在线词典

分类:语言工具
在线词典,是一款在线使用的中英文查词词典。本工具支持查询英文和中文单词及词组的含义,查询效率高、结果丰富,包括单词变体、常用短语、英英释义、同义词、同根词、词语辨析等,是外语学习者必备的在线查词工具。

Using Orthogonal Design Method


网络释义
采用正交设计方法
Objective:To optimize the extraction process of Bushen Tongbi Granuls.Methods: Using orthogonal design method,to apply extract yield of Rhizoma Coptis and the extract amount of berberine hydrochloride as observing indexes,to measure the content of dl-tetrahydropalmatine with HPLC.Results:The optimum extraction process was as follows,adding 8 times of 50%alcohol into coptis meal,refluxing and extracting for 2 times,one hour every time.Conclusion: This optimized process is simple,stable and efficient.
* 以上查询结果来自于网络,仅供参考。
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