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Análise multivariada aplicada no estudo de dentifrícios comercializados no Brasil
(Universidade Federal de Santa Maria, 2018-03-02)
In this work we investigate the similarity between the chemical compositions described on the
packaging of Brazilian dentifrice samples and the concentrations of fluoride and pH in
dentifrices marketed in South Brazil. ...
Investigação de metabólitos secundários de Tabernaemontana catharinensis A. DC. – (Apocynaceae) e suas potenciais atividades antimicrobianas
(Universidade Federal de Santa Maria, 2018-07-17)
The phytochemical investigation of hexane and methanolic crude extracts and their fractions from the
bark of the stem of Tabernaemontana catharinensis (Apocynaceae, commonly known as cobrina) led
to the isolation of nine ...
Dinamismo estrutural e transformação monocristal para monocristal de novas estruturas estendidas de chumbo(II)
(Universidade Federal de Santa Maria, 2016-09-09)
The reaction of 1,4-α,α’-xylenediylbis(phenylphosphinic acid) (H2XBPP) with lead(II) generated two different extended structures: [Pb3(XBPP)3(H2O)] 1 and [Pb5(μ3-O)(XBPP)4(H2O)] 5 depending on the pH employed in the reaction. ...
Síntese, caracterização e avaliação da atividade peroxidase de novos complexos de cobalto com ligantes derivados do piridoxal
(Universidade Federal de Santa Maria, 2017-02-16)
This work treat with the synthesis and characterization of new cobalt complexes with ligands derived from pyridoxal and their application as mimetics of the enzyme peroxidase. The complexes were structurally characterized ...
Energia de interação cátion-ânion de líquidos iônicos dicatiônicos em fase gasosa
(Universidade Federal de Santa Maria, 2016-08-05)
Electrospray ionization mass spectrometry (ESI-MS) with induced collision energy was used to carry out a comprehensive study on the interaction energies between cations and anions of dicationic ionic liquids. The influence ...
Síntese de partículas submicrométricas de carbonato de cálcio a partir de sais inorgânicos utilizando polímeros lineares como modificadores de cristalização
(Universidade Federal de Santa Maria, 2017)
In this work, we report the synthesis of submicrometer calcium carbonate
particles using the simplest approach of mixing solutions of calcium chloride
and ammonium carbonate inorganic precursors in presence of ...
Resíduos de agrotóxicos em água potável usando SPE e determinação rápida por LC-MS/MS e GC-MS/MS
(Universidade Federal de Santa Maria, 2012-08-31)
The use of pesticides always has been associated with the effective control of pests
or invasive weeds to ensure an increase in the food production. However, the indiscriminate
use of these substances has caused the ...
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 ...
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 ...