Alternative uses for vinasse, an alcohol industry residue. A review

Recent studies on the recycling of vinasse, its potential use in agriculture and possible environmental problems resulting from the use and disposal of this residue are reviewed.

Rheological properties of tin oxide suspensions

The rheological properties of tin oxide slurries were studied experimentally and theoretically. The deflocculants used were ammonium polyacrilate (PAA) and the copolymer poly(vinyl butyral-co-vinyl alcohol-co-vinyl acetate) (PVB-PVA-PVAc), in water and ethanol, respectively. The amount of deflocculant was optimized for different solid contents by means of viscosity measurements. In spite of the high stability of PVB-dispersed slurries, a high solid concentration was not obtained. On the other hand, a slurry with a 56.4 vol.% of solids was attained when PAA was used. A theoretical study of the adsorption of PAA in its dissociated (basic solution) and non-dissociated (acidic solution) forms on SnO 2 (110) is presented. This analysis was made by means of the PM3 method using a large cluster Sn 15O 28 for the surface model. The calculated adsorption energy is larger for the ionized PAA than for the non-ionized form, indicating that alkaline slurries favor PAA adsorption on the SnO 2 surface. © 2002 Elsevier Science Ltd. All rights reserved.

Euclidean 4d exact solitons in a Skyrme type model

We introduce a Skyrme type, four-dimensional Euclidean field theory made of a triplet of scalar fields n→, taking values on the sphere S2, and an additional real scalar field φ, which is dynamical only on a three-dimensional surface embedded in R4. Using a special ansatz we reduce the 4d non-linear equations of motion into linear ordinary differential equations, which lead to the construction of an infinite number of exact soliton solutions with vanishing Euclidean action. The theory possesses a mass scale which fixes the size of the solitons in way which differs from Derrick's scaling arguments. The model may be relevant to the study of the low energy limit of pure SU(2) Yang-Mills theory. © 2004 Elsevier B.V. All rights reserved.

Rod length influence in torque measurement of SPT-T test

Since Ranzini suggested supplementing the SPT test with measurement of the torque required to turn the split spoon sampler after driving, many Brazilian engineers have been using this in the design of pile foundations. This paper presents a study of the rod length influence in the torque measurement. A theoretical study of material resistance considering torsion and bending in a thin wall tubular steel shaft was performed. It makes possible to conclude that the shearing tension caused by the proper weight represents less than 1% of the shearing tension caused by the turning moment. In addition, an experimental study was done with electric torquemeters fixed in a horizontal rod system. The tests were being carried out to analyze rods of one meter to twenty meters in length and the measurements were collected at the ends of each rod length verifying the efficiency data. As a result, it is possible to verify that the torque difference through rod length is lower than minimum scales of mechanical torquemeters that are used on practical engineering. Also a fact to be considered is a big torque loss for values under 20 N.m of applied torque. This way, the SPT-T is not adequate to low consistency soil. Copyright ASCE 2007.

Síntese e modelagem molecular do novo derivado indolinônico como candidato a antiinflamatório COX-2 seletivo

Anti-inflammatory drugs are known to be the most widely-marketed drugs in the world, despite their serious side effects, mainly on the gastrointestinal tract. Thus, there are constant efforts to discover new prototypes with improved therapeutic activity and safety for the patient. Since the advent of the computational chemistry, the theoretical study of the physiological behavior of a new compound and hence an understanding of its supposed mechanism of action have been made a lot more accessible. Thus, molecule-receptor mathematical modeling was applied to compound I (1-(2,6-dichlorophenyl)indolin-2-one), to predict theoretically its ability to inhibit, selectively, the COX-2 isoform of prostaglandin endoperoxide synthase (PGHS-2), and the best positions to introduce chemical groups and to make molecular modifications.

Os novos espaços de acumulção do Grupo Votorantim

This article aims to getting at the recent changes in Brazilian industrial capitalism, especially the expansion of companies and business groups abroad. The analyzed theme is the Votorantim Group, one of the most important groups in the country and Latin America. The Group acts in several branches of the economy and it has recently invested in the acquisition of foreign companies in different business and countries. In this article, the theories of internationalization of companies and business groups and the path of the Votorantim Group are focused - from its origin to productive internationalization. The secondary data were compiled from annual reports of the group, specialized magazines and newspapers.

Proposta de modelo de dicionário bilíngue português-francês/francês-português de termos de estatutos sociais: uma colaboração para tradudores juramentados

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

Desenvolvimento do protótipo de um atlas escolar interativo

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

A construção da notícia no site Mercosul News: o caso EPP

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Leituras de mundo, saberes e modos de existência de educandos e educadores: contribuição para a invenção de modos de aprender e ler

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

A formação da escuta: subjetividade e política

Pós-graduação em Educação - IBRC

Modelagem inicial para o ensino de geometria eucliadiana plana segundo a teoria da atividade de estudo

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Fundamentos teóricos da atividade de estudo como modelo didático para o ensino das disciplinas científicas

Pós-graduação em Educação para a Ciência - FC