Results 291 to 300 of about 121,504 (326)
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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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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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Aqueous Photolysis of Niclosamide
Journal of Agricultural and Food Chemistry, 2004The photodegradation of [(14)C]niclosamide was studied in sterile, pH 5, 7, and 9 buffered aqueous solutions under artificial sunlight at 25.0 +/- 1.0 degrees C. Photolysis in pH 5 buffer is 4.3 times faster than in pH 9 buffer and 1.5 times faster than in pH 7 buffer. In the dark controls, niclosamide degraded only in the pH 5 buffer.
Phillip W, Graebing +3 more
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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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Science, 1970
Photolysis of mixtures of certain alkyl halides and aromatic amines produces dehalogenation of the halide. These reactions involve a photoinduced charge transfer from the amine to the halide. Photolysis of tritolylamine and carbon tetrachloride produces tritolylaminium chloride. Photolysis of 1,1,1-trichloro-2,2-bis( p
L L, Miller, R S, Narang
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Photolysis of mixtures of certain alkyl halides and aromatic amines produces dehalogenation of the halide. These reactions involve a photoinduced charge transfer from the amine to the halide. Photolysis of tritolylamine and carbon tetrachloride produces tritolylaminium chloride. Photolysis of 1,1,1-trichloro-2,2-bis( p
L L, Miller, R S, Narang
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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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PHOTOLYSIS OF POLYRIBOBROMOURIDYLIC ACID
Photochemistry and Photobiology, 1972Abstract—Photolysis of polyribobromouridylic acid with 313 nm light at neutral pH caused extensive debromination and a loss of A280(280–nm absorbance) without comparable increase in A260. At an exposure of 190μE/cm2, strand breakage occurred on the average of one break every 170 BrU residues. Little if any pyrimidine hydrate was produced.
M, Ehrlich, M, Riley
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TECHNIQUES OF FLASH PHOTOLYSIS*
Photochemistry and Photobiology, 1968Abstract— The design of a typical flash photolysis equipment is considered in detail and the factors limiting the time resolution and the sensitivity are analyzed. The characteristics of low pressure discharge lamps are compared with those of high pressure arcs, of exploding foils and of the electromagnetic ‘pinch’ discharge.
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