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  • 1
    Electronic Resource
    Electronic Resource
    The Use of Software for a Risk-Based Approach to the Planning and Operation of Water-Resource Systems (1999)
    Oxford, UK : Blackwell Publishing Ltd
    Water and environment journal 13 (1999), S. 0 
    Details
    ISSN: 1747-6593
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Software for water-resources planning has been in use in the Anglian region of the UK since the mid-1970s. However, new technical solutions (such as network flow programming) have recently emerged and may offer more appropriate tools to respond to the growing challenges faced by the water industry. These