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Itens para a visualização no momento 31-40 of 53
Plano de proteção de aqüíferos a partir de variáveis ambientais
(Universidade Federal de Santa Maria, 2005-05-10)
The available water reserve, economically viable for the human consumption, only restricts that parcel that if finds in the superficial and groundwater form, that represents only 0.7% of the water fresh existing in the ...
Determinação de mercúrio orgânico e inorgânico por CVG-GF AAS em tecido muscular de peixe após extração seletiva
(Universidade Federal de Santa Maria, 2005-05-06)
In this study a procedure for speciation analysis of Hg in muscle fish tissue was developed with us of selective extraction and determination of each species by chemical vapor generation with graphite furnace atomic ...
Determinação simultânea de Al(III) e Fe(III) em fluidos pós-hemodiálise empregando espectrofotometria e métodos de calibração multivariada
(Universidade Federal de Santa Maria, 2005-12-16)
This work aimed to explore the association of molecular absorption spectrometry with multivariate calibration techniques to the simultaneous determination of Al(III) and Fe(III) in post-dialysis fluids, from the complexes ...
Aplicação de geotecnologias no planejamento de unidade político-administrativa municipal
(Universidade Federal de Santa Maria, 2005-12-23)
The municipal planning depends on the monitoring, permanent modernization and efficient administration of information about the quality of the ambiance, what can be accomplished through Geographical Information Systems ...
Componentes da produtividade de grãos de milho (Zea mays L.), visando obter parâmetros para a agricultura de precisão
(Universidade Federal de Santa Maria, 2005-10-31)
In the traditional agriculture, cultures and soils parameters are variable in space and time,
also in the same field crops. Generally, yield and yield components are obtained without to
keep in main the space variability ...
A precisão possível com GPS L1-C/A em georreferenciamento: o desafio do multicaminho
(Universidade Federal de Santa Maria, 2005-11-24)
Since the creation of the system Navstar/GPS, several sources of observation errors went identified and studied by the scientific community, like as solution of ambiguities, delay ionospheric and non clock synchronous. The ...
Comparação entre métodos cromatográficos, empregando GC-ECD, GC-FPD e GC-MS, e espectrofotométrico para determinação de ditiocarbamatos em alface
(Universidade Federal de Santa Maria, 2005-08-03)
Brazil is the third largest market for pesticide sales in the world, with almost 400 active ingredients registered in the country, including five dithiocarbamates. This pesticide class consists of very important protective ...
Preparação e aplicação de ligantes selenoimínicos quirais em alquilações enantiosseletivas
(Universidade Federal de Santa Maria, 2005-02-24)
In this work, we describe the synthesis of a new series of chiral-seleno imine 7a-k from amino acids 1. These compounds were used as ligands in palladium-catalyzed asymmetric allylic alkylation of 1,3-diphenyl-2-propenyl ...
Síntese de 1-alquil(aril)-2-amino-5-trifluoracetil1,2,3,4-tetraidropiridinas
(Universidade Federal de Santa Maria, 2005-02-28)
A presente dissertação descreve a síntese de uma série inédita de 1-
alquil(aril)-2-alquil(aril)amino-5-trifluoracetil-1,2,3,4-tetraidropiridinas 6, a
partir de reações de ciclocondensação entre 2-alcoxi-5-trifluoracet ...
Desenvolvimento de metodologias para a especiação de arsênio em águas e matrize salinas empregando voltametria adsortiva de redissolução catódica
(Universidade Federal de Santa Maria, 2005-01-20)
The present work reports the development of methodologies for the arsenic speciation in waters and saline matrices by adsorptive cathodic stripping voltammetry (AdCSV). The determination of As(III) by AdCSV was investigated ...