• The structural role of Ti in a thermally-treated Li2O − B2O3–Al2O3 glass system 

  Silva, V. A.; Nascimento, M. L. F.; Morais, P. C.; Dantas, Noelio Oliveira (Brasil, 2014)

  A 50Li2O·45B2O3·5Al2O3 (LBA, in mol%) glass matrix doped with increasing TiO2 content was synthesized and its physical properties were investigated by differential thermal analysis (DTA), X-ray diffraction (XRD), and Raman ...
• Solubility and solubility modeling of polycyclic aromatic hydrocarbons in subcritical water 

  Teoh, Wen Hui; Mammucari, Raffaella; Melo, Silvio Alexandre Beisl Vieira de; Foster, Neil R. (2013)

  A static analytical equilibrium method was used to measure the binary and ternary solubilities of anthracene and p-terphenyl in subcritical water between 393 and 473 K and at 50 and 150 bar. Temperature was found to have ...
• Evaluation of the chemical stability of a landfilled primary lead smelting slag 

  Lima, Luiz Rogério Pinho de Andrade; Bernardez, L. A. (2013)

  A primary lead smelter operating in Santo Amaro, Bahia, Brazil, from 1960 to 1993 generated a large amount of slag that was landfilled close to the former smelter and used in roads and houses as a construction material. ...
• Cassava sarch-based films plasticized with sucrose and inverted sugar and reinforced with cellulose nanocrystals 

  Silva, Jania B. A. da; Pereira, Fabiano V.; Druzian, Janice Izabel (2012)

  Bionanocomposites films of cassava starch plasticized with sucrose and inverted sugar and reinforced by cellulose nanocrystals (CNCs) were prepared by solution casting method incorporating 0.1 to 5 wt% of eucalyptus CNCs. ...
• Use of green coconut shells as an alternative substrate for the production of xanthan gum on different scales of fermentation 

  Nery, Tatiana Barreto Rocha; Cruz, Antonio José Gonçalves da; Druzian, Janice Izabel (Brasil, 2013)

  Xanthan, a biopolymer with extensive industrial applications, is commercially produced by fermenting glucose or sucrose using the bacteria Xanthomonas. Green coconut shells, rich in nutrients, could be an alternative ...
• Control of crystallization kinetics and study of the thermal, structural and morphological properties of an Li2O–B2O3–Al2O3 vitreous system 

  Dantas, Noelio Oliveira; Silva, Valdeir A.; D. Neto, Omar. O.; Nascimento, Marcio Luis Ferreira (2012)

  A glass matrix with nominal composition 50Li2O·45B2O3·5Al2O3 (mol%) was synthesized, and its physical properties were investigated by differential thermal analysis (DTA), X-ray diffraction (XRD), and atomic force microscopy ...
• A new approach for the thermodynamic modeling of the solubility of amino acids and β-lactam compounds as a function of pH 

  Franco, Luís Fernando Mercier; Silva, Silvana Mattedi e; Pessôa Filho, Pedro de Alcântara (2013)

  A new model to describe the solubility of amino acids and β-lactam compounds as a function of pH is proposed. The description of the solid–liquid equilibrium entails simultaneous calculation of phase and chemical equilibria. ...
• Bioconversion from crude glycerin by xanthomonas campestris 2103: xanthan production and characterization 

  Brandão, Líllian Vasconcellos; Assis, Denilson de Jesus; López, J. A.; Espiridião, M. C. A.; Echevarria, E. M.; Druzian, Janice Izabel (Brasil, 2013)

  The production and rheological properties of xanthan gum from crude glycerin fermentation, a primary by-product of the biodiesel industry with environmental and health risks, were evaluated. Batch fermentations (28 °C/250 ...
• Caracterização reológica da goma xantana: influência de íons metálicos univalente e trivalente e temperatura em experimentos dinâmicos 

  Luporini, Samuel; Bretas, Rosario Elida Suman (Brasil, 2011)

  As propriedades dinâmicas das soluções aquosas de goma xantana com e sem adição de NaCl ou Al2(SO4)3.18H2O foram medidas em um reômetro de deformação controlada aplicando ciclos de aquecimento e resfriamento. O tempo de ...
• Measuring and modelling experimental densities and ultrasonic velocities of aromatic and halogenated environmental pollutants 

  Duro, Miguel Angel Iglesias; Silva, Silvana Mattedi e; Gonzalez-Olmos, R.; Goenaga, J. M.; Resa, J. M. (2007)

