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    Wyświetlanie 1-7 z 7
    Tytuł:
    MHD Supported Electroreduction of Formate Nickel Complexes with Simultaneous Incorporation of TiO2 Particles
    Autorzy:
    Mech, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/356370.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    electrodeposition
    Ni-TiO2 composites
    composite coatings
    MHD effect
    Opis:
    The present work concerns analysis of the possibilities of synthesis of Ni-TiO2 composite coatings from electrolytes containing formate nickel complexes. A magnetic field was applied as an additional factor enabling modification of properties of the synthesized coatings through its influence on electrode processes. The presented data describes the effect of electrode potential, TiO2 concentration in the electrolyte as well as the value of the magnetic field induction vector on the deposition rate, composition, current efficiency, structure, surface states and morphology of synthesized coatings. The studies were preceded by thermodynamic analysis of the electrolyte. The obtained results indicated possibilities of synthesis of composites containing up to 0.97wt.% of TiO2. Depending on applied electrolysis conditions current efficiency amounted to from 61.2 to 75.1%.
    Źródło:
    Archives of Metallurgy and Materials; 2020, 65, 1; 219-227
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The effects of nickel(II) complexes with imidazole derivatives on pyocyanin and pyoverdine production by Pseudomonas aeruginosa strains isolated from cystic fibrosis
    Autorzy:
    Gałczyńska, Katarzyna
    Kurdziel, Krystyna
    Adamus-Białek, Wioletta
    Wąsik, Sławomir
    Szary, Karol
    Drabik, Marcin
    Węgierek-Ciuk, Aneta
    Lankoff, Anna
    Arabski, Michał
    Powiązania:
    https://bibliotekanauki.pl/articles/1038905.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    Pseudomonas sp.
    cystic fibrosis
    nickel complexes
    pyocyanin
    pyoverdine
    Opis:
    Pseudomonas aeruginosa infection is problematic in patients with cystic fibrosis (CF). P. aeruginosa secretes a diversity of pigments, such as pyocyanin and pyoverdine. The aim of this study was to evaluate the effects of complexes of nickel(II) ([Ni(iaa)2(H2O)2]·H2O (iaa = imidazole-4-acetate anion), [Ni(1-allim)6](NO3)2 (1-allim = 1-allylimidazole) and NiCl2 on pyocyanin and pyoverdine production by 23 strains of P. aeruginosa isolated from cystic fibrosis under growth conditions specific for the CF respiratory system. The antibacterial effects and biophysical properties of the tested substances were measured by spectrofluorometric techniques, as well as by laser interferometry, confocal and atomic force microscopy. The cytotoxic properties of all compounds were measured by Annexin/IP assay against A549 cells. All tested compounds have no effect on pyocyanin production and decrease the pyoverdine secretion in about 40% of tested P. aeruginosa strains at non-cytotoxic range of concentrations. Imidazole-4-acetate anion and 1-allylimidazole have good diffusion properties in the mature P. aeruginosa PAO1 biofilm. In conclusion, the tested nickel(II) complexes do not have clinical implications in P. aeruginosa eradication in cystic fibrosis. The diffusion properties of 1-allylimidazole and imidazole-4-acetate and their lack of effect on A549 cells suggest that they might be considered for chemical synthesis with other transition metals.
    Źródło:
    Acta Biochimica Polonica; 2015, 62, 4; 739-745
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Cytogenetic toxicity effects of inorganic nickel and organic Ni[II] complexes on Brassica oleracea L. root meristem
    Autorzy:
    Molas, J
    Powiązania:
    https://bibliotekanauki.pl/articles/2041800.pdf
    Data publikacji:
    2001
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    organic nickel
    mitosis
    metal ion
    root meristem
    inorganic nickel
    cytotoxicity
    cabbage
    genotoxicity
    stress tolerance
    cytogenetic toxicity
    plant biology
    Brassica oleracea
    heavy metal
    Źródło:
    Journal of Applied Genetics; 2001, 42, 3; 257-268
    1234-1983
    Pojawia się w:
    Journal of Applied Genetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Nickel (II) Schiff Base Complexes as Stationary Phases in Gas Chromatography
    Wykorzystanie kompleksów Ni (II) z zasadami Schiffa jako faz stacjonarnych w chromatografii gazowej
    Autorzy:
    Masłowska, Joanna
    Bazylak, Grzegorz
    Powiązania:
    https://bibliotekanauki.pl/articles/944839.pdf
    Data publikacji:
    1988
    Wydawca:
    Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
    Opis:
    The possibility of separating some alkanes or alcohols mixture by gas chromatography in a packed columns with tetradentate Schiff base nickel (II) complexes has been studied. The effects of modification in the chelate structure on the column selectivity are presented comparing the appropriate heats of adsorption.
    Badania nad zastosowaniem różnych kompleksów metali przejściowych z dwu- i czterokleszczowymi zasadami Schiffa wykazały, że związki te spełniają wymagania stawiane fazom stacjonarnym stosowanym w chromatografii gazowej.
