Ambient Values
Mostrando 13-24 de 156 artigos, teses e dissertações.
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13. Characterization of Nd3+-doped Tellurite Glasses with Low OH Content
This work presents the results of the investigation of structural and thermal properties of Nd3+-doped tellurite glasses with low OH content. The samples were characterized by XRD, FTIR, DTA, UV/VIS/NIR and Archimedes’ method. Tellurite glasses of composition (100 – x)(0.8TeO2 + 0.2WO3) + xNd2O3 (x = 0, 0.05, 0.5, 1, 2, and 4 mol%) were prepared in both
Mat. Res.. Publicado em: 23/10/2015
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14. Avaliação da lixiviação do cádmio e níquel provenientes da degradação de baterias níquel-cádmio em uma coluna de solo
Spent nickel-cadmium (Ni-Cd) batteries and salts of nickel and cadmium were placed in two different columns of soil for a period of two years. A leaching solution was passed through them at ambient temperature in this period. The behavior of metals in each column was then evaluated. Under the conditions of the experiment, cadmium and nickel demonstrated the
Quím. Nova. Publicado em: 2014-06
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15. O uso da lógica fuzzy no controle das temperaturas de um conjunto gaseificador/combustor de biomassas / Using fuzzy logic to control the temperatures of a set gasifier/combustor of biomasses
This study consisted in designing and building a concurrent biomass gasifier that, when attached to a gas combustor, produced a mix of hot air and ambient air to be used for drying grains, among other things. It aimed at controlling the combustion zone gasifier temperature and exhaust hot air temperature. The theoretical mathematical framework chosen to deve
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 03/04/2012
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16. Thermodynamic analysis of gas turbine cycle using inlet air cooling methods
This work focuses on a comparative analysis among three compressor inlet air cooling techniques using a thermodynamic approach to simulate the gas turbine cycle. Firstly, a Base Case is tested to determine the gas turbine performance without any cooling method. The effect of site altitude on the power output gas turbine even without any cooling technique is
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/02/2012
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17. Avaliação comportamental e fisiológica de suínos em baias individuais e gaiolas metabólicas. / Behavioral and physiological evaluation of swine in individual stalls and metabolic cages.
Two articles were made to assessed the behavioral and physiological parameters of pigs housed in individual stalls and metabolism cages. The first article was to evaluate the effects of period (before and during), type of housing (individual stall and metabolic cage) and feeding treatment (T1, T2, T3 and T4) in salivary cortisol concentrations. Was collected
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2012
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18. Efeito da granulometria e da embalagem na sorção de água pelo café torrado e moído / Effect of granulometry and packaging on water sorption by roasted and ground coffee
The objective of this study was to evaluate the effect of granulometry and types of packaging on the water sorption by roasted and ground coffee. Arabica coffee grains were utilized with an initial water content of 0.1234 kgw kgdm -1, roasted until the medium roast point, with a weight loss of 17%, in wich four granulometric levels were established: whole gr
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 19/07/2011
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19. Desenvolvimento de processos de eletrodos de porta (TaN e TiN) para dispositivos MOS / Process development of gate electrodes (TiN and TaN) for MOS devices
Tantalum nitride (TaN) and titanium nitride (TiN) films have been obtained by DC sputtering, using different nitrogen flow (10 - 80 sccm) and power (500 - 1500 W), in a nitrogen (N2)/argon (Ar) ambient on Si (100) substrates. The N2/Ar ratio in gas mixture and power effects on structural and electrical properties of TaN and TiN films were investigated by sca
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 01/07/2011
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20. Rheological studies of aqueous stabilised nano-zirconia particle suspensions
In the present investigation aqueous suspensions of nano- and colloidal range particles are stabilised by changing the ambient pH. Rheology is used to establish the stability of the suspensions and it is found that the rheology of the suspensions is strongly dependent on the pH values. The viscosity is highest close to the iso-electric point of the powders.
Materials Research. Publicado em: 13/12/2011
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21. Surface temperature distribution in broiler houses
In the Brazilian meat production scenario broiler production is the most dynamic segment. Despite of the knowledge generated in the poultry production chain, there are still important gaps on Brazilian rearing conditions as housing is different from other countries. This research study aimed at analyzing the variation in bird skin surface as function of heat
Revista Brasileira de Ciência Avícola. Publicado em: 2011-09
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22. Produção de bioetanol a partir de resíduos agroindustriais
Concerns about global warming and the depletion of petroleum cause the search for alternative fuels from renewable sources. The current study aims at obtaining bioethanol from fermentable sugars extracted from hydrolyzed residues in situ by solid-state fermentation (SSF). The first stage was the SSF for the hydrolysis of the culture medium which is composed
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/12/2010
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23. O controle estatal das políticas públicas de créditos e incentivos fiscais para as empresas socioambientalmente responsáveis
The Federal Constitution of Brazil, in its arts. 170 and 174, prescribe the legal-economic regimen that is bedding for the state intervention in the economic domain. The structure norms that compose such regimen also indicate between the intervention forms the regulation in normative direction and the incentives. These possibilities, however, always must be
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 05/11/2010
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24. Análise do conforto ambiental em salas de aula da Universidade Federal de Goiás / Analysis of environmental comfort in classrooms at the Federal University of Goias
Provide users good physical conditions in educational institutions is essential for the proper development of teaching and learning. This work deals with the verification in-loco of the environmental comfort of classrooms in two buildings with different architectural and construction techniques, that are part of the structure of the Federal University of Goi
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/09/2010