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  • 1
    Electronic Resource
    Electronic Resource
    Unidentified Airborne Organism (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 715-716 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The particles appear to be hollow, probably spherical skeletons with a hexagonal structure and possibly some internal structures (Figs. 1 and 2). They are of remarkably constant size 0-4-0-5 microns in diameter, and the material of which they are composed does not diffract electrons and is ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/224715a0
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Alpha Track Autoradiography of Sub-micron Aerosol Particles with the Electron Microscope (1968)
    [s.l.] : Nature Publishing Group
    Nature 219 (1968), S. 1245-1248 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Monolayers of nuclear emulsion grains have been used for low energy beta autoradiography in biological work2'3. Beta emitters of different energies can be separately identified by applying compound layers of emulsion and absorber4. These applications are essentially single grain autoradiography. ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/2191245a0
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  • 3
    Electronic Resource
    Electronic Resource
    Chromium Trioxide Aerosol from Heated 80:20 Nickel–Chromium Wire (1966)
    [s.l.] : Nature Publishing Group
    Nature 210 (1966), S. 475-477 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] WHEN wires are heated to temperatures of about 1,000 C they give off a considerable number of very small particles. In laboratory experiments on the behaviour of sub-micron particles it is often convenient to produce the test aerosol by passing air over an electrically heated wire of such metal as ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/210475a0
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Sampling of Sub-micron Particles for Electron Microscopy (1961)
    [s.l.] : Nature Publishing Group
    Nature 189 (1961), S. 336-336 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Fig. 1. Autoradiograph of thermal precipitator sample of Aitken nuclei, labelled with thorium B, collected on carbon-coated electron microscope grid. (x 175) Fig. 2. Autoradiograph of simultaneous sample collected on carbon-coated coverslip. (x 175) The technique finally used to test the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/189336a0
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  • 5
    Electronic Resource
    Electronic Resource
    Role of condensation nuclei as carriers of radioactive particles (1957)
    Springer
    Pure and applied geophysics 36 (1957), S. 233-242 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary The effect on the deposition of thoron and radon decay products of attachment to condensation nuclei is described. Methods are suggested of using these decay products as markers for condensation nuclei and comparison is made between radioactive and non radioactive determinations of the diffusion coefficients of marked nuclei. The spontaneous production of condensation nuclei by irradiation of clean air by alpha and beta particles and by X-rays is described.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01993011
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  • 6
    Electronic Resource
    Electronic Resource
    Some observations on the behaviour of radioiodine vapour in the atmosphere (1959)
    Springer
    Pure and applied geophysics 42 (1959), S. 42-48 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary The diffusion of gaseous radioiodine vapour to surfaces is controlled by boundary layer effects, and diffusion to the walls of a tube is in good agreement with theory. In the presence of condensation nuclei the behaviour of the radioiodine depends on the amount of iodine carrier present. With no carrier the radioiodine appears to undergo adsorption on the nuclei.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02113386
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  • 7
    Electronic Resource
    Electronic Resource
    The generation of condensation nuclei by ionising radiation (1961)
    Springer
    Pure and applied geophysics 50 (1961), S. 118-128 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary The production of condensation nuclei by the irradiation of filtered nuclei-free air by X-rays, alpha particles and beta particles is described. It is found that nuclei are created in large numbers by such irradiation and that there appears to be a threshold radiation dose at which the nucleus concentration is increased by a factor of more than a hundred. The effect of varying sulphur dioxide content of the irradiated air has been investigated and for concentrations of between one and ten milligrams per cubic metre of air there is some proportionality between the sulphur dioxide content of the air and the nucleus concentration produced by a given radiation dose. It is shown, however, that sulphur dioxide cannot be exclusively responsible for the generation of condensation nuclei by irradiation of filtered air and other possible agents and mechanisms are suggested.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02000635
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