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Determinação de elementos do grupo da platina em carvão com alto teor de cinzas por ICP-MS
(Universidade Federal de Santa Maria, 2017-06-03)
In this work a method for the digestion of high ash content coal (>30%) using a high
pressure asher (HPA) system for further determination of platinum group elements
(PGEs) by inductively coupled plasma mass spectrometry ...
Efeitos causados por nanopartículas de La2O3 em Pfaffia glomerata (Spreng.) Pedersen e estudo da distribuição de elementos por LA-ICP-MS
(Universidade Federal de Santa Maria, 2018-03-02)
The effect of La2O3 nanoparticles (NP-La2O3) on plants of the species
Pfaffia glomerata (Spreng.) Pedersen was investigated. Besides, the translocation
and the distribution of the NPs in aerial parts of the plant were ...
Síntese e avaliação biológica dos compostos 3-triazoilcalcogeniltimidina
(Universidade Federal de Santa Maria, 2018-02-26)
This work describes the synthesis and antioxidant and antitumoral activity of 3-triazoylcalcogenylthymidine (7a-o). A variety of nucleoside analogues were prepared using a Huisgen 1,3-dipolar cycloaddition, between the ...
Efeitos energéticos e topológicos no design de cocristais de compostos aromáticos e em 1,5-diaril-1h-pirazol-3-carboxilatos de etila
(Universidade Federal de Santa Maria, 2017-07-20)
This work presents the study of the supramolecular environment in multicomponent crystals. Multicomponent
crystals were defined by J. D. Dunitz as a crystal containing two or more components together, so that this
concept ...
Determinação multirresíduo de agrotóxicos em abelha e pólen apícola empregando método QuEChERS modificado e LC-MS/MS
(Universidade Federal de Santa Maria, 2017-07-21)
The use of pesticides contributes to increase the production, but there is a growing concern with its adverse effects in the environment. The decline of bee population and the contamination of apicultural products by ...
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 ...