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Síntese de 1,7-fenantrolinas e 7-aminoquinolinas trifluormetil substituídas
(Universidade Federal de Santa Maria, 2010-02-26)
This work, at first, describes the synthesis and characterization of new series of (Z,Z)-N,N -bis(oxotrifluoroalkenyl)-1,3-phenylenediamines by the addition/elimination reaction of β-alkoxyvinyl trifluoromethyl ketones ...
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. ...
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 ...
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 ...
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 ...