Results 231 to 240 of about 57,845 (293)
Shining light on the mechanism of photochemical alkene formation in vitamin B<sub>12</sub>. [PDF]
Chem SciMukherjee A +6 more
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The Journal of Organic Chemistry, 2006
Photolysis of heptanal is investigated from an experimental and theoretical point of view. Photoexcited heptanal is believed to undergo rapid intersystem crossing to the triplet manifold and from there undergoes internal H-abstraction to form biradical intermediates.
Suzanne E, Paulson +4 more
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Photolysis of heptanal is investigated from an experimental and theoretical point of view. Photoexcited heptanal is believed to undergo rapid intersystem crossing to the triplet manifold and from there undergoes internal H-abstraction to form biradical intermediates.
Suzanne E, Paulson +4 more
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Rubber Chemistry and Technology, 1947
Abstract Rubber hydrocarbon irradiated in vacuo is decomposed by ultraviolet light of wave length less than 4000 A˚. The rubber very rapidly becomes insoluble, and liberates a gaseous mixture which consists mainly of hydrogen when the irradiation temperature is less than 150° C.
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Abstract Rubber hydrocarbon irradiated in vacuo is decomposed by ultraviolet light of wave length less than 4000 A˚. The rubber very rapidly becomes insoluble, and liberates a gaseous mixture which consists mainly of hydrogen when the irradiation temperature is less than 150° C.
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International Journal of Radiation Biology and Related Studies in Physics, Chemistry and Medicine, 1976
The photoionization of aromatic residues constitutes a major initial photochemical reaction in the flash photolysis of proteins at gamma greater than 250 nm. The ejected electrons have been observed as eaq- and the disulphide bridge electron adduct, and also must be trapped at unidentified sites.
L I, Grossweiner +2 more
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The photoionization of aromatic residues constitutes a major initial photochemical reaction in the flash photolysis of proteins at gamma greater than 250 nm. The ejected electrons have been observed as eaq- and the disulphide bridge electron adduct, and also must be trapped at unidentified sites.
L I, Grossweiner +2 more
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FLASH PHOTOLYSIS OF RIBONUCLEASE A
Photochemistry and Photobiology, 1973Abstract— Flash photolysis spectra show that ultraviolet irradiation of RNase (Λ > 250 nm) at pH 11.5 generates the hydrated electron and a long‐lived transient with absorption maxima at 390 nm and 410 nm, attributed to the phenoxyl type radical from tyrosyl residues.
W A, Volkert, L I, Grossweiner
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Nature, 1965
IT is well known that ultra-violet irradiation of proteins can cause changes of physiological importance but, despite the increasing number of publications on aspects of this problem, little is known of the primary processes which must precede or accompany the destruction of the macromolecule.
R B, Johns, T, Jaskewycz
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IT is well known that ultra-violet irradiation of proteins can cause changes of physiological importance but, despite the increasing number of publications on aspects of this problem, little is known of the primary processes which must precede or accompany the destruction of the macromolecule.
R B, Johns, T, Jaskewycz
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Journal of the American Pharmaceutical Association (Scientific ed.), 1956
Abstract The rate of destruction of crystalline vitamin Bu in neutral aqueous solutions, when exposed to direct sunlight, indirect sunlight, dim daylight, artificial light, ultraviolet light, and various monochromatic light sources has been determined.
L J, DEMERRE, C, WILSON
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Abstract The rate of destruction of crystalline vitamin Bu in neutral aqueous solutions, when exposed to direct sunlight, indirect sunlight, dim daylight, artificial light, ultraviolet light, and various monochromatic light sources has been determined.
L J, DEMERRE, C, WILSON
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