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流态粒子炉用于粉末烧结的可能性(英)

工业加热 1986年第2期18卷 60-22页

作者： Mohamad Emad kassem 汤超刘灿英

流态粒子炉由于具有很强的传热能力,要比普通强制对流辐射的炉子大5～10倍,加热和冷却时间可节省80％以上,其热效率达40％以上;炉温可以达到1500℃。

关键词：粉末烧结流态烧结炉粉末冶金工业

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Tribo-Mechanical and Electrochemical Properties of Carbonitrided 316 Austenitic Stainless Steel by rf Plasma for Biomedical Applications

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Advances in Materials Physics and Chemistry 2018年第9期8卷 358-377页

作者： F. M. El-Hossary M. Raaif A. M. Abd El-Rahman M. Abo EL-kassem Physics Department Faculty of Science Sohag University Sohag Egypt

AISI 316 austenitic stainless steel was carbonitrided using rf plasma with purpose of using low-cost orthopedic implant materials in biomedical applications besides the manufacturing requests. The plasma treatment process was accomplished at low working gas pressure of 0.075 mbar in nitrogen-acetylene gaseous mixture. The plasma-processing time was fixed at 10 min while the plasma-processing power was varied from 450 to 650 watt. The effect of plasma treatment power on the structure, tribological, mechanical, electrochemical and biocompatibility of AISI 316 has been investigated. The structural results demonstrated the formation of nitrogen and carbon solid solutions, chromium nitride, iron carbide and iron nitride phases in the treated samples. The microhardness of the treated layer increases with increasing the processing power to reach a maximum value of approximately 1300 HV0.1 at 600 W which represents more than 6-folds increase in microhardness in comparison with the untreated matrix. The wear and corrosion resistance of the treated AISI 316 were enhanced compared to the untreated one. The friction coefficient was reduced from nearly 0.5 for the untreated substrate to nearly 0.3 for the carbonitrided sample. The surface energy and wettability of the carbonitrided samples were augmented as the plasma-processing power increased. Furthermore, the numbers of grown mesenchymal stem cells are higher for carbonitrided samples compared to the untreated one. The formation of nitrogen and carbon solid solution, chromium nitride, iron nitride and iron carbide hard phases after carbonitriding process is responsible for achieving good mechanical, tribological, biocompatibility and electrochemical properties for AISI 316 alloys.

关键词： Plasma-Material Interactions 52.40.Hf Surface Hardening 81.65.Lp Mechanical Properties 62.20.Qp Surface Energy 68.35.Md Biocompatibility 87.85.Jj

Identification of Quantitative Trait Loci (QTL) Underlying Protein, Oil, and Five Major Fatty Acids’ Contents in Soybean

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American Journal of Plant Sciences 2014年第1期5卷 158-167页

作者： Masum Akond Shiming Liu Melanie Boney Stella K. Kantartzi Khalid Meksem Nacer Bellaloui David A. Lightfoot My Abdelmajid kassem Department of Plant Soil and Agricultural Systems Southern Il-linois University Carbondale USA Plant Genomics and Biotechnology Lab Department of Biologi-cal Sciences Fayetteville State University Fayetteville USA United States Department of Agriculture-Agricultural Research Service Crop Genetics Research Unit Stoneville USA

Improved seed composition in soybean [Glycine max (L.) Merr.] for protein and oil quality is one of the major goals of soybean breeders. A group of genes that act as quantitative traits with their effects can alter protein, oil, palmitic, stearic, oleic, linoleic, and linolenic acids percentage in soybean seeds. The objective of this study was to identify Quantitative Trait Loci (QTL) controlling protein, oil, and fatty acids content in a set of F5:8 RILs derived from a cross between lines, ‘MD 96-5722’ and ‘Spencer’ using 5376 Single Nucleotide Polymorphism (SNP) markers from the Illumina Infinium SoySNP6K BeadChip array. QTL analysis used WinQTL Cart 2.5 software for composite interval mapping (CIM). Identified, were;one protein content QTL on linkage group (LG-) B2 or chromosome (Chr_) 14;11 QTL associated with oil content on six linkage groups LG-N (Chr_3), LG-A1 (Chr_5), LG-K (Chr_9), LG-F (Chr_13), LG-B2 (Chr_14), and LG-J (Chr_16);and sixteen QTL for five major fatty acids (palmitic, stearic, oleic, linoleic, and linolenic acids) on LG-N (Chr_3), LG-F (Chr_13), LG-B2 (Chr_14), LG-E (Chr_15), LG-J (Chr_16), and LG-G (Chr_18). The SNP markers closely linked to the QTL reported here will be useful for development of cultivars with altered oil and fatty acid compositions in soybean breeding programs.

