نتایج جستجو برای: bed size

تعداد نتایج: 601588  

2013
Sauro Pierucci Jiří J. Klemeš Alessandro Erto Amedeo Lancia Dino Musmarra

The present work deals with the study of the adsorption of Trichloroethylene (TCE) onto a commercial granular activated carbon (GAC). Thermodynamic (batch) and dynamic (fixed-bed column) tests were carried out, under a wide range of operating conditions. In particular, adsorption isotherms were preliminary determined to support the investigation on a fixed-bed column at lab-scale. The main flui...

This study investigated the effect, on reactor performance and biomass retention inside the bed, of the material used to make the supports of anaerobic fixed-bed reactors. Three inert supports of similar shape but made of three different materials polyvinyl chloride, polypropylene, high-density polyethylene were manufactured and used. All three supports had the same specific surface area but di...

A fluidized bed reactor that is operating in the bubbling regime has been developed for the conversion of bio-oils to syngas.The reactor consists of a 7.6 cm I.D. (or internal diameter) bed, with an expanded freeboard. The volume of the reactor can be adjusted to vary the gas residence time. This reactor has been used to carry out either thermal or catalytic cracking for reforming bio-oils.A ga...

Azadeh Nadjarzadeh, Elham Razmpoosh, Maryam Haghani, Sara Safi, Shahnam Abolghasemi,

Background: This descriptive study sought to assess the relation of anxiety, depression, and happiness with binge eating disorders (BED) among overweight and obese individuals. Methods: To conduct this study, 200 individuals who referred to Nutrition Clinics in Isfahan, were selected randomly. They were asked to complete some  questionnaires which were then scored according to Gormally sca...

2014
Ali Asgar Attarwala Flavia Molina-Duran Karen-Anett Büsing Stefan O. Schönberg Dale L. Bailey Kathy Willowson Gerhard Glatting

Yttrium-90 is known to have a low positron emission decay of 32 ppm that may allow for personalized dosimetry of liver cancer therapy with (90)Y labeled microspheres. The aim of this work was to image and quantify (90)Y so that accurate predictions of the absorbed dose can be made. The measurements were performed within the QUEST study (University of Sydney, and Sirtex Medical, Australia). A NE...

Journal: :Epj Web of Conferences 2021

Particle shape can significantly affect the bubble dynamics of bubbling fluidized beds (BFB). In this paper, findings obtained from simulations using CFD-DEM are summarized to discuss effect particle on and properties such as size, velocity at a single orifice uniform bed. Particles with aspect ratios 0.5 (oblate), 1 (spherical) 2 (prolate) employed represent disc-like, spherical rod-like parti...

2005
MICHAEL P. LAMB JEFFREY D. PARSONS

We performed a series of laboratory experiments to investigate the interactions of a turbulent wave boundary layer with a predominantly silt-size sediment bed. Quasi-steady, turbulent, highdensity suspensions (HDS) formed over a wide range of wave conditions and had near-bed (;1 mm above bed) concentrations ranging from 17 to 81 g/l scaling roughly with the wave orbital velocity. HDS were defin...

2008
Arvind Singh Stefano Lanzoni Efi Foufoula-Georgiou

The dynamics of river bed evolution are known to be notoriously complex affected by near-bed turbulence, the collective motion of clusters of particles of different sizes, and the formation of bedforms and other large-scale features. In this paper, we present the results of a study aiming to quantify the inherent nonlinearity and complexity in gravel bed dynamics. The data analyzed are bed elev...

Journal: :Journal of applied physiology 1998
M S Clarke M M Bamman D L Feeback

Using a terrestrial model of spaceflight (i.e., bed rest), we investigated the amount of myofiber wounding and fibroblast growth factor (FGF) release that occurs during unloading. Myofiber wounding was determined by serum levels of the creatine kinase MM (CKMM) isoform before and after bed rest. Serum levels of both acidic FGF (aFGF) and basic FGF were also determined. A second group of subject...

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