In-situ monitoring of biologically active solar UV-B radiation: a new biosensor of vitamin D synthetic capacity

Irina P. Terenetskaya; I. A. Gvozdovskyy

doi:10.1117/12.429721

12 June 2001 In-situ monitoring of biologically active solar UV-B radiation: a new biosensor of vitamin D synthetic capacity

Irina P. Terenetskaya, I. A. Gvozdovskyy

Author Affiliations +

Proceedings Volume 4425, Selected Papers from the International Conference on Optoelectronic Information Technologies; (2001) https://doi.org/10.1117/12.429721
Event: International Conference on Optoelectronic Information Technologies, 2000, Vinnytsia, Ukraine

Abstract

The new biosensor of vitamin D synthetic capacity of solar/artificial UV-B radiation is based on liquid crystal with provitamin D dopant. Nematic liquid crystals (LC-805, ZLI-1695) are converted into induced cholesteric phase using photosensitive steroid biomolecules of provitamin D₃ (7- dehydrocholesterol). During UV exposure remarkable decrease in the number of the Cano-Grandjean stripes has been observed in the wedge-like cell as a result of UV initiated photoisomerization of provitamin D₃ that changed helical twisting power of the dopant molecules.

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Irina P. Terenetskaya and I. A. Gvozdovskyy "In-situ monitoring of biologically active solar UV-B radiation: a new biosensor of vitamin D synthetic capacity", Proc. SPIE 4425, Selected Papers from the International Conference on Optoelectronic Information Technologies, (12 June 2001); https://doi.org/10.1117/12.429721

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