紫外线辐射

目前已经知道很多关于由紫外线辐射以及在较小程度上由电离辐射引起dna损伤的种类。

A great deal is now known about the kinds of damage produced in the DNA by ultraviolet radiations , to a lesser extent , by ionizing radiations .

致癌的第三大根源是过多接触太阳光或日光浴床中的紫外线辐射而导致的皮肤癌，共有13000起病例。

Too much ultraviolet radiation from the sun or sunbeds , leading to skin cancer , is the third most common cause , with more than 13000 cases .

臭氧是地球防止紫外线辐射的屏障。

Ozone is the earth 's barrier against ultra-violet radiation .

研究发现，志愿者目前的视力与其暴露在阳光下（尤其是导致灼伤的中波紫外线辐射）的时长有很强的相关性。

Strong correlations were found between current eyesight and volunteers ’ lifetime exposure to sunlight , above all UVB radiation ( which is responsible for burning ) .

中波紫外线辐射对人表皮角质形成细胞核因子κB转录活性的影响

Effect of ultraviolet B irradiation on the transcriptional activity of nuclear factor _ κ B in human epidermal keratinocytes

维生素E、C对紫外线辐射致皮肤细胞氧化性损伤的保护作用

The Protecting Effects of Vitamin E and C on Oxidizing Damage of Skin Cell by Ultraviolet Lights

它们都可以帮助阻止紫外线辐射，从而防止植物受到紫外线的伤害DNA发生突变。

They help block ultraviolet radiation , which can mutate plant DNA and damage the photosynthesis that allows a plant to make its food .

结果表明，经紫外线辐射血液输入疗法治疗后的局部脑梗塞灶与对照组比较明显缩小（P＜0.05）；

The results showed that the area of the regional infarction had shrunk to a smaller size than those in the control group ( P < 0.05 ) .

另外本文还探讨了紫外线辐射损伤DNA的可能机制以及保护剂保护DNA的机制。

In addition , this article also explored possible mechanisms of UV damage to DNA , and the mechanisms of protection about that protection agents protect DNA .

目的：评价纳米蒙脱土在紫外线辐射（ultravioletradiation，UVR）所致皮肤损伤中的作用。

Objective : To estimate on the protection effect of montmorillonite on skin damage induced by ultraviolet radiation .

反义c-jun寡核苷酸对成纤维细胞中波紫外线辐射损伤的抑制作用

Inhibitory Action of Antisense c-jun oligodeoxynucleotides on Ultraviolet B Induced Fibroblast Damage

报告注意到，紫外线辐射确实产生有益的作用，主要在皮肤暴露于紫外线辐射的紫外线B（较短波长）部分后产生维生素D方面。

The report notes that UVR does have beneficial effects , mainly in the production of vitamin D following skin exposure to the UVB ( shorter wavelength ) component of UVR .

暴露在紫外线辐射下的无保护的皮肤会产生叫活性氧簇（ROS）的有害化合物。

Unprotected skin exposed to UV radiation generates harmful compounds called reactive oxygen species or ROS .

结果显示电场、紫外线辐射、OH自由基、臭氧和过氧化氢（活性物质和自由基）是导致藻类失活的主要因素。

It was found that the electric fields , ultra-violet radiations , OH radicals , ozone and hydrogen peroxide were the main factors for the inactivation of algae .

阳光中的紫外线辐射是一种非常显著的环境诱变因子，对角质形成细胞的损伤作用已经明确，而维生素C的抗氧化作用也有很多研究，其重要的抗氧化作用越来越受到重视。

Ultraviolet radiation from sunlight is a highly significant factor of environmental mutagenesis . The significant damage to keratinocytes has been testified . Much research on antioxidation of vitamin C has been done .

人体皮肤接受的日光紫外线辐射主要为UVA和UVB。

Human skin receptive solar UV irradiation comprises mainly UVB and UVA .

经紫外线辐射4h后，玻璃纤维的强力下降约50%；

After 4 hours ′ exposure to ultraviolet ray , the fiber strength drops by 50 % approximately ;

汉森的研究小组发现当皮肤处在紫外线辐射之下，三种广泛用于防晒产品中的紫外线过滤成分也会生成活性氧簇ROS。

Hanson 's research team found that three UV filters widely used in sunscreens generate ROS when skin is exposed to UV radiation .

