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The antioxidative effect of leaves of Cedrela sinensis on 0.1M-linoleic acid was compared with some commercial antioxidants during storage at 50$\pm$2$^{\circ}C$ for 20 hours, and on soybean oils at 60$\pm$2$^{\circ}C$ for 30days. In the oxidation of linol...

The antioxidative effect of leaves of Cedrela sinensis on 0.1M-linoleic acid was compared with some commercial antioxidants during storage at 50$\pm$2$^{\circ}C$ for 20 hours, and on soybean oils at 60$\pm$2$^{\circ}C$ for 30days. In the oxidation of linoleic acid, antioxidative effects of various leaves of Cedrela sinensis extracts and other antioxidants were shown in the following orders: 3% leave of Cedrela sinensis methanol extract＞1% leave of Cedrela sinensis methanol extract＞0.02% BHT＞3% leave of Cedrela sinensis ethyl acetate extract＞0.5% leave of Cedrela sinensis methanol extract＞0.02% tocopherol＞leave of Cedrela sinensis methanol extract 0.1, 0.02%＞leave of Cedrela sinensis ethyl acetate extract 1, 0.5, 0.1, 0.02%＞control, while in the oxidation of soybean oil, 1% leave of Cedrela sinengis methanol extract＞0.02% BHT＞3% leave of Cedrela sinengis methanol extract＞0.02% tocopherol＞control. The relative antioxidant effectiveness (RAE) were shown to be available in all substrates and the best effect was shown in substrate added compound of 3% leave of Cedrela sinensis methanol extract.

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