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Formation and Characterization of Zinc Phosphate Coating on Reinforcing Steel Rebars

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材料科学与工程（中英文A版） 2013年第7期3卷 481-487页

作者： Mosaad Mohamad Sadawy mohamed taha Nooman Eltohamy Rabie Elsharkawy Mining and Petroleum Engineering Department Faculty of Engineering Al-Azhar University Nasr City 11884 Cairo Egypt Civil Engineering Department Faculty of Engineering Al-Azhar University Nasr City 11884 Cairo Egypt Nuclear & Radiological Regulatory Authority. Cairo Egypt

Zinc phosphate coating has been formed on reinforcing steel rebars by immersion in a zinc phosphate bath to enhance the corrosion resistance. The morphology and the coating composition on the electrode surface were analyzed by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDX) and X-ray diffraction. The phosphate films formed are mainly composed of hopeite (Zn3(PO4)2·4H2O) and phosphophyllite (Zn2Fe(PO4)2·4H2O). A mechanism is proposed to explain the formation of these phases. In addition the corrosion protection of the coating was studied by weight loss and electrochemical measurements. The results showed that, the coating layer on the rebar surface can effectively improve the corrosion resistance of steel in marine environment.

关键词：螺纹钢锌涂层钢筋磷酸 X-射线衍射分析扫描电子显微镜表征耐腐蚀性

Effect of Diabetes Self-Management Education on Glycaemic Control in Sudanese Adults with Type 2 Diabetes

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Journal of Biosciences and Medicines 2024年第3期12卷 316-327页

作者： Sahar Moawia Balla Elnour Tayseer Abdelmotalib Ahmed taha Haiam Abdalla Wadatalla Ziryab Zainelabdin mohamed Elmahdi Marwah Isam Abdulmajeed Mohammedahmed Rowa Abdelmonem Sidig Hamadto Nahla Yousif Osman Mohammed Saeed Omnia Mubarak Saad Abdallah Sulafa Abdelbagi Mustafa Ahmed Hanady Abdelhameed Ahmed mohamed Sarah Khalil Fathi Khalil Family Medicine Health Gates Primary Care Riyadh SAU Family Medicine Dhaman Health Assurance Hospitals Company Kuwait KWT Family Medicine First Health Cluster Riyadh SAU Emergency Department Sheikh Khalifa Medical City Abudahbi ARE Family Medicine University of Medical Sciences and Technology Khartoum SDN Family Medicine Sudan Medical Specialization Board-Sudan Khartoum SDN Family Medicine Ultra Care Home Care Company Riyadh SAU Medicine Department Health Gates Primary Care Riyadh SAU Family Medicine Mouwasat Hospital Madinah SAU

Research Background: The high prevalence of diabetes in Sudan, estimated at 16%, highlights the importance of effective health education in diabetes management. Diabetes self-management education has been identified as a crucial tool in enhancing the knowledge, attitudes, and abilities necessary for self-management among individuals with diabetes. Aim: To assess the impact of diabetes self-management education on medication adherence and glycemic control in Sudanese adults with type 2 diabetes before and 3 months after the DSME intervention. Method: The study was conducted in Sudan between September 2022 and March 2023, it was an interventional, one-group, pre- and post-test study that aimed to assess the impact of diabetes self-management education (DSME) on medication adherence and diabetes control in Sudanese adults with type 2 diabetes. The research was conducted in primary health care centers in six cities in Sudan and involved 244 participants. The data entry and statistical analysis were conducted using the Statistical Package for Social Sciences version 27.0. A paired t test was used for analysis. Results: The study included 244 participants, 67% of whom were males. The age mean ± SD was 48.6 ± 9.3 years, and 85.3% of participants were married. Age at onset of diabetes mean ± SD was 40.60 ± 7.81 years;44.6% had diabetes for less than 5 years;and 84.1% had a positive family history of diabetes mellitus. The levels of poor, low, and partial adherence to medication decreased by 8.2%, 4%, and 20.6%, respectively, after the intervention. The levels of good and high medication regime adherence increased by 13% and 19.8%, respectively;BMI decreased by 1.1 ± 0.73 kg/m2 (p = 0.005). The fasting blood sugar decreased by 69 ± 32.9 mg/dl (p = 0.049), and the glycated hemoglobin decreased by 1.21 ± 0.28% (p = 0.001). Conclusions: The findings of this study reinforce the importance of patient education in improving glycemic control and enhancing self-management

关键词： Sudan Adherence Intervention Education Self-Management Diabetes

Molecular docking of amphetamine,cathine and cathinone with dihydrofolate reductase:a computational analysis of inhibition of dihydrofolate reductase by khat alkaloids

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Toxicology Communications 2022年第2期4卷 23-28页

