查询词典 extraction

Objective To analyze the chemical components of the extracts of Kacmpferia galanga L from supercritical CO2 extraction, and to compare the extraction efficiency between supercritical CO2 extraction and traditional water distillation.

目的 研究沙姜超临界CO2萃取物的化学成分，并比较超临界CO2提取法和传统的水蒸气蒸馏提取法的提取效果。

ConclusionMicrowave extraction has the highest yield in the shortest time. But volatile oil in Heracleum hemsleyanum Diels extracted by supercritical CO2 extraction or steam distillation has better quality. Thus the supercritical CO2 extraction is the best way.

结论微波萃取挥发油得率最高，时间最短；超临界CO2和水蒸馏法萃取挥发油的质量最好，因此使用超临界CO2是萃取牛尾独活挥发油的最佳途径。

The extraction temperature, extraction pressure and separation pressure all have significant effects on the extraction rate of indirubin.

萃取温度、萃取压力及分离压力对大青叶中靛玉红的萃取都有显著影响。

ResultsThe optimal conditions were as follows:raw material 0.500 g Ligustrum lucidum Ait dry dry powder,the extraction agent 45% alcohol solution,the ratio of raw material to extraction agent 1:50,the microwave power 464 W,and the extraction time 300 s for three times.

结果原料0.500 g的女贞子粉末，提取剂为45%的乙醇，提取剂用量为1∶50，微波功率为464 W，提取时间为300 s，提取3次为最佳的提取工艺。

First, this research developed a set of simple and effective technologies for preparative extraction and separation of flavonoid and phloridzin from Lithocarpus polystachyus, which includes:(1) Microwave-assisted extraction of flavonoid from tender leaves of Lithocarpus polystachyus Rehd. The extraction conditions are as the follows, 1.2 % of Ca2 water solution, solid-liquid ratio of 1:12, pre-boiling for 5 min, 800 W of microwave treating for 25 min.

本研究首先研发出一套简单、有效的制备性提取分离多穗柯黄酮类及其根皮苷工艺，这套工艺包括：(1)微波辅助氢氧化钙水溶液提取多穗柯黄酮，最佳工艺条件为用1.2 %氢氧化钙水溶液为提取液，料液比1：12，预煮时间5min，微波功率800W处理25min。

The application of ionic liquids aqueous solutions as solvents in the microwave-assisted extraction technique was developed for the extraction of lycorine, lycoramine and galanthamine from Lycoris. Effects of different ionic liquids and the concentration of selected ionic liquids on MAE were investigated, and tradition organic solvent and extraction techniques were compared.

1引言自1986年Ganzler等[1]首次报道采用微波辅助萃取天然产物中化学成分以来，微波辅助萃取技术在食品、环境和天然产物等领域得到了广泛的应用[2~5]，它以萃取时间短、溶剂用量少、选择性强、萃取效率高等优点在中药有效成分的萃取分离方面得到广泛关注[5，6]。

In the soft tissue measurements, the value of soft tissue facial angle and B'-Pos-FH in the first extraction group was less than those in the second extraction group significantly. After treatment all the patients had an increase in S-Ns-Pos angle, soft tissue facial angle, B'-Pos-FH and depth of mentolabial groove. At the same time, soft tissue convexity angle was diminished obviously. But the change was not significant between the two premolar extraction groups.

2在对软组织项目的测量中，治疗前第一前磨牙拔除组的软组织面角、颏沟倾角均小于第二前磨牙拔除组，治疗后2组均出现软组织面凸角减少，颏凸角、软组织面角、颏沟倾角、颏唇沟深度增加；但2组在各项测量项目的变化上无显著组间差别。

The orthogonal test design was used to arrange sequent experiments to test the effect of the three main factors including the proportion of fruit and water, microwave power and extraction time on the extraction efficiency of momordica charantia L and to establish optimal extraction process.

并采用正交试验法察了微波技术提取工艺中苦瓜投料物液比、波输出功率、取时间对提取效果的影响，优选出微波提取的最佳方案。

Combined with purifying using Spe-ed solid phase extraction Cartridges Octadecyl C18/18% and determining by reversed-phase high performance liquid chromatography, extraction effects by four kinds of extraction methods were studied.

结合固相萃取柱净化－HPLC测定技术比较了4种提取方法对土壤样品中吡虫啉的提取效果。

With Platycodon root as experiment material, on the base of single factor experiments (extraction time, extraction temperature and so on), then through the experimental design of response surface methology, the conditions of extraction are studied.

以桔梗为实验材料，在提取温度、提取时间、料液比等单因素实验的基础上，利用响应曲面实验设计法对桔梗皂甙提取条件进行研究，并通过回归方程和响应曲面，得到了最佳提取工艺。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。