定量测定

Using the Shannon-Wiener's niche breadth index and the Pianka's niche overlaps index, we found that the Nereis japonica, nemerteans and eelworms had broad niche breadths (above 2.80); the niche overlaps among them was high (above 0.90) in the quantitative analysis on the 21 species present in the quantitative sample analysis.

对定量取样中获得的21个物种以Shannon-Wiener指数为基础进行了生态位宽度测定，以Pianka重叠指数为基础进行了生态位重叠值分析，结果表明日本沙蚕、纽虫和线虫的生态位较宽，均为2.80以上，它们之间的生态重叠值也较高，均为0.90以上。

Methods Eighty-eight paired samples including near-cancer colorectal normal mucosa and matched cancerous tissue were included. Caspase-9 mRNA was detected by real-time PCR.

采用实时荧光定量PCR技术测定88例配对的结直肠癌组织及癌旁正常组织中Capase-9 mRNA的表达，并分析表达的变化与临床病理特征的关系。

MethodsTo extract the alkaloids of Radix Tinospora with different solvents,reckon the ratio,determine Jatrorrhizine Hydrochloride and Palmation Hydrochloride by HPLC,taking this as the indexes,to ascertain the optimum extraction technology.

方法用不同极性的溶剂对金果榄进行提取，计算出膏率，采用高效液相色谱法测定金果榄中生物碱的含量，以此做为定量指标，确定最佳提取工艺。

The partial least square regression is used to build calibration models.

通过正确的光谱预处理方法、光谱区域的选择和偏最小二乘回归确定定量校正模型，建立了近红外光谱快速测定柴油性质的方法。

After alkaline hydrolysis, the hair sample (10 mg) was extracted with pentane, and analyzed by liquid chromatography-tandem mass spectrometry with electrospray ionization and multiple reaction monitoring.

将10 mg样品碱水解后加入戊烷提取，然后进行LC-MS/MS分析，采用正离子电喷雾电离、多反应监测模式测定，方法的最低定量限为25 pg/mg。

The bactericidal performance of Tetrakis Hydroxymethyl Phosphonium Sulfate, 2-Bromo-2-nitro-1.3-Propanediol and formalin was studied in a carrier quantitative germicidal test.

通过载体定量试验对四羟甲基硫酸磷、溴硝醇和甲醛溶液的杀菌效果进行测定。

And thio-acetylamide reagent was used as precipitating agent and some other chemicals were also used in the method etc.

本方法操作具体，比色明显、定量明确，对试样的测定得到了满意的结果。

Their electrochemical behaviors for single solute and mixed systems of hydroquinone(H2Q) and pyrocatechol are investigated.A pair of redox peak of H2Q and two pairs of redox peaks of PC on the composite film electrodes can be obviously distinguished in their mixed systems,which show the composite film electrodes have excellent electrocatalytic activity for two ...

结果表明聚苯胺复合膜电极具有很好的电催化作用，在混合体系中对苯二酚的一对氧化还原峰和邻苯二酚的两对氧化还原峰能够清楚地区分；并且在一定的浓度范围内单组分的浓度与峰电流呈良好的线性关系，说明该电极对苯二酚的测定在定性、定量中具有潜在的应用价值。

"Grain Quantitative Quantizer" is precise device to measure the percentage of the various conponents under the microscope.

本文介绍的"数字式颗粒定量仪"是用于显微镜下对各种成分含量百分比测定的精密仪器。

Methods:The expression of CK20mRNA in portal venous blood from 30 colorectal cancer patients was detected by fluorescent quarto RTPCR,and the results of CD44v6 and PCNA in colorectal cancer tissue were determined by means of immunohistochemistry,and then compared with control groups through statistics analysis.

应用荧光定量RTPCR法检测50例大肠癌患者回流门静脉血中CK20mRNA，同时应用免疫组织化学方法测定大肠癌癌组织中CD44v6、PCNA的表达，并与对照组比较。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。