Entity

Time filter

Source Type

Poznań, Poland

Revenko M.D.,Moldova State University | Bourosh P.N.,Moldova Academy of Sciences | Stratulat E.F.,Moldova State University | Gdaniec M.,Mickiewicz University | And 3 more authors.
Russian Journal of Inorganic Chemistry | Year: 2010

8-Quinolinecarboxaldehyde thiosemicarbazone (HL) and copper form compounds with a metal: ligand ratio of 1: 1 in which the ligand is either the neutral molecule or the monohydric acid anion. Its acidic properties are enhanced not only as a result of coordination but also due to the electronic effect of substituents in the thiosemicarbazide moiety. 8-Quinolinecarboxaldehyde 4-phenylthiosemicarbazone (HL1) is coordinated only as the anion. The structures of [Cu(HL)SO4]2, [Cu(L)NO3] 2, and [Cu(L1)NO3]2 • 0.25H2O, and free HL1 were studied. The tendency of the complexes to dimerization and association with acid anions or sulfur atoms of the organic ligands as bridges was established. In binuclear compounds with closely spaced magnetic centers, no exchange interaction between them was found. The copper coordination compounds with HL are able to suppress the growth of cancer cells 41M and SK-BR-3 and are promising objects for investigation as anticancer drugs. © 2010 Pleiades Publishing, Ltd. Source


Bourosh P.,Moldova Academy of Sciences | Bologa O.,Moldova Academy of Sciences | Shafranski V.,Moldova Academy of Sciences | Melnic E.,Moldova Academy of Sciences | And 2 more authors.
Russian Journal of Coordination Chemistry/Koordinatsionnaya Khimiya | Year: 2014

Condensation of 3-hydroxyamino-3-methylbutan-2-one with thiosemicarbazide afforded 3-hydroxyamino-3-methylbutan-2-one thiosemicarbazone as a new ligand (H2L). Cobalt(III) and nickel(II) complexes with this ligand were obtained. The molecular formulas and structures of the thiosemicarbazone and the complexes [Co(HL)2]Cl · 2H2O (I) and [Ni(H2L)2]Cl2 · 2.25H2O (II) were confirmed by elemental analysis, IR spectroscopy, and X-ray diffraction (CIF files CCDC nos. 985065 (H2L), 985066 (I), and 985067 (II)). The crystal structures of the ligand H2L and complexes I and II were determined. The way in which the ligand is coordinated to the metal ions, its conformational changes upon the complexation, and the packing patterns in the crystals of H2L, I, and II are discussed. © 2014 Pleiades Publishing, Ltd. Source


Chiobenika O.,Moldova Academy of Sciences | Bourosh P.,Moldova Academy of Sciences | Lozan V.,Moldova Academy of Sciences | Bologa O.,Moldova Academy of Sciences | And 3 more authors.
Russian Journal of Inorganic Chemistry | Year: 2011

New cobalt trans-dioximate complexes with isoniconinamide have been synthesized: [CoII(DmgH)2(Inia)2] (I), [Co III(DmgH)2(Inia)2][PF6] · 1.5H2O (II), [CoIII(NioxH)2 (Inia) 2][PF6] · H2O · CH3OH (III), and [CoIIICl(DmgH)2(Inia)] · H2O (IV), where DmgH- and NioxH- are the dimethylglyoxime and 1,2-cyclohexanedionedioxime monoanions, respectively; Inia is the isonicotinamide molecule. The structures of compounds I-IV have been determined by X-ray crystallography. In I-IV, Co(II) or Co(III) has an octahedral environment with the pseudomacrocyclic (DioxH-)2 moiety (DioxH- is the dioximate monoanion) in the equatorial plane. The latter is stabilized by O-H⋯O hydrogen bonds. The isonicotinamide molecules in all four complexes are monodentately bound to the metal ion through the heterocyclic nitrogen atom. © Pleiades Publishing, Ltd., 2011. Source


Loshak N.V.,Institute for Nuclear Research of Ukraine | Kichanov S.E.,Joint Institute for Nuclear Research | Kozlenko D.P.,Joint Institute for Nuclear Research | Wasicki J.,Mickiewicz University | And 4 more authors.
Journal of Surface Investigation | Year: 2013

The crystalline structure of chlorpropamide is studied by the X-ray diffraction method at high pressures up to 4.2 GPa and in the temperature range 300-450 K. At normal pressure and upon heating to its melting point T = 396 K no phase transitions are found in chlorpropamide. When the initial α form of chlorpropamide is recrystallized, the appearance of a polymorphic ε phase is observed. After recrystallization, the high pressure effect causes partial amorphization of chlorpropamide at pressures of P ∼ 3 GPa. Baric and temperature coefficients are obtained for the α and ε forms of chlorpropamide. © 2013 Pleiades Publishing, Ltd. Source


Choras M.,Institute of Telecommunications | Flizikowski A.,Institute of Telecommunications | Kozik R.,Institute of Telecommunications | Holubowicz W.,Mickiewicz University | Holubowicz W.,ITTI Ltd.
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | Year: 2010

In this paper the innovative methodology based on image/video processing techniques for objective measurements of QoE (Quality of Experience) dedicated for mobile terminals is presented. The proposed methodology has been used to evaluate WWW services offered by mobile operators in Poland. The clear advantages of applying image processing techniques to such a task are objectiveness of the methodology and independence of the underlying network infrastructure. © 2010 Springer-Verlag Berlin Heidelberg. Source

Discover hidden collaborations