These are discussed, and rationalized in terms of a model which presumes that O sub 2 and N sub 2 disrupt the normal hydrogen bonding process between alcohol molecules. (ERA citation 08:051785)Mathers, T. L.Louisiana State Univ.Schoffler, G....
ChemInform Abstract: SEMIEMPIRICAL CALCULATIONS OF ONE-BOND NITROGEN-15-HYDROGEN COUPLING CONSTANTS AND INVERSION BARRIERS AT NITROGEN BARBARA,E.,LEY,... - 《Chemischer Informationsdienst》 被引量: 0发表: 1975年 C13 Splittings in Proton Magnetic Resonance Spectra. I. Hydrocarbons The results are ...
It is also quite diversified throughout the pyridine-type nitrogen atoms and seems to constitute a measure of relative basicity with respect to hydrogen-bond formation of the nitrogens concerned. This basicity seems to parallel that with respect to a full transfer of a proton, as can be ...
The origin of major volatiles nitrogen, carbon, hydrogen, and sulfur in planets is critical for understanding planetary accretion, differentiation, and habitability. However, the detailed process for the origin of Earth’s major volatiles remains unresolved. Nitrogen shows large isotopic fractionations amo...
ChemInform Abstract: GEOMETRY OF THE NITROGEN‐HYDROGEN...OXYGEN‐CARBON (N‐H...O:C) HYDROGEN BOND. 2. THREE‐CENTER (BIFURCATED) AND FOUR‐CENTER (TRIFURCATED) BONDSdoi:10.1002/chin.198416065structure (organic substances)R. TAYLORO. KENNARD...
Nitrogen is the main limiting nutrient after carbon, hydrogen and oxygen for photosynthetic process, phyto-hormonal, proteomic changes and growth-development of plants to complete its lifecycle. Excessive and inefficient use of N fertilizer results in enhanced crop production costs and atmospheric pollutio...
N bond and shift electron density onto the N2moiety. However, the weakening of the N N bond and the reactivity of the N2ligand do not necessarily correlate.15,16 Side-on/side-on binding is found with group 1–4 metals,lanthanides, and actinides. One complex of this type is [{(thf)3L...
Nitrogen plasma refers to a plasma medium consisting of nitrogen that is used to introduce various chemical functionalities onto a surface, making it more hydrophilic and prone to further reactions. It can create groups such as amine, imine, amide, or nitrile on the surface. ...
Although generally low, soil nitrogen availability can fluctuate greatly in both space and time due to factors such as precipitation, temperature, wind, soil type, and pH. Therefore, the preferred form in which nitrogen is taken up depends on plant adaptation to soil conditions. Generally, plants...
bond-forming step mediated by cupin domain, as we could still detect the production of3(Supplementary Fig.9b). On the other hand, although EDTA appeared to have no effect on the wild-type PyrN (Supplementary Fig.9a), it completely inhibits the N-N forming activity of the H90A and H50A...