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Efeito da presença e concentração de compostos carbonílicos na qualidade de vinhos
Azevêdo,Luciana C. de; Reis,Marina M.; Silva,Luciana A. da; Andrade,Jailson B. deStudies on identification of compounds that make up the aroma and flavor in wines involve research evaluating mainly the influence of terpenes, esters, lactones and alcohols upon these sensory characteristics. However, carbonylic compounds (CC) play an important role concerning the substances that impact aroma to these drinks. Their origin is reported to be linked to the grape's chemical composition, must ferme...
Use of Cu2+ as a metal ion probe for the EPR study of metal complexation sites ...
Silva,Luciana A.; Andrade,Jailson B. de; Mangrich,Antonio S.An evaluation was made of the presence of paramagnetic ions in the host lattice of CuI2SO3.CdII SO3.2H2O by the electron paramagnetic resonance (EPR) technique, using copper(II) ions as paramagnetic probes. The existing M I and M II complexation sites in the double sufite structure were successfully differentiated. The results indicate that the CuI2SO3.CdII SO3.2H2O structure was doped with CuII ions in the two...
O impacto do diagnóstico citológico de atipiasi indeterminadas no sistema públi...
Pereira, Sónia Maria Miranda; Yamamoto, Luzia S. U.; Loreto, Celso di; Silva, Luciana A.; Makabe, Sérgio; Marques, João A.As alterações citológicas de significado indeterminado representam uma importante limitação diagnóstica nos programas de escrutíneo de lesões cérvico-vaginais. A introdução de métodos biomoleculares, como o sistema de captura híbrida para detecção de HPV de alto risco contribui para a otimização da conduta clínica dessas pacientes, indicando colposcopia com precisão. Objetivo: avaliar o significado de lesões de...
Isomorphic series of double sulfites of the Cu2SO3.MSO3.2H2O (M = Cu, Fe, Mn, a...
Silva,Luciana A. da; Andrade,Jailson B. deAlthough the first mixed valence double sulfite, Cu2SO3.CuSO3.2H2O, was prepared in the early 19th century by M. Chevreul, interest in this type of compound was only rekindled in the mid-1960s, when the crystalline structure of Chevreul's salt was determined and its infrared spectrum characterized. Studies of this type of compound have been intensified in recent years, especially after the discovery that the is...
Electronic Spectra of Chevreul's Salts
Silva,Luciana A. da; Andrade,Jailson B. de; Toma,Henrique E.The isomorphic series of double sulfites with empirical formula Cu2SO3.MSO3.2H 2O (where M is Cu, Fe, Mn, or Cd) have been prepared from the Cu(II) replacement by transition metal ions such as Mn(II), Fe(II) and Cd(II) ions in Chevreul's salt, Cu2SO3.CuSO3.2H 2O. As a consequence, the isomorphic species present distinct colors. Molecular modeling calculations were carried out for the dimeric [CuI2(SO3) 2(SO...
Meninas bem-comportadas, boas alunas; meninos inteligentes, indisciplinados
Silva,Cármen A. Duarte da; Halperni,Fernando Barros E Sílvia C; Silva,Luciana A. Duarte daEstudo longitudinal vem acompanhando todas as crianças nascidas em Pelotas, Rio Grande do Sul, no ano de 1982. Suas trajetórias escolares mostraram-se fortemente determinadas pela variável gênero, mesmo quando eliminados por estatística outros fatores intervenientes. Um estudo com 84 professoras/es buscou identificar que processos estão presentes na escola e nas representações que ajudem a compreender essas dif...
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