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Síntese de 1h-1,2,3-triazol-4-il-1,3,4-oxadiazóis a partir de 4-alcóxi-1,1,1-tricloro-3-alquen-2-onas
(Universidade Federal de Santa Maria, 2014-09-12)
This work describes the synthesis and the characterization of series of substituted trichloroacetyl 1H-1,2,3-triazoles (10 12), 1H-1,2,3-triazol-4-yl-carbohydrazides (14 16) and 1H-1,2,3-triazol-4-yl-1,3,4-oxadiazoles ...
Determinação de flavonóides e resveratrol em vinho empregando cromatografia de fluxo turbulento-LC-MS
(Universidade Federal de Santa Maria, 2008-03-10)
Wine is known for its favorable biochemical properties such as antioxidant, anticarcinogenic and anti-inflamatory properties. Many of these properties can be assigned to flavonoids and resveratrol. Wine is known to contain ...
Obtenção de novos heterociclos derivados do ácido levulínico
(Universidade Federal de Santa Maria, 2013-09-30)
This study describes the attainment of twenty three (23) bis-heterocycles derived from the Levulinic Acid: Bis-Pyrazoles (6a-k) by the reaction of cyclecondensation between the 3-(5-(trifluoromethyl)-4,5-dihydro-1H-pyraz ...
Obtenção quimiosseletiva de trialometil-β-dicetonas via reações de acilação de acetais
(Universidade Federal de Santa Maria, 2009-02-27)
This work presents an Acylation Method of Acetals applied to the quimioseletive obtention of trifluormethyl-β-diketones, incluing acetals derived from not symmetrical ketones and functionalized substituents. Five known ...
Obtenção regiosseletiva de 5-alquil(aril/heteroaril)-3- (carboxil/trifluormetil)-1h-1-fenilpirazóis
(Universidade Federal de Santa Maria, 2011-05-19)
This paper presents a new synthetic route for obtain regioselective 5-alkyl(aryl/heteroaryl)-3-trifluoromethyl-1H-1-phenylpyrazoles (3a-e) (50-85% yields) and 5-alkyl(aryl/heteroaryl)-3-carboxialkyl-1H-1-phenylpyrazoles ...
Determinação multirresíduo de agrotóxicos em berinjela empregando método QuEChERS e UHPLC-MS/MS
(Universidade Federal de Santa Maria, 2022-09-05)
The intensive use of pesticides in agriculture, especially herbicides, insecticides and
fungicides, aims to control pests and diseases in order to increase production. On the
other hand, consumers of these products can ...
Determinação de metais em matrizes oleosas por HR-CS AAS após extração induzida por quebra de emulsão
(Universidade Federal de Santa Maria, 2022-08-29)
Three methods based on extraction induced by emulsion breaking were developed for
the extraction and determination of metals in asphalt and oilseeds by high-resolution
continuum source atomic absorption spectrometry with ...
Nanopartículas de copolímero em bloco de maltoheptaose-b-polimetilmetacrilato contendo ftalocianina de cloro-alumínio para o uso em terapia fotodinâmica
(Universidade Federal de Santa Maria, 2022-08-09)
New nanocarriers have been contributing to the development of so-called third-generation
photosensitizers for use in photodynamic therapy (PDT). Chloro-aluminum phthalocyanine
(ClAlPc) is a promising second-generation ...
Determinação de resíduos de agrotóxicos em manga empregando método QuEChERS e UHPLC-MS/MS
(Universidade Federal de Santa Maria, 2022-03-16)
Pesticides are applied from the development of the plant to its production, transport and storage. When not applied correctly, these chemicals can cause harm to human health and the environment. Thus, this work aimed to ...
Desenvolvimento de sistema para piroidrólise para o preparo de papelão hidráulico visando a determinação de halogênios
(Universidade Federal de Santa Maria, 2014-08-14)
A pyrohydrolysis system was developed for sample preparation for halogen
determination in hydraulic cardboard. These materials are used for sealings,
mainly engines and nuclear reactors. Because of the contact of the ...