乙醇从葛根中提取黄酮动力学

The kinetics of leaching flavonoids from Pueraria Lobata with ethanol was investigated. The effects of leaching temperature, mechanical agitation rate, concentration of ethanol and feed particle size on leaching kinetics were examined. It is found that the smaller the feed particle size or the higher the leaching temperature, the higher the leaching rate. The leaching process can be described by the shrinking-core model. The apparent activation energy is 10.8kJ·mol^-1, suggesting that the leaching process is controlled by the inner diffusion. An empirical equation relating the flavonoids leaching rate constant to the feed particle size and leaching temperature was expected.     

板栗微波—烘烤联合脱壳去皮工艺优化

为了提高板栗的脱壳去皮率,采用微波—烘烤联合工艺对板栗进行脱壳去皮,并采用响应面法分析微波时间、烘烤时间、烘烤温度对板栗脱壳去皮率和栗仁色差L*值的影响,分别以脱壳去皮率和色差L*值为指标,对工艺参数进行优化并建立预测模型。结果表明:在微波时间123s,烘烤温度171℃,烘烤时间128s的条件下,板栗脱壳去皮率可达97.96%,栗仁色差L*值为56.67;在微波时间137s、烘烤温度167℃、烘烤时间116s的条件下,栗仁色差L*值为58.94,板栗脱壳去皮率为95.45%。     

米麦通脆度测试方法研究

利用质构仪的压缩模式研究米麦通脆度的测试方法。首先采用感官评价法对米麦通进行脆度评价,再采用质构仪的压缩模式对米麦通进行质构分析,应用Spss统计分析软件对脆度感官评价数据与质构测试数据进行统计分析,研究二者的相关性,并建立米麦通脆度的预测模型。结果表明:压缩测试最佳参数为压缩速度1.0mm/s,压缩形变量50%,最大正峰力(X1)、正峰面积(X2)、达到最大峰的面积(X3)、到达最大正峰力的线性距离(X4)与产品脆度具有极显著相关性,预测模型为Y=-4.130+0.241 X1-0.101 X2-0.487 X3+0.128 X4,相关系数为0.977,P0.05,该模型可以预测米麦通的脆度。