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  • Artikel: DFG Deutsche Nationallizenzen  (4)
  • 1980-1984  (4)
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  • Artikel: DFG Deutsche Nationallizenzen  (4)
Materialart
Erscheinungszeitraum
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Schlagwörter
  • 1
    Digitale Medien
    Digitale Medien
    Studies on extraction of iron(III) and cobalt(II) chlorides by quaternary ammonium halides (1984)
    Springer
    Transition metal chemistry 9 (1984), S. 199-202 
    Details
    ISSN: 1572-901X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Summary The extraction of iron(III) and cobalt(II) from hydrochloric acid solutions by Hyamine 1622, a quaternary ammonium halide, in dichloroethane is described. The effect of acidity, salting-out agent, metal and extradant concentrations and temperature, has been investigated. The extraction mechanism is discussed in the light of results obtained. Separation of iron(III) and cobalt(II) is also outlined.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00618617
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Allelopathic effects ofPolygonum aviculare L. II. Isolation, characterization, and biological activities of phytotoxins (1982)
    Springer
    Journal of chemical ecology 8 (1982), S. 1011-1023 
    Details
    ISSN: 1573-1561
    Schlagwort(e): Allelopathy ; inhibitors ; phenols ; glycosides ; Chenopodium album ; Rhizobium ; Azotobacter ; Cynodon dactylon
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Chemie und Pharmazie
    Notizen: Abstract In earlier work, we found thatPolygonum aviculare had pronounced allelopathic effects against several test species. Four inhibitors were isolated from livingPolygonum plants, three of which were glucosides. Four different inhibitors were isolated fromPolygonum residues and soil underPolygonum stands, and none of these occurred in soil fromCynodon dactylon (L.) Pers. stands. Three of these were glycosides containing both fructose and cellobiose as the sugars. Color reactions of all the inhibitors indicated that they are phenolic in nature. All the inhibitors reduced seed germination and/or seedling growth ofChenopodium album L. Moreover some of them inhibited growth of different strains ofRhizobium andAzotobacter.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00987882
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Allelopathic effects ofPolygonum aviculare L. I. Vegetational patterning (1982)
    Springer
    Journal of chemical ecology 8 (1982), S. 993-1009 
    Details
    ISSN: 1573-1561
    Schlagwort(e): Allelopathy ; interference ; patterning ; biological control ; Polygonum ; Cynodon ; Chenopodium ; Sorghum ; Gossypium
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Chemie und Pharmazie
    Notizen: Abstract Polygonum aviculare was observed to spread rapidly into heavy stands ofCynodon dactylon (L.) Pers. resulting in death of the latter. This indicated a strong interference againstCynodon dactylon. Measurements of selected soil minerals and physical factors indicated that competition was probably not the chief cause of that interference. Soil collected under deadPolygonum was very inhibitory to all test species exceptSporobolus pyramidatus (Lam.) Hitchc., suggesting the presence of inhibitory compounds. Tops and roots ofPolygonum, root exudates, and leachate of the tops inhibited seed germination and seedling growth of most test species. Therefore, allelopathy apeared to be the dominant component of the interference, with competition probably accentuating its effects.Polygonum aviculare was inhibitory toGossypium barbadense L. andSorghum bicolor (L.) Moench, indicating that allelopathy is an important component of the interference byPolygonum against crop yields.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00987881
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  • 4
    Digitale Medien
    Digitale Medien
    Allelopathic effects ofPolygonum aviculare L. (1983)
    Springer
    Journal of chemical ecology 9 (1983), S. 761-774 
    Details
    ISSN: 1573-1561
    Schlagwort(e): Allelopathy ; fatty acids ; GC-MS ; Polygonum aviculare ; Cynodon dactylon ; Rhizobium ; Azotobacter
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Chemie und Pharmazie
    Notizen: Abstract We previously reported thatPolygonum aviculare has a strong allelopathic action againstCynodon dactylon (L.) Pers. and other test species. Moreover, we found that several phenolic compounds appeared to be important allelochemics in this activity. We have now isolated other potential inhibitors fromP. aviculare residues and soil underPolygonum stands, and none of these occurred in soil underC. dactylon stands. GC-MS analysis revealed that these additional inhibitors are long-chain fatty acids with 14–22 carbons. Nine were identified inP. aviculare residues and seven in soil underP. aviculare. Sodium salts of all the identified fatty acids inhibited seedling growth ofC. dactylon and at least some test strains of the nitrogen-fixing bacteria,Azotobacter andRhizobium.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00988781
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