关键词： Soybean SNP Linkage Map QTL RIL Oil Major Fatty Acids MD96-5722 Spencer

Mapping of QTL Associated with Seed Amino Acids Content in “MD96-5722” by “Spencer” RIL Population of Soybean Using SNP Markers

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Food and Nutrition Sciences 2015年第11期6卷 974-984页

作者： Laila Khandaker Masum Akond Shiming Liu Stella K. Kantartzi Khalid Meksem Nacer Bellaloui David A. Lightfoot My Abdelmajid kassem Plant Genomics and Biotechnology Laboratory Department of Biological Sciences Fayetteville State University Fayetteville NC USA Department of Plant Soil and Agricultural Systems Southern Illinois University Carbondale IL USA Crop Genetics Research Unit Agricultural Research Service USDA Stoneville MS USA The School of Arts and Sciences American University of Ras Al Khaimah Ras Al Khiamah United Arab Emirates

Limited information is available on the genetic analysis of amino acid composition in soybean seeds. Previously, quantitative trait loci (QTLs) for seed isoflavones, protein, oil, and fatty acids were identified in the “MD96-5722” by “Spencer” and other RIL populations. There were wide variations for these seed constituents among the RIL populations. Therefore, the objective of this study was to identify QTLs controlling different amino acids content in soybean seeds. To achieve this objective, ninety-two F5:7 recombinant inbred lines (RIL), developed from a cross of MD96-5722 and Spencer, using a total 5376 Single Nucleotide Polymorphism (SNPs) markers, were used. The RILs were genotyped by using 537 polymorphic, reliably segregating SNP markers, developed from the Illumina Infinium SoySNP6K BeadChip array. A total of 13 QTLs were identified with three QTLs for threonine on the linkage group (LG) A1, C2, and B2. Two QTLs were identified for each of the amino acids proline on LG D1a and B2, serine on LG A1 and C2, tryptophan on LG K and G, and cysteine on LG A1 and K. One QTL was identified for arginine on LG N and histidine on LG J. The new QTLs findings for seed amino acid will facilitate the development of soybean cultivars with higher protein and amino acid quality to help meet the industry and consumer needs.

关键词： Soybean Amino Acids SNP QTLs Seed Composition Constituents

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由烷基萘制的表面活性剂(上)

日用化学品科学 1986年第1期 12-15页

作者： T.M.kassem 赵陈超

第一部分由2-烷基萘制的新型表面活性剂实验 2-烷基萘的制备(烷基:n-C9,n-C10,n-C16,n-C1 8) 在无水三氯化铝、硝基苯存在下将已酰氯、癸酰氯、十六酰氯、十八酰氯与萘反应,产生相应酮（Ⅰ～Ⅳ）。在二甘醇中,用90%水合肼将这些酮还原... 详细信息

第一部分由2-烷基萘制的新型表面活性剂实验 2-烷基萘的制备(烷基:n-C9,n-C10,n-C16,n-C1 8) 在无水三氯化铝、硝基苯存在下将已酰氯、癸酰氯、十六酰氯、十八酰氯与萘反应,产生相应酮（Ⅰ～Ⅳ）。在二甘醇中,用90%水合肼将这些酮还原为相应烷基萘（Ⅴ～Ⅷ）。

