نتایج جستجو برای: سیلیکای مزومتخلخل sba
تعداد نتایج: 2768 فیلتر نتایج به سال:
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 ...
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...
امروزه مواد مزومتخلخل دارای هندسه منظم به دلیل توانایی و کارایی گستردهشان توجه بسیاری از دانشمندان و پژوهشگران را به خود جلب نموده است. در سالهای اخیر استفاده از مزومتخلخل سیلیکا در زمینه دارویی و پزشکی به دو دلیل: توانایی بازسازی بافت استخوان و توانایی های حمل دارو بررسی شده است. اصلاح سطح نانوذرات مزومتخلخل سیلیکا به منظور بهبود خواص فیزیکی و شیمیایی آن ها انجام میشود. در این پژوهش، نانوذر...
در پژوهش حاضر پودر مزومتخلخل اکسید تنگستن به روش قالبگیری نرم بامکانیزم خودچینشی القا شده توسط تبخیر[1] و با استفاده از پیشمادهی تنگستیک اسید و قالب آلی P123 سنتز شد. به منظور بررسی فازی، آنالیز پراش اشعهی ایکس (XRD) پس از کلسیناسیون پودر به مدت 1 ساعت در دماهای 220، 450 و 500 انجام شد. طیف سنجی تبدیل فوریهی مادون قرمز (FTIR) خروج قالب آلی پس از کلسیناسیون در دمای 450را تأیید کرد. آنالیز ج...
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...
An oxygen-evolving photosynthetic reaction center complex (PSII) was adsorbed into nanopores in SBA, a mesoporous silica compound. We purified the dimer of PSII complex from a thermophilic cyanobacterium, Thermosynechococcus vulcanus, which grows optimally at 57 °C. The thermally stable PSII dimeric complex has a diameter of 20 nm and a molecular mass of 756 kDa and binds more than 60 chlorophy...
Carbon spheres and tubes were formed from acetylene decomposition on SBA-15 and Ni-SBA-15 at 650-850 °C. At 650 °C, the decomposed carbons covered the surface of the support, and no carbon spheres and filament materials were formed. Carbon sphere formation occurred at 750 °C-850 °C; with diameters ranging from 0.8 μm-1.1 μm. For Ni-SBA-15, the diameters of the spheres and filaments were 0.8 μm ...
In the present work, mesoporous SBA-15 and SBA-16 were synthesised using classical methods, and their physicochemical properties were investigated by X-ray diffraction (XRD), FTIR, TEM and N2 adsorption-desorption. Rhodium (Rh, 1 wt %) was loaded on the mesoporous SBA-15 and SBA-16 by an impregnation method. The Rh surface coverage, dispersion and crystallite size were determined by room temper...
BACKGROUND Catalytic deoxygenation is a prominent process for production of renewable fuels from vegetable oil. In this work, deoxygenation of technical grade methyl oleate to diesel fuel aliphatic hydrocarbons (C15 - C18) is evaluated with several parameters including temperature, hydrogen pressure and reaction time in a stirred batch reactor over Pd/SBA-15 catalysts. RESULTS Two different S...
This paper examines the impact of government guaranteed small business loans on economic growth, and whether government guaranteed loans crowd out new businesses financed through the market. OLS estimates indicate a significant and positive relation between the Small Business Administration’s (SBA) guaranteed loans and metropolitan growth between 1993 and 2002. However, endogeneity hinders caus...
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