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Starch Hydrolysates with Very Low Degrees of Polydispersity
Author(s) -
Çőrüşlü E.,
Pekin B.
Publication year - 1983
Publication title -
starch ‐ stärke
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.62
H-Index - 82
eISSN - 1521-379X
pISSN - 0038-9056
DOI - 10.1002/star.19830350309
Subject(s) - dispersity , hydrolysis , starch , hydrolysate , chemistry , ethanol precipitation , molar mass distribution , enzymatic hydrolysis , acid hydrolysis , precipitation , polysaccharide , chromatography , ethanol , organic chemistry , polymer , physics , meteorology
Acidic hydrolysis of starch, in contrast to enzymatic hydrolysis, gives a very low degree of multiple attack. By making use of this property it seems possible to prepare polysaccharide mixtures with very narrow ranges of molecular weight distribution. In a commercial sample of soluble starch the ratio of weight to number average molecular weights (M̄w/M̄n), which is a direct measure of polydispersity, is decreased from 3.1 to 1.2 by acid hydrolysis followed by ethanol‐water precipitation.