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  • Canadian Science Publishing  (2)
  • Blackwell Publishing Ltd  (1)
  • Cambridge University Press  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of the American Water Resources Association 25 (1989), S. 0 
    ISSN: 1752-1688
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying , Geography
    Notes: : The conductivity of air, mineral oil (relative viscosity 77), and a light nontoxic oil (relative viscosity 4.7) was measured in three porous media: a sand, loamy sand, and a silt loam. The measurements were made over a range of water contents for each porous medium. Small volumes of air were present as well as significant amounts of water during most of the oil conductivity measurements. The results were compared to two methods for calculating conductivities of immiscible fluids in water-wet porous media. A new equation that accounts for swelling and for the gas slippage effect in very small pores was formulated for use with these methods The observed conductivities, spanning seven orders of magnitude, agree reasonably well with calculated values. Only three soil parameters are required to calculate the conductivities: (1) the saturated conductivity of water, (2) the saturated conductivity of the immiscible fluid of interest, and (3) a pore size index value that is obtained from an estimate from the water release curve of the porous material. Remediation of organic liquid spills is briefly discussed to illustrate the practical applications of gas phase conductivities, as well as those for immiscible organic liquid phases. It is concluded that, in light of spatial variation under field conditions, the method presented for calculating values of three-phase conductivities will be useful in the management of immiscible organic liquid spills and leaks.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Cambridge : Cambridge University Press
    Modern Asian studies 11 (1977), S. 127-148 
    ISSN: 0026-749X
    Source: Cambridge Journals Digital Archives
    Topics: Ethnic Sciences , History , Political Science , Economics
    Notes: At a very early stage in their respective careers, most of the major iron and steel plants of Europe and North America recognized the strategic importance of possessing colliery capacity in order to safeguard their requirements of coking-coal, a basic input to the blast furnace. In the Ruhr—where the tendency towards vertical integration probably reached its apotheosis—the Huttenzechen (tied mines), accounted for nearly twenty per cent of the total coal output at the turn of the century and no less than fifty per cent during the inter-war period. The precise legal standing of the integrated units naturally varied from country to country. In Britain and Germany, for example, the most favoured practice was for the iron and steel plant to establish outright ownership of the mines and to treat them merely as a department of the enterprise complex itself, whereas in the United States, the giant steel works such as Kaiser, Republic, and Bethlehem, preferred to create semi-autonomous subsidiary companies. In India, the two steel firms ofthe pre- Independence era, i.e. the Tata Iron and Steel Company (henceforth abbreviated to T.I.S.CO.) and the Indian Iron and Steel Company (I.I.S.CO.), inclined towards the former organizational model (with the single exception of T.I.S.CO.'s West Bokaro colliery which was purchased in 1947 and was wholly owned by the Company's shareholders).
    Type of Medium: Electronic Resource
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  • 3
    Publication Date: 1982-09-01
    Description: Height, diameter, volume growth, crown width, and stocking of lodgepole pine (Pinuscontorta Dougl.) and white spruce (Piceaglauca (Moench) Voss) were studied on the three most common forest sites in the central interior of British Columbia, to estimate their potential growth and their suitability for pure or mixed stands in managed second-growth forests established by planting. Spruce only should be planted on moist to wet Alluvium sites; both species appear to be equally suitable on moist Aralia sites, and pine only should be planted on dry to moist Cornus–Moss sites. In mixed forest, suppressed spruce will have little volume at the time of pine harvest. In general, managed, fully stocked second-growth forests should produce greater volume per hectare than the present natural, unmanaged forests.
    Print ISSN: 0045-5067
    Electronic ISSN: 1208-6037
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
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  • 4
    Publication Date: 1985-08-01
    Description: White spruce seedlings (seed source, 58°50′ N) were grown in a container nursery at Victoria, B.C. (48°28′ N) under the following two photoperiod regimes: (i) natural day length artifically extended to 18 h (120 lx from an incandescent source); (ii) natural day length with dark period interruption for 2.5 min every 30 min (120 lx from an incandescent source). Beginning on July 17, 12 weeks after sowing, batches of seedlings experienced a simulated failure of the lighting systems of from 0 to 9 nights. Although the reduced photoperiod did not fit the usual definition of a short day, failure of the lighting system in (i) and (ii) caused significant reductions in seedling shoot length and dry weight and a significant increase in root dry weight.
    Print ISSN: 0045-5067
    Electronic ISSN: 1208-6037
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
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