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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Ground water 42 (2004), S. 0 
    ISSN: 1745-6584
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Geosciences
    Notes: Surface geophysical surveys provide an effective way to image the subsurface and the ground water zone without a large number of observation wells. DC resistivity sounding generally identifies the subsurface formations—the aquifer zone as well as the formations saturated with saline/brackish water. However, the method has serious ambiguities in distinguishing the geological formations of similar resistivities such as saline sand and saline clay, or water quality such as fresh or saline, in a low resistivity formation. In order to minimize the ambiguity and ascertain the efficacy of data integration techniques in ground water and saline contamination studies, a combined geophysical survey and periodic chemical analysis of ground water were carried out employing DC resistivity profiling, resistivity sounding, and shallow seismic refraction methods. By constraining resistivity interpretation with inputs from seismic refraction and chemical analysis, the data integration study proved to be a powerful method for identification of the subsurface formations, ground water zones, the subsurface saline/brackish water zones, and the probable mode and cause of saline water intrusion in an inland aquifer. A case study presented here illustrates these principles. Resistivity sounding alone had earlier failed to identify the different formations in the saline environment. Data integration and resistivity interpretation constrained by water quality analysis led to a new concept of minimum resistivity for ground water-bearing zones, which is the optimum value of resistivity of a subsurface formation in an area below which ground water contained in it is saline/brackish and unsuitable for drinking.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    International Journal of Radiation Applications & Instrumentation. Part 41 (1990), S. 143-150 
    ISSN: 0883-2889
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 9 (1999), S. 539-542 
    ISSN: 1434-6079
    Keywords: PACS: 61.46.+w Clusters, nanoparticles, and nanocrystalline materials – 61.16.Bg Transmission, reflection and scanning electron microscopy – 61.66.Dk Alloys
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract. The morphologies of Au–Fe alloy nanoparticles with an 11% Fe mean atomic concentration were investigated by means of high-resolution electron microscopy. The icosahedral morphology was very frequently found in the particles that were generated by the vapor condensation method with helium and deposited on an amorphous carbon film. A high fraction of the icosahedral morphology still remained even after the supported particles were annealed at 723 K for 1 h in a vacuum; this suggests the minimum-energy structure for the alloy particles is icosahedral. As for the low production rate of the icosahedral morphology in the pure Au particles produced under the same conditions, the present results indicate that the icosahedral form is stabilized by the addition of Fe atoms into the Au particles.
    Type of Medium: Electronic Resource
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