光度

A catalytic kinetic spectrophotometric method for the determination Ni has been developed based on the enhancement of the catalytic effect of Ni on the oxidation fading reaction of isatin and sodium persulfate.

基于聚乙二醇对Ni(上标 2+)催化过硫酸钠(Na2S2O8)氧化靛红褪色反应的增敏效果，建立了一种新的测定Ni(上标 2+)的增敏动力学光度法。

In this paper, the direct spectroscopic kappa number testing method developed previously is simplified and improved.

摘 要：对卡伯值分光光度直接测定法进行了改进和简化。

The new technique reduced the distance ladder to three "rungs":(1) The distance to galaxy NGC4258 is measured using straightforward geometry and Kepler's laws;(2)Cepheids in six more distant galaxies are used to calibrate the luminosity of Type Ia supernovae;(3) The Hubble constant is measured by observing a brighter milepost marker, Type Ia supernovae, in more distant galaxies hundreds of millions of light-years away, embedded in the expanding universe.

这种新技巧简化了距离跳跃为三个"阶梯"：1、星系NGC 4258的距离采用开普勒定律和简单直接的几何方法精确测量；2、在6个更远的星系中的造父变星用来校准Ia超新星的光度；3、深嵌于数亿光年外的膨胀宇宙中的星系中的Ia超新星——一种遥远而明亮的量天尺，被用于精确测定哈勃常数。

An indirect spectrophotometric method was used to determine the content of lactide. The factors on the determination, such as the type of solvent, acid and alkali dosage, the time of aminolysis reaction and so on, were discussed.

采用间接光度法测定粗丙交酯中丙交酯的含量，讨论了溶剂类型、胺解反应时间、酸碱用量等因素对测定结果的影响。

Conclusion］ The method has higher sensitivity,accuracy and precision,could be applied to determine the contents of carboxylic ester,lactone and their complexes.

结论］分光光度法具有较高的灵敏度、准确度和精密度，适用于各种酯或内酯及混合酯总量的测定。

In this paper, we build an method of effective vitamin C in LAPP by UV-spectrometer.

建立了紫外分光光度法测定L-抗坏血酸多聚磷酸酯中有效维生素C含量的方法。

Objective:To develop an assay for the determination of phosphorus level in soya lecithin by spectrophotometry.

提要 目的：研究分光光度法测定大豆磷脂中磷的含量。

With the increase of amylum quantity, the color of each the standard solution iodine combined with amylum changes dark and the its absorbance enlarges, the linear part in standard curve enlarges, while the amylum quantity are 20 ml and 50 ml respectively, the length of linear part in standard curve is not changed, so the optimum quantity of amylum is 20 ml.

对于碘标准系列溶液，随着显色剂淀粉用量的增加，溶液的颜色加深，吸光度在增大，标准曲线的线性部分加长，加入淀粉为20 ml和50 ml时，直线部分的长度变化不大，因此，加入20 ml最为理想。

Conversion of a substance in which the direction of optical rotation is reversed, from the dextrorotatory to the levorotatory or from the levorotatory to the dextrorotatory form.

转化旋光度方向被反向，即以右旋形式到左旋形式或以左旋形式到右旅形式的变化过程中物质的变化

Chemistry Conversion of a substance in which the direction of optical rotation is reversed, from the dextrorotatory to the levorotatory or from the levorotatory to the dextrorotatory form.

转化：旋光度方向被反向，即以右旋形式到左旋形式或以左旋形式到右旅形式的变化过程中物质的变化

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。