A parameter is introduced which characterizes the strength of electron correlations in chemical bonds. It is calculated for a number of bonds. The results show that for a given type of bond (e.g. σ, isolated π, conjugated π, etc.) this parameter is almost independent of the types of ...
Pegylated zinc protoporphyrin (PEG-ZnPP) is a water-soluble inhibitor of heme oxygenase-1. In this study, we prepared two types of PEG-ZnPP conjugates with different chemical bonds between PEG and ZnPP, i.e., ester bonds and ether bonds, where both conjugates also contain amide bonds. Cleav...
Some common examples of metallic solids are iron, gold, silver, and copper. II. Covalent Network Solids: Covalent network solids are composed of atoms that are bonded to each other through covalent bonds, which are strong chemical bonds resulting from the sharing of electrons between atoms. The...
FT-IR spectra of silane- (a) and siloxane-treated (b) waterlogged elm samples. Full size image Comparing to control spectrum, the spectra of treated wood indicate, apart from the bands assigned to wood, the presence of the bands which are expected to appear due to the chemical bonds from...
The influence of "starving plasma" regime on carbon content and bonds in a-Si1xCx:H thin films Differences on carbon content and chemical bonds ina-Si1xCx:Hwere observed and analyzed in carbon rich and silicon rich films, deposited by plasma enhanced... I Pereyra,MNP Carren?O,MH Tabacnik...
Structure and Function of RNA RNA structure RNA is usually made of a single strand of ribonucleotides held together by phosphodiester bonds. In the RNA chain, a ribonucleotide is made up of ribose, which is a pentose sugar, one of the four nitrogenous bases (A, U, G, or C),...
Co0 appears to be particularly sensitive to steric effects, nitriles being cotrimerized with C≡C bonds in good yields only when sterically demanding groups are present in the diyne. The CoCl2/Mn system exhibits a type of reactivity which is in accord with the formation of Co0....
of cations like Pr3: the latter are positioned at two different sites and have two different coordination shells, corresponding to a coordination chemistry under confined conditions; a fascinating aspect is that capsule encapsulated water shells fixed by hydrogen bonds act formally as polydentate ligands...
negtec.rHesoinws-, ever, most of them suffer from low adsorption capacities (or a long time is required for saturation), lack of good chemical/thermal stability and/or selectivity relative to other gases, or they have reduced activity in the presence of moisture, such as zeolite-based ...
Chemical description of extracellular polymers: implication on activated sludge floc structure This supposed that proteins are more involved than sugars in electrostatic bonds with multivalent cations. Electrostatic bonds were found to be uniformly ... MF Dignac,V Urbain,D Rybacki,... - 《Water Scie...