【摘要】 在推动循环经济的进程中，该研究着重于大果沙枣叶多酚的提取及其应用潜力。利用超声波辅助提取技术对大果沙枣叶中的多酚类化合物进行了提取工艺的优化，并对其抗氧化和抗糖化能力进行了全面评估。试验确定了最佳提取条件为超声时间20.00 min、料液比1∶53.40 （g/mL）、超声温度69.70℃、超声功率400 W,此条件下得到多酚提取量为（28.24±0.46） mg/g。抗氧化试验表明，该多酚对DPPH·、·OH和ABTS⁺·具有较强清除能力，其IC₅₀值分别为0.112, 0.110, 0.146 mg/mL。在BSA-GLC模拟反应体系下，其糖化抑制率显著提高至（44.64±7.20）%。研究结果表明，超声辅助提取的大果沙枣叶多酚具有显著的体外抗氧化和抗糖化能力，其能力随着大果沙枣叶多酚浓度的增加而增强，表明其可作为潜在的天然食品添加剂，为沙枣副产品的综合利用提供了新方向。更多还原

【Abstract】 In the process of promoting circular economy, the extraction of polyphenols from Elaeagnus moorcroftii Wall. leaves and their application potential are focused on in this study. The extraction process of polyphenols from the leaves of Elaeagnus moorcroftii Wall. is optimized by ultrasonic-assisted extraction technology, and their antioxidant and anti-glycation abilities are evaluated comprehensively. The optimal extraction conditions are determined as ultrasonic time of 20.00 min, solid-liquid ratio of 1∶53.40（g/mL）, ultrasonic temperature of 69.70 ℃, ultrasonic power of 400 W. Under such conditions, the extraction amount of polyphenols is（28.24±0.46） mg/g. Antioxidant tests show that the polyphenols have stronger scavenging abilities on DPPH·, ·OH and ABTS⁺·, and their IC₅₀ values are 0.112, 0.110, 0.146 mg/mL respectively. Under the BSA-GLC simulated reaction system, the inhibition rate of glycosylation significantly increases to（44.64±7.20）%. The research results show that the polyphenols extracted by ultrasonic-assisted extraction technology have significant antioxidant and anti-glycation abilities in vitro, and their abilities increase with the increase of concentration of polyphenols from Elaeagnus moorcroftii Wall. leaves, which indicates that they could be used as potential natural food additives, and has provided a new direction for the comprehensive utilization of by-products of Elaeagnus moorcroftii Wall..更多还原