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Evaluation of hydrogen transfer in FCC catalysts. A new approach for cyclohexene as a test reactant
(Elsevier, 2000-02)
The conversion of cyclohexene over different commercial FCC catalysts in a batch fluidized-bed reactor under very short contact times at 300°C, was described by means of a simple lumped kinetic model that accounted for the ...
A Comparison of the SAO-Hipparcos reference frames
(EDP Sciences, 2000-12)
The reference systems defined by the SAO and Hipparcos catalogues are compared using vector spherical harmonic analysis. The differences between astrometric data in both catalogues have been grouped into different data ...
An adaptive feedback linearization strategy for variable speed wind energy conversion systems
(John Wiley & Sons Ltd, 2000-02)
This paper presents a control strategy based on adaptive feedback linearization intended for variable speed grid‐connected wind energy conversion systems (WECS). The proposed adaptive control law accomplishes energy capture ...
Stable inflationary dissipative cosmologies
(World Scientific, 2000-06)
The stability of the de Sitter era of cosmic expansion in spatially curved homogeneous isotropic universes is studied. The source of the gravitational field is an imperfect fluid such that the parameters that characterize ...
Regeneración de plantas de aguaí (Chrysophyllum gonocarpum, Sapotaceae) por cultivo in vitro de segmentos nodales
(Fundación Romulo Raggio, 2000-12)
Fueron cultivados in vitro segmentos nodales de aguaí (Chrysophyllum gonocarpum) de: a) árboles adultos (5 y 15 años de edad); b) brotes epicórmicos de tallos leñosos de árboles de 15 años de edad obtenidos mediante brotación ...
Isolation and identification of xylitol-producing yeasts from agricultural residues
(Springer, 2000-12)
Selected yeast strains isolated from corn silage and viticulture residues were sceened for their capacities to convertd-xylose into xylitol. A conventional TLC was adapted for easy determination of xylose and xylitol in ...
Latex Particle Size Distribution through Single-Angle Dynamic Light Scattering. Computer Evaluation of Two Alternative Calculation Paths
(Academic Press Inc Elsevier Science, 2000-12)
Two calculation paths for estimating the particle size distribution (PSD) of a polymer latex from single-angle dynamic light scattering (DLS) measurements are evaluated on the basis of a numerical example. In the more ...
Epoxy/anhydride networks modified by epoxy/anhydride oligomers containing SiOH groups
(John Wiley & Sons Inc, 2000-02-07)
Epoxy/anhydride oligomers containing variable amounts of trialkoxysilane groups were synthesized from phenyl glycidyl ether (PGE), 3-glycidoxypropyl trimethoxysilane (GPMS), and methyl tetrahydrophthalic anhydride (MTHPA), ...
Energy and Electron Transfer Quenching of Porphyrins by C60
(American Chemical Society, 2000-10)
Energy- and electron-transfer from porphyrins in the triplet excited state to C60 in toluene and benzonitrile has been studied with Fourier transform EPR (FT-EPR). Pulsed-laser excitation of the systems magnesium ...
Dynamics in Restructuring Active Regions Observed During Soho/Yohkoh/Gbo Campaigns
(Elsevier, 2000-01)
JOP17 and JOP 33 are SOHO Joint Observing Programs in collaboration with Yohkoh/SXT and ground based observatories (GBO's), dedicated to observe dynamical events through the atmosphere. During runs of these programs we ...