28 April 2008 UV-biosensor for visual indication of vitamin D synthesis
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Proceedings Volume 7003, Optical Sensors 2008; 70031O (2008); doi: 10.1117/12.780196
Event: SPIE Photonics Europe, 2008, Strasbourg, France
Abstract
Excessive UV doses have adverse effects on human health, but proper amount of UV is beneficial for people and is essential in the natural production of vitamin D# in skin. Most of broadband UV-radiometers that have an output in sunburn units are incapable to record correctly the vitamin D synthetic capacity of sunlight because of the difference between the CIE erythema and 'Vitamin D synthesis' action spectra. The liquid-crystalline UV sensor based on provitamin D photoconversions has been developed for direct observation of vitamin D synthesis under UV irradiation. UV-induced transformation of provitamin D in cholesteric liquid-crystalline matrix is accompanied by the change of cholesteric pitch value in the LC cell. The developed UV biosensor makes possible both instrumental and visual monitoring of the vitamin D synthetic capacity of sunlight and/or artificial UV source.
© (2008) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
T. N. Orlova, I. P. Terenetskaya, "UV-biosensor for visual indication of vitamin D synthesis", Proc. SPIE 7003, Optical Sensors 2008, 70031O (28 April 2008); doi: 10.1117/12.780196; https://doi.org/10.1117/12.780196
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KEYWORDS
Ultraviolet radiation

Liquid crystals

Absorption

Visualization

Sun

Ozone

Biosensors

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