Претраживање
Приказ резултата 11-20 од 25
Preparation and characterization of Me2O3-CeO2 (Me = B, Al, Ga, In) mixed oxide catalysts. 2. Preparation by sol-gel method
(Amer Chemical Soc, Washington, 2008)
The present work focuses on the combination of ceria mixed with another oxide from group III, using the sol-gel method. B2O3- Al2O3- Ga2O3- or In2O3-CeO2 mixed oxides have been prepared in order to improve the catalytic ...
Influence of mechanical activation on the structure of ultrafine BaTiO3 powders
(Elsevier Science Sa, Lausanne, 2009)
The influence of mechanical activation in a planetary ball mill on the change of the structure of BaTiO3 powders has been investigated. The particle size distribution of the nonactivated and activated samples was measured ...
Preparation and characterization of Me2O3-CeO2 (Me = B, Al, Ga, In) mixed-oxide catalysts
(Amer Chemical Soc, Washington, 2007)
The present work is focused on the synthesis and characterization of ceria-based mixed oxides. Ceria was combined with the other oxides from group III, with the intention of improving the catalytic properties I of thus ...
Nickel-based super-alloy Inconel 600 morphological modifications by high repetition rate femtosecond Ti:sapphire laser
(Cambridge Univ Press, New York, 2009)
The interaction of Ti:sapphire laser, operating at high repetition rate of 75 MHz, with nickel-based super-alloy Inconel 600 was studied. The laser was emitting at 800 nm and ultrashort pulse duration was 160 fs. Nickel-based ...
Resistance of Listeria monocytogenes, Escherichia coli O157:H7 and Campylobacter jejuni after exposure to repetitive cycles of mild bactericidal treatments
(Academic Press Ltd- Elsevier Science Ltd, London, 2009)
While maintaining nutritional and sensorial attributes of fresh foods mild processing technologies generally deliver microbiologically perishable food products. Currently little information exists on possible increase in ...
Effect of N deficiency on leaf growth and cell wall peroxidase activity in contrasting maize genotypes
(Springer, Dordrecht, 2004)
Two maize genotypes differing in leaf elongation rate (high-LER and low-LER) were used for the investigation of the effects of nitrogen deficiency on leaf growth and development and activity of enzyme cell wall peroxidase ...
Electrical properties of screen printed BaTiO3 thick films
(Elsevier Sci Ltd, Oxford, 2004)
The deposition of thick film pastes by screen-printing is a relatively simple and convenient method to produce thicker layers with thickness up to 100 mum. In the present work, the barium titanate thick films were prepared ...
LaMO3 (M = Mg, Ti, Fe) perovskite type oxides: Preparation, characterization and catalytic properties in methane deep oxidation
(Elsevier, Amsterdam, 2008)
Two new series of perovskite-type oxides LaMO3 (M = Mg, Ti, Fe) with different ratio Mg/Fe (MF) and Ti/Fe (TF) in the B cation site were prepared by annealing the precursor, obtained by the mechanochemical activation (MCA) ...
Energy consumption for different greenhouse constructions
(Pergamon-Elsevier Science Ltd, Oxford, 2009)
In this paper the influence of greenhouse construction on energy efficiency in winter lettuce production was estimated for four different double plastic covered greenhouses in Serbia region. Plastic coverings were introduced ...
Species-dependent changes in stomatal sensitivity to abscisic acid mediated by external pH
(Oxford Univ Press, Oxford, 2006)
The direct effects of pH changes and/or abscisic acid (ABA) on stomatal aperture were examined in epidermal strips of Commelina communis L. and Arabidopsis thaliana. Stomata were initially opened at pH 7 or pH 5. The ...