光度测定

The results showed that Kaidimycin was chemically neutral, macrocylic polylactones, stable and liable to dissolve into water and pyridine, slight to dissolve into methanol, ethanol and N-butanol, difficult to dissolve into ethyl acetate, acetone, benzene and chloroform. Chemical reaction of functional group of Kaidimycin showed that it had glycoside, amino acid and aldehyde, no reducing sugar, polypeptide and phenol.

凯地菌素属中等极性的、中性抗生素，极性纸层析结果与多烯类抗生素的纸层析结果相似：易溶于水、吡啶，微溶于甲醇、乙醇、正丁醇，不溶于乙酸乙酯、丙酮、苯、三氯化碳；对高温、光照和紫外处理有很好的稳定性；官能团反应试验结果发现，凯地菌素可能含有糖苷键、氨基酸伯氨基和醛基，不含有还原糖、多肽和酚基，高锰酸钾、浓硫酸反应与多烯大环内酯类抗生素的特性相似；并且依据纯品，采用生物法和分光光度法对摇床发酵液进行了效价的测定。

Silicon in fuel oil reacts with aminosulfonic acid and form a violet component in the medium of tartaric acid and sulfuric acid.

以氨基磺酸为显色剂，用分光光度法测定燃料油中硅含量。

In the absence of coorperative effect, the reaction between lectin molecules and their receptors on cell surface can be described as below when equilibrium is reached:In which LT denotes total lectin concentration, LF free lectin concentration, mva-lency of lectin, ni number of receptors with affinity constant Ki to lectin, CT total lectin concentration.

本文提出一个描述细胞与多价凝集素反应的平衡关系式和用紫外分光光度法测定游离凝集素浓度求受体数量及其与凝集素的亲合常数的方便方法。

A novel determination method of trace chromium in waste water by dual-wavelength spectrophotometry was established based on the fact that chromium can react with alizarin blue S to form red complex in H2SO4 medium.

在H2SO4介质中，铬与茜素蓝S形成红色产物，据此建立了双波长分光光度法测定废水中痕量铬的新方法。

This paper determined the content of urinary MTs and cadmium in different crowd by RLS method using alizarin red and graphite furnace atomic absorption spetrophotometry respectively.

用本文建立的茜素红共振光散射法和石墨炉原子吸收分光光度法分别测定了不同环境人群尿中MTs和Cd的含量。

ABSTRACT The content of kanamycin sulfate was determined by charge tranfer reactions between kanamycin sulfate and alizarin red. The optimum condition and ratio of the complex component were decided.

研究了卡那霉素与茜素红的荷移反应，测定了荷移络合物在不同条件下的吸光度值，确定了最佳条件和络合物的组成。

Methods:Spectrophotometry was selected to determine the phosphorus level in soya lecithin,based on the formation of the blue complex by phosphate with ammonium molybdate and Fiske-Subbarow reagent in acid solution.

将样品中的有机磷酸化合物分解转化为无机磷酸盐，再利用在酸性溶液中磷酸盐与钼酸铵及Fiske-Subbarow试剂作用生成蓝色的化合物，在660nm处用分光光度法测定。

Potassium persulfate was used to digest the sewage sludge from municipal wastewater treatment plant in the high pressure sterilizer at 120 ℃, and the ammonium molybdate spectrophotometric method was used to determine total phosphorus content in the sewage sludge.

在高压灭菌器中于120℃下，用过硫酸钾溶液消解城市污水处理厂污泥，采用钼酸铵分光光度法测定污泥中总磷的含量。

Methods The pyrogllol auto-oxidation was adopted to produce superoxide anion O(superscript - subscript 2; the system H2O2/Fe(superscript 2+) was used to produce hydroxy radical through Fenton reaction; and spectrophotometry was used to detect the clearing functions of drugs with different concentrations against O(superscript - subscript 2) and OH.

采用邻苯三酚自氧化法产生超氧阴离子自由基O(上标-下标 2，采用H2O2/Fe(上标 2+)体系通过Fenton反应产生羟自由基，用分光光度法分别测定不同浓度的药物对O(上标-下标 2)是和OH的清除作用。

In this paper,the method for measuring water soluble Sulphate in soil by Barium Chromate Spectrophotometry is discussed as well as the experiment conditions about the rate of water soil and vibration time.

介绍铬酸钡分光光度法测定土壤中水溶性硫酸盐的分析方法，并讨论了水土比、振荡时间等实验条件。

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。