Concurrent evaluation of personal damaging and beneficial UV exposures over an extended period

Wainwright, L. K. and Parisi, A. V. and Downs, N. J. (2017) Concurrent evaluation of personal damaging and beneficial UV exposures over an extended period. Journal of Photochemistry & Photobiology, B: Biology, 170. pp. 188-196. ISSN 1011-1344

Abstract

Personal exposure to solar ultraviolet radiation (UVR) is acknowledged as having both positive and negative effects on human health. This study aimed to measure concurrently the personal erythemal UV, UVA and vitamin D effective exposures of participants in each season of a year. Participants were all indoor office workers located at two different sites less than 6.5 km apart at the sub-tropical location of Toowoomba (27°33′S 151°55′E). The subjects wore a combined dosimeter badge horizontally on the shoulder for a minimum of one week in each season; this badge used methoxypsoralen film to record the UVA waveband and polyphenylene oxide film for the erythemal and the vitamin D effective UV wavebands. The results show that median erythemal exposure was highest during the spring and lowest during winter, as was the vitamin D effective exposure. Median UVA exposures were at a similar level in winter and summer, autumn was higher (double) and spring at a lower level.
The duration and time of day participants spent outdoors changed in each season; in winter, participants spent an average of 101 minutes outdoors between 10:00–14:00 h over the week, whereas in summer this fell to 79 minutes even though they were outdoors more often. The daily UVA/UVB ratio is lowest between 10:00–14:00 hand also changes with the season resulting in the differences between the distributions of exposure for each of the wavebands. Each category of exposures must be assessed individually as each season and each waveband has different distributions. The results also demonstrate that the dual film dosimeter developed and characterized with a calibration to three different biological responses, is an effective device for the concurrent measurement of erythemal UV, UVA and vitamin D effective UV exposures for periods of up to seven days.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Files associated with this item cannot be displayed due to copyright restrictions.
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Agricultural, Computational and Environmental Sciences
Date Deposited: 19 Oct 2017 02:44
Last Modified: 23 Aug 2018 03:12
Uncontrolled Keywords: dosimeter; UVB; PPO; vitamin D; erythema; UVA;
Fields of Research : 02 Physical Sciences > 0299 Other Physical Sciences > 029903 Medical Physics
02 Physical Sciences > 0299 Other Physical Sciences > 029901 Biological Physics
04 Earth Sciences > 0401 Atmospheric Sciences > 040103 Atmospheric Radiation
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970106 Expanding Knowledge in the Biological Sciences
E Expanding Knowledge > 97 Expanding Knowledge > 970102 Expanding Knowledge in the Physical Sciences
Identification Number or DOI: 10.1016/j.jphotobiol.2017.04.013
URI: http://eprints.usq.edu.au/id/eprint/31750

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