hrBG)levels after a 75-g glucose load were measured to assess the prevalence of GDM and T2D,according to the IADPSG and American Diabetes Association(ADA)criteria,*** receiver operating characteristic curve for the OGTT was plotted and sensitivity,specificity,and predictive values of FBG and 2hrBG for T2D were *** Considering both FBG and 2hrBG levels,according to the IADPSG criteria,the prevalence of GDM in pregnant Emirati women in 2007 was 1057/4603(23%),while the prevalence of pre-pregnancy T2D among them,based on ADA criteria,was 230/4603(5%).In the subset of women(n=1231)followed up in 2016,the prevalence of GDM in 2007 was 362/1231(29.6%),while the prevalence of prepregnancy T2D was 36/1231(2.9%).Of the 362 pregnant women with GDM in 2007,96/362(26.5%)developed T2D;142/362(39.2%)developed impaired fasting glucose;29/36

关键词： Type 2 diabetes Type 2 diabetes subtypes Oral glucose tolerance test Diabetes Gestational diabetes mellitus subtypes