sulfonated poly (ether ether ketone) (speek) with a low degree of sulfonation (ds = 40%) was prepared for proton exchange membrane fuel cells (pemfc). poly (ether ether ketone) (peek) was sulfonated in concentrated h2so4 under n2 atmosphere and characterized by the hydrogen nuclear magnetic resonance (h-nmr) technique. after preparation of the speek polymer, the obtained polymer was dissolved i...

background and objectives: virosomes are virus like particles (vlp) assembled in-vitro. influenza virosomes maintain the cell binding and membrane fusion activity of the wild type virus but are devoid of viral genetic material or internal proteins. influenza virosomes mimic the natural antigen presentation route of the influenza virus. materials and methods: virosomes were prepared by membrane ...

In this work, the synthesis of bimetallic Ag and Cu particles on carbon vulcan (AgCu/C) is reported, synthesized by a simple galvanic displacement method using citrate tribasic hydrate as co-reducing agent commercial material based Cu/C template. The materials were characterized several physicochemical techniques, including TGA, ICP-OES, XRD, SEM, BET. catalysts evaluated cathodic for oxygen re...

A stable, oligomycin-sensitive, ATPase preparation can be isolated from rat liver mitochondria by refinement of the deoxycholate-solubilization procedure (Soper, J. W., and Pedersen, P. L. (1976) Biochemistry 15, 2682). NADM dehydrogenase, succinic dehydrogenase, and cytochrome oxidase activities cannot be detected by enzymatic assay. Spectral measurements reveal that the content of individual ...

Various aspects of particle-stabilized emulsions (or so-called Pickering emulsions) have been extensively investigated during the last two decades, but the preparation of uniform Pickering emulsion droplets via a simple and scalable method has been sparingly realized. We report the preparation of uniform Pickering emulsions by Shirasu porous glass (SPG) membrane emulsification. The size of the ...

The conventional electrodes like glassy carbon electrode and graphite are restricted for large-scale electrochemical production in-vivo applications. Therefore, flexible beginning to replace with such electrodes. This work reports a simple preparation of paper-like material (FPEM) including reduced graphene oxide (rGO) zinc nanoparticles (ZnONPs) possible For this purpose, dispersion was intera...

In this study, effects of Buthus eupeus venom on chick biventer cervices nerve-muscle preparation were investigated by twitch tension method. The venom, at 1.3 ?g/ml, increased contractile responses in indirect stimulations. These effects were milder in direct muscle stimulations. It also caused significant enhancement in postjunctional sensitivity as assessed by responses to exogenous acetylch...

Previous publications 1, ~ in this series have dealt with the preparation and electrochemical properties of the activated (electronegative) collodion membrane. The activation consisted of an oxidation of the nitrocellulose, a process which caused an increase in the number of dissociable groups in the pores of the membrane. Such membranes show more pronounced effects than similar untreated membr...