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- W3092904029 abstract "The aim of this study was to evaluate the effectiveness of gamma radiation from {sup 60}Co at doses 0, 5, 10, 15 and 20 kGy on the antioxidant activity of Zingiberaceae plants. For this study were selected: turmeric (Curcuma longa L.), ginger (Zingiber officinale Roscoe) and zedoaria (Curcuma zedoaria (Christm.) Roscoe). The following methodologies applied were: quantification of phenolic compounds by Folin-Ciocalteu method and assessing the potential of antioxidant activity by the free radical [2,2 difenil-1-pricril-hidrazil (DPPH{center_dot})] scavenging and by Rancimat method in acetone:methanol extracts of selected vegetables. Regardless of the radiation dose applied there were no decrease of total phenolic compounds compared to the control, in any plant studied. The results did not show a decrease in the ability to scavenge free radicals in turmeric case and in the case of zedoaria it were decreased only in doses of 20 kGy. Non-irradiated ginger extract showed higher ability on scavenge. The analysis of the antioxidant potential by Rancimat method showed no significant difference in the antioxidant activity index (AAI) between doses applied in turmeric and ginger extracts. Already, zedoaria non-irradiated extract showed significantly higher AAI than those presented by irradiated ones. Major losses in the potential of antioxidant activity were found in doses of 20 kGy. It could be concluded that gamma radiation processing of Zingiberaceae plants in doses until 15 kGy may be a feasible alternative to industry, do not change the quantitative profile of phenolic compounds or decrease its expressive antioxidant potential. (author)" @default.
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- W3092904029 date "2011-07-01" @default.
- W3092904029 modified "2023-09-23" @default.
- W3092904029 title "Effect of the radiation processing on the antioxidant activity of zingiberaceae family plants" @default.
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