Buscar
Itens para a visualização no momento 1-10 of 91
Problemas inversos em física da atmosfera
(Universidade Federal de Santa Maria, 2005-04-08)
Techniques for estimating unknown terms - such as eddy diffusivity and counter-gradient - in atmospheric flow are presented in this study. The methos is also used to identify the source term in atmospheric pollution. The ...
População de plantas e a ocorrência de moléstias no feijoeiro comum
(Universidade Federal de Santa Maria, 2005-01-26)
Tree experiments were conducted in Santa Maria end Constantina (State of Rio Grande do Sul- Brazil), objecting to determine the best plant population of type II e III of common bean grown in the season and latter season, ...
Modelo espectral de heisenberg aplicado ao decaímento da turbulência na camada residual
(Universidade Federal de Santa Maria, 2005-10-22)
In the study of the dispersion of contaminants in the atmosphere by computational simulations, the Eulerian approach, based in the diffusionadvection equation, is largely employed. In these simulations, concentration values ...
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. ...
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 ...
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 ...