This paper focuses on a new polyaniline-derived non-precious cathode catalyst with high oxygen-reduction activity, verified in electrochemical and fuel cell testing. The rotating disk (RDE) onset and half-wave potential (E1⁄2) of oxygen reduction were measured at 0.90 V and 0.77 V, respectively. Rotating ring-disk electrode (RRDE) study revealed very good selectivity in the fourelectron reducti...

We tested the hypothesis that the respiratory function of skeletal muscle mitochondria is impaired by lactic acidosis and elevated concentrations of P(i). The rate of respiration of chemically skinned fiber bundles from rat soleus muscle was measured at [P(i)] (brackets denote concentration) and pH values similar to those at rest (3 mM P(i), pH 7.0) and high-intensity exercise (20 mM P(i), pH 6...

Cobaloximes are usually used as molecular hydrogen evolution reaction (HER) catalysts. Herein we report for the first time the use of molecular cobaloximes as catalyst precursors for water oxidation when anodic potentials were applied. Highly active thin catalyst films were deposited at +1.5 V and +1.1 V (vs. Ag/AgCl) in 0.1 M borate buffer solution at pH = 9.2 containing 1 mM cobaloximes. Four...

Magnesium hydrides are considered as the potential hydrogen storage materials. However, high work temperature, slow reaction kinetics and hard activation process limit the practical application of Mg-based hydrides system. Recently, the reaction ball milling (RBM) technique has been successfully introduced to prepare hydrogen storage materials [1, 2]. It combines the courses of sample preparati...

1. Six rumen and abomasal cannulated heifers were used to study the effects of intake on the fractional outflow rates (FOR) of chromium-mordanted cotton-seed meal (Cr-CSM) and meat meal (Cr-MM), CrEDTA, ytterbium and lignin from the rumen. Values of FOR of Cr-CSM and Cr-MM were combined with values of nitrogen disappearance from the protein supplements, placed in porous synthetic (nylon) bags a...

Mixed transition-metals (TM) based catalysts have shown huge promise for water splitting. Conventional synthesis of nanomaterials is strongly constrained by room-temperature equilibria and Ostwald ripening. Ultra-fast temperature cycling enables the metastable metallic phases high entropy alloy nanoparticles, which later transform to oxide/hydroxide nanoparticles upon use in aqueous electrolyte...

Background: The area of contaminated lands exposed to the health risk of environmental pollutants is a matter of argument. In this study, a new method was developed to estimate the amount of area that is exposed to higher than normal levels of Cr, Mn, and V. Methods: Overall, 170 soil samples were collected from the upper 10 cm of soil in an arid area in central part of Iran in Semnan Provin...

The crossing number of a graph G = (V,E), denoted by cr(G), is the smallest number of edge crossings in any drawing of G in the plane. Leighton [14] proved that for any n-vertex graph G of bounded degree, its crossing number satisfies cr(G) + n = Ω(bw(G)), where bw(G) is the bisection width of G. The lower bound method was extended for graphs of arbitrary vertex degrees to cr(G)+ 1 16 ∑ v∈G d 2...

10.1128/IAI.70.6.2853-2861.2002. 2002, 70(6):2853. DOI: Infect. Immun. W. Gibson Marla Stevens-Riley, Anthony A. Campagnari and Bradford Nicole M. Samuels, Robert S. Munson Jr., Eric J. Hansen, Michael V. Tullius, Nancy J. Phillips, N. Karoline Scheffler, Lipooligosaccharide Biosynthesis -1,6-dd-Heptosyltransferase Involved in α -1,4-Galactosyltransferase and an β Encodes a ducreyi Haemophilus ...