  The potential environmental impact of aromatic and halogenated chemicals from the petrochemical and steel industry is of growning concern. The present paper deals with the modelling and experimental determination of density ...
• Produção de goma xantana por cepas nativas de Xanthomonas campestris a partir de casca de cacau ou soro de leite 

  Diniz, Denis de M.; Druzian, Janice Izabel; Audibert, Samara (2012)

  Foi estudada a otimização do processo de produção de goma xantana a partir de casca de cacau ou soro de leite como fonte de carbono, e determinou-se o rendimento da goma obtida pela bioconversão de casca de cacau e soro ...
• Terrestrial ecotoxicity of short aliphatic protic ionic liquids 

  Duro, Miguel Angel Iglesias; Martí, Esther; Sierra, Jordi; Peric, Brezana; Cruañas, Robert; Garau, Maria Antonia (2011)

  A study of the ecotoxicity of different short aliphatic protic ionic liquids (PILs) on terrestrial organisms was conducted. Tests performed within the present study include those assessing the effects of PILs on soil ...
• Influence of the preheating layer characteristics in a two-layer porous burner 

  Hayashi, T. C.; Malico, I.; Pereira, J. C. F. (2007)

  The influence of the perforated plate characteristics that precedes the flame support layer in a newly designed bilayered porous combustor was numerically assessed. It is shown that a perforated plate with 1 mm diameter ...
• Column flotation of high grade fluorite without wash water addition 

  Aliaga, Washington; Sampaio, C. H.; Brum, Irineu Antônio Schadach de; Ferreira, K. R. S.; Batistella, Marcos Antonio (2007)

  The present paper presents the results of fluorite flotation carried out on a column cell without wash water addition. Concentrate flow was obtained by making tailing flows smaller than feed flows. Hence, part of the feed ...
• A cognitive approach to develop dynamic models: application to polymerization systems 

  Lima, Nádson Murilo Nascimento; Maciel Filho, Rubens; Embiruçu, Marcelo; Maciel, Maria Regina Wolf (2007)

  An alternative procedure based on cognitive approach is applied to develop dynamic models. The solution copolymerization of methyl methacrylate and vinyl acetate in a continuous stirred tank reactor is analyzed to illustrate ...
• Continuous soluble Ziegler-Natta ethylene polymerizations in reactor trains, 2 -estimation of kinetic parameters from industrial data 

  Embiruçu, Marcelo; Prata, Diego Martinez; Lima, Enrique Luis; Pinto, José Carlos (2008)

  We show that it is possible to estimate kinetic parameters for complex mechanistic polymerization models from available industrial data. A methodology is developed for efficient handling and reconciliation of industrial ...
• Continuous soluble Ziegler-Natta ethylene polymerizations in reactor trains, 3 - Influence of operating conditions upon process performance 

  Embiruçu, Marcelo; Pontes, Karen Valverde; Lima, Enrique Luis; Pinto, José Carlos (2008)

  The behavior of continuous solution ethylene/but-1-ene polymerizations through Ziegler-Natta catalysts is analyzed, based on a previously developed mathematical model. In order to do that, dynamic simulations are carried ...
• An approach for complete molecular weight distribution calculation: application in ethylene coordination polymerization 

  Pontes, Karen Valverde; Maciel, Rubens; Embiruçu, Marcelo (2008)

  The objective of this article is to present an approach to ascertain the molecular weight distribution (MWD) of polymeric systems and its application to an industrial polyethylene reactor. Ascertaining the complete MWD can ...
• Vapor−liquid equilibria data for binary systems of ethylbenzene + xylene isomers at 100.65 kPa 

  Rodrigues, Willias da Luz; Silva, Silvana Mattedi e; Abreu Neto, João Capistrano de (2005)

  Vapor−liquid equilibria data for binary mixture of ethylbenzene + xylene isomers were obtained isobarically with a modified Fischer cell at 100.65 kPa. Temperatures were measured with a resolution of ±0.001 K, and vapor- ...
• Catalytic oxidation of phenol in aqueous media over CuZSM-12 zeolite 

  Vieira, Rinaldo Antonio de Melo; Pires, Carlos A. M.; Suñé, Leticia S. V. S.; Silva, Antonio O. S.; Souza, Marcelo José Barros de; Araujo, Antonio S. (2006)

  The catalytic oxidation of phenol over CuZSM-12 (SAR = 200) has been studied using a semi-batch slurry reactor at temperatures of 110, 120 and 130oC, and acidic neutral and basic pH. At 130oC, the phenol undergoes total ...

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