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  • 1990-1994  (10)
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Material
Years
Year
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    An Expert System for Cultivating Operations (1990)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 589 (1990), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1990.tb24271.x
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    An on-line advisory control system for the lactic acid fermentation process (1994)
    Springer
    Applied microbiology and biotechnology 42 (1994), S. 204-211 
    Details
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract A fuzzy expert system was developed for online diagnosing and controlling of bioprocesses. The system was constructed in object-oriented Smalltalk/V for diagnosing and controlling of bioprocesses. Lactic acid fermentation with an industrial strain ofLactobacillus casei was chosen as the model system. The performance of the fuzzy expert system and the knowledge base utilizing experts' knowledge and several facts obtained from the experiments were successfully validated with on-line fermentations. The fuzzy expert system could diagnose a fault on-line and give reasonable advice to the process operator. In order to achieve the diagnosing faculty, a database, a knowledge base, and both backward and forward chaining procedures were implemented employing the object-oriented programming environment. A defuzzifier was implemented in the system to achieve on-line control. In order to realize a decision-making system with a human operator and a fuzzy expert system, a new control strategy namedAdvice was also introduced. Several cultivations were carried out in order to collect knowledge on the effects concerned with inoculum properties to the process and to construct a database including standard time-course profiles. The performance of the fuzzy expert control system was successfully tested with on-line experiments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00902718
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    An on-line advisory control system for the lactic acid fermentation process (1994)
    Springer
    Applied microbiology and biotechnology 42 (1994), S. 204-211 
    Details
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract  A fuzzy expert system was developed for on-line diagnosing and controlling of bioprocesses. The system was constructed in object-oriented Smalltalk/V for diagnosing and controlling of bioprocesses. Lactic acid fermentation with an industrial strain of Lactobacillus casei was chosen as the model system. The performance of the fuzzy expert system and the knowledge base utilizing experts’ knowledge and several facts obtained from the experiments were successfully validated with on-line fermentations. The fuzzy expert system could diagnose a fault on-line and give reasonable advice to the process operator. In order to achieve the diagnosing faculty, a database, a knowledge base, and both backward and forward chaining procedures were implemented employing the object-oriented programming environment. A defuzzifier was implemented in the system to achieve on-line control. In order to realize a decision-making system with a human operator and a fuzzy expert system, a new control strategy named Advice was also introduced. Several cultivations were carried out in order to collect knowledge on the effects concerned with inoculum properties to the process and to construct a database including standard time-course profiles. The performance of the fuzzy expert control system was successfully tested with on-line experiments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00902718
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    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Diagnosing lactic acid fermentation based on specific rates of growth, substrate consumption and product formation (1992)
    Springer
    Bioprocess and biosystems engineering 7 (1992), S. 319-323 
    Details
    ISSN: 1432-0797
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract The on-line calculated specific rates of growth, substrate consumption and product formation were used to diagnose microbial activities during a lactic acid fermentation. The specific rates were calculated from on-line measured cell mass, and substrate and product concentrations. The specific rates were more sensitive indicators of slight changes in fermentation conditions than such monitored data as cell mass or product concentrations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00705162
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    The reaction γ +d → π+ + π− +p + n between 570 and 850 MeV andΔ ++ Δ − production (1992)
    Springer
    The European physical journal 344 (1992), S. 335-344 
    Details
    ISSN: 1434-601X
    Keywords: 25.20.Lj ; 13.60.Rj ; 14.20.Gk
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The reaction γ+d → π++π− +p + n has been measured in a kinematically complete way at incident photon energies from 570 to 850 MeV in steps of 40 MeV. From detailed comparison of measured data with results of event simulations, it is concluded that three different mechanisms, the quasi-free, double-delta and phase space productions, contribute to the reaction. Each of the cross sections corresponding to these mechanisms is determined separately.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01303029
