This paper discusses the optimum condition for preparing carboxymethyl starch with high degree of substitution and high viscosity by using the solution isopropanol-water through etherification.
探讨了以异丙醇-水作溶剂，通过一次醚化，制备高取代度、高粘度羧甲基淀粉醚的最佳条件。
The technology of preparing sodium copper chlorophyllin from Banhinia purpurea linn leaves was studied. The optimum technological condition was found.
由羊蹄甲树叶提取叶绿素并经皂化、铜代及成盐反应制备叶绿素铜钠，研究探讨了优惠提取工艺条件和反应条件。
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