نتایج جستجو برای: پلیلاکتیک co گلیکولیک اسید

تعداد نتایج: 353536  

1995
Kathryn Rumbold

Cape Dorset is a community on BaSn Island in Canada's Northwest Territories. An art co-operative the West Baffin Eskimo Co-operative (W.B.E.C.) was formed there in 1959 to encourage the production of drawings, prints, sculpture, and other handicrafts. The Co-operative purchases hundreds of drawings from artists annually and selects and translates some of these into prints for its yearly collect...

2002
Franz Lehner Holger Nösekabel Hans Lehmann

This paper outlines the components of a mobile education system and lists selected examples of universities employing m−education. Several possible approaches in designing and installing such a system are discussed. The main focus is on the project WELCOME (Wireless E−Learning and Communication Environ− ment) at the University of Regensburg. We argue that mobile/electronic education should not ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علم و صنعت ایران 1379

تهیه هیدروکربنها از مخلوط گازی h2/co به وسیله تماس این مخلوط در درجه حرارت و فشار بالا 180 تا 230 درجه سانتیگراد و 5 تا 30bar )با یک کاتالیست مناسب را سنتز فیشر- تروپش می نامند. در پروژه حاضر فرآیندهای ساخت کاتالیست های مناسب برای تهیه هیدروکربنها از مخلوط گازی مونوکسید کربن و هیدروژن مورد مطالعه قرار گرفته است . یک سری از کاتالیستهای co-zro2/sio2 که در آنها درصد جرمی کبالت یکسان (15wt%) ولی در...

2010
Mikhail A. Babin Sergei O. Kuznetsov

The problem of recognizing whether a subset of attributes is a pseudo-intent is shown to be coNP-hard, which together with the previous results means that this problem is coNP-complete. Recognizing an essential intent is shown to be NP-complete and recognizing the lectically largest pseudo-intent is shown to be coNP-hard.

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

در این تحقیق، تاثیر نانو سریای اضافه شده بر ساختار و فعالیت نانوپروسکیت lacoo3، تهیه شده به صورت lacocexo(3+?) که در آن x مقادیر 0/0، 1/0، 2/0، 3/0، 4/0 و 5/0 است، به عنوان کاتالیزور مبدل برای تبدیل آلاینده های خروجی از اگزوز خودروها به ترکیبات بی ضرر دی اکسیدکربن و آب بررسی شد. این کاتالیزور ها به روش سیترات تهیه شدند. به طور خلاصه ابتدا محلولی از مقادیر مولی مناسب از نیترات های فلزی و اسید سی...

Journal: :physiology and pharmacology 0
maryam anjomshoaa khadije karbalaei shahnaz razavi mohammad mardani somayeh tanhaei mohammad hossien nasr esfahani dept. stem cells, royan institute, tehran, iran

introduction: the aim of this study was evaluate the ability of notochord to induce neural induction and/or differentiation of mouse embryonic stem cell to neuron and motor neuron, respectively. methods: in order to produce embryoid bodies, es cells line royan b1 were grown in suspension in the absence of lif for 4 days. ebs were divided into 4 groups. ebs in group 1 & 2 were further cultured i...

Journal: :iranian biomedical journal 0
حسن هاشمی hassan hashemi مژده صالح نیا mojdeh salehnia مروارید کمالی morvarid kamali ماندانا بیگی بروجنی mandana beigi boroujeni

background: this study was undertaken to establish the characterization of cultured oral mucosal epithelium and introducing them as an alternative source for reconstruction of ocular surface disease. methods: human oral epithelial cells were cultured on simple media (dmem/hf12) as control and co-cultured on mitomycin c-treated 3t3 feeder layer, on the amniotic membrane (am) without nitrocellulo...

Journal: :acta medica iranica 0
giti shams department of psychiatry, roozbeh hospital, tehran university of medical sciences. tehran, iran. elham foroughi department of psychology, school of behavioral science, university of melbourne, melbourne australia. yaghoob esmaili department of psychology, rodhen azad university, tehran, iran. homayoon amini department of psychiatry, roozbeh hospital, tehran university of medical sciences. tehran, iran. narges ebrahimkhani department of psychiatry, roozbeh hospital, tehran university of medical sciences. tehran, iran.

recent epidemiological studies show that obsessive-compulsive disorder (ocd) and its comorbidity with psychiatric problems is more prevalent among children and adolescents than was previously believed. the primary aim of the current study is to investigate the point-prevalence rate of obsessive compulsive symptoms in a sample of adolescent high school student in iran. a two-stage epidemiologica...

ژورنال: :international journal of new chemistry 0

abstract: systematic studies on the substituent effect in para substituted fe(co)4–pyridine complexes have been studied on the basis of dft quantum-chemical calculations. the following substituents were taken into consideration: no2, cn, cho, f, h, ch3, and oh. additionally, the fe–n and fe–c bonds were characterized on the basis of atoms in molecules topological analysis of electron density. i...

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