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Estudo de reações de flúor-inserção em 1H-pirazóis utilizando os reagentes fluorantes selectfluor, DAST e MFSDA
(Universidade Federal de Santa Maria, 2015-08-19)
This thesis describes the studies carried out using fluorinating reagents with different approaches: Selectfluor as an electrophilic fluorine source; DAST for nucleophilic fluorinations and MFSDA as a nucleophilic ...
Determinação de resíduos e contaminantes em rações empregando extração sólido-líquido e UHPLC-MS/MS
(Universidade Federal de Santa Maria, 2022-11-18)
Animal feed is considered as any material of vegetable, animal or mineral origin
suitable to be consumed as food, provided it meets the quality and identity standards,
as well as sanitary and nutritional standards. Also ...
Determinação multiclasse de contaminantes em suplemento alimentar à base de óleo de peixe por GC-MS/MS
(Universidade Federal de Santa Maria, 2022-10-26)
In recent years, the demand for fish oil-based supplements has increased significantly, which
can be mainly attributed to the high concentrations of polyunsaturated fatty acids present in
fish, which are associated with ...
Determinação de farmacos em efluentes hospitalares utilizando UHPLC-QTOF MS, UHPLC-MS/MS e avaliação dos quocientes de risco ambiental
(Universidade Federal de Santa Maria, 2023-10-02)
One of the main sources of pollution of aquatic systems by drugs is the incorrect
disposal of hospital effluents (HWW). The HWW matrix is quite complex and
therefore its analysis is a challenge, in this context, sample ...
Materiais funcionais de baixo custo como transdutores de energia: triboeletricidade, flexoeletricidade e higroeletricidade
(Universidade Federal de Santa Maria, 2023-10-25)
The growing energy demand worldwide in recent decades and the limited availability
of fossil fuels and global warming have made the search for new sustainable and
environmentally friendly energy sources one of society's ...
Complexos de vanádio(V) derivados de trifenilfosfônios e hidrazidas: avaliações estruturais, interações com dna e hsa e potencialidades citotóxicas
(Universidade Federal de Santa Maria, 2023-12-20)
The development of new drugs and prodrugs with antiprotozoal, antibacterial, and antineoplastic therapeutic actions is currently focused on non-covalent and reversible interactions with deoxyribonucleic acid. In this effort, ...
Determinação simultânea de agrotóxicos e micotoxinas em fitoterápicos: Validação e aplicação de métodos multirresíduo empregando LC-MS/MS
(Universidade Federal de Santa Maria, 2023-02-27)
The use of herbal medicines has increased significantly, but the presence of pesticide residues as well as the presence of mycotoxins have generated constant discussion and concern on the part of regulatory agencies. The ...
Tuning, mechanistic routes and performance amplification of microwave-responsive iron/copper carbonaceous heterostructures in the degradation of pharmaceutical substances
(Universidade Federal de Santa Maria, 2024-02-22)
A presença crescente de fármacos como poluentes em ecossistemas globais é atribuída ao
aumento do uso dessas substâncias, com as estações de tratamento de água e esgoto
incapazes de removê-las. O interesse de pesquisa ...
Síntese de 3 e 4-(organosselenil)-quinolinas via reações de ciclização intramolecular
(Universidade Federal de Santa Maria, 2024-03-27)
Quinolines are important heterocycles, where many molecules that have biological and pharmacological activities constitute this quinoline nucleus, driving more and more studies on the synthesis of these compounds. In the ...
Síntese de benzo[b]tiofenos funcionalizados com organocalcogênios usando selectfluor® como agente oxidante
(Universidade Federal de Santa Maria, 2024-03-15)
In the present work, two methodologies were developed for obtaining benzo[b]thiophene derivatives containing organochalcogens as substituents from the electrophilic cyclization of alkynes using diorganoyl dichalcogenides ...