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Radiation Shielding Analysis for Pressurized Heavy Water Reactors (CANDU) Using MCNPX Code

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材料科学与工程（中英文B版） 2022年第2期12卷 50-57页

作者： Afrah el-Khawlani moustafa Aziz Ali ellithi Faculty of Science Sana’a UniversitySana’a 72738Yemen Nuclear and Radiological Regulatory Authority Nasr City 11762Cairo College of Science Cairo UniversityCairo 12613Egypt

MCNPX(Monte Carlo N-Particle Transport Code)computer code is used to design a model to CANDU(Canada Deuterium Uranium)reactor core and its shielding *** is assumed that reactor core is fueled with natural *** core radiation sources are calculated which consider prompt neutrons,neutron induced gamma and prompt gamma *** total neutron flux and dose rate are calculated along the shield and at outer shield *** results indicated that the major dose rate component at outer shield points is due to neutron induced gamma dose rate(μSv/h).

关键词： CANDU reactor MCNPX code reactor shielding natural uranium radiation source

Vascularization is the next challenge for skin tissue engineering as a solution for burn management

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Burns & Trauma 2020年第1期8卷 174-185页

作者： Hady Shahin moustafa elmasry Ingrid Steinvall Folke Soerg Ahmed el-Serafi Department of Hand Surgery and Plastic Surgery and Burns Linkoing University Hospital58185LinkoingOtergolandSweden The Department of Biomedical and Clinical Sciences Linkoing UniversityLinkoing University Hospital58183LinkoingOtergolandSweden Faculty of Biotechnology MSA University26 July Mehwar Road125856th October City.Egypt

Skin regeneration represents a promising line of management for patients with skin loss,including burn *** current approach of spraying single cells over the defective areas results in variable success rates in different *** modern approach is to synthesize a multilayer skin construct that is based on autologous stem *** of the main complications with different types of transplants is sloughing due to the absence of proper *** proper vascularization will be crucial for the integration of skin constructs with the surrounding *** of the right cells with scaffolds of proper physico-chemical properties,vascularization can be markedly *** material effect,pore size and adsorption of certain proteins,as well as the application of appropriate growth factors,such as vascular endothelial growth factors,can have an additive effect.A selection of the most effective protocols is discussed in this review.

关键词： Burn Skin Regeneration Tissue engineering Vascularization

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)

用磷酸三丁酯浸渍树脂从硝酸介质中提取铈(Ⅳ)(英文)

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Transactions of Nonferrous Metals Society of China 2012年第1期22卷 206-214页

作者： O.S.HelALY M.S.ABD el-GHANY M.I.moustafa A.H.ABUZAID N.M.ABD el-MONEM I.M.ISMAIL Nuclear Materials Authority P.O.Box 530 El-MaadiCairoEgypt Faculty of Engineering Chem.Eng.Dept.Cairo UniversityGizaEgypt

用磷酸三丁酯(TBP)溶剂浸渍高分子交换树脂XAD-16来制备浸渍树脂。在室温下,将未稀释的磷酸三丁酯与树脂按液固比6(磷酸三丁酯体积与树脂质量比)浸渍24h得到的浸渍树脂的质量比为1.944;按液固比3.0浸渍24h,得到的浸渍树脂的质量比为1.8... 详细信息

用磷酸三丁酯(TBP)溶剂浸渍高分子交换树脂XAD-16来制备浸渍树脂。在室温下,将未稀释的磷酸三丁酯与树脂按液固比6(磷酸三丁酯体积与树脂质量比)浸渍24h得到的浸渍树脂的质量比为1.944;按液固比3.0浸渍24h,得到的浸渍树脂的质量比为1.88。将从埃及独居石矿砂得到的含37%铈、1.6%钍和40%三价稀土氧化物的氧化铈(IV)精矿浸出得到的硝酸铈溶液,用所制备的浸渍树脂从该铈溶液提取铈。在室温下,用该浸渍树脂从硝酸介质中提取Ce(IV)的效果是令人满意的。在溶液中含51.57g/L铈、2.48g/L钍、5.0mol/L游离硝酸,溶液与树脂比为10.0,浸渍时间为5.0min的条件下,该浸渍树脂对Ce(IV)的负载容量达到理论值(173g/kg(Ce/SIR))的95.6%。在其他条件不变的情况下,将铈的浓度提高到91.43g/L,浸渍树脂对Ce(Ⅳ)的负载容量达到理论值的98.75%。

关键词：铈(Ⅳ) 独居石砂磷酸三丁酯浸渍树脂提取硝酸介质

Investigating the Effect of Various Nanomaterials on the Wettability of Sandstone Reservoir

