提取

The antineoplastic effective parts of Plumbago zeylanica L.were chloroform and petroleum ether extracts.

白花丹氯仿提取部位、石油醚提取部位体外抗肿瘤作用较好，值得对其提取部位进一步分离纯化并研究其抗肿瘤作用机制。

The optimal hydrolysis conditions of pectin extracted from apple pomace from Luoyang Limin vinegar factory was investigated in this paper.

在料水比、pH值、提取时间和温度等因素对果胶提取得率影响研究的基础上，利用正交试验优化了提取工艺。

The optimum conditions for extraction was proved practicable by condition filtration and orthogonal design with supersonic wave method .The results showed that the optimum conditions for extraction to ultrasonic method is : methanol (φ=40,20ml),and 15℃ for 30 min ,this paper has determined nicotine contents that is 23.50mg/g at absorption peak (λ=262nm) by HPLC with an eluent consisting of methanol –potass Phosphate alleciate (pH=3) with the recovery and coefficient of variation are 101.52% and 0.91%.

通过超声波提取方法进行条件筛选和正交化实验，确定了烟草中尼古丁的最佳提取条件，结果表明，超声波最佳条件是：甲醇浓度40%，固液比1：20，提取时间30 分钟，超声温度15℃，用高效液相色谱方法在波长262nm 处测定尼古丁的含量，流动相组成为甲醇：磷酸二氢钾缓冲溶液=10：90，测得烟草中尼古丁的含量为23.50 mg/g，平均回收率为101.52%，相对偏差为0.91%。

In relation to the feature extracting, the first step is to extract the "simple" surfaces such as planes, natural quadric surfaces and tori. Planes considered as degenerated quadric surfaces, the quadric surface feature extracting should be more important in RE.

而在点云的特征提取中，首先提取的是包括平面、自然二次曲面(包括球面、圆柱面、圆锥面)和圆环面的"简单"曲面，我们认为平面是一种退化了的二次曲面，因此研究二次曲面特征的提取是其中首要的课题。

Objective To analyze the components of organic acids in the Radix Ranunculi Ternati from different methods. Methods With using 10%H2SO4-CH3OH as methyl esterification solvent, the analysis for organic acids were carried by using GC-MS . Results 46 components were determined.

目的 分析不同提取法提取的猫爪草有机酸部位的成分方法采用离子交换法提取分离水提液和醇提液中的有机酸，以10%硫酸甲醇溶液甲酯化试剂进行甲酯化，用气相色谱-质谱联用技术分析。

Methodsresearched the influences of solvent volume, extracting time and solvent ph value on extraction techniques for rauwolfia vomitoris afzel. with the water soluble alkaloids in extracts as index, the optimal condition by l9(34) orthogonal test was studied. the data obtained were analyzed for glm using sas 8.0 software package.

方法采用l9(34)正交实验，研究溶剂用量、提取时间、提取溶剂的ph条件3个因素对催吐萝芙木醇提工艺的影响，以提取物中的水溶性生物碱为指标，采用sas 8.0统计软件进行方差分析，得到最佳提取工艺。

Result:Compared with the conventional extracting process of single pot,the extracting process of pot groups dynamic refluence get higher pickup rate of effective components,save energy and shorten the period of manufacturing.

结果：罐组式动态逆流提取工艺与传统的单罐提取工艺相比较，有效成分提取率较高，并且节省能源、缩短生产周期。

the extracting process of leonurus with pot groups dynamic refluence and conventional single pot were tested.The content of effective components,technical parameters and economic indexes were determined.

分别用罐组式动态逆流提取与传统单罐提取工艺进行益母草提取试验，测定产品有效成分含量、各项工艺参数及经济指标。

ResultsThe extraction rate used the refluent method with 80% alcohol for three times and 1 h each time will be six times as much as that of other methods.

结果用6倍量80%乙醇回流提取3次（1 h/次）的提取方法可以获得较高的蛇床子素提取率。

An effective and simple method for total RNA extraction from rhizobium was described in this paper. The method had the acquirement of high RNA yields and was less expensive than other methods previously described.

0前言提取高纯度、完整的总RNA是对基因进行转录水平操作的基础，但不同生物往往因种属差异、材料内含物组份及含量的差异，而需要采用不同的RNA提取方法，对细胞组成成分复杂的生物物种，RNA的提取相对困难得多。

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％。