Search results for " Suspension"

showing 10 items of 107 documents

Assessment of particle suspension conditions in stirred vessels by means of pressure gauge technique

2002

In this work the quantitative assessment of the mass of suspended solid particles in stirred vessels is performed using the Pressure Gauge Technique. This is based on the measurements of the pressure increase on the tank bottom due to the presence of suspended solid particles at any agitation speed. The method has the advantages of not utilising visual observations and of easy and inexpensive application to both laboratory and industrial equipment. Very few data are available in literature and the experimental results collected using the present PGT technique and the correlations here proposed are of considerable academic and industrial interest.

Suspended solidsWork (thermodynamics)Industrial equipmentChemistryGeneral Chemical EngineeringSettore ING-IND/25 - Impianti ChimiciMechanical engineeringMineralogyGeneral ChemistryParticle suspensionlaw.inventionPressure gauge techniquePressure measurementlawPressure increaseQuantitative assessmentStirred vesselsParticles suspension
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La perte du pouvoir de suspension préalable à une sanction

1999

International audience

Suspension de fonctions[SHS.DROIT]Humanities and Social Sciences/Law[SHS.DROIT] Humanities and Social Sciences/LawINTERET DU SERVICEDistinction avec la suspension temporaireDISCIPLINE DES AGENTS PUBLICSComputingMilieux_MISCELLANEOUS
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Non-Linear Hysteretic Instability in Rotating Machinery

2013

The destabilizing influence of the shaft hysteresis on the supercritical whirl of rotating machines can be efficiently counterbalanced by proper external dissipative sources in the supports and/or anisotropic suspension systems. The hysteretic effect may be treated either by dry or viscous models obtaining different but somehow similar results in the hypothesis of small dissipation levels. Thus the linear viscous assumption is often accepted as a crude approximation for a straightforward analysis of the whirling instability. Nevertheless the internal friction should be regarded most likely as non-linear and could be approximated for example by Coulombian models taking thus into account also the releasing effect of some shrink-fit coupling present in the mechanical assembly.
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Optical properties of TiO2 suspensions: Influence of pH and powder concentration on mean particle size

2007

WOS: 000250584100025

Work (thermodynamics)Settore ING-IND/24 - Principi Di Ingegneria ChimicaEffective sizeMaterials scienceTITANIUM-DIOXIDEScatteringPARTICULATE SUSPENSIONSGeneral Chemical EngineeringAnalytical chemistryPHOTON-ABSORPTIONAQUEOUS DISPERSIONSGeneral ChemistryPERFORMANCEHETEROGENEOUS PHOTOCATALYTIC SYSTEMSIndustrial and Manufacturing EngineeringSLURRY REACTORSRADIATION ABSORPTIONAgglomerateQUANTUM YIELDSPhotocatalysisParticleParticle sizePhysics::Chemical PhysicsAbsorption (chemistry)OPERATIONAL VARIABLES
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Solid–Liquid Suspensions in Top-Covered Unbaffled Vessels: Influence of Particle Size, Liquid Viscosity, Impeller Size, and Clearance

2014

Particle suspension in liquids is a unit operation commonly encountered in the process industry. Although it is usually carried out in baffled stirred tanks, there are some specific applications where the presence of baffles may be undesirable. In the present work solid-liquid suspensions are investigated in a radially stirred unbaffled tank provided with a top cover. The minimum impeller speed at which all solid particles get suspended (Njs) and the relevant power requirements (Pjs) are assessed. The dependence of these two parameters on physical properties (liquid viscosity, particle concentration, and size) and system geometrical configurations (impeller diameter and clearance) is invest…

