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Itens para a visualização no momento 21-30 of 93
Determinação de glifosato e ampa em água por injeção direta da amostra em cromatografia iônica capilar e LC-MS/MS
(Universidade Federal de Santa Maria, 2014-08-29)
Glyphosate [N-(phosphonomethyl) glycine] is the most widely used pesticide in the world for controlling weeds in agriculture. High amounts of this herbicide and its major metabolite, aminomethylphosphonic acid (AMPA), have ...
Estudo de impureza de európio em PbSe e PbTe. Uma investigação de primeiros princípios
(Universidade Federal de Santa Maria, 2014-01-30)
In this work properties were studied the structural, electronic and magnetic semiconductors
PbSe and PbTe doped with europium (Eu) in the crystalline phase. The
investigation is performed within the density functional ...
Caracterização de filmes finos magnéticos em altas frequências
(Universidade Federal de Santa Maria, 2014-08-29)
In order to determine the complex permeability of ferromagnetic samples in the GHz
range, measurement techniques with transmission lines are most appropriate. These techniques
use the modification of the scattering ...
Conjunto de testes de garantia de qualidade de um software para planejamento radioterápico
(Universidade Federal de Santa Maria, 2014-05-29)
Radiotherapy can be highlighted as one possible treatment of cancer. From this point of view, the planning system for radiotherapic treatment is crucial. In order to check the software for the computerized planning of the ...
Estudo computacional da condutividade térmica de nanofios de Si
(Universidade Federal de Santa Maria, 2014-05-15)
In this work the thermal conductivity κ of Si nanowires using molecular dynamics simulations is calculated using the Müller-Plathe method. We show that at 500 K, κ for crystaline Si is 121; 557 W/mK, while for nanowires, ...
Síntese verde e versátil de calcogenol ésteres e avaliação da atividade antibacteriana
(Universidade Federal de Santa Maria, 2014-08-30)
The present work aims the synthesis of chalcogenoesters, by a green and
versatile methodology, using low cost and non-toxic reagents, as well as the
biological activity of this kind of compounds, as antibacterial agents.
By ...
A filtração standard de uma álgebra de Hopf
(Universidade Federal de Santa Maria, 2014-03-25)
In this work we present the lifting method [AS2], which is used to classify certain class of Hopf algebras. Since this method is based on the coradical filtration, it can be used just for those Hopf algebras satisfying the ...
Estudo da atividade antioxidante in vitro e caracterização cromatográfica em extratos de plantas medicinais da Amazônia
(Universidade Federal de Santa Maria, 2014-03-12)
Most of the free radicals generated in the body is derived from oxygen and are associated with
the development of many diseases. Medicinal plants are a natural resource in the treatment
prevention of diseases and have ...
Ensino de polinômios no ensino médio uma nova abordagem
(Universidade Federal de Santa Maria, 2014-08-22)
This dissertation aims to propose a new approach in teaching polynomials. As this subject is worked in the last year of high school, we offer a proposal focused on higher education, but in an investigative and intuitive ...
Álgebra de Hopf trançada a partir de um par combinado de grupos
(Universidade Federal de Santa Maria, 2014-08-15)
Let (F,G, ◃, ▹) be a matched pair of finite groups and σ : F × F −→ (|×)G and
τ : G×G −→ (|×)F two 2-cocycles. In general, the bicrossed product R = |G ∗τ
σ |F
is not a bialgebra, neither a braided Hopf algebra. The ...