Претраживање
Приказ резултата 21-30 од 209
Experimental design approach in the synthesis of hydroxyapatite by neutralization method
(Elsevier, Amsterdam, 2005)
Physicochemical properties of hydroxyapatite (HAP) synthesized by neutralization method are heavily dependent on the process variables. A Plackett-Burman two-level experimental design was therefore, chosen to screen a large ...
Cooler for obtaining crystals in a crucible furnace
(Int Union Crystallography, Chester, 2003)
Swelling and paracetamol release studies of poly(acrylamide-co-itaconic acid) hydrogels
(Elsevier, Amsterdam, 2005)
Optimization of artificial neural network for retention modeling in high-performance liquid chromatography
(Elsevier, Amsterdam, 2004)
An artificial neural network (ANN) model for the prediction of retention times in high-performance liquid chromatography (HPLC) was developed and optimized. A three-layer feed-forward ANN has been used to model retention ...
Methanol electrooxidation on supported Pt and PtRu catalysts in acid and alkaline solutions
(Pergamon-Elsevier Science Ltd, Oxford, 2002)
The kinetics of methanol oxidation on supported 47.5 wt.% Pt and 54 wt.% Pt-Ru (with nominal Pt:Ru ratios of 2:3) catalysts are measured in 0.5 M H2SO4 and 0.1 NaOH at 295 and 333 K using thin-film rotating disk electrode ...
Dependence of slip velocity on operating parameters of air-lift bioreactors
(Elsevier Science Sa, Lausanne, 2007)
In this study we analyzed the quality of local mixing in external loop air-lift bioreactors for two hydrodynamic regimes in terms of slip velocity. In particular. the effects of design and operating parameters (e.g., reactor ...
Densities and excess molar volumes of the ternary mixture 2-butanol plus chloroform plus benzene and binary mixtures 2-butanol plus chloroform, or plus benzene over the temperature range (288.15 to 313.15) K
(Amer Chemical Soc, Washington, 2008)
Densities rho and excess molar volumes V(E) of the 2-butanol + chloroform + benzene ternary mixtures and two binaries, 2-butanol + chloroform and 2-butanol + benzene, have been determined. Experimental rho measurements ...
Electrothermal desorption in an annular-radial flow - ACFC adsorber - Mathematical modeling
(Springer, New York, 2005)
A mathematical model of an annular, radial-flow adsorber with the possibility of electroresistive heating of the adsorbent bed has been postulated. The model consists of a set of coupled nonlinear PDEs, ODEs and algebraic ...
Synthesis and characterization of biodegradable aliphatic copolyesters with poly(ethylene oxide) soft segments
(Elsevier Ltd, 2008)
A series of multiblock poly(ether-ester)s based on poly(butylene succinate) (PBS) as the hard segments and hydrophilic poly(ethylene oxide) (PEO) as the soft segments was synthesized with the aim of developing degradable ...
Solid-state NMR study of an open-framework aluminophosphate-oxalate hybrid
(Amer Chemical Soc, Washington, 2003)
Short-range order within a novel aluminophosphate-oxalate hybrid material with the unit cell formula CH2(NH3)CH(NH3)CH3Al4P6O20(OH)(4)(C2O4)H2O was studied by multinuclear solid-state NMR measurements. The C-13, Al-27, and ...