摘要
Abstract
The rheological properties of starch pastes are important influencing factors of product quality of starch industry.The proso millet starch sample was prepared by alkaline process, basic physicochemical indexes were determined and compared to rice starch, corn starch and potato starch.Pasting properties and rheological behaviors of proso millet starch paste were studied at various shear rate and temperature ranges by the Brookfield rotating viscometer and Brabender Viscograph, in order to provide the theoretical basis of the application of proso millet starch in the food industry.Results indicate the residual protein content was 0.232％, the yield of starch was 58.6％, the amylose starch was 18.28％, the temperature of gelatinization was 73.9℃ and peak viscosity was 702BU.The cold proso millet starch paste had high stability, the setback capacity was weaker than potato, rice and corn starch.The starch pastes exhibits pseudoplastic fluid, shear - thinning and thixotropic characteristics.At the same temperature, the apparent viscosity was reduced when the shear rate increased; At the same shear velocity, the apparent viscosity was reduced while the temperature increased.关键词
黄米淀粉/Brabender糊化仪/流变特性/触变Key words
proso millet starch/ brabender viscograph/ rheological property/ thixotropic分类
轻工纺织
