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Cvetković D, Marković D. Lycopene control of benzophenone-sensitized lipid peroxidation. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2012. [DOI: 10.1134/s0036024412050093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Cvetković D, Marković D. Beta-carotene suppression of benzophenone-sensitized lipid peroxidation in hexane through additional chain-breaking activities. Radiat Phys Chem Oxf Engl 1993 2011. [DOI: 10.1016/j.radphyschem.2010.08.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Effects of continuous UV-irradiation on the antioxidant activities of quercetin and rutin in solution in the presence of lecithin as the protective target. JOURNAL OF THE SERBIAN CHEMICAL SOCIETY 2011. [DOI: 10.2298/jsc101123089c] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The stabilities and antioxidant action of two selected flavonoids, quercetin
and rutin, dissolved in methanol and water, toward continuous UV-irradiation
from three different sub-ranges (UV-A, UV-B and UV-C) were studied. The
flavonoids underwent degradation (bleaching) following first-order kinetics.
The bleaching rates were highly dependent on the energy input of the involved
UV-photons. The antioxidant activities of the two flavonoids on UV-induced
lecithin lipid peroxidation were studied by the TBA-MDA test, and appeared to
be also affected by the continuous UV irradiation. The energy input of the
incident UV-photons again played a major governing role, but an impact of the
flavonoids structures cannot be neglected.
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UV-effects on antioxidant activity of selected carotenoids in the presence of lecithin estimated by DPPH test. JOURNAL OF THE SERBIAN CHEMICAL SOCIETY 2008. [DOI: 10.2298/jsc0811051c] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The effects of ultraviolet radiation (UV) on the antioxidant action of three selected carotenoids (?-carotene, lycopene and lutein) in the presence of a lipoidal lecithin mixture were studied by the DPPH (1,1-diphenyl-2-picrylhydrazyl) test. The test is based on the measurement of the decrease of the free DPPH radical absorbance at 517 nm caused by the antioxidant action of carotenoids, which appeared to be strongly affected by UV-action. The high-energy input of the involved UV-photons plays a major governing role.
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