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Determinação de resíduos de herbicidas em diferentes variedades de arroz (branco, preto e vermelho) empregando método QuEChERS e LC-MS/MS
(Universidade Federal de Santa Maria, 2019-02-28)
Rice is the main component of the basic diet of the world population. This food is of utmost importance for world food security. Therefore, aspects related to its production and consumption must be continuously monitored ...
Determinação de resíduos de agrotóxicos em azeite de oliva e azeitonas empregando método QuEChERS e UHPLC-MS/MS
(Universidade Federal de Santa Maria, 2019-08-03)
Commonly used in the Mediterranean diet, olive oils and table olives have become more frequent in the everyday meals of the Brazilian consumer. Despite the small consumption per capita, the country is already the second ...
Síntese de compostos contendo núcleos de pirimidínicos derivados de β-enaminodicetonas
(Universidade Federal de Santa Maria, 2019-03-22)
In this work the reactivity of β-enaminodiketones [RC(O)C(=CHNMe2)C(O)R1], (wher R= C6H5, 4-Me-C6H4, 4-OMe-C6H4, 4-Cl-C6H4 4-NO2-C6H4, thien-2-yl and furan-2-yl) and R1 (CF3 and CO2Et), was studied with dinucleophiles such ...
Determinação de resíduos de agrotóxicos em leite em pó empregando dispersão da matriz em fase sólida, GC-MS/MS e UHPLC-MS/MS
(Universidade Federal de Santa Maria, 2019-07-31)
The milk powder is a food of complex composition (protein, fat, carbohydrate, vitamins,
etc.). It plays a fundamental role in child nutrition due to nutritional factors related to
cognitive ability. In recent years, ...
Desenvolvimento de método para remoção de água, sal e sedimento de petróleos do pré-sal empregando radiação micro- ondas
(Universidade Federal de Santa Maria, 2019-03-27)
In this work was developed a method for removal of water, salt and sediment of pre-
salt crude-oil employing microwave radiation in close system, it was used oil in water
emulsions with intermediated crude oils (26,7 ...
Avaliação das condições de extração para posterior especiação de arsênio em alimentos por LC-ICP-MS
(Universidade Federal de Santa Maria, 2019-07-29)
Arsenic is a toxic element with carcinogenic and mutagenic characteristics. However,
its toxicity is associated with their species, because some present different toxicities.
In this sense, speciation analysis is mandatory ...
Métodos analíticos para identificação e quantificação de espécies salinas e sedimentos em petróleo
(Universidade Federal de Santa Maria, 2019-07-18)
In this work, the ASTM D 4807 standard method combined with scanning electron microscopy (SEM) was used and evaluated for the identification of the morphology and composition of saline species present in sediments isolated ...
Formação da ligação carbono-carbono envolvendo organocalcogênios catalisada por metais de transição
(Universidade Federal de Santa Maria, 2019-02-22)
In this thesis we developed a methodology for carbon-carbon bond formation via a cross-coupling reaction between classical nucleophiles and organoselenium electrophiles catalyzed by transition metals. The fact that ...
Síntese de derivados de selenofenos e 4H-selenocromeno via reações de ciclização eletrofílica
(Universidade Federal de Santa Maria, 2019-07-26)
This work reports the synthesis of a series of selenium heterocyclics containing in it’s
core structure. These compounds are obtained through intramolecular electrophilic
cyclization reactions of alkynyl substrates and ...
Processo de nanoemulsificação de óleos essenciais assistido por ultrassom
(Universidade Federal de Santa Maria, 2019-03-26)
Essential oils are volatile oils obtained from plants by physico-chemical extraction
processes. To overcome the hydrophobicity of essential oils, and allows their
dispersion in an unfavorable environment, many researchers ...