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  • 1
    Digitale Medien
    Digitale Medien
    Springer
    Hydrobiologia 49 (1976), S. 59-63 
    ISSN: 1573-5117
    Schlagwort(e): Streams ; Nitrogen ; Nutrients ; Denitrification
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract Nitrogen transport in a 2 km-long, spring-fed stream was studied during the summer months by analyzing weekly water samples from four stations. The water at the spring had a consistently high level of nitrate-N ranging from about 7 mg/l in late spring to about 3 mg/l in early fall. However, over the length of the stream, 60% (about 97 kg) of the incoming nitrate-N is lost from the water during the summer period. The loss, which does not appear to be attributable to the uptake by aquatic macrophytes or to immobilization, is thought to result from denitrification.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    Publikationsdatum: 2016-06-07
    Beschreibung: For qualitative analysis of atmospheric particulates by microscopy, the sampling device should preserve the particles in the state existing at the moment of capture. A collector is described that uses electrostatic precipitation to capture and disperse specimens on various substrates for direct insertion into microscopes. Sampling runs in various atmospheres are described. Micrographs are presented to show particle morphology and distribution on the substrates. Chemical identification by X-ray energy probe and electron diffraction is illustrated.
    Schlagwort(e): ENVIRONMENT POLLUTION
    Materialart: NASA. Goddard Space Flight Center Ninth Conf. on Space Simulation; p 267-275
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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