查询词典 quantitative determination

Combining the two-dimensional information which consisted of the absorption spectra and the distribution curve of species along with the pH values, a quantitative analytical method for the determination of the pigments in a gray system was proposed.

利用合成色素随pH变化的分布分数曲线和吸收光谱构成两维波谱信息，建立了灰色体系中色素的定量分析方法。

It showed that this weak cation packing can be used for quantitative cation determination.

这一结果表明，此填料可用于阳离子定量分析。

The method was applied to quantitative separation and determination of trace chromium in water.

方法可用于环境水样和废水中微量铬的测定。

But so far there is no set of complete norms and standards to be followed, especially in the quantitative calculating and estimating of colorimetry on image, and in the determination of optimal composition.

其中，对图像色度的定量计算和定量预测以及与此有关的最佳合成方案的确定，目前还没有一个完整的标准和规范可供遵循。

A quantitative method tor determination ot the activity oft nopaline synthase in the crude enzyme extract of crown gall by measurement of the expense of NADPH was established.

本文发展了一种根据NADPH消耗定量测定冠瘿组织粗酶提取液中nopaline合酶活性的方法。

The quantitative analysis of hydroxyl radical can be done through the determination of the peak current and the fluorescence intensity.

通过测定峰电流和荧光强度的变化可以间接测定羟基自由基以及抗氧化剂对羟基自由基的清除能力。

Chinese chestnuts of Qianxi were dealed with by wet method and the determination of the content of Se in chestnuts was discussed on the influence of the proportion of nitric acid and the perchloric acid. In the system of ferricyanide potassium and hydrochloric acid, the determination conditions were optimized by standard-curve method and quantitative analysis was acquired.

采用湿法处理河北迁西板栗样品，探讨了硝酸与高氯酸的配比对板栗中硒元素含量测定的影响，在铁氰化钾－盐酸体系中，对测定条件进行了优化，采用标准曲线法定量分析。

This introduces several basic manipulative techniques of preparative chemistry and quantitative volumetric analysis including preparation and characterization of a derivative, recrystallization, determination of equivalent weight by using titration and determination of melting points.

这里介绍了几个基本的合成技术和定量分析法，包括衍生物的合成及其结构表徵，再结晶，用滴定法确定等当量和熔点测定。

The determination of cytokinin levels is a primary and basic approach in the cytokinin studies. The Amaranthus betacyanin bioassay was modified for the rapid and convenient determination of cytokinin activity. Meanwhile, the procedures for quantitative analyses of cytokinins by HPLC and ELISA were estabolished, and these gurantee the analyses of cytokinin levels with high precision.

在细胞分裂素的活性测定中，通过改进尾穗苋苋红素合成法建立了一种简便、准确的生物试法，同时还建立了根据物理化学和免疫学原理而测定细胞分裂素的HPLC和ELISA方法，使得细胞分裂素的定量更加准确。

The most important character of these lithofacies palaeogeography maps is quantification. Quantification means that the determination of each palaeogeography unit is based on the accurate quantitative data and the quantitative single factor maps.

这些岩相古地理图最主要的特征是定量，即每个古地理单位的划分和确定都有确切的定量资料与定量的单因素图。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。