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投稿时间:2022-05-09
投稿时间:2022-05-09
中文摘要: 研究光照、温度、氧化剂和还原剂对桑葚干和桑葚酒中花青素稳定性的影响,通过自由基清除试验评价桑葚干和桑葚酒的抗氧化能力,相关性分析讨论表征桑葚花青素稳定性的指标,比较桑葚花青素在不同产品中的稳定性。结果表明,桑葚酒中花青素对光照、温度、氧化剂、还原剂的耐受性显著强于桑葚干。桑葚酒提取物清除DPPH和ABTS+自由基的半数抑制率浓度均为3.05 mg/mL,对应的桑葚干提取物为3.93 mg/mL和3.55 mg/mL。相关性分析结果表明,光照、温度和H2O2对花青素的稳定性、花青素清除DPPH、ABTS+自由基能力与聚合型花青素占比成显著的正相关关系(p<0.05)。表征花青素的稳定性指标可能是聚合型花青素所占比重,桑葚酒中花青素的稳定性强于桑葚干,更耐受复杂的外界环境变化。
Abstract:The effects of light,temperature,oxidants,and reductants on the stability of anthocyanins in dried mulberry and mulberry wine were analyzed.Additionally,the antioxidant potency of dried mulberry and mulberry wine were assessed by radical scavenging experiment and a correlation analysis was analyzed to discuss the indices characterizing the stability of mulberry anthocyanins in different products.The results showed that the tolerance of anthocyanins to light,temperature,oxidants,and reductants was significantly stronger in mulberry wine than in dried mulberry.The half inhibitory concentration to scavenge DPPH and ABTS+free radicals in mulberry wine extract was 3.05 mg/mL,while it was 3.93 mg/mL and 3.55 mg/mL,respectively,in the corresponding dry mulberry extract.Correlation analysis results showed that the stability of anthocyanins in the presence of different light,temperature,and H2O2conditions,and their ability to scavenge DPPH and ABTS+free radicals significantly positively correlated with the proportion of polymeric anthocyanins(p<0.05).The stability index of anthocyanins may indicate the proportion of polymeric anthocyanins.Furthermore,anthocyanins in mulberry wine were more stable and tolerant to complex external environmental changes than those in dry mulberry.
keywords: antioxidant polymerized anthocyanins nucleophilic reaction free radicals correlation analysis
文章编号:202224008 中图分类号: 文献标志码:
基金项目:湖北省科技创新专项重大项目(2016ABA106)
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