The test is a research on the extraction of distilling essential oil from leaves by comparing efficiency of extraction by three reagents. Those are ether, ethyl acetate and ether from Petroleum.
本试验对树叶中提取精油萃取液进行了研究，通过三种不同试剂萃取，对水蒸汽蒸馏产物所得的萃取率来研究其适合度。
Overview: The Division clouds extract of tobacco from Yunnan mainly as raw materials extracted by petroleum ether extract obtained in Yunnan tobacco.
概述：本司云烟浸膏主要采用云南产的烟叶为原材料，通过石油醚浸提云南地区烟叶制得浸膏。
This paper studied on oat oil from deshelled oat seeds by petroleum ether extraction.
本课题以脱壳燕麦为原料，经石油醚提取得到燕麦油。
Methods the extracted liquid with petroleum ether from the geochemical samples in the north of Shaanxi was spectrally analyzed by using the optimized measurement condition.
方法用优化后的条件对陕北地区化探样品中芳烃的石油醚萃取液进行了光谱分析。
Method the extracts of petroleum ether, ether, ethyl acetate, ethanol and hot water from the whole plant were used to determine the in vitro miti-oxidant and antibacterial activity.
方法对楮头红的石油醚、乙醚、乙酸乙酯、乙醇和热水的粗提取物分别进行体外抗氧化和抑菌试验。
The ethanol extract from the twig bark powder of Periploca sepium was suspended in water and successively treated with petroleum ether, ethyl acetate and n-butanol.
将杠柳枝皮粉末的乙醇提取物悬浮于水后，依次用石油醚、乙酸乙酯和正丁醇萃取。
Extraction of Gallium from high concentration HCl solution using organic phases which composes of TBP and butyl acetic ester, xylene, petroleum ether and kerosene, respectively, are investigated.
系统研究了以TBP为萃取剂，乙酸丁酯、二甲苯、石油醚、 煤油为稀释剂，从高酸度盐酸溶液中萃取镓。
To obtain chemical constituents from the fruit of Catalpa ovata G. Don, the methods of water extraction, ethanol extraction and petroleum ether extraction were used.
采用水提取法、醇提取法和石油醚提取法对梓树果实的化学成分进行了比较全面的定性实验。
MethodsTo obtain chemical constituents from Musa basioo, in this paper the methods of water extraction, ethanol extraction and petroleum ether extraction were used.
方法采用水提取法、醇提取法和石油醚提取法对芭蕉根的化学成分进行定性实验。
Compared with petroleum ether extraction method, the extraction rate from SFE -co2 is higher and extraction time shorter.
并与传统的石油醚萃取法相比较，其萃取时间短，得油率高。
The yield of petroleum ether extractives from the crowns of C. lanceolata was 5 4% of its dry weight.
杉木绿冠的石油醚提取物得率，为其绝干重量的5．4％。
Through single factor and orthogonal experiments, extraction of oil from soybean embryo and its composition were studied by using petroleum ether as degrease solvent and GC, respectively.
以大豆胚芽出油率为指标，石油醚为脱脂溶剂，通过单因素和正交试验对大豆胚芽索氏提取工艺进行了研究，并用气相色谱对胚芽油的脂肪酸组成进行了分析。
In four extracts from PMEW treated with methyl alcohol and water, petroleum ether, chloroform and ethyl acetate, extract rate of methyl alcohol and water was the highest.
通过对PMEW萃取分离发现，在甲醇水、氯仿、石油醚和乙酸乙酯四种萃取物中仍以甲醇水的萃取率最高。
From the 35% EtoAc-petroleum ether portion 1-0-hexanoyl-glycerol ester(12) were isolated.
从35％乙酸乙酯—石油醚部分分离得到了十六碳酸甘油酯（12）。
Another part is about the separating from the Petroleum ether fraction of Selaginella uncinata (Desv. ) Spring.
另一部分是对瑶药翠云草石油醚萃取部位化学成分进行分离。
The invention discloses a yellow-tea alcohol extract extracted from petroleum ether as well as a preparation method and applications thereof.
本发明公开了一种石油醚提取黄茶浸膏及其制备方法和应用。
The invention discloses a white-tea alcohol extract extracted from petroleum ether as well as a preparation method and applications thereof.
本发明公开了一种石油醚提取白茶浸膏及其制备方法和应用。
The invention discloses a white-tea alcohol extract extracted from petroleum ether as well as a preparation method and applications thereof.
本发明公开了一种石油醚提取白茶浸膏及其制备方法和应用。
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