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High-performance liquid chromatographic separation and identification of polyphenolic compounds from the infusion of Davilla elliptica St. Hill
(John Wiley & Sons Ltd, 2008-01-01)
The isolation of polyphenolic compounds from an infusion of the Brazilian plant Davilla elliptica (Dilleniaceae), used as tea by virtue of its digestive properties, is described. An improved preparative HPLC method was ...
Towards coherent optical control of a single hole spin: Rabi rotation of a trion conditional on the spin state of the hole
(Pergamon-Elsevier B.V. Ltd, 2009-09-01)
A hole spin is a potential solid-state q-bit, that may be more robust against nuclear spin induced dephasing than an electron spin. Here we propose and demonstrate the sequential preparation, control and detection of a ...
Armadilhas cognitivas: o caso das omissões na gênese dos acidentes de trabalho
(Escola Nacional de Saúde Pública Sergio Arouca, Fundação Oswaldo Cruz, 2004-10-01)
Neste artigo discute-se o tema das omissões na gênese de acidentes do trabalho, tendo como referência contribuições de James Reason. Os autores descrevem três acidentes de trabalho ocorridos em atividades de manutenção, e ...
Use of radiograph optical densitometry to monitor bone quality in broiler breeders
(Fundação APINCO de Ciência e Tecnologia Avícolas, 2006-03-01)
This study was carried out at Faculdade de Medicina Veterinária e Zootecnia, Universidade Estadual Paulista, Botucatu, SP, Brazil, and evaluated bone quality in broiler breeders. Twenty-three families of Ross broiler ...
Miscibility in a degenerate fermionic mixture induced by linear coupling
(Amer Physical Soc, 2006-11-01)
We consider a one-dimensional mean-field-hydrodynamic model of a two-component degenerate Fermi gas in an external trap, each component representing a spin state of the same atom. We demonstrate that the interconversion ...
Effects of time-periodic linear coupling on two-component Bose-Einstein condensates in two dimensions
(Elsevier B.V., 2008-03-03)
We examine two-component Gross-Pitaevskii equations with nonlinear and linear couplings, assuming self-attraction in one species and self-repulsion in the other, while the nonlinear inter-species coupling is also repulsive. ...
Understanding the origin of photoluminescence in disordered Ca0.60Sr0.40WO4: An experimental and first-principles study
(Elsevier B.V., 2007-04-20)
Visible photoluminescence (PL) was observed for the first time at room temperature in structurally disordered calcium strontium tungstate powder, Ca0.60Sr0.40WO4 (CSW), obtained by the polymeric precursor method. The PL ...
Electrochemical capacitance spectroscopy and capacitive relaxation of the changeover process in iron hexacyanoferrate molecular compound
(Pergamon-Elsevier B.V. Ltd, 2010-08-30)
In this work it was proposed the use electrochemical capacitance spectroscopy (ECS) to evaluate the storage process during changeover in FeHCF compound. The approach is equivalent to electrochemical impedance spectroscopy ...
Photorefractive two-wave mixing phase coupling measurement in a self-stabilized recording regime
(Iop Publishing Ltd, 2008-10-01)
The measurement of the phase coupling. between the two-wave mixed transmitted and diffracted beams behind a photorefractive material is directly obtained using a self-stabilized recording technique. These phase coupling ...
Electrical properties of lanthanum doped Bi4Ti3O12 thin films annealed in different atmospheres
(Elsevier B.V., 2007-01-01)
Pure-and lanthanun doped Bi4Ti3O12 thin films were deposited on Pt/Ti/SiO2/Si substrate using a polymeric precursor solution. Annealing in static air and oxygen atmosphere was performed at 700 degrees C for 2 h. The obtained ...