1) variable underflow(countercurrent extraction)
可变底流(逆流提取)
2) countercurrent extraction
逆流提取
1.
The results showed that the optimal conditions were as follows:countercurrent extraction of 4 levels,pH 9 at 80 ℃,with 1︰30 as the original ratio of material to solvent,and 30 min,20 min,15 min or 10 min as extracting time in respective gradient level.
以水为提取剂对米糠黄酮逆流提取,研究了该工艺中影响黄酮提取率的主要因素,得出了合理的操作参数,即提取温度80℃,提取液pH 9,最初料液比1 g︰30 mL,提取时间逐级为30、20、15和10 min的4级逆流提取,此时黄酮的提取率及原料、溶剂的利用率均最高。
2.
A new method of tea extraction was introduced,and analyzed the process of countercurrent extraction.
介绍了一种茶叶浸提的新方法,并对逆流提取的过程进行了分析。
3.
Objective:There were little lab-scale research on dynamic continuous countercurrent extraction from Traditional Chinese Medicine, so a lab-scale simulated method was put forward.
目的:针对目前极少实验室规模研究中药材多效动态连续逆流提取,提出一种实验室模拟方法,为该种方法的中试化奠定基础。
3) variable underflow
可变底流
4) continuous countercurrent extraction
连续逆流提取
1.
This article mainly aims at introducing the process,the structure and the characteristics of continuous countercurrent extraction.
介绍了连续逆流提取的工艺过程、主体结构及性能特点,并分析了其在实际应用中存在的一些优缺点。
2.
The method included 3 steps: continuous countercurrent extraction, column chromatography with 732 cation exchange resin, and crystallization, and their working parameters were optimized.
该方法包括连续逆流提取、732阳离子交换树脂柱层析和结晶三步。
3.
The principles of the continuous countercurrent extraction was reviewed, and the multi-stage tank-type, towline type and screw type and the present extracting conditions of natural product were introduced.
阐述了连续动态逆流提取的原理,介绍了罐组式、拖链型连通器式、螺旋式连续逆流提取设备以及连续逆流提取方法对天然产物的提取状况。
5) countercurrent extracting equipment
逆流提取设备
6) Multistage countercurrent extraction
多级逆流提取
补充资料：底流曲线
分子式：
CAS号：
性质：浸取操作中，当底流(under-flow)与溢流(overflow)逐级变化时，左图所示的曲线AB即为底流曲线。a代表溶质量，b代表固体量，s代表溶剂量，图中横坐标以表示。纵坐标以表示。由图知固体量与溶剂量之比是溶液浓度的函数。(图暂缺)
CAS号：
性质：浸取操作中，当底流(under-flow)与溢流(overflow)逐级变化时，左图所示的曲线AB即为底流曲线。a代表溶质量，b代表固体量，s代表溶剂量，图中横坐标以表示。纵坐标以表示。由图知固体量与溶剂量之比是溶液浓度的函数。(图暂缺)
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条