Análise experimental e numérica de convecção forçada em arranjo de obstáculos dentro de canal

Pós-graduação em Engenharia Mecânica - FEIS

Preparação de aluminas porosas hierarquicamente estruturadas

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Análise numérica e experimental na determinação da potência térmica dissipada em componentes eletrônicos

Pós-graduação em Engenharia Mecânica - FEIS

Utilização de Saccharomyces cerevisiae imobilizada em bagaço de cana de açúcar para a biossorção e biodegradação do corante acid black 48

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Influência da relação entre diâmetros no comportamento hidrodinâmico de reatores aeróbios de leito fluidizado com circulação em tubos concêntricos

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Avaliação da dinâmica temporal da evaporação no reservatório de Itumbiara, GO, utilizando dados obtidos por sensoriamento remoto

The object of this work was to study the dynamics of evaporation in the Itumbiara reservoir, located in Central Brazil, using MODIS-derived water surface temperature (product MOD11A1) and meteorological data acquired over the water surface. The evaporation rates were derived from latent heat flux, estimated through a mass transfer model. The estimates were carried out for the period between 1/1/2010 and 31/12/2010. The results showed that evaporation rate tends to increase from January to September and then decrease from September to December. The evaporation rate reached values near 20 mm day-1 in Itumbiara reservoir during the dry season in 2010. The mean evaporation rate for the wet season was 3.66 mm day-1 and 8.25 mm day-1 for the dry season. The total water volume evaporated from Itumbiara reservoir during 2010 was estimated at about 1.7 billion m³ (2,300 mm) which represents 10% of total reservoir volume. The results suggest that advection is the main transport mechanism which drives the evaporation in Itumbiara. The convective processes contribute secondarily to evaporation in Itumbiara reservoir.

Sugars Electrooxidation at Glassy Carbon Electrode Decorate with Multi-Walled Carbon Nanotubes with Nickel Oxy-Hydroxide

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

Structural properties of beds packed with agro-industrial solid by-products applicable for solid-state fermentation: Experimental data and effects on process performance

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Influence of nanoparticle size and gap size on nucleate boiling using HFE7100

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Equivalence between the application of entransy and entropy generation

Recently, a group of researchers proposed the concept of entransy by analogy with the electrical energy stored in a capacitor, the entransy being a measure of the ability of a body or a system to transfer heat. In comparative terms, the entransy dissipation rate is related with the loss of heat transfer ability just like the exergy destruction rate is proportional to the loss of work ability, being these losses caused by the irreversibilities related to the thermodynamic processes. Some authors have questioned the need for the concept of entransy, claiming that this concept is only an extension of a well established theory of heat transfer. The objective of this work is show the equivalence between the application of the concepts of entransy and entropy generation rate, which can be verified using various application examples. The application examples used here are the thermodynamic modeling of three physical models of solar energy collectors and a physical model of a sensible heat storage system. Analytical results are shown and compared. The results showed that the application of the concept of entransy provided identical expressions obtained by the concept of entropy generation, indicating a duplication of concepts. (C) 2014 Elsevier Ltd. All rights reserved.

Análise física da estrutura do tecido ósseo bovino

There are diseases in vertebrates associated with the structure of bone tissue that directly affect the locomotor system of the animal. Being a endoskeleton, the diagnosis of these diseases becomes difficult in vivo. The characterization of the physical structure of the bone tissue of healthy animals becomes a major tool in the diagnosis comparison of live animals. Thus, the objective of this work is to determine the average value of the key physical properties of the bone structure used in the clinical diagnosis, such as: bone density, porosity, and mass attenuation coefficient of 59.6 keV photons of bone tissue and bovine and equine check variations in these values. The samples were provided by the pathology department of the Faculty of Veterinary Medicine and Zootechny of Botucatu-SP, which are of one male equine and one female bovine animals, using the radio and metacarpus, together with these materials were supplied the historic them. They were withdrawn ten samples in cuts of 10cm over the bone . These samples were submitted to the wet method of immersion in water for the density, by the method of attenuation of gamma radiation of radioisotope 241Am, it is estimated the mass attenuation coefficient, and then were dried in the oven for determining the content moisture. In determining the porosity of the samples was tight ground, in order to obtain the density of particles. The results for the mass attenuation coefficient of gamma radiation to the levels of saturated humidity, environment humidity, dry humidity respectively 0289 ± 0039; 0286 ± 0040 and 0297 ± 0042. And the density of particles was 2.2691 g/cm3

Physical-chemical characterization and wet milling yield of four maize hybrids

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

Development and application of a screen-printed electrode modified with MWCNT for the electrocatalytic detection of thiram

Interest in the electronic properties of carbon nanotubes has increased in recent years. These materials can be used in the development of electrochemical sensors for the measurement and monitoring of analytes of environmental interest, such as pharmaceuticals, dyes, and pesticides. This work describes the use of homemade screen-printed electrodes modified with multi-walled carbon nanotubes (MWCNT) for the electrochemical detection of the fungicide thiram. The electrochemical characteristics of the proposed system were evaluated using cyclic voltammetry, with investigation of the electrochemical behavior of the sensor in the presence of the analyte, and estimation of electrochemical parameters including the diffusion coefficient, electron transfer coefficient (α), and number of electrons transferred in the catalytic electro-oxidation. The sensor response was optimized using amperometry. The best sensor performance was obtained in 0.1 mol L-1 phosphate buffer solution at pH 8.0, where a detection limit of 7.9 x 10-6 mol L-1 was achieved. Finally, in order to improve the sensitivity of the sensor, square wave voltammetry (SWV) was used for thiram quantification, instead of amperometry. Using SWV, a response range for thiram from 9.9 x 10-6 to 9.1 x 10-5 mol L-1 was obtained, with a sensitivity of 30948 µA mol L-1, and limits of detection and quantification of 1.6 x 10-6 and 5.4 x 10-6 mol L-1, respectively. The applicability of this efficient new alternative methodology for thiram detection was demonstrated using analyses of enriched soil samples.

Cinética de crescimento do fungo termófilo Myceliophthora thermophila M. 7.7 em cultivo no estado sólido

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Extração e caracterização de amido de quinoa, cañihua e Mirabilis jalapa

Pós-graduação em Engenharia e Ciência de Alimentos - IBILCE