Vitamin D effective ultraviolet wavelengths due to scattering in shade

D J Turnbull; A V Parisi; Michael G Kimlin

doi:10.1016/j.jsbmb.2005.04.039

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Vitamin D effective ultraviolet wavelengths due to scattering in shade

Journal article

Open access

Peer reviewed

Vitamin D effective ultraviolet wavelengths due to scattering in shade

D J Turnbull, A V Parisi and Michael G Kimlin

Journal of Steroid Biochemistry and Molecular Biology, Vol.96(5), pp.431-436

2005

DOI: https://doi.org/10.1016/j.jsbmb.2005.04.039

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Abstract

shade

scattered UV

vitamin D

UVB

UVA

action spectra

Solar UVB radiation (280-320 nm) is an initiator of Vitamin D3 production in the human skin. While numerous studies have been conducted in relation to the biological impact of UV exposure in full sun, less research has investigated the irradiances in shade. The purpose of this study was to determine the levels of UV radiation in relation to Vitamin D3 induction with six commonly encountered shade environments for the larger solar zenith angles observed during autumn and winter. Spectral UV irradiance measurements were made under relatively clear sky conditions at a sub-tropical Southern Hemisphere site for six specific shade environments and solar zenith angle between 35°and 60°to investigate the biologically effective UV irradiances for pre-Vitamin D3 production. Data from this research indicates that pre-Vitamin D3 effective UV wavelengths in the shade were most significant for tree shade and a shade umbrella. Compared to that in full sun, pre-Vitamin D3 effective UV wavelengths were at levels of approximately 52 and 55%, respectively, beneath the shade umbrella and in tree shade. UVB irradiance levels in the shade of a northern facing covered veranda and in a car with windows closed were significantly less than those beneath the shade umbrella, with levels of approximately 11 and 0%, respectively, of those in full sun. Shade is important as a UV minimisation strategy; however, it may also play an important role in providing the human body with adequate levels of UVB radiation for pre-Vitamin D3 production without experiencing the relatively higher levels of UVA irradiances present in full sun. © 2005 Elsevier Ltd. All rights reserved.

Details

Title: Vitamin D effective ultraviolet wavelengths due to scattering in shade
Authors: D J Turnbull (Author) - University of Southern Queensland
A V Parisi (Author) - University of Southern Queensland
Michael G Kimlin (Author) - Queensland University of Technology
Publication details: Journal of Steroid Biochemistry and Molecular Biology, Vol.96(5), pp.431-436
Publisher: Pergamon
Date published: 2005
DOI: 10.1016/j.jsbmb.2005.04.039
ISSN: 0960-0760
Copyright note: Copyright © 2005. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ The final version is available at http://dx.doi.org/10.1016/j.jsbmb.2005.04.039
Organisation Unit: University of the Sunshine Coast, Queensland; School of Health and Sport Sciences - Legacy
Language: English
Record Identifier: 99449319902621
Output Type: Journal article

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Collaboration types: Domestic collaboration
Web Of Science research areas: Biochemistry & Molecular Biology; Endocrinology & Metabolism

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