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Itens para a visualização no momento 11-20 of 21
Influência de modificadores orgânicos na determinação de chumbo em amostras de suplementos de cálcio por GF AAS
(Universidade Federal de Santa Maria, 2004-03-04)
The main goal of this study was to evaluate the effect of organic modifiers in the determination of lead in calcium supplement samples by graphite furnace atomic absorption spectrometry (GF AAS). Samples of refined calcium ...
Validação de procedimento analítico empregando SPE e GC-ECD para determinação de pesticidas organoclorados em água e avaliação da permeabilidade destes nos dialisadores utilizados em hemodiálise
(Universidade Federal de Santa Maria, 2004-08-27)
The dialysis of the blood, within which the most applied modality is the haemodialysis, is a method thoroughly used for the treatment of the renal inadequacy. With this treatment, toxic substances accumulated in the patient´s ...
Síntese regioespecífica de 1H-pirazolilquinolinas trifluormetil substituídas
(Universidade Federal de Santa Maria, 2004-07-27)
This work describes the synthesis of a serie of 4-(3-alkyl(aryl)-5-trifluoromethyl-1Hpyrazol-
1-yl)-7-chloroquinolines (6), from the cyclondensation reactions of 1,1,1-trifluoro-
4-methoxy-3-buten-2-ones (4) and ...
Desenvolvimento e validação de procedimento analítico para a determinação de compostos organohalogenados em fertilizante orgânico empregando GC-ECD
(Universidade Federal de Santa Maria, 2004-02-17)
The growing worldwide concern regarding the life quality, especially
regarding the preservation and appropriate use of natural resources and quality of
food, has reflected on the productive systems. Inside this new ...
Dimerização quimioseletiva de vinilarenos catalisada por tribrometo de índio
(Universidade Federal de Santa Maria, 2004-02-27)
This work describes our first results on the use of indium(III) salts as catalysts of oligo-polimerization processes of olefins. The first class of olefins which were tested was vinylarenes under the catalytic influence ...
Síntese e análise estrutural de compostos supramoleculares de Cd(II) com o ligante 4,6-dimetilpirimidina-2-tiona
(Universidade Federal de Santa Maria, 2004-03)
This dissertation describes the synthesis and analysis of the supramolecular
compounds α- and β-[Cd(DMPYMT-S)2]n, DMPYMT-S = 4,6-dimethylpyrimidine-2-
thione.
The reaction product of cadmium acetate dihydrate with ...
Síntese de derivados vinílicos e arílicos de compostos heteroaromáticos via reação de acoplamento do tipo Negishi
(Universidade Federal de Santa Maria, 2004)
Não foi possível inserir o abstract.
Síntese e análise estrutural de complexos de urânio (VI) coordenados aos ligantes hidrocloreto de piridoxina, 4-fenil-semicarbazida e a 2-(2´-hidroxifenil) benzoxazola.
(Universidade Federal de Santa Maria, 2004-02-26)
The synthesis and structural analysis of three new coordination
compounds containing uranium metal are described in this dissertation.
These compositions were synthesized with a mimetic ligand to a biological
structure, ...
Síntese estereosseletiva de bis(calcogenetos) vinílicos vicinais
(Universidade Federal de Santa Maria, 2004-03-23)
In this work, we developed a new methodology to prepare vinylic
bis(chalcogenides) 4, of exclusive Z configuration. The reaction involves a
titanium-alkyne complexes and organochalcogen electrophilic species. The
vinylic ...
Degradação de nonilfenol polietoxilado e de efluente têxtil por meio de eletrocoagulação e processos Fenton
(Universidade Federal de Santa Maria, 2004-07-29)
Nonylphenol polyethoxylates are nonionic surfactants widely
employed on textile industry. Submitted to inadequate effluent treatment processes, these compounds can be eventually biodegraded to metabolites with estrogenic ...