This study was conducted to investigate the effects of cellulase dosage, enzymolysis time, pH and enzymolysis temperature on procyanidin extraction rate by single factor experiment, with tartary buckwheat shell as an ...This study was conducted to investigate the effects of cellulase dosage, enzymolysis time, pH and enzymolysis temperature on procyanidin extraction rate by single factor experiment, with tartary buckwheat shell as an experimental material.Main process parameters were optimized to obtain a regression model by response surface methodology. The results of variance analysis indicated that the regression model reflected the relationship between buckwheat shell procyanidin extraction rate with enzyme dosage, enzymolysis time, pH and enzymolysis temperature; and the optimal process parameters were enzyme dosage of 6.5 mg/g, enzymolysis time of 1.5 h, pH at 4.7 and enzymolysis temperature at 46 ℃. Three parallel experiments were conducted under these process parameters. In practice, the highest procyanidin extraction rate was 6.78 g/100 g. The relative error between the predicted value of regression model and the actual value was 1.3%. The regression equation fitted the real situation better.展开更多
In this study, the extraction process of aflatoxin B~ from tartary buckwheat bran was optimized with ELISA detection method to determine the optimal conditions for extracting aflatoxin B1 from tartary buckwheat bran. ...In this study, the extraction process of aflatoxin B~ from tartary buckwheat bran was optimized with ELISA detection method to determine the optimal conditions for extracting aflatoxin B1 from tartary buckwheat bran. The results of standard recovery test of blank solvent and sample confirmed the feasibility of ELISA detection method. Orthogonal experiment was performed to optimize the solid-liquid ratio, ultrasonic extraction time and ultrasonic amplitude. The results show that it is feasible to detect aflatoxin B1 content with ELISA method. The optimal ultrasonic extraction conditions were : methanol-water ratio 6: 4, solld-liquid ratio 1 g: 5 ml, ultrasonic extraction time 15 min, ultrasonic amplitude 15 ~. Under the optimized conditions, 1 065.1 ng/L aflatoxin B1 was extracted from tartary buckwheat bran.展开更多
基金Supported by Shanxi Soft Science Research Program(2014041020-2)
文摘This study was conducted to investigate the effects of cellulase dosage, enzymolysis time, pH and enzymolysis temperature on procyanidin extraction rate by single factor experiment, with tartary buckwheat shell as an experimental material.Main process parameters were optimized to obtain a regression model by response surface methodology. The results of variance analysis indicated that the regression model reflected the relationship between buckwheat shell procyanidin extraction rate with enzyme dosage, enzymolysis time, pH and enzymolysis temperature; and the optimal process parameters were enzyme dosage of 6.5 mg/g, enzymolysis time of 1.5 h, pH at 4.7 and enzymolysis temperature at 46 ℃. Three parallel experiments were conducted under these process parameters. In practice, the highest procyanidin extraction rate was 6.78 g/100 g. The relative error between the predicted value of regression model and the actual value was 1.3%. The regression equation fitted the real situation better.
基金Supported by Key Science and Technology Project of Education Department of Sichuan Province(13ZA0157)
文摘In this study, the extraction process of aflatoxin B~ from tartary buckwheat bran was optimized with ELISA detection method to determine the optimal conditions for extracting aflatoxin B1 from tartary buckwheat bran. The results of standard recovery test of blank solvent and sample confirmed the feasibility of ELISA detection method. Orthogonal experiment was performed to optimize the solid-liquid ratio, ultrasonic extraction time and ultrasonic amplitude. The results show that it is feasible to detect aflatoxin B1 content with ELISA method. The optimal ultrasonic extraction conditions were : methanol-water ratio 6: 4, solld-liquid ratio 1 g: 5 ml, ultrasonic extraction time 15 min, ultrasonic amplitude 15 ~. Under the optimized conditions, 1 065.1 ng/L aflatoxin B1 was extracted from tartary buckwheat bran.