The enantiopure agents d- and l-leucine, selectively bind RR and SS enantiomers from a racemate [Ni(alpha-rac-L)](2+) to give {[Ni(RR-L)(d-HLeu)](ClO(4))(2)}(n) (Delta-) and {[Ni(SS-L)(l-HLeu)](ClO(4))(2)}(n) (Lambda-), respectively, and leave the corresponding uninteracted SS and RR enantiomers of [Ni(alpha-SS-L)](ClO(4))(2) (S-) and [Ni(alpha-RR-L)](ClO(4))(2) (R-). Occasionally, a few crysta...

Nickel plays a central role as an enzyme co-factor in the metabolism of methanogenic Archaea. Methanogens can fractionate Ni isotopes during assimilation, opening the possibility of using the stable isotopic composition of Ni as a biomarker. However, other sources of Ni isotopic variations need to be evaluated before one can establish Ni isotopes as an unambiguous tracer of methanogenesis in th...

A study has been presented on the effects of intrinsic mechanical parameters, such as surface stress, surface elastic modulus, surface porosity, permeability and grain size on the corrosion failure of nanocomposite coatings. A set of mechano-electrochemical equations was developed by combining the popular Butler-Volmer and Duhem expressions to analyze the direct influence of mechanical paramete...

The synthesis, characterization and the biological study of a series of Ni(ll)(2)(carboxylato)(2) [12- MC(Ni(II)N(shi)2(pko)2)-4][12-MC(Ni(ii)N(sh03(pko))-4] (CH(3)OH)(3)(H(3)O) fused 12-membered metallacrowns with 10 metal ions and commercial available herbicides or anti-inflammatory drugs as carboxylato ligands are reported. All the compounds have a mixed ligand composition with salicylhydrox...

Ni-based superalloys are the important materials for gas turbines in advanced aeroplane engines . The addition of refractory elements to these superalloys, such as rhenium and tungsten, can significantly improve the hightemperature performance by so-called solid-solution hardening. Although the strengthening effect of refractory elements in Ni-based superalloys have been known for a long time, ...

The three-coordinate Ni(I) complex Ni(Cl)(P(2)), where P(2) is the diphosphine (iPr)DPDBFphos, reacts with the acids HCl·(dioxane) and 2,6-lutidinium chloride to generate Ni(H)(Cl)(P(2)) and Ni(Cl)(2)(P(2)). Photolysis of the Ni(H)(X)(P(2)) (for X = Cl, Br) results in formation of H(2) and the Ni(I) halide. This reaction also proceeds in reverse when heated.