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Itens para a visualização no momento 121-130 of 157
Síntese, análise estrutural e caracterização de seleninatos de manganês (II)
(Universidade Federal de Santa Maria, 2012-03-09)
In this study three novel compounds were synthesized and characterized from pre-ligands phenylseleninic acid 1, 4-methylphenyilseleninic acid 2 , 4-chlorophenylseleninic acid 3 and 4-bromophenylseleninic acid 4. The reactions ...
Síntese e caracterização de iodetos de diteluroéteres - análise da estrutura supramolecular
(Universidade Federal de Santa Maria, 2012-02-28)
This work describes the synthesis and characterization of thirteen new compounds belonging to the class of ditelluroethers iodides. The starting materials (ditelluroethers) were synthesized by a method few mentioned in the ...
Sazonalidade da concentração de CO2 atmosférico em uma área agrícola no RS
(Universidade Federal de Santa Maria, 2012-01-31)
In this work an agricultural area in Cruz Alta/RS was used to evaluate the seasonality of CO2
concentration with respect to meteorological variables of temperature, global radiation and
rainfall. The study period was ...
Indução de um eixo fácil de magnetização utilizando máscaras de sombreamento em filmes finos de CoFeB
(Universidade Federal de Santa Maria, 2012-01-30)
CoFeB thin films were produced using the technique of magnetronsputtering. Six
samples were produced magnetic thin films with two different thicknesses, using
different settings for shading masks. For each film were made ...
Modelagem dinâmica de uso e cobertura da terra da bacia do Arroio Grande - RS
(Universidade Federal de Santa Maria, 2012-09-28)
Located on the mid-region of Rio Grande do Sul, the watershed of the Arroio Grande
lies on the transition of the Central Depression to the Southern Plateau. Belonging to
the geographic micro-region of Santa Maria, the ...
Bifurcação de Turing-Hopf em um sistema presa-predador
(Universidade Federal de Santa Maria, 2012-06-04)
In this work we studing a generalized predator-prey system in a spatial domain, in
terms of formation. We show parameter, regions where transcritical, Hopf and Turing
bifurcations appear are presented, and also some ...
Síntese de 2-Benzil(metil)tio-6-aril(metil)pirimidinas-4-carboxilato de Etila e seus Ácidos Derivados
(Universidade Federal de Santa Maria, 2012-08-10)
This work presents a simple and versatile synthetic strategy for the preparation of a novel series of Ethyl 2-Benzyl(methyl)tiopyrimidines-4-carboxylate 6-substituted and their acids derivatives.
The Ethyl 2-Benzyl(meth ...
Envelopamento da tropopausa no sul da América do Sul: relações entre a corrente de jato em altos níveis e a coluna total de ozônio
(Universidade Federal de Santa Maria, 2012-11-19)
This study discusses the influence of tropopause folding in ozone total column during
the passage of frontal systems. This research aims to analyze, from the relations
between the upper level jet and the ozone total ...
Precisão de coordenadas planimétricas obtidas com receptores GNSS de pontos situados sob redes elétricas de alta tensão
(Universidade Federal de Santa Maria, 2012-09-17)
The purpose of this work was investigate and measure the possibility to exist
multipath caused by the corona noise generated in high voltage electric lines
recepting GNSS signals. Experiments were realized with a 69 kV ...
Síntese one pot de 1,3,4-oxadiazóis derivados de L-aminoácidos e benzoil-hidrazidas
(Universidade Federal de Santa Maria, 2012-07-20)
In the following work, a range of 1,3,4-oxadiazles 2,5-disubstituted 3 was
prepared, using a one pot approach, from L-amino acids 1(a-e) and 2-benzoylhydrazides,
using POCl3 as dehydrating agent.
The study involved the ...