Synthesis, thermal behavior and spectroscopic study of trivalentlanthanide and yttrium(III) α-hydroxyisobutyrates, in solid state

Thermal and spectroscopic studies on solid trivalent lanthanides and yttrium(III) α-hydroxyisobutyrates, Ln(C4H7O 3)3·nH2O were investigated employing simultaneous thermogravimetry and differential thermal analysis (TG-DTA), elemental analysis, X-ray diffractometry, complexometry, experimental and theoretical infrared spectroscopy and TG-DSC coupled to FTIR. The dehydration of lanthanum to neodymium and terbium to thulium and yttrium compounds occurs in a single step while for samarium, europium and gadolinium ones it occurs in three consecutives steps. Ytterbium and lutetium compounds were obtained in the anhydrous state. The thermal decomposition of the anhydrous compounds occursin two consecutives steps, except lanthanum (five steps) and cerium (single step), with formation of the respective oxides CeO2, Pr6O 11, Tb4O7 and Ln2O3 (Ln = La, Nd to Lu and Y), as final residue. The resultsalso provided information concerning the composition, thermal behavior, crystallinity and gaseous products evolved during the thermal decomposition. The theoretical and experimental spectroscopic data suggested the possible modes of coordination of the ligand with the lanthanides.© 2013 Elsevier B.V.

Selecting for rust (Puccinia psidii) resistance in Eucalyptus grandis in São Paulo State, Brazil

In Brazil, Eucalyptus grandis is a key species for wood production. However, some genotypes are susceptible to rust (Puccinia psidii), mainly in São Paulo State, where climatic conditions are favorable for its development. Rust represents a high economic risk to forest companies because of the high potential of damage to commercial eucalypt plantations. The aims of the present study were (i) to select progenies of E. grandis for stability and adaptability regarding resistance to rust at different locations; (ii) compare the selections under these different climatic conditions; and (iii) compare rust severity in the field with the theoretical model. We observed that climatic conditions were extremely influential factors for rust development, but even under favorable conditions for disease development, we found rust-resistant progenies. In sites unfavorable for rust development, we detected highly susceptible progenies. We found significant correlation among the genetic material, environmental conditions and disease symptoms, however, we observed a simple genotype-environmental interaction and significant genetic variability among the progenies. The average heritability was high among the progenies in all sites, indicating substantial genetic control for rust resistance. We also observed a good relationship between rust severity in the field and the theoretical model that considered annual average temperature and leaf wetness. © 2013 Elsevier B.V.

Informe final del Seminario con Viaje de Estudio sobre la Eficiencia del Mantenimiento de Ferrocarriles en la Unión Soviética

Presenta el desarrollo del programa, las conclusiones y recomendaciones del seminario con viaje de estudio a diversas regiones de la URSS, que tuvo como principal objetivo complementar los esfuerzos de la CEPAL y de la ALAF para promover la cooperación técnica entre los países de América Latina en la esfera de la administración ferroviaria.

Influência do hormônio tireoidiano e da restrição alimentar sobre dano de DNA em animais obesos

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Intelectualidade e imprensa negra paulista: os casos do Getulino e Progresso (1923-1931)

Pós-graduação em História - FCLAS

O uso de tarefas comunicativas e pré-comunicativas no ensino de língua inglesa em uma faculdade particular

Pós-graduação em Estudos Linguísticos - IBILCE

Social cohesion: inclusion and a sense of belonging in Latin America and the Caribbean. Summary

Includes bibliography

Orquestra Sinfônica de Ribeirão Preto (SP): representações e significado social

Pós-graduação em Música - IA

Protocolos de adaptação à dietas com alta inclusão de concentrados para bovinos nelore confinados

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Levedura como pronutriente em dietas de matrizes e alevinos de Tílápia-do-Nilo

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Níveis de clinoptilolita e cálcio na dieta de poedeiras comerciais no final do primeiro ciclo de produção

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Concentração nas olimpíadas colegiais do estado de São Paulo: estudo de caso sobre a reclusão esportiva à luz da psicologia do esporte

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Análise da produtividade e rentabilidade de lavouras cafeeiras agroquímica e orgânica na região da Alta Paulista

Pós-graduação em Agronomia (Energia na Agricultura) - FCA

Compreensões de conceitos de cálculo diferencial no primeiro ano de matemática: uma abordagem integrando oralidade, escrita e informática

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)