OBTENÇÃO DE CATALISADORES HETEROGÊNEOS DE NIÓBIO MODIFICADO PARA CONVERSÃO DE SEBO BOVINO EM BIODIESEL

Catalisadores sólidos foram preparados a partir de soluções supersaturadas, obtidas pelo método dos precursores poliméricos de óxidos de metais alcalinos terrosos, nióbio e níquel. Os materiais foram caracterizados por espectroscopia na região do infravermelho e difração de raios X. Os catalisadores foram testados na reação de transesterificação metílica do sebo bovino a 250°C, com 10% m/m de catalisador, em tempos de reação de 4, 8 e 16 horas. Nessas condições os catalisadores foram eficientes para conversão de sebo bovino em biodiesel, com teores de ésteres entre 70 a 80% e viscosidades entre 5,4 a 5,9 mm2/s.Palavras-chave: Biodiesel. Sebo bovino. Catálise heterogênea.ACQUISITION OF HETEROGENEOUS CATALYTIC NIOBIUM MODIFIED FOR CONVERSION OF BIODIESEL IN BEEF TALLOWAbstract: Solid catalysts were prepared from supersaturated solutions, obtained by the oxides of alkaline earth metals polymeric precursors, nickel and niobium. The materials were characterized by infrared spectroscopy and X-ray diffraction. The catalysts were tested in the methyl transesterification reaction of the tallow at 250 °C with 10% w/w of catalyst, with reaction times of 4, 8 and 16 hours. In those conditions, the catalysts were efficient for conversion of beef tallow into biodiesel, with esters content from 70 to 80% and viscosities from 5.4 to 5.9 mm2/s.Keywords: Biodiesel. Beef tallow. Heterogeneous catalysis.OBTENCIÓN DE CATALIZADORES HETEROGENEOS DE NIÓBIO MODIFICADO PARA LA CONVERSIÓN DE SEBO DE VACUNO EN BIODIESELResumen: Catalizadores sólidos se prepararon a partir de soluciones sobresaturadas, obtenidos atraves del método de los precursores poliméricos de óxidos de metales de tierras alcalinas, níquel y niobio. Los materiales se caracterizaron por espectroscopía infrarroja y difracción de rayos X. Los catalizadores se ensayaron en la reacción de transesterificación metílica del sebo de vacuno a 250 C con 10% m/m de catalizador, los en tiempos de reacción de 4, 8 y 16 horas. En estas circunstancias los catalizadores fueron eficientes para la conversión de sebo de vacuno en biodiesel, con un contenido de éster entre el 70-80% y la viscosidad de 5,4 a 5,9 mm2/s.Palabras clave: Biodiesel. Sebo de vacuno. Catálisis heterogénea

Educomunicação e suas áreas de intervenção: Novos paradigmas para o diálogo intercultural

oai:omp.abpeducom.org.br:publicationFormat/1O material aqui divulgado representa, em essência, a contribuição do VII Encontro Brasileiro de Educomunicação ao V Global MIL Week, da UNESCO, ocorrido na ECA/USP, entre 3 e 5 de novembro de 2016. Estamos diante de um conjunto de 104 papers executivos, com uma média de entre 7 e 10 páginas, cada um. Com este rico e abundante material, chegamos ao sétimo e-book publicado pela ABPEducom, em seus seis primeiros anos de existência. A especificidade desta obra é a de trazer as “Áreas de Intervenção” do campo da Educomunicação, colocando-as a serviço de uma meta essencial ao agir educomunicativo: o diálogo intercultural, trabalhado na linha do tema geral do evento internacional: Media and Information Literacy: New Paradigms for Intercultural Dialogue

Genotypic study documents divergence in the pathogenesis of bloodstream infection related central venous catheters in neonates

