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Um modelo euleriano de dispersão de contaminantes aplicado em diferentes condições de estabilidade atmosférica
(Universidade Federal de Santa Maria, 2004-04-23)
This work describes a model for contaminant dispersion under
different atmospheric stability conditions. It can be used to simulate the concentration of contaminants released from sources located at different heights in ...
Síntese de heteroarilazóis trialometilsubstituídos a partir de 2-acetilfurano e 2-acetiltiofeno
(Universidade Federal de Santa Maria, 2004-04-07)
The synthesis of 1,1,1-trihalo-4-methoxy-4-[2-thienyl]-3-buten-2-ones, 1,1,1-trihalo-4-methoxy-4-[2-furyl]-3-buten-2-ones and the respective trihalomethyl 1,3-butanone derivatives by trihaloacylation of dimethoxy acetals
derived ...
Síntese e análise estrutural de novos tetrahaloorganoteluratos(IV) monoaniônicos e hexahaloteluratos(IV) dianiônicos
(Universidade Federal de Santa Maria, 2004-09-21)
This work presents our contribution about the solid state of new anionic tetrahaloorganyltellurates(IV) and dianionic hexahalotellurates(IV) compounds. We
present the synthesis and structural characterization of seven new ...
Síntese, propriedades e avaliações de interações intermoleculares no estado sólido de triazenos e complexos com cádmio(II)
(Universidade Federal de Santa Maria, 2004-07-23)
This work demonstrates the determination of the crystalline/molecular structure of three cadmium (II) complexes with monocatenated triazenes ligands previously deprotonated and the structures crystalline/molecular of two ...
Síntese de trifluormetil-cicloalca[d]-2(1h)-pirimidinonas e tiopirimidinonas
(Universidade Federal de Santa Maria, 2004-07-20)
This work describes the synthesis and identification of a serie of 4-trifluoromethylcycloalca[d]-2-(1H)-(thio)pyrimidinones, from the cyclocondensation reactions of 2-trifluoroacetylmethoxycycloalkenes with urea and ...
Consistência no cálculo perturbativo: a eletrodinâmica quântica e a anomalia
(Universidade Federal de Santa Maria, 2004-12-13)
We use a very general calculational method, concerning the divergences manipulations and calculations, in order to treat the perturbative solution of quantum electrodynamics (QED), at the one loop level, as well as to study ...
Estuda da formação de vacância induzida em nanotubos de carbono
(Universidade Federal de Santa Maria, 2004-12-14)
In this work we have performed the study of the single vacancy and the induced vacancy in carbon nanotubes by first-principles calculations using the SIESTA code,
which solves the Kohn-Sham equations via the local density ...
Estudo de primeiros princípios da interacão de monóxido de carbono com nanotubos de carbono semicondutores
(Universidade Federal de Santa Maria, 2004-10-08)
In this work we study the interaction of carbon monoxide with semiconducting (8,0)carbon nanotube through a first principles theoretical approach. Using density functional theory based methods, we show that radial ...
Pirólise lenta de serragem de eucalipto para obtenção de bioóleo e carvão
(Universidade Federal de Santa Maria, 2004-07-26)
This dissertation presents the slow pyrolysis of eucalyptus sawdust as an alternative, thermal process of treatment of forestry residues for the obtainment of gaseous, liquid and solid products. With the aid of a pyrolysis ...
Avaliação de procedimentos de digestão para determinação voltamétrica de traços metálicos em aminoácidos usados em nutrição parenteral aplicação na determinação de cádmio e chumbo
(Universidade Federal de Santa Maria, 2004-09-17)
In this work, the interaction of all the amino acids that compose the parenteral nutrition solutions, was investigated with the cadmium and lead metals, with the objective of determining the levels of contamination and if ...