Difference in viscosity among narrow-distribution polystyrenes of comparable molecular weight
نویسندگان
چکیده
منابع مشابه
Revisiting molecular weight distribution of polystyrenes using adsorption high-performance thin-layer chromatography
A repeatable separation of polystyrenes according to MW, from 1920 to 520000 u.m.a, has been obtained under adsorption conditions using a method that comprises the use of Lichrospher HPTLC plates, and a controlled, isocratic elution with a 78:22 (v/v) mixture of cyclohexane (Cy)-tetrahydrofuran (THF). Likewise, UV-densitometric quantification of polystyrenes in mixtures can be achieved, by an i...
متن کاملa study of relationship between knowledge sharing and organizational agility among personnel in esfahan power electric distribution company
پژوهش حاضر به بررسی رابطه بین تسهیم دانش و چابکی سازمانی در شرکت توزیع برق استان اصفهان پرداخته است . ابزار سنجش در این پژوهش پرسشنامه می باشد . به منظور سنجش متغیر تسهیم دانش از پرسشنامه وانگ و وانگ و جهت سنجش چابکی سازمانی از پرسشنامه چاربونیر استفاده شده است . هدف پژوهش حاضر تحلیل رابطه میان تسهیم دانش و چابکی سازمانی از دید کارکنان شرکت توزیع برق استان اصفهان می باشد . جامعه آماری این پژوه...
15 صفحه اولDe novo synthesis of a narrow size distribution low-molecular-weight heparin.
Heparin, a commonly used anticoagulant drug, is a mixture of highly sulfated polysaccharides with various molecular weights (MWs). The unique sulfation pattern dictates the anticoagulant activity of heparin. Commercial heparins are categorized into three forms according to their average MW: unfractionated heparin (UFH, MWavg 14,000), low-MW heparin (LMWH, MWavg 3500-6500) and the synthetic pent...
متن کاملMolecular Viscosity Distribution in the Left Coronary Artery Tree
The purpose of this study is to elucidate, probably for the first time, the distribution of the molecular viscosity in the entire Left Coronary Artery (LCA) tree. A three-dimensional computer model of the normal LCA tree, reported previously, was adopted for subsequent numerical analysis. The governing mass, momentum and energy flow equations were solved using a previously validated numerical (...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Polymer Science: Polymer Physics Edition
سال: 1974
ISSN: 0098-1273,1542-9385
DOI: 10.1002/pol.1974.180120117