结果长期紫外线辐射后豚鼠背部皮肤出现皱纹、皮肤外观状态改变（红斑、松弛、脱屑），模型组与对照组相比，差异有显著统计学意义（P＜0.05，P＜0.01）；

RESULTS Wrinkling , sagging and erythema were appeared in the dorsal skin of guinea pig induced by UV irradiation . The difference among the model group and control group was significant ( P < 0.05 , P < 0.01 ) .

本文检测了鲱鱼精DNA水溶液和经UVA和UVB紫外线辐射后的拉曼光谱。

Raman spectra of herring sperm DNA in aqueous solution and after UVA & UVB ultraviolet radiation by 0.5h , 1h , 5h were reported .

美国环境工作小组称，这种防晒霜可以抵御两种紫外线辐射：UVA和UVB。

This will protect you against both types of ultraviolet radiation ( UVA and UVB ), says the Environmental Working Group .

臭氧一种气态氧气的同素异形体，O3在紫外线辐射下通过电子放射或暴晒从双原子氧气自然形成。

A blue gaseous allotrope of oxygen , O3 , formed naturally from diatomic oxygen by electric discharge or exposure to ultraviolet radiation .

氧化亚氮（N2O）是主要的温室气体之一，由于其破坏臭氧层，增强了到达地表的紫外线辐射。

Nitric oxide ( N2O ) is one of the main greenhouse gases since it damages the ozone layer and then enhances UV radiation on the earth .

用紫外线辐射同源牙鲆精子，利用冷休克抑制第二极体排放使染色体加倍，培育减数分裂雌核发育二倍体。用2只平行的20W紫外灯管，两灯管相距15cm。

Meiotic gynogenesis in P. olivaceus was induced by cold shocks to the eggs fertilized with UV irradiated sperms .

该浆体平均粒径为110~120nm，在可见光区透光率在90%以上，UV区透光率小于5%，具透明和抗紫外线辐射性能；

The average size of slurry is 110 ~ 120 nm , the transmittance of slurry is above 90 % in visible zone and low than 5 % in UV zone , and the slurry is transparent with good UV resistance .

研究具有抗氧化、抗炎作用的绿茶中的主要活性成分表没食子儿茶酚没食子酸酯（EGCG）对紫外线辐射造成角质形成细胞损伤的保护作用。

The protective effects of ( - ) - epigallocatechin - 3 - gallate ( EGCG ) , the major polyphenolic constituent in green tea , on UV-induced keratinocytes damage .

紫外线辐射后，角质形成细胞NF一KB激活，易位到细胞核，并且促进IL一6的分泌，IL一6可促进成纤维细胞产生MMP。

After UV irradiation , NF-kappa B in keratinocytes was activated and translocated into nucleus to facilitate IL-6 secretion . MMP-1 and MMP-3 production in fibroblasts could be enhanced by IL-6 that was secreted by keratinocytes after UV-irradiation .

PCF能保护豚鼠背部皮肤免受紫外线辐射所致的皮肤皱纹、松弛及红斑，且在一定浓度范围内（5%至20%），随PCF浓度升高，保护作用增强；

PCF ( 5 % and 20 % ) was found to greatly protect the dorsal skin of guinea pig against wrinkling , sagging and erythema induced by UV irradiation in a concentration-dependent manner .

通过TitanKrios电子显微镜，科学家观察到了过去无法想像的病毒细节，解密了它耐热、耐旱、还抗紫外线辐射的机制。

Using a Titan Krios electron microscope to examine the specimens in previously unimaginable detail , scientists have unlocked the basic mechanism of resistance to heat , desiccation , and ultra-violet radiation .

结论：中波紫外线辐射并不能直接导致角质形成细胞分泌MMP-1和MMP-3增加，但紫外线辐射后角质形成细胞分泌的IL-6可促进成纤维细胞产生MMP。

Conclusion : MMP-1 and MMP-3 secreted by keratinocytes could not be induced by UVB directly , but MMP-1 and MMP-3 produced by fibroblasts could be promoted by IL-6 that was secreted by keratinocytes after UV-irradiation .