Determinations antioxidants

BORS w, HELLER w, MICHEL c and SARAN M (1990) Flavouoids as antioxidants determination of radical-scavenging efficiency Methods in Enzymology 186, 343-55. [Pg.15]

The solubility of antioxidants determines their phase distribution in foods. It has been observed that compared to lipid-soluble antioxidants water-soluble antioxidants like ascorbate yield better protection to strongly lipophilic food systems like pure oils. In contrast, antioxidants soluble in lipids like the tocopherols yield better protection to oil-in-water emulsions when compared to water-soluble antioxidants (Porter, 1993). The explanation offered for this... [Pg.326]

FOTi M and RUBERTO G (2001) Kinetic solvent effects on phenolic antioxidants determined by spectrophosometric measiuements, JAgric Food Chem, 49, 342-8. [Pg.341]

Bors, W. et al., Elavonoids as antioxidants determination of radical scavenging efficiencies,... [Pg.432]

Bors W, Heller W, Michel C, Saran M. 1990. Flavonoids as antioxidants Determination of radical-scavenging efficiencies. Methods Enzymol 186 343-355. [Pg.104]

Bokkenheuse VD, Shacketon CHL, Winter J. 1987. Hydrolysis of dietaryflavonoide glycosides by strains of intestinal bacteroides from humans. Biochem J 248 953-956. Bors W, Heller W, Michel C, Saran M. 1990. Flavonoids as antioxidants Determination of radical-scavenging efficiencies. In Packer L, Glazer AN, Eds. Methods in Enzymology 186, San Diego Academic Press, pp. 343-355. [Pg.193]

Glutathione is the main low-molecular-weight antioxidant determining TAC of homogenates of several rat tissues, uric acid being important only in the liver. The low-molecular-weight antioxidants (mainly glutathione, urate, ascorbate, and... [Pg.240]

Voltammetry. The voltammetric techniques are based on the current-voltagetime relationship at microelectrodes. To perform voltammetry, the oil/antioxidant sample is dissolved in a solvent containing an electrolyte and a three-electrode system (glassy carbon working electrode, a platinum wire reference electrode, and platinum wire auxiliary electrode) is inserted into an oil/solvent solution. A fresh oil typical of the application (100% standard) and the solvent system (0 % standard) is used to calibrate the voltammetric instrument for % remaining antioxidant determination (Kauffman, 1989 and 1991). [Pg.229]

Typical standard deviations for determinations of the sum of phenolic antioxidants determined using HPLC/UV-vis were 0.015 mmol/L for red wines, 0.004 mmol/L for rose and 0.050 mmol/L for white wines. [Pg.360]

Bors, W., Heller, W., Michel, C. Saran, M. (1990). Flavonoids as antioxidants determination of radical-scavenging efficiencies. Methods in Enzymology, 186, 343-355. [Pg.279]

J. R. Medina Lopez, G. Alarcon Angeles, and A. Morales Perez. 2011. Adaptation of DPPH method for antioxidant determination. ECS Transactions 36(1) 401-411. [Pg.575]

FIGURE 33.1 Schematic representation of the 96-well microplate distribution of experiments for antioxidant determination AO to AO5, correspond to increasing concentrations of antioxidant standard solutions, each analyzed in quadruplicate Sj to Sig, correspond to different sample solutions, each analyzed in quadruplicate. The different modes of measurement mostly used in antioxidant assays, including the absorbance, fluorescence, and chemiluminescence, are represented at the bottom. [Pg.641]

Blois, M.S. 1958. Antioxidant determination by the use of a stable free radical. Nature. 181 1199-1202. [Pg.297]

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See also in sourсe #XX -- [ Pg.607 , Pg.608 , Pg.609 ]

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