Scavenging capacity

Besides all the sensory and texturizing properties, GA has interesting antioxidant properties such as an efficient capacity for deactivation of excited electronic states and moderated radical scavenging capacity. There is increasing experimental evidence that associate the antioxidant function with its protein fraction, mainly by amino acid residues such as histidine, tyrosine and lysine, which are generally considered as antioxidants molecules (Marcuse, 1960,1962 Park et al., 2005). 

Mercadante, A.Z. Alvarez, R.M.S. Borsarelli, G.D. (2009). Singlet oxygen quenching and radical scavenging capacities of structurally related flavonoids present in Zuccagnia punctata Gav. Free Radical Research, Vol.43, No.6, (January 2009), pp. 553-564, ISSN 1071-5762... 

ANCos B DE, GONZALES E M and CANO M p (2000) Ellagic acid, vitamin C, and total phenolic contents and radical scavenging capacity affected by freezing and frozen storage in raspberry fruit , J Agric Food Chem, 48 (10) 4565-70. 

ESPIN J c, soLER-RivAS c and WICKERS H J (2000) Characterization of total free radical scavenger capacity of vegetable oils and oil fractions using 2,2-diphenyl-1 -picryUiydrazyl radical, JAgric Food Chem, 48, 648-56. 

LARRAURi J A, SANCHEZ-MORENO c, RUPEREZ p and SAURA-CALIXTO F (1999) Free radical scavenging capacity in the aging of selected red Spanish wines, JAgric Food Chem, 47, 1603-6. 

Lichtenthaler, R. et al.. Total oxidant scavenging capacities of Euterpe oleracea Mart. (a9ai) fruits, Int. J. Food Sci. Nutr, 56, 53, 2005. 

Reduced scavenger capacity is deduced from studies demonstrating low plasma and cellular levels of antioxidants such as glutathione, vitamin E, thiols, magnesium and ascorbic acid, as well as reduced levels of scavenger enzymes such as neutrophil glutathione peroxidase and red cell superoxide dismutase (Lyons, 1991 Sinclair /., 1992). 

Wang S Y and Jiao HJ. 2000. Scavenging capacity of berry crops on superoxide radicals, hydrogen peroxide, hydroxyl radicals, and singlet oxygen. J Agric Food Chem 48 5677-5684. 

Liu D, Shi J, Ibarra AC, Kakuda Y and Xue SJ. 2008. The scavenging capacity and synergistic effects of lycopene, vitamin E, vitamin C, and (1-carotene mixtures on the DPPH free radical. Food Sci Technol 41 1344-1349. 

Peroxynitrite (ONOO-) is a cytotoxic reactive species that is formed by the reaction of nitric oxide and superoxide. Methods for measuring the scavenging capacity of peroxynitrite usually depend on either the inhibition of tyrosine nitration or the inhibition of dihydrorhodamine 123 (DHR) oxidation to rhodamine 123 (MacDonalds-Wicks and... 

TOSC Assay (Total Oxyradical Scavenging Capacity)... 

Chanjirakul K, Wang SY, Wang CY and Siriphanich J. 2007. Natural volatile treatments increase free-radical scavenging capacity of strawberries and blackberries. J Sci Food Agric 87(8) 1463-1472. 

Choi CW, Kim SC, Hwang SS, Choi BK, Ahn HJ, Lee MY, Park SH and Kim SK. 2002. Antioxidant activity and free radical scavenging capacity between Korean medicinal plants and flavonoids by assay-guided comparison. Plant Sci 163(6) 1161-1168. 

Kohen R, Vellaichamy E, Hrbac J, Gati I and Tirosh O. 2000. Quantification of the overall reactive oxygen species scavenging capacity of biological fluids and tissues. Free Radic Biol Med 28(6) 871—879. 

Lichtenthaler R and Marx F. 2005. Total oxidant scavenging capacities of common European fruit and vegetable juices. J Agric Food Chem 53(1) 103—110. 

MacLean DD, Murr DP and DeEll JR. 2003. A modified total oxyradical scavenging capacity assay for antioxidants in plant tissues. Potharv Biol Technol 29(2) 183-194. 

Sanchez-Moreno C, Larrauri JA and Saura-Calixto F. 1999b. Free radical scavenging capacity and inhibition of lipid oxidation of wines, grape juices and related polyphenolic constituents. Food Res Int 32(6) 407—412. 

Sanchez-Moreno C, Larrauri, JA and Saura-Calixto L. 1999a. Lree radical scavenging capacity of selected red, rose and white wines. J Sci Food Agric 79(10) 1301—1304. 

Solerrivias C, Espin JC and Wickers HJ. 2000. An easy and fast test to compare total free-radical scavenger capacity of foodstuffs. Phytochem Anal 11 330—338. 

Wang SY and Ballington JR. 2007. Free radical scavenging capacity and antioxidant enzyme activity in deerberry (Vaccinium stamineum L.). LWT Food Sci Technol 40(8) 1352—1361. 

Winston GW, Regoli F, Dugas JR, Fong JH and Blanchard KA. 1998. A rapid gas chromatographic assay for determining oxyradical scavenging capacity of antioxidants and biological fluids. Free Radic Biol Med 24(3) 480 193. 

Ricardo DS, Darmon N, Eemandez Y et al (1991) Oxygen free radical scavenger capacity in aqueous models of different procyanidins from grape seeds. 1 Agric Pood Chem 39 1549-1552... 

Figure 6 Effect of scavenging capacity for e q on the number of electrons scavenged in aqueous solutions of nitrous oxide, nitrate, and selenate. Experimental data nitrate—( ) [77], ( ) [78] ...

Figure 9 Effect of radiation type and of scavenging capacity for Caq on the yield of NH3 and N2 from glycyl-glycine and N2O solutions, respectively.

Table 5.6 shows the total phenolic content (determined using the Folin-Ciocalteu assay) and antioxidant activity (ABTS radical scavenging capacity) of extracts from morama bean seed coat and cotyledon prepared with acidified mefhanol. If is clear fhaf morama bean seed coat and cotyledon have appreciable levels of fofal phenolics and antioxidant activity. These phenolics are concentrated in the seed coat. It has been reported that the morama bean cotyledon contains high levels of the amino acid tyrosine (Maruatona et ah, 2010) which is phenolic in nature and can therefore confribufe fo fhe fofal phenolic content of the cotyledon as determined with the Folin-Ciocalteu assay. 

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