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Nanoengineering of inorganic and hybrid composites
(Materials Science Forum, 2000)
The engineering of materials and devices on the nanometer scale is of considerable current interest in electronics, optics, catalysis, ceramics and magnetic storage. Different methodologies of processing that lead to the ...
Mixed ligand Co(II), Ni(II) and Cu(II) complexes containing terephthalato ligands. Crystal structures of diaqua(2,2 -dipyridylamine)(terephthalato)metal(II) trihydrates (metal = cobalt or nickel)
(Polyhedron, 2000)
A series of nine ternary Co(II), Ni(II) and Cu(II) complexes with some aromatic diamines and dianion of terephthalic acid (tpht) have been synthesized and characterized by elemental analysis, magnetic susceptibility ...
Kinetic parameters of some tissue equivalent thermoluminescence materials
(Journal of Physics. D: Applied Physics, 2000)
The paper reports a study on the kinetic parameters of some thermoluminescent tissue equivalent materials recently prepared in Vinca Institute: Li2B4O7:Mn.Si, Li2B4O7:Cu. Li-2 B4O7:Cu,In and MgB4O7:Dy,Na. The kinetics ...
Synthesis of Si3N4-celsian composite materials
(Ceramics International, 2000)
The synthesis of Si3N4-celsian composite materials was studied in this paper. To obtain celsian, two different types of additives were used. In the first case the appropriate mixture of BaCO3, Al2O3 and SiO2 was added to ...
Dispersion hardened Cu-Al2O3 produced by high energy milling
(International Journal of Powder Metallurgy, 2000)
Prealloyed copper powders containing different amounts of aluminum (Cu-1w/oAl, Cu-2.5w/oAl and Cu-3.5w/oAl) were processed in a planetary ball mill to evaluate matrix hardening due to the formation of the formation of Al2O3 ...
A mathematical model of stress reaction: Individual differences in threshold and duration
(Psychobiology, 2000)
People differ in what they experience as stressful and to what extent. We define a variable-stress threshold (sigma)-that links the hypothalamo-pituitary-adrenocortical (HPA) axis and the memory system in a feedback ...
Y-chromosomal diversity in Europe is clinal and influenced primarily by geography, rather than by language
(American Journal of Human Genetics, 2000)
Clinal patterns of autosomal genetic diversity within Europe have been interpreted in previous studies in terms of a Neolithic demic diffusion model for the spread of agriculture; in contrast, studies using mtDNA have ...
Correlation between lipophilicity of the ligands and the hepatobiliary properties of the radiopharmaceuticals: Approach to the development of new IDA derivatives
(Journal of Radioanalytical and Nuclear Chemistry, 2000)
The partition coefficient (log P) for n-octanol/water system was calculated applying PACO program for various theoretically possible mono and dihalogenated IDA derivatives. Some of the synthesized ligands (SOLCOIODIDA, ...
Thermal, oxidative and radiation stability of polyimides I. Bismaleimidoethane and different diamine-based polyimides
(Polymer Degradation and Stability, 2000)
The syntheses of 1,2-ethane-bis-maleamidoacid, N,N-1,2-bis-maleimidoethane (BME), and polyimide resins based on BME and four different diamines are given. The thermal and thermooxidative stability of the resins was studied ...
Selective indicator reaction for kinetic determination of traces of manganese(II), ribavirin and tiazofurin
(Microchimica Acta, 2000)
In this work it was established that, in the presence of ammonium carbonate, traces of manganese(II) catalyse the oxidation of Nile Blue A by hydrogen peroxide, which enables its: kinetic determination in the concentration ...