Buscar
Itens para a visualização no momento 421-430 of 619
Determinação de alumínio e ferro em fluidos pós-hemodiálise empregando voltametria e decomposição de amostras com radiação ultravioleta
(Universidade Federal de Santa Maria, 2007-10-19)
The simultaneous determination of Al(III) and Fe(III) in post-hemodialysis fluids was investigated by the Adsorptive stripping voltammetry (AdSV) of solochrome violet (SVRS) metal complexes. The analytes build electroche ...
Líquidos iônicos: aplicação na síntese de β-dimetilaminovinil cetonas e na N-alquilação de pirazóis
(Universidade Federal de Santa Maria, 2007-02-15)
The synthesis of two 1-methyl-3-alkylimidazolium tetrafluoroborate (where alkyl = butyl, octyl; [BMIM]BF4 and [OMIM]BF4) based on room temperature ionic
liquids (RTIL) is reported. The usefulness of these ionic liquids ...
Síntese e análise estrutural de novos dihaloorganoteluratos(II) monoaniônicos.
(Universidade Federal de Santa Maria, 2006-02-17)
In this dissertation the synthesis and structural characterization of the new series of monoanionic dihaloorganyltellurates(II) compounds with a general formula (C5H6N)[mesTeX2] is presented. Dimesitylditelluride (mesTe)2 ...
Síntese de 2-amino(alcoxi)-5-trifluoracetil-1,2,3,4-tetraidropiridinas e oxazolo[3,2-a]piridinas
(Universidade Federal de Santa Maria, 2006-07-03)
The present work describes the synthesis of novel 2-alkoxy-5-trifluoroacetyl-1,2,3,4-tetrahydropyridines, 2-amino-5-trifluoroacetyl-1,2,3,4-tetrahydropyridines and oxazolo[3,2-a]pyridines from the cyclocondensation reactions ...
Gradientes de abundâncias químicas em galáxias espirais
(Universidade Federal de Santa Maria, 2006-06-28)
We used photoionization models in order to derive O/H, N/O, and S/O abundance gradients in three isolated barred spiral galaxies (NGC 1365, NGC 925, NGC 1073) and in nine spiral galaxies (NGC 4501, NGC 4571, NGC 4689, NGC ...
Análise do desempenho escolar de alunos aprovados em conselho de classe
(Universidade Federal de Santa Maria, 2004-05-29)
The Academic Council of a school is an activity that joins a group of teachers of the same grade,
aiming, in group, to reach to a systematic knowledge of the class, as well as follow and evaluate each
student individually, ...
Determinação de cádmio e chumbo em sangue por espectrometria de absorção atômica com tubo aquecido na chama após combustão iniciada por microondas
(Universidade Federal de Santa Maria, 2007-07-25)
In this work a procedure for Cd and Pb determination by solid sampling flame furnace atomic absorption spectrometry after microwave induced combustion (MIC-FF-AAS) is used. Human blood samples were priory lyophilized, ...
Técnicas de geoprocessamento na determinação do índice de perigo de incêndios
(Universidade Federal de Santa Maria, 2006-04-13)
The forest fire is considered an environmental impact, because provokes physic, biotic and anthropic environment characteristics changes or modifications. Brasil
doesn't have an adequate fire politic support. It's necessary ...
Aproveitamento da casca de arroz para a produção de xilitol e sílica xerogel
(Universidade Federal de Santa Maria, 2009-12-01)
The generation of residual materials and its unavoidable disposal in the environment has been a reason of great concern, not only environmentally but also economically. The use of these renewable residual feedstocks, not ...
Um interpretador de regras para gerenciamento de ações de controle de acesso e alarme
(Universidade Federal de Santa Maria, 2008-01-31)
This work is part of the CONVERGE UFSM project, which aims at the integration
of several technologies in a network of sensors and actuators, for the development of a
access and alarm control system. The application develop ...