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  • Electronic Resource  (3)
  • 1985-1989  (3)
  • 1988  (2)
  • 1985  (1)
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  • Electronic Resource  (3)
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  • 1985-1989  (3)
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  • 1
    Electronic Resource
    Electronic Resource
    Effect of mixed function oxidase inhibitors on the toxicity of chlortoluron and isoproturon to wheat (1985)
    Oxford, UK : Blackwell Publishing Ltd
    Weed research 25 (1985), S. 0 
    Details
    ISSN: 1365-3180
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Growth responses of wheat plants to combined treatments of four mixed function oxidase (MFO) inhibitors and chlortoluron were determined. Analysis of interactions showed that piperonyl-butoxide and especially ABT (1-aminobenzotriazole) increased the toxicity of chlortoluron. Metyrapone and 2,4-dichlorophenoxypropyne were phytotoxic and did not exert any clear interaction. ABT also increased the toxicity of isoproturon to wheat.Our results suggest that ABT Strongly inhibits the breakdown of chlortoluron and isoproturon in wheat. Since ABT is known to act as a suicide substrate for plant cytochrome P-450, wheat enzymes involved in the metabolism of these two herbicides are likely to belong to this class. It thus appears that compounds designed to inhibit plant cytochrome P-450 enzymes may interact with herbicide metabolism and are potential synergists of herbicide activity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3180.1985.tb00661.x
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Forces of a fluid in a rotating straight pipe (1988)
    Springer
    Zeitschrift für angewandte Mathematik und Physik 39 (1988), S. 397-403 
    Details
    ISSN: 1420-9039
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Physics
    Notes: Abstract The fluid flow through a rotating straight pipe is considered, the axis of rotation being perpendicular to the pipe axis. The flow of the fluid is taken as fully developed, i.e. the velocity field is assumed to be the same in all transverse cross sections of the pipe. The derivation presented applies to viscous and nonviscous incompressible fluids. For constant angular pipe velocityΩ a simple and exact (Coriolis type) relationF=2Q(t)Ω is derived between the forceF by which the fluid acts on the (unit length of the) pipe in the direction perpendicular to the two axes, the fluid mass flow rateQ(t) through the pipe, and the angular velocityΩ. Variable angular velocities, i.e. $$\frac{{d\Omega }}{{dt}} = |0$$ , introduce an additional term into the expression for the inertial forceF, which depends only on $$\frac{{d\Omega }}{{dt}}$$ and on known (constant) parameters; this term is known for given angular velocityΩ(t). The flow configuration investigated here is an idealization of those appearing (over short space and time intervals) in the devices measuring mass flow rateQ(t) through the (Coriolis) forceF. Therefore the exact results derived here cast some light on the degree of precision one expects in these devices, where more complicated flow configurations are present than those looked at in this paper.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00945060
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    The behaviour of macromolecules in the flow through a sudden planar contraction (1988)
    Springer
    Rheologica acta 27 (1988), S. 117-124 
    Details
    ISSN: 1435-1528
    Keywords: FENE-Pdumbbell ; sudden planarcontraction ; flow classification ; (very) strongflow ; weakflow
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Abstract Analytic steady-state results for FENE-P model macromolecules, in the nearly coiled-up and nearly stretched state respectively, in general two-dimensional flow fields are derived. These results are utilized in the flow through a sudden planar contraction. Special emphasis is devoted to the structure tensor 〈R R〉, which furnishes, among other things, the mean square extension and the average orientation of the macromolecules.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01331895
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    Paper (German National Licenses)
    Fulltext
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