Calorimetric Measurement
Mostrando 1-8 de 8 artigos, teses e dissertações.
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1. Operator Bias in the Estimation of Arc Efficiency in Gas Tungsten Arc Welding
In this paper the operator bias in the measurement process of arc efficiency in stationary direct current electrode negative gas tungsten arc welding is discussed. An experimental study involving 15 operators (enough to reach statistical significance) has been carried out with the purpose to estimate the arc efficiency from a specific procedure for calorimet
Soldag. insp.. Publicado em: 2015-03
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2. Balanço calorimétrico de um condensador evaporativo / Calorimetric balance of an evaporative condenser
Este trabalho apresenta a determinação do balanço calorimétrico de uma bancada experimental de um condensador evaporativo. Tem por finalidade determinar uma metodologia para a identificação das taxas de transferência de calor que são entregues e rejeitadas pelo condensador, as irreversibilidades do sistema e suas incertezas. Além disso, através da
Publicado em: 2010
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3. 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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4. Acetilacetona, diacetamida e N-(2-piridil)-acetamida imobilizadas na superficie de silica gel - preparação, caracterização, adsorção, termoquimica e espectroscopia de complexos suportados
The ligands acetyIacetone(ac), diacetamide(da) and N-(2-pyridyl)acetamide(pa) were immobilized on siIica gel surface, giving the products Si-ac, Si-da and Si-pa, respectively. These materiaIs were characterized through elemental analyses, infrared spectroscopy, surface area measurement, solid state carbon-13 NMR, thermogravimetry and differencial scanning ca
Publicado em: 1993
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5. Mechanistic Evaluation of the Effect of Sintering on Compritol® 888 ATO Matrices
The present research studied the effect of sintering technique in the development of a controlled release formulation for ketorolac tromethamine. The method consisted of mixing drug and wax powder (Compritol® 888 ATO) along with lactose as diluent and talc as lubricant followed by direct compression at room temperature. The compressed fluffy matrices were k
Springer US.
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6. Polymorphism, mesomorphism, and metastability of monoelaidin in excess water.
The polymorphic and metastable phase behavior of monoelaidin dry and in excess water was studied by using high-sensitivity differential scanning calorimetry and time-resolved x-ray diffraction in the temperature range of 4 degrees C to 60 degrees C. To overcome problems associated with a pronounced thermal history-dependent phase behavior, simultaneous calor
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7. Heat production of quiescent ventricular trabeculae isolated from guinea-pig heart.
1. A new calorimetric technique has been developed which allows continuous measurement of the rate of energy expenditure in superfused preparations of cardiac muscle. Thin trabeculae of guinea-pig ventricular muscle were mounted in a Perspex tube of 0.8 mm inner diameter and the temperature difference of the perfusate upstream and downstream of the preparati
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8. The contribution of DNA single-stranded order to the thermodynamics of duplex formation.
We report a direct determination of the thermodynamic contribution that DNA single-stranded order makes to DNA duplex formation. By using differential scanning calorimetry (DSC) and temperature-dependent UV absorbance spectroscopy, we have characterized thermodynamically the thermally induced disruption of the 13-mer duplex [d(CGCATGAGTACGC)].[d(GCGTACTCATGC