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Reduction of iron oxides by carbon in a circulating fluidized bed reactor

A theoretical analysis of the reduction of iron oxides by carbon in a circulating fluidized bed reactor is considered in this study. Iron oxide and coal particles are fast fluidized in the main column by a hot stream of gases (N2–CO–CO2–H2–H2O). The analysis considers kinetic and hydrodynamic factors in the reactor and assumes the reduction reaction by carbon to proceed through gaseous intermediat

Isolation and characterisation of a 17-kDa staphylococcal heparin-binding protein with broad specificity

A previous study reported the ability of staphylococci to bind heparin and heparin-dependent host growth factors. The present study isolated and identified heparin- and basic fibroblast growth factor (bFGF)-binding surface components of S. epidermidis strain RP12 and S. haemolyticus strain SM 131. The staphylococcal heparin-binding component(s) were purified by affinity chromatography on heparin-S

Particle-visualisation - a tool for determination of rise velocities

Particles from post denitrifying Kaldnes Moving Bed(TM) Process were studied using an optical borescope, a visualisation technique that provides opportunities for both qualitative and quantitative studies of the separation mechanism in Dissolved Air Flotation (DAF). Rise rates for particle/bubble aggregates were estimated showing great variability. Two groups of aggregates were distinguished; rela

Benchmark Simulation Model No 2 in Matlab-Simulink: towards plant-wide WWTP control strategy evaluation

In this paper, implementation of the Benchmark Simulation Model No 2 (BSM2) within Matlab-Simulink is presented. The BSM2 is developed for plant-wide WWTP control strategy evaluation on a long-term basis. It consists of a pre-treatment process, an activated sludge process and sludge treatment processes. Extended evaluation criteria are proposed for plant-wide control strategy assessment. Default o

Exotic Decay Modes in Rotating Nuclei

Recent results and experiments are presented aiming at nuclear structure studies in the vicinity of the doubly-magic isotope Ni-56. The feature of prompt particle emission is revised, and new studies of mirror nuclei in the upper fp shell are briefly discussed.

Detection of malformations in chromosomally normal fetuses by routine ultrasound at 12 or 18 weeks of gestation - a randomised controlled trial in 39 572 pregnancies

Objective To compare the antenatal detection rate of malformations in chromosomally normal fetuses between a strategy of offering one routine ultrasound examination at 12 gestational weeks (gws) and a strategy of offering one routine examination at 18 gws. Design Randomised controlled trial. Setting Multicentre trial including eight hospitals. Population A total of 39 572 unselected pregnant women

Faraway, so Close! : The Changing Geographies of Regional Innovation

Popular AbstractInnovation, skapandet av nya produkter och processer, är i hög grad ojämnt fördelat över det geografiska rummet. Denna ojämna fördelning har stor betydelse för regionala ekonomiers relativa framgång. Geografiskt koncentrerat kunskapsutbyte mellan företag och andra organisationer är många gånger avgörande för dessa aktörers sammanlagda innovativa kapacitet, och därmed för regionens Innovation, the act and outcome of making something novel, is unevenly distributed across the geographical landscape. This uneven distribution has a profound impact on the differential success of regional economies. Localized learning between co-located firms and organizations provides an important source of increased innovation for regions to face challenges posed by increasingly global competiti

Proteomics principles and challenges

Proteomics studies rely on high-resolving separation techniques whereby the biological complexity can be unraveled. Both gel-based and liquid-phase separation principles are needed in order to mine deeper into the low abundant area of the proteins expressed in human cell samples. The expression levels that can be reached today with proteomics technology are still only reaching part of all proteins

Thermometry Using Laser-Induced Emission from Thermographic Phosphors: Development and Applications in Combustion

Temperature is a fundamental thermodynamic parameter used to describe physical, chemical and biological processes. Much effort is made to measure temperature accurately in a wide variety of applications, making temperature one of the most extensively measured parameters. In combustion as in many other applications, temperature plays a substantial role in helping to maintain an efficient and clean

Energy policy and the role of bioenergy in Poland

Poland, as many other countries, has ambitions to increase the use of renewable energy sources. In this paper, we review the current status of bioenergy in Poland and make a critical assessment of the prospects for increasing the share of bioenergy in energy supply, including policy implications. Bioenergy use was about 4% (165PJ) of primary energy use (3900PJ) and 95% of renewable energy use (174

Pollen harvesting and reproductive rates in specialized solitary bees

Andrena humilis is an endangered oligolectic solitary bee and has declined in recent decades throughout western Europe. The aim of this study was to explore the pollen harvesting pattern and to determine the reproductive rate in specialized andrenid bees. We measured the amount of pollen required to produce one brood-cell, the pollen harvesting rate and compared our results with data for other spe

Proton MR spectroscopy and preoperative diagnostic accuracy: an evaluation of intracranial mass lesions characterized by stereotactic biopsy findings

BACKGROUND AND PURPOSE: MR imaging has made it easier to distinguish among the different types of intracranial mass lesions. Nevertheless, it is sometimes impossible to base a diagnosis solely on clinical and neuroradiologic findings, and, in these cases, biopsy must be performed. The purpose of this study was to evaluate the hypothesis that proton MR spectroscopy is able to improve preoperative d