Buscar
Itens para a visualização no momento 21-30 of 91
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 ...
A formação histórica e socioespacial da cidade de São João do Polêsine - RS
(Universidade Federal de Santa Maria, 2005-02-17)
The analysis of the historical formation and sociospacial of the São
João do Polêsine city, in the State of Rio Grande do Sul - Brazil,
approaches the theme of the discussion of the urban space and your
understanding ...
O uso de ambientes informatizados na Educação Matemática: atividades de Geometria Euclidiana Plana com o uso do software Cabri-Géomètre II
(Universidade Federal de Santa Maria, 2005-07-11)
Avaliação do uso de laboratórios informatizados em escolas públicas de Santa Maria
(Universidade Federal de Santa Maria, 2005-01-14)
This work was a study about information technology in public schools from Santa Maria city. It
was used a sample, obtaining a minimal one of 303 teachers, divided proportionally in 214
teachers of eight state schools ...
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 ...