浓度测定

Its performance was tested and compared with that of the pneumatic nebulization system.

分别用气动雾化进样系统和注射泵－超声雾化联用进样系统进样，测定了Cd，Cu，Mg，Ca和Na等5种元素、浓度均为1×10^(-4)%的混合溶液。

According to the evaporation equation, the evaporation degree of aerosol particles reaching ICP can be simulated, then we can get the value of useful mass transport rate, Wu, which is difficult to be gotten from experiment and can be used to assess the analytical performance and to optimize the operating parameters, such as solution and gas flow rate and the configurations of the nebulizer.

根据蒸发方程，可以模拟进入ICP的气溶胶粒子蒸发的程度，从而计算出实验上很难测定的有用质量传输速率Wu。本文通过Monte Carlo方法模拟了不同浓度的溶液、不同溶剂以及不同的载气流量、进样速度和雾化器的结构尺寸等变化对Wu的影响情况，并与实验结果进行比较，证明了模拟结果的可靠性，并依此选择最佳操作条件和雾化器的结构尺寸。

Virulence Difference of Biocontrol Bacteria J352 to Diffenent Nematodes WANG Yuan-yuan, DUAN Yu-xi, WANG Xu, CHEN Li-jie (Plant Nematology Laboratory, Shenyang Agricultural University, Shenyang 110161, China) Abstract: A bacterium J352 with antagonism to several pathogens was obtained from rhizosphere of cucumber. The effects to different nematodes were test by strain J352 fermentation broth with different concentration.

生防细菌J352对不同种类线虫的毒力差异王媛媛，段玉玺，王旭，陈立杰(沈阳农业大学植物保护学院线虫学研究室，沈阳 110161)摘要：从黄瓜根际分离获得一株对多种病原真菌有较强抑制作用的细菌，用该细菌不同浓度的发酵液测定了对4种线虫的作用。

Methods Ultrasensitive immunoassay (rate nephelometry with the Beckman Immunochemistry Systems) was used to measure...

用速率散射比浊法测定急性冠脉综合征患者和对照组血清CRP浓度，同时检测冠心病的常见危险因子并与CRP一起作Lo gistic回归分析。

This study explore the neurochemistry mechanism of hippocampal damage induced by psychological stress, and the relationship between hippocampal volume、NAA level and stress responses by Magnetic resonance imaging and spectroscopy in oder to provide experimental basis for the evaluation of mental injury in human.Materia...

本研究旨在强迫游泳应激动物模型的基础上，主要采用磁共振成像技术和磁共振频谱技术在体测定海马体积和NAA水平，探讨应激对海马损害的神经生化机制，应激的强度和海马体积、NAA浓度之间的关系，以期为人类精神刺激所致精神损伤的伤情评定提供实验依据。

The capability of scavenging sodium nitrite and disconnecting nitrosamine synthesis with hawthorn extracts by microwave method were determined by spectrophotometry under simulated human gastric juice,and was compared with vitamin C.

通过微波法提取山楂的活性成分，在模拟人体胃液条件下，采用分光光度法测定了不同浓度的山楂提取液对亚硝酸钠的清除能力和对亚硝胺合成的阻断能力，并与Vc进行了比较。

The concentrations of sevoflurane and nitrous oxide in the operating rooms were measured.

测定手术室的七氟醚和笑气的浓度。

Methods Tissue culture was used to study the cataractous lenses of rats induced by sodium selenite or galactose. At the early stage, the content of nonprotein sulfhydryl, protein sulfhydryl, non-soluble disulfide bond, malonaldehyde and the activities of glutathione peroxidase, glutathione reductase and glutathione-S-transferase were measured in the cataractous lenses, and they were compared with that of the normal lenses. Results The two kinds of material could all induce cataract in rats, sodium selenite being more potent.

采用器官培养方法，以不同浓度亚硒酸钠及半乳糖作用于晶状体，诱发大鼠晶状体形成白内障，在培养初期测定晶状体内非蛋白质巯基（nonprotein sulfhydryl， NP-SH、蛋白质巯基（protein sulfhydryl ，P-SH）和不溶性蛋白质二硫键的含量，脂类过氧化水平，以及与谷胱甘肽代谢有关的谷胱甘肽过氧化物酶(GSH peroxidase， GSH-PX)、谷胱甘肽还原酶(GSH reductase， GSSG-R)及谷胱甘肽硫转移酶(GSH S transferase， GSH-S)的活性。

The CPP was separated into five fractions using fractional precipitations by solvent/nonsolvent technique. Densities for binary mixtures of five fractionated and unfractionated CPP which contains a mass fraction of 30 % chlorine with solvents were determined. At a fixed temperature, concentration and solvent, the densities for binary mixtures of fractionated and unfractionated CPP with solvents have the same value.

用沉淀分级方法对氯含量为30％的氯化聚丙烯进行分级，得到5种窄分子量的级分，测定了氯化聚丙烯的不同级分与不同溶剂组成的二元混合物溶液的密度，在溶剂一定、浓度一定、温度一定时，不同级分氯化聚丙烯溶液的密度是相同的，不受分子量及其分布的影响。

This paper chose Carbendazim, Daconil, Imidacloprid and Methomyl as experiment objects, determined their influence to soil respiration of field, shed and school using obturate direct absorb method; discussed not only the variety of soil respiration under different pesticide's sorts, concentration and soil conditions but also the relationship between soil respiration and the variety of bacteria number in soil; confirmed the toxicity grade and dangerous index; provided an scientific basis for environment safety evaluation of pesticide's using.

因此，本论文选取多菌灵、百菌清、吡虫啉、万灵为受试农药，用密闭直接吸收法测定了农药对三种土壤（农田土、大棚土和校园土）呼吸作用的影响；讨论了农药种类、浓度、土壤条件的改变引起的土壤呼吸作用强度的变化及土壤呼吸量与土壤中细菌数量变化的关系；确定了农药的毒性等级和危害系数，为农药使用的环境安全性评价提供科学依据。

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！