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Desenvolvimento e validação de método para determinação de etilenotiouréia em urina empregando HPLC UV
(Universidade Federal de Santa Maria, 2008-03-28)
In order to supply the world-wilde demand for food, it is essential to use the pesticides to protect the crops against pests and diseases. But the indiscriminate and injudicious use of these compounds have resulted in ...
Síntese e atividade antimicrobiana de 3-trifluormetil(oxo)-pirimido[1,2-a]benzimidazóis
(Universidade Federal de Santa Maria, 2005-02-15)
This work presents the synthesis of a series of 3-trifluormethyl(oxo)-pyrimido[1,2-a]benzimidazoles from the cyclocondensation reaction between 2-amino-1H-benzimidazol and 4-alcoxy-1,1,1-trihalo-3-alquen-2-ones.
The ...
Desenvolvimento de método multirresíduo para determinação de agrotóxicos em suco de uva integral utilizando método QuEChERS acetato e LC-MS/MS
(Universidade Federal de Santa Maria, 2021-02-26)
In the last century, pesticides have been widely used in agriculture due to the many benefits related to the quality and quantity of crops produced. Although they contribute to pest control and increased productivity, the ...
Agregação e força de interação cátion-ânion de líquidos iônicos dicatiônicos derivados do imidazol com os ânions ascorbato e ibuprofenato
(Universidade Federal de Santa Maria, 2021-01-29)
Imidazolium-based ionic liquids (ILs) demonstrate some advantages over the monocationic analogues, as higher fusion temperature, higher thermal stability and less toxicity. Dicationic ILs also form tridimensional aggregates ...
Síntese, caracterização e aplicação biológica de complexos derivados de bismuto(III) com ligantes do tipo aroiltioureias
(Universidade Federal de Santa Maria, 2020-03-06)
This work describes the synthesis, structural characterization and biological applications of four new bismuth(III) compounds with aroylthioureas as ligands: 1 - [Bi(La-O,S)3(HLa-S)], 2 - [Bi2(Lb-O,S)4(-Lb-12O,S,2 ...
Espectrometria de absorção atômica com tubo aquecido na chama e amostragem direta de sólidos para determinação de manganês e níquel em coque de petróleo
(Universidade Federal de Santa Maria, 2009-07-28)
A solid sampling flame furnace atomic absorption spectrometry (SS-FF-AAS)
system was developed in this work for Mn and Ni determination in petroleum coke.
The proposed solid sampling system was made in quartz, with two ...
Physical-chemical study of effects of functional groups on adsorption of naphthalene and its derivatives onto high-density polyethylene microplastics
(Universidade Federal de Santa Maria, 2023-03-15)
Microplastics (MP) have received great attention due to the mass-produced
residues discharged into the environment. MP are ideal for adhering to organic pollutants
that can be easily dispersed, thus posing risks to human ...
Síntese de derivados do estigmasterol e do ácido ursólico e avaliação de suas atividades biológicas
(Universidade Federal de Santa Maria, 2014-02-28)
The present work describes the synthesis of twenty-two new derivatives (4-25) from stigmasterol (1) and seven new derivatives (26-32) from ursolic acid (2) via esterification and coupling reactions with different amino ...
Síntese, análise estrutural e caracterização de seleninatos de manganês (II)
(Universidade Federal de Santa Maria, 2012-03-09)
In this study three novel compounds were synthesized and characterized from pre-ligands phenylseleninic acid 1, 4-methylphenyilseleninic acid 2 , 4-chlorophenylseleninic acid 3 and 4-bromophenylseleninic acid 4. The reactions ...
Hidratação reversível de complexos fenilseleninatos para- substituído de cobalto(II)
(Universidade Federal de Santa Maria, 2013-08-30)
In this study eight novel compounds were synthesized and characterized from pre-ligands pheylseleninic acid 1, 4-t-butiphenyilseleninic acid 2, 4-methylphenyilseninic acid 3 and 4-clorophenylseleninic acid 4. The ability ...