Chemical property of honey from Echium vulgare was investigated. In comparison with other honey species, the con-tents of total phenolic compounds and total flavonoids were the highest. α-Amylase activity was also ex...Chemical property of honey from Echium vulgare was investigated. In comparison with other honey species, the con-tents of total phenolic compounds and total flavonoids were the highest. α-Amylase activity was also extremely high: about three to nine hundred times as much as those of other honey species. The antioxidative activity of honey was investigated using four different methods. Honey from E. vulgare showed the best performance in inhibiting lipid peroxidation and scavenging superoxide anion radicals, hydroxyl radicals, and DPPH radicals. Moreover, it exhibited stronger inhibition activity of ACE. It is known that higher antioxidative activity and scavenging activity against active oxygen species in honey species related to their colour. In the present study, however, it suggests that the phenolics in honey from E. vulgare with yellow gold colour might be the major active component responsible for the strong antioxidative activity and radical scavenging activity.展开更多
本试验研究了超声辅助提取佛手瓜中总黄酮的工艺。在单因素试验基础上,考察乙醇浓度、超声温度、液料比和超声时间对佛手瓜总黄酮提取率的影响。根据Box-Benhnken中心组合试验设计原理,采用响应面法对佛手瓜总黄酮提取的关键参数进行了...本试验研究了超声辅助提取佛手瓜中总黄酮的工艺。在单因素试验基础上,考察乙醇浓度、超声温度、液料比和超声时间对佛手瓜总黄酮提取率的影响。根据Box-Benhnken中心组合试验设计原理,采用响应面法对佛手瓜总黄酮提取的关键参数进行了优化,建立了佛手瓜总黄酮提取率的数学模型。结果表明:4个因素对佛手瓜总黄酮提取率影响的大小顺序是超声温度>超声时间>液料比>乙醇浓度。佛手瓜总黄酮的最佳提取工艺条件为:乙醇浓度69%、超声温度71℃、液料比25 m L/g、超声时间31 min,在此条件下总黄酮提取率为3.402%,与理论预测值相对误差为0.526%。与传统热水浸提法相比,提取率提高了12.69%。展开更多
文摘Chemical property of honey from Echium vulgare was investigated. In comparison with other honey species, the con-tents of total phenolic compounds and total flavonoids were the highest. α-Amylase activity was also extremely high: about three to nine hundred times as much as those of other honey species. The antioxidative activity of honey was investigated using four different methods. Honey from E. vulgare showed the best performance in inhibiting lipid peroxidation and scavenging superoxide anion radicals, hydroxyl radicals, and DPPH radicals. Moreover, it exhibited stronger inhibition activity of ACE. It is known that higher antioxidative activity and scavenging activity against active oxygen species in honey species related to their colour. In the present study, however, it suggests that the phenolics in honey from E. vulgare with yellow gold colour might be the major active component responsible for the strong antioxidative activity and radical scavenging activity.
文摘本试验研究了超声辅助提取佛手瓜中总黄酮的工艺。在单因素试验基础上,考察乙醇浓度、超声温度、液料比和超声时间对佛手瓜总黄酮提取率的影响。根据Box-Benhnken中心组合试验设计原理,采用响应面法对佛手瓜总黄酮提取的关键参数进行了优化,建立了佛手瓜总黄酮提取率的数学模型。结果表明:4个因素对佛手瓜总黄酮提取率影响的大小顺序是超声温度>超声时间>液料比>乙醇浓度。佛手瓜总黄酮的最佳提取工艺条件为:乙醇浓度69%、超声温度71℃、液料比25 m L/g、超声时间31 min,在此条件下总黄酮提取率为3.402%,与理论预测值相对误差为0.526%。与传统热水浸提法相比,提取率提高了12.69%。
