查询词典 purification

Some problems relating to chemical characters of transuranium elements, pretreatment of samples,methods of separation and purification,selection of chemical yield tracer,and various measurement technique are discussed.

有关超铀元素的化学特性、样品的前处理、分离和提纯方法、化学产额示踪剂的选择以及各种测量技术等一些问题也进行了讨论。

Separation , Purification and Structural Identification of Anti tumour Compound in Trapa manshurica Fler

菱角中抗肿瘤活性成分的分离，提纯及结构鉴定

Some water samples from intakes and outlets of 3 wetland pond beds growing Phragmites communis Trin, Typha angustifolia and Cyperus alternifolius were respectively taken for monitoring and contrasting 5 main water quality indexes including dissolved oxygen, chemical oxygen demand, biochemical oxygen demand in 5 days (BOD5), total nitrogen, and total phosphorus month by month all year around, so as to discover influences of different plant species on water purification efficiency.

摘 要：通过对成都活水公园人工湿地中的3种优势挺水植物所在塘床进出水口的5个主要水质指标：水中溶解氧（dissolved oxygen， DO）、化学需氧量（chemical oxygen demand， CODcr）、5日生化耗氧量（biochemical oxygen demand in 5 days， BOD5）、总氮（total nitrogen， TN）、总磷（total phosphorus， TP）的全年逐月对比监测，探索不同植物种类对污水净化效率的影响，并对湿地中不同植物塘净化效率产生差异的原因作了较全面的分析讨论。

In this thesis, the tripeptide GHK has been synthesized by liquid-phase method and octpeptide Eptifibatide by solid-phase method. Coupling agents and purification problem have been studied in the process of peptide synthesis.

本论文分别采用液相法和固相法合成了具有药用价值的三肽GHK及八肽Eptifibatide，研究了多肽合成过程中缩合剂及纯化等问题。

Here we report the cloning, expression, purification and activity assay of Phenylalanyl-tRNA synthetase from Trypanosoma brucei in Escherichia coli host.

本研究用大肠杆菌成功克隆表达并纯化了布氏锥虫苯丙氨酰-tRNA合成酶并进行了活性测定。

According to the pilot researches,the effects of Typha wetland and hydraulic retention time in the purification efficiency for highly salty reused water treatment in TEDA Landscape River were studied in this paper,while different kinds of contamination is evaluated.

通过香蒲湿地对天津泰达景观河道水体污染物去除的室内试验，研究了香蒲湿地对泰达高含盐再生水的净化效果以及水力停留时间对水质净化效果的影响，考察了不同污染物的去除情况。

When pH is litmusless, the purification efficiency is the largest. The unhomogeneity of liquid flow results in the uneven biofilm growth. The flow resistance after start-up is significantly larger than that before start-up, whichprovides a method to monitor the biofilm growth.3、The packed bed is simplified to a series of straight capillary tubes covered by the biofilm. The two-phase flow and mass transport, biochemical reaction kinetics, and the limitation of oxygen are taken account of in this model. The results of model are basically in agreement with the experimental data.

通过观察还发现，由于液体分布不均，生物膜在滴滤塔内生长分布不均，并且挂膜后，滴滤塔的孔隙率减小，两相流动阻力比空塔时的大，可采用流动阻力的变化作为判断挂膜成功与否判据。3、首次将多孔填料塔简化成多个竖直毛细管并行排列构成的填料，应用两相流理论，结合生化反应动力学，并考虑氧的限制，建立了一个生物膜滴滤塔降解废气的毛细管模型，其结果与实验数据吻合得较好。

It has also been discovered that, before complete purification, the synthetic HWTX-Ⅰ, after oxidative treatment, showed wider and more asymmetric peaks than the native HWTX-Ⅰ that was denatured and then renatured under the same experimental conditions, which suggests that there is even greater conformational unhomogeneity in the synthetic HWTX-Ⅰ.

推测除了在合成HWTX-Ⅰ复性过程中有少数分子发生二硫键错配外，还有部分分子在固相合成中发生了消旋作用，需要交替采取多种色谱法才能完全分离纯化复性后的合成多肽产物。

Objective To compare the efficacy of different modes of blood purification on patients with uremic encephalopathy.

目的 比较不同血液净化方式治疗尿毒症脑病的疗效。

Then Vero cells were inoculated with a final cell density of 1×105/mL . After 7 days of culture, cell density can reach 6~7×106/mL, then rabies virus VaG strain was inoculated with a MOI of 0.01. After 24h inoculation, the cultured viruses were harvested continuously for 12 days. The titer of collected virus in the culture medium was about 6.0 to 8.5 logLD50/mL. From these collected viruses, vaccines were prepared through the steps of concentration, inactivation and purification, The quality of these vaccines meets "The Chinese Requirements for Biologics Year 2000".

在5L体积的生物反应器中，加入含10g/L微载体的199培养基，接种Vero细胞至细胞浓度达到1×105/mL，培养7d后细胞可生长至6~7×106/mL，然后以感染复数为0.01接种狂犬病毒VaG株，接毒后24h开始收获，连续收获12d左右，收获的病毒滴度范围在6.0~8.5logLD50/mL，收获的病毒原液经浓缩、灭活和纯化等步骤制备成疫苗，各项质量指标均达到《中国生物制品规程》2000年版要求。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。