Boltzmann S Equation
Mostrando 1-12 de 30 artigos, teses e dissertações.
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1. FORMULACÃO UNIFICADA PARA MODELOS CINETICOS DERIVADOS DA EQUAÇÃO DE BOLTZMANN COM CONDIÇÕES DE CONTORNO GENERALIZADAS / UNIFIED FORMULATION FOR KINETIC MODELS DERIVATIVES OF BOLTZMANN EQUATION WITH GENERALIZED BOUNDARY CONDITIONS
In this paper, we present numerical results obtained from the FORTRAN language for physical quantities of interest such as velocity prole, prole, heat ow rate, particle ow rate,heat ux and pressure tensor component. The gas ow occur in the direction parallel to thesurface the gas is conned because of a constant gradient of pressure and a constant gradient of
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/02/2012
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2. Evaluation of radiances generated by solving the radiative-transfer equation with different approaches
Radiative transfer is the main phenomenon in the basis of several relevant problems of scientific and technological interest. Examples of application of the mathematical and computational modeling of such phenomenon can be found in astronomy, environmental sciences, engineering and medicine among many different areas. The integro-differential equation known
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2012-06
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3. Cosmic microwave background polarization / Polarização da radiação cósmica de fundo
Applying concepts of quantum mechanics and kinetic theory we show a re-derivation of Boltzmann equation for the Cosmic Microwave Background (CMB) polarization. We show the equivalence between our derivation and those already known ( [1], [2], [3] ) and also that these derivations correspond to take into account the effect, on the photon polarization, of two
Publicado em: 2009
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4. Heavy ion interactions from Coulomb barrier to few GeV/n: Boltzmann Master Equation theory and FLUKA code performances
Results which have been recently obtained with the Boltzmann master equation and the FLUKA code in the analysis of heavy ion interactions at relative energies ranging from Coulomb barrier up to a few GeV/n are discussed.
Brazilian Journal of Physics. Publicado em: 2004-09
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5. Solution of non-linear Poisson-Boltzmann equation for erythrocyte membrane
The space-dependent electric potential equations were determined by solution of non-linear Poisson-Boltzmann equation, which decribes an erythrocyte membrane model which takes into account the charges of molecules associated with lipidic bilayer (glycocalyx molecules, outer side, and spectrin, inner side). It was assumed that on both sides of the membrane th
Brazilian Journal of Physics. Publicado em: 2000-06
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6. Modeling the electrophoresis of lysozyme. II. Inclusion of ion relaxation.
In this work, boundary element methods are used to model the electrophoretic mobility of lysozyme over the pH range 2-6. The model treats the protein as a rigid body of arbitrary shape and charge distribution derived from the crystal structure. Extending earlier studies, the present work treats the equilibrium electrostatic potential at the level of the full
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7. Asymmetrical charge movement in slow- and fast-twitch mammalian muscle fibres in normal and paraplegic rats.
Asymmetrical charge movements (Q) were recorded from the voltage-clamped ends of muscle fibres in extensor digitorum longus (e.d.l.) and soleus muscles from rats. Tetracaine (2 mM) was added to solutions to prevent contraction. In both muscles the relationship between Q and membrane potential (V) was S-shaped and could be described by the Boltzmann-type equa
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8. Development of calcium current subtypes in isolated rat hippocampal pyramidal cells.
1. Patch-clamp techniques were used to record from acutely dissociated rat hippocampal pyramidal cells of different postnatal ages to study the development, kinetics of activation and inactivation, and pharmacology of various components of whole-cell calcium current. 2. In both adult and immature pyramidal cells, the threshold of activation for Ca2+ current
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9. Slow and fast transient potassium currents in cultured rat hippocampal cells.
1. Potassium currents have been recorded from rat hippocampal neurons in dissociated cultures prepared at E17-E19. Currents were studied with the whole-cell version of the patch clamp method. The kinetics and pharmacological properties of two transient outward currents have been characterized. 2. Most of the recordings have been done in cells which had been
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10. Direct molecular level measurements of the electrostatic properties of a protein surface
In this work, we used direct measurements with the surface force apparatus to determine the pH-dependent electrostatic charge density of a single binding face of streptavidin. Mean field calculations have been used with considerable success to model electrostatic potential fields near protein surfaces, but these models and their inherent assumptions have not
The National Academy of Sciences.
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11. Microenvironment analysis and identification of magnesium binding sites in RNA
Interactions with magnesium (Mg2+) ions are essential for RNA folding and function. The locations and function of bound Mg2+ ions are difficult to characterize both experimentally and computationally. In particular, the P456 domain of the Tetrahymena thermophila group I intron, and a 58 nt 23s rRNA from Escherichia coli have been important systems for studyi
Oxford University Press.
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12. Dopamine D2 receptor stimulation differentially affects voltage-activated calcium channels in rat pituitary melanotropic cells.
1. Whole-cell voltage clamp recordings were made from 141 rat pituitary melanotropic cells in short-term, serum-free, primary culture. The effects of the dopamine D2 receptor agonist, LY 171555, on sodium, potassium and barium currents were investigated. 2. Application of 1 microM-LY 171555 did not affect the inward sodium and outward potassium currents. 3.