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  • Articles: DFG German National Licenses  (6)
  • 1975-1979
  • 1970-1974  (6)
  • 1974  (6)
Source
  • Articles: DFG German National Licenses  (6)
Material
Years
  • 1975-1979
  • 1970-1974  (6)
Year
  • 1
    Electronic Resource
    Electronic Resource
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 30 (1974), S. 828-830 
    ISSN: 1600-5740
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 30 (1974), S. 2806-2811 
    ISSN: 1600-5740
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 30 (1974), S. 1430-1435 
    ISSN: 1600-5740
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Monatshefte für Chemie 105 (1974), S. 1142-1147 
    ISSN: 1434-4475
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The complexation of thiolactic acid with Zn2+ and UO2 2+ has been investigated by potentiometric and conductometric titration techniques. Both the metals form 1∶1 and 1∶2 complexes in different pH ranges. Their logK stab values have been determined byCalvin andMelchior's extension ofBjerrum's method and were further refined by alternative methods at temperatures 20, 30, and 40°C. The values of overall changes in ΔG, ΔH and ΔS for complexation have also been reported.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Archives of microbiology 97 (1974), S. 69-72 
    ISSN: 1432-072X
    Keywords: Algicidal Effect ; Tolerance to Herbicides ; Blue-Green Alga ; Cylindrospermum ; Growth Effect ; 2,4-Dichlorophenoxyacetic Acid
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The effect of the herbicide 2,4-Dichlorophenoxy acetic acid generally used in agriculture was studied on the nitrogen fixing blue-green alga Cylindrospermum sp. The alga could tolerate up to 150 μg per ml in liquid culture and 100 μg per ml on agar plates without any inhibitory effect on growth and survival. The maximum tolerance was up to 800 μg per ml and higher concentrations were lethal.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1573-9104
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Description / Table of Contents: Zusammenfassung Untersucht wurde der Einfluβ der Lichtintensität auf die Oxalatsynthese und die Kationenkonzentration in Blättern, Stengeln und Wurzeln von Chenopodium amaranthicolor L. Es scheint, daβ in den Blättern die Oxalsäure aus Metaboliten synthetisiert wird, die sowohl photosynthetischen als auch nicht photosynthetischen Ursprungs sein können. Der Einfluβ des Lichtes auf die Oxalsäuresynthese in den Wurzeln weicht von dem in den Blättern und Stengeln ab. Die Kationenaufnahme scheint mit der Zunahme der Oxalsäureproduktion anzústeigen. Des weiteren wurde der Einfluβ von Superphosphat, Harnstoff, Kalkammon-Salpeter, Kaliumchlorid und Natriumchlorid auf die Oxalatbildung und die Kationenaufnahme bei Chenopodium album untersucht. Alle hier angeführten Nährstoffe, mit Ausnahme der geringsten Gabe Kalkammon-Salpeter, wirkte depressiv auf die Oxalatsynthese in den Blättern. Natrium- und Kaliumchlorid hatten den stärksten Einfluβ, wobei zwischen diesen beiden Salzen kein Unterschied bestand. Diese Ergebnisse legen den Gedanken nahe, daβ die Bodennährstoffe nur teilweise die Oxalsäureproduktion in dieser Pflanze regulieren. Auβerdem stützen sie die Annahme, daβ Chloride oder andere Anionen, sofern sie verfügbar sind, absorbiert werden und als Konkurrenten um die Kationen auftreten und sich somit auf die Oxalatsynthese hemmend auswirken.
    Notes: Abstract The effect of light intensity on the synthesis of oxalate and cation concentration in leaves, stems and roots ofC. amarànthicolor L. was investigated. It appears that oxalic acid is synthesized in leaves from metabolites of both photosynthetic and non-photosynthetic origin. In roots the effect of light on the oxalic acid synthesis was different to that of leaves and stems. Cation uptake seems to increase with increase in oxalic acid production. The influence of applications of superphosphate (single) urea, calcium ammonium nitrate, potassium chloride and salinity on the oxalate production and cation make up ofC. album L. was also studied. All the nutrients except at low levels of calcium ammonium nitrate depressed slightly the oxalate synthesis in leaves. The influence of the applications of sodium chloride and potassium chloride was more pronounced although the higher levels of both of these salts gave almost an equal yield of oxalic acid. These results suggest that the soil nutrients can only partly regulate the oxalic acid production in this plant. The findings also support the belief that chloride or the other anions, if available, are absorbed, compete for cations and depress the oxalate synthesis.
    Type of Medium: Electronic Resource
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