Search results for "libri"

showing 10 items of 1189 documents

Equilibrio delle prestazioni contrattuali e rimedi giurisdizionali: un'analisi storico-comparatistica.

equilibrio contrattuale
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Determinación experimental del equilibrio entre fases de sistemas azeotrópicos relacionados con biocombustibles. Selección de entrainers de bajo impa…

2016

El problema del calentamiento global hace indispensable plantear alternativas que permitan llevar a cabo una transición desde el actual sistema energético basado en combustibles fósiles hacia otro en el que tengan mayor presencia las llamas energías “limpias” o renovables. De entre todas ellas, el uso de biocombustibles es una de las opciones más atractivas y con un estado de desarrollo más avanzado. Sin embargo, aún existen una serie de problemas tecnológicos, como por ejemplo la deshidratación de los biocombustibles basados en el bioetanol y biopropanol, pues al tratarse de mezclas azeotrópicas el agua que contienen no puede eliminarse mediante destilación convencional. En este sentido, e…

equilibrio entre fasesbiocombustiblesUNESCO::QUÍMICAbioetanolbiopropanolazeótropo:QUÍMICA [UNESCO]destilación
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Beneficios físicos y psicológicos de la Danza Española en personas mayores

2022

Este estudio titulado: “Beneficios físicos y psicológicos de la Danza Española en las personas mayores”, pretende saber si la danza española es beneficiosa en las personas de 60 o más años en Valencia, España. De este modo, se podrá ayudar al diseño y desarrollo de programas de danza que mejoren la calidad de vida de las personas de edad avanzada. Las personas de edad avanzada sufren el deterioro propio del envejecimiento tanto psicológicos como físicos en los sistemas músculo esquelético, respiratorio, nervioso y cardio circulatorio. Objetivos: 1. General: Valorar los beneficios físicos y psicológicos de un programa de danza terapia en personas mayores basado en la danza española. 2. Espec…

equilibrio estáticopersonas mayoresdanza españolaUNESCO::CIENCIAS MÉDICAS:CIENCIAS MÉDICAS [UNESCO]terapia
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Demo 83. Pompa de jabón flotando en CO2

2013

Objetivo: Observar el equilibrio hidrostático de una pompa de jabón con aire en dos gases con densidades distintas.

equilibrio hidrostáticogasesprincipio de Arquímedesdensidadfluidos
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Widening the possibilities of liquid chromatography through the use of secondary equilibria with additives and hydrophilic interaction chromatography

2019

La cromatografía líquida (CL) de fase inversa (reversed phase liquid chromatography, RPLC) es el modo de CL más habitual en los laboratorios analíticos, debido a su amplia aplicabilidad, fiabilidad, robustez y sensibilidad. Desafortunadamente, la pérdida de eficacia (especialmente para compuestos básicos, cuyos picos anchos y asimétricos se explican principalmente por la interacción con los grupos silanol residuales aniónicos presentes en el empaquetamiento de la columna), y la retención inadecuada de diversos compuestos (demasiado cortos o excesivos), dificultan una aplicabilidad más universal de este modo cromatográfico. Desde el desarrollo de la técnica, se ha dedicado mucho esfuerzo par…

equilibrios secundarioslíquidos iónicosUNESCO::QUÍMICAsurfactantescromatografía líquida de fase inversacromatografía líquida de interacción hidrofílica:QUÍMICA [UNESCO]
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Enhancement of Hydrolysis through the Formation of Mixed Heterometal Species: Al3+/CH3Sn3+ Mixtures

2013

ABSTRACT: The hydrolysis of mixed-metal cations (Al3+/CH3Sn3+) was studied in aqueous solutions of NaNO3, at I = 1.00 ± 0.05 mol·dm−3 and T = 298.15 K, by potentiometric technique. Several hydrolytic mixed species are formed in this mixed system, namely, Alp(CH3Sn)q(OH)r with (p, q, r) = (1, 1, 4), (1, 1, 5), (1, 1, 6), (2, 1, 4), (1, 2, 5), (1, 4, 11), (1, 3, 8), and (7, 6, 32). The stability of these species, expressed by the equilibrium: pAl3+ + qCH3Sn3+ + rOH− = Alp(CH3Sn)q(OH)r 3(p+q)−r, βpqr OH, can be modeled by the empirical relationship: log βpqr OH = −3.34 + 2.67p + 9.23(q + r). By using the equilibrium constant Xpqr relative to the formation reaction: pAl(p+q)(OH)r + q(CH3Sn)(p+q…

