Antioxidant activity of Allium tuberosum Rottl. ex Spreng under different extraction methods

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2015-11
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eng
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application/pdf
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9 pages
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The 27th Annual Meeting of the Thai Society for Biotechnology and International Conference
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The Bang-Phae organic vegetable grower community enterprise group, Ratchaburi province is one of the big Chinese chives (Allium tuberosum Rottl. ex Spreng) grower in Thailand. However, some Chinese chives did not meet standard and were sorted out. The Chinese chives essential oil, which contains many new and known bioactive compounds, is valued product from sorted out Chinese chives. Therefore, this experiment was aimed to study the antioxidant activity of Chinese chive extracts using 17 different extraction conditions (Steam distillation for 1.0, 2.0, 2.5, 3.0 hour; Ohmic pretreatment with steam distillation for 1.0, 2.0, 2.5, 3.0 hour; 95% ethanol, hexane, oil extract using dry, fresh, freeze Chinese chives). The ferric reducing antioxidant potential assay was used to evaluate antioxidant activity of Chinese chive extracts. The results showed that the highest antioxidant activity was 1.756 ± 0.008 µmol Fe2+/ mg sample of freeze Chinese chives extracted with hexane. The antioxidant activity was vary from 0.098 ± 0.005 - 1.756 ± 0.008 µmol Fe2+/ mg sample depend on the extraction condition.
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