The microstructures and thermodynamic properties of mixed systems comprising pyridinium ionic liquid[HPy][BF_(4)]and acetonitrile at different mole fractions were studied using molecular dynamics simulation in this wo...The microstructures and thermodynamic properties of mixed systems comprising pyridinium ionic liquid[HPy][BF_(4)]and acetonitrile at different mole fractions were studied using molecular dynamics simulation in this work.The following properties were determined:density,self-diffusion coefficient,excess molar volume,and radial distribution function.The results show that with an increase in the mole fraction of[HPy][BF_(4)],the self-diffusion coefficient decreases.Additionally,the excess molar volume initially decreases,reaches a minimum,and then increases.The rules of radial distribution functions(RDFs)of characteristic atoms are different.With increasing the mole fraction of[HPy][BF_(4)],the first peak of the RDFs of HA1-F decreases,while that of CT6-CT6 rises at first and then decreases.This indicates that the solvent molecules affect the polar and non-polar regions of[HPy][BF_(4)]differently.展开更多
为开发利用蕉柑落果资源,提高蕉柑落果中辛弗林的提取率,并尽量保护蕉柑组织形态完整,对质构保护液质量浓度以及真空气流细胞破壁技术的4个影响因素进行考察;并采用Box-Behnken试验设计及响应面分析对真空气流细胞破壁技术的工艺条件进...为开发利用蕉柑落果资源,提高蕉柑落果中辛弗林的提取率,并尽量保护蕉柑组织形态完整,对质构保护液质量浓度以及真空气流细胞破壁技术的4个影响因素进行考察;并采用Box-Behnken试验设计及响应面分析对真空气流细胞破壁技术的工艺条件进行优化。结果表明,质构保护最佳处理工艺为:首先在质量浓度0.3 g/100 m L的海藻酸钠溶液中浸泡20 min,接着在质量浓度0.15 g/100 m L的氯化钙溶液中浸泡60 min;真空气流细胞破壁前处理最佳工艺为:泄压温度100℃、压力差116 k Pa、停滞时间21 min、泄压3次。此时辛弗林提取率为69.42%,破果率为33.21%;相比直接进行亚临界水提取对照组,破果率下降了12.07%,辛弗林提取率增加了26.94%。展开更多
文摘The microstructures and thermodynamic properties of mixed systems comprising pyridinium ionic liquid[HPy][BF_(4)]and acetonitrile at different mole fractions were studied using molecular dynamics simulation in this work.The following properties were determined:density,self-diffusion coefficient,excess molar volume,and radial distribution function.The results show that with an increase in the mole fraction of[HPy][BF_(4)],the self-diffusion coefficient decreases.Additionally,the excess molar volume initially decreases,reaches a minimum,and then increases.The rules of radial distribution functions(RDFs)of characteristic atoms are different.With increasing the mole fraction of[HPy][BF_(4)],the first peak of the RDFs of HA1-F decreases,while that of CT6-CT6 rises at first and then decreases.This indicates that the solvent molecules affect the polar and non-polar regions of[HPy][BF_(4)]differently.
文摘为开发利用蕉柑落果资源,提高蕉柑落果中辛弗林的提取率,并尽量保护蕉柑组织形态完整,对质构保护液质量浓度以及真空气流细胞破壁技术的4个影响因素进行考察;并采用Box-Behnken试验设计及响应面分析对真空气流细胞破壁技术的工艺条件进行优化。结果表明,质构保护最佳处理工艺为:首先在质量浓度0.3 g/100 m L的海藻酸钠溶液中浸泡20 min,接着在质量浓度0.15 g/100 m L的氯化钙溶液中浸泡60 min;真空气流细胞破壁前处理最佳工艺为:泄压温度100℃、压力差116 k Pa、停滞时间21 min、泄压3次。此时辛弗林提取率为69.42%,破果率为33.21%;相比直接进行亚临界水提取对照组,破果率下降了12.07%,辛弗林提取率增加了26.94%。
