نتایج جستجو برای: average molecular weight
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ارزش نانوایی صفت پیچیده ای بوده و فاکتورهایی از جمله کمیت و کیفیت پروتئین گلوتن در آن دخیل است. گلوتنین های دانه گندم را می توان از نظر وزن مولکولی به دو گروه گلوتنین با وزن مولکولی بالا و گلوتنین با وزن مولکولی پایین تقسیم بندی نمود که زیر واحد سنگین تاثیر بیشتری در کیفیت نانوایی دارد. به منظور بررسی تنوع ژنتیکی ژن glu-1 (گلوتنین زیر واحد سنگین) تعداد 100 رقم گندم مورد کشت در ایران شامل ارقام ...
Ethanol organosolv lignin separated from bamboo was depolymerized by low-power microwave radiation (~80 W) using ethanol as a swelling agent and formic acid as a hydrogen donor solvent. After increasing the temperature from 100 to 200 °C, the total amount of phenolic compounds in the products increased from 8.1% to 40.8%, and both the weight average molecular weight (Mw) and number average mole...
Estolides are a relatively new class of biobased materials, and their properties not thoroughly investigated. Since they have been recently commercialized as lubricants, deeper investigation viscosity was warranted. Five 3-parameter models with theoretical derivations were found in the literature. Additionally, several empirical 2- models, including one 4-parameter model, used to describe lipid...
The flocculation performance of three poly(acrylic acid) (PAA) samples (Mw = 9 10, 2.5 10 and 1 10 g/mol) has been investigated. Colloidal alumina particles were used as a model system and tests were performed at pH 5. Using a singlecomponent polyacid, it was found that the optimum dosage required to achieve supernatant clarity was similar between the 9 10 g/mol PAA (23 ppm) and 2.5 10 g/mol PA...
Dextran is a branched polysaccharide composed of about 200,000 glucose units. The glucose units in the main chain are bound together by 1:6 glucosidic linkages. A special strain of lactobacilli (lenconostoc Mesenteroides) converts sucrose to a highly linear dextran molecule which has a molecular weight of approximately 40 million. By means of partial acid hydrolysis and subsequent differential ...
For improving the mechanical and thermal properties of polyurethanes based on glycidyl azide polymer (GAP), a series of polyurethane elastomers with two soft segments were prepared from hexamethylene diisocyanate (HDI) / (GAP) / (PPG) /TMP and isophorone diisocyanate (IPDI) / GAP/ PPG/ TMP formulation. The weight ratio of soft segments GAP/PPG in polyurethane samples is changed as following ord...
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