Related Experiment Video
Updated: Apr 4, 2026

Analysis and Specification of Starch Granule Size Distributions
Published on: March 4, 2021
Thermal properties of barley starch and its relation to starch characteristics
Anna Källman1, Varatharajan Vamadevan2, Eric Bertoft2
1Department of Food Science, Swedish University of Agricultural Sciences, P.O. Box 7051, S-750 07 Uppsala, Sweden.
Abstract:
Amylopectin fine structure and starch gelatinization and retrogradation were studied in 10 different barley cultivars/breeding lines. Clusters and building blocks were isolated from the amylopectin by α-amylase from Bacillus amyloliquefaciens and their structure was characterized. Gelatinization was studied at a starch:water ratio of 1:3, and retrogradation was studied on gelatinized starch at starch:water ratio of 1:2, by differential scanning calorimetry. Three barley cultivars/breeding lines possessed the amo1 mutation, and they all had a lower molar proportion of chains of DP ≥38 and more of large building blocks. The amo1 mutation also resulted in a higher gelatinization temperature and a broader temperature interval during gelatinization. Overall, small clusters with a dense structure resulted in a higher gelatinization temperature while retrogradation was promoted by short chains in the amylopectin and many large building blocks.
More Related Videos
Related Concept Videos
Chemistry of Carbohydrates
Polymer Classification: Stereospecificity
Introduction to Carbohydrates
Physical Properties of Alkanes
Thermal Strain
Sugars as Energy Storage Molecules

