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Mosaicos de cargas elétricas e grandes gradientes de potencial em superfícies dielétricas formados pela evaporação de líquidos
(Universidade Federal de Santa Maria, 2020-03-06)
This work presents a study on the charge transfer of the automatic micropipette and the glass microsyringe with the grounded and ungrounded metallic part when dripping with different liquids and also when applying different ...
Síntese de 1-(selenobutil)-2-fenil-4h-selenofeno[2,3-c]cromenos via reação de ciclização cascata mediada por FeCl3
(Universidade Federal de Santa Maria, 2020-02-21)
The synthesis of heterocyclic compounds is of great importance within the
chemistry of materials and the biological area, targeting both the chemical industry and
the pharmaceutical industry. Among the different heteroatoms ...
Determinação de resíduos de agrotóxicos em café verde empregando QuEChERS e UHPLC-MS/MS
(Universidade Federal de Santa Maria, 2020-03-02)
Coffee is one of the most consumed beverages in the world and due to climatic diversity, reliefs, altitudes and latitudes Brazil is able to produce good quality coffee beans. Brazil is currently the largest producer and ...
Síntese de α-metileno-β-lactamas via ciclização intramolecular de n-propiolamidas catalisada por t-BuOK e sua funcionalização via arilação de Heck catalisada por paládio
(Universidade Federal de Santa Maria, 2021-04-30)
The present work describes the regio- and stereoselective synthesis of α-methylene-β-lactams through intramolecular cyclization of different N-propiolamides catalyzed by potassium tert-butoxide. The same, in catalytic ...
Determinação de As, Cd, Hg E Pb em mel empregando combustão iniciada por micro-ondas e ICP-MS
(Universidade Federal de Santa Maria, 2020-03-19)
In this work, a microwave-induced combustion (MIC) method was proposed for the decomposition of honey, aiming at As, Cd, Hg and Pb determination by ICP-MS. Parameters such as sample mass (with or without the use of combustion ...
Especiação de níquel e cobalto em águas estuarinas do Amazonas empregando voltametria de redissolução
(Universidade Federal de Santa Maria, 2020-09-24)
The estuaries are defined as the region of mixing fresh water from the river and sea water. They are characterized as dynamic ecosystems inserted in a complex hydrographic network. Among the estuaries, the Amazon River ...
β-enaminocetonas trialometil substituídas: síntese, estrutura e propriedades fotofísicas de quelatos difluororganoboro e reações de ciclocondensação intramoleculares
(Universidade Federal de Santa Maria, 2020-03-27)
This work shows the synthesis, spectroscopic structural characterization,
microbiological properties determination, photophysical, and the DNA bonds of the new
difluorooraganoboron compounds, wich are BODIPYs derivatives ...
Avaliação de métodos analíticos para estudos em material biológico de ratos submetidos ao tratamento com nanotubos de carbono
(Universidade Federal de Santa Maria, 2020-05-27)
In this work, methods for the analysis of tissues, fluids and furs of rats submitted to the treatment with carbon nanotubes (CNTs) were evaluated, allowing to identify where they are concentrated, indirectly, by the ...
Conversão fermentativa de microalga Chlorella sp. em goma gelana por Sphingomonas paucimobilis
(Universidade Federal de Santa Maria, 2020-01-30)
Microalgae (MA) are potential feedstock for the production of fermentable monosaccharide, due to the appreciable carbohydrate fraction. The species used in this dissertation was Chlorella sp., one of the most resistant ...
Estudo da natureza de interações químicas do tipo calcogênio e halogênio mediante o estudo da estrutura eletrônica e da teoria quântica de átomos em moléculas
(Universidade Federal de Santa Maria, 2021-08-27)
In this work we present the results of a systematic analysis of the electronic structure of different chemical systems, through the Density Functional Theory (DFT), for the study of the nature of chemical bonds involving ...