萃取的

The extraction effects of Zn and Cd from chloride medium with primary amine N1923 and 2-ethylhexylphosphonic acid mono-2-ethylhexyl ester are studied.

考察了伯胺N1923与中性有机磷类萃取剂DEH／EHP的混合体系在盐酸介质中对Zn和Cd的萃取效应，研究了萃取机理，并研究了此混合体系对Zn和Cd的分离。

In the end, the extractive distillation method was applied to separate and purify the binary azeotrope mixture, methanol-dimethyl carbonate. The isoamyl acetate was used as extractant and the two tower system was introduced to continuous extractive distillation operation. The results show a better separation effect.

最后采用萃取精馏的方法，对甲醇-碳酸二甲酯的二元共沸混合物进行了分离提纯研究，以毒性较低的乙酸异戊酯为萃取剂，采用两塔连续萃取精馏操作，结果表明，分离效果比较理想。

Based on the retrieval and analysis of the Bibliographer, the methods of water-disitillation extraction, sametime-disitillation extraction and supercritical CO_2 extraction for the extraction of three typical kinds of natural substances in Zhejiang Province were evaluated exp...

论文在文献阅译和工艺原理分析的基础上，以浙江比较有特色的三种天然物质为研究对象，实验评估了水蒸气蒸馏、同时蒸馏萃取和CO_2超临界萃取等方法，研究了金柑挥发油、白玉兰花挥发油和香菇精等三种天然香精的不同提取工艺，重点研究了CO_2超临界萃取工艺与成份分析方法。

Based on the retrieval and analysis of the Bibliographer, the methods of water-disitillation extraction, sametime-disitillation extraction and supercritical CO_2 extraction for the extraction of three typical kinds of natural substances in Zhejiang Province were evaluated experimentally.

论文在文献阅译和工艺原理分析的基础上，以浙江比较有特色的三种天然物质为研究对象，实验评估了水蒸气蒸馏、同时蒸馏萃取和CO_2超临界萃取等方法，研究了金柑挥发油、白玉兰花挥发油和香菇精等三种天然香精的不同提取工艺，重点研究了CO_2超临界萃取工艺与成份分析方法。

The relative contents of thujopsene and cedrol were higher in P.orientalis extracted by SFE and MSD methods.No monoterpenes was found in the compounds extracted by SFE and SDE,and the wood resin acids were the major compounds in the compounds extracted by SE.

改装简易蒸馏样品和超临界CO_2萃取物以及并时蒸馏萃取物中含量最高的组分是罗汉柏烯和柏木脑，但是超临界CO_2萃取物中未检测出单萜；索氏提取法样品中含量最高的组分为非挥发性的树脂酸类物质。

The R^2 values of TEAC and FRAP also showed a higher correlation (water extracts, R^2=0.984; ethanol extracts, R^2=0.971). In HPLC analysis, the chromatograms of the water and ethanol extracts of HN with the highest antioxidant activity were established.

在HPLC的分析中，由於乞食碗具有最高的抗氧化活性，其水萃取物及乙醇萃取物已建立指纹图谱，卢丁发现可能是乞食碗萃取物中的一个重要活性成分。

It indicates that TBOPDA has better hydrolysis stability. At 50 ℃,when the acidity is 1 mol/L HNO_3, the effects of hydrolysis on distribution ratio are unchanged, when the acidity is 5 mol/L, the changes of distribution ratio are about 37%.

研究结果表明，该萃取剂在水溶液中具有较高的稳定性，当酸度为1mol/L，温度达到50℃时，铀的萃取性能没有变化；当酸度提高到5mol/L时，50℃条件下，铀的萃取分配比下降约37%。

Compared with the National Standard Method of People's Republic of China, the subcritical water extraction method need less reagents and achieves higher extraction efficiency.

研究了肉制品中亚硝酸盐的亚临界水萃取预处理技术，分别考察了温度、时间、萃取剂组成对萃取效率的影响。

This study describes the extraction of nitrite from meat by subcritical water.

研究了肉制品中亚硝酸盐的亚临界水萃取预处理技术，分别考察了温度、时间、萃取剂组成对萃取效率的影响。

The extraction condition of the brown coal in different solvent is introduced,for its extraction principle and the influencing factor of extraction rate make comprehensive statement.

本文介绍了褐煤在不同溶剂中的萃取情况，对其萃取原理和萃取率的影响因素做了综合叙述。

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％。