OBJECTIVE: To investigate the pathogenesis of bloodstream infection by Staphylococcus epidermidis, using the molecular epidemiology, in high-risk neonates. METHODS: We conducted a prospective study of a cohort of neonates with bloodstream infection using central venous catheters for more than 24 h. "National Healthcare Safety Network" surveillance was conducted. Genotyping was performed by DNA fingerprinting and mecA genes and icaAD were detected by multiplex-PCR. RESULTS: From April 2006 to April 2008, the incidence of bloodstream infection and central venous catheter-associated bloodstream infection was 15.1 and 13.0/1000 catheter days, respectively, with S. epidermidis accounting for 42.9% of episodes. Molecular analysis was used to document the similarity among six isolates of bloodstream infection by S. epidermidis from cases with positive blood and central venous catheter tip cultures. Fifty percent of neonates had bloodstream infection not identified as definite or probable central venous catheter-related bloodstream infection. Only one case was considered as definite central venous catheter-related bloodstream infection and was extraluminally acquired; the remaining were considered probable central venous catheter-related bloodstream infections, with one probable extraluminally and another probable intraluminally acquired bloodstream infection. Additionally, among mecA+ and icaAD+ samples, one clone (A) was predominant (80%). A polyclonal profile was found among sensitive samples that were not carriers of the icaAD gene. CONCLUSIONS: The majority of infections caused by S. epidermidis in neonates had an unknown origin, although 33.3% appeared to have been acquired intraluminally and extraluminally. We observed a polyclonal profile between sensitive samples and a prevalent clone (A) between resistant samples

Núcleos de Ensino da Unesp: artigos 2013: volume 2: metodologias de ensino e a apropriação de conhecimento pelos alunos

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

Núcleos de Ensino da Unesp: artigos 2007

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq

Characterisation of microbial attack on archaeological bone

As part of an EU funded project to investigate the factors influencing bone preservation in the archaeological record, more than 250 bones from 41 archaeological sites in five countries spanning four climatic regions were studied for diagenetic alteration. Sites were selected to cover a range of environmental conditions and archaeological contexts. Microscopic and physical (mercury intrusion porosimetry) analyses of these bones revealed that the majority (68%) had suffered microbial attack. Furthermore, significant differences were found between animal and human bone in both the state of preservation and the type of microbial attack present. These differences in preservation might result from differences in early taphonomy of the bones. © 2003 Elsevier Science Ltd. All rights reserved

Núcleos de Ensino da Unesp: artigos 2013: volume 2: metodologias de ensino e a apropriação de conhecimento pelos alunos

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

NEOTROPICAL ALIEN MAMMALS: a data set of occurrence and abundance of alien mammals in the Neotropics

Biological invasion is one of the main threats to native biodiversity. For a species to become invasive, it must be voluntarily or involuntarily introduced by humans into a nonnative habitat. Mammals were among first taxa to be introduced worldwide for game, meat, and labor, yet the number of species introduced in the Neotropics remains unknown. In this data set, we make available occurrence and abundance data on mammal species that (1) transposed a geographical barrier and (2) were voluntarily or involuntarily introduced by humans into the Neotropics. Our data set is composed of 73,738 historical and current georeferenced records on alien mammal species of which around 96% correspond to occurrence data on 77 species belonging to eight orders and 26 families. Data cover 26 continental countries in the Neotropics, ranging from Mexico and its frontier regions (southern Florida and coastal-central Florida in the southeast United States) to Argentina, Paraguay, Chile, and Uruguay, and the 13 countries of Caribbean islands. Our data set also includes neotropical species (e.g., Callithrix sp., Myocastor coypus, Nasua nasua) considered alien in particular areas of Neotropics. The most numerous species in terms of records are from Bos sp. (n = 37,782), Sus scrofa (n = 6,730), and Canis familiaris (n = 10,084); 17 species were represented by only one record (e.g., Syncerus caffer, Cervus timorensis, Cervus unicolor, Canis latrans). Primates have the highest number of species in the data set (n = 20 species), partly because of uncertainties regarding taxonomic identification of the genera Callithrix, which includes the species Callithrix aurita, Callithrix flaviceps, Callithrix geoffroyi, Callithrix jacchus, Callithrix kuhlii, Callithrix penicillata, and their hybrids. This unique data set will be a valuable source of information on invasion risk assessments, biodiversity redistribution and conservation-related research. There are no copyright restrictions. Please cite this data paper when using the data in publications. We also request that researchers and teachers inform us on how they are using the data