A series of porous resins (PYR) with different content of pyridyl group were prepared,and their physical structure and adsorption properties on the stevia glycosides werestudied in detail. Afler the selective adsorpti...A series of porous resins (PYR) with different content of pyridyl group were prepared,and their physical structure and adsorption properties on the stevia glycosides werestudied in detail. Afler the selective adsorption of PYR resins, the rebaudioside A couldbe separated hem the other components of the stevia glycosides, and a new methodforobtaining pure rebaudioside A is reported.展开更多
In this study, the separation and purification of Cordyceps sinensis polysaccharides by AB-8 and D-280 macro porous ad- sorption resin were researched, the adsorption characters when AB-8 macro porous adsorption resin...In this study, the separation and purification of Cordyceps sinensis polysaccharides by AB-8 and D-280 macro porous ad- sorption resin were researched, the adsorption characters when AB-8 macro porous adsorption resin processed Cordyceps sinensis leachate were determined, and the eluent were bleaching treated by D-280 macro porous adsorption resin. The results showed that the concentration of 2.0mg/mL, pH = 6 at a flow rate of 0.8mL/min. The yielding amount of polysaccharides is 246.4mg, and after decolouring treatment, the final yield is 207.1 mg.展开更多
The equilibrium and kinetic characteristics of the adsorption of erythromycin to Sepabeads SP825 were determined.The equilibrium data in a batch system was well described by a Langmuir isotherm.The separation performa...The equilibrium and kinetic characteristics of the adsorption of erythromycin to Sepabeads SP825 were determined.The equilibrium data in a batch system was well described by a Langmuir isotherm.The separation performance was investigated in a fixed-bed system with respect to the adsorption superficial velocity,ionic strength and pH.A mathematical model was used to simulate the mass transfer mechanism,taking film mass transfer,pore diffusion and axial dispersion into account.The model predictions were consistent with the experi-mental data and were consequently used to determine the mass transfer coefficients.展开更多
文摘A series of porous resins (PYR) with different content of pyridyl group were prepared,and their physical structure and adsorption properties on the stevia glycosides werestudied in detail. Afler the selective adsorption of PYR resins, the rebaudioside A couldbe separated hem the other components of the stevia glycosides, and a new methodforobtaining pure rebaudioside A is reported.
文摘In this study, the separation and purification of Cordyceps sinensis polysaccharides by AB-8 and D-280 macro porous ad- sorption resin were researched, the adsorption characters when AB-8 macro porous adsorption resin processed Cordyceps sinensis leachate were determined, and the eluent were bleaching treated by D-280 macro porous adsorption resin. The results showed that the concentration of 2.0mg/mL, pH = 6 at a flow rate of 0.8mL/min. The yielding amount of polysaccharides is 246.4mg, and after decolouring treatment, the final yield is 207.1 mg.
文摘The equilibrium and kinetic characteristics of the adsorption of erythromycin to Sepabeads SP825 were determined.The equilibrium data in a batch system was well described by a Langmuir isotherm.The separation performance was investigated in a fixed-bed system with respect to the adsorption superficial velocity,ionic strength and pH.A mathematical model was used to simulate the mass transfer mechanism,taking film mass transfer,pore diffusion and axial dispersion into account.The model predictions were consistent with the experi-mental data and were consequently used to determine the mass transfer coefficients.
