查询词典 purification

This paper is studying on the isolation technique、purification、identification the molecule structure of the new agricultural antibiotics 2507 which can controlling oomycetes developed by Plant Protection Institute of Guangdong Academy of Agriculture Sciences.

本研究主要是围绕广东农科院植保所自行开发出的防治植物卵菌病害的新农用抗生素2507的提取工艺、分离纯化、结构鉴定的下游过程进行的，取得的主要成果是

Purified GO had a molecular weight between 145, 000 and 162, 300, as determined by Sephadex G-200 filtration and SDS-PAGE of the enzyme as cross-linked with glutaraldehyde. This result showed that the holoenzyme was a tetramer, and no change occurred in molecular weight of the enzyme during the s〓orage. The active form of GO from brassica leaves showed a constant molecular weight during purification, so did that from O. sativa leaves during greening of etiolated seedlings, maybe acting as a stable tetramer.

用Sephadex G-200胶过滤和戊二醛交联后的SDS-PAGE法测得纯化的菜心叶片GO的分子量在145，000-162，300间，为四聚体；并且在放置过程中其分子量和聚合态均保持不变，为稳定的四聚体；进一步研究表明菜心叶片GO在纯化过程中和水稻叶片GO在黄化苗的转绿过程中，两种GO活性状态的分子量和聚合态也没有发生变化，均呈四聚体。

Objective To study construction of vector to overexpress staphylokinase, expression in vitro and purification of the product.

目的研究高效表达葡激酶载体的构建及其体外表达与产物的纯化。

The purification procedure described in this paper is quite simple. Addition of CaCl〓 helps to maintain oxygen activity and aggregate the membranes so that they can be conveniently pelleted in a short time by normal centrifugation instead of ultracentrifugation.

在提取液中加入一定浓度的Ca〓（Ca〓既有助于维持类囊体膜的放氧活性又可以使类囊体膜在较低的离心速度下使类囊体膜得到凝集沉淀），从而在较短时间内、在高速离心的情况下得到了纯度较高并具有较高放氧活性的发菜类囊体膜。

Air purification used in the context of the photocatalytic TiO2 is.

在空气净化方面常用的光触媒是 TiO2。

An improved purification procedure for satsuma dwarf viruswithout sucrose density-gradient centrifugation was developed,by whichglobular SDV particles about 25 nm in diameted were observed with elec-tron microscopy,using only 100-200 g of Physalis floridana-infectedleaves as the virus source.

本文提出的温州蜜柑萎缩病毒提纯法，仅用100～200克病洋酸浆叶，且无需通过蔗糖密度梯度离心，在电镜下亦能看到中量直径约25nm 的球状病毒颗粒，粗提纯制剂OD_(860)/OD_(280)平均值为1.28，OD_(260)/OD_(240)平均值为1.15，初步显示出SDV 特征性紫外吸收曲线，提纯病毒产量约为4.5～11mg/kg病叶。

Results and Conclusions The studies on securinine of phytochemical properties, isolation and purification, bioactivities, and others have been reviewed, and correlative work on quality control of securinine need to be improved.

结果与结论综述了一叶萩碱的物化性质、提取分离和生物活性等研究现状，相关质量分析工作尚需完善。

Keywords phytolacca americana red pigment isolartion and purification ion exchange rein

商陆红色素；分离纯化；离子交换树脂

The process parameters of the separation and purification of shikimic acid from Picea meyeri with ion exchange resin were established.

建立了离子交换树脂分离纯化白扦中莽草酸的工艺条件和参数。

Five bacteria strains were isolated from the intestine of Pieris larvae by traditional methods of separation, purification and cultivation.

从自然种群的菜青虫肠道环境中按传统分离、纯化、培养，获得细菌5个菌株，对其菌体形态、染色反应、培养性状、生理生化反应进行了系统研究。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。