紫外线

Content (and to a very small extent on the amount of Phe and disulfide bonds).

在紫外线附近，蛋白质的光吸收决定于酪氨酸和色氨酸的含量（苯丙氨酸和二硫键有小量影响

Crossover network divide frequencies out to each specific loudspeaker component,proper phasing and precision frequency rolloff allow each loudspeaker to perform at it best.

独特的聚炳烯低音盆配抗紫外线丁基橡胶复合折环，提供持久稳定的弹性刚力，保证各种恶劣环境下音盆稳定的线性位移，赋予音盆极为优异的频率响应。

Cholecalciferol is produced by irradiation of 7-dehydrocholesterol with ultraviolet light either from the sun or from an artificial source.

胆钙化醇是7？脱氢胆固醇经日光或人工来源的紫外线照射而产生的。

Methods: The influences of temperature, the length of time, the ultraviolet ray shines and alkaline materials on chloral hydrate in the mixture were researched with retitration method.

采用回滴定的方法，分别对温度、存放时间、紫外线照射以及碱性物质对本品中水合氯醛的影响加以研究。

The American company says most UV water-___12___ systems put into homes have one or more ___13___. These use carbon or ___14___ to catch ___15___.

这家美国公司表示，大部分家庭使用的紫外线水净化系统一般有一个或更多的过滤器，这些过滤器用碳或是滤网来过滤杂质。

The constant light gives off no U.V. rays, and can be designed to emit almost any color of light desired. PureEnergySystems

这个稳定的光源不会释放紫外线，而且经过被设计，可以发出几乎各种颜色的光源。

For maintain the genome integrity and fidelity. DNA repair processes are classified into pathways responsible for repairing specific classes of DNA damage, although recent data indicated that some proteins function in multiple pathways. Base excision repair occurs through excision of a damaged region, followed by fill-in repair synthesis using the opposite strand as a template. Mismatch repair operates on base mismatched and small loop-outs that arising during replication by misincorporation or slippage on the template strand. Nucleotide excision repair removes photoproducts from u.v. radiaton and bulky adducts from a multiple of chemicals. DNA double-strand breaks may be rectified by either homologous recombination repair and nonhomologous end joining pathways where both strands of the DNA duplex are damaged.

DNA修补基因可藉由不同的机制对不同程度的DNA损害进行修复，虽然近来已有文献指出，一些DNA修复蛋白可能参与多种DNA修复机制，不过一般可分为下列四种DNA修复机制：碱基删除修复(Base Excision Repair； BER)，即对较小的DNA损伤，进行修复；核苷酸错误配对删除修复，即对复制时所产生的核苷酸配对错误或模板滑动造成的DNA损害进行修复；核苷酸删除修复(Nucleotide Excision Repair； NER)，即对因紫外线或有机化合物所造成的较大损伤进行修复；以及双股DNA断裂修复(Double-Strand Breaks； DSBs)，即对双股DNA断裂进行修复，此机制又可分为同源染色体的重组与末端接合两种主要路径，对受损的DNA进行修复。

Every August for the past 20 years or so, the ozone layer over the South Pole, that shields us from the sun's ultraviolet or UV rays has been thinning out, creating a so-called hole.

凯兰 近20年来每逢8月，南极上空保护人们不受太阳紫外线伤害的臭氧层就开始变薄，产生一个&空洞&。

Finsen:Danish physician.

&芬森：丹麦医师，因首创用紫外线法治疗皮肤病而获1903年诺贝尔奖。&

In Punta Arenas, residents have to cope with radiation alerts when ozone depletion is so severe that it becomes highly dangerous to expose skin or eyes to the sun.

在Punta Arenas，居民得应对紫外线警报，当臭氧层遭到很严重破坏时，把皮肤或者眼睛暴露在太阳光之下是很危险的。

The somatic cell count of goat milk is higher than that of cow and sheep milk due to its apocrine secretory system.

山羊奶特殊的顶浆分泌机制使正常山羊奶的体细胞数要高于正常牛奶和绵羊奶。

Third, based on the example of over proof on-load loss in 180MVA/220kV power transformer, the eddy loss in winding is analyzed with the leakage flux element software. Some conclusions with practical use are given. In order to reduce the load loss, primarily we should reduce radial leakage flux of transformer possibily.

运用漏磁场分析软件，以180MVA/220kV电力变压器负载损耗超标为例，进行详细分析，提出有工程实用价值的结论：降低变压器负载损耗，从根本上应尽可能减少变压器辐向漏磁。