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  • Chemistry  (10)
  • sesquiterpenes  (6)
  • Azolla  (3)
  • N2-fixation  (3)
  • 1
    Digitale Medien
    Digitale Medien
    Isocedrene derivatives and other sesquiterpenes from moscharia pinnatifida
    Amsterdam : Elsevier
    Phytochemistry 24 (1985), S. 1525-1529 
    Details
    ISSN: 0031-9422
    Schlagwort(e): Compositae ; Moscharia pinnatifida ; cyperenes nerolidol derivatives. ; guaianes ; isocedrenes ; sesquiterpenes
    Quelle: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Thema: Biologie , Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://linkinghub.elsevier.com/retrieve/pii/S0031-9422(00)81059-6
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  • 2
    Digitale Medien
    Digitale Medien
    Epi-Ililic acid from Alcantara Ekmaniana
    Amsterdam : Elsevier
    Phytochemistry 21 (1982), S. 456-457 
    Details
    ISSN: 0031-9422
    Schlagwort(e): Alcantara ekmaniana ; Compositae ; Vernonieae ; epi-ilicic acid. ; sesquiterpenes
    Quelle: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Thema: Biologie , Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://linkinghub.elsevier.com/retrieve/pii/S0031-9422(00)95289-0
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  • 3
    Digitale Medien
    Digitale Medien
    A guaian-5,12-olide from Hypochoeris cretensis
    Amsterdam : Elsevier
    Phytochemistry 21 (1982), S. 2119-2120 
    Details
    ISSN: 0031-9422
    Schlagwort(e): 5, 12-lactone. ; Compositae ; Hypochoeris cretensis ; guaianolide ; sesquiterpenes
    Quelle: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Thema: Biologie , Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://linkinghub.elsevier.com/retrieve/pii/0031-9422(82)83060-4
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  • 4
    Digitale Medien
    Digitale Medien
    Sesquiterpenes and a dimeric spiroketone from Cineraria fruticulorum
    Amsterdam : Elsevier
    Phytochemistry 21 (1982), S. 2531-2535 
    Details
    ISSN: 0031-9422
    Schlagwort(e): C. parvifolia ; Cineraria fruticulorum ; Compositae ; cinalbicol derivatives ; dimeric spiroketone ; hydroxymyrtenol. ; new carbon skeleton ; sesquiterpenes ; spathulenol derivatives ; γ-humulene derivatives
    Quelle: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Thema: Biologie , Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://linkinghub.elsevier.com/retrieve/pii/0031-9422(82)85251-5
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  • 5
    Digitale Medien
    Digitale Medien
    Three cadinene derivatives and a prostaglandin-like acid from Chromolaena species
    Amsterdam : Elsevier
    Phytochemistry 21 (1982), S. 371-374 
    Details
    ISSN: 0031-9422
    Schlagwort(e): C. pseudoinsignis ; Chromolaena chasleae ; Compositae ; Eupatorieae ; cadinene derivatives ; prostaglandin-like acid. ; sesquiterpenes
    Quelle: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Thema: Biologie , Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://linkinghub.elsevier.com/retrieve/pii/S0031-9422(00)95269-5
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  • 6
    Digitale Medien
    Digitale Medien
    Eremophilane derivatives and other constituents from Senecio species
    Amsterdam : Elsevier
    Phytochemistry 24 (1985), S. 1249-1261 
    Details
    ISSN: 0031-9422
    Schlagwort(e): Compositae ; Senecio species ; bisabolene derivatives ; cacalol derivatives ; cumol derivatives. ; eremophilanes ; sesquiterpenes ; shikimic acid ester
    Quelle: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Thema: Biologie , Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://linkinghub.elsevier.com/retrieve/pii/S0031-9422(00)81111-5
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  • 7
    Digitale Medien
    Digitale Medien
    Nitrogen fixation and balance studies of rice soil (1987)
    Springer
    Biology and fertility of soils 4 (1987), S. 15-19 
    Details
    ISSN: 1432-0789
    Schlagwort(e): Nitrogen fixation ; N-balance studies ; Azolla ; Blue-green algae ; Chemical N fertilization ; Rice
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Geologie und Paläontologie , Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Summary A nitrogen balance study conducted in ceramic pots under net house conditions for four seasons showed that flooded rice soil leaves a positive nitrogen balance (N increase) in soil after rice cropping in both fertilized and unfertilized soil. Recovery of nitrogen from rice soil was more than its input in unfertilized soil, but it was reverse in fertilized soil. Incorporation of Azolla or BGA twice as basal and 20 days after transplanting (DAT) alone or in combination showed higher nitrogen balance and N2-fixation (N gain) in soil than in that where it was applied once either as basal or 20 DAT. Planted soil showed more N2-fixation than that of fallow rice, and flooded soil fixed more nitrogen in comparison to non-flooded soil in light but less in dark. Soil exposed to light fixed more nitrogen than that of unexposed soil in both flooded and non-flooded conditions.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00280345
