Conclusion: Silica gel column chromatography and crystallization are simple and rapid Methods: To isolate gardenoside.结论: 柱层析和重结晶方法是简单、速分离栀子苷的有效办法.This paper advances the preparation method of erucamide by direct ammonol...
有些植物在寒冷的气候条件下不能结果实.Some plants will not seed in a cold climate.科学家将研究各种树木，并观察哪些会结果实。The scientists will study the variety of trees and observe which are fruiting.他砍掉那些不结果实的植物。He cut down those acarpous plant....