نتایج جستجو برای: age determination
تعداد نتایج: 995041 فیلتر نتایج به سال:
در این مطالعه در پلیمر حساس به دما با استفاده از پلیمریزاسیون محلول n- ایزو پروپیل آکریل آمید با وینیل استات و آلیل گلایسیدیل اتر ایمینو اسید(age- ida) توسط واکنش جانشینی حاصل شد. پلیمریزاسیون در حضور دی اتیل اتر و 2،2’- آزوبیس بوتیرونیتریل(آغازگر) و در دمای c°70 انجام شد. هر دو پلیمر سنتزی در این دما یک فاز قابل جداسازی را از خود نشان می-دهند؛ در ادامه رفتارهای پلیمر مشتق شده از age/ ida در جذ...
The rich star clusters in the Large Magellanic Cloud (LMC) are ideal for studying the process of star formation. Here we focus on the determination of age spreads amongst the massive stars in two young clusters , NGC1818 and NGC1805. We present colour magnitude diagrams (derived from HST data) for these clusters, and discuss the difficulties in age spread determination.
the present study aimed at investigating the relationship between iranian efl teachers’ classroom management orientations and their teaching styles. additionally, the difference between male and female teachers’ teaching styles and classroom management orientations and their relationship with experience and age were explored. three hundred efl teachers filled in attitudes and beliefs on classro...
The rich star clusters in the Large Magellanic Cloud (LMC) are ideal for studying the process of star formation. Here we focus on the determination of age spreads amongst the massive stars in two young clusters , NGC1818 and NGC1805. We present colour magnitude diagrams (derived from HST data) for these clusters, and discuss the difficulties in age spread determination.
a novel silver (ag) nanocomposite electrode was proposed that fabricated from metal nanostructures and ionic liquids. the combined application of unique properties of nanomaterials and ionic liquids in the design of this ag nanocomposite results in electrodes with interesting advantages compared to the conventional metal disk electrode. in the first part of this thesis, the elecrocatalytic eff...
a simple, sensitive and selective method for solvent extraction and spectrophotemetric determination of lanthanum (ii) europium (iii), and cerium (iii) is described , the rare earth metals are extracted into chloroform solution of n-phenylbenzohydroxamic acid (pbha) at ph 9-10 various parameters are studied to optimize the extraction conditions. the molar absorptivity is found to increase from ...
disorder. At clinical examination, the patient demonstrated a development of secondary sexual characteristics compatible with her chronological age. At gynecological examination a grooved urethra with elevated edges was observed. Speculum examination was not performed. Transabdominal ultrasonography did not demonstrate the presence of uterus and ovaries in their habitual site, but the study was...
Pathologic angiogenesis mediated by abnormally polarized macrophages plays a central role in common age-associated diseases such as atherosclerosis, cancer, and macular degeneration. Here we demonstrate that abnormal polarization in older macrophages is caused by programmatic changes that lead to reduced expression of ATP binding cassette transporter ABCA1. Downregulation of ABCA1 by microRNA-3...
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