ABSTRACT
AIM To investigate the effect of β-cyclodextrin-assisted extraction on Cassiae Semen.METHODS The chemical constituents in aqueous extract and β-cyclodextrin extract determined and analyzed by UPLC and principal component analysis had their antioxidant activities tested by six methods (protective effects on lipid peroxidation injuries induced by spontaneous liver,CCl4,H2 O2,FeSO4-vitamin C,and scavenging effects on DPPH,hydroxyl free radicals).RESULTS Compared with aqueous extract,the component content and antioxidant activity of β-cyclodextrin extract were increased by 10.476％ and 80.88％,respectively.CONCLUSION β-Cyclodextrin can effectively enhance the component extraction rate and antioxidant activity of Cassiae Semen.
ABSTRACT
Objective: To study the influencing factors of membrane flux (J) and membrane fouling resistance (Rf) in the mincrofiltration of the water extract of Cassia Semen with ceramic membrane. Methods: Based on single-factor experiment, the process parameters in the mincrofiltration of the water extract of Cassia Semen were optimized by orthogonal design method using weighted composite score of Rf and J as evaluation. The correlation between Rf and J with main four process parameters was analyzed. Results: The best microfiltration process condition was as follow: Membrane aperture size was 0.2 μm, concentration of the water extract of Cassia Semen was 50.0 g/L, transmembrane differential pressure was 0.1 MPa, and crossflow velocity was 3.32 m/s. Membrane aperture size had a significant correlation with Rf and J. Conclusion: The process parameters have an important effect on Rf and J. The primary and secondary order of the effect of four process parameters on Rf and J is as follow: Membrane aperture size > transmembrane pressure > feed concentration > crossflow velocity.