A novel hydrophilic macromer adapted for chemical grafting has been synthesized. It consists of methyl-end-capped poly(ethylene glycol) functionalized with a urethane terminus. Dispersion polymerization of styrene in an alcohol/water medium in the presence of the macromer allows chemical grafting of the macromer to the surfaces of the developing polystyrene (PS) latex particles. Scanning and tr...

In the polymer electrolyte membrane fuel cells (PEMFCs), low corrosion resistance and high interfacial contact resistance (ICR) are two controversial issues in usage of AISI 316L stainless steel as a metallic bipolar plate. For solving these problems, investigation and development of different coatings and/or surface treatments are inevitable. Corrosion behavior and ICR of AISI 316L specimens c...

Lysophosphatidic acid (LPA) has attracted recent attention as a major serum-derived regulator implicated in responses to vascular injury and inflammation, in tumour invasiveness and in neuronal signalling and remodelling. Although the possibility of a specific G-protein-coupled LPA receptor protein has been suggested, characterization of such a receptor is lacking. Since LPA can activate protei...

Photolyase uses light energy to split UV-induced cyclobutane dimers in damaged DNA, but its molecular mechanism has never been directly revealed. Here, we report the direct mapping of catalytic processes through femtosecond synchronization of the enzymatic dynamics with the repair function. We observed direct electron transfer from the excited flavin cofactor to the dimer in 170 ps and back ele...

Based on the working hypothesis that the OA-6129 group of carbapenem compounds might be the direct precursors for PS-5, epithienamycins A and C and MM 17880, Streptomyces fulvoviridis A933 17M9, a producer of PS-5, PS-6, PS-7, PS-8, epithienamycins A, B, C and D, MM 17880, MM 13902 and MM 4550, was subjected to NTG-mutation to provide a blocked mutant numbered 1501 which was found to produce OA...

Mutations in the presenilin 1 ( PS-1 ) gene cause Alzheimer's disease (AD). These mutations alter the processing of the amyloid precursor protein (APP) by increasing the production of the fibrillogenic amyloid fragment, Abeta1-42/43. Since the secretase activities that process APP are localized in different intracellular compartments, it is likely that membrane transport is a key factor in the ...

We study the net dielectron production rates from an ensemble of thermal mesons, using an effective Lagrangian to model their interaction. The coupling between the electromagnetic and the hadronic sectors is done through the vector meson dominance approach. For the first time, a complete set of light mesons is considered. We include contributions from decays of the type V (PS) → PS (V) + e+ e, ...

The increase in plastic recycling is an essential pre-requisite for the transition to a circular economy. Polystyrene (PS) low diffusive polymer and therefore promising candidate back into food contact similar polyethylene terephthalate (PET). However, such of PS cups has been not established date on commercial scale. Even if desired, health consumer must be at risk. As consequence, processes g...