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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 ...
Estudo das propriedades eletrônicas e estruturais da heterojunção dos nanotubos de nitreto de boro e nitreto de alumínio
(Universidade Federal de Santa Maria, 2007-05-18)
In this work we present the study of the electronic and structural properties of the heterojunction formed by (10,0) zig-zag nanotubes of aluminum nitride (AlN) and boron nitride (BN). To simulate the system, we use periodic ...
Avaliação de arranjos supramoleculares de complexos triazenidos de mercúrio (II) e cobre(II)
(Universidade Federal de Santa Maria, 2007-10-10)
The reaction between deprotonated 1,3-Bis(3-acetylphenyl)triazene and Hg(CH3COO)2 in methanol, yields [Hg(RNNNR)(Py)] (R=3-CH3C(O)C6H4) (1), a triazenide dimeric mononuclear complex of mercury(II). The crystal structure ...
Síntese e análise estrutural de novos plímeros de coordenação envolvendo seleninatos de metais alcalinos e alcalinos terrosos
(Universidade Federal de Santa Maria, 2007-12-03)
Seven new compounds involving the phenylseleninato ligand and alkaline and alkaline earth metals were obtained in this work: poly-phenylseleninato lithium(I) (1), catena-polybis(aqua)-phenylseleninato sodium(I) (2), ...
Fundamentos conceituais da determinação do geóide pelo método gravimétrico
(Universidade Federal de Santa Maria, 2007-03-30)
Fundamental concepts of gravimetric geoid determination with the objective to didatic methodology. It s described that the study of the real Earth have a large number of variable, what becomes impracticable the problem ...
Estudo das características físico-químicas do solo em plantio de erva-mate (Ilex paraguariensis St. Hil.) através da geoestatística e do geoprocessamento
(Universidade Federal de Santa Maria, 2007-04-13)
This work was based in methods of classic descriptive statistics, methods of geostatistics and geoprocessing, in the identification of the size and the structure of the spatial variability of the physical and chemical ...
Estudo da difusão turbulenta empregando modelos estocásticos Lagrangeanos
(Universidade Federal de Santa Maria, 2007-03-09)
In this work, the Lagrangian stochastic particle model LAMBDA is utilized to simulate the dispersion and the transport of contaminants under different atmospheric conditions. The analysis employs three different field ...
Desenvolvimento de procedimentos alternativos de preparo e de determinação de metais pesados em fármacos tricíclicos
(Universidade Federal de Santa Maria, 2007-08-24)
In this work, sample preparation and determination methods described in pharmacopeias were evaluated and alternative methods using sample decomposition in closed vessels and determination by atomic spectrometrometry were ...
Desenvolvimento e avaliação de sistema em fluxo para especiação de mercúrio
(Universidade Federal de Santa Maria, 2007-01-29)
A flow injection (FI) system, which is coupled to an atomic absorption spectrometer, is proposed for organic and inorganic mercury speciation. The FI system consists basically of three three way-solenoid valves, a gas/liquid ...
Divisão de polígonos irregulares do elipsóide biaxial na superfície da projeção azimutal equivalente de Lambert
(Universidade Federal de Santa Maria, 2007-10-03)
This dissertation supplies the methodology of the measure (area) in the Earth model adopted for Geodesy. This model is the ellipsoid of revolution, in which the system of Cartesian coordinates, the curvilinear coordinate ...