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  • 1
    Electronic Resource
    Electronic Resource
    Simultaneous Radar and Refractometer Soundings of the Troposphere (1963)
    [s.l.] : Nature Publishing Group
    Nature 197 (1963), S. 35-36 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] IN research on tropospheric wave propagation, the explanation of the transmission of very-high-frequency signals to points well beyond the horizon has been a subject of considerable interest for many years. Several workers1*2 have suggested that, in the absence of super-refraction, the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/197035a0
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  • 2
    Electronic Resource
    Electronic Resource
    A Film Radiometer for Centimetre Wave-lengths (1956)
    [s.l.] : Nature Publishing Group
    Nature 177 (1956), S. 392-392 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Very few direct measurements of power at centimetre wave-lengths using resistive films appear to have been made, and the only published information of which I am aware relates to extended films placed along the axis of a waveguide1*2. It has been known for some time, however, that a thin ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/177392a0
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  • 3
    Electronic Resource
    Electronic Resource
    Standardization of Strong Electromagnetic Fields (1961)
    [s.l.] : Nature Publishing Group
    Nature 189 (1961), S. 49-50 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In principle, standard flux densities of the specified value (1-20 mW./sq.cm.) can be established by radiating a known power from a transmitter under conditions which permit the calculation of the field strength or flux density at the receiver. This method is a convenient one, for example, at ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/189049a0
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  • 4
    Electronic Resource
    Electronic Resource
    Simultaneous Lidar and Refractometer Soundings of Layer Structure in the Troposphere (1969)
    [s.l.] : Nature Publishing Group
    Nature 222 (1969), S. 464-466 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The lidar was of the solid-state neodymium type operating at a wavelength of 1-06 microns with a pulse-width of 35 ns, a pulse energy of 100 mJ, and a repetition rate of about 90 pulses per min. The beam divergence was slightly less than 1 mrad. The receiver included a reflecting mirror 30 cm in ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/222464a0
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  • 5
    Electronic Resource
    Electronic Resource
    An in-vitro growth system for studying the parasitism of cowpea (Vigna unguiculata) by Striga gesnerioides (1991)
    Oxford, UK : Blackwell Publishing Ltd
    Weed research 31 (1991), S. 0 
    Details
    ISSN: 1365-3180
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: An in-vitro growth system for investigating the behaviour of S. gesnerioides on cowpea has been developed. The roots of young cowpea plants were spread over glass fibre filter paper in a shallow plastic tray, and a known number of germinated Striga seeds were placed on the cowpea root surface. This allowed the infection process of the parasite to be quantified. Good access to the host-parasite association enabled the entire infection process to be easily monitored and tissue removed for cytological studies. Observations revealed for the first time that contact of S. gesnerioides radicles with host roots stimulated the development of radicular hairs and swelling of the tip of these radicles. Furthermore, penetration of cowpea roots by Striga was shown to be localized and to cause very little damage to the host roots. Swollen parasite tubercles developed on the surface of the roots only after the host stele had been penetrated by invading Striga cells. This growth system is suitable for in-vestigating the mechanisms of host resistance. and also for rapidly screening cowpea germplasm for new sources of resistance to the Parasite. Resistant cowpea cultivars offer the best potential solution for control of this Parasite.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3180.1991.tb01760.x
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  • 6
    Electronic Resource
    Electronic Resource
    Production of Np237 and Pu238 in Thermal Power Reactors (1964)
    s.l. : American Chemical Society
    Industrial and engineering chemistry 3 (1964), S. 293-296 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/i260012a002
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  • 7
    Electronic Resource
    Electronic Resource
    Economics of Nuclear Power (1959)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Nuclear and Particle Science 9 (1959), S. 473-492 
    Details
    ISSN: 0066-4243
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.ns.09.120159.002353
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  • 8
    Electronic Resource
    Electronic Resource
    Economics of Nuclear Power (1966)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Nuclear and Particle Science 16 (1966), S. 345-378 
    Details
    ISSN: 0066-4243
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.ns.16.120166.002021
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  • 9
    Electronic Resource
    Electronic Resource
    Absorption of 12·5-mm. Wave-length Electromagnetic Radiation in Supercooled Water (1949)
    [s.l.] : Nature Publishing Group
    Nature 163 (1949), S. 871-872 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] WE have recently succeeded in measuring the absorption of radio waves of wave-length 12·5 mm. in transmission through water in the supercooled state in layers of varying thickness up to several millimetres : the lowest water temperature so far reached in this work is — 7° C. The complex ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/163871b0
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  • 10
    Electronic Resource
    Electronic Resource
    Small-Scale Irregularities of the Radio Refractive Index of the Troposphere (1964)
    [s.l.] : Nature Publishing Group
    Nature 204 (1964), S. 438-440 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] IN research on wave propagation through the troposphere at very high frequencies it is important to know the magnitude of the differences in refractive index which can occur over distances of a few centimetres or a few metres. This information is required both in investigations of propagation to ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/204438a0
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