| Controllable spectrum artificial sunlight source system using LEDs with 32 different peak wavelengths of 385-910 nm. | |
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MedLine Citation:
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PMID: 21365668 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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This study developed a lighting system that produces an approximate spectral irradiance (SI) of ground level sunlight in the wavelength range of 385-910 nm (GLS(385-910) ) using 547 light-emitting diodes (LEDs) with 32 different peak wavelengths. The produced SI can be modified over an arbitrary wavelength band. The SI at the light outlet reached up to 1/2 of the GLS(385-910) of a sunny April day, although the produced SI deviated from the GLS(385-910) at some wavelengths. For subsequent experiments, the reference SI was defined as 1/4 GLS(385-910) of a sunny April day. The SI produced from the lighting system was adjusted to approximate the reference SI. The ratios of the produced SI and the reference SI were within 0.72-1.28. As an application of the lighting system for biological studies, the transmitted SI of a green leaf of perilla (Perilla frutescens L.) was investigated. The curve shape of the transmitted SI, which had characteristically low transmission percentages of blue and red light, reflected the characteristics of the absorption spectra of chlorophylls. The lighting system is therefore potentially beneficial for use in diagnosing physiological conditions of plant leaves, although its application is not limited to plant physiological studies. Bioelectromagnetics 32:243-252, 2011. © 2010 Wiley-Liss, Inc. |
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Authors:
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Kazuhiro Fujiwara; Akira Yano |
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Publication Detail:
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Type: Journal Article Date: 2010-12-15 |
Journal Detail:
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Title: Bioelectromagnetics Volume: 32 ISSN: 1521-186X ISO Abbreviation: Bioelectromagnetics Publication Date: 2011 Apr |
Date Detail:
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Created Date: 2011-03-02 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8008281 Medline TA: Bioelectromagnetics Country: United States |
Other Details:
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Languages: eng Pagination: 243-52 Citation Subset: IM |
Copyright Information:
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Copyright © 2010 Wiley-Liss, Inc. |
Affiliation:
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Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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