نتایج جستجو برای: ultraviolet rays

تعداد نتایج: 79452  

2016
Marie Z. Le Clair Myles G. Cockburn

PURPOSE Exposure to ultraviolet radiation (UVR) from indoor tanning devices is thought to cause melanoma and other negative health consequences. Despite these findings, the practice of indoor tanning in the United States remains prevalent. In this paper we aim to present a clear discussion of the relationship between indoor tanning and melanoma risk, and to identify potential strategies for eff...

Journal: :Journal of plankton research 2011
Bettina Sonntag Monika Summerer Ruben Sommaruga

The recurrent depth preference of three ciliate species (two prostomatids and one haptorid) in a transparent alpine lake indicates the existence of niche partitioning among them involving potential factors such as avoidance of high ultraviolet radiation levels and zooplankton predation, as well as competition for food resources.

Journal: :Chemical communications 2010
Peng Chen Li Gu Xiudong Xue Mingjuan Li Xuebo Cao

We demonstrate the engineered growth of TiO(2) nanotube arrays on flexible carbon fibre sheets. The modification not only enables the textile to absorb ultraviolet light efficiently but also imparts large surface area and mesoporosity to the textile. This flexible nanoarchitecture greatly facilitates the purification of organic wastewater.

Journal: :Photochemistry and photobiology 2008
Brian Diffey

Determining the variability of solar UV exposure of different members of a population by direct measurement demands high compliance over an extended period of time by a large number of people. An alternative approach is to model the variables that affect personal exposure and this is the basis of the method reported here, which uses a random sampling technique to explore variability of exposure...

Journal: :CMAJ : Canadian Medical Association journal = journal de l'Association medicale canadienne 2000
F R de Gruijl J C van der Leun

Journal: :Proceedings of the National Academy of Sciences of the United States of America 1944
L J Stadler

2015
Rebeca Núñez-Lozano Belén Pimentel José R Castro-Smirnov Mauricio E Calvo Hernán Míguez Guillermo de la Cueva-Méndez

A hybrid nanostructured organic-in-organic biocompatible film capable of efficiently blocking a preselected range of ultraviolet light is designed to match the genotoxic action spectrum of human epithelial cells. This stack protects cultured human skin cells from UV-induced DNA lesions. As the shielding mechanism relies exclusively on reflection, the secondary effects due to absorption harmful ...

Journal: :Cancer research 1977
N R Morin P E Zeldin Z O Kubinski P K Bhattacharya H Kubinski

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