Centre for Drug Research, Universiti Sains Malaysia, Penang, 11800 Malaysia.
J Food Sci Technol. 2012 Aug;49(4):510-4. doi: 10.1007/s13197-011-0435-8. Epub 2011 Jun 25.
The present study was conducted to examine the effects of sonication treatments (time intervals of 0, 15, 30, 45 and 60 min.) on phenolics and other antioxidant compounds in starfruits extracted in methanol and water. Overall, methanolic extracts exhibited significantly higher extractability, percentage inhibition of DPPH radicals, ferric reducing antioxidant property (FRAP) value, antioxidant capacity, flavonoids, total phenolics and tannins (p < 0.05) compared to control (0 min) and aqueous extracts. Methanolic extract obtained after 30 min of sonication proved to be the best treatment with regard to various parameters evaluated. Results of the present study clearly indicated sonication treatments to be effective in enhancing the antioxidant compounds in starfruit extracts and could be further explored for commercial purposes to benefit the consumers.
本研究旨在考察超声处理(0、15、30、45 和 60 分钟的时间间隔)对甲醇和水中提取的杨桃中酚类和其他抗氧化化合物的影响。总体而言,与对照(0 分钟)和水提物相比,甲醇提取物在提取率、对 DPPH 自由基的抑制百分比、铁还原抗氧化能力(FRAP)值、抗氧化能力、类黄酮、总酚和单宁方面表现出更高的提取率(p < 0.05)。超声处理 30 分钟后获得的甲醇提取物在各种评估参数方面被证明是最佳处理方法。本研究结果清楚地表明,超声处理可有效提高杨桃提取物中的抗氧化化合物,可进一步探索用于商业目的,使消费者受益。