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  • 1
    Electronic Resource
    Electronic Resource
    A device for cultivation of plant and animal cells (1985)
    Springer
    Biotechnology letters 7 (1985), S. 467-470 
    Details
    ISSN: 1573-6776
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary A device is described for cultivation of suspension cultures of plant and animal cells in plastic bags placed on carrier plates in a thermostat box. Pendular motion of these plates ensures mixing of the fluid and aids in transfer of oxygen pumped above the fluid surface.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01199860
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Laboratory fermentors for submerged fermentation (1963)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 5 (1963), S. 231-242 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: In the present paper the authors described laboratory fermentors used in the Antibiotics Research Institute since 1958 for research concerning the technology of the biosynthesis of antibiotics and amino acids and other aerobic fermentations. The lids of the fermentors are made from stainless steel, the vessels are made from glass. The fermentors are placed, always four each, in eight water baths with automatic temperature regulation within a range of ±0.5°C. Details regarding construction, auxiliary equipment, and working procedures used for the sterilization of fermentors and media, inoculation, injection of additives, and defoaming are given. The set-up for one-stage and multi-stage, batch and continuous cultivation are discussed.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260050308
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Continuous cultivation of Escherichia coli possessing high penicillin-acylase activity (1964)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 6 (1964), S. 309-319 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The authors describe continuous cultivations of Escherichia coli possessing high penicillin-acylase activity in corn-steep liquor, peptone, and ammonium phenylacetate containing nutrient medium. If the cultivation is performed in the absence of ammonium phenylacetate the enzymic activities of cells from the batch as well as the continuous cultures are very low. The enzymic activity of cells in the batch process was considerably increased by the addition of 0.015% ammonium phenylacetate to the nutrient medium. Further increase of ammonium phenylacetate concentration did not result in any further increase of acylase activity. Continuous cultivation of the bacteria at the above ammonium phenyl-acetate concentration was unsuccessful, as the enzymic activity of the bacteria constantly decreased during the process. On increasing the concentration of ammonium phenylacetate in the medium to 0.15% the authors succeeded in maintaining the enzymic activity of the bacteria at the same level as in the batch process performed at 0.015% concentration, throughout the whole continuous cultivation. At the dilution rate D = 0.5 hr.-1 the concentration of cells in the culture effluent from the fermentor at the steady state was equal to cell concentration at the end of batch cultivation. In relation to the cultivation time the output of cells in continuous cultivation is almost seven times higher as compared with the batch process.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260060306
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Continuous streptomycin fermentation (1959)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Biochemical and Microbiological Technology and Engineering 1 (1959), S. 379-392 
    Details
    ISSN: 0368-1467
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: A pilot plant unit for continuous cultivation of hyphaeforming micro-organisms, providing for a uniform flow velocity in fermentations on suspension media with a massive growth of mycelium, is described. For the maintenance of aseptic conditions, over-pressre of air is maintained in the whole equipment. This equipment has been used for studies of the continuous biosynthesis of streptomycin. A three-stage fermentation proved the most advantageous. The first stage serves for multiplication of the inoculum; the second and third for the formation of the antibiotic. The system was maintained for 300-400 h with yields amounting to 2,000-2,500 u. of streptomycin/ml without any signs of contamination or degeneration of the growing culture.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jbmte.390010405
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  • 5
    Electronic Resource
    Electronic Resource
    Continuous cultivation of micro-organisms: A new approach and possibilities for its use (1961)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Biochemical and Microbiological Technology and Engineering 3 (1961), S. 357-376 
    Details
    ISSN: 0368-1467
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: When trying to turn a batch fermentation process into a continuous process, many important factors must be repected. A new approach is presented by means of which it is possible to reproduce in a continuous system those changes (both inside the cells and in the environment) which are functions of elapsed time (lag-type changes, sudden changes occurring at a constant growth rate of the micro-organisms, etc.). Special attention is paid to lag-type changes. In the hitherto described apparatuses for continuous cultivation it was difficult to follow changes which are functions of time. The use of a multi-stage apparatus is therefore suggested, and a method of cultivation, which through adjusting retention times in individual cultivation vessels allows a detailed study of such changes, is proposed. Basic equations concerning the growth of microorganisms in the described apparatus are derived and some examples of the possible practical use of the new approach are presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jbmte.390030405
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    Paper (German National Licenses)
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