测定

Introduce the composition of naphthenic acid and two methods about the determination of acid number .

介绍了石油酸的组成及国内测定原油酸值的两种方法，对采用不同方法测定原油酸值产生的差异进行分析，建议采用电位滴定法测定原油的酸值。

The principle and method for determining the total acid number of oil product by voltammetric techniques was described,the results of voltammetric techniques and standard method analysis were compared.

介绍了用伏安法测定石油产品总酸值的原理、方法，并将伏安法测定润滑油酸值的结果与标准方法测定结果进行了比较。

I applied the dynamic-chamber IRGA method (Li-6400) and Alkali Absorption to measure the soil respiration and compared to understand their relationship.

采用Li-cor8100测定土壤呼吸日变化，采用静态气室—碱液吸收法和动态气室—远红外分析仪法(Li-cor6400)测定该地区土壤呼吸的月变化和年度变化，并研究了两种测定方法的相关性。

At first, we studied the assay of cellulase activities because there is not a standard.

首先，针对目前纤维素酶活力的测定没有统一的标准，测定结果无法比较的现状，论文的第一部分对纤维素酶活力的测定进行了研究。

In this paper, the phosphorus contents in calcium hydrogen phosphate are determined by a ICP-AES method.

研究了电感耦合等离子体发射光谱测定磷酸氢钙中磷含量的分析方法，测量的精密度。5 %，与按国家标准方法测定结果对照表明，用该方法测定的结果准确、可

The main factors affecting the accuracy of Permanganate index determination are water bath calefaction time, titration time and blank value.

影响高锰酸盐指数测定准确性的主要因素是水浴加热时间、滴定时间和空白值，本文通过实验考察这三个因素对高锰酸盐指数测定的影响程度，对高锰酸盐指数的准确测定具有指导意义。

Applications of gas chromatography in the research of biodiesel processing are reviewed with 27 references,including the analysis of fatty acid methyl esters in the reaction products and final biodiesel,the determination of mono-, di-and tri- glycerides ,the contents and distribution of free fatty acids,and the determination of trace methanol in biodiesel.

综述了气相色谱法在生物柴油生产工艺研究中的应用，包括反应产物和生物柴油产品中脂肪酸甲酯含量和分布的测定，单脂肪酸甘油酯、二脂肪酸甘油酯和三脂肪酸甘油酯含量的测定，游离脂肪酸含量的测定以及微量甲醇含量的测定等。

In Hubei. After screening, two strains of fungal parasites were gottenwhich had stronger. ability to parasite Meloidogyne eggs. Their parasitic ratio tothe root knot eggs was 78.04% and 70.02% in concave slides and water agar plates,72.37% and 65.65% in pots. The effective hatchings in experimental containers wereonly 5.02% and 8.32%, and there were 100% in controls.

危害的根和根围土壤64份样品，采用3种方法分离，经过筛选测定，获寄生能力较强的真菌2株，室内凹玻片和琼脂平板法测定结果表明，对卵的校正寄生率分别为78.04%和70.02%；室外盆栽测定的寄生率分别为72.37%和65.65%，供试卵有效孵化率为5.02%和8.32%，对照卵为100%。4%土重的棉籽壳真菌制剂能有效控制根结线虫第一代卵量，有效用量的10倍菌剂盆栽测定对植物均没有不良影响。

To validate the above conclusion, a series of mixture tests were performed and different samples were made by mixing each of three kinds of nature silt and the nature clay with different mixture ratio. The liquid-plastic limits of all the samples, in which the clay particles content were between the nature silt and the nature clay, were attained using the combined test method. The results showed that the lowest clay particles content of the silt, when it was suitable with the combined test method, is 12% to 15% with little differences. If the point of 3～4mm depth of penetration of fall cone exist, and the loglog relationship between the depth of penetration of fall cone and the water content of all the points were clearly linear, it could be concluded that the clay particles content of the sample is over the lowest value when the combined test was suitable.

3其后为了进一步验证所得结论，针对三种粉土，分别与一种黏粒含量较大的天然黏土进行多种组合的配比试验，配比后的土样其黏粒含量均介于原粉土与原黏土之间，并对各种配比后土样进行联合测定法确定液、塑限的试验研究，得出各种土对联合测定法适用的最低黏粒含量限值因粒径组成不同、矿物组成不同等因素，存在微小差异，在12%到15%之间；当圆锥下沉深度在3～4mm之间的试验点存在，且与其他试验点之间能形成良好的双对数直线关系，即认为土中黏粒含量超过该土对联合测定法适用的最低限值，联合测定法适用。

Several methods were selected to determine the content of flavonoids in corn silk, while satisfying wave length wasdecided by means of UV-visible photometer curves of flavonoids and its monomer in corn silk, as well as rutin at the range of200~600nm after reacting with different regents , and comparison of experimental results were carried out.

本文选用多种黄酮类测定方法，通过对玉米须黄酮类提取液、单体及芦丁标样用不同的显色剂反应后，测定各反应液在200~600nm范围内的吸收曲线，确定了适合玉米须黄酮类定量测定的波长，并对不同测定方法的定量结果进行了比较。

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。