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Mirza Rosca J.C.,University of Las Palmas de Gran Canaria | Herrera E.D.,University of Las Palmas de Gran Canaria | Santana Lopez A.,University of Las Palmas de Gran Canaria | Vasilescu E.,Institute of Physical Chemistry of Romanian Academy | Drob P.,Institute of Physical Chemistry of Romanian Academy
Metalurgia International | Year: 2011

Recently, it was found that titanium oxide with specific structure of anastase and rutile possesses a high bioactive characteristic; this result implies the possibility of preparation of more active titanium by heat treatment in oxygen atmosphere. In this paper, Ti-6Al-7Nb with heat treatment was compared with Ti-6Al-7Nb without heat treatment in order to compare the surface characteristics and the mechanical properties. Data about mechanical behaviour are presented. The mechanical behaviour was determined using optical metallography, Scanning Electron Microscopy, Tensile strength and ultramicrohardness. It resulted that the tested oxide films presented passivation tendency and a very good stability. The pronounced porous oxide layer obtained by heat treatment may be expected to facilitate the incorporation of mineral ions from biological fluids and to improve the bioactive bonding with the living bone. Source

Zamfir G.,Technical Collegium Mircea Eel Batran | Stanica N.,Institute of Physical Chemistry of Romanian Academy | Draghici C.,Institute of Organic Chemistry of the Romanian Academy | Rusu E.,Petru Poni Institute of Macromolecular Chemistry | Kriza A.,University of Bucharest
Revista de Chimie | Year: 2012

Transitional metal complexes, by template synthesis, with the ligand, 2-hydroxy-1- naphthalidene-2-mercaptoaniline, (H 2L), type: [M (HL) 2]. nH 2O, where M= Zn (II) and n = 0 and M = Ni (II), Cd (II) and n=1, type[M(H 2L)X 2]'. nH 2O, where M = Cu(II), X = NO 3, n = 0 and type[M(HL) 3]. nH 2O where M=Co(III) and n=0 were optained. Complexes were characterized using various physico-chemical methods such as: elemental analysis, IR, UV-Vis, 1H-NMR , 13C-NMR spectroscopy, electric conductivity and magnetic susceptibility. The ions Cu (II), Zn (II) and Cd (II) have tetrahedral geometry, Ni (II) are square- planar and Co(III) have octahedral geometry. Ligand act as NO bidentate monoanionic for Co (III), Ni (II), Zn (II) and Cd (II) ions and as NO bidentate neutral for Cu (II) ions. Source

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