Results 31 to 40 of about 190,081 (257)
Theory of the Dark State of Polyenes and Carotenoids [PDF]
, 2022 A theory is developed to describe the singlet dark state (usually labeled S1 or 2Ag) of polyenes and carotenoids. The theory assumes that in principle this state is a linear combination of a singlet triplet-pair and an odd-parity charge-transfer exciton.
arxiv +1 more source
Carotenoid biosynthesis and overproduction in Corynebacterium glutamicum [PDF]
, 2012 Heider S, Peters-Wendisch P, Wendisch VF. Carotenoid biosynthesis and overproduction in Corynebacterium glutamicum. BMC Microbiology. 2012;12(1): 198.Background Corynebacterium glutamicum contains the glycosylated C50 carotenoid decaprenoxanthin as ...
Heider, Sabine +2 more
core +2 more sources
Marine Drugs, 2011 Marine animals contain various carotenoids that show structural diversity. These marine animals accumulate carotenoids from foods such as algae and other animals and modify them through metabolic reactions.
Takashi Maoka
doaj +1 more source
Biophysical Journal, 1992 The apparent quantum yield of singlet-singlet spirilloxanthin-to-bacteriochlorophyll a energy transfer increases linearly with the residual spirilloxanthin content in Rhodospirillum rubrum membrane vesicles from which this carotenoid has been partially removed.
Juan M. RamÃrez +2 more
openaire +3 more sources
Singlet Triplet-Pair Production and Possible Singlet-Fission in Carotenoids [PDF]
arXiv, 2021 Internal conversion from the photoexcited state to a correlated singlet triplet-pair state is believed to be the precursor of singlet fission in carotenoids. We present numerical simulations of this process using a pi-electron model that fully accounts for electron-electron interactions and electron-nuclear coupling. The time-evolution of the electrons
arxiv
Two stage process of microalgae cultivation for starch and carotenoid production [PDF]
, 2016 Biotechnological processes based on microalgae cultivation are promising for several industrial applications. Microalgae are photoautotrophic microorganisms and can thus grow by using renewable and inexpensive resources as sunlight, inorganic salts ...
Altimari, Pietro +6 more
core +1 more source
Excited state characterization of carbonyl containing carotenoids: a comparison between single and multireference descriptions [PDF]
, 2017 Carotenoids can play multiple roles in biological photoreceptors thanks to their rich photophysics. In the present work, we have investigated six of the most common carbonyl containing carotenoids: Echinenone, Canthaxanthin, Astaxanthin, Fucoxanthin, Capsanthin and Capsorubin.
arxiv +1 more source
Theory of Singlet Fission in Carotenoid Dimers [PDF]
arXiv, 2023 We develop a theory of singlet fission in carotenoid dimers. Following photoexcitation of the 'bright' state (i.e., a singlet electron-hole pair) in a single carotenoid, the first step in the singlet fission process is ultrafast intramolecular conversion into the highly-correlated 'dark' (or 2Ag) state.
arxiv
Absorption and Metabolism of Xanthophylls
Marine Drugs, 2011 Dietary carotenoids, especially xanthophylls, have attracted significant attention because of their characteristic biological activities, including anti-allergic, anti-cancer, and anti-obese actions.
Eiichi Kotake-Nara, Akihiko Nagao
doaj +1 more source
Vibronic coupling explains the ultrafast carotenoid-to-bacteriochlorophyll energy transfer in natural and artificial light harvesters [PDF]
, 2015 The initial energy transfer in photosynthesis occurs between the light-harvesting pigments and on ultrafast timescales. We analyze the carotenoid to bacteriochlorophyll energy transfer in LH2 Marichromatium purpuratum as well as in an artificial light-harvesting dyad system by using transient grating and two-dimensional electronic spectroscopy with 10 ...
arxiv +1 more source