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  • 1
    ISSN: 0304-4165
    Keywords: (Leukocyte membrane) ; Phorbol ester ; Phospholipid ; Protein kinase C
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Medicine , Physics
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-1114
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract A two-component, hot-film probe has been developed, to measure the wall shear stress as a vector quantity in time-dependent flows. The probe has been applied for the measurements of the bottom shear stress in a flow generated by combined waves and current in a water basin where the magnitude and the direction of the bottom shear stress varied periodically with respect to time. The probe has also been used to measure the bottom shear stress around a vertical cylinder exposed to water waves generated in a wave flume.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract   Reductive dechlorination of tetrachloroethene was studied in a mesophilic upflow anaerobic sludge blanket reactor. Operating the reactor in batch mode the dynamic transformation of tetrachloroethene, trichloroethene and dichloroethene (DCE) was monitored. Tetrachloroethene was reductively dechlorinated to trichloroethene, which again was dechlorinated at the same rate as DCE was produced. DCE showed a lag period of 40 h before transformation was observed. During normal reactor operation trans-1,2-DCE was the major DCE isomer, followed by cis-1,2-DCE. Small amounts of 1,1-DCE but no vinyl chloride were detected. When the influent tetrachloroethene concentration was increased from 4.6 μM to 27 μM, the transformation rate increased, indicating that the system was not saturated with tetrachloroethene. The main organic component in the effluent was acetate, indicating that the aceticlastic methane-producing bacteria were inhibited by the chlorinated ethenes.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The SOFC technology under development at Risø National Laboratory (RISØ) andTopsoe Fuel Cell A/S (TOFC) is based on an integrated approach ranging from basic materialsresearch on single component level over development of cell and stack manufacturing technology tosystem studies and modelling. The effort also comprises an extensive cell and stack testingprogram. Systems design, development and test is pursued by TOFC in collaboration with variouspartners. The standard cells are thin and robust with dimensions of 12 x 12 cm2 and cell stacks arebased on internal manifolding. Production of cells is being up-scaled continuously. The durabilityof the standard stack design with standard cells has been tested for more than 13000 hours includingnine full thermal cycles with an overall voltage degradation rate of about 1% per 1000 hours.Recently, the degradation rate has been significantly reduced by introduction of improved stackcomponent materials. 75-cell stacks in the 1+ kW power range have been tested successfully. Stackshave been delivered in a pre-reduced state to partners and tested successfully in test systems withnatural gas as fuel. The consortium of TOFC and RISØ has an extended program to develop theSOFC technology all the way to a marketable product. Stack and system modelling including costoptimisation analysis is used to develop multi kW stack modules for operation in the temperaturerange 700-850oC. To ensure the emergence of cost-competitive solutions, a special effort is focusedon larger anode-supported cells as well as a new generation of SOFCs based on porous metalsupports and new electrode and electrolyte materials. The SOFC program comprises developmentof next generation of cells and multi stack modules for operation at lower temperature withincreased durability and mechanical robustness in order to ensure long-term competitiveness
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  • 5
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Lanthanum-transition metal mixed oxides, with the general formula La1−x M x BO3, have been prepared, whereinM stands for Ca and Sr, andB stands for one or more transition metals selected from the group consisting of Cr, Mn, Fe, Co and Ni, where 0⩽x⩽0.50. A drip pyrolysis method has been developed to synthesize the mixed oxides at low temperature (550
    Type of Medium: Electronic Resource
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