提取

Oil and cyanogenic glycosides were extracted simultaneously from flaxseed by two-liquid-phase system of ethanol-hexane-water.

采用正己烷-乙醇-水三元双液相体系进行同时提取亚麻籽中油脂和脱除氰苷的研究，通过单因素试验和响应面分析进行优化，确定的优化提取条件为：料醇比为1∶3.4；料烷比为1∶5.4；提取时间为78.5 m in；N aOH浓度为0.12%；温度为55℃；乙醇浓度为85%。

The invention discloses a method for extracting polysaccharide from chiretta and an application, which comprises breaking dry chiretta via a breaker into powder, arranging into an extraction pot, adding ligarine to reflux and defat, adding distilled water into defatted residues to extract, processing alcohol precipitation and centrifugation to obtain deposits, removing protein, processing acid hydrolysis and gel chromatography separation, freezing and drying to obtain active chiretta polysaccharide.

本发明公开了一种从当归中提取多糖的方法及应用。干燥当归用粉碎机粉成粉末，置入提取罐中，加入石油醚回流脱脂，向脱脂后的残渣中加入蒸馏水提取，醇沉、离心得沉淀，除去蛋白、酸解、凝胶色谱分离、冷冻干燥得到活性当归多糖。

In the air samples ,di(2-ethylhexy) phthalate,di-n-butyl phthalate and dioctyl phthalate were included,while diethyl phthalate,di(2-ethylhexy) phthalate,dipropyl phthalate,butyl benzyl phthalate,dioctyl phtha...

大气环境样品中邻苯二甲酸酯类化合物的预处理主要采用的是索氏提取、溶液提取和填充柱分离；水环境样品中采用的前处理技术较多，但大多数都是萃取技术；底质和生物试样目前用的较多是微波萃取、超声波萃取和索氏提取。

Methods:the thin layer scanning method was used to determine the content of ellagic acid.

选用4因素3水平正交表l9(34)，以薄层扫描法测定鞣花酸含量，考察4个因素（溶剂类型，提取时间，提取次数，溶剂用量）、3个水平对鞣花酸提取率的影响。

Methods The orthogonal test was conducted to test the effect of the temperature of extraction, time of extraction, concentration and volume of ethanal on extracts yield and the content of hypericins and and total flavonoids from Hypericum perforatum L., and optimize the extraction technology.

方法以总金丝桃素含量、总黄酮含量及浸膏得率为指标，采用正交试验法对提取过程中提取温度、提取时间、乙醇浓度及乙醇用量4个因素进行优选研究。

MethodsWith the extraction rate of polysaccharides as an examinable target , the optimal extraction conditions of polysaccharides has been proposed by microwave-assisted method through single factor experiment and orthogonal test method .

方法应用微波辅助提取技术，通过单因素和正交实验，以土茯苓多糖提取率为指标，筛选土茯苓多糖的最佳提取工艺条件。

China Aero Geophysical Survey and Remote Sensing Center for Land and Resources,Beijing 100083,ChinaIt is a difficult task for shadow and feculent water area processing when extracting water body from remote sensing image by traditional methods.Light Laser Detection and Ranging is robust to gain point cloudy data from shadow and feculent water as it has less affection from that area.However,the point cloudy data is always with low resolution which results to contour line with low accuracy.

从遥感影像中提取水体的传统方法在阴影处和水体浑浊处存在一定局限；机载激光雷达获取点云数据时水体受阴影和浑浊的影响小，因此使用点云数据提取水体比使用影像数据更加稳健；但点云数据的分辨率低，所提取的轮廓线精度不高。

A new microwave heating extraction method replacing the conventional circumfluence is described, the flavonoids in flammulated coat onion samples has been determined with the use of spectrophotometry.

利用微波加热溶出代替常规回流提取方法，对红皮洋葱样品中黄酮类化合物进行了微波溶出—分光光度法测定，与常规方法做了对照，并讨论了微波功率、微波时间、浸提剂浓度、料液比等因素对溶出结果的影响，通过正交试验，确定了最佳工艺条件为：微波功率900W，微波提取时间5min，提取溶剂80%乙醇，料液比为1∶10。

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。

The relation between the concentration of gingerol and extraction time, size of herb particle and the extraction temperature are discussed respectively.

讨论了当一种条件改变时，姜辣素的提取速率与提取时间、药材粒度、提取温度等因素的关系。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。