petroleum ether

effect of petroleum ether insoluble fraction of hibiscus rosa sinensis flowers ( hr-2) on human trophoblast cells and uterus activity of mice in vitro

扶桑花醚不溶物HR-2对体外培养的人绒毛膜组织及小鼠离体子宫活动力的影响

Three ethanol extraction of crude extract were extracted with the liquid-liquid partition method, by toxicity bioassay of PWN, petroleum ether extracts of the root crude ethanol extracts had the highest toxicity to PWN. 3.

用液-液分配法对3种乙醇粗提取物进行萃取分离，对松材线虫进行毒性生测，结果表明，根的乙醇粗提取物的石油醚萃取物对松材线虫的毒性最高。

This text adopt at first petroleum ether go on and draw and study sour esterses to the fruit pigment of madder under the same terms second acetone ethanol, Select the best solvent.

采用以水、乙醇、丙酮、乙酸乙酯、石油醚作为溶剂在相同的条件下对茜草果实色素进行提取研究，选最佳溶剂。

After that, extracting by petroleum ether, ethyl-acetate and normal butanol orderly and finally isolating a compound from the crude extracts by the separation methods and technological means of column chromatography, thin-layer chromatography ( TLC) and recrystal.

用石油醚、乙酸乙酯、正丁醇依次萃取。采用柱色谱法、薄层色谱法、重结晶等分离方法和技术手段，从粗提物中提取分离出1个化合物。

Result: Two compounds were isolated from the petroleum ether and ethyl acetate fractions of the flower and identified as tetracosanoic acid and quercitrin.

结果：从合欢花石油醚和乙酸乙酯部分得到2个化合物，鉴定为二十四烷酸和槲皮甙。

Method: To get the extracts of Spora Lygodii using methanol, chloroform and petroleum ether as solvent and the extracts were identified 、 analyzed by X-ray diffraction Fourier fingerprint spectra.

方法：以甲醇、氯仿、石油醚为提取溶剂，提取中药材海金沙，采用粉末X射线衍射Fourier谱鉴定法对提取物进行分析鉴定。

The antifeedant ratio of ethyl acetate extract to Spodoptera litura ( Fabricius) was higher than that of petroleum ether extract and normal butanol extract.

乙酸乙酯对斜纹夜蛾的拒食率都高于石油醚萃取物和正丁醇萃取物，三种不同萃取物拒食率次序是：乙酸乙酯正丁醇石油醚。

The petroleum ether fraction was analyzed by GC/ MS resulting in the identification of 15 acyclic compounds, 6 other chemical constituents including terpenoid and sterol.

运用GC/MS分析技术从石油醚相中鉴定了15个脂肪酸类化合物，6个倍半萜及甾体类等化合物。

Studies on the Chemical Constituents of Petroleum Ether Extract of Lagerstroemia speciosa ( Linn.) Pers Leaves

大花紫薇叶石油醚部位的化学成分研究

They are also employed to determine the density of gasoline . Kerosene, vegetable oil and petroleum ether.

轻于水的,用以测定甲醇、乙醇、乙醚等水溶液;以及汽油 、 煤油、植物油、石油醚等液体之密度.

Cinnamon twig was identified with petroleum ether ( 60-90)-ethyl acetate ( 17:3) as developer and dinitrophenylhydrazine ethanol solution as coloration using silica gel G.

桂枝：采用硅胶G板，以石油醚（60-90℃）&醋酸乙酯（17：3）为展开剂，显色剂为二硝基苯肼乙醇试液。

The paper suggests that the extraction of petroleum ether, polysaccharide and sodium copper chlorophyllin from banana leaves can be exploited as dishware abluent or abluent – assistants.

因此，从泡沫性能、表面张力、去污力三个方面，本研究认为香蕉叶石油醚抽出物、叶多糖和叶绿素铜钠盐可以开发作为餐具洗涤剂或洗涤助剂。

Study on chemical constituents of petroleum ether extract from the seed of Fagopyrum esculentum

荞麦籽粒石油醚萃取物化学成分的研究

The cultural fruiting bodies of the Gymnopilus spectabilis were phytochemical investigated using layer extracts with petroleum ether, diethyl ether, methanol and water and silica gel chromatography.

本研究采用石油醚、乙醚、甲醇、水溶剂梯度提取法和多种柱层析法，对栽培橘黄裸伞子实体进行了化学研究。

Use chloroform, petroleum ether and absolute alcohol as extract, and set out the extractive with UV spectrum.

方法：用氯仿、石油醚、无水乙醇三种常用溶剂做提取液，提取物用紫外光谱法测定。

Compared the spectrogram , that the petroleum ether used as solvent is better than anther.

通过气相色谱分析的谱图比较, 发现石油醚的提取效果较好.

The fluorescence parameters of the chloroform extract and petroleum ether extract of two groups of vitrinoid of somewhat similar coalification are studied.

作者研究了煤化度相近的两组煤镜质组氯仿抽出物及其石油醚抽出物的萤光参数。

ObjectiveTo investigate and compare the best extraction method by petroleum ether from Curcuma wenyujin Y . H.

目的探讨并比较石油醚回流提取温莪术粗粉和微纳米粉体挥发油的最佳工艺.

ResultsThe petroleum ether fraction and ethyl acetate fraction from the aqueous and ethanol extracts of Hehuanhua can significantly shortened immobility time of mice in the forced swimming test.

结果合欢花醇提物与水提物的石油醚和醋酸乙酯萃取部位与对照品安拿芬尼类似，均能显著缩短小鼠游泳的不动时间。

The contents of petroleum ether extract of the mixed sample were higher than of C3F, the difference were not significant under the rapid curing technique and were significant under the slow curing technique ( P < 0.01).

混合样品的石油醚提取含量高于C3F的，在快烤工艺下的差异不显著，在慢烤工艺下的差异显著（P<0.01）。

Taken into account to determine the quality of petroleum ether and cottonseed oil ratio of 1:1.

综合考虑，确定石油醚与棉籽油质量比为1：1。

After the tea oil extracted by the petroleum ether was further refined, the parameters of its physiochemical indexes had more advantages over those of cold-pressed tea oil. Meanwhile, these parameters were meet the national standards. 3.

比较发现经石油醚提取后得到的茶油，经进一步精制后其理化指标参数较冷榨茶油优，符合油茶籽油国家标准。

Effects of applying sesame seed cake fertilizer on nitrogen uptake in tobacco and its distribution in nicotine, protein and petroleum ether extract

配施芝麻饼肥对烟株氮素吸收及其在烟碱、蛋白质和醚提物中分配的影响

Portions of petroleum ether, n-butanol and water extracted from LEEs was much weaker on anticoagulant activity.

石油醚部位 、 正丁醇部位、水部位也有较弱抗凝活性.

Petroleum ether extract from rosemary leaves from three different provinces all have stronger antioxidant activity than BHT.

三地产迷迭香石油醚提取物的抗氧化活性均强于BHT。