关键词：表面活性剂环氧乙烷界面张力表面张力磺酞乳化能力水泥外加剂氧化乙烯环氧化物表面性质有机硫化合物乙氧基化物润湿能力乙氧化物

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从石油石蜡制造的表面活性剂

日用化学品科学 1984年第2期 4-8页

作者： T.M.kassem 邓瑞焯

一、引言一些国家广泛使用石蜡作为氧化法生产脂肪酸的重要原料。本文是已发表的关于石蜡氧化生产合成脂肪酸在表面活性剂领域利用的研究之延伸。本研究之目的在于将制得的脂肪酸转化成与其相应的脂肪族伯胺,然后把这胺类加工成非离子... 详细信息

一、引言一些国家广泛使用石蜡作为氧化法生产脂肪酸的重要原料。本文是已发表的关于石蜡氧化生产合成脂肪酸在表面活性剂领域利用的研究之延伸。本研究之目的在于将制得的脂肪酸转化成与其相应的脂肪族伯胺,然后把这胺类加工成非离子、阳离子及氧化胺表面活性剂。对于这些表面活性剂的化学结构及其表面活性的某些关系进行了讨论。

关键词：表面活性剂阳离子脂肪酸一氯甲基界面张力表面张力水泥外加剂正离子表面性质发泡力乙氧基化

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对非离子洗涤剂的某些研究

日用化学品科学 1985年第3期 9-13页

作者： T.M.kassem 赵陈超

引言在合成洗涤剂制备中,环氧乙烷缩合是主要步骤之一,它是把亲本官能团引入一有机分子中,目的是产生具有所需亲水-亲油平衡值(HLB)的表面活性剂。非离子表面活性剂的某些研究工作现已着手进行,到目前为止,对长直链脂肪酸、酰胺、醇、... 详细信息

引言在合成洗涤剂制备中,环氧乙烷缩合是主要步骤之一,它是把亲本官能团引入一有机分子中,目的是产生具有所需亲水-亲油平衡值(HLB)的表面活性剂。非离子表面活性剂的某些研究工作现已着手进行,到目前为止,对长直链脂肪酸、酰胺、醇、硫醇等环氧乙烷加合物的表面活性没有进行比较研究,为此,本文在这方面作些探讨。实验原料 1.长直链脂肪酸:辛酸,癸酸,十二酸,十六酸,十八酸。

关键词：乙氧化物醋化界面张力表面张力脂肪酸表面性质非离子表面活性剂润湿能力疏水物碳链长度乳化能力氧化乙烯环氧化物环氧乙烷

The Screening of Diabetes, Obesity and Hypertension Risks Associated with Hepatitis C Within the Egyptian Population in a Community Pharmacy Setting

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Journal of Clinical and Nursing Research 2022年第3期6卷 31-42页

作者： Amira B kassem Mohamed EA Abdelrahim Alaa Mousa Amira Harun Heba Al-husseini Salma Khaled Mahmoud Elhadidy Osama Mohamed Ibrahim Department of Clinical Pharmacy and Pharmacy Practice Faculty of PharmacyDamanhour University Egypt Department of Clinical Pharmacy and Pharmacy Practice Beni-Suef University Faculty of PharmacyBeni-SuefEgypt Hepatology Department Ministry of HealthEgypt Department of Pharmacy Practice and Pharmacotherapeutics College of PharmacyUniversity of SharjahUAE Department of Clinical Pharmacy Faculty of PharmacyCairo University CairoEgypt

Background:Diabetes and hypertension have been identified as risk factors for HCV complications in previous *** has sparked the interest in the field of prevention by identifying at-risk individuals and increasing investments for screening among *** aim of this study was to screen for risk factors,including age,gender,BMI,hypertension,diabetes,and obesity,in Egyptian patients with HCV Methods:A prospective cross-sectional study was carried out from September 2018 to February 2019,with a total of 1,959 medical records *** comparing the patients'characteristics,variables related to metabolic risk,and body composition measurements,regression models have been established to determine any confounding ***:The prevalence of HCV antibody was 41.0%in men and 59.0%in *** the variables included in the regression analysis,age,BMI,and uncontrolled hypertension were found to have statistically significant associations with diabetes in HCV positive cases(p40 years old with high BMI were found to have significant associations with both,diabetes and hypertension(p40,and DM(p<0.001).Conclusion:HCV infection and metabolic disorders have a closed cycle *** the complications of DM has a promising prospective of limiting the complications of HCV .

关键词： Hepatitis C virus Diabetes Obesity Hypertension

Retrograde-viewing device improves adenoma detection rate in colonoscopies for surveillance and diagnostic workup

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World Journal of Gastroenterology 2012年第26期18卷 3400-3408页

作者： Peter D Siersema Amit Rastogi Anke M Leufkens Paul A Akerman kassem Azzouzi Richard I Rothstein Frank P Vleggaar Alessandro Repici Giacomo Rando Patrick I Okolo Olivier Dewit Ana Ignjatovic Elizabeth Odstrcil James East Pierre H Deprez Brian P Saunders Anthony N Kalloo Bradley Creel Vikas Singh Anne Marie Lennon Daniel C DeMarco Department of Gastroenterology and Hepatology University Medical Center Utrecht3508 GA UtrechtThe Netherlands Division of Gastroenterology and Hepatology Kansas City Veterans Administration Medical CenterKansas CityMO 64128United States Department of Gastroenterology Bayside Endoscopy Center33 Staniford StreetProvidenceRI 02905United States Department of Gastroenterology Cliniques Universitaires Saint-LucUniversité Catholique de LouvainB-1200 BrusselsBelgium Department of Gastroenterology and Hepatology Dartmouth-Hitchcock Medical CenterOne Medical Center DriveLebanonNH 03756United States Department of Gastroenterology Istituto Clinico Humanitas20089 RozzanoItaly Department of Internal Medicine Division of Gastroenterology and HepatologyJohns Hopkins HospitalBaltimoreMD 21205United States Wolfson Unit for Endoscopy St.Mark's HospitalHarrow HA1 3UJUnited Kingdom Department of Internal Medicine Division of GastroenterologyBaylor University Medical CenterDallasTX 75246United States

AIM:To determine which patients might benefit most from retrograde viewing during colonoscopy through subset analysis of randomized,controlled trial ***:The Third Eye Retroscope Randomized Clinical Evaluation(TERRACE) was a randomized,controlled,multicenter trial designed to evaluate the efficacy of a retrograde-viewing auxiliary imaging device that is used during colonoscopy to provide a second video image which allows viewing of areas on the proximal aspect of haustral folds and flexures that are difficult to see with the colonoscope's forward *** performed a post-hoc analysis of the TERRACE data to determine whether certain subsets of the patient population would gain more benefit than others from use of the *** were patients scheduled for colonoscopy for screening,surveillance or diagnostic workup,and each underwent same-day tandem examinations with standard colonoscopy(SC) and Third Eye colonoscopy(TEC),randomized to SC followed by TEC or vice ***:Indication for colonoscopy was screening in 176/345 subjects(51.0%),surveillance after previous polypectomy in 87(25.2%) and diagnostic workup in 82(23.8%).In 4 subjects no indication was *** reported overall results had shown a net additional adenoma detection rate(ADR) with TEC of 23.2% compared to *** risk(RR) of missing adenomas with SC vs TEC as the initial procedure was 1.92(P = 0.029).Post-hoc subset analysis shows additional ADRs for TEC compared to SC were 4.4% for screening,35.7% for surveillance,55.4% for diagnostic and 40.7% for surveillance and diagnostic *** RR of missing adenomas with SC vs TEC was 1.11(P = 0.815) for screening,3.15(P = 0.014) for surveillance,8.64(P = 0.039) for diagnostic and 3.34(P = 0.003) for surveillance and diagnostic *** a multivariate Poisson regression suggested gender as a possibly significant factor,subset analysis showed that the difference between genders was not statistically ***

关键词： Colonoscopy Colorectal cancer Adenomas Miss rates Retrograde-viewing