为了优化超声波辅助酶解制备花生蛋白抗菌肽工艺条件,以低温冷榨花生蛋白粉为原料,采用单因素试验和响应面Box-Benhnken试验设计方法,研究酶解得到的抗菌肽复合物对1,1-二苯基-2-三硝基苯肼(DPPH)自由基清除率和对大肠埃希氏菌抑菌圈大...为了优化超声波辅助酶解制备花生蛋白抗菌肽工艺条件,以低温冷榨花生蛋白粉为原料,采用单因素试验和响应面Box-Benhnken试验设计方法,研究酶解得到的抗菌肽复合物对1,1-二苯基-2-三硝基苯肼(DPPH)自由基清除率和对大肠埃希氏菌抑菌圈大小。结果表明,超声波辅助酶解制备花生蛋白抗菌肽复合物的最优工艺参数为底物浓度10%、初始pH值8.0、加酶量2.4 A·100 m L-1、超声波功率210 W、超声波频率45 k Hz、酶解温度47℃、酶解时间44 min;在此最佳工艺条件下,抗菌肽复合物对DPPH自由基清除率及大肠埃希氏菌的抑菌圈直径模型预测值分别为39.82%和1.77 cm,验证试验的DPPH自由基清除率(46.41%±2.10%)远大于模型预测值(39.82%),抑菌圈直径(1.70±0.04cm)与模型预测值(1.77 cm)相差不大。本研究结果为花生抗菌肽的分离、纯化、生物活性、构效关系及分子改造等方面的研究提供了理论依据。展开更多
The effects of rare earths (RE) and its complex with extract from seaweed (Lamiaria japonica) on the growth and immunization of penaeid shrimp (Penaeus vannamei) were investigated. The results show that the survival r...The effects of rare earths (RE) and its complex with extract from seaweed (Lamiaria japonica) on the growth and immunization of penaeid shrimp (Penaeus vannamei) were investigated. The results show that the survival rate, body length and weight of the shrimp treated by RE and its complex with extract from seaweed are higher than those of the control, and that the activities of the phenoloxidase (PO), lysozyme (LSZ), superoxide dismutase (SOD), peroxidase (POD), acid phosphatase (ACP) and alkaline phosphatase (ALP) in the shrimp treated by RE and the complex are also much higher than those from the control.展开更多
文摘为了优化超声波辅助酶解制备花生蛋白抗菌肽工艺条件,以低温冷榨花生蛋白粉为原料,采用单因素试验和响应面Box-Benhnken试验设计方法,研究酶解得到的抗菌肽复合物对1,1-二苯基-2-三硝基苯肼(DPPH)自由基清除率和对大肠埃希氏菌抑菌圈大小。结果表明,超声波辅助酶解制备花生蛋白抗菌肽复合物的最优工艺参数为底物浓度10%、初始pH值8.0、加酶量2.4 A·100 m L-1、超声波功率210 W、超声波频率45 k Hz、酶解温度47℃、酶解时间44 min;在此最佳工艺条件下,抗菌肽复合物对DPPH自由基清除率及大肠埃希氏菌的抑菌圈直径模型预测值分别为39.82%和1.77 cm,验证试验的DPPH自由基清除率(46.41%±2.10%)远大于模型预测值(39.82%),抑菌圈直径(1.70±0.04cm)与模型预测值(1.77 cm)相差不大。本研究结果为花生抗菌肽的分离、纯化、生物活性、构效关系及分子改造等方面的研究提供了理论依据。
基金Project supported by Qingdao Scientific Research Program (03 2 HH 3) and Shandong Scientific Foundation (2004ZRB01001)
文摘The effects of rare earths (RE) and its complex with extract from seaweed (Lamiaria japonica) on the growth and immunization of penaeid shrimp (Penaeus vannamei) were investigated. The results show that the survival rate, body length and weight of the shrimp treated by RE and its complex with extract from seaweed are higher than those of the control, and that the activities of the phenoloxidase (PO), lysozyme (LSZ), superoxide dismutase (SOD), peroxidase (POD), acid phosphatase (ACP) and alkaline phosphatase (ALP) in the shrimp treated by RE and the complex are also much higher than those from the control.
