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  • constraints  (1)
  • mRNA regulation  (1)
  • 1995-1999  (1)
  • 1985-1989  (1)
  • 1
    Electronic Resource
    Electronic Resource
    The principle of virtual work in mechanical and electromechanical systems (1995)
    Springer
    Archive of applied mechanics 65 (1995), S. 390-400 
    Details
    ISSN: 1432-0681
    Keywords: virtual work ; electromechanical systems ; unifying modelling ; constraints ; mechatronics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Summary The principle of virtual work is applied to electromechanical systems as the foundation of a unifying concept for modelling mechatronical systems. After the presentation of an important result in the field of mechanics, the expansion of the principle on electrical networks and electromechanical systems is shown. The use of the principle of virtual work in the domain of electromechanics yields an analogous form to the central equation of mechanics which is valid for holonomic and nonholonomic systems. The electrotechnical part of the system is confined to networks. The derivation of the mathematical model is demonstrated on the example of a simple electromechanical oscillation circuit. In addition, the physical systems are separately treated, taking into account the explicit constraints on the basis of the Lagrangian multiplier method.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00787532
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  • 2
    Electronic Resource
    Electronic Resource
    Phytochrome regulation of mRNA levels of ribulose-1,5-bisphosphate carboxylase in etiolated rye seedlings (Secale cereale) (1987)
    Springer
    Plant molecular biology 10 (1987), S. 21-33 
    Details
    ISSN: 1573-5028
    Keywords: mRNA regulation ; phytochrome ; ribulose-1,5-bisphosphate carboxylase ; rye ; transcription
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The effect of red light and far-red light on the appearance of mRNA for the small and large subunit of ribulose-1,5-bisphosphate carboxylase in rye seedlings has been analysed. Irradiation of etiolated seedlings with a pulse of red light increased the mRNA level of the small subunit by a factor of 7–10 and that of the large subunit by a factor of 3. A pulse of far-red light resulted in a much lower, but measurable increase. The effect of red light is reverted by an immediate far-red pulse, demonstrating the classical phytochrome response.In vitro transcription experiments with nuclei isolated from red light-treated seedlings showed that the transcription rate of the small subunit mRNA was increased only by a factor of 1.5–2.5, indicating posttranscriptional as wells as transcriptional regulations of the small subunit of ribulose-1,5-bisphosphate carboxylase.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00014183
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    Paper (German National Licenses)
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