Through dual quadratic rotary regression orthogonal design experiment with four factors,the effects of microwave power,microwave pretreatment time,the amount of ethanol and ethanol concentration on the yield of total ...Through dual quadratic rotary regression orthogonal design experiment with four factors,the effects of microwave power,microwave pretreatment time,the amount of ethanol and ethanol concentration on the yield of total alkaloid were investigated,and a mathematical model describing the relationship between the yield of total alkaloid and influence parameters was developed.Results showed that the regression equation is significant.The optimum extracting conditions were obtained that the microwave power was 500W,pretreatment time was 95s,the volume of ethanol was 9.8mL and ethanol concentration was 0.66,under which the yield of total alkaloid was 690.4μg/g.展开更多
在90 mm×1 000 mm 的有机玻璃流化床中,采用 PV4A 颗粒测速仪测定了不同粒径的河沙、聚氯乙稀(PVC)颗粒在操作气速为0.218~0.524 m/s 下不同轴/径向位置的颗粒浓度波动信号,考察了颗粒浓度波动信号多尺度分解的尺度,以及代表颗...在90 mm×1 000 mm 的有机玻璃流化床中,采用 PV4A 颗粒测速仪测定了不同粒径的河沙、聚氯乙稀(PVC)颗粒在操作气速为0.218~0.524 m/s 下不同轴/径向位置的颗粒浓度波动信号,考察了颗粒浓度波动信号多尺度分解的尺度,以及代表颗粒和各不同尺寸气泡运动的细节信号的能量分率与操作条件的关系。研究表明,各尺度下细节信号的能量分率随操作气速、轴向距离增大而增加,随径向距离增大而减小。展开更多
文摘Through dual quadratic rotary regression orthogonal design experiment with four factors,the effects of microwave power,microwave pretreatment time,the amount of ethanol and ethanol concentration on the yield of total alkaloid were investigated,and a mathematical model describing the relationship between the yield of total alkaloid and influence parameters was developed.Results showed that the regression equation is significant.The optimum extracting conditions were obtained that the microwave power was 500W,pretreatment time was 95s,the volume of ethanol was 9.8mL and ethanol concentration was 0.66,under which the yield of total alkaloid was 690.4μg/g.
文摘在90 mm×1 000 mm 的有机玻璃流化床中,采用 PV4A 颗粒测速仪测定了不同粒径的河沙、聚氯乙稀(PVC)颗粒在操作气速为0.218~0.524 m/s 下不同轴/径向位置的颗粒浓度波动信号,考察了颗粒浓度波动信号多尺度分解的尺度,以及代表颗粒和各不同尺寸气泡运动的细节信号的能量分率与操作条件的关系。研究表明,各尺度下细节信号的能量分率随操作气速、轴向距离增大而增加,随径向距离增大而减小。