萃取的

Classical solvent extraction is one important technology for the selective removal and enrichment of metal ions from aqueous solutions. However, it is not suitable for the separation of biological molecules such as protein and enzyme, because organic solvent can denature them.

溶剂萃取法是分析分离中最重要的方法之一，常用于金属的分离和富集，但对于生物大分子，加入有机溶剂会使其失活，因此经典溶剂萃取分离不适用，需研究新的体系。

The purposes of this study were to develop a sequential chemical extractions scheme suitable to fractionate the forms of heavy metals associated with phosphate in neutral and alkali soils contaminated with heavy metals.

许多学者提出重金属连续萃取法(sequential chemical extractions， SCE)研究重金属存在型态大多忽略和磷酸盐之相关性，本研究拟提出适当的连续萃取步骤，探讨中性及碱性污染土壤中重金属与磷存在型态的分布及其相关性，并探讨用盐酸清洗此等土壤时，其可能移除重金属之型态及部份植物养分成份被移除的程度。

The paper,according to the analyzing of lead dross reverberator dust,put forward the new technics indium distilling by sulfuric acid leach ing,P204 extraction,sulfuric acid washing,hydrochloric acid reverse extraction,zinc replacement,smelting,electrolysis,casting etc.

研究分析了铅浮渣反射炉烟尘的性质和特点，提出了二段硫酸浸出、P204萃取、硫酸洗涤、盐酸反萃、锌板置换、压团熔铸、电解铸型的提铟新工艺，并进行了全流程的试验研究，明确了各工序的工艺技术条件。

Supersonic energy was utilized to study the modified Tessier sequential extraction proce-dure for speciation analysis of heavy metals in soils.

利用超声波的能量研究了经改进的Tessier 系列萃取法，并用此法萃取分析了土壤中重金属的形态。

The effect of γ-radiation on extraction and stripping or retention of technetium by 30 % trialkyllphosphine oxide in kerosene is investigated.

研究了γ辐照对 30 %TRPO 煤油对Tc萃取性能的影响以及从辐照后的负载有机相中分别用 5 5mol/LHNO3和 5%Na2 CO3 去离子水反萃Tc的性能变化及Tc保留情况。

ResultsContent of ethanol, extracts of organic solution, washoff solution and different kind of resin had effect on the extraction of total flavone from bamboo leaves.

结果乙醇浸取浓度、萃取有机溶剂、大孔树脂以及乙醇洗脱浓度对竹叶总黄酮的分离纯化有一定影响。

We choose the solid phase extration to deal with the biolog...

本文采用固相萃取法对叶酸血浆样品进行前处理，首次应用大孔吸附树脂作为萃取固定相，同时，还研究了叶酸的光化学行为，发现叶酸本身有弱荧光，在一定的反应介质中，经光化学诱导，可产生较强的荧光产物，从而明显改善检测灵敏度。

Through the processes of grinding bastnaesite ore concentrate, mixing the ore powder with NaCO3 in the ratio of 1 to 0.1-0.4, roasting the mixture at 400-800 deg.c for 1-6 hr, elution of the roasted sand with hot water to obtain NaF, drying filtered drag after eluting NaF and mixing the dried drag with ammonium chloride, roasting the mixture at 300-600 deg.c for 1-3 hr, hot water soaking to obtain rare earth chloride solution, extraction with 20% kerosine solution of naphthenic acid, and hydrochloric acid counter extraction to obtain rare earth chloride product.

本发明涉及一种氯化铵法从氟碳铈精矿提取氯化稀土的方法，首先将氟碳铈原精矿磨细，并与NaCO 3 混合，其比例为原矿∶NaCO 3 ＝1∶0.1～0.4，混合均匀后在400℃～800℃焙烧1～6小时，焙砂用热水洗出NaF，洗出NaF的滤渣干燥后与氯化铵混合，于300℃～600℃焙烧1～3小时，再用热水浸取得到氯化稀土溶液，用20％的环烷酸煤油液萃取，再采用盐酸反萃得到氯化稀土产品。

In this study, the dry pericarps were extracted by solvents and estimated the biological activities such as antimicrobial activities, antioxidant abilities, anti-inflammatory properties. In addition, the extracts were also applied on hair for the evaluation of detergency, combing, stretching, surface tension and wetting.

本研究取乾燥无患子果皮经溶剂萃取后进行生物活性测试包括抗菌、抗氧化、抗发炎并将其应用於洗剂以头发评估清洁力、梳理性、拉力、表面张力及湿润性，增加无患子在化菻~中天然成分的作用价值。

One of the most powerful cancer drugs on the market — Taxol or, generically, paclitaxel — comes from the Pacific yew tree. It was discovered in the 1960s during a massive government program to find medications in plant extracts.

作为目前市面上最有效的抗癌药物之一，紫杉醇取自太平洋紫杉。20世纪60年代，研究人员在一个政府项目中发现了紫杉醇，这个项目旨在在植物萃取物中发现有用药物。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。