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Приказ резултата 31-40 од 1452
Thermal deamination kinetics of the nickel-containing chabazite-like aluminophosphate, Ni(NH2-CH2-CH2-NH2)(2)(AlPO4)(6)(OH)(2), deposition of nanocrystalline NiO particles
(Elsevier Science Sa, Lausanne, 2009)
Thermogravimetrical analysis has been used to study the kinetics of thermal deamination of bis(ethylenediamine) nickel(II)-containing aluminophosphate (Ni-CHA) which is a precursor of nickel(II)-containing chabazite-like ...
Fractal approach to ac impedance spectroscopy studies of ceramic materials
(Kluwer Academic Publ, Dordrecht, 2001)
A novel fractal model for grain boundary regions of ceramic materials was developed. The model considers laterally inhomogeneous distribution of charge carriers in the vicinity of grain boundaries as the main cause of the ...
A kinetic study of the thermal degradation of cetyltrimethylammonium bromide inside the mesoporous SBA-3 molecular sieve
(Elsevier Science Bv, Amsterdam, 2008)
Thermal degradation of cetyltrimethylammonium bromide (CTMAB) inside the mesoporous SBA-3 has been studied under non-isothermal conditions. There are two distinct although partly overlapping kinetic processes, and both of ...
Determination of carbendazim residues in fruit juices by liquid chromatography-tandem mass spectrometry
(Taylor & Francis, 2005)
In this paper a rapid optimized method for routine analysis of carbendazim residues in fruit juices is reported. The procedure is based on matrix solid-phase dispersion (MSPD) with diatomaceous earth and analysis of the ...
A kinetic study of the thermal degradation of ammonium species inside a 3D zincophosphate
(Elsevier Science Bv, Amsterdam, 2006)
Ammonium ions remain inside the 3D zincophosphate framework after the hydrothermal crystallization. These species in co-operation with sodium cations exert a specific templating role in the formation of the open-framework ...
Two new examples of very short thallium-transition metal contacts: Tl(3)Ag(3)Sb(2)S(6) and Tl(3)Ag(3)As(2)S(6)
(Elsevier Science Sa, Lausanne, 2008)
Two new sulphosalts Tl(3)Ag(3)Sb(2)S(6), (1) and Tl(3)Ag(3)AS(2)S(6), (2) were prepared in reaction of synthetic binary sulfides: argentite (Ag(2)S), carlinite (Tl(2)S) and orpiment (As(2)O(3)) or stibnite (Sb(2)S(3)), and ...
Conformation of N-substituted 2-phenylbutanamides / Konformacije N-supstituisanih 2-fenilbutanamida
(Univerzitet u Nišu, Niš, 2000)
Various N-substituted 2-phenylbutanamides, CH3CH2CH(Ph)CONHR, where R is ethyl, n-butyl, i-butyl, cyclohexyl and phenyl, were synthesized. They were characterized by m.p., FT-IR, 1H NMR and mass spectra. Depending on the ...
Operating regime of a biphasic oil/aqueous hollow-fibre reactor with immobilized lipase for oil hydrolysis
(Elsevier Sci Ltd, Oxford, 2004)
Lipase from Candida rugosa was immobilized on Cuprophane membrane in a hollow-fibre module for possible application for oil hydrolysis. A simple immobilization technique was applied and 154.8 mg m(-2) lipase was immobilized ...
Adsorption of oxygen containing species and their effect on oxygen reduction on Pt3Co electrode
(Elsevier Science Sa, Lausanne, 2003)
A rotating Pt3Co, thermally prepared alloy disc is used to study electrochemical oxygen reduction in alkaline solutions of different pH. In all solutions two Tafel regions are found: at low current densities partial ...
Remediation of environment contaminated by lead using synthetic and natural apatites / Stabilizacija zagađenja olovom korišćenjem sintetičkih i prirodnih apatita
(Association of Chemical Engineers of Serbia, 2001)
Lead contamination is an environmental concern due to its effect on human health. One of the ways of remediating lead contamination is the in situ stabilization of this heavy metal. This can be achieved by converting ...