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  • 1
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    The vespa process for the analysis of seismic signals (1971)
    In:  Nature, Warszawa, Army Corps of Engineers, Woodward-Clyde Consultants, vol. 232, no. 5, pp. 8-13, pp. 1013, (ISBN: 0-12-018847-3)
    Details
    Publication Date: 1971
    Keywords: Seismic networks ; Seismic arrays ; PIC ; ves
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    BIBLIOGRAPHY SEISMOLOGY
  • 2
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    Pattern recognition techniques for the interpretation of vespagrams and beamsplit data (1971)
    MIT Lincoln Lab.
    In:  Semiannual Technical Summary Report, Lexington, Mass., MIT Lincoln Lab., vol. 10, no. rapport C 20754-9.1 (2.2), pp. 38-41
    Details
    Publication Date: 1971
    Keywords: Artificial intelligence (AI) ; Pattern recognition ; Detectors ; PIC ; ves ; Seismic networks ; Seismic arrays ; Discrimination ; Data analysis / ~ processing
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    BIBLIOGRAPHY SEISMOLOGY
  • 3
    Electronic Resource
    Electronic Resource
    The control of aldolase in Lemna minor L. in relation to nitrogen deficiency (1977)
    Springer
    Planta 137 (1977), S. 271-277 
    Details
    ISSN: 1432-2048
    Keywords: Aldolase ; Lemna ; Nitrogen deficiency
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The loss of activity of aldolase which occurs when Lemna is deprived of nitrogen is shown to be due to the accumulation of a specific inhibitor of aldolase. The inhibitor has been purified 600-fold and has the properties of a low molecular weight protein. The inhibitor is not a proteolytic enzyme and the kinetics of the interaction between aldolase and the inhibitor are reported. The possible physiolgocal significance of the inhibition of aldolase is briefly discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00388162
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    The effect of pyridoxal phosphate on the activity of aldolase from Lemna minor L. (1977)
    Springer
    Planta 137 (1977), S. 265-270 
    Details
    ISSN: 1432-2048
    Keywords: Aldolase ; Lemna ; Nitrogen starvation ; Pyridoxal phosphate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Lemna aldolase has been purified by ion-exchange and affinity chromatography. The enzyme is inhibited by pyridoxal phosphate in a manner which suggests that pyridoxal phosphate forms a non-covalent complex with the enzymes which is in equilibrium with the Schiff base covalently modified enzyme. The kinetics of the reversal of inhibition have been used to test the proposition that the fall in aldolase activity observed during periods of nitrogen starvation is due to inhibition by pyridoxal phosphate. It is concluded that the in vivo loss of aldolase activity is not due to pyridoxal phosphate and that the in vitro inhibition of glycolytic enzymes by pyridoxal phosphate is due to the reaction with lysine residues at the active sites which are necessary to bind the strongly acidic sugar phosphates.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00388161
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  • 5
    Electronic Resource
    Electronic Resource
    The effect of deuterium oxide on protein turnover in Lemna minor (1979)
    Springer
    Planta 146 (1979), S. 229-236 
    Details
    ISSN: 1432-2048
    Keywords: Density labelling ; Deuterium oxide ; Lemna ; Protein turnover
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Lemna minor fronds transferred to a sterile culture medium containing 50% (v/v) deuterium oxide (2H2O) rapidly undergo a loss of soluble protein with a corresponding increase in free amino acids. The loss of protein is due to two factors: (i) the inhibition of protein synthesis for 4 h followed by a slower rate of synthesis than normal, (ii) a rapid 9–10 fold increase in protein degradation. In plants grown for longer periods (3–6 days) in 50% 2H2O medium, protein synthesis is inhibited by 20% and the rate constant of degradation is 2–3 times that measured in fronds growing in normal (H2O containing) complete medium. The initial loss of protein is not due to the breakdown of any specific protein fraction. Investigation of several enzymes indicates that all proteins are catabolised in response to 2H2O treatment. The implications of these results with regard to the interpretation of density-labelling experiments are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00388237
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  • 6
    Electronic Resource
    Electronic Resource
    The effect of nitrogen deficiency on the growth and metabolism of Lemna minor L. (1977)
    Springer
    Planta 137 (1977), S. 259-264 
    Details
    ISSN: 1432-2048
    Keywords: Glycolysis ; Lemna ; Nitrogen deficiency ; Protein degradation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract When Lemna is deprived of nitrogen, growth and respiration decrease and the pattern of 14CO2 release from [1-14C]glucose and [6-14C]glucose is consistent with a relatively strong inhibition of glycolysis. Protein degradation is enhanced but the concentration of free amino acid decreases. It is argued that the biological significance of the increased protein degradation does not lie in its contribution to respiration but as a mechanism to replace one set of enzymes adapted to a particular environmental condition (high nitrogen) with another set of enzymes adapted for low nitrogen in the environment. The change in enzyme pattern associated with the change from high to zero nitrogen in the growth medium has been examined for nine enzymes. The changes in activity observed are consistent with the observed apparent inhibition of glycolysis during nitrogen starvation, but do not explain the inhibition of the pentose phosphate pathway.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00388160
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  • 7
    Electronic Resource
    Electronic Resource
    The mechanism of deuterium oxide-induced protein degradation in Lemna minor (1980)
    Springer
    Planta 148 (1980), S. 374-380 
    Details
    ISSN: 1432-2048
    Keywords: Deuterium oxide ; Lemna ; Protein degradation ; Stress (D2O) ; Tonoplast properties
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Transfer of Lemna minor fronds to culture medium containing 50% (v/v) deuterium oxide induces a large increase in the rate of protein breakdown, which is not due to an increase in the activity of acidic or neutral proteolytic enzymes or peptidases. Biochemical and ultrastructural evidence indicates that deuterium oxide affects the properties of certain membranes, particularly the tonoplast, and allows vacuolar proteolytic enzymes to pass into the cytoplasm and cause the increased protein breakdown.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00388126
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