A comparative study of the non-isothermal degradation of natural rubber from Mangabeira (Hancornia speciosa Gomes) and Seringueira (Hevea brasiliensis)

Due to the increasing search for alternative sources of natural rubber (NR) whose properties are similar to Hevea brasiliesis, several sources have been studied in the past few years. Among them, Mangabeira (Hancornia speciosa Gomes), which is native to Amazon rainforest and other regions of Brazil, has a potential as another viable rubber source. As a continuation of a series of comparative studies between Hancornia and Hevea (clone RRIM 600) these two species by our research team, their thermal behavior was analyzed by thermogravimetry (TG) using Flynn-Wall-Ozawa's approach in order to obtain kinetic parameters (reaction order, pre-exponential factor and activation energy) of the decomposition process. Results indicated that the thermal behavior of NR from Hancornia was comparable to Hevea with some differences observed as follows: reaction order for Hancornia was higher than for Hevea at the beginning of degradation and very close for temperatures over 350 A degrees C; activation energy and pre-exponential factor had the same trend, i.e., increased with increasing degree of conversion remaining almost constant between 20 and 70% and then increasing for higher degrees, although Hevea was slightly more thermally stable than Hancornia. These major influences in the degradation process in the early stage are attributed to differences in non-rubber constituents present in these two species.

Comparative Study on the Technological Properties of Latex and Natural Rubber from Hancornia speciosa Gomes and Hevea brasiliensis

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

Water balance and locomotor performance in three species of neotropical toads that differ in geographical distribution

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

Paulo Emílio Salles Gomes: a compreensão da realidade brasileira através da crítica de cinema

O objetivo deste artigo é compreender o papel intelectual desempenhado por Paulo Emilio Salles Gomes na sociedade brasileira. Partindo da análise da sua crítica de cinema no jornal O Estado de São Paulo, nos anos 1950, busco caracterizar o processo de construção do empenho político e cultural voltado para a construção de uma sociedade democrática no Brasil, que se desdobrava nas análises sobre o cinema, e a realidade brasileira nas décadas de 1960 e 1970.

Anti-inflammatory intestinal activity of Abarema cochliacarpos (Gomes) Barneby & Grimes in TNBS colitis model

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

New species of Haplometroides (Digenea: Plagiorchiidae) from Phalotris nasutus (Gomes, 1915) (Serpentes, Colubridae)

A new species of Haplometroides (Digenea, Plagiorchiidae) is described from a specimen of Phalotris nasutus (Gomes, 1915) (Serpentes, Colubridae). The host snake was obtained in the municipality of Corumbá, Mato Grosso do Sul State, Brazil. Trematodes were recovered from esophagus, stomach, and small intestine of the host. The main characteristic of the new species is the vitellaria, which is intercecal, cecal, and extracecal in the preacetabular region. A key for identification of the species in Haplometroides is proposed. © American Society of Parasitologists 2007.

O meteorito condrítico Saulo Gomes

This paper aims to present the results of petrographic and lithochemical studies obtained in one of the three artifacts, which fell on the farm Buritis in Buritizal County in August 1967, which were collected and stored until the present by reporter Saulo Gomes. The petrographic analysis showed that the artifact is composed by spherical and irregular chondrules with serial granulometry and size averaging around 1 mm and the largest reaching about 6 mm in diameter. The chondrules are made of olivine, ortho and clinopyroxene, crystallite glass, nickel iron alloy and troillite (kamacite and/or taenite/tetrataenite) and inter chondrules glassy material occurs in association with troillite, nickel and other alloy iron-based compounds. The lithochemical data show excellent correlation with the C chondrite, noting only small differences above or between them. The study made it possible to classify the artifact as type L3 and L4 ordinary chondrite.

A modernidade poética em Cesário Verde e Gomes Leal

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Propagação de Hancornia speciosa Gomes – Apocynaceae, por alporquia e micropropagação

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Variação populacional de Proceratophrys moratoi (Jim e Caramashi, 1980) (Amphibia: Anura) no Estado de São Paulo

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Medidas e modelos de estimativa da radiação direta na incidência: Eduardo Nardini Gomes. -

Pós-graduação em Agronomia (Irrigação e Drenagem) - FCA

Repercussões do trágico e do social no teatro de Dias Gomes: leitura comparativa entre Antígona de Sófocles; O Pagador de Promessas, O Santo Inquérito e As Primícias de Dias Gomes

Pós-graduação em Letras - FCLAS

Luzes e sombras: Paulo Emilio Salles Gomes e a cultura cinematográfica (1954-59)

Pós-graduação em História - FCLAS

Conservação pós-colheita de mangaba (Hancornia Speciosa Gomes)

Pós-graduação em Agronomia - FEIS