HydrogenChemical BondsOxygen AdditionsNitrogen AdditionsThe temperature dependency of the phosphorescence properties of aromatic hydrocarbons (phenanthrene) in alcoholic glasses exhibits a number of phenomena that have not been previously described. Chief among these are the effects of added gases (O sub 2...
By using molecular modeling we have found a hydrogen bond in the transition state for protease/amidase catalyzed hydrolysis of peptides and amides donated by the scissile NH-group of the substrate. The hydrogen-bond acceptor was found either in the enzyme (enzyme assisted) or in the substrate ...
Dihydrogen-catalyzed reversible carbon-hydrogen and nitrogen-hydrogen bond formation in organometallic iridium complexes, Angew. Chem., Int. Ed. 2012, 51, ... RJ Lopez-Serrano - 《Angewandte Chemie》 被引量: 0发表: 2012年 Bimetallic Pd(III) complexes in palladium-catalysed carbon–heteroatom bon...
One crystalline form of boron nitride (BN), for example, is nearly as hard as diamond and less easily oxidized and so is useful as a high-temperature abrasive. The inorganic cyanides contain the group CN−. Hydrogen cyanide, or formonitrile, HCN, is a highly volatile and extremely ...
which offer protic hydrogen to lower the activation energy of direct carbonaromatic–oxygen bond scission and the hydrogenation of hydroxy groups. Thus, by employing different ruthenium catalysts, including Ru/TiO2, Ru/Al2O3, Ru/ZrO2and Ru/C, we demonstrate that N2promotion of hydrodeoxygenation ...
Each amino acid remnant base (nth) ketonic oxygen with multi-peptide chain C proper to 4th remnant base (n+4) the amide nitrogen forms the hydrogen bond.In the model right hand alpha - spiral structure, the pitch is 0.54nm, each includes 3.6 amino acid remnant bases, each remnant base ...
The plot of the relative chemical shifts, Δδ(15N) = δ(AHB) δ(B), against ΔpKa gives a titration curve that reflects the variation of the hydrogen bond strength and the proton moves from the acid to the N-oxide. According to previous IR data, in the complexes from the inversion ...
NOX is a membrane-bound enzyme complex in the plasma membrane and in the ER. The O2− produced is dismutated by superoxide dismutase (SOD; SOD1, intermembrane space and cytoplasm; SOD2, mitochondrial; SOD3, extracellular) to hydrogen peroxide (H2O2), which can also be produced directly ...
We find two different bonding environments for N, which are identified through different frequencies for the Si-N asymmetric bond-stretching vibration, 840 cmfor the high-Tfilms, and 790 cmfor the low-Tfilms. In films deposited on substrates held at temperatures in excess of 300°C, the N ...
bond, and these factors result in a thermostability of 200 °C, the highest thermostability among all NF-based compounds reported. In addition, the insensitivity and detonation performance support HOF-NF as the first example of an NF derivative with an actual potential application. We believe ...