2.6. Hydroxyl radical scavenging activity
The hydroxyl radical scavenging activity was determined
according to the method of Klein, Cohen, and Cederbaum
(1991). Various concentrations (50, 100 and 200 ppm) of
conserves in ethanol were placed in different test tubes
and evaporated. One ml of iron–EDTA solution (0.13%
ferrous ammonium sulfate and 0.26% EDTA), 0.5 ml of
EDTA (0.018%), and 1 ml of DMSO (0.85% v/v in 0.1 M
phosphate buffer, pH 7.4) were added to these tubes and
the reaction was initiated by adding 0.5 ml of 0.22% ascorbic
acid. Test tubes were capped tightly and heated on a
water bath at 80–90 C for 15 min. The reaction was terminated
by the addition of ice-cold trichloroacetic acid
(17.5% w/v)
2.6. Hydroxyl radical scavenging activityThe hydroxyl radical scavenging activity was determinedaccording to the method of Klein, Cohen, and Cederbaum(1991). Various concentrations (50, 100 and 200 ppm) ofconserves in ethanol were placed in different test tubesand evaporated. One ml of iron–EDTA solution (0.13%ferrous ammonium sulfate and 0.26% EDTA), 0.5 ml ofEDTA (0.018%), and 1 ml of DMSO (0.85% v/v in 0.1 Mphosphate buffer, pH 7.4) were added to these tubes andthe reaction was initiated by adding 0.5 ml of 0.22% ascorbicacid. Test tubes were capped tightly and heated on awater bath at 80–90 C for 15 min. The reaction was terminatedby the addition of ice-cold trichloroacetic acid(17.5% w/v)
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