【正文快照】: 二叠系最顶部的一个年代地层单位长期以来采用俄罗斯乌拉尔地区的鞑靼阶(Tatarian),然而,鞑靼阶在乌拉尔的典型剖面上为一套陆相地层,不含海相化石,因此,无法将其作为全球对比的标准。
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Tatarian Aster Root 紫菀 ; 紫菀粉末 ; 紫菀根
Tatarian maple 鞑靼槭
Tatarian Aster Root Radix Asteris 紫菀粉末
tatarian stage 鞑靼阶
tatarian dogwood 红梗木
The optimum extraction conditions of shionone from herbs Tatarian aster root were studied.
这研究了紫菀药材中挥发油酮的最佳提取条件。
OBJECTIVE The optimum extraction conditions of shionone from herbs Tatarian aster root were studied by means of orthogonal test and microwave-assisted and pressurized solvent extraction technique.
方法利用微波辅助加压溶剂提取法提取紫菀中紫菀酮,通过正交实验,考察了微波提取条件(包括溶剂、提取时间、提取次数和料液比)对紫菀中紫菀酮的影响。
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