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Mostrando ítems 13531-13540 de 31574
Pulsating low-mass white dwarfs in the frame of new evolutionary sequences. I: adiabatic properties
(Edp Sciences, 2014-09)
Context. Many low-mass white dwarfs with masses M∗/M⊙ ≲ 0.45, including the so-called extremely low-mass white dwarfs (M∗/M⊙ ≲ 0.20 − 0.25), have recently been discovered in the field of our Galaxy through dedicated ...
Permethylated β-cyclodextrin/pesticide complexes: X-ray structures and thermogravimetric assessment of kinetic parameters for complex dissociation
(Springer, 2012-04)
The X-ray crystal structures of the inclusion complexes formed between three pesticides (two organophosphorus insecticides and one chloroacetanilide herbicide) and permethylated β-cyclodextrin (TRIMEB) are reported. The ...
Photocatalytic hydrogen production over titania modified by gold – Metal (palladium, nickel and cobalt) catalysts
(Elsevier, 2016-12)
The photocatalytic production of hydrogen on modified Au/TiO2-based photocatalysts by using water/methanol mixtures was studied. The main goal was to study the effect of surface modification of Au/TiO2 with Pd, Ni and Co ...
Measurement of the extragalactic background light imprint on the spectra of the brightest blazars observed with H.E.S.S.
(EDP Sciences, 2013-02)
The extragalactic background light (EBL) is the diffuse radiation with the second highest energy density in the Universe after the cosmic microwave background. The aim of this study is the measurement of the imprint of the ...
Nitrogen dopedTiO2 photoactive in visible light
(Universidade Federal do Rio de Janeiro. Coordenação dos Programas de Pós-Graduação em Engenharia. Laboratório de Hidrogênio, 2015-09)
In this research TiO2 modified with nitrogen has been prepared. The synthesis method used was sol gel from the hydrolysis of titanium tetrabutoxide with urea solution, combined with a low temperature treatment at atmospheric ...
Giga-year evolution of Jupiter Trojans and the asymmetry problem
(Elsevier Inc, 2014-09)
We present a series of numerical integrations of observed and fictitious Jupiter Trojan asteroids, under the gravitational effects of the four outer planets, for time-spans comparable with the age of the Solar System. From ...
Lithium titanate as anode material for lithium ion batteries: Synthesis, post-treatment and its electrochemical response
(Elsevier Science Sa, 2017-08)
The relationship between the structure and crystallinity of lithium titanate Li4Ti5O12, at different synthesis post-treatment conditions on the electric energy storage capacity is discussed. Li4Ti5O12 was synthesized by ...
Possible mechanism of structural transformations induced by StAsp-PSI in lipid membranes
(Elsevier Science, 2014-01)
In the present work we have analyzed the effect of StAsp-PSI (plant-specific insert of potato aspartic protease) on the structural and thermotropic properties of the major phospholipid types of bacterial and animal cells. ...
Carbon stable isotopes as indicators of the origin and evolution of CO2 and CH4 in urban solid waste disposal sites and nearby areas
(Springer, 2016-02)
Isotopic compositions of CH4 and CO2 surface and subsurface gases and groundwater from an urban solid waste disposal site from Gualeguaychú city (Argentina) were measured to detect origin, depth distribution, migration ...
Surface adsorption behaviour of milk whey protein and pectin mixtures under conditions of air-water interface saturation
(Elsevier Science, 2011-07)
Milk whey proteins (MWP) and pectins (Ps) are biopolymer ingredients commonly used in the manufacture of colloidal food products. Therefore, knowledge of the interfacial characteristics of these biopolymers and their ...