With corn starch as material, hydroxyethylated starch was prepared by first hydrolysing the starchwith acid, then etherifying it with epoxyethane. 介绍了一种以玉米淀粉为原料，将淀粉用酸水解后与环氧乙烷进行醚化反应制备羟乙基淀粉的方法。
The purity of sialic acid, which is hydrolyzed from polysialic acid broth produced by Escherichia coli, was low and required to be further purified for commercial application. 摘要大肠杆菌发酵得到聚唾液酸，经酸水解后得到的唾液酸单体纯度较低，需进一步分离和纯化。
