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Effect of Adding Sb on Microstructure, Mechanical Properties and in <i>Vitro</i>Degradation Behavior of as Cast Mg-4wt% Zn Alloy for Medical Application

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Journal of Surface Engineered Materials and Advanced Technology 2017年第4期7卷 69-85页

作者： Hadeer I. Mohamed Mohamed E. Moussa Mohamed A. Waly Gamilla S. Al-Ganainy Aya B. Ahmed Mona S. talaat Biophysics Group Physics Department Faculty of Science Ain Shams University Cairo Egypt Department of Neuroscience Technology College of Applied Medical Sciences in Jubail Imam Abdulrahman Bin Faisal University Jubail Kingdom of Saudi Arabia Department of Manufacturing Technology Laboratory of Foundry Central Metallurgical Research and Development Institute (CMRDI) Helwan Egypt Physics Department Faculty of Science Ain Shams University Cairo Egypt

Magnesium (Mg) and its alloys are one of a novel kind of biodegradable metallic implants which attracted much fundamental research to develop its clinical application. Nevertheless, it has more restrictions in biomedical applications because it degrades too fast at the early stage after implantation, thus commonly leading to some problems such as early fast mechanical loss, hydric bubble aggregation, gap formation between the implants and the tissue. This work aims to study the effect of 0.5 wt% Sb addition on the microstructure, mechanical properties and degradation behavior of as cast Mg-4wt% Zn alloy. The evaluation process was conducted using optical and scanning electron microscopy, X-ray diffraction, tensile and compression tests, in addition to a corrosion study by immersing in simulated body fluid (SBF). Results showed that Sb refines the grain size of the base alloy and also enhances its mechanical properties and degradation rate as well. These were due to the formation of the secondary phase of Mg3Sb2. To get better degradation rate, the Mg-4wt% Zn and Mg-4wt% Zn-0.5wt% Sb alloys are coated with Ca-P using autocatalytic technique. The results demonstrated that the formed coat layer improves the degradation rate of samples under the condition of this study. The current study shows that Mg-4wt% Zn-0.5wt% Sb alloy has good mechanical properties and when it coated by Ca-P, it gave a better corrosion resistance that makes it ideal for biodegradable medical application.

关键词： Mg Alloy Mechanical Properties Autocatalytic Route Degradation Rate Calcium Phosphate Coating

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埃及学生汉语趋向补语偏误分析

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汉语国际传播研究 2019年第1期 166-173页

作者：穆爱娅贝尼苏非大学语言学院中文系开罗大学文学院中文系

阿拉伯语和汉语是两种语法系统完全不同的语言,这使埃及学生在学习汉语过程中出现很多语法偏误,趋向补语的使用偏误就是其中之一.本文通过调查总结出埃及学生学习趋向补语时出现的结构偏误和语义偏误,分析了偏误产生的原因,并提出了针... 详细信息

阿拉伯语和汉语是两种语法系统完全不同的语言,这使埃及学生在学习汉语过程中出现很多语法偏误,趋向补语的使用偏误就是其中之一.本文通过调查总结出埃及学生学习趋向补语时出现的结构偏误和语义偏误,分析了偏误产生的原因,并提出了针对埃及学生的趋向补语教学策略.

关键词：埃及学生趋向补语偏误分析教学策略

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免疫介导的肝损伤:肝外胆管闭锁婴儿CD4^+、CD8^+和CD68^+的预后价值

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世界核心医学期刊文摘（儿科学分册） 2006年第1期2卷 38-38页

作者： Kotb M.A. El Henawy A. talaat S. 郭战宏 Department of Paediatrics Cairo University Cairo Egypt

Background: Hepatic fibrosis and cirrhosis develop progressively in extrahepat ic biliary atresia (EHBA) despite timely surgical intervention. Purpose: The aim of the study was to define CD4+helper T lymphocytes, cytotoxic CD8+T lymphocy tes, and CD68+(macrophages) infiltration of portal tracts and lobules and hepat ic fibrosis as possible predictive measures of outcome of infants having EHBA. M ethods: The outcome of 32 infants with EHBA was correlated to their percutaneous biopsy and postportoenterostomy core liver tissue infiltration by CD4+, CD68+ , and CD8+cells and to the degree of detected fibrosis. Results: Portoenterosto my cores were heavily infiltrated by CD4 +, CD8+, and CD68+, compared with th e preoperative liver biopsy (P = .008, .004, and .017, respectively). Infants ha ving favorable outcome had more macrophage infiltration in portoenterostomy core compared with those having an unfavorable outcome (25.66 ±29.77 per HPF compar ed with 11.62 ±4.58, P = .000). Mean CD4+/CD8 +ratio was 1.54 ±1.37 in those who died within 18 months postoperatively and 0.733 ±0.48 in others (P = .021) . Conclusion: Immune-mediated destruction of portal tracts is an integral part of pathogenesis of EHBA.

