Results 291 to 300 of about 98,956 (351)
Some of the next articles are maybe not open access.
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,
T, Yoshizawa, G, 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,
T, Yoshizawa, G, Wald
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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.
R, Hara +3 more
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Photochemistry and Photobiology, 1968
Abstract— A method of dosimetry which is useful in analyzing complex photochemical reactions involving more than one photoproduct is described. This involves determining a photochemical cross section for each of the products, σB, σc…., and an absorption cross section σ. for the reacting species.
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Abstract— A method of dosimetry which is useful in analyzing complex photochemical reactions involving more than one photoproduct is described. This involves determining a photochemical cross section for each of the products, σB, σc…., and an absorption cross section σ. for the reacting species.
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Journal of the American Chemical Society, 2020
Azobenzene is one of the most ubiquitous photoswitches in photochemistry and a prototypical model for photoisomerizing systems. Despite this, its wavelength-dependent photochemistry has puzzled researchers for decades.
Jimmy K. Yu +4 more
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Azobenzene is one of the most ubiquitous photoswitches in photochemistry and a prototypical model for photoisomerizing systems. Despite this, its wavelength-dependent photochemistry has puzzled researchers for decades.
Jimmy K. Yu +4 more
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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,
Nicholas J. Turro +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,
Nicholas J. Turro +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 ...
O Anders, Borg +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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Photochemistry beyond the red limit in chlorophyll f–containing photosystems
Science, 2018Lower-energy photons do the work, too Plants and cyanobacteria use chlorophyll-rich photosystem complexes to convert light energy into chemical energy. Some organisms have developed adaptations to take advantage of longer-wavelength photons.
Dennis J. Nürnberg +11 more
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Science (New York, N.Y.), 1963
The study of photochemical reactions provides new information on the excited states of molecules.
Hammond, George S., Turro, Nicholas J.
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The study of photochemical reactions provides new information on the excited states of molecules.
Hammond, George S., Turro, Nicholas J.
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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.
G, OSTER, J S, BELLIN, B, HOLMSTROM
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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.
G, OSTER, J S, BELLIN, B, HOLMSTROM
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