Work (thermodynamics)Settore ING-IND/26 - Teoria Dello Sviluppo Dei Processi ChimiciMaterials scienceChromatographyGeneral Chemical EngineeringSettore ING-IND/25 - Impianti ChimiciLiquid viscosityBaffleGeneral ChemistryMechanicsUnit operationSOLID-LIQUID SUSPENSIONIndustrial and Manufacturing EngineeringImpellerSOLID-LIQUID MIXINGParticlesolid liquid suspension stirred tank Njs unbaffled vessel complete suspension power requirementsParticle sizeUNBAFFLED STIRRED VESSELSSolid liquid
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Yiyun Li’s A Thousand Years of Good Prayers and Murakami Haruki’s Men Without Women: Rarefaction and Suspension of Time 时间的稀薄及悬浮：李翊云的 A Thousand Year…

2022

This paper illustrates resonances of style in the two works, "A Thousand Years of Good Prayers" by the Chinese woman writer Yiyun Li and "Men Without Women" by the Japanese author Murakami Haruki, that present some similarities.

Yiyun Li Murakami Haruki A Thousand Years of Good Prayers Men Without Women Rarefaction of Time Suspension of TimeSettore L-OR/21 - Lingue E Letterature Della Cina E Dell'Asia Sud-Orientale
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Interdiction et interruption des poursuites individuelles. Interruption des instances déjà engagées. Absence de suspension du délai de l'action

2016

International audience; (Civ. 3e, 8 octobre 2015, n° 14-18.881, arrêt n° 1031 FS-P+B, Sté Adam c/ Sté Boucherie de la République et a., D. 2015. 2071)

[SHS.DROIT]Humanities and Social Sciences/LawArrêt des poursuites individuellesInstance en cours[SHS.DROIT] Humanities and Social Sciences/LawSAUVEGARDE DES ENTREPRISESSauvegardeAbsence de suspension du délai de l'action
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The structure of gas-filled n-butyl-2-cyanoacrylate (BCA) polymer particles

1995

Abstract The structure of gas-filled poly-[n-butyl-2-cyanoacrylate] (BCA) particles has been demonstrated by negative staining with uranyl acetate, platinum-carbon shadowing of air-dried material and thin sectioning of the aqueous suspension of BCA particles, embedded in water-soluble melamine resin. The polymer shell of the hollow particles possesses a globular outer surface and a smoother inner surface.

chemistry.chemical_classificationMelamine resinMaterials scienceShell (structure)General Physics and AstronomyUranyl acetateCell BiologyPolymerengineering.materialAqueous suspensionNegative stainlaw.inventionPolymer particlechemistry.chemical_compoundChemical engineeringchemistryStructural BiologyCyanoacrylatelawPolymer chemistryengineeringGeneral Materials Scienceskin and connective tissue diseasesMicron
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Synthesis of V-ZrSiO4 solid solutions

1990

This letter describes the results of the preparation of V-ZrSiO 4 solid solutions from a sol or alkoxide and solute salts. This technique allows a greater degree of product formation to be achieved at lower temperatures, as well as the possibility of studying the characteristics of possible solid solutions

chemistry.chemical_compoundAmmonium metavanadateMaterials sciencechemistryChemical engineeringAlkoxideX-ray crystallographyInorganic chemistryGeneral Materials ScienceProduct formationParticle suspensionSolid solutionJournal of Materials Science Letters
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Umsetzungen von polyacroleinen mit formaldehyd. Polymere acroleine. 28. Mitt.1

1963

Polyacroleine wurden in wasriger Suspension und in einem Pyridin-Wasser-Gemisch in Anwesenheit von basischen Katalysatoren mit Formaldehyd umgesetzt. Die Reaktions-produkte enthalten, in Abhangigkeit von den Versuchsbedingungen, neben Carboxylgruppen hauptsachlich primare Alkoholgruppen. Die chemischen Eigenschaften und Vergleiche mit polymeren Modellsubstanzen lassen darauf schliesen, das die gewonnenen Polymeren im wesentlichen aus Methylen-propandiol-1,3-Grundbausteinen aufgebaut sind. Polyacroleins were reacted with formaldehyde in aqueous suspension and in a pyridin water mixture in the presence of basic catalysts. Depending on the experimental conditions the products of the reaction m…

chemistry.chemical_compoundChemistryPolymer chemistryFormaldehydeMethyleneAqueous suspensionDie Makromolekulare Chemie
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