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Uso de modelos multivariados para a avaliação do valor de dienos em amostras de gasolina de pirólise
(Universidade Federal de Santa Maria, 2005-12-19)
The quality of gasoline may be affected by the presence of several compounds. Among them, the conjugated dienes play an important role due to the fact that their presence is strongly associated with gum formation, which ...
Vidro de spin e antiferromagnetismo com interacão de pareamento BCS local
(Universidade Federal de Santa Maria, 2005-07-12)
In this work the competition among spin glass(SG), antiferromagnetism (AF) and BCS pairs formation (PAIR) in real space is investigated. The model consists of an Ising spin glass term and a local BCS term that favors double ...
Determinação de cloridrato de propranolol em medicamentos por espectroscopia no infravermelho com calibração multivariada (PLS)
(Universidade Federal de Santa Maria, 2005-07-21)
In this work calibration multivariate models were developed with the use of the technique of partial least scores (PLS) for the dosage of tablets of propranolol hydrochloride using infrared spectroscopy. Samples were ground ...
Síntese e cristaloquímica de complexos de mercúrio(ii) com o ligante 1-(3-trifluorometilfenil)-3-(3-nitrofenil)triazeno
(Universidade Federal de Santa Maria, 2005-08-01)
This work shows the crystaline/molecular structure of two mercury(II) complexes with a same monocateneted triazene ligand previolsly deprotonated. The reaction between mercury(II) acetate, 1-(3-nitrophenyl)-3-(3-trifluor ...
Estudo fitoquímico e da atividade biológica de Zanthoxylum rhoifolium
(Universidade Federal de Santa Maria, 2005-08-12)
Four previously known dihydrobenzophenanthridine alkaloids,
Dihydrochelerythrine (39), Bocconoline (42), Chelerythrine (2) and 6- Acetonyldihydrochelerythrine (33), were isolated from the stem bark of Zanthoxylum rhoifolium, ...
Uso de K-10 e irradiação de microondas no estudo da metodologia de transesterificação e na síntese de β-enamino ésteres
(Universidade Federal de Santa Maria, 2005-05-20)
Due to the high chemical versatility of β-keto esters and the β-enamino carbonylic compounds as synthetic precursors, our research group has investigated and developed methodologies for their synthesis and reactivity. In ...
Reação de alquinos terminais com 1,1,1-trialo-4-alcóxi-3- alquen-2-onas
(Universidade Federal de Santa Maria, 2005-02-21)
In this work a convenient method of synthesis of 9 eninones is presented, through the reaction of different acetylenes (phenylacetylene, 1-heptyne and 1-hexyne) with n-butillithium and subsequently with electrophiles ...
Poiretia latifolia e Poiretia tetraphylla: estudo dos óleos voláteis e atividades biológicas preliminares
(Universidade Federal de Santa Maria, 2005-01-21)
The essential oils from the aerial parts of leaves and flowers of Poiretia latifolia and Poiretia tetraphylla, were analysed by GC, GC/MS and Enantioselective Gas Chromatography (EGC). Forty five constituents were identified ...
Síntese de 7-trifluormetil-5,6-diidrobenzo[c]acridinas
(Universidade Federal de Santa Maria, 2005-02-28)
This work describes the reactions of 1-methoxy-2-trifluoroacetyl-3,4-dihydro-naphthalene (4) with substituted anilines 5a-j to obtain a series of N-aril-2-trifluoroacetyl-3,4-diidronaphtalenes (6a-j). Intramolecular ...
Síntese de 2-[5-Aril-3-(E-estir-1-il)-4,5-Diidro-1H-pirazol-1-il]-4-Fenil-6-Trifluormetilpirimidinas
(Universidade Federal de Santa Maria, 2005-08-15)
The synthesis of a series of 2-[5-aryl-3-(E-styr-1-yl)-4,5-dihydro-1H-pyrazol-1-yl]-4-phenyl-6-trifluoromethylpyrimidines (where aryl = C6H5, 2-MeC6H4, 2-MeOC6H4, 4-MeOC6H4, 3,4-(MeO)2C6H3, 3,4,5-(MeO)3C6H2, 4-ClC6H4) in ...