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An investigation of the polysaccharide content of oats, Avena sativa L.
Author(s) -
Anderson D. M. W.,
Greenwood C. T.
Publication year - 1955
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.2740061006
Subject(s) - avena , starch , amylose , polysaccharide , amylopectin , chemistry , chromatography , potassium , sugar , iodine , potentiometric titration , biochemistry , food science , botany , organic chemistry , biology , ion
Abstract A graded extraction procedure has been applied to the polysaccharides present in the kernels of oats, Avena sativa L. Analyses of the sugar, protein and ash content of the fractions obtained are reported. A method for the purification of the starch present in the kernels is given. Oxidation of the unfractionated starch with potassium metaperiodate showed that the ratio of terminal to non‐terminal glucose units was 1 to 27.4. Differential potentiometric iodine titrations indicatied the presence of 26.0% of amylose in the starch, and hence the average length of unit‐chain in the amylopectin component was calculated to be 20.3 glucose units. Examination of the impure intermediate starch products showed that the protein impurity interfered considerably with the interaction of the starch with potassium metaperiodate.