Calorimetric Energy
Mostrando 1-12 de 38 artigos, teses e dissertações.
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1. Potencialidad de varias especies para la obtención de biomasa con fines energéticos en el secano mediterráneo de Chile
Abstract In Chile, there are about 1.8 million hectares of dryland soils with severe site restrictions for agronomic and forest species growth. However, these soils can be used to establish energy crops, using forest species specially adapted to this condition. The purpose of this paper is to estimate the potential land availability in the drylands of centra
Ciênc. Florest.. Publicado em: 30/09/2019
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2. INFLUÊNCIA DO ENVELHECIMENTO ACELERADO EM FLARES MAGNÉSIO/PTFE/FPM
Magnesium/PTFE/FPM decoy flares, also named conventional flares, were designed in order to protect combat aircraft from the threat caused by infrared-guided missiles. Adverse storage or transport conditions may cause reactions that deteriorates chemical properties of the conventional flares, causing the aging and compromising its performance. The aim of this
Quím. Nova. Publicado em: 2017-09
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3. Determination of acoustic fields in acidic suspensions of peanut shell during pretreatment with high-intensity ultrasound
Abstract The benefits of high-intensity ultrasound in diverse processes have stimulated many studies based on biomass pretreatment. In order to improve processes involving ultrasound, a calorimetric method has been widely used to measure the real power absorbed by the material as well as the cavitation effects. Peanut shells, a byproduct of peanut processing
Braz. J. Chem. Eng.. Publicado em: 2017-04
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4. Fully Automatic Spot Welding System for Application in Automotive Industry
Abstract A Virtual Machine has led to a fully automatic spot welding system. All necessary parameters are created by measuring systems and algorithms running in the Virtual Machine. A hybrid operating circuit allows the Virtual Machine to read the exact process voltage between the tips of the electrodes every 50 µs. Actual welding voltage and current allow
Soldag. insp.. Publicado em: 2015-12
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5. Caracterização físico-química do óleo essencial da Siparuna guianensis Aublet
Thermal and spectroscopic analyses of essential oil extracted from Siparuna guianensis Aublet, an aromatic plant belonging to medicinal ethnobotany family Siparunaceae, were carried out. The plant is known throughout the North and Northeast of Brazil by the name negramina and has wide application as a natural insect repellent. Thermogravimetric analyses were
Quím. Nova. Publicado em: 2014-06
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6. Caracterização de biomassas brasileiras para fins de aproveitamento energético / Characterization of brazilian biomasses for energy recovery
New energetic alternatives have been the subject of discussion about conservation of natural resources. Such discourses are based mainly on reducing emissions of greenhouse gases and other pollutants, caused mostly by the use of fossil fuels, major source of energy today. In view of the applicability of biomass as energy input, this paper presents an experim
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/02/2012
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7. Solution thermodynamics of methocarbamol in some ethanol + water mixtures
Apparent thermodynamic functions, Gibbs energy, enthalpy and entropy of solution and mixing, for methocarbamol in ethanol + water mixtures, were evaluated from solubility data determined at temperatures from 293.15 K to 313.15 K and from calorimetric values of drug fusion. The drug solubility was greatest in the mixtures with 0.70 or 0.80 mass fraction of et
Quím. Nova. Publicado em: 2012
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8. Química supramolecular de fármacos antirretrovirais inibidores nucleosídeos de transcriptase reversa: novas formas cristalinas e alteração de propriedades de estado sólido / Supramolecular chemistry of antiretroviral nucleoside reverse transcriptase inhibitor drugs
Solid state properties are directly related to drug performance. Among all physical and chemical properties dependent on the crystal phase of a drug, stability and solubility are the main ones that alter its bioavailability. In this way, molecular crystal engineering is a strategy to improve solid state properties of drugs related to their efficacies. In thi
Publicado em: 2010
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9. Avaliação de técnicas calorimétricas aplicadas ao monitoramento de processos químicos. / Calorimetric technique evaluation applied for chemical processes monitoring.
The increasing demand for the production of polymers with more tight properties has placed great emphasis on the development of accurate and robust online monitoring techniques of polymerization reactions. Unfortunately, most of the main characteristics are not measurable online from analytical methodologies currently available and, therefore, in practice, t
Publicado em: 2009
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10. The ultra high energy extensive air shower longitudinal profile on the calorimetric energy calculus and primaries chemical composition studies / O perfil longitudinal de chuveiros atmosfericos extensos de altissimas energias no calculo da energia calorimetrica e no estudo da composição quimica dos primarios
Essa tese tinha como objetivo estudar o perfil longitudinal de chuveiros atmosféricos extensos de forma completa. Nós simulamos chuveiros atmosféricos utilizando o programa CORSIKA para diferentes primários e energias acima de 10 17 e V e procuramos relações entre vários parâmetros extraídos do perfil longitudinal, como Xmax, X0, Xmax - X0, FWHM ent
Publicado em: 2008
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11. Center metallic effect on intermolecular interactions of complexes [M(CN)5NO]x- with poly(ethylene oxide) in aqueous two-phase systems / Efeito do centro metálico nas interações intermoleculares dos complexos [M(CN)5NO]x- com o poli(óxido de etileno) em sistemas aquosos bifásicos
In this thesis has been studied the metallic center influences of pentacianonitrosylmetalates, [M(CN)5NO]x-, on the partition coefficient (K), of these complex anions in aqueous two-phase systems (ATPS). The ATPS were obtained by mixing stock aqueous solutions of an inorganic salt (Li2SO4 or Na2SO4) with a stock solution of poly(ethylene oxide) of average mo
Publicado em: 2007
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12. Sintese e Caracterização de Derivados da Celulose Modificada com Anidridos Orgânicos : adsorção e Termodinamica de Interação com Cations Metalicos / Synthesis and characterization of cellulose derivatives with organic anhydrides : adsorption and interation thermodynamic metallic cations
Cellulose is a widely available biopolymer in nature and its draws considerable chemical interest due its various useful applications. The polysaccharide modification is primarily based on their hydroxyl group reactivity, which determines the carbohydrate chemistry and their related structures. The chemical modification of cellulose was carried out in a solv
Publicado em: 2007