The degree of deacetylation of chitosan was determined directly by 1st derivative UV spectrophotometry using hydrochloric acid as solvent and N acetyl D glucosamine (ACGLSM) as standard.
以盐酸为溶剂，N 乙酰基D 葡萄糖胺为标准品，用紫外一阶导数光度法直接测定壳聚糖的脱乙酰度。
It defines n-ple derivative, n-ary absolutely continuous function, generalized n-ple primitive function and Newton n-ple integral.
定义了n重导数，n元绝对连续函数，广义n重原函数及牛顿n重积分。
Objective: To synthesize desloratadine and its N-formyl derivative.
前言：目的：合成地洛他定和n甲酰基地洛他定原料。
应用推荐