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  • Zeolite  (1)
  • precipitation  (1)
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  • 1
    Digitale Medien
    Digitale Medien
    Kurzmitteilung/Short Communication Mikrowellen-induzierte Reaktionen organischer Substrate im Hohlraum von Zeolithen (1990)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 123 (1990), S. 1591-1594 
    Details
    ISSN: 0009-2940
    Schlagwort(e): Zeolite ; Microwave irradiation ; Claisen rearrangement ; Dehydrogenation ; Dehydration ; Chemistry ; Inorganic Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: Microwave-Induced Reactions of Organic Substrates in the Cage of ZeolitesMicrowave irradiation of compounds 1, 7, 15, 19, 23, and 24adsorbed on Y zeolites has been studied. The reaction rate of the corresponding rearrangement, dehydrogenation and dehydration is dramatically enhanced as compared with reactions under thermal conditions.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/cber.19901230723
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
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    Mesoscale marine tropical precipitation varies independently from the spatial arrangement of its convective cells (2021)
    Details
    Publikationsdatum: 2021-07-25
    Beschreibung: The relationship between mesoscale convective organization, quantified by the spatial arrangement of convection, and oceanic precipitation in the tropical belt is examined using the output of a global storm-resolving simulation. The analysis uses a 2D watershed segmentation algorithm based on local precipitation maxima to isolate individual precipitation cells and derive their properties. 10° by 10° scenes are analyzed using a phase-space representation made of the number of cells per scene and the mean area of the cells per scene to understand the controls on the spatial arrangement of convection and its precipitation. The presence of few and large cells in a scene indicates the presence of a more clustered distribution of cells, whereas many small cells in a scene tend to be randomly distributed. In general, the degree of clustering of a scene (Iorg) is positively correlated to the mean area of the cells and negatively correlated to the number of cells. Strikingly, the degree of clustering, whether the cells are randomly distributed or closely spaced, to a first order does not matter for the precipitation amounts produced. Scenes of similar precipitation amounts appear as hyperbolae in our phase-space representation, hyperbolae that follow the contours of the precipitating area fraction. Finally, including the scene-averaged water vapour path (WVP) in our phase-space analysis reveals that scenes with larger WVP contain more cells than drier scenes, whereas the mean area of the cells only weakly varies with WVP. Dry scenes can contain both small and large cells, but they can contain only few cells of each category.
    Schlagwort(e): 551.5 ; convection ; object-based approaches ; organization ; precipitation ; storm-resolving modelling
    Sprache: Englisch
    Materialart: article
    Standort Signatur Erwartet Verfügbarkeit
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    CITATION GEO-LEO
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