Sulfonated sPPFS-b-PBuA diblock and statistical copolymers based on 2,3,4,5,6-pentafluorostyrene PFS butyl acrylate BuA were elaborated for Proton Exchange Membrane Water Electrolyser (PEMWE) purposes. The block (BCP) synthetized by Nitroxide Mediated Polymerization NMP, a controlled radical polymerization technique that yields well-defined molar mass low dispersity material. These diblock-copo...

The antimicrobial activity of a wound dressing is a key factor for preventing and treating wound infection. The current study evaluated the physiochemical properties and antimicrobial activities of semi-IPNs (interpenetrating polymer networks) based on chitosan/polyvinyl alcohol (PVA) films and nanofibers as candidates for wound dressings and investigated the effects of morphologies (nanofibrou...

Processing of viral DNA by retroviral integrase leaves a dinucleotide single-strand overhang in the unprocessed strand. Previous studies have stressed the importance of the 5' single-stranded (ss) tail in the integration process. To characterize the ss-tail binding site on M-MuLV integrase, we carried out crosslinking studies utilizing a disintegration substrate that mimics the covalent interme...

In this research a chemical modification of kraft lignin was carried out using basic nucleophilic substitution reaction (NSA) in order to functionalize it as novel crosslinking agent for the synthesis active hydrogels. The success synthesized crosslinker demonstrated by several techniques such volumetry probes, FTIR, 1H-NMR and DSC. Thus, obtained materials were employed during acrylic acid-bas...

For the first time, protein fibers with excellent mechanical properties and water stability have been produced from gliadin for potential use in tissue culture and other medical applications. Biomaterials developed from plant proteins such as zein and soyproteins are preferred for several medical applications over synthetic polymers such as polylactic acid. However, the plant protein based biom...

The purpose of this research was to monitor the migration of formaldehyde from a polyethylene glycol (PEG) fill into the gelatin shell of a soft elastic gelatin capsule (SEGC) using near-infrared (NIR) spectrophotometry. SEGCs were filled with five solutions of aqueous formaldehyde in PEG (0, 0.05, 0.10, 0.20, and 0.40 v/v%), stored at ambient conditions for 48 hr, emptied, and scanned in NIR s...

A hydrogel is a water-insoluble three-dimensional polymer network that has the ability to absorb body fluids in biological environment. Such formed through chemical crosslinking mechanisms such as optical polymerization, enzymatic reactions and physical temperature pH dependent processes ionic crosslinking. Physical hydrogels are weak secondary force by covalent forces. Various polymers of natu...

Abstract Degussa P25 titanium dioxide/chitosan composites (P25/CS) were prepared using three different methods and two chitosan materials. The obtained materials characterized by diffuse reflectance UV–Vis, Fourier-transform infrared spectroscopies, X-ray diffraction, scanning electron microscopy. It was observed for all that the surface is homogeneously covered P25, particles are evenly disper...