HpaI, a class II pyruvate-specific aldolase involved in the catabolic pathway of hydroxyphenylacetate, is overexpressed and purified. A previous suggestion that phosphate is involved in proton transfer of pyruvate, based on the crystal structure of the homologous 2-dehydro-3-deoxygalactarate aldolase, is not substantiated from biochemical studies with HpaI. Thus, specific activities of the enzy...

nuclei singles out the isotopic spin exchange part, Vb• of the neutron-proton interaction inside nuclei. Thus a comparison of the experimental cross section for this reaction with a detailed theoretical calculation of the cross section ought to provide the potential Vb of (2). It is important to note that no one has yet succeeded in calculating the correct absolute magnitude of the cross sectio...

Four types of reaction mechanisms for the oxo ligand exchange of monomeric and dimeric neptunyl(VI) hydroxide in aqueous solution were explored computationally using density functional theory (DFT) and ab initio classical molecular dynamics. The obtained results were compared with previous studies on the oxo exchange of uranyl hydroxide, as well as with experiments. It is found that the stable ...

In this work, a review of articles and patents related to the utilization of colloidal metal nanoparticles produced by the decomposition of organometallic precursors as supported electrocatalysts in different electrochemical reactions including hydrogen evolution reaction (HER), oxygen reduction reaction (ORR) and methanol oxidation reaction (MOR) is discussed. In the case of stabilized metal n...

Proton exchang e membranes e xhibiting a well-org anized structure were successfully prepared by a novel self-assembling technique using surface-charged latex nanoparticles as building blocks. The nanoparticles were synthesized in water by free-radical copolymerization. Free-standing membranes were obtained by casting the poly mer e mulsions followed by a cross-linking reaction. The acquired me...

We present calculations of the invariant mass spectra of the Λp system for the exclusive pp → K + Λp reaction with the aim of studying the final state interactions between the Λ-hyperon and the proton. The reaction is described within a meson exchange framework and the final state Λp interactions are incorporated through an off-shell T-matrix for the Λp → Λp scattering, constructed using the av...

Related Articles Dynamic exchange of counterions of polystyrene sulfonate J. Chem. Phys. 136, 084904 (2012) State-to-state reaction probabilities within the quantum transition state framework J. Chem. Phys. 136, 064117 (2012) Semiclassical study of quantum coherence and isotope effects in ultrafast electron transfer reactions coupled to a proton and a phonon bath J. Chem. Phys. 135, 204503 (201...

This paper presents the modeling and simulation of a hybrid proton exchange membrane fuel cell (PEMFC) with an energy storage system for use in a stand-alone distributed generation (DG) system. The simulation model consists of fuel cell DG, lead-acid battery, maximum power point tracking and power conditioning unit which is modeled in the MATLAB/Simulink platform. Poor loadfollowing characteris...