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  • Capillary columns  (1)
  • Chemical Engineering  (1)
  • Ventilation shock losses  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Analysis of ventilation shock losses by finite element method (1987)
    Springer
    Geotechnical and geological engineering 5 (1987), S. 377-390 
    Details
    ISSN: 1573-1529
    Keywords: Ventilation shock losses
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Summary This paper presents an analysis of ventilation shock losses using the two-dimensional finite element method. It outlines the finite element formulation, in which the ventilation air flow is assumed to be a steady-state, viscous, incompressible and fully developed turbulent flow. In addition, the modified version of Van Driest model is assumed for the effective kinematic viscosity. The shock losses were estimated for the case simulating the airway configuration for (a) split, (b) junction and (c) gradual contraction. The results are compared and discussed with the shock loss data available in the ventilation literature. To estimate the shock losses, the flow solution in terms of pressure was first obtained for each airway configuration using the finite element method. The solution was then compared with that of a straight airway for estimating the difference in the head losses.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01552752
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Preparation and gas chromatographic characterization of dibenzyl crown ether stationary phases (1993)
    Springer
    Chromatographia 37 (1993), S. 374-380 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Crown ether polysiloxane phases ; Capillary columns
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Two crown ethers, di(tert-butylbenzo)-propyl-15-crown-5 polysiloxane (PSO-DTB-15C5) and dibenzo-propyl-15-crown-5 polysiloxane (PSO-DB-15C5) have been synthesized and coated onto fused-silica capillary columns. The chromatographic characteristics, including column efficiency, polarity, phase transition temperature, operating temperature range and selectivity, were studied. Excellent selectivity was obtained for the separation of polar position isomers, especially phenol and dinitrotoluene isomers. The separation mechanism is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02272251
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Effect of pore size distribution on enzyme immobilization in porous supports (1989)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 35 (1989), S. 1551-1554 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690350917
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    Paper (German National Licenses)
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