Results 261 to 270 of about 75,034 (299)
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DITHIOPHENES AS SINGLET OXYGEN SENSITIZERS
Photochemistry and Photobiology, 1982Abstract— The nematicidal compounds, 5‐methyl‐2,2′dithienyl, 5‐phenyl‐2,2′‐dithienyl and 5,5′‐dichloro‐2,2′‐dithienyl, generate singlet oxygen upon photoactivation with near‐UV light. Two chloro‐substituted dithienylethenes have similar properties that are farless efficient.
Gommers, F.J., Bakker, J., Wynberg, H.
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Singlet Oxygen and Aging in Drosophila
Gerontology, 2009There was little or no improvement in the median survival times of Drosophila melanogaster fruit flies when fed high concentrations of the singlet oxygen quenchers, β-carotene and l,4-diazabicyclo(2.2.2)octane. Singlet oxygen was presumably generated endogenously by inactivating catalase with 3-amino-1,2,4-triazole and feeding NaOCl.
H R, Massie, T R, Williams
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A singlet oxygen approach to oxaspirocycles
Tetrahedron Letters, 2013Abstract A method for the preparation of oxygen containing spirocycles using singlet oxygen is reported. A series of phenols were converted into the corresponding peroxy-cyclohexadienone derivatives by irradiation with visible light in the presence of a sensitizer and oxygen.
Jones, K. +2 more
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The singlet oxygen and carotenoid interaction
Journal of Photochemistry and Photobiology B: Biology, 1991Second-order rate constants kQ for the quenching of O2(1 delta g) by carotenoids were determined at room temperature in benzene and toluene using the technique of time-resolved luminescence. Of the C40 pigments studied, lycopene was found to be the most efficient quencher, but the increased efficiency compared with all-trans beta-carotene was less than
P F, Conn, W, Schalch, T G, Truscott
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Singlet Oxygen in DNA Nanotechnology
Accounts of Chemical Research, 2014CONSPECTUS: Singlet oxygen ((1)O2), the first excited electronic state of molecular oxygen, is a significant molecule, despite its minute size. For more than half a century, the molecule has been widely used and studied in organic synthesis, due to its characteristic oxygenation reactions. Furthermore, (1)O2 plays a key role in mechanisms of cell death,
Tørring, Thomas; id_orcid 0000-0001-5257-2121 +3 more
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Photogeneration of singlet oxygen by psoralens
Bulletin of Experimental Biology and Medicine, 1983Photosensitized luminescence of singlet (1 delta g) molecular oxygen with the maximum at 1272 nm has been found in solutions of psoralen, angelicin and 8-methoxypsoralen in CCl4. The luminescence excitation spectra, quantum yields of generation (gamma g) and rate constants of quenching (Kq) of 1 delta g by psoralens have been measured.
A A, Krasnovskiĭ +2 more
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Singlet Oxygen Stress in Microorganisms
2011Singlet oxygen is the primary agent of photooxidative stress in microorganisms. In photosynthetic microorganisms, sensitized generation by pigments of the photosystems is the main source of singlet oxygen and, in nonphotosynthetic microorganisms, cellular cofactors such as flavins, rhodopsins, quinones, and porphyrins serve as photosensitizer.
J, Glaeser +3 more
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Reaction of phenol with singlet oxygen
Physical Chemistry Chemical Physics, 2019Photo-degradation of organic pollutants plays an important role in their removal from the environment.
Jomana Al-Nu’airat +7 more
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Ene‐Reactions with Singlet Oxygen
ChemInform, 2003AbstractFor Abstract see ChemInform Abstract in Full Text.
Oliver Krebs +3 more
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Cytogenetic effects of singlet oxygen
Journal of Photochemistry and Photobiology B: Biology, 1992Singlet oxygen was generated in the gas phase at atmospheric pressure by the method of heterogeneous photosensitization. In vitro exposure of human lung WI-38 fibroblasts to gas-phase singlet oxygen resulted in sister chromatid exchange.
W C, Eisenberg, K, Taylor, R R, Guerrero
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