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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Water and environment journal 17 (2003), S. 0 
    ISSN: 1747-6593
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: River corridors in urban environments provide areas of biodiversity which are important for both aesthetic and economic reasons. A physical habitat model, which was used to assess urban rivers in Birmingham, UK, was applied to pairs of selected reaches to represent differing levels of habitat diversity on three rivers. The results for different life-stages of dace, roach and chub suggest that the worst physical habitat occurs in highly modified channels and at the highest flows. Four scenarios, which were designed to represent alterations in flow regime caused by changes in management practices, were calculated using the hydrological model. Changes in physical habitat created by changes to the flow regime were assessed using a consistent, replicable method. It was shown that an increase in runoff would have detrimental effects in all cases, and that less engineered sites would benefit more from flow reductions. The lack of a suitable habitat for fry is shown to be a limiting factor for fish at all sites.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 196 (1962), S. 489-490 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] After the Windscale accident a considerable number of samples of milk, grass and soil were taken from the surrounding district and analysed by y-spectro-metry for iodine-131. Some of these samples, and others taken later, were afterwards analysed for some of the longer-lived activities, especially ...
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 183 (1959), S. 921-924 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE presence in human beings of traces of caesium -137 derived from the world-wide fall-out of fission products from nuclear weapon tests was first reported by Miller and Marinelli1 in 1956, and was also observed in human subjects in Britain by Rundo2. The main source of caesium-137 in humans is ...
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 0920-3796
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Physics
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 217 (1968), S. 642-643 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] There are now techniques for the preparation of mono-disperse aerosols of polystyrene particles, labelled with radio-nuclides, and suitable for inhalation by volunteers3. This has made it possible to study the plutonium calibration problem in vivo., using radio-nuclides which decay by orbital ...
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 206 (1965), S. 654-658 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] ASTROPHYSICAL developments in space research have tended to be slower than geophysical developments, largely because of the more sophisticated requirements of the former which need, for their full application, a stabilized platform in space. Such platforms have so far been developed mainly in the ...
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 215 (1967), S. 30-33 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] An apparatus is described which will provide a continuous and regular aerosol of 5µ particles of polystyrene labelled with chromium-51. The elimination of the radioactively labelled particles from the lungs after a single inhalation by human beings is followed by external gamma-ray ...
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Zeitschrift für angewandte Mathematik und Physik 14 (1963), S. 410-419 
    ISSN: 1420-9039
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Physics
    Notes: Zusammenfassung Eingehende Untersuchungen über den Lebenszyklus von durch Regenschauer erzeugten Radarechos und Beobachtungen von Luftbewegungen mittels radarverfolgten Ballons geben Einsicht in einen der physikalischen Kontrollmechanismen, die der Verteilung des sommerlichen Niederschlags in den Zentralappalachen unterliegen. Beobachtungen, die sich über drei Jahre hinweg erstrecken, werden benützt, um zu erklären, wie die durch das Gelände verursachten Wellenbewegungen bevorzugte Gebiete der Schauerauflösung hervorrufen können. Als Beispiel zeigt der besonders trockene Sommer des Jahres 1962, wie grossräumige Luftströmungen, die Mangel an Niederschlag verursachen, im allgemeinen gut ausgebildete stehende Wellen an den Bergen dieser Gegend hervorrufen, und wie dies sich daraufhin auswirkt, die normalen, kleinräumigen Variationen der Niederschlagsverteilung zu vergrössern. Berechnungen ergeben, dass die durch Ausfrieren unterkühlter Teile einer Kumuluswolke freiwerdende Wärme einen positiven Auftrieb verursachen kann, der von derselben Grössenordnung ist wie der im abwärtsgerichteten Teil der Wellenbewegung induzierte negative Auftrieb. Hieraus lässt sich schliessen, dass Wolkenimpfungen dazu dienen könnten, die frühzeitige Schauerauflösung in solchen Wolkensystemen und damit die in Gebieten mit häufiger Bergwellenbildung vorkommende Trockenheit zu verhindern. Natürlich kann dies nicht durch routinemässige Betätigung von Impfstoffquellen vom Boden oder Flugzeug aus geschehen; Voraussetzungen dazu sind Beobachtungen der Wolkensysteme in allen Einzelheiten und Auslösung des Impfmaterials in grossen Mengen zu genau vorbestimmter Zeit und an der richtigen Wolkenstelle.
    Type of Medium: Electronic Resource
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