石油醚

Key words stellera chamaejasmel L. the petroleum ether extract MTT antitumor activity in vitro in viˉvo

瑞香狼毒石油醚提取物具有较强的体内和体外抗肿瘤作用。

ConclusionIt is the first time that the petroleum ether extract and ethyl acetate extract of Nervilia foadii Schltr. are proved to be the effective anticancer fractions in vitro.

结论首次确定了青天葵的石油醚和醋酸乙酯部分是体外抗肿瘤作用的有效部位。

The main aim of this paper is research the technology that combine enzyme treatment and petroleum ether to extract the Jatropha curcas L.seed.

笔者对酶处理与石油醚浸出相结合提取麻疯树籽油脂工艺的研究。

Methods Silica gel column chromatography and PTLC were used to separate and purify the compounds from the petroleum ether soluble fraction of ethanol extract.

方法用硅胶柱色谱和制备薄层等方法从乙醇提取物的石油醚萃取部位分离化合物，通过波谱方法鉴定其结构。

The analgesic active substances of Meconopsis quintupcinervia Regel contain in ethanol extract mainly, then in petroleum ether extract.

五脉绿绒蒿的镇痛活性物质主要存在于乙醇提取物中，其次是石油醚提取物。

Among the five extracts, petroleum ether extract had the strongest contact toxicity and the adjusted death rates were 66.65% and 92.21% 24 h and 48 h after treatment with the concentration of 100 mgmL^(-1) and the LD50 were 76.07 mgmL^(-1)、14.94 mgmL^(-1) respectively.

其中，以石油醚提取物的触杀作用最强，处理后24、48h的校正死亡率分别为66.65%和92.21%，LD50分别为76.07、14.94mgmL^(-1)。

It is slightly soluble in ethyl ether, petroleum ether, benzene and chloroform.

在空气中易潮解，微溶于乙醚、石油醚、苯、氯仿，其水溶液碱性。

The effects of different entrainers(methanol,acetone,ethyl acetate,petroleum ether and ethanol of different concentrations) on the diosgenin extraction rate were studied.

探讨了乙醇、甲醇、丙酮、乙酸乙酯、石油醚作为夹带剂以及在无夹带剂的条件下，对薯蓣皂素收率的影响。

Methods The cultivated Cs fungus HK-1 and natural Cs were extracted with petroleum ether, ethyl acetate, ethanol, and water.

方法人工虫草菌HK-1与天然虫草分别用石油醚、醋酸乙酯、乙醇和水提取。

In this thesis we carried on the preliminary study to the extraction process of plant essential oil, and measured the biological activity of plant essential oil on red flour beetle, Tribolium castaneum and the housefly, Musca domestica vicina.

采用三因素四水平正交试验设计对植物精油进行提取工艺研究，最佳提取工艺条件是A_2B_3C_3，即50g供试植物加入1000ml水，水蒸气蒸馏120min后，用石油醚萃取，萃取液浓缩以后得到的精油可获最大收益。

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。