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  • 1985-1989  (2)
  • 1988  (2)
  • entropy  (1)
  • α-Amylase  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Monensin inhibits the secretion of α-amylase but not polysaccharide slime from seedling tissues ofZea mays (1988)
    Springer
    Protoplasma 142 (1988), S. 36-45 
    Details
    ISSN: 1615-6102
    Keywords: α-Amylase ; Corn (Zea mays) seedlings ; Growth ; Monensin ; Polysaccharide slime ; Secretion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The effect of monensin on polysaccharide slime secretion by root tips of corn (Zea mays) was studied. Various treatment times and ionophore concentrations were tested: none resulted in inhibition of slime secretion. Because monensin changes the pH of the medium, its effect was also monitored in strongly buffered media and at different pH's. Even in such media, monensin did not inhibit slime secretion. We also measured the effect of the drug after a pulse with [3H]fucose or a pulse followed by a chase. The amount of labeled slimed secreted was not altered by the ionophore. However, 10μM monensin affected the development of root tips and drastically reduced their growth. We showed that monensin inhibits the secretion of α-amylase by the scutellum of the same plantlet. The importance of the nature of the secretory compound in relation to monensin inhibition of its secretion is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01273224
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Effect of solids concentration in dense suspensions of silica-iron(III) oxide and water (1988)
    Springer
    Rheologica acta 27 (1988), S. 197-201 
    Details
    ISSN: 1435-1528
    Keywords: Densesuspension ; power-lawflow ; entropy ; iron oxide
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Abstract The rheological properties of dense suspensions, of silica, iron (III) oxide and water, were studied over a range of solids concentrations using a viscometer, which was modified so as to prevent settling of the solid components. Over the conditions studied, the material behaved according to power—law flow relationships. As the concentrations of silica and iron(III) oxide were increased, an entropy term in the flow equation was identified which had a silica dependent and an iron (III) oxide dependent component. This was attributed to a tendency to order into some form of structural regularity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01331905
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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