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  • 8
    Digitale Medien
    Digitale Medien
    Growth and acetylene reduction activity ofAzolla caroliniana Willd. as influenced by split applications of urea fertilizer and their response on rice yield (1988)
    Springer
    Nutrient cycling in agroecosystems 18 (1988), S. 189-199 
    Details
    ISSN: 1573-0867
    Schlagwort(e): Azolla caroliniana ; N2-fixation ; rice yield ; crop N uptake
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Abstract Experiment with different split applications of 40 kg N ha−1 of urea (U) at transplanting:30 days after transplanting:40 days before crop maturity with different proportions of 50:25:25, 25:50:25 and 0:50:50 splits, with and without Azolla, carried out for two consecutive seasons, revealed that fresh weight (FW), N2-fixation measured by acetylene reduction activity (ARA) and N yield of newly introducedAzolla caroliniana were higher with 0:50:50 treatment followed by 25:50:25 and 50:25:25.Azolla was unincorporated and left for self decomposition. The crop yield (grain yield, straw yield) and crop N uptake data indicated that among the no Azolla treatments, the use of 50:25:25 split resulted in highest crop yield and crop N uptake followed by 25:50:25 and 0:50:50 treatments, while these parameters recorded maximum value with 25:50:25 split in combination with Azolla followed by 50:25:25 and 0:50:50 treatments. The use of Azolla increased crop yield and crop N uptake significantly over no Azolla treatments.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01049513
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  • 9
    Digitale Medien
    Digitale Medien
    Influence of Azolla management on the growth, yield of rice and soil fertility (1987)
    Springer
    Plant and soil 102 (1987), S. 41-47 
    Details
    ISSN: 1573-5036
    Schlagwort(e): Azolla pinnata ; dual cropping ; N2-fixation ; spacing ; rice yield
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Abstract A field experiment conducted at Central Rice Research Institute, Cuttack, during three successive seasons showed that with the 120-day-duration variety Ratna two dual crops ofAzolla pinnata R. Brown (Bangkok isolate) could be achieved 25 and 50 days after transplanting (DAT) by inoculating 2.0 t ha−1 of fresh Azolla 10 and 30 DAT respectively. One basal crop of Azolla could also be grown using the same inoculum 20 days before transplanting (DBT) in fallow rice fields. The three crops of Azolla grown—once before transplanting and twice after transplanting—gave an average total biomass of 38–63 and 43–64 t ha−1 fresh Azolla containing 64–90 and 76–94 kg N ha−1 respectively in the square and rectangular spacings. Two crops of Azolla grown only as a dual crop, on the other hand, gave 26–39 and 29–41 t ha−1 fresh Azolla which contained 44–61 and 43–59 kg N ha−1 respectively. Growth and yield of rice were significantly higher in Azolla basal plus Azolla dual twice incorporated treatments than in the Azolla dual twice incorporation, Azolla basal plus 30 kg N ha−1 urea and 60 kg N ha−1 urea treatments. Azolla basal plus 30 kg N ha−1 urea and 60 kg N ha−1 urea showed similar yields but Azolla dual twice incorporation was significantly lower than those. The different spacing with same plant populations did not affect growth and yield significantly, whereas Azolla growth during dual cropping was 8.3 and 64% more in the rectangular spacing than in the square spacing in Azolla basal plus Azolla dual twice incorporation and Azolla dual twice incorporation treatments.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02370898
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  • 10
    Digitale Medien
    Digitale Medien
    Symbiotic algal nitrogenase activity and heterocyst frequency in sevenAzolla species after phosphorus fertilization (1988)
    Springer
    Hydrobiologia 169 (1988), S. 313-318 
    Details
    ISSN: 1573-5117
    Schlagwort(e): Azolla ; symbiont ; Anabaena azollae ; heterocyst ; acetylene reducing activity ; phosphorus ; fertilization
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract Seven species ofAzolla (A. caroliniana, A. microphylla, A. nilotica, A. filiculoides, A. mexicana, A. rubra, A. pinnata the last from both Malaysia and India) grown in pots of flooded soil were subjected to three different treatments with respect to P: none, single application, split application. The experiments were carried out under greenhouse conditions. Heterocyst frequency inAnabaena azollae and acetylene reducing activity (ARA) were studied in successiveAzolla leaves. Both variables increased from the first leaf (shoot apex) to the last one (before branch) in all species in the presence or absence of P. However, heterocyst frequency, ARA andAzolla biomass were all less in the treatment lacking P. Heterocyst frequency inA. azollae, ARA and biomass ofAzolla were higher when P was applied in split doses than in the other treatments.Azolla plants exhibited more ARA than the isolated leaves.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00007554
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