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  • 1
    Electronic Resource
    Electronic Resource
    Measurement of diffusion coefficients in gels using holographic laser interferometry (1993)
    s.l. : American Chemical Society
    Biotechnology progress 9 (1993), S. 436-441 
    Details
    ISSN: 1520-6033
    Source: ACS Legacy Archives
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/bp00022a011
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    A diaphragm diffusion cell applied to ethanol diffusion in agarose gel: A reproducibility study (1991)
    Springer
    Biotechnology techniques 5 (1991), S. 303-306 
    Details
    ISSN: 1573-6784
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary The effective diffusion coefficient of ethanol in a 4 %(w/v) agarose gel at 25°C was measured using a diaphragm diffusion cell. The reproducibility was very good; a standard deviation of only 2% was obtained. The mean value (9.5×10−6 cm2/s) agreed well with available theory and previous investigations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02438668
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Diffusion in gels containing immobilized cells: A critical review (1991)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 38 (1991), S. 439-446 
    Details
    ISSN: 0006-3592
    Keywords: review ; diffusion ; gels ; immobilized cells ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Eleven experimental investigation of diffusion in gels containing immobilized cells are reviewed. The experimental data, which quantitatively express the diffusion coefficient as a function of the cell concentration, are compared with a number of well-known equations developed for mass transfer in heterogeneous media. Based on this comparison, a procedure for the theoretical prediction of effective diffusion coefficients in cell-containing gels is recommended.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260380502
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Direct measurement of intraparticle fluid velocity in superporous agarose beads (1998)
    Chicester [u.a.] : Wiley-Blackwell
    Journal of Molecular Recognition 11 (1998), S. 270-272 
    Details
    ISSN: 0952-3499
    Keywords: superporous agarose ; superpore ; pore flow ; intraparticle convection ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine
    Notes: Superporous agarose beads contain both normal diffusion pores and special, very wide superpores through which part of the chromatographic flow is transported, a situation that may greatly improve the chromatographic performance. For the first time such pore flow was measured directly by following the movement of microparticles (dyed yeast cells) through superporous beads packed in a chromatographic bed. The passage of the microparticles through the superpores and through the interstitial pores was recorded by a microscope/video camera. The video recordings were subsequently used to determine flow paths as well as the convective fluid velocities in both the superpores and the interstitial pores. The superpore fluid velocity was found to be proportional to the ratio between the squares of the respective pore diameters, which is in agreement with the Kozeny-Carman equation. Values for two-dimensional and three-dimensional tortuosity of the flow paths were measured and calculated respectively. Copyright © 1998 John Wiley & Sons, Ltd.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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    Paper (German National Licenses)
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