期刊论文

中文

中南林业科技大学学报

1673-923X

2002

22

2

30-34

10.3969/j.issn.1673-923X.2002.02.011

湖南省自然基金重点项目 （编号 99JJ10 0 4）；

本校为第一机构

以茅栗等9种橡子为原料，提取出橡实淀粉，并分别用碘电位滴定法和Juliano比色法测定了直链淀粉含量，然后用正丁醇沉淀并经多次重结晶即可分离得到较高纯度的直链淀粉和支链淀粉，试验结果表明，各种橡实直链淀粉含量均在20％左右，而直链淀粉和支链淀粉得率分别为其直实含量的50％和40％左右，直链淀粉和支链淀粉的碘亲和力分别为18．94％－19．19％和0．35％－0．52％，蓝值分别在0．74－1．20和0．14－0．19之间，最大吸收波长分别在600－620nm和550－570nm之间，直链淀粉的纯度基本上都在95％以上。

Acorn starch is made from nine oak plants such as C.seguinii Dode and the amount of each amylose is measured by iodine voltage analysis and Juliano spectro photometric method. Highly purified amylose and amylopectin can be successively separated from acorn starch through 1 butnol precipitation and re crystallization. The results show that the amylose content of each acorn starch is 20% or so, whereas the yields of amylose and amylopectin are about 50% and 40% of their unfeigned contents; that for acorn amylose and amylopectin, the iodine affini...