山苍子油抗氧化性研究及其在冷却猪肉保鲜中的应用

目的]研究山苍子油的抗氧化性及其在冷却猪肉保鲜中的应用。方法]以新鲜的山苍子雌花为原料,通过水蒸汽蒸馏法提取山苍子雌花精油,同时以山苍子果实精油为试材,TBHQ和VC为对照,测定这2种山苍子油对自由基的清除能力以及对猪油的抗氧化效果,并将山苍子果实精油制成涂膜剂涂膜到冷却猪肉表面进行保鲜试验。结果]试验表明,山苍子果实精油和雌花精油均具有较好的抗氧化作用,能有效清除DPPH自由基、羟自由基和超氧自由基,但果实精油比雌花精油效果要好。此外,山苍子果实精油对冷却猪肉具有较好的保鲜效果,其最佳涂膜浓度为0.08%,保鲜时间可延长8 d左右。结论]研究可为山苍子资源的开发利用提供理论依据和技术途径。

Study on Antioxidant Activity of Litsea cubeba Oil and Its Application in Chilled Pork Preservation

Objective] To study the antioxidant activity of Litsea cubeba oil and its application in chilled pork preservation.Method] Essential oil of L.cubeba was extracted with water vapor distillation method from its fresh female flower and fruit and the antioxidant activity of the oils was evaluated both in vitro measurement and in preservation of chilled pork with coating agents made from the oils,by using TBHQ and VC as the control antioxidants.Result] The results showed that the fruit oil and the female flower oil of L.cubeba had relatively high antioxidant activities,they both were able to effectively scavenge DPPH,hydroxyl radical and superoxide anion radicals,and the antioxidant effect of fruit oil was superior to that of female flower oil;In addition,the fruit oil of L.cubeba demonstrated a better preservative effect than flower oil when they were used to coat the chilled pork,and the best coating concentration of fruit oil was determined to be 0.08%,at which the shelf life was prolonged by 8d or so.Conclusion] The study will provide theoretical basis and technique of development and utilization of L.cubeba.