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  • Articles: DFG German National Licenses  (4)
  • 1985-1989  (4)
  • 1989  (4)
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  • Articles: DFG German National Licenses  (4)
Material
Years
  • 1985-1989  (4)
Year
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    Quantitative bioassays for determining residues and availability to plants of sulphonylurea herbicides (1989)
    Oxford, UK : Blackwell Publishing Ltd
    Weed research 29 (1989), S. 0 
    Details
    ISSN: 1365-3180
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: A bioassay procedure for quantitative determination of sulphonylurea herbicides is described. Turnips (Brassica rapa) were found very suitable as test plants and gave results within 10 days. Six sulphonylurea compounds were investigated for their activity in three widely differing soils. The potential availability to plants was calculated from the dose-response curves of vermiculite (non-sorptive substrate) and the corresponding ED50-values of the soils. The dose-response relationship (logistic curve) was described by a computer model by a position parameter, the slope of the curve and the minimum and maximum fresh weights of plants. The limit of quantitative detection in the range of ED30 in vermiculite was 0·06 μg 1−1 for sulfometuron and 1·03 μg 1−1 for DPX-L5300, methy12-([4-methoxy-6-methyl-1,3,5-triazin-2-yl (methyl)carbamoyl]-sulphamoyl) benzoate. Results with turnips showed that sulfometuron was the most active compound in all substrates (ED50 in vermiculite 0·12 μg 1−1) followed by chlorsulfuron, metsulfuron-methyl, triasulfuron, DPX-M6316, methyl 3-([(4-methoxy-6-methyl-1,3,5-triazin-2-yl)aminocarbamoyl]-aminosulphaphamoyl)-2-thiophenecarboxylate, and DPX-L5300 which had ED50 or 1·98 μg 1−1, The Horotiu sandy loam soil showed the highest ED50-values and the lowest plant availability for all compounds compared to the other soils. Probit and logistic evaluation methods for deriving dose-response relationships are compared and their applicability is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3180.1989.tb00852.x
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Mean flow characteristics of a turbulent plane jet with buoyancy induced curvature (1989)
    Springer
    Experiments in fluids 8 (1989), S. 77-85 
    Details
    ISSN: 1432-1114
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract An experimental investigation of heated vertical and inclined plane air jets discharged into quiescent surroundings is described. A unique feature of this data is that Pilot tube measurements were used to define the mean trajectory of the inclined jets so that subsequent hot-wire traverses could be made normal to the curved path. While the mean velocity and temperature profiles are self-similar for the range of exit conditions studied, other aspects of the mean jet development depend on the exit Reynolds and Froude numbers, or the discharge angle. It is noted that variations between this study and other published data suggest further measurements of this flow situation are needed, with particular attention to specific features of the jet apparatus and ambient surroundings, and to the exit Reynolds number.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00203068
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Preparation, characterisation, infrared and thermal properties of some adducts of bis(8-hydroxyquinolinato)dioxouranium(VI) (1989)
    Springer
    Journal of thermal analysis and calorimetry 35 (1989), S. 873-884 
    Details
    ISSN: 1572-8943
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Es wurden einige Addukte des koordinativ ungesättigten UO2(C9H6NO)2 mit 8-Hydroxyquinolin, Harnstoff, Anilin, Methanol, 1,10-Phenanthrolin, Pyridin und Wasser hergestellt und charakterisiert. Es wurden die IR-Spektren der Verbindungen aufgenommen sowie deren einzelne thermische Zersetzungseigenschaften untersucht. Liganden mit Stickstoffdonor formen mit UO2(C9H6NO)2 thermisch stabilere Addukte als Liganden mit Sauerstoffdonor.
    Abstract: Резюме Получены и охарактер изованы несколько аддуктов координаци онно ненасыщенного UO2(C9H6NO)2 с 8-оксихинолином, мочевиной, анилином, метанолом, 1,10-фенантрол ином, пиридином и водой. Изу чены ИК спектры этих с оединений и их специфическое те рмическое разложение. Установл ено, что азотсодержащ ие лиганды образуют с UO2(C9H6NO)2термич ески более устойчивые адд укты, чем кислородсод ержащие лиганды.
    Notes: Abstract Several adducts of the coordinatively unsaturated species UO2(C9H6NO)2 with 8-hydroxyquinoline, urea, aniline, methanol, 1,10-phenanthroline, pyridine and water were prepared and characterized. The infrared spectra of these compounds have been recorded and their particular thermal decomposition properties studied. Nitrogen donor ligands have been found to form adducts with UO2(C9H6NO)2 which are thermally more stable than those formed by oxygen donor ligands.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02057243
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    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Sensitive bioassays for determining residues of sulfonylurea herbicides in soil and their availability to crop plants (1989)
    Springer
    Hydrobiologia 188-189 (1989), S. 367-375 
    Details
    ISSN: 1573-5117
    Keywords: herbicides ; bioassays ; phytotoxicity ; persistence ; herbicide residues ; biological activity ; soil residual activity ; sulfonylurea herbicides
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Sulfonylurea herbicides are potent inhibitors of plant growth and are extremely active against a wide spectrum of weeds. They are used at very low rates (10–50 g ai/ha) and cause rapid inhibition of root and shoot growth of young plants. Routine chemical assays for detecting low levels of these compounds are difficult and there is need to develop sensitive bioassay methods for detecting their extremely low residue levels in the soil. This paper describes a simple pot bioassay method with a self watering system using turnip (Brassica rapa) seedlings as test plants for quantitative determination of sulfonylurea herbicides. Results are presented with six of these compounds whose activity was investigated in widely differing substrates. The potential availability to plants was calculated from the dose-response curves in different substrates. The dose-response relationship has been described by a specifically developed computer model. Details are also given of a direct seeded bioassay method with controlled watering system using several test species for detection of sulfonylurea herbicides. The potential uses and practical applications of both techniques are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00027802
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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