Buscar
Mostrando ítems 31-40 de 7554
A PEACH STONE ACTIVATED CARBON CHEMICALLY MODIFIED TO ADSORB AQUEOUS AMMONIA
(Sociedad Chilena de Química, 2003)
Preparation of 9.5/65/35 PLZT powders by organic precursor method
(2001-01-01)
In this study the preparation of 9.5/65/35 PLZT ceramic powders were investigated. The powders with the formula Pb0.905La0.095(Zr0.65 Ti0.35)0.976O3 + 3.5 w% PbO were prepared using Pechini process and partial oxalate ...
EFFECT OF TREE AGE ON VARIATION OF PINUS RADIATA D. DON CHEMICAL COMPOSITION
(Sociedad Chilena de Química, 2004)
NMR chemical shielding and spin-spin coupling constants of liquid NHȝ: a systematic investigation using the sequential QM/MM method
(American Chemical Society, 2009-09)
The NMR spin coupling parameters, ¹J(N,H) and ²J(H,H), and the chemical shielding, σ(15N), of liquid ammonia are studied from a combined and sequential QM/MM methodology. Monte Carlo simulations are performed to generate ...
A simple and fast sampling method for chemical analyses and densitometry of bones through rib biopsies in cattle
(2017-01-01)
We developed and evaluated a fast and simple method to obtain suitable bone samples for densitometry and chemical analysis through biopsies of the 12th rib of cattle. The postoperative recovery, dry matter intake (DMI) and ...
Modeling of syngas composition obtained from fluidized bed gasifiers using Kuhn–Tucker multipliers
(2018-06-01)
This work aims to develop a modified chemical equilibrium model to accurately determine the syngas (synthesis gas) composition obtained from fluidized bed gasifiers. In order to do so, an optimization method was applied ...
Nuclear magnetic resonance shielding constants and chemical shifts in linear 199Hg compounds: A comparison of three relativistic computational methods
(American Institute of Physics, 2011-07)
We investigate the importance of relativistic effects on NMR shielding constants and chemical shifts of linear HgL2 (L = Cl, Br, I, CH 3) compounds using three different relativistic methods: the fully relativistic ...
Dielectric properties of soft chemical method derived CaCu3Ti4O12 thin films onto Pt/TiO2/Si(100) substrates
(Elsevier B.V. Sa, 2011-03-03)
Calcium copper titanate, CaCu3Ti4O12 (CCTO), thin film has been deposited by the soft chemical method on Pt/Ti/SiO2/Si (1 0 0) substrates at 700 degrees C for 2 h. The peaks were indexed as cubic phase belonging to the ...
Structural and dielectric properties of Ba0.5Sr0.5(SnxTi1-x)O-3 ceramics obtained by the soft chemical method
(Elsevier B.V. Sa, 2009-05-27)
Ba0.5Sr0.5(SnxTi1-x)O-3 ceramics with different compositions (x = 0, 0.05, 0.10 and 0.20) were synthesized by the soft chemical method. X-ray diffraction patterns and Rietveld refinements revealed that these ceramics ...
Use of Near Infrared Reflectance (NIR) Spectroscopy to Predict Chemical Composition of Forages in Broad-Based Calibration Models
(Instituto de Investigaciones Agropecuarias, INIA, 2006)