Results 221 to 230 of about 213,618 (247)

The effect of Ni(II) on DNA replication

Biological Trace Element Research, 1989
The cellular regulation of DNA replication is governed in part by the availability of essential metal ions. A continuous supply of Mg(II) ions is necessary for the efficient and faithful replication of parental strands during S-phase as well as during the repair of DNA damage.
N T, Christie, D M, Tummolo
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Oxidation of Ni II to Ni III with nitrosyl tetrafluoroborate

Journal of the Chemical Society D: Chemical Communications, 1970
A new method is reported for preparing some NiIII amine complexes by oxidation of the parent NiII complex with nitrosyl tetrafluoroborate in acetonitrile solution.
E. Kent Barefield, Daryle H. Busch
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Complexes of Co(II) and Ni(II) with selenourea

Bulletin of the Academy of Sciences of the USSR Division of Chemical Science, 1971
1. Compounds of selenourea (Seu) having the composition: Co(NO3)2·4Seu, Ni(NO3)2·4Seu, Ni(NO3)2·4Seu·4C3H6O, were synthesized and isolated in the pure state. 2. By comparing the IR spectra of the free selenourea and the obtained complexes of Co(II) and Ni(II) it was shown that the Seu is coordinated through the selenium atom.
�. V. Khlystunova, I. M. Cheremisina, V. L. Varand, V. M. Shul'man   +3 more
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Ferro- and antiferromagnetic interactions in face-sharing trioctahedral Ni^IIMn^IINi^IIand Ni^IIFe^IIINi^IIcomplexes with the same 1–5/2–1 spin system

Chem. Commun., 2006
Two heterotrinuclear complexes, [Mn(II)(Ni(II)L)2].2CH3OH (where H3L = 1,1,1-tris(N-salicylideneaminomethyl)ethane) and [Fe(III)(Ni(II)L)2]NO3.C2H5OH, consisting of three face-sharing octahedra have been prepared; although these complexes have closely related structures and have the same 1-5/2-1 spin system, they show completely different magnetic ...
KOBAYASHI T, YAMAGUCHI, T, OHTA H, SUNATSUKI Y, KOJIMA M, RE, Nazzareno, NONOYAMA M, MATSUMOTO N.   +7 more
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?????????????????????? ???????????????????? ?????????? Ni (II) ?? ?????????????????????????????? ?????????????????????????????? ???? ???????????? ???????????????????????? ???????????????? ???? ???????????????????????? ??????????????????

2022
Ion-exchange equilibrium process on the inorganic ion exchanger based on zirconium hydrophosphate (ZHP) with compare to organic acid ion exchanger Dowex-0X2 has been studied. It was found that presence of Ca (II) and Mg (II) ions have no influence on sorption activity of inorganic ion exchanger to Ni (II) ions.
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Insertion of Ni(I) into Porphyrins at Room Temperature: Preparation of Ni(II)porphyrins, and Ni(II)chlorins and Observation of Hydroporphyrin Intermediates

Inorganic Chemistry, 2018
Reduced Nickel porphyrins play an important role as enzymatic cofactors in the global carbon cycle (cofactor F430), and as powerful catalysts in solar-to-fuel-processes such as the hydrogen evolution reaction, and the reduction of CO and CO2. The preparation of Ni(II)porphyrins requires harsh conditions, and characterization of the reduced species is ...
Morten K. Peters, Rainer Herges
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New Ni^IICu^IINi^II and Ni^IICo^IINi^II trinuclear complexes with macrocyclic oxamido ligands

Journal of Coordination Chemistry, 2009
New trinuclear complexes [Cu(NiL1)2(C2H5OH)2](ClO4)2 (1) and [Co(NiL2)2(H2O)2](ClO4)2 ·2(H2O) (2) were prepared using macrocyclic complex ligands with excess Cu(ClO4)2 · 6(H2O) and Co(ClO4)2 · 6(H2O), respectively, and characterized by X-ray crystallography.
Peng-Peng Hao, Shang-Hao Li, Xiao-Zeng Li, Li-Na Zhu   +3 more
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Catalytic Ni(II) in Reactions of SmI₂: Sm(II)- or Ni(0)-Based Chemistry?

Journal of the American Chemical Society, 2011
The addition of catalytic amounts of Ni(II) salts provide enhanced reactivity and selectivity in numerous reactions of SmI(2), but the mechanistic basis for their effect is unknown. We report spectroscopic and kinetic studies on the mechanistic role of catalytic Ni(II) in the samarium Barbier reaction. The mechanistic studies presented herein show that
Kimberly A, Choquette, Dhandapani V, Sadasivam, Robert A, Flowers   +2 more
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Untersuchungen des Ni(II)‐Quercetin‐Komplexes Investigation of the Complex of Ni(II) and Quercetin

Archiv der Pharmazie, 1987
AbstractBislang wurden viele Komplexverbindungen, die Flavone mit Metallionen bilden, untersucht. Hier wird der Ni(II)‐Quercetin‐Komplex in 50proz. EtOH bei pH=5.0, 20° und der Ionenstärke 0.015 untersucht. Es bildet sich ein gelbgrüner Komplex, dessen Absorptionsspektrum ein Maximum bei 436 nm zeigt.
Zorica Radović, Dušan Malešev
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Spectrophotometric Study of 2‐Oximinodimedone Dithiosemicarbazone‐ni(II) complex. Determination of ni(II)

Bulletin des Sociétés Chimiques Belges, 1986
AbstractThe spectrophotometric study of the orange 2‐oximinodimedone dithiosemicarbazone‐Ni(II) complex was made in dimethylformamide‐water solution (ϵ 440 nm=7200 l. mol−1. cm−1; stoichiometry 2:1 reagent to Ni(II) and apparent stability constant 1.0x106).
F. Salinas, J. C. Jiménez Sánchez, J. L. Lemus   +2 more
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