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Determinação multirresíduo de agrotóxicos em tabaco empregando método QuEChERS modificado e UHPLC-MS/MS
(Universidade Federal de Santa Maria, 2022-05-27)
Tobacco is the most widely grown non-food crop in the world, a wide variety of substances are used in it during and after its cultivation to protect it from pests, diseases and regulate its growth. Therefore, it is necessary ...
Especiação de enxofre orgânico em cimento asfáltico de petróleo e suas frações
(Universidade Federal de Santa Maria, 2022-07-22)
The asphalt binder is composed mostly of aromatic hydrocarbons. However, the presence of sulfur in the matrices warrant special attention, since it stands out for being the major heteroatom. Sulfur compounds are known for ...
Síntese estereosseletiva de tioespiro[4.n]alcanonas e reatividade de (E)-1-(3-benzilideno-2-metoxiciclohexenil)-2,2,2- trifluoretanona
(Universidade Federal de Santa Maria, 2022-05-06)
The present thesis initially describes a methodology for obtaining two series of
diastereoisomers of 1-aryl-4-hydroxy-2-thiaspiro[4,5]alkan-6-ones (5a-k and 6a-k), totaling 22
novel compounds by sulfa-Michael addition ...
Determinação de metais em matrizes oleosas por HR-CS AAS após extração induzida por quebra de emulsão
(Universidade Federal de Santa Maria, 2022-08-29)
Three methods based on extraction induced by emulsion breaking were developed for
the extraction and determination of metals in asphalt and oilseeds by high-resolution
continuum source atomic absorption spectrometry with ...
Avaliação das emissões de hidrocarbonetos policíclicos aromáticos e seus derivados a partir de matrizes asfálticas
(Universidade Federal de Santa Maria, 2022-10-24)
Asphalt is a product of petroleum, basically consisting of hydrocarbons, which may contain
heteroatoms such as sulfur, oxygen and nitrogen in their structure. In the application of asphalt
on a road bed, it is subjected ...
Análise fitoquímica de Luehea divaricata (Martius) e Symplocos uniflora (Benth) - e suas potenciais atividades biológicas
(Universidade Federal de Santa Maria, 2022-08-28)
Luehea divaricata (Malvaceae) and Symplocos uniflora (Symplocaceae), better known as
“açoita-cavalo” and “sete sangrias”, respectively, are native Brazilian species from pampa
biome with few reports in the literature. ...
Novos corantes derivados de vinil-calcogenil fenotiazinas: síntese e estudo das propriedades fotofísicas e eletroquímicas
(Universidade Federal de Santa Maria, 2022-10-21)
This work presents the synthesis and studies of photophysical and electrochemical
behaviour of new phenothiazines derivatives containing the vinyl-chalcogenyl group in
different positions of the heterocyclic. This research ...
Síntese e aplicação de pirazóis na construção de poliheterociclos com potencial bioatividade
(Universidade Federal de Santa Maria, 2022-09-06)
This work reports the synthesis of eight series of substituted trifluoromethyl
heterocycle compounds, based on the synthetic versatility and regioselectivity of 4-
alkoxy(amino)-5-bromo-1,1,1-trifluorpent-3-en-2-ones in ...
Síntese e avaliação anti-SARS-CoV-2 e fotofísica dos 1,10- fenantrolina-4,5-imidazo-benzocalcogenazóis
(Universidade Federal de Santa Maria, 2022-08-29)
In this work, a new serie of 1,10-phenanthroline-4,5-imidazo-benzochalcogenazoles 5a-h/
6a-g obtained through the Debus-Radziszeski condensation was synthesized.
Benzoxazoles and benzothiazoles were previously synthesized ...
2-amino-3-arildiazenil-pirazolo[1,5-a]pirimidinas trifluormetilsubstituídas: síntese, derivatizações e avaliação das propriedades fotofísicas
(Universidade Federal de Santa Maria, 2022-08-19)
This thesis presents the results on the synthesis, structural study, and evaluation of the photophysical
properties of new (E)-5-(alkyl/aryl/heteroaryl)-2-amino-3-(aryldiazenyl)-7-(trifluoromethyl)pyrazolo[1,5-
a]pyrimidine ...