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Determinação de resíduos de pesticidas em solo de lavoura de arroz irrigado empregando QuEChERS modificado e LC-MS/MS
(Universidade Federal de Santa Maria, 2010-12-15)
The use of pesticides and their residues have become a problem due to possible contamination of soil, impacting on the environment and causing trouble to public health. In this research, an analytical method was optimized ...
Pirólise lenta de serragem de eucalipto para obtenção de bioóleo e carvão
(Universidade Federal de Santa Maria, 2004-07-26)
This dissertation presents the slow pyrolysis of eucalyptus sawdust as an alternative, thermal process of treatment of forestry residues for the obtainment of gaseous, liquid and solid products. With the aid of a pyrolysis ...
Avaliação de procedimentos de digestão para determinação voltamétrica de traços metálicos em aminoácidos usados em nutrição parenteral aplicação na determinação de cádmio e chumbo
(Universidade Federal de Santa Maria, 2004-09-17)
In this work, the interaction of all the amino acids that compose the parenteral nutrition solutions, was investigated with the cadmium and lead metals, with the objective of determining the levels of contamination and if ...
Influência dos sistemas nanoestruturados na fotoestabilidade e na atividade antioxidante dos compostos fenólicos eugenol, isoeugenol e dehidrodieugenol
(Universidade Federal de Santa Maria, 2012-02-23)
There is a great interest in the study of antioxidants, mainly due to the findings on the effect of radicals in the body. These radicals are needed in many biological processes, but also may be related to processes harmful ...
Avaliação do comportamento de espécies de mercúrio em peixes após diferentes métodos de cocção
(Universidade Federal de Santa Maria, 2011-03-22)
Most of studies evaluating Hg in fish have been developed using fresh fish and
the few studies involving the assessment of Hg in fish after cooking process, involve
only the determination of total Hg and no clear conclusions ...
BTEX: Desenvolvimento de barras de extração sortiva, determinação em efluente hospitalar e degradação por meio de fotocatálise heterogênea com TiO2 suportado em polímeros
(Universidade Federal de Santa Maria, 2012-02-24)
In this work were developed low cost bars of sorptive extraction, using commercial adhesive based on polydimethylsiloxane (PDMS) for the preconcentration and determination of benzene, toluene, ethylbenzene and xylene (BTEX) ...
Determinação de resíduos de agrotóxicos em mel empregando método QuEChERS modificado e GC-ECD
(Universidade Federal de Santa Maria, 2011-08-03)
The production of honey has been increasing continuously in the world in function of
the greatest consume of natural products. It is related directly to human health, and stimulated
by its therapeutics and nutritious ...
Desenvolvimento de métodos de preparo de amostras para posterior determinação de As, Cd e Pb em carne e produtos cárneos
(Universidade Federal de Santa Maria, 2012-12-05)
Sample preparation methods, such as microwave-assisted wet digestion, dry ashing, wet digestion in open system and tetramethylammonium hydroxide (TMAH) solubilization were evaluated for subsequent As, Cd and Pb determination ...
Síntese e atividades antimicrobiana/antioxidante de 5-trifluormetil-5-hidróxi-4,5-diidro-1h-pirazóis 1-(2-naftoxiacetil), 1-fenoxiacetil, 1-tiofenoxiacetil, 1-(n-fenilglicina) substituídos
(Universidade Federal de Santa Maria, 2011-07-01)
This work describes an efficient approach for the regioselective synthesis of
new series of substituted 1-(2-naphthoxyacetyl), 1-phenoxyacetyl, 1-thiophenoxyacetyl,
1-(N-phenylglicine)-5-trifluoromethyl-5-hydroxy-4,5-dih ...
Avaliação de métodos de preparo de amostras para a determinação de cloro em temperos
(Universidade Federal de Santa Maria, 2012-05-24)
In this study, sample preparation methods were evaluated for the
determination of chlorine by ion chromatography (IC) in spice samples. The
microwave-induced combustion method (MIC) was tested using certified ...