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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 ...
Síntese, propriedades e avaliações de interações intermoleculares no estado sólido de triazenos e complexos com cádmio(II)
(Universidade Federal de Santa Maria, 2004-07-23)
This work demonstrates the determination of the crystalline/molecular structure of three cadmium (II) complexes with monocatenated triazenes ligands previously deprotonated and the structures crystalline/molecular of two ...
Síntese, propriedades e investigação estrutural de 1,3-diariltriazenos e complexos com Ni(II), Pd(II), Pt(II) e Hg(II)
(Universidade Federal de Santa Maria, 2006-08-04)
Although transition metal complexes with nitrogen coordination spheres involving monocatenated 1,3-diarylsubstituted triazenido ligands (ArNNNAr)−, have been investigated in the last decades, the structure of such compounds ...
Biorremediação de herbicidas em água do cultivo de arroz irrigado visando minimizar o impacto ambiental
(Universidade Federal de Santa Maria, 2008-12-22)
Irrigated rice production depends on the pesticides application, among other factors. Herbicides could be highlighted as the most used ones, which may be transported into natural water sources, generating pollution 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 ...
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. ...
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 ...
Consistência no cálculo perturbativo tridimensional em teoria quântica de campos: a eletrodinâmica quântica
(Universidade Federal de Santa Maria, 2005-03-14)
In this work we present a detailed study about the three-dimensional quantum electro-
dynamics QED3, in perturbative solution at the one loop level. A very general method,
concerning the manipulations and calculations ...