作者： Siddig Ibrahim Abdelwahab Abdullah Farasani Ahmed Jerah Manal mohamed Elhassan taha Anil Bidwai Medical Research Centre Jazan UniversityJazan 45142Saudi Arabia College of Applied Medical Sciences Jazan UniversityJazan 45142Kingdom of Saudi Arabia Substance Abuse Research Center Jazan UniversityJazan 45142Saudi Arabia

Interaction of amphetamine,cathine and cathinone with the enzyme dihydrofolate reductase was studied by molecular docking using AutoDock 4.2 as the docking software *** 4.2 software serves as a valid and acceptable docking application to study the interactions of small compounds with *** of amphetamine,cathine and cathinone with dihydrofolate reductase were compared to those of methotrexate,a known inhibitor of the *** calculated free energy of binding(ΔG binding)shows that the three ligands(ΔG=-6.87 to-7.21 kcal/mol;Ki=9.15 to 5.18μM)bind with affinity slightly lower than methotrexate(ΔG=-8.78 kcal/mol;Ki=363 nM).Binding interactions of the three ligands with active site residues of the enzyme are also *** the ligands appear to bind in a similar conformation making extensive VDW contacts in the active site of the *** bonding and pi-pi interaction with key active site residues is also ***,a probable inhibition of dihydrofolate reductase by khat alkaloids can be explained on the basis of this in silico binding and khat alkaloids can be considered as potential lead compounds in the development of new inhibitors of dihydrofolate reductase which is a potential target of anti-cancer *** results of these studies can serve as a starting point for further computational and experimental studies.

关键词： amphetamine cathine cathinone methotrexate docking AutoDock DHFR khat alkaloids

A Novel Analytical Technique of the Fractional Bagley-Torvik Equations for Motion of a Rigid Plate in Newtonian Fluids

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Computer Modeling in Engineering & Sciences 2020年第9期124卷 969-983页

作者： Mahmoud H.taha mohamed A.Ramadan Dumitru Baleanu Galal M.Moatimid Department of Mathematics Faculty of EducationAin Shams UniversityCairoEgypt Department of Mathematics&Computer Science Faculty of ScienceMenoufia UniversityShebin El-KomEgypt Department of Mathematics Cankaya UniversityAnkara06530Turkey Institute of Atomic Physics Magurele-Bucharest077125Romania Department of Medical Research China Medical University HospitalChina Medical UniversityTaichungTaiwan

The current paper is concerned with a modified Homotopy perturbation *** modification allows achieving an exact solution of an initial value problem of the fractional differential *** approach is powerful,effective,and promising in analyzing some classes of fractional differential equations for heat conduction problems and other dynamical *** crystallize the new approach,some illustrated examples are introduced.

关键词： Bagley-Torvik equation caputo sense Riemann-Liouville integral fractional differential equation

Evaluation of GALAD Score in Diagnosis and Follow-up of Hepatocellular Carcinoma after Local Ablative Therapy

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Journal of Clinical and Translational Hepatology 2023年第2期11卷 334-340页

作者： Rasha Eletreby Marwa Elsharkawy Alaa Awad taha mohamed Hassany Amr Abdelazeem mohamed El-Kassas Ahmed Soliman Endemic Medicine Department Faculty of MedicineCairo UniversityCairoEgypt Clinical and Chemical Pathology Department Faculty of MedicineCairo UniversityCairoEgypt Hepatogastroenterology Department Theodore Bilharz Research InstituteGizaEgypt Hepatogastroenterology Department National Hepatology and Tropical Medicine Research InstituteCairoEgypt Endemic Medicine Department Faculty of MedicineHelwan UniversityCairoEgypt

Background and Aims:Strategies for detection of early hepatocellular carcinoma(HCC)are still *** GALAD score is a serum biomarker-based model designed to predict the probability of having *** aimed to assess the ability of GALAD score to diagnose early HCC and its validity to follow patients after local ablation ***:This multicenter prospective study included 108 patients in two groups,58 HCC patients(67 focal lesions)with local ablative therapy(study group),and a control group of 50 patients with liver *** GALAD scores of the study and control groups,and of the HCC patients before and after ablative therapy were ***:Most patients were men(74.1%in study group and 76%in controls)with hepatitis C virus infection(98.30%in the study group,and 94%in controls).GALAD scores were significantly higher in HCC patients than in those with benign cirrhosis(2.65 vs.−0.37,p=0.001).Ablative therapy was successful in 94.4%of focal lesions<2 cm,and in 86.10%of 2–5 cm *** GALAD score was also significantly lower at 1 month after ablation in patients with well-ablated tumors(2.19 vs.0.98,p=0.001).The best cutoff values of GALAD score for diagnosis of early HCC,and for prediction of well ablation of HCC were 0.74 and≤3.31(areas under the curve of 0.92 and 0.75,sensitivities of 84.48%and 76.19%,specificities of 89.13%and 83.33%,positive predictive values of 90.74%and 94.1%,and negative predictive values of 82%and 35.7%respectively).Conclusion:The GALAD score was effective for the diagnosis of early HCC and for followup after ablative therapy.

