نتایج جستجو برای: بستر sba

تعداد نتایج: 18877  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه بیرجند - دانشکده علوم پایه 1392

در این تحقیق، ابتدا پیش ماده روی از طریق اشباع سازی مرطوب بر روی بستر sba-15تثبیت شد و بعد از کلسینه شدن، کاتالیزور zno/sba-15(26%)حاصل شد. این کاتالیزور به وسیله تکنیک هایxrd ،tem ، bet، ir، uv-vis و pl شناسایی شد. الگوی xrd و تصویر tem مربوط به zno/sba-15 ساختار هگزاگونال منظم مزوحفره های سیلیکا را نشان می دهند. الگوی پراش اشعه ایکس فقط باپیک های غیر بلورین چهار چوب سیلیکا مطابقت دارد و پیک ه...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه الزهراء - دانشکده علوم پایه 1391

هدف این پروژه محافظت از گروه عاملی هیدروکسی در الکل ها و فنول ها در برابر کلیه واکنش-هایی که می توانند آن ها را تحت عمل قرار دهند. بدین منظور از روش آسیلاسیون به وسیله کاتالیزورهای نانو بر روی بستر sba-15 بهره جسته ایم. سه گونه کاتالیزوری که به کار گرفتیم شامل pd/al-sba-15، pd/sba-15 و moo3/sba-15 می باشد. دو گونه اول در شرایط بدون حلال و در دمای اتاق ولی moo3/sba-15 در حلال دی کلرو متان و در د...

Journal: :Blood 1985
W Ebell H Castro-Malaspina M A Moore R J O'Reilly

We report studies demonstrating the presence on human marrow stromal cells of binding sites for the soybean lectin (SBA). Marrow cells were separated by agglutination with SBA into an agglutinated cell (SBA+) fraction containing most mature hemic cells including T lymphocytes, and an unagglutinated cell (SBA-) fraction containing the hematopoietic stem cells. The vast majority of fibroblast col...

Journal: :Journal of the American Chemical Society 2003
Véronique Dufaud Mark E Davis

Catalytic materials bearing multiple sulfonic acid functional groups and positioned at varying distances from one another on the surface of mesoporous solids are prepared to explore the effects that the spatial arrangement of active sites have on catalytic activity and selectivity. A series of organosiloxane precursors containing either disulfide or sulfonate ester functionalities (synthons of ...

2010
Huayu Huang Yongsheng Ji Zhenfeng Qiao Chuande Zhao Jianguo He Haixia Zhang

Magnetic Fe-SBA-15 mesoporous silica molecular sieves were prepared, characterized, and used for magnetic separation. Wet impregnation, drying, and calcination steps led to iron inclusion within the mesopores. Iron oxide was reduced to the metal form with hydrogen, and the magnetic Fe-SBA-15 was obtained. Fourier-transform infrared spectroscopy confirmed the preparation process from the oxide t...

Journal: :Journal of agricultural and food chemistry 2010
Yating Ma Tong Wang

The main objective of this study was to eliminate the hemagglutination activity of an antinutritional factor in soybeans, soybean agglutinin (SBA). A series of experiments was designed to enzymatically modify SBA structure and to use other physical treatments to reduce activity. SBA extract was prepared from soy flour and used as the substrate for all treatments. Deglycosylation by enzyme decre...

2018
Li Pan Yuan Zhao Mohammed Hamdy Farouk Nan Bao Tao Wang Guixin Qin

Soybean agglutinin (SBA), is a non-fiber carbohydrate related protein and a major anti-nutritional factor. Integrins, transmembrane glycoproteins, are involved in many biological processes. Although recent work suggested that integrins are involved in SBA-induced cell-cycle alterations, no comprehensive study has reported whether integrins are involved in SBA-induced cell apoptosis (SCA) in IPE...

2015
Honglue Tan Shengbing Yang Pengyi Dai Wuyin Li Bing Yue

As a commonly used implant material, calcium sulfate cement (CSC), has some shortcomings, including low compressive strength, weak osteoinduction capability, and rapid degradation. In this study, silica-based mesoporous materials such as SBA-15 were synthesized and combined with CSC to prepare CSC/SBA-15 composites. The properties of SBA-15 were characterized by X-ray diffraction, transmission ...

Journal: :Asia-Pacific journal of public health 2015
Kanittha Chamroonsawasdi Malar Soe Phitaya Charupoonphol Suwat Srisorrachatr

A survey study aimed at identifying rates and predictive factors on utilization of skilled birth attendant (SBA) among pregnant women. A stratified random sampling technique was used to select 200 Myanmar women aged 18 to 49 years in Kalay Township. Data were collected by interview questionnaire from March 1 to 15, 2012, and data were analyzed by frequency, percentage, mean and standard deviati...

2017
Yohei Bamba Masahiro Nonaka Natsu Sasaki Tomoko Shofuda Daisuke Kanematsu Hiroshi Suemizu Yuichiro Higuchi Ritsuko K. Pooh Yonehiro Kanemura Hideyuki Okano Mami Yamasaki

Study Design We established induced pluripotent stem cells (iPSCs) and neural stem/progenitor cells (NSPCs) from three newborns with spina bifida aperta (SBa) using clinically practical methods. Purpose We aimed to develop stem cell lines derived from newborns with SBa for future therapeutic use. Overview of Literature SBa is a common congenital spinal cord abnormality that causes defects i...

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