以墨红玫瑰花瓣为原料,采用纤维素酶或果胶酶处理墨红玫瑰花瓣,以还原糖含量为指标,通过单因素和响应面试验确定墨红玫瑰花瓣酶解过程中料液比、酶添加量和酶解时间的最佳条件。在此基础上,检测酶解提取对样品抗氧化、弹性蛋白酶抑制活...以墨红玫瑰花瓣为原料,采用纤维素酶或果胶酶处理墨红玫瑰花瓣,以还原糖含量为指标,通过单因素和响应面试验确定墨红玫瑰花瓣酶解过程中料液比、酶添加量和酶解时间的最佳条件。在此基础上,检测酶解提取对样品抗氧化、弹性蛋白酶抑制活性的影响。结果表明,纤维素酶酶解的最佳工艺条件如下:料液比1∶54.20(g/mL),纤维素酶添加量4.00%,提取时间3 h 49 min,所得提取物中还原糖含量达到139.07±1.32 mg/g。果胶酶酶解的最佳工艺条件为料液比1∶61.80(g/mL),酶添加量5.52%,提取时间3 h 12 min,此条件下墨红玫瑰花瓣还原糖含量为122.99±1.14 mg/g。HPLC分析发现2种酶解处理的墨红玫瑰花瓣提取物所含的主要还原糖均为葡萄糖和半乳糖。经酶法处理后获得的墨红玫瑰花瓣提取物的还原糖含量、抗氧化性及弹性蛋白酶抑制力均得到明显提升,为墨红玫瑰花深加工提供理论支持。展开更多
Cooking quality of dehusked splits is influenced by the dehulling method,in particular,by the pre-milling treatments.The effects of four enzymatic hydrolysis parameters,i.e.,enzyme concentration(20-60 mg/100 g dry mat...Cooking quality of dehusked splits is influenced by the dehulling method,in particular,by the pre-milling treatments.The effects of four enzymatic hydrolysis parameters,i.e.,enzyme concentration(20-60 mg/100 g dry matter),incubation time(3-15 h),incubation temperature(40-60℃)and tempering water pH(4.0-6.0)on cooking time of pigeon pea dhal were optimized using response surface methodology.Three kinds of enzymes,i.e.,xylanase,pectinase,and cellulas were used in combination for enzymatic pre-treatment.A quadratic model satisfactorily described the dehulling efficiency with high value for the coefficient of determination R^(2)(0.9062).It predicted a minimum cooking time of 21.91 min at enzyme concentration of 37.8 mg/100 g dry matter,incubation time 8.69 min,incubation temperature 48.5℃ and pH 5.49 of tempering water.Cooking time at optimum condition was observed to be 21.50 min and the predicted values of cooking time showed 2.19% deviation from the experimental values.Results of the study revealed that cooking time of enzyme treated dhal could be decreased by 19.77% compared to the oil treated dhal.展开更多
文摘以墨红玫瑰花瓣为原料,采用纤维素酶或果胶酶处理墨红玫瑰花瓣,以还原糖含量为指标,通过单因素和响应面试验确定墨红玫瑰花瓣酶解过程中料液比、酶添加量和酶解时间的最佳条件。在此基础上,检测酶解提取对样品抗氧化、弹性蛋白酶抑制活性的影响。结果表明,纤维素酶酶解的最佳工艺条件如下:料液比1∶54.20(g/mL),纤维素酶添加量4.00%,提取时间3 h 49 min,所得提取物中还原糖含量达到139.07±1.32 mg/g。果胶酶酶解的最佳工艺条件为料液比1∶61.80(g/mL),酶添加量5.52%,提取时间3 h 12 min,此条件下墨红玫瑰花瓣还原糖含量为122.99±1.14 mg/g。HPLC分析发现2种酶解处理的墨红玫瑰花瓣提取物所含的主要还原糖均为葡萄糖和半乳糖。经酶法处理后获得的墨红玫瑰花瓣提取物的还原糖含量、抗氧化性及弹性蛋白酶抑制力均得到明显提升,为墨红玫瑰花深加工提供理论支持。
文摘Cooking quality of dehusked splits is influenced by the dehulling method,in particular,by the pre-milling treatments.The effects of four enzymatic hydrolysis parameters,i.e.,enzyme concentration(20-60 mg/100 g dry matter),incubation time(3-15 h),incubation temperature(40-60℃)and tempering water pH(4.0-6.0)on cooking time of pigeon pea dhal were optimized using response surface methodology.Three kinds of enzymes,i.e.,xylanase,pectinase,and cellulas were used in combination for enzymatic pre-treatment.A quadratic model satisfactorily described the dehulling efficiency with high value for the coefficient of determination R^(2)(0.9062).It predicted a minimum cooking time of 21.91 min at enzyme concentration of 37.8 mg/100 g dry matter,incubation time 8.69 min,incubation temperature 48.5℃ and pH 5.49 of tempering water.Cooking time at optimum condition was observed to be 21.50 min and the predicted values of cooking time showed 2.19% deviation from the experimental values.Results of the study revealed that cooking time of enzyme treated dhal could be decreased by 19.77% compared to the oil treated dhal.