关键词： GALAD score HCC Ablative therapy Liver cirrhosis Egypt

Cloning and characterization of 66 kDa streptavidin-binding peptides(SBP)of Pisum sativum *** specific to ***

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BIOCELL 2019年第3期43卷 155-166页

作者： MAHMOUD MOUSTAFA SAAD ALAMRI TAREK taha ALI SHATI SULAIMAN ALRUMMAN mohamed ALKAHTANI Department of Biology College of ScienceKing Khalid University9004AbhaKingdom of Saudi Arabia Department of Botany Faculty of ScienceSouth Valley UniversityQenaEgypt Environmental Biotechnology Department Genetic Engineering and Biotechnology Research Institute(GEBRI)City of Scientific Research and Technological Applications(SRTA-City)New Borg El-Arab City21934AlexandriaEgypt

The aim of the current research was to clone and to characterize the partial 66 kDa streptavidin-binding peptide(SBP)found in the germinated embryos of Pisum sativum *** pea(*** ***)embryos possess prominent 66 kDa SBPs that gradually disappeared after few hours of germination in germinated embryos,but not in the *** total RNA was isolated from embryos of *** but could not be isolated from the *** partial nucleotides sequences of 66 kDa SBPs of embryonic stalk(*** ***)were cloned and identified using pMOSBlue vector.66 kDa(SBP)gene from the embryos of *** *** possesses 327 bp having an open reading frame(ORF)region in a part of the gene that encoded for 108 amino *** showed similarity among 66 kDa SBPs *** ***,with *** seed biotinylated protein(SBP65)and *** sbp65a mRNA with DNA distance matrix between 0.0094 to ***-TOF mass spectrometry analysis of 66 kDa(SBP)proteins showed it had similar short peptides to 19 proteins found in different organisms,especially Convicilin precursor,and the seed biotinylated protein in *** alignment results of both nucleotide sequences and amino acid residues either from cloning or MALDI-TOF-MS showed differences with related species,especially *** mRNA was found in the cotyledons during seeds germination,which means no metabolic activities and this part may act only as food reservoirs for growing newly embryos.

关键词： Cloning Embryo 66 kDa Pisum sativum Streptavidin-binding peptides(SBP)

Feasible design for electricity generation from Chlorella vulgaris using convenient photosynthetic conditions

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BIOCELL 2018年第1期42卷 7-11页

作者： MAHMOUD MOUSTAFA TAREK taha mohamed ELNOUBY M.A.ABU-SAIED ALI SHATI mohamed AL-KAHTANI SULAIMAN ALRUMMAN Department of Biology College of ScienceKing Khalid University9004AbhaKingdom of Saudi Arabia(KSA) Department of Botany Faculty of ScienceSouth Valley UniversityQenaEgypt Environmental Biotechnology Department Genetic Engineering and Biotechnology Research Institute(GEBRI)City of Scientific Research and Technological Applications(SRTA-City)New Borg El-Arab City21934AlexandriaEgypt Composite and Nanostructured materials research department Advanced Technology and New Materials Research InstituteCity of Scientific Research and Technological Applications(SRTA-City)New Borg El-Arab City21934AlexandriaEgypt Polymer Materials Research Department Advanced Technology and New Materials Research InstituteCity of Scientific Research and Technological Applications(SRTA-City)New Borg El-Arab City21934AlexandriaEgypt

Many recent studies are concerned with low cost,easy to handle and alternative renewable energy as a feasible solution for the upcoming crisis of energy *** are unicellular entities the can only depend on CO_(2),water and solar power to cover their nutritional *** current study is concerned with using algal cells in a polymeric hydrogel,as a cheap source of energy for electricity *** vulgaris has been proved to be a promising algal species for electricity generation,as compared with Micractinium *** hydrogel has been used for the immobilization of both algal species in order to protect them from the adverse surrounding conditions in addition to its ability to slowly release the required water molecules according to *** these conditions,*** showed the ability to generate 60 mV compared with 15 mV generated by *** electron micrographs showed nano-threads that bind the *** cells to each other,indicating the ability of algae to create nanowires that facilitate the electron transfer among algal cells and from cells to the nearest ***,we would expect an increase in the produced potential with simultaneous amendment of environmentally polluted water,such as sewage or waste *** of FTIR and raman spectroscopy proved the presence of the characteristic groups of PVA hydrogel and proved the proper integration of the algal cells inside the hydrogel cavities.

