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  • suspension culture  (3)
  • Polymer and Materials Science  (2)
  • Chemical Engineering  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Cell retention-chemostat studies of hybridoma cells - analysis of hybridoma growth and metabolism in continuous suspension culture in serum-free medium (1993)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 42 (1993), S. 185-195 
    Details
    ISSN: 0006-3592
    Keywords: hybridoma metabolism ; perfusion culture ; suspension culture ; cell retention ; antibody productivity ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The steady-state metabolic parameters for a hybridoma cell line have been determined in continuous suspension-perfusion culture over a wide range of perfusion rates and cell bleed rates. Significant increases in viable cell concentrations and volumetric productivities were achieved at high perfusion rates and low cell bleed rates. At the low growth rates examined in this study, cellular metabolism shifted to become more oxidative, and as a result, the fraction of consumed substrate converted to inhibitory metabolic by-products was reduced. Specific antibody productivity was found to be non-growth associated. © 1993 John Wiley & Sons, Inc.
    Additional Material: 13 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260420206
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Transient responses of hybridoma cells in continuous culture to step changes in amino acid and vitamin concentrations (1994)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 44 (1994), S. 303-321 
    Details
    ISSN: 0006-3592
    Keywords: hybridoma metabolism ; continuous culture ; suspension culture ; antibody productivity ; amino acids ; vitamins ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The effects of step-change increase in the concentrations of amino acids and vitamins on the metabolism, growth, and antibody productivity of a murine hybridoma cell line grown in continuous culture on serum-free medium are presented. Additions of the amino acids cysteine with methionine, tryptophan, and isoleucine with valine and vitamin B12 (as cyanocobalamin) resulted in significant increases in viable cell concentrations. Additions of aspartate with asparagine, and threonine with vitamin B1 (as thiamine hydrochloride) resulted in significant increases in final antibody concentrations. Substantial decrease in the fraction of amino acid nitrogen excreted as ammonia occurred upon supplementation with three times the normal concentrations of branched chain amino acids. Decreases in the fraction of amino acid nitrogen converted to ammonia were paralleled by increases in the fraction converted to alanine. © 1994 John Wiley & Sons, Inc.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260440308
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    A kinetic analysis of hybridoma growth and metabolism in continuous suspension culture on serum-free medium (1991)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 38 (1991), S. 733-741 
    Details
    ISSN: 0006-3592
    Keywords: hybridoma metabolism ; suspension culture ; antibody production rate ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The steady-state metabolic parameters for a murine hybridoma cell line have been determined in continuous suspension culture over a wide range of dilution rates. Long-term adaption occurred over seven months in culture and resulted in lower glucose consumption rates, reduced lactate production, higher cell viability, and, consequently, growth rates more nearly matching the dilution rate. Antibody production rates decreased over the first two months and then remained stable for at least 75 days. The antibody production rate was not found to be growth associated. Steadystate amino acid uptake rates are presented for a wide range of growth rates.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260380707
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Advanced biochemical engineering. By H. R. Bungay and Georges Belfort, Eds., John Wiley and Sons, New York, 1987 (1987)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 33 (1987), S. 2096-2097 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690331232
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Effect of collagen crosslinking on the rate of resorption of implanted collagen tubing in rabbits (1977)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Biomedical Materials Research 11 (1977), S. 297-314 
    Details
    ISSN: 0021-9304
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine , Technology
    Notes: Collagen tubes were tanned with glutaraldehyde for different periods of time. Some were oxidized with periodate and sterilized with either 60Co (1.5 Mrad) or propylene oxide. The tubes were coated with polyfilamentous polyester fabric, filled with x-ray contrast material, and implanted subcutaneously in rats and rabbits. Rate of resorption was ascertained by x-ray procedure of progressive leakage of contrast material.A close relation between tanning time of the collagen fabric-combined prostheses and rate of their resorption in subcutis was found in both rats and rabbits. In rabbits, however, the implants were resorbed at a significantly faster rate than in rats. No effect of oxidation of collagen on the resorption was observed. Collagen tubes tanned for shorter time periods and sterilized with propylene oxide were more resistant to degradation than those sterilized with irradiation. This difference was absent, however, with material tanned for longer times.The mechanism of resorption of implanted collagen tubes was studied by morphological methods. The role of inflammatory cells in resorption is documented. The paper indicates the advantages as well as limits of the x-ray method of studying the resorption rate of biodegradable materials.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jbm.820110213
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Heat precipitation of poly (γ-hydroxy-L-proline) (1978)
    New York : Wiley-Blackwell
    Biopolymers 17 (1978), S. 1381-1384 
    Details
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bip.1978.360170521
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    Paper (German National Licenses)
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