What are carotenoids, xanthophylls, rectinol, retinal, 11-cis-retinal and retinoic acid?

Principles Of Radiographic Imaging: An Art And A Science
6th Edition
ISBN:9781337711067
Author:Richard R. Carlton, Arlene M. Adler, Vesna Balac
Publisher:Richard R. Carlton, Arlene M. Adler, Vesna Balac
Chapter13: X-ray Interactions
Section: Chapter Questions
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  1. Carotenoids & vitamin A
  • What are carotenoids, xanthophylls, rectinol, retinal, 11-cis-retinal and retinoic acid?
  • Describe the absorption and transport of carotenoids and vitamin A.
  • Why carotenoids and vitamin A are unstable when expose to air or light?
  • Using chemical symbols or structures, illustrate the quenching of singlet oxygen by Vitamin A. What happens to the energy carried by singlet oxygen? Where does this energy come from in the first place?
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