Results 221 to 230 of about 62,736 (263)
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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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Advances in singlet oxygen chemistry
Tetrahedron, 2005AbstractFor Abstract see ChemInform Abstract in Full Text.
CLENNAN, EL, PACE, Andrea
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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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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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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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Singlet oxygen and biological systems
Chemico-Biological Interactions, 1971Abstract Singlet oxygen is receiving increasing attention as a reactive species in many chemical and biological systems. It can be generated easily by microwave discharge, chemically or by photosensitized irradiation and also is found to be a common reactive atmospheric pollutant generated by solar radiation.
I R, Politzer +2 more
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Intramolecular Transfer of Singlet Oxygen
Journal of the American Chemical Society, 2015The intramolecular transfer of energy (FRET) and electrons (Dexter) are of great interest for the scientific community and are well-understood. In contrast, the intramolecular transfer of singlet oxygen ((1)O2), a reactive and short-lived oxygen species, has until now been unknown. This process would be very interesting because (1)O2 plays an important
Klaper, Matthias +1 more
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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 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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Ene‐Reactions with Singlet Oxygen
ChemInform, 2003AbstractFor Abstract see ChemInform Abstract in Full Text.
Oliver Krebs +3 more
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