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Quantum yield for the photo-degradation of vitamin D3.
van Dijk, Arjan.
Afiliação
  • van Dijk A; RIVM, Bilthoven, The Netherlands. Arjan.van.Dijk@RIVM.nl.
Photochem Photobiol Sci ; 16(5): 690-693, 2017 May 17.
Article em En | MEDLINE | ID: mdl-28281718
Ultraviolet radiation can photodegrade vitamin D3 to suprasterol I, superasterol II and 5,6-transvitamin D3. The probability of the photodegradation of vitamin D3, after the absorption of one photon, is called the quantum yield. We estimated the quantum yield ϕ for all the degeneration reactions together on the basis of the results reported by Webb et al. (1989) for a degradation experiment on pure, tritiated vitamin D3 in methanol in sunlight. We find ϕ = (0.42 ± 0.1). This value of the quantum yield can be used to estimate the kinetics contribution from vitamin D3 degradation in exposure experiments and model calculations.
Assuntos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Teoria Quântica / Luz Solar / Colecalciferol Limite: Humans Idioma: En Ano de publicação: 2017 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Teoria Quântica / Luz Solar / Colecalciferol Limite: Humans Idioma: En Ano de publicação: 2017 Tipo de documento: Article