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World Journal of Engineering and Technology 2015年第3期3卷 116-126页

作者： el-Abbas moustafa Ahmed Noah Karam Beshay Lamees Sultan Mina Essam Omar Nouh Egyptian Petroleum Research Institute (EPRI) Cairo Egypt Petroleum and Energy Engineering Department Faculty of Science and Engineering The American University Cairo Egypt

Wettability is the ability of a fluid to stick to a solid surface in the presence of other immiscible fluids. Wettability alteration is crucial as it affects the amount of oil recovered from a given reservoir. The majority of enhanced oil recovery mechanisms purposefully alter the wettability of the reservoir rock from oil-wet to water-wet;to increase the amount of oil recovered from it. This study investigates the effect of various nanomaterials on the wettability, and particularly the brine phase contact angle, of a sand stone reservoir. The nanomaterials used are Magnesium/Aluminum Layered Double Hydroxide, Silica/Zirconia, and a combination of 80.0% Magnesium/Aluminum Layered Double Hydroxide (Mg/Al-LDH) and 20.0% Silica/Zirconia (Zi/Zr). The results suggest that a concentration of 4.0 g/L of Magnesium/Aluminum Layered Double Hydroxide (Mg/Al-LDH) decreases the brine phase contact angle, in the presence of oil, from 66° to 60° in 0.033 minute as opposed to Silica/Zirconia which increases the brine phase contact angle to 68° in the same time interval. The combination of both nanoparticles results in a decrease of 1.0° in the brine phase contact angle indicating that Silica/Zirconia (Zi/Zr) lowers the efficiency of Magnesium/Aluminum Layered Double Hydroxide’s adsorption to the sandstone surface.

关键词： Nanomaterials Wettability Alteration Oil Recovery Mechanism

Potent Anticonvulsant 1H-Imidazol-5(4H)-One Derivatives with Low Neurotoxicity

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Open Journal of Medicinal Chemistry 2012年第2期2卷 24-29页

作者： Mosaad Sayed Mohamed Rehab Kamel Mahmoud Amira Ibrahim Sayed moustafa E. el-Araby Pharmaceutical Organic Chemistry Department Faculty of Pharmacy Helwan University Cairo Egypt Pharmacology and Toxicology Department Faculty of Pharmacy Helwan University Cairo Egypt

We report here the synthesis and in vivo anticonvulsant/neurotoxicity activities of a series of compounds belonging to 2-aryl-4-arylidene-1-phenyl-1H-imidazol-5(4H)-one. The scaffold is based on the commonality of 5-membered lactam ring structures as successful anticonvulsant agents. The present compounds exhibited a range of anticonvulsant activity in pentylenetetrazole (PTZ)-induced seizure test. In particular, the protection was excellent by compounds bearing furylmethylidene on C4, possibly due to good pharmacokinetic properties. It was found that high lipophilicity and/or electron deficient aryl ring substitution at C4 compromised the anticonvulsant activities. For example, chloro analogues were found much less active than unsubstituted phenyl or furyl derivatives. Regarding side effects, active compounds exerted no observable neurotoxic effect at their therapeutic doses in Chimney test.

关键词： Imidazole Imidazolone Anticonvulsant Antiepileptic Valproic Acid Neurotoxicity

Cross Sectional Study of Skin Carriage and Enterotoxigenicity of Staphylococcus aureus among Food Handlers

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Open Journal of Medical Microbiology 2014年第1期4卷 16-22页

作者： moustafa el-Shenawy Mohamed Tawfeek Lobna el-Hosseiny Mohamed el-Shenawy Aida Farag Hoda Baghdadi Ola Saleh Jordi Manes Jose Miguel Soriano Department of Food Microbiology National Research CenterCairoEgypt Department of Environmental Studies Institute of Graduate Studies and ResearchAlexandria UniversityAlexandriaEgypt Department of Microbiology National Institute of Oceanography and FisheriesAlexandriaEgypt Observatory of Nutrition and Food Safety in Developing Countries Department of Preventive Medicine and Public HealthFaculty of PharmacyUniversity of ValenciaBurjassotSpain

The prevalence of enterotoxigenic Staphylococcus aureus was investigated among 200 participants working in three different food processing plants in Egypt. Using skin swabs, 75 (38%) of the 200 tested persons were positive for the presence of S. aureus. Of the S. aureus positive persons, 28 (14%) harboured S. aureus produced staphylococcal enterotoxins. The serotypes of these enterotoxins were enterotoxin A (68%), enterotoxin B (36%), enterotoxin C (46%) and enterotoxin D (18%). Some of these isolates produced more than one type of enterotoxins namely AB, AC, BC, BD, ABC and ACD. Analysis of risk factors implicated in skin carriage of S. aureus as age, gender, marital status, education, duration in employment, frequency and method of hand wash and incidence of chronic skin infection revealed insignificant association with staphylococcal skin carriage. The obtained results put forth the risk of food contracting contamination with enterotoxigenic strains of S. aureus owing to skin colonization of S. aureus among food handlers.

