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Desenvolvimento de um processo de separação de emulsão com o uso de radiação microondas para a caracterização de petróleo extrapesado
(Universidade Federal de Santa Maria, 2009-04-17)
In this work is proposed a procedure for separation in laboratory scale of extra-heavy
crude oil emulsions with high dissolved water and salt content, using microwave radiation in
a closed system. The emulsion was ...
Determinação de halogênios em carvão, coque petroquímico e alimentos após combustão iniciada por microondas
(Universidade Federal de Santa Maria, 2008-03-14)
The microwave-induced combustion (MIC) method was applied for coal and petroleum coke digestion for further determination of bromine, chlorine, fluorine and iodine
by ion chromatography (IC). Samples (up to 500 mg) were ...
Cefalosporinas e surfactante não-iônico em efluente hospitalar: determinação, degradação por meio de fotólise e eletrocoagulação e identificação de subprodutos e metabólitos
(Universidade Federal de Santa Maria, 2009-04-06)
The currently incorrect and excessive consumption of pharmaceuticals and surfactants, mainly domestic usage, has become a concern to the scientific community around the world, due to the environmental consequences with ...
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 arsênio e cromo em insumos farmacêuticos contendo enxofre por espectrometria de absorção atômica com forno de grafite e análise direta de amostras sólidas
(Universidade Federal de Santa Maria, 2007-09-17)
In this work a procedure was developed using direct solid sampling (DSS) and graphite furnace atomic absorption spectrometry (GF AAS). The study was applied to the determination of As in hydrochlorothiazide and barium ...
Determinação de tiocompostos por voltametria e coulometria em matrizes salinas
(Universidade Federal de Santa Maria, 2006-08-11)
The Laboratory of Support to Hemodialysis Clinics (LACHEM) has been investigating for many years the behaviour of many species in saline matrices as hemodialysis salts. In this work, the determination of the five thiocompounds ...
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 ...
Reatores de discos rotativos e tubular helicoidal na degradação fotocatalítica de diclofenaco e carga orgânica de efluente hospitalar
(Universidade Federal de Santa Maria, 2009-07-28)
In this study, the advanced oxidation process heterogeneous photocatalysis were used for the degradation of diclofenac and decrease of the organic load in the effluent from the emergency sector (PA) of the University ...
Arranjos supramoleculares de triazenidos complexos de Ag(I) através de ligações de hidrogênio
(Universidade Federal de Santa Maria, 2008-08-14)
In this work we synthesized and determinates the crystaline/molecular structure of thre Ag(I) complexes, all of them use monocatenated triazenide ligands previously desprotonated. The complex [Ag(C6H4FNNNC6H4NO2)(C5H5N)]2 ...