Results 261 to 270 of about 42,053 (296)
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PHOTOCHEMISTRY OF RETINOCHROME
Photochemistry and Photobiology, 1981Abstract— Retinochrome is a photopigment found in the visual cells of cephalopods. It has been considered to act as a supplier of the 11‐cis‐retinal required for synthesis of rhodopsin, because its all‐trans chromophore is isomerized to 11‐cis form in the light.
Tǒru Yoshizawa +3 more
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Nature, 1967
The only action of light on the pigment of cone vision, iodopsin, as on the rod pigment rhodopsin, is to isomerize its chromophore from 11-cis to all-trans. All further changes are “dark” consequences of this one light reaction. Although this reaction initiates bleaching, its immediate product is a more intense pigment. At low temperatures in the dark,
Tôru Yoshizawa, George Wald
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The only action of light on the pigment of cone vision, iodopsin, as on the rod pigment rhodopsin, is to isomerize its chromophore from 11-cis to all-trans. All further changes are “dark” consequences of this one light reaction. Although this reaction initiates bleaching, its immediate product is a more intense pigment. At low temperatures in the dark,
Tôru Yoshizawa, George Wald
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2003
The breadth of scientific and technological interests in the general topic of photochemistry is truly enormous and includes, for example, such diverse areas as microelectronics, atmospheric chemistry, organic synthesis, non-conventional photoimaging, photosynthesis, solar energy conversion, polymer technologies, and spectroscopy.
William M Horspool +2 more
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The breadth of scientific and technological interests in the general topic of photochemistry is truly enormous and includes, for example, such diverse areas as microelectronics, atmospheric chemistry, organic synthesis, non-conventional photoimaging, photosynthesis, solar energy conversion, polymer technologies, and spectroscopy.
William M Horspool +2 more
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Photochemistry in Nature and Applied Photochemistry
2016Several photochemical reactions of organic compounds are occurring in nature for the evolution of life and their existence on earth. Such evolutionary processes of life have been brought about by photochemical reactions of organic molecules. Among these photochemical reactions, photosynthesis of plants, vision of animals and depletion of stratospheric ...
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Nature, 1963
IN the course of an investigation of the ultra-violet irradiation of solid films of uracil and thymine1, certain inconsistencies were observed in the irradiation of thymine films which were unexplainable at the time and therefore not reported. Information now available has led to an investigation of the influence of humidity, more properly the vapour ...
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IN the course of an investigation of the ultra-violet irradiation of solid films of uracil and thymine1, certain inconsistencies were observed in the irradiation of thymine films which were unexplainable at the time and therefore not reported. Information now available has led to an investigation of the influence of humidity, more properly the vapour ...
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Experientia, 1962
Le spectre d'absorption, les caracteristiques luminescentes et photochimiques de la riboflavine sont presentes. L'interpretation des donnees experimentales d'autres auteurs sur la decomposition photochimique de l'eau sensibilisee par la riboflavine est critiquee.
Judith S. Bellin +2 more
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Le spectre d'absorption, les caracteristiques luminescentes et photochimiques de la riboflavine sont presentes. L'interpretation des donnees experimentales d'autres auteurs sur la decomposition photochimique de l'eau sensibilisee par la riboflavine est critiquee.
Judith S. Bellin +2 more
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Photochemistry of Bromofluorobenzenes
The Journal of Physical Chemistry A, 2006The photochemistry of low lying excited states of six different fluorinated bromobenzenes has been investigated by means of femtosecond laser spectroscopy and high level ab initio CASSCF/CASPT2 quantum chemical calculations. The objective of the work was to investigate how and to what extent light substituents, position on the benzene ring and number ...
Petter Persson +6 more
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Experientia, 1971
Per azione della luce ultravioletta la bilirubina disciolta in CHCl3-CH3OH somma una molecola di metanolo fornendo un prodotto per il quale si dimostra la struttura III. Tale reazione, osservata anche con altri alcooli, suggerisce la possibilita che parte della bilirubina del siero dei neonati itterici sottoposti a fototerapia venga eliminata sotto ...
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Per azione della luce ultravioletta la bilirubina disciolta in CHCl3-CH3OH somma una molecola di metanolo fornendo un prodotto per il quale si dimostra la struttura III. Tale reazione, osservata anche con altri alcooli, suggerisce la possibilita che parte della bilirubina del siero dei neonati itterici sottoposti a fototerapia venga eliminata sotto ...
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1994
The breadth of scientific and technological interests in the general topic of photochemistry is truly enormous and includes, for example, such diverse areas as microelectronics, atmospheric chemistry, organic synthesis, non-conventional photoimaging, photosynthesis, solar energy conversion, polymer technologies, and spectroscopy.
R B Cundall +5 more
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The breadth of scientific and technological interests in the general topic of photochemistry is truly enormous and includes, for example, such diverse areas as microelectronics, atmospheric chemistry, organic synthesis, non-conventional photoimaging, photosynthesis, solar energy conversion, polymer technologies, and spectroscopy.
R B Cundall +5 more
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Chemischer Informationsdienst, 1985
Organic photochemical reactions conducted in micellar solutions are reviewed from the standpoint of systematizing and correlating published results. Five common effects are found to distinguish and characterize micellar photochemistry relative to conventional solution photochemistry: “super” cage effects, local concentration effects, viscosity effects,
G. S. Cox +2 more
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Organic photochemical reactions conducted in micellar solutions are reviewed from the standpoint of systematizing and correlating published results. Five common effects are found to distinguish and characterize micellar photochemistry relative to conventional solution photochemistry: “super” cage effects, local concentration effects, viscosity effects,
G. S. Cox +2 more
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