关键词： Enterotoxigenic S.aureus Skin Carriage Risk Factors Food Handlers

Pull Breech out versus Push Impacted Head up in Emergency Cesarean Section: A Comparative Study

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Open Journal of Obstetrics and Gynecology 2014年第6期4卷 260-265页

作者： Hend S. Saleh Gamal A. Kassem Mohamed el Said Mohamed moustafa A. Ibrahiem Manal M. el Behery Faculty of Medicine Zagazig University Zagazig Egypt

Objective: To compare maternal and fetal outcome associated with two methods Reverse breech extraction versus Head pushing to deliver the impacted fetal head in advanced labor requiring emergency Cesarean section. Method: A prospective comparative study was conducted on 80 pregnant women at term with cephalic presentation in advanced labour, requiring emergency Cesarean Section. Reverse breech extraction technique (pull method) was used in 40 cases (group I) and pushing the head up through the vagina (“push” method) was tried in (group II) 40 cases. The maternal outcome was assessed by extension of the uterine Incision, bladder injury, intra and postoperative blood transfusion, Postpartum hemorrhage, wound infection and duration of hospital stay. Fetal outcome was Apgar score and admission to neonatal intensive care unit. Results: Extension of the uterine incision was significantly lower in women undergoing reverse breech extraction compared to cephalic delivery (20% versus 50%;p = 0.001). The mean operative time (pull group) was lower than that in the (push group) 59.7 ± 4.2, versus 75.2 ± 6.1 p = 0.001 and blood loss was significantly lower in the (pull group) than that in the (push group) 878 ± 67 ml, versus 1321 ± 57 ml, p = 0.001. No significant difference between groups regarding maternal and neonatal outcome. Conclusion: Reverse breech extraction (pull) is safer than pushing head up through vagina (push) for delivery of a deeply impacted fetal head in advanced labour sensitizing emergency Cesarean Section and is associated with the least maternal complications.

关键词： Deeply Engaged Head Obstructed Labor Cesarean Section Reverse Breech Extraction Head Push Method

Effect of Atrial Fibrillation on Acute Ischemic Stroke Severity

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Open Journal of Medical Imaging 2014年第2期4卷 95-101页

作者： Taha Kamel Alloush Mahmoud Haroun Ibrahim Nahed Salah el Dein Ahmed Ibrahim Ghada Samir el-shahed Lobna Mohamed Nabil el-Sayed Mohamed Hamdy Ibrahim Hosam Ahmed Azmy Faculty of Medicine Ain Shams University Cairo Egypt Ministry of Health Cairo Egypt

Objectives: To assess the impact of atrial fibrillation on stroke severity and short-term (1 month) mortality. Materials and Methods: Totally 200 patients admitted to Ain Shams University Specialized Hospital were recruited and diagnosed clinically to have acute ischemic stroke within 3 days. Patients with hemorrhagic infarctions were excluded. History taking about previous heart disease was taken, full general and neurological examinations were done. Full metabolic profile, full cardiac investigations, carotid duplex, MRI brain stroke protocol with initial clinical evaluation and after 1 month re-evaluation using (NIHSS ) scale. Results: All patients underwent transthoracic echocardiography which revealed absence of “A” wave corresponding to atrial fibrillation in 33 patients (16.5%). Those Patients with atrial fibrillation had a median NIHSS score of 11.00 with IQR of 6.00 - 18.50 at admission and 6.00 with IQR of 2.00 - 14.50 after one month. Patients with atrial fibrillation showed significantly higher NIHSS at admission than patients in sinus rhythm, P el stenosis in 117 (79.1%) patients. 51 (34.4%) patients had lacunar infarction, 65 (43.9%) patients had partial anterior circulation infarction, 25 (16.2%) patients had posterior circulation infarction and 7 (4.7%) patients had total anterior circulation infarction. 111 (75%) patients showed leucoaraiosis. Conclusion: Atrial fibrillation was found not to have significantly statistical effect on stroke severity and short term mortality.

关键词： Atrial Fibrillation (AF)