Authors: C S Raina S Singh A S Bawa D C Saxena
Publish Date: 2006/02/11
Volume: 223, Issue: 4, Pages: 561-570
Abstract
Starches from broken rice grains derived from three varieties PUSA44 PR106 and PR114 were modified by hydroxypropylation with propylene oxide and esterification with adipic acid anhydride and/or vinyl acetate Degree of substitution and acetyl contents in parentheses was relatively low ranges between 002 053 and 012 309 for hydroxypropylated crosslinked and acetylated starch samples The acetylation and dual modification of starches increased the paste clarity solubility swelling power sediment volume and gel strength but decreased the gel elasticity in all the three varieties However the adhesiveness increased only upon dual modification in PUSA44 and decreased in other two varieties Crosslinking reduced the solubility swelling power sediment volume and gel elasticity while increased the paste clarity gel strength and adhesiveness The physicochemical characteristics of relatively high amylose variety PUSA44 among three varieties were significantly lower than those from varieties with low amylose content whereas PUSA44 had shown improved gel properties as compared to other two varieties
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