关键词： Chlorella vulgaris immobilization PVA hydrogel Electricity generation Algae Microbial fuel cell(MFC)

Impact of referral pattern and timing of repair on surgical outcome after reconstruction of post-cholecystectomy bile duct injury:A multicenter study

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Hepatobiliary & Pancreatic Diseases International 2021年第1期20卷 53-60页

作者： Ayman El Nakeeb Ahmad Sultan Helmy Ezzat mohamed Attia mohamed Abd ElWahab taha Kayed Ayman Hassanen Ahmad AlMalki Ahmed Alqarni Mohammed M Mohammed Gastrointestinal Surgical Center Mansoura UniversityMansouraEgypt Minia University Hospital MiniaEgypt Aseer Central Hospital Aseer regionSaudi Arabia

Background:Bile duct injury(BDI)after cholecystectomy remains a significant surgical *** guideline exists to guide the timing of repair,while few studies compare early versus late repair *** study aimed to analyze the outcomes in patients undergoing immediate,intermediate,and delayed repair of ***:We retrospectively analyzed 412 patients with BDI from March 2015 to January *** patients were divided into three groups based on the time of BDI *** 1 underwent an immediate reconstruction(within the first 72 hours post-cholecystectomy,n=156);group 2 underwent an intermediate reconstruction(from 4 days to 6 weeks post-cholecystectomy,n=75),and group 3 underwent delayed reconstruction(after 6 weeks post-cholecystectomy,n=181).Results:Patients in group 2 had significantly more early complications including anastomotic leakage and intra-abdominal collection and late complications including anastomotic stricture and secondary liver cirrhosis compared with groups 1 and *** outcome was observed in 111(71.2%)patients in group 1,31(41.3%)patients in group 2,and 157(86.7%)patients in group 3(P=0.0001).Multivariate analysis identified that complete ligation of the bile duct,level E1 BDI and the use of external stent were independent factors of favorable outcome in group 1,the use of external stent was an independent factor of favorable outcome in group 2,and level E4 BDI was an independent factor of unfavorable outcome in group *** BDI and level E4 BDI were independent factors of unfavorable ***:Favorable outcomes were more frequently observed in the immediate and delayed reconstruction of post-cholecystectomy *** ligation of the bile duct,level E1 BDI and the use of external stent were independent factors of a favorable outcome.

关键词： Bile duct injury Hepaticojejunostomy Anastomotic stricture Biloma Biliary peritonitis

Phase-junction Ag/TiO_(2)nanocomposite as photocathode for H_(2)generation

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Journal of Materials Science & Technology 2021年第24期83卷 179-187页

作者： Hemdan S.H.mohamed mohamed Rabia Xian-Gang Zhou Xu-Sen Qin Gomaa Khabiri mohamed Shaban Hussein A.Younus S.taha Zhi-Yi Hu Jing Liu Yu Li Bao-Lian Su State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan430070China Physics Department Faculty of ScienceFayoum UniversityFayoum63514Egypt Nanophotonics and Applications Lab Physics DepartmentFaculty of ScienceBeni-Suef UniversityBeni-Suef62514Egypt Chemistry Department Faculty of ScienceFayoum UniversityFayoum63514Egypt Nanostructure Research Centre(NRC) Wuhan University of TechnologyWuhan430070China Laboratory of Inorganic Materials Chemistry(CMI) University of Namur61 rue de Bruxelles5000NamurBelgium

Developing anatase/rutile phase-junction in Ti O_(2)to construct Z-scheme system is quite effective to improve its photoelectrochemical *** this work,the anatase/rutile phase-junction Ag/Ti O_(2)nanocomposites are developed as photocathodes for hydrogen *** optimized Ag/Ti O_(2)nanocomposite achieves a high current density of 1.28 m A cm-2,an incident photon-to-current conversion efficiency(IPCE)of 10.8%,an applied bias photon-to-current efficiency(ABPE)of 0.32 at 390 nm and a charge carriers’lifetime up to 2000 *** enhancement on photoelectrochemical activity can be attributed to:(ⅰ)the generated Z-scheme system in the anatase/rutile phase-junction Ag/Ti O_(2)photocathode enhances the separation,diffusion and transformation of electron/hole pairs inside the structure,(ⅱ)Ag nanodots modification in the anatase/rutile phases leading to the tuned band gap with enhanced light absorption and(ⅲ)the formed Schottky barrier after Ag nanodots surface modification provides enough electron traps to avoid the recombination of photogenerated electrons and *** results here suggest that developing phase-junction nanocomposite as photocathode will provide a new vision for their enhanced photoelectrochemical generation of hydrogen.

关键词： Ag/TiO_(2)nanocomposites Anatase/rutile phase-junction Z-scheme Photocathode H2 generation