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  • 1980-1984  (2)
  • Azolla  (1)
  • Inorganic Chemistry  (1)
  • diterpenes
  • 1
    ISSN: 1573-5036
    Keywords: Available N and P ; Azolla ; Blue-green algae ; Mineralization ; Organic manures ; Rice soil
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Pot incubation study with fresh Azolla (Azolla pinnata-India and Vietnam isolates,A. mexicana andA. filiculoides), blue-green algaAulosira sp., green manureSesbania cannabina, Azolla compost, farm yard manure and ammonium sulphate was conducted under flooded condition at CRRI, Cuttack keeping an equivalent amount of 25 ppm N through all the amendments where changes in availability of N and P, C∶N ratio and pH were recorded. Application of chemical N-fertilizer recorded a release of about 87% NH4 +−N at 10th day of flooding which gradually decreased and reached the minimum of 6% at 50 days. The C∶N ratio of the organic manures ranged between 9–10 favouring release of NH4 +−N and among theAzolla speciesA. pinnata isolates released NH4 +−N more efficiently thanA. filiculoides andA. mexicana. A. pinnata Indian isolate released maximum of 88% NH4 +−N, whereas Vietnam isolate recorded 77% at 40 days of flooding; green manure on the other hand, reached a maximum of 50% release at 50 days. The blue-green alga recorded a gradual increase and attained the maximum release of 38% at 40 days of flooding. Farmyard manure recorded a highest NH4 +−N release of 69% at 20 days of flooding and gradual decrease thereafter, whereas Azolla compost released 41% at 40 days of flooding. Soil amended with fresh organic matter achieved reduction upto a pH of 7.2 after 50 days of flooding, whereas the pH in Azolla compost and farmyard manure amendment was 〈7. The P availability increased from 20th day onwards and reached the highest values of 26 and 18 ppm in the fresh organic matter and compost amended soil respectively after 40–50 days of flooding. The cumulative release of available P was found superior in fresh Azolla incorporation.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 461 (1980), S. 222-230 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Quantitative „Softness“ Parameter und ihre Anwendung in der Strukturaufklärung von Bimetalltetracyanat-Komplexen〉2M(NCS)2M′(SCN)2〈 und [Ml6][M′(SCN)4], (M = COII und NiII; M′ = ZnII, CdII und HgII, L = Anilin, p-Toluidin, Pyridin, Nicotinamid, 2,2′-Bipyridin und 4-Aminopyridin) wurden dargestellt und charackterisiert. Die Strukturen werden auf Grund von Leitfähigkeits-, magnetischen und spektroskopischen (IR und VIS) Messungen, sowie durch gruppentheoretische Berechnungen und Ligandenfeldparametern vorgeschlagen. Diese Strukturvorschläge werden gestützt durch quantitative „Softness“ - Werte „\documentclass{article}\pagestyle{empty}\begin{document}$ {\rm E}_{\rm n}^{_ + ^ +},{\rm E}_{\rm m}^{_{\rm +}^{\rm +}} $\end{document}“. Die totale „Softness“ von M und M′ und ihre Differenz \documentclass{article}\pagestyle{empty}\begin{document}$ \Delta {\rm TE}_{\rm n}^{_ + ^ +} \left({{\rm M} - {\rm M}'} \right) $\end{document} wurden abgeleitet (Gleichungen siehe Abstract) und mit der Struktur der Komplexe in Verbindung gebracht.
    Notes: 〉2M(NCS)2M′(SCN)2〈 and [ML6][M′(SCN)4], (M = Co(II) and Ni(II), M′ = Zn(II), Cd(II) and Hg(II) and L = aniline(ani), p-toluidine(tol), pyridine(py), nicotinamide(nia), 2,2′-bipyridine(bipy) and 4-aminopyridine (apy)) have been prepared and characterized. Their structure have been proposed on the basis of molar conductance, magnetic moment, group theoretical calculations, ligand field parameters, infrared and electronic spectral studies. The proposed structures have also been supported by quantitative values of softness „\documentclass{article}\pagestyle{empty}\begin{document}$ {\rm E}_{\rm n}^{_ + ^ +},{\rm E}_{\rm m}^{_{\rm +}^{\rm +}} $\end{document}“,. Total softness of M and M′ and their difference \documentclass{article}\pagestyle{empty}\begin{document}$ \Delta {\rm TE}_{\rm n}^{_ + ^ +} \left({{\rm M} - {\rm M}'} \right) $\end{document} have also been derived by the following equations and related to the structure of the complexes. \documentclass{article}\pagestyle{empty}\begin{document}$$ {\rm TE}_{\rm n}^{_ + ^ +} \left({\rm M} \right) = {\rm E}_{\rm n}^{_ + ^ +} \left({\rm M} \right) + \sum {\rm E}_{\rm m}^{_ + ^ +} \left({\rm L} \right) + \sum {\rm E}_{\rm m}^{_ + ^ +} \left({{\rm NCS}} \right) $$\end{document} \documentclass{article}\pagestyle{empty}\begin{document}$$ {\rm TE}_{\rm n}^{_ + ^ +} \left({{\rm M}}^\prime \right) = {\rm E}_{\rm n}^{_ + ^ +} \left({{\rm M}}^\prime \right) + \sum {\rm E}_{\rm m}^{_ + ^ +} \left({\rm L} \right) + \sum {\rm E}_{\rm m}^{_ + ^ +} \left({{\rm SCN}} \right) $$\end{document} \documentclass{article}\pagestyle{empty}\begin{document}$$ \Delta {\rm TE}_{\rm n}^{_ + ^ +} \left({{\rm M} - {\rm M}^\prime} \right) = \,|\,{\rm TE}_{\rm n}^{_ + ^ +} \left({\rm M} \right) - {\rm TE}_{\rm n}^{_ + ^ +} \left({{\rm M}}^\prime \right)$$\end{document}.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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