In the pursuit of good performing, low cost, and scalable anion-exchange membranes (AEM), a series blended electrolytes based on cross-linked quaternized poly epichlorohydrin (qPECH) polyvin...

Fabricating crosslinked radiation-grafted anion-exchange membranes using a diamine in the amination synthesis step leads to better permselectivity-resistance balance compared use of divinylbenzene grafting step.

In ion-exchange membranes (IEMs), the concentration-induced tradeoff between conductivity and permselectivity constrains process performance. This study investigates impacts of different electrolytes on conductivity-permselectivity commercial cation anion exchange membranes. Nine electrolyte solutions containing mono-, di-, trivalent ions, spanning 1.5 orders magnitude in concentration were exa...

premature rupture of membranes (prom) is one of the most common complications of pregnancy that has a major impact on neonatal outcomes. with respect to racial, nutritional and cultural differences between developed and developing countries, this study was conducted to detect the prevalence of neonatal complications following prom and the role of the duration of rupture of membranes in producin...

Streptococcus lactis metabolizes arginine via the arginine deiminase pathway to ornithine, CO2, NH3, and ATP. The translocation of arginine and ornithine has been studied using membrane vesicles of galactose/arginine-grown cells of S. lactis fused with cytochrome c oxidase proteoliposomes by the freeze/thaw--sonication procedure earlier described. In the presence of reduced cytochrome c the fus...

Functionalized graphene oxide (FGO) reinforced quaternized poly(ether ether ketone) membranes were prepared for high temperature proton exchange membrane applications. The introduction of FGO significantly improved the mechanical strength and oxidative stability of these membranes at a high doping level. These reinforced membranes showed high tensile strength up to 40 MPa and high proton conduc...

Na+/Ca2+exchange has been investigated in squid ( Loligo pealei) rhabdomeric membranes. Ca2+-containing vesicles have been prepared from purified rhabdomeric membranes by extrusion through polycarbonate filters of 1-μm pore size. After removal of external Ca2+, up to 90% of the entrapped Ca2+ could be specifically released by the addition of Na+; this finding indicates that most of the vesicles...

Arf (ADP-ribosylation factor) proteins form a special class of small GTP-binding proteins in that their activation by GDP/GTP exchange is coupled to their recruitment to membranes using a built-in structural mechanism. These coupled processes are stimulated by GEFs (guanine nucleotide-exchange factors) that carry a catalytic Sec7 domain, whose basic mechanism has been uncovered by biochemical a...