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Metodologia analítica para o estudo da interação de cádmio e chumbo com alguns aminoácidos presentes em soluções de nutrição parenteral
(Universidade Federal de Santa Maria, 2005-12-14)
The patients' health under treatment by Parenteral Nutrition (PN) is directly associated to the quality of the solutions used during the procedures and thus, a rigorous quality control is necessary. Among possible contaminants, ...
Conversão térmica de casca de arroz à baixa temperatura: produção de bioóleo e resíduo sílico-carbonoso adsorvente
(Universidade Federal de Santa Maria, 2005-07-29)
The exploitation of rice husks through thermal conversion at low temperature, adding economical value through its pyrolysis products, may represent a solution to the current environmental problem of discharging this ...
Estudo fitoquímico de três espécies pertencentes à família Rhamnaceae: Discaria americana, Colletia paradoxa e Gouania ulmifolia
(Universidade Federal de Santa Maria, 2005-08-26)
The present work describes the phytochemistry study and antimicrobial activity of the aerial parts and bark root of three species from Rhamnaceae family: Discaria americana Gilles & Hook, Colletia paradoxa Sprengel and ...
Determinação de cádmio, cobre e chumbo por F AAS e GF AAS em plantas medicinais empregando amostragem direta de sólidos
(Universidade Federal de Santa Maria, 2005-07-29)
The main objective of this study was to use alternative systems for the analysis of solids by graphite furnace atomic absorption spectrometry (DSS-GF AAS) and with flame (SS-F AAS) for cadmium, copper and lead in determination ...
Estudo fitoquímico da raiz da espécie Melochia chamaedrys St. Hil
(Universidade Federal de Santa Maria, 2005-11-04)
Melochia chamaedrys St.Hil. is a plant that is locally known as douradinha , it is found in South America, more exactly in the south of Brazil, Argentina, and Uruguay. In the state of Rio Grande do Sul , the species M. ...
Reações de 1,1,1-tricloro-4-metoxi-3-penten-2-ona com hidrazinas monosubstituídas
(Universidade Federal de Santa Maria, 2005-02-18)
The 1,1,1-trichloro-4-methoxy-3-penten-2-ona (CCl3COCH=CHOMe) reaction with hydrazines series (RNHNH2, where R = H, Me, tert-Bu, Ph, Ph(F)5, Ph-4-NO2, CO2Me e CONH2) yield to the pyrazoles N-substituted and derivatives ...
Desenvolvimento e validação de método multirresíduo, empregando GC-ECD E GC-MS, para a investigação de pesticidas em morango, maçã e uva
(Universidade Federal de Santa Maria, 2005-03-03)
Pesticides use is still the main strategy used in the field for the combat and the prevention of agricultural plagues, guaranteeing enough food and of quality for the population. In the culture of fruits, especially in ...
Síntese, caracterização e cristaloquímica de complexos da cobre(I) e mercúrio(II) com ligantes triazenidos
(Universidade Federal de Santa Maria, 2005-07-20)
The reaction between mercury(II) acetate and 1-(3-nitrophenyl)-3-(2-fluorophenyl)triazene in a tetrahydrofuran/methanol mixture in the presence of
2,2′-bipiridylamine yields the complex [Hg(FC6H4NNNC6H4NO2)2] (1). (1) ...
Síntese, estruturas de triazeno 1-óxido e complexo de k+, e avaliação da atividade biológica de 1-metiltriazenos 1-óxido e 1,3-bis(aril)triazenos
(Universidade Federal de Santa Maria, 2005-12-19)
This work is associated with the crystal and molecular structure analysis of two free triazene 1-oxide molecules and a complex with K+ involving a p-carboxyfenil-substituted single protonated triazene 1-oxide ligand. ...
Reação de β-dimetilaminovinil cetonas com hidroxilamina: regioquímica de formação de 4,5-diidroisoxazóis e de isoxazóis
(Universidade Federal de Santa Maria, 2005-07-28)
The regiochemistry study of the formation of a series of aryl-, heteraryl- and haloalkyl-substituted isoxazoles from the reaction of β-dimethylaminovinyl ketones and
hydroxylamine is reported. The precursors β-imethylaminovinyl ...