【摘要】 用重结晶法可以得到纯度较高的芋头直链淀粉和支链淀粉。直、支链淀粉的蓝值分别是1 1 8和 0 2 0 ,λmax分别为 61 4nm和 5 87nm ,芋头淀粉中直链淀粉含量为 1 4 7%。高效液相色谱表明 ,芋头支链淀粉的分子质量具有较宽的分布 ;重均聚合度 ,大米支链淀粉 >芋头直链淀粉 >大米直链淀粉 >芋头支链淀粉 ;分散度 ,芋头支链淀粉 >芋头直链淀粉 >大米直链淀粉 >大米支链淀粉 ;芋头支链淀粉中 ,长支链所占比例 >短支链 ;分散度 ,长支链 >短支链。更多还原

【Abstract】 Highly purified amylopectin and amylose from taro starch could be obtained by re-crystallization. Taro amylose and amylopectin exhibited blue values of 1.18 and 0.20 and λ max of I-KI blue color at 614mm and 587mm respectively. Amylose content of taro starch was 14.7%. Results of gel permeation chromatography (GPC) showed that taro amylopectin molecular weight had a wide distribution in the GPC profile. For DP w the following sequence was observed: rice amylopectin>taro amylose>rice amylose>taro amylopectin. As regards to dispersion, Taro amylopectin>taro amylose>rice amylose>rice amylose. For taro amylopectin, both the dispersion and the proportion of long-branch chains were greater than those of short-branch chains.更多还原