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Determinação de fungicidas em sucos de laranja empregando método de extração mini-luke modificado e UPLC-MS/MS
(Universidade Federal de Santa Maria, 2014-03-26)
Orange juice is a relevant contribution to the Brazilian economy, as long as five glasses of orange juice consumed in the world, three are produced in Brazil. For the purpose of increase the production of fruits and, ...
Alcaloides ciclopeptídicos de Scutia buxifolia e suas atividades antimicrobianas
(Universidade Federal de Santa Maria, 2014-04-29)
The phytochemical investigation of the stem bark of the specie Scutia buxifolia (Rhamnaceae) led to the isolation of four cyclopeptide alkaloids: scutianine C (14) and three diastereoisomer of scutianine H (19), isolated ...
Avaliação de métodos de decomposição de chocolate e determinação de metais por ICP-OES e ICP-MS
(Universidade Federal de Santa Maria, 2014-02-13)
In this work, was evaluated the main methods of sample preparation reported in the literature for decomposition of chocolate and, in addition, was proposed the decomposition by microwave induced combustion (MIC) for further ...
Determinação de glifosato e ampa em água por injeção direta da amostra em cromatografia iônica capilar e LC-MS/MS
(Universidade Federal de Santa Maria, 2014-08-29)
Glyphosate [N-(phosphonomethyl) glycine] is the most widely used pesticide in the world for controlling weeds in agriculture. High amounts of this herbicide and its major metabolite, aminomethylphosphonic acid (AMPA), have ...
Síntese verde e versátil de calcogenol ésteres e avaliação da atividade antibacteriana
(Universidade Federal de Santa Maria, 2014-08-30)
The present work aims the synthesis of chalcogenoesters, by a green and
versatile methodology, using low cost and non-toxic reagents, as well as the
biological activity of this kind of compounds, as antibacterial agents.
By ...
1,3,4-oxadiazóis: estratégias para síntese e derivatização a partir do ácido 4-oxopentanóico
(Universidade Federal de Santa Maria, 2014-12-19)
This study shows strategies to prepare 1,3,4-oxadiazoles and derivatives from 4-oxopentanoic acid is reported. The compounds 4-(2-(5-substituted-1,3,4-oxadiazol-2-yl)ethyl)-2-(methylthio/phenyl)-6-(trifluoromethyl)pyrimidine; ...
Determinação de resíduos de avermectinas em leite bovino empregando QuEChERS modificado e UHPLC-MS/MS
(Universidade Federal de Santa Maria, 2014-07-02)
In Brazil, agro-industry is one of the most important economic sectors. However, there is a need for improved and more efficient quality control techniques in some areas, including the milk sector. This study employed an ...
Plataforma de detecção eletroquímica para avaliação da habilidade quelante do cobre por compostos naturais neuroprotetores
(Universidade Federal de Santa Maria, 2014-12-03)
Metal ion dysregulation or accumulation has been implicated in a number of diseases. As such, a rise in the search for potential therapeutic compounds that can attenuate the toxicity exerted by the accumulation of such ...
Estudo da atividade antioxidante in vitro e caracterização cromatográfica em extratos de plantas medicinais da Amazônia
(Universidade Federal de Santa Maria, 2014-03-12)
Most of the free radicals generated in the body is derived from oxygen and are associated with
the development of many diseases. Medicinal plants are a natural resource in the treatment
prevention of diseases and have ...
Otimização e validação de método individual para determinação de diquate e paraquate por UPLC-MS/MS em feijão-caupi
(Universidade Federal de Santa Maria, 2014-02-03)
In this study, a method for determination of diquat and paraquat in Cowpea was optimized and validated. In order to obtain a good homogeneous sample, the Cowpea were milled and then prepared a slurry of matrix and water ...