Selection of MWCO of membranes used in the ultrafiltration of the extraction liquid of Rhodiola sachalinensis;

Preparation of poly (phthalazinone ether nitrile ketone) ultrafiltration membrane with low molecular weight cut-off;

Steric-hindrance pore model for separation of uncharged solutes by nanofiltration with molecular weight cut-off as parameters;

Method for obtaining molecular weight cut-off of nanofiltration membrane;

Although ultrafiltration is an efficient disinfection process for removing pathogenic microorganisms such as bacteria,viruses and parasites, it is relatively ineffective in removing the natural organic matter because of its high molecular weight cutoff.

In this work, using these subjects as the low molecule models, and a series of poly(ethylene glycol)s (PEG) of different molecular mass as the high molecule models to study the molecular mass cut-off(MMCO) the diffusivity of chitosan/alginate microcapsules were investigated.

Objective: To investigate the impact of retain molecular weight of milipore filters on the effect of purification and compare it with the effect of purification made by the method of alcohol precipitation.