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Приказ резултата 11-20 од 1452
A study of HAp/PLLA composite as a substitute for bone powder, using FT-IR spectroscopy
(Elsevier Science Ltd, 2001)
Chemically synthesized hydroxyapatite/poly-L-lactide (HAp/PLLA) composite biomaterial was studied in vivo. The biocomposite was implanted into Balb/c Singen mice and after 1 and 3 weeks removed from their organisms and ...
Pressure drop in a countercurrent gas-flowing solids-packed bed contactor
(American Chemical Society, 2001)
The equations for prediction of pressure drop in countercurrent gas-flowing solids-packed bed contactors are proposed. The correlations are based on all available data for various constructions, packing elements, and gas ...
The kinetics of the partial dehydration of gibbsite to activated alumina in a reactor for pneumatic transport
(Serbian Chemical Society, 2001)
The dehidration kinetics of gibbsite to activated alumina was investigated at four different temperatures between 883 K and 943 K in a reactor for pneumatic transport in the dilute two phase flow regime. The first order ...
Influence of nonparabolicity on tunneling times in semiconductor structures
(Elsevier Science Bv, Amsterdam, 2007)
Tunneling of a particle with energy-dependent effective mass through one-dimensional potential barrier is considered. For an arbitrary potential shape we find general relations between phase, group and dwell times, and ...
Nanostructured sodium niobate obtained by glass crystallization
(Elsevier Science Sa, Lausanne, 2004)
The subject of this work was to obtain nanostructured sodium niobate crystals by a controlled crystallization method from glasses. The glass samples of the composition within the system NaNbO3-SiO2-Al2O3 were prepared by ...
On the thermal decompositions of the trivalent trioxalato complexes of Al, Cr, Mn, Fe and Co
(Springer, Dordrecht, 2001)
The thermal decompositions of the complexes K-3[M(ox)(3)]. 3H(2)O (M=Al, Cr, Mn, Fe, Co; ox=C2O42-) were studied. Dehydration of the complexes occurs up to 200 degreesC, this being a three-step process for M=Al, Cr, Mn and ...
Thermal investigations of CoAPO materials prepared by using piperidine as a structure-directing agent
(Elsevier, Amsterdam, 2000)
Two CoAPO materials (CoAPO-34 and CoAPO-20) with relatively high Co2+/Al3+ substitution level were synthesised in either fluoride-free or fluoride-containing reaction mixture using piperidine as a structure-directing agent. ...
Structural evolution of nanostructured barium titanate thin film sol-gel derived
(Springer, New York, 2008)
Ferroelectric nanostructured barium titanate (BT) thin films derived by a modified sol-gel process were formed by a deep coating method on Si (100) substrate. In this work was investigated the influence of different types ...
Investigations of cell immobilization in alginate: rheological and electrostatic extrusion studies
(Wiley, Hoboken, 2006)
In this study, the process of electrostatic extrusion as a method for cell immobilization was investigated. We have assessed the effects of concentrations of yeast cells (as a model cell type) and Na alginate on the size ...
Oxidative modifications of cellulose in the periodate system - Reduction and beta-elimination reactions
(Walter de Gruyter & Co, Berlin, 2009)
The conversion of cellulose to dialdehyde cellulose (DAC) by treatment with aqueous periodate was studied by the CCOA method, which is a combination of gel permeation chromatography and carbonyl-selective fluorescence ...