光

A pearlitic steel is composed of numerous pearlitic colonies with random orientations, and each colony consists of many parallel lamellas of ferrite and cementite.

珠光体钢由众多随机取向的珠光体团构成，每一珠光体团又包含了许多平行的铁素体和渗碳体片层。

The phosphotungstic acid was used to degrade the methyl orange solution with ultraviolet radiation.

以磷钨酸为光催化剂，在紫外灯照射下，对甲基橙溶液进行光催化降解，考察了几种阴阳离子对磷钨酸光催化降解甲基橙溶液的影响。

Its new applications in environmental engineering are studied, and some suggestions on future research orientation of nanometer TiO 2 photocatalyzer are presented.

综述了近年来纳米TiO2 光催化剂改良的最新技术，包括对其的改性及与其他技术的联合运用，以提高纳米TiO2 的光催化效率；探讨了其在环境工程中的新应用，并就今后纳米TiO2 光催化剂的研究发展方向提出了一些建议。

At present, film photocatalytic is studied mostly for treating with water pollution. Because the film will not bring the secondary pollution, and can be used again. ZnO film and TiO_2 film is mostly used as photocatalyzer, but they have some disadvantage, as they can only absorb little of the sun-light energy, the photoluminescence exciton compounds mostly, and they can be eroded easily by light. Complex semiconductor film is a good method to ravel out these problems.

目前，在光催化治理水污染方面，膜的光催化是一个研究的热点，因为膜催化不存在二次污染且便于回收和重复利用，研究较多的是ZnO薄膜和TiO_2薄膜，但是单一组分的薄膜存在光能利用率低，光激子复合率高，易发生光腐蚀等缺点，复合膜是解决该问题的有效途径，我们提出了全新的复合薄膜的制备方法—混合溶胶法。

The distillation column with a single photochlorination reactor was built in this paper, which is used in the laboratory study. In light initiation, the semi-continuous operation was applied to study the influence of the chlorine flow, the reflux and the height of the packing on photochlorination of acetic acid. Crude MCA with a purity of 90% or more was attained and the feasibility of this technology was proved.

本文建立了适合实验室研究的背包式光氯化反应精馏耦合装置，采用半连续操作的方法，在光引发条件下，考察了氯气流量、回流量和填料高度对乙酸光氯化反应的影响，得到了含量达90％以上的氯乙酸粗品，证实了工艺的可行性。

Mixed chlorotoluenes photo-chlorination experiments in a loop reactor were made, the effects of chlorine flow, temperature and p-/o- chlorotoluene initial ratio on mixed chlorotoluenes photo-chlorination were researched. The relations between the concentration of each component and time under different conditions were measured. The rule and the suitable process parameters of the photochlorination of p-chloromethyl benzene in the side chain were obtained.

本文在环流反应器中进行了邻、对氯甲苯混合光氯化反应试验，分别考察了不同氯气流量、不同氯化温度和不同对/邻氯甲苯初始配比对对、邻氯甲苯侧链光氯化反应的影响，实测了反应液中各组分浓度随时间的变化关系，得出了对、邻氯甲苯的侧链光氯化反应规律和适宜的工艺条件。

A new kind dynamic photoelastic is constructed which includes high-speed photography system and digital image processing system.

本文改进了传统动光弹试验装置，引入高速摄影系统和数字光弹图像处理系统，组成了一种新型动光弹试验系统。

To improve the fabrication technology of photoelectrical encoder,the laser lithography method was introduced.

为了改进光电码盘的制作工艺，提高效率，降低成本，提出了一种光电码盘的光刻方法。

Objective To study the optimal irradiation time and power density in photodynamic therapy with delta-aminolevulinic acid for tumor cells photoinactivation in vitro.

目的 探讨5-氨基酮戊酸光动力学疗法体外伤杀肿瘤细胞的最佳照光时机和最佳照光能量。

Results The strongest photoinactivation effect occured in the HEP-2 cells co-cultured with 1 mmol/L ALA for 8 h. The killing activity of ALA-PDT to the HEP-2 cells was positively correlated with the power density of the irradiation (r=0.88, P＜0.05).Conclusions ALA-PDT can effectively kill the cultured HEP-2 cells in vitro. The optimal killing activity was related to the time and the power density of the laser irradiation.

结果 (1)光照时机选择在ALA与HEP-2细胞培养8 h时杀伤效应最强；(2)ALA-PDT对HEP-2细胞的杀伤效应与照光能量呈正相关r=0.88，P 结论 ALA-PDT能有效地杀伤体外培养的肿瘤细胞，其杀伤最佳效果与照光时机和照光能量有关。

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。