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Int. J. Mol. Sci. 2012, 13(7), 8789-8804; doi:10.3390/ijms13078789
Article

Extraction of Dihydroquercetin from Larix gmelinii with Ultrasound-Assisted and Microwave-Assisted Alternant Digestion

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Received: 30 May 2012; in revised form: 1 July 2012 / Accepted: 3 July 2012 / Published: 16 July 2012
(This article belongs to the Section Bioactives and Nutraceuticals)
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Abstract: An ultrasound and microwave assisted alternant extraction method (UMAE) was applied for extracting dihydroquercetin (DHQ) from Larix gmelinii wood. This investigation was conducted using 60% ethanol as solvent, 1:12 solid to liquid ratio, and 3 h soaking time. The optimum treatment time was ultrasound 40 min, microwave 20 min, respectively, and the extraction was performed once. Under the optimized conditions, satisfactory extraction yield of the target analyte was obtained. Relative to ultrasound-assisted or microwave-assisted method, the proposed approach provides higher extraction yield. The effect of DHQ of different concentrations and synthetic antioxidants on oxidative stability in soy bean oil stored for 20 days at different temperatures (25 °C and 60 °C) was compared. DHQ was more effective in restraining soy bean oil oxidation, and a dose-response relationship was observed. The antioxidant activity of DHQ was a little stronger than that of BHA and BHT. Soy bean oil supplemented with 0.08 mg/g DHQ exhibited favorable antioxidant effects and is preferable for effectively avoiding oxidation. The L. gmelinii wood samples before and after extraction were characterized by scanning electron microscopy. The results showed that the UMAE method is a simple and efficient technique for sample preparation.
Keywords: Larix gmelinii wood; dihydroquercetin; ultrasound and microwave assisted alternant extraction; peroxide value; scanning electronic microscope Larix gmelinii wood; dihydroquercetin; ultrasound and microwave assisted alternant extraction; peroxide value; scanning electronic microscope
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Ma, C.; Yang, L.; Wang, W.; Yang, F.; Zhao, C.; Zu, Y. Extraction of Dihydroquercetin from Larix gmelinii with Ultrasound-Assisted and Microwave-Assisted Alternant Digestion. Int. J. Mol. Sci. 2012, 13, 8789-8804.

AMA Style

Ma C, Yang L, Wang W, Yang F, Zhao C, Zu Y. Extraction of Dihydroquercetin from Larix gmelinii with Ultrasound-Assisted and Microwave-Assisted Alternant Digestion. International Journal of Molecular Sciences. 2012; 13(7):8789-8804.

Chicago/Turabian Style

Ma, Chunhui; Yang, Lei; Wang, Wenjie; Yang, Fengjian; Zhao, Chunjian; Zu, Yuangang. 2012. "Extraction of Dihydroquercetin from Larix gmelinii with Ultrasound-Assisted and Microwave-Assisted Alternant Digestion." Int. J. Mol. Sci. 13, no. 7: 8789-8804.



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