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Utilizing the tubular bioreactor for continuous recovery of secreted fusion protein from recombinant Escherichia coli (1991)
    Springer
    Bioprocess and biosystems engineering 7 (1991), S. 145-150 
    Details
    ISSN: 1432-0797
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract In order to improve the cultivation properties of a traditional continuous stirred tank reactor (CSTR), we introduced a circulation unit made of four inorganic membranes in stainless steel tubes in parallel configuration, the so-called Tubular Bioreactor (TBR). Furthermore, the TBR outlet tube, which has a restriction nozzle at the end, was installed on top of the fermentor vessel, thereby creating a strong jet flow into the reactor and thus improving the mixing and the oxygen transfer rate. The k La could be increased by approximately 50%. This setup was used for cultivations of recombinant Escherichia coli in a minimal medium and high cell density. More than 50 g dry cell mass/dm3 was obtained. Simultaneously, we have produced an elongated form of human insulin-like growth factor II, which was a secreted fusion protein utilizing the E. coli secretion system based on staphylococcus protein A. The product could be recovered continuously through the TBR-membrane.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00387409
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Production of saikosaponins by tissue culture of Bupleurum falcatum L. (1991)
    Springer
    Bioprocess and biosystems engineering 7 (1991), S. 97-100 
    Details
    ISSN: 1432-0797
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract The studies for production of saikosaponins by tissue culture of Bupleurum falcatum L. were carried out to produce saikosaponins with several kinds of media and plant hormones. Among the media and plant hormones studied, Gamborg's B-5 [23] medium containing 0.5 ppm kinetin (k) and 1.0 ppm 3-indolebutyric acid (IBA) was the most effective medium and hormone for production of saikosaponins. The highest content of saikosaponin-d in the dried cells was 0.26%, which was similar to a concentration of Bupleuri Radix.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00369420
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    A knowledge based system for diagnosing microbial activities during a fermentation process (1992)
    Springer
    Bioprocess and biosystems engineering 7 (1992), S. 331-334 
    Details
    ISSN: 1432-0797
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract A knowledge based system, LAexpert, was developed to diagnose microbial activities during a fermentation process on the basis of specific rates determined on-line. The LAexpert is a supervisor for a process control system and assists operators in fault diagnosis. The LAexpert was implemented using a fuzzy expert system shell based on the object oriented programming tool Smalltalk V/Mac running in a Macintosh II computer. The shell can handle uncertainties both in the measurements and knowledge by fuzzy reasoning.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00369487
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    Paper (German National Licenses)
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  • 9
    Electronic Resource
    Electronic Resource
    Critical fibre length and tensile strength for carbon fibre-epoxy composites (1994)
    Springer
    Journal of materials science 29 (1994), S. 1174-1178 
    Details
    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 The tensile strength of epoxy resin reinforced with a random-planar orientation of short carbon fibres decreases with increasing temperature. This decrease may be estimated by the strain rate and temperature dependence of both the yield shear strength at the fibre-matrix interphase and the critical fibre length obtained by taking the distribution of fibre strength into consideration. The experimental value at room temperature is smaller than the calculated value. It is inferred that this result is attributed to the stress concentration caused by ineffective fibres produced during preparation which were shorter than the critical fibre length.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00975060
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    Paper (German National Licenses)
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  • 10
    Electronic Resource
    Electronic Resource
    Measurement of the reactionse + e −→μ+μ− ande + e −→τ+τ− between $$\sqrt s = 50$$ and 60.8 GeV (1990)
    Springer
    The European physical journal 48 (1990), S. 13-21 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The angular distributions of the reactione + e −→μ+μ− ande + e +→τ+τ− have been measured between $$\sqrt s = 50$$ and 60.8 GeV with the VENUS detector at TRISTAN. The average total cross section and the forward-backward charge asymmetry for μ-pair production are observed to be 28.3±1.4±0.8 pb and (−29.0 −4.8 +5.0 ±0.5)%, and those for τ-pair production are 27.6±1.7±1.0 pb and (−32.8 −6.2 +6.4 ±1.5)% at $$\langle \sqrt s \rangle $$ . These values are consistent with the predictions of the standard model of electroweak interactions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01565601
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    Paper (German National Licenses)
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