关键词：肝外胆管闭锁 CD4 CD68 CD8 免疫介导预后价值肝损伤肝门肠吻合术纤维化程度肝实质

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The Global Soil Mycobiome consortium dataset for boosting fungal diversity research

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Fungal Diversity 2021年第6期111卷 573-588页

作者： Leho Tedersoo Vladimir Mikryukov Sten Anslan Mohammad Bahram Abdul Nasir Khalid Adriana Corrales Ahto Agan Aída-M.Vasco-Palacios Alessandro Saitta Alexandre Antonelli Andrea C.Rinaldi Annemieke Verbeken Bobby P.Sulistyo Boris Tamgnoue Brendan Furneaux Camila Duarte Ritter Casper Nyamukondiwa Cathy Sharp César Marín D.Q.Dai Daniyal Gohar Dipon Sharmah Elisabeth Machteld Biersma Erin K.Cameron Eske De Crop Eveli Otsing Evgeny A.Davydov Felipe E.Albornoz Francis Q.Brearley Franz Buegger Genevieve Gates Geoffrey Zahn Gregory Bonito Indrek Hiiesalu Inga Hiiesalu Irma Zettur Isabel C.Barrio Jaan Pärn Jacob Heilmann-Clausen Jelena Ankuda John Y.Kupagme Joosep Sarapuu Jose G.Maciá-Vicente Joseph Djeugap Fovo József Geml Juha M.Alatalo Julieta Alvarez-Manjarrez Jutamart Monkai Kadri Põldmaa Kadri Runnel Kalev Adamson Kari A.Bråthen Karin Pritsch Kassim I.Tchan Kęstutis Armolaitis Kevin D.Hyde Kevin K.Newsham Kristel Panksep Lateef A.Adebola Louis J.Lamit Malka Saba Marcela Eda Silva Cáceres Maria Tuomi Marieka Gryzenhout Marijn Bauters Miklós Bálint Nalin Wijayawardene Niloufar Hagh-Doust Nourou S.Yorou Olavi Kurina Peter E.Mortimer Peter Meidl RHenrik Nilsson Rasmus Puusepp Rebeca Casique-Valdés Rein Drenkhan Roberto Garibay-Orijel Roberto Godoy Saleh Alfarraj Saleh Rahimlou Sergei Põlme Sergey V.Dudov Sunil Mundra talaat Ahmed Tarquin Netherway Terry W.Henkel Tomas Roslin Vladimir E.Fedosov Vladimir G.Onipchenko WAErandi Yasanthika Young Woon Lim Meike Piepenbring Darta Klavina Urmas Kõljalg Kessy Abarenkov Mycology and Microbiology Center University of TartuTartuEstonia Institute of Ecology and Earth Sciences TartuEstonia Department of Ecology Swedish University of Agricultural SciencesUppsalaSweden Department of Botany University of the PunjabQuaid-e-Azam CampusLahorePakistan Centro de Investigaciones en Microbiología y Biotecnología-UR(CIMBIUR) Facultad de Ciencias NaturalesUniversidad del RosarioBogotáColombia Grupo de Microbiología Ambiental y BioMicro Escuela de MicrobiologíaUniversidad de Antioquia UdeAMedellínColombia Department of Agricultural Food and Forest SciencesUniversity of PalermoPalermoItaly Royal Botanic Gardens SurreyUK Department of Biomedical Sciences University of CagliariCagliariItaly Research Group Mycology Department of BiologyGhent UniversityGhentBelgium Department of Biomedicine Indonesia International Institute for Life SciencesJakartaIndonesia Plant Pathology and Agricultural Zoology Research Unit Department of Plant ProtectionFaculty of Agronomy and Agricultural SciencesUniversity of DschangDschangCameroon Department of Ecology and Genetics Uppsala UniversityUppsalaSweden Eukaryotic Microbiology University of Duisburg-EssenEssenGermany Department of Biological Sciences and Biotechnology Botswana International University of Science and TechnologyPalapyeBotswana Natural History Museum of Zimbabwe BulawayoZimbabwe Institute of Botany Czech Academy of SciencesPrůhoniceCzech Republic Center for Yunnan Plateau Biological Resources Protection and Utilization College of Biological Resource and Food EngineeringQujing Normal UniversityQujingPeople’s Republic of China Department of Botany Jawaharlal Nehru Rajkeeya MahavidyalayaPondicherry UniversityPort BlairIndia British Antarctic Survey NERCCambridgeUK Natural History Museum of Denmark University of CopenhagenCopenhagenDenmark Department of Environmental Science Saint Mary’s UniversityHalifaxNSCanada Altai State University BarnaulRussia CSIRO Land and Water WembleyWAAustralia Department of N

Fungi are highly important biotic components of terrestrial ecosystems,but we still have a very limited understanding about their diversity and *** data article releases a global soil fungal dataset of the Global Soil Mycobiome consortium(GSMc)to boost further research in fungal diversity,biogeography and *** dataset comprises 722,682 fungal operational taxonomic units(OTUs)derived from PacBio sequencing of full-length ITS and 18S-V9 variable regions from 3200 plots in 108 countries on all *** plots are supplied with geographical and edaphic *** OTUs are taxonomically and functionally assigned to guilds and other functional *** entire dataset has been corrected by excluding chimeras,index-switch artefacts and potential *** dataset is more inclusive in terms of geographical breadth and phylogenetic diversity of fungi than previously published *** GSMc dataset is available over the PlutoF repository.

关键词： Soil fungi Global dataset PacBio sequencing Fungal richness

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