ADEQUATE UV EXPOSURES FOR HEALTHY LIFE: IN SITU MONITORING AND MODEL CALCULATION OF THE VITAMIN-D-SYNTHETIC CAPACITY OF SUNLIGHT

• Main Authors: Irina Terenetskaya, Tetiana Orlova, Pavel Kapinos
• Format: Article
• Language: English
• Published: Academy of Sciences of Moldova, Institute of Chemistry 2012-06-01
• Series: Chemistry Journal of Moldova: General, Industrial and Ecological Chemistry
• Subjects: Solar UV radiation; vitamin D synthesis; UV monitoring; UV biodosimeter; mathematical model
• Online Access: http://www.cjm.asm.md/sites/default/files/article_files/Terenetskaya%20016%20.pdf

Vitamin D which is formed upon UV solar radiation in human skin is essential in many physiological functions. To estimate beneficial vitamin-D-synthetic capacity of sunlight a bio-equivalent UV dosimeter that is based on the same molecular photochemistry from which vitamin D is photosynthesized in human skin has been developed. The examples of an in situ monitoring of the vitamin-D-synthetic capacity of sunlight using an in vitro model of vitamin D synthesis are presented, and various operational principles of the UV biodosimeter are discussed. In addition, reliable algorithm is presented for direct calculation of previtamin D3 accumulation using the photoreaction mathematical model with solar UV spectra as input data. Critical dependence of previtamin D3 accumulation on cloudiness and aerosols is demonstrated.