光敏的

The Problems of Spectrum, Quantum Yield of Phosphorescence, Photosensitization and Photostabilization of Polymeric Acetophenone and Its Derivatives

高分子苯乙酮及其衍生物的光谱、磷光量子产率及光敏化光稳定问题的研究

In this paper,the form of laser screen and the choice of photosensitive element,laser device, data acquiring board are introduced.

本文介绍激光光幕的形成，光敏元件、半导体激光器和数据采集板的选择等。

Device whose current voltage charact eristic is a function of incident ''.

一种固态光敏电子器件，其电流电压特性是入射光的函数。

A solidstate photosensitive electron device whose current voltage charact eristic is a function of incident radiation.

一种固态光敏电子器件，其电流电压特性是入射光的函数。

The tryptophan residues play important roles in DNA photoreactivation catalyzed by CPD photolyases. We have investigated the action mechanism concerning Trp in DNA photoreactivation, and obtained the results as follows: 1 We proposed a mechanism of photosensitized splitting of CPDs by Trp and Trp-containing peptides. 2 Quantum yields of splitting of the model compounds that a Trp linked covalently a CPD were obtained under 290 nm light in various solvents, these values changing with solvent, range from 0.01 to 0.5. 3 Utilizing pulse radiolysis technique, splitting processes were observed in aqueous solution of the CPDs with hydrated electron and some oxidative species (such as hydroxyl radical, bromic radical and azide radical), and obtained their rate constants. In the case of interaction between CPD and hydrated electron, splitting of the CPD anion, and pyrimidine anion transfer an electron to FAD or Rf, were observed. The process rate was slower one order more than that in photolyase. Minor, but highly mutagenic UV-light-induced lesions are (6-4) photoproducts, which are repaired by (6-4) photolyases. These enzymes, discovered in 1993, are not well characterized and their mechanism is still under investigation.

我们研究它的作用机理，获得以下结果：1）建立了色氨酸及其肽对嘧啶二聚体光敏化裂解的直接修复作用机理模型；2）获得了色氨酸共价键连接于嘧啶二聚体的化合物在多种溶剂中290nm光辐照裂解的量子效率，其值随溶剂而变化，范围在0.01-0.5；3）运用脉冲辐解观察到嘧啶二聚体与水合电子和一些氧化性的自由基作用裂解过程，得到相应速率常数；对二聚体与水合电子作用发生裂解以及向FAD返还电子的过程进行了体外模拟；4）（6-4）光解酶的作用机理中一个关键假定是氧杂环丁烷中间体在接受电子后能自发裂解，恢复二嘧啶的结构。

The transducer detects continuos position data of the incident light spot moving on the whole plane without dead zone.

该传感器不存在测量死区，可给出入射光点在整个光敏面上移动时的连续性位置数据。

Studies of the effect of various active oxygen quenchers on HC-B Photosensitized oxidation of bilirubin indicated that in serum both free radical reactions and singlet oxygen reaction seem to occur simutanously.

比较在不同溶剂中各种活性氧淬灭剂对胆红素光氧化的抑制作用，指出血清胆红素光敏氧化反应包括自由基氧化反应和单态氧氧化反应等多重机制。

In the meanwhile, the TS characteristics of a scattering particle and their relationship are studied when it is passing through the scattering area, In addition to this, the distribution function of particles' shape is defenited in terms of math's method and a new method is putout of which the distribution of particles' shape is captured in according to the power spectrum and spectral distribution characterist of light scattering and finally, the utility of the perturbation ameliorating method and the effect of the particles' shape is modified, so far, the accuracy of measurement of the particles' size is improved effectively.

对此，本文在以Mie散射理论为原理，依据前向接收器接收的前向散射光信息以获取微粒大小信息的测量基础上，对微粒穿越光敏区时的时域与空域的特征以及相关性开展了研究，从数学上定义了微粒的形体分布函数，提出了一种依据光散射功率潜和频谱分布特征来获取微粒形体分布信息的方法，完善了微扰修正理论的应用性，有效地改善了形体的影响问题，从而可提高微粒粒度分布测量结果的准确性。

And cleaning optical mouse, the main wash attached to the LED and a phototransistor on the dirt.

而清洗光电鼠标，主要清洗附着在以光二极管和光敏三极管上的污垢。

With the optical chopper sensor composed of launch diodes and phototransistor.

传感器由发射二极管和光敏三极管组成的光断续器。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。