Photochemical and Photophysical Properties of Carotenoids and Reactive Oxygen Species: Contradictions Relating to Skin and Vision

Autor: Fritz Boehm, Ruth Edge, T. George Truscott

Publikováno v: Oxygen, Vol 3, Iss 3, Pp 322-335 (2023)

Molecular mechanisms based on photo-physical processes involving dietary carotenoids, their radicals, and the role of oxygen are discussed and used to suggest explanations of the poorly understood and often contradictory results related to mainly ski

Externí odkaz: https://doaj.org/article/20bac7695de24bd7848ba64ab76deda3

The Reactive Oxygen Species Singlet Oxygen, Hydroxy Radicals, and the Superoxide Radical Anion—Examples of Their Roles in Biology and Medicine

Autor: Ruth Edge, T. George Truscott

Publikováno v: Edge, R & Truscott, T G 2021, ' The Reactive Oxygen Species Singlet Oxygen, Hydroxy Radicals, and the Superoxide Radical Anion—Examples of Their Roles in Biology and Medicine ', Oxygen, vol. 1, no. 2, pp. 77-95 . https://doi.org/10.3390/oxygen1020009

Reactive oxygen species comprise oxygen-based free radicals and non-radical species such as peroxynitrite and electronically excited (singlet) oxygen. These reactive species often have short lifetimes, and much of our understanding of their formation

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::09880d16e323114c28c3535b568ddc26
https://doi.org/10.3390/oxygen1020009

Reduction of oxidized guanosine by dietary carotenoids: A pulse radiolysis study

Autor: Ruth Edge, Parimal Gaikwad, T. George Truscott, Suppiah Navaratnam, B.S. Madhava Rao

Publikováno v: Archives of Biochemistry and Biophysics. 504:100-103

Time-resolved pulse radiolysis investigations reported herein show that the carotenoids β-carotene, lycopene, zeaxanthin and astaxanthin (the last two are xanthophylls – oxygen containing carotenoids) are capable of both reducing oxidized guanosin

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::54636cfbd3a48baca588b40174d0d137
https://doi.org/10.1016/j.abb.2010.07.026

Photolysis of carotenoids in chloroform: enhanced yields of carotenoid radical cations in the presence of a tryptophan ester

Autor: Ali El-Agamey, David J. McGarvey, T. George Truscott, Ruth Edge, Edward J. Land, Marc Burke

Publikováno v: Radiation Physics and Chemistry. 72:341-345

The presence of an acetyl tryptophan ester gives rise to enhanced yields of carotenoid radical cations in chloroform following 355 nm laser excitation of the carotenoid, even though the tryptophan does not absorb at this wavelength. The increase is a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::489eac2b13070462ea8efc69949e17bc
https://doi.org/10.1016/j.radphyschem.2003.09.008

Photobiology in Medicine

Autor: Giulo Jori, Roy H. Pottier, Michael A.J. Rodgers, T. George Truscott

Man has recognised an association of light with life and medicine for over 3000 years. Today the major challenges to this topic include the elucidation of photochemical reactions involved in photobiology at the molecular level. This includes the use