equilibrium analysiequilibrium analysis; mixed hydrolysis of metal ions; aluminium(III); monomethyltin(IV)monomethyltin(IV)Aqueous solutionChemistryStereochemistryGeneral Chemical EngineeringPotentiometric titrationEmpirical relationships Formation reaction Mixed species Mixed systems Potentiometric techniqueGeneral ChemistryPotentiometric techniqueMedicinal chemistryTurn (biochemistry)HydrolysisMixed systemsMixed speciesMixed systemsMixed speciesEmpirical relationshipsSettore CHIM/01 - Chimica AnaliticaSolubilityaluminium(III)mixed hydrolysis of metal ionFormation reactionEquilibrium constantJournal of Chemical & Engineering Data
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Predicting the equilibrium bed slope in natural streams using a stochastic model for incipient sediment motion

2011

equilibrium bed slope fluvial hydraulics incipient motionSettore AGR/08 - Idraulica Agraria E Sistemazioni Idraulico-Forestali
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The Born–Oppenheimer equilibrium bond distance of GeO from millimetre- and submillimetre-wave spectra and quantum-chemical calculations

2014

The millimetre- and submillimetre-wave spectra of the five common isotopologues of (GeO)-O-16 in their electronic and vibrational ground state have been recorded in the spectral region 115-732GHz; for (GeO)-Ge-74-O-16, the rotational spectrum in the v = 1 state has been detected as well. Exploiting the high precision of the measurements, the Born-Oppenheimer breakdown parameter Delta(Ge)(01) could be determined from a Dunham analysis of the spectral data, whereas Delta(O)(01) was obtained from quantum-chemical calculations, because of the lack of high-precision measurements for the (GeO)-O-18 isotopologues. From the rotational equilibrium constant, the Born-Oppenheimer equilibrium distance …

equilibrium bond distanceBorn-Oppenheimer breakdownrotational spectrumChemistryBiophysicsBorn–Oppenheimer approximationCondensed Matter PhysicsSpectral linequantum-chemical calculationBond lengthsymbols.namesakeRotational spectrumsymbolsMillimeterIsotopologuePhysical and Theoretical ChemistryAtomic physicsGround stateMolecular BiologyAstrophysics::Galaxy AstrophysicsEquilibrium constant
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Rotational spectrum of silyl chloride: hyperfine structure and equilibrium geometry

2012

The Lamb-dip technique was employed to record the rotational spectra of two isotopic species of silyl chloride, namely (28)SiH3Cl and (29)SiH3Cl, in order to investigate their hyperfine structure. High-accuracy quantum-chemical computations were employed to predict the hyperfine parameters involved and to support the experimental investigation. Analysis of the experimental spectra led to an improvement in the accuracy of the known spectroscopic constants as well as allowed us to determine additional spectroscopic parameters for the first time. Furthermore, the equilibrium structure of silyl chloride was reinvestigated using both theoretical and experimental data. The best theoretical and se…

equilibrium structureSilylationChemistryBiophysicsquantum-chemical calculationsCondensed Matter PhysicsEquilibrium geometryChlorideSpectral linehyperfine parameterComputational chemistryRotational spectrummedicinePhysical and Theoretical ChemistryAtomic physicsMolecular BiologyHyperfine structuresilyl chloridemedicine.drugLamb-dip technique
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Numerical and Experimental Study of Friction Loss in Hydrostatic Motor

2012

Published version of an article in the journal: Modeling, Identification and Control. Also available from the publisher at: http://dx.doi.org/10.4173/mic.2012.3.2 Open access This paper presents a numerical and experimental study of the losses in a hydrostatic motor principle. The motor is designed so that the structural deflections and lubricating regimes between moving surfaces and, subsequently, the leakage and friction losses, can be controlled during operation. This is done by means of additional pressure volumes that influence the stator deflection. These pressures are referred to as compensation pressures and the main emphasis is on friction or torque loss modeling of the motor as a …

experimental verificationEngineeringbusiness.industryVDP::Technology: 500Mechanical engineeringFriction losslcsh:QA75.5-76.95hydrostatic motorComputer Science Applicationslaw.inventionmixed lubricationIdentification (information)Control and Systems EngineeringlawModeling and Simulationlcsh:Electronic computers. Computer scienceHydrostatic equilibriumbusinessSoftwarefriction loss
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