浓度测定

At first, Oil phase conductivity change tendency is texted in this article, after mixed solution of Benzene,Tetrabutylammonium Bromid,cosurfatant which is added in KBr aqueous solution with different concentration, migration process of TBAB to the aqueous phase is studied.

本文首先通过电导率法测定了苯、四丁基溴化铵、助表面活性剂混合溶液中加入不同浓度的KBr水溶液震荡后油相电导率变化趋势，研究TBAB向水相迁移的过程。

METHODS Low-dose Peth 0.01, 0.1 and 1 mgkg^(-1) were given iv 10 min before guinea pigs inhaled 75% cigarette smoke 60 mL. Then, the changes in airway resistance R(subscript aw, dynamic lung compliance C(subscript dyn and vascular permeability in airway tissues were observed. The total leukocyte and the differential leukocyte in bronchoalveolar lavage fluid and nitric oxid e content in BALF were investigated after guinea pigs given iv Peth 0.1 mgkg^(-1) 10 min before cigarette smoke inhalation and consecutively inhaled 360 mL smoke in 2 h.

观察Peth 0.01，0.1和1mgkg^(-1)对豚鼠自主吸入75%香烟烟雾（含25% O2）60mL后，气道阻力和肺动态顺应性变化的影响及气道组织血管通透性变化的影响；观察Peth 0.1mgkg^(-1)对豚鼠2h内分6次吸入（共360mL）75%浓度的香烟烟雾后，支气管肺泡灌洗液中白细胞总数和分类计数改变的影响，测定BALF中一氧化氮含量。

The main results are as follows:(1)In order to find out the catalysis character of pectinase and xylanse in bacillus circularise A_6 and exhibit their maxium catalysis rate,the optimum condition for determination of pectinase and xylanase activity in bacillus circularise A_6 was studied in aspect of pH,temperature,substance concentration,reaction time,anion concentration.

试验结果如下：(1)为探明环状芽孢杆菌果胶酶及木聚糖酶的催化特性，更好发挥它们的催化性能，本文从pH值、温度、底物浓度、反应时间、离子强度几个方面研究了环状芽孢杆菌A_6产生的果胶酶与小聚糖酶活性测定的最适方法。

This paper set up a new method of SeC determination by differential pulse voltammetry at the / GC electrode.

依据SeC的还原峰电流与其浓度成线性递增关系，在充分探讨多种影响因素的基础上建立了／GC电极上微分脉沖伏安法测定SeC含量的新方法，其线性范围为5.0×10~(-8)～7.0×10~(-4) mol·L~(-1)，检出限为3×10~(-8) mol·L~(-1)。

The degassed liquid materials can be fed continuously. Therefore, half data of a phase diagram can be determined in a single round of experiment.

采用了液体物料集中脱气、液相转移物料、连续进料、以数字式精密压力计测量溶液总蒸汽压的实验方法，每次实验可完成二分之一全浓度范围的测定工作。

Water quality on-line monitoring equipment; water quality bio-chemical analysis apparatus; the experimental system for the dynamic simulation of water environments, and the on-line measurement of water body deoxygenating, re-aeration and the organic contaminant concentrations; the experimental system for the dynamical simulation of eutrophication of water environments.

实验中心主要仪器设备有：水质要素在线野外监测设备、水质要素生物化学分析仪器、水环境动态模拟与在线测定水体耗氧、复氧以及各种有机污染物浓度的试验系统，水环境富营养化动态模拟控制实验系统，可以对水质要素进行时间和空间上的监测与分析处理，为水污染治理提供科学的依据。

The concentration of As diffusing into other tissues was investigated.

用石墨炉原子吸收法测定了大鼠各组织中的砷浓度。

Objective To explore the association between the level of folate,VitB12 and acute cerebral infarction disease.Methods 88 acute ischemic cerebrovascular stroke disease events were disparted in two subgroups,32 of arteriosclerotic cerebral infarction,56 of lacunar cerebral infarction,and 35 contrast group were set up.All the participants' serum folate,VitB12 were measured when they entered the hospital.

目的 探讨急性脑梗死患者血清叶酸、VitB12水平及其临床意义方法对88例首次发病的急性缺血性脑中风患者分两亚组，动脉硬化性脑梗死组32例，腔隙性脑梗死组56例，并设对照组35例，入院后用罗氏公司Elecsys 2010型全自动电化学发光免疫分析仪测定血清叶酸、VitB12浓度。

In order to study the mechanism of electrodepositing Zn-Ni alloy coatings,the curve of cathodic polarization of electrodepositing Zn-Ni alloy coatings was determined by changing potential in the system of three electrodes,and the influence of concentration of additive on the cathodic polarization was studied.

为了研究Zn-Ni合金镀层的电沉积机理，采用三电极体系下的动电位法测定了电沉积Zn-Ni合金镀层的阴极极化曲线，并研究了添加剂浓度对阴极极化的影响。

In order to study the mechanism of electrodepositing Zn-Ni alloy coatings, the curve of cathodic polarization of electrodepositing Zn-Ni alloy coatings was determined by changing potential in the system of three electrodes, and the influence of concentration of additive on the cathodic polarization was studied.

为了研究Zn-Ni合全镀层的电沉积机理，采用三电极体系下的动电位法测定了电沉积Zn-Ni合金镀层的阴极极化曲线，并研究了添加剂浓度对阴极极化的影响。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！