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Itens para a visualização no momento 11-20 of 42
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 ...
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 ...
Desenvolvimento de método para determinação multirresíduo de agrotóxicos em ovos empregando método QuEChERS e UHPLC-MS/MS
(Universidade Federal de Santa Maria, 2020-02-28)
The egg is one of the most consumed foods in the world and it has a complex
composition due to the amount of proteins, lipids, vitamins and minerals present in it,
which makes it difficult to extract compounds from this ...
Síntese, caracterização e aplicação de compostos contendo oxiânions de selênio
(Universidade Federal de Santa Maria, 2020-02-18)
This work describes the synthesis and structural characterization of five new coordination compounds containing, as an inorganic ligand, the selenite and hydrogen selenite anion. The compounds [Zn4(μ-SeO3)2(μ4-SeO3)2(bipy)4]·11H2O ...
Determinação multirresíduo de agrotóxicos em tomate, beterraba e cenoura empregando QuEChERS modificado e UHPLC-MS/MS
(Universidade Federal de Santa Maria, 2020-04-17)
Beet, carrot and tomato are foods with a high content of water, sugars and pigments, which are among the most cultivated and consumed vegetables worldwide and frequently contain pesticide residues. Therefore, a simple ...