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Article
Dose-response effect of sunlight on vitamin D2 production in Agaricus bisporus mushrooms. Paul Urbain, and Jette Jakobsen J. Agric. Food Chem., Just Accepted Manuscript • DOI: 10.1021/acs.jafc.5b02945 • Publication Date (Web): 28 Aug 2015 Downloaded from http://pubs.acs.org on September 10, 2015
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Journal of Agricultural and Food Chemistry is published by the American Chemical Society. 1155 Sixteenth Street N.W., Washington, DC 20036 Published by American Chemical Society. Copyright © American Chemical Society. However, no copyright claim is made to original U.S. Government works, or works produced by employees of any Commonwealth realm Crown government in the course of their duties.
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Journal of Agricultural and Food Chemistry
TITLE PAGE
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Title
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Dose-response effect of sunlight on vitamin D2 production in Agaricus bisporus
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mushrooms.
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Authors
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Paul Urbain *,1, Jette Jakobsen 2
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1
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Germany
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University Medical Center Freiburg, Section of Clinical Nutrition and Dietetics,
Technical University of Denmark, National Food Institute, Denmark
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Corresponding author
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Paul Urbain (PhD)
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University Medical Center Freiburg
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Section of Clinical Nutrition and Dietetics
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Hugstetterstr 55, 79106 Freiburg, Germany
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phone: +49-761-2703360
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fax: +49-761-2703334
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e-mail:
[email protected] 1 ACS Paragon Plus Environment
Journal of Agricultural and Food Chemistry
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ABSTRACT
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The dose response effect of UV-B irradiation from sunlight on vitamin D2 content of
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sliced Agaricus bisporus (white button mushroom) during the process of sun-drying
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was investigated.Real-time UV-B and UV-A data were obtained using a high-
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performance spectroradiometer. During the first hour of sunlight exposure, the
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vitamin D2 content of the mushrooms increased in a linear manner, with
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concentrations increasing from 0.1 µg/g up to 3.9 ± 0.8 µg/g dry weight (DW). At the
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subsequent two measurements one and three hours later, respectively, a plateau
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was reached. Two hours of additional exposure triggered a significant decline in
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vitamin D2 content. After just 15 min of sun exposure and an UV-B dose of 0.13
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J/cm2, the vitamin D2 content increased significantly to 2.2 ± 0.5 µg/g DW (P
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