A new analytical approach for the detection of Ni2+ utilizing an attenuated total reflection (ATR) technique is discussed in this paper. Nickel detection was accomplished on a silicon ATR parallelogram crystal uniformly coated by a ca. 1.5-microm Nafion film embedded with dimethylglyoxime (DMG) probe molecules. The detection of Ni2+ is based on the appearance of a unique infrared absorption pea...

The blocking actions of Fe2+, Co2+, and Ni2+ on unitary currents carried by Ba2+ through single dihydropyridine-sensitive Ca2+ channels were recorded from cell-attached patches on myotubes from the mouse C2 cell line. Adding millimolar concentrations of blocker to patch electrodes containing 110 mM BaCl2 produced discrete excursions to the closed channel level. The kinetics of blocking and unbl...

BACKGROUND/OBJECTIVE Lipopolysaccharides (LPS) promote allergic responses to nickel (Ni) both in the sensitization and elicitation steps. In this study, we examine the effect of pre-sensitization to LPS on the occurrence of Ni allergy using a mouse model. METHOD A 100 mg of LPS was injected into C57BL/6J mice intraperitoneally (ip). Three weeks later, the mice were subsequently injected with ...

In CRYPTO 1999, J. An and M. Bellare proposed a MerkleDamg̊ard iteration based MAC construction called NI-MAC in order to avoid constant re-keying on multiblock messages in NMAC and to ease the security proof. In CRYPTO 2014, Gazi et al. revisited the proof of NI-MAC in the view of structure graph introduced by Bellare et al. in CRYPTO 2005 and gave a tight bound of order lq 2 2n , which is an i...

The effect of metal activators on the fidelity of DNA synthesis has been examined. Using the DNA polymerase from avian myeloblastosis virus, the accuracy of Co2+-, M2+-, and Ni2+-activated DNA synthesis was determined with different polynucleotide templates. With poly[d(A-T)] as the template, the error frequency for dCMP incorporation was 1:1400, 1:1100, and 1:600 for Mg2+, Co2+, and Mn2+, resp...

The catalytic activity of natural and synthetic zeolites modified by ion exchange with cations Ni2+, Zn2+, Cu2+, Co2+, Bi2+ Pd2+ in the reaction propylene oxidative conversion molecular oxygen to acrolein was studied. Based on experimental data, it found that clinoptilolite Ni2+ cation exhibits highest selectivity question. conditions were studied

The decoration of iron oxide nanoparticles with Ni2+ ions provided the superparamagnetic nanoparticles with a binding site for His-tagged proteins, allowing their selective binding and convenient separation from a multi-component solution with an appropriately applied magnetic field.

Ferromagnetism with T(c)>350 K is observed in the diluted magnetic semiconductor Ni(2+):ZnO synthesized from solution. Whereas colloidal Ni(2+):ZnO nanocrystals are paramagnetic, their aggregation gives rise to robust ferromagnetism. The appearance of ferromagnetism is attributed to the increase in domain volumes and the generation of lattice defects upon aggregation. The unusual temperature de...

ni2+ supported on hydroxyapatite-core@shell γ-fe2o3 nanoparticles (γ-fe2o3@hap-ni2+) was found to be a useful catalyst for the synthesis of benzimidazole derivatives from o-phenylenediamine and aldehydes under solvent and solvent-free conditions at 80 °c. this reaction affords the corresponding benzimidazole derivatives compared with the classical reactions this method consistently gives a high...

Ni-H-Beta catalysts for ethylene oligomerization (EO) were prepared by ion exchange of NH4-Beta and H-Beta zeolites with aqueous Ni(NO3)2 characterized H2-temperature-programmed reduction (TPR), NH3-temperature-programmed desorption (TPD), diffuse-reflectance infrared Fourier-transform spectroscopy (DRIFTS). Quadruple at 70 °C resulted in 2.5 wt.% Ni loading corresponding to a Ni2+/framework al...