共轭亚油酸与人体健康

共轭亚油酸(CLAs)有很多对人体有益的生理功能,报道更多的也是关于这方面的研究;但是最近有研究认为CLAs有可能会对人体产生有害作用,如致癌等.本文阐述了它的生理功能及可能的影响因素,并指出它的可能危害.     

Effect of ph on the extraction characteristics of succinic acid and the stability of colloidal liquid aphrons

Predispersed solvent extraction (PDSE) by colloidal liquid aphrons (CLAs) was used for the extraction of succinic acid from aqueous solution. The loading values for succinic acid in PDSE by CLAs increased with increasing pH values in aqueous phase. This was due to increasing of the concentration of the undissociated succinic acid. The extractability of PDSE was higher than that of conventional contacting type extraction because of the interaction between factant and acid molecule. The stability of CLAs increased with increasing of the pH values in aqueous phase and decreasing of trioctylamine (TOA) concentration in organic phase. However, the structure of CLAs was stable at all the pH range except very low pH condition. This paper is dedicated to Professor Wha Young Lee on the occasion of his retirement from Seoul National University.     

The resistance of interphase mass transfer in colloidal liquid aphron systems

Colloidal liquid aphrons (CLAs) provide very large interfacial area and thus could enhance interphase mass transfer in multiphase processes. This work characterized the mass transfer behavior of CLAs during mass transfer of benzoic acid from cyclohexane in CLAs to water in a small stirred vessel. From experimental data the overall mass transfer coefficient K_L of the surfactant-stabilized CLAs was determined. The influence of stirring speed and concentration of surfactant used for formulating CLAs on K_L was investigated. The experimental results show that surfactant adsorbed on the interface of CLAs influences greatly the value of K_L, and when the surfactant concentration is below its CMC, the overall CLAs mass transfer coefficient K_L (mainly varying with the interfacial mass transfer resistance) could be fitted to the following expression:

K_L=H₁+H₂ln[C+H₃].