    Źródło:
    Acta Universitatis Lodziensis. Folia Chimica; 1988, 8
    0208-6182
    Pojawia się w:
    Acta Universitatis Lodziensis. Folia Chimica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Metal-glutathione interaction in aqueous solution. Nickel(II), cobalt(II) and copper(II) complexes with oxidized glutathione
    Autorzy:
    Formicka-Kozłowska, Grażyna
    Kozłowski, Henryk
    Jeżowska-Trzebiatowska, Bogusława
    Powiązania:
    https://bibliotekanauki.pl/articles/1046214.pdf
    Data publikacji:
    1979
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Źródło:
    Acta Biochimica Polonica; 1979, 26, 3; 239-248
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    In situ thermal decomposition route: Preparation and characterization of nano nickel, cobalt, and copper oxides using an aromatic amine complexes as a low-cost simple precursor
    Autorzy:
    Refat, Moamen S.
    Mohamed, Soha F.
    Altalhi, Tariq A.
    Bakare, Safyah B.
    Al-Hazmi, Ghaferah H.
    Powiązania:
    https://bibliotekanauki.pl/articles/1849310.pdf
    Data publikacji:
    2021
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    o-tolidine
    NiO
    Co3O4
    CuO
    XRD
    TEM
    nanoparticles
    complexation
    Opis:
    The main interest now is the development of metallic or inorganic-organic compounds to prepare nanoparticle materials. The use of new compounds could be beneficial and open a new method for preparing nanomaterials to control the size, shape, and size of the nanocrystals. In this article, the thermal decomposition of [M2(o-tol)2(H2O)8]Cl4 (where o-tol is ortho-tolidine compound, M = Ni2+, Co2+, Cu2+) new precursor complex was discussed in solid-state conditions. The thermal decomposition route showed that the synthesized three complexes were easily decomposed into NiO, Co3O4 and CuO nanoparticles. This decomposition was performed at low temperatures (~600°C) in atmospheric air without using any expensive and toxic solvent or complicated equipment. The obtained product was identified by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), transmission electron microscopy (TEM) and energy-dispersive X-ray spectroscopy (EDX). FT-IR, XRD and EDX analyses revealed that the NiO nanoparticles exhibit a face-centered-cubic lattice structure with a crystallite size of 9–12 nm. The formation of a highly pure spinel-type Co3O4 phase with cubic structure showed that the Co3O4 nanoparticles have a sphere-like morphology with an average size of 8–10 nm. The XRD patterns of the CuO confirmed that the monoclinic phase with the average diameter of the spherical nanoparticles was approximately 9–15 nm.
    Źródło:
    Polish Journal of Chemical Technology; 2021, 23, 2; 47-53
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wybrane właściwości fizykochemiczne polikarboksylanowych związków kompleksowych kobaltu(II), niklu(II), miedzi(II) i oksowanadu(IV)
    Selected physicochemical properties of polycarboxylate cobalt(II), nickel(II), copper(II) and oxidovanadium(IV) complex compounds
    Autorzy:
    Piotrowska-Kirschling, A.
    Drzeżdżon, J.
    Chmurzyński, L.
    Jacewicz, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/171735.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Chemiczne
    Tematy:
    polikarboksylanowe związki kompleksowe
    kinetyka
    metoda stopped-flow
    właściwości antyoksydacyjne
    woltamperometria cykliczna
    polycarboxylate complexes
    kinetics
    stopped-flow method
    antioxidant activity
    cyclic voltammetry
    Opis:
    Cobalt(II), nickel(II), copper(II) and oxidovanadium(IV) cations are coordination centers in many polycarboxylate complexes [1‒16]. A number of coordination compounds of transition metal ions with such ligands as polycarboxylate anions and heterocyclic organic ligands, e.g. 1,10-phenanthroline (phen) or 2,2’-bipyridine (bipy) have been examined for their biological properties [3‒16]. Their selected structures and physicochemical properties have been described in the first chapter. The polycarboxylate coordination compounds of cobalt(II), nickel(II), copper(II) and oxidovanadium(IV) have interesting antioxidant, antibacterial and antifungal activities. The antioxidant properties of polycarboxylate complexes of Co(II), Ni(II), Cu(II) and VO(IV) with 4-picoline, 1,10-phenanhroline and 2,2’-bipyridine have been investigated towards the superoxide anion radical using the nitro blue tetrazolium chloride (NBT) test and the cyclic voltammetry (CV). Their antibacterial and antifungal activities have been tested against bacteria and fungus strains that are antagonistic to the human. The determined biological properties of the oxydiacetate Co(II), Ni(II), VO(IV) complexes with bipy/phen, the thiodiacetate VO(IV) and the iminodiacetate Cu(II) complexes have been compared with these of L-ascorbic acid, which is chemical compounds commonly used as the reference antioxidant substance. Consequently, the comparison of antioxidant properties of selected cobalt( II), nickel(II), copper(II) and oxidovanadium(IV) polycarboxylate compounds is described in this work (Section 3, Tab. 1‒4). The kinetics of substitution reactions of selected copper(II) polycarboxylate complex compounds were monitored using the stopped-flow method in various reaction conditions (concentration of complex, temperature, solvent) (Rys. 5‒6) [5, 6]. The obtained results of the kinetic studies of the substitution reactions of [Cu(tda)]n with 2,2’-bipyridine in aqueous surfactants solvents: sodium dodecyl sulfate (SDSaq) and hexadecyl trimethyl- ammonium bromide (CTABaq) at 298.15 K (25 °C) are presented.
    Źródło:
    Wiadomości Chemiczne; 2018, 72, 11-12; 797-814
    0043-5104
    2300-0295
    Pojawia się w:
    Wiadomości Chemiczne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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