The Structure of a New Starch of High Amylose Content²

Structural Characterization of Amylopectin and Intermediate Material in Amylomaize Starch Granules

“…I and II in AAP was longer than found in WMS. Therefore, the present data seem to support the proposal by Wolff et al 6 ) that AAP has longer inner and outer branches than those of normal amylopectin, and lead to the hypothesis that the outer branches (A-chains in the Whelan's amylopectin mode1 54 ») of AAP molecule are fewer in number than found in the normal form.…”

“…3 and 4). (6) The average degree of polymerization of f3-limit dextrin from AIM is estimated to be around 100 glucose units (Table V). The unit-chain profile of this dextrin is characterized by the presence of only a single peak of the internal chain fraction with CL close to 80 (Figs.…”

“…In 1955, Wolff and his co-workers 6 ) first separated a 50% amylomaize starch into two components by I-butanol, examined each component, and demonstrated that AAP had longer inner and outer branches than those of normal amylopectin, postulating that the abnormal amylopectin was intermediate in structure between normal amylose and amylopectin fractions. Greenwood and Thomson 7 ) also obtained the long-branch amylopectin from 70% amylomaize starch, but pointed out that the amylopectin fraction could be further split into two components by differential ultracentrifut Dedicated to Professor Tatsuro Itoh on the occasion of his retirement from our laboratory.…”

Untersuchungen über die thermische Veränderung verschiedener Stärkearten und Amylopektin

“…Auf dieser Basis wurden die Bestimmungen mit der von WOLFF u. a. [24] beschriebenen. von uns modifizierten Methode auf folgende Weise durchgefiihrt.…”

Characterization and food applications of high amylose and other varieties of starch

“…Many reports have indicated the presence of a material having properties different from those of amylose and amylopectin so called the intermediate component , Peat et al 1952, Wolff et al 1955, Greenwood 1979, Takeda et al 1989b. The intermediate components displayed iodinebinding studies and by a yff-amylolysis limit between those of amylose and amylopectin.…”