Weak polyanion and strong polycation complex based membranes: Linking aqueous phase separation to traditional membrane fabrication

Central composite experimental design applied to fabrication of LLDPE microporous membrane via thermally induced phase separation (TIPS) method

Arrest of cell membrane movements by in vitro incubation with polycation reversed by polyanion.

A total arrest of cell membrane movement occurred after incubation for 2 h of cultured fibroblasts with the polycation DEAE-dextran. The immobilized cells resumed normal membrane undulations after exposure for 5 min to the polyanion dextran-sulphate. The influence of DEAE-dextran on the electrophoretic mobility, which was seen after 10 min of incubation was also erased by a subsequent incubatio...

Strong and weak points of membrane systems applied to gas separation

Membrane operations are being asserted as a tangible option to conventional technologies in gas separation due to an advanced flexibility to tolerate fluctuations in feed composition and flow rate, operational simplicity and reliability, absence of moving parts, particularly when weight and space requirements are important. Most of the commercial synthetic membranes are made of polymers, charac...

Fabrication of Gelatin Scaffolds Using Thermally Induced Phase Separation Technique

Gelatin is considered as a partially degraded product of collagen and it is a biodegradable polymer which can be used to produce scaffolds for tissue engineering. Three-dimensional, porous gelatin scaffolds were fabricated by thermally induced phase separation and freeze-drying method. Their porous structure and pore size were characterized by scanning electron microscopy. Scaffolds with differ...

Phase separation in lipid membranes.

Cell membranes show complex behavior, in part because of the large number of different components that interact with each other in different ways. One aspect of this complex behavior is lateral organization of components on a range of spatial scales. We found that lipid-only mixtures can model the range of size scales, from approximately 2 nm up to microns. Furthermore, the size of compositiona...