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ARS Home » Research » Publications at this Location » Publication #98658


item Knutson Jr, Clarence

Submitted to: Carbohydrate Polymers
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 8/10/1999
Publication Date: N/A
Citation: N/A

Interpretive Summary: Determination of the quantity and quality of amylose, the linear polymer fraction of starch, in starch samples is important to the starch industry because the amylose component strongly influences the properties of the starch in uses in the food processing industry as well as other industrial applications. The work reported in this manuscript provides information to permit more accurate determination of amylose quantity, and also provides data which aids in evaluation of amylose quality, specifically molecular size. This report will be primarily used by plant breeders for developing improved high amylose varieties of corn and by food technologists for evaluating ingredients used in food applications.

Technical Abstract: Evaluation of the variations in spectra of the amylose-iodine complex of starches and amyloses from various botanical sources provide a useful aid for identification and characterization of these substances. Variations in absorptivity, wavelengths of maximum absorbance, and the slopes of the absorbance peaks provide characteristic data for amyloses due to variations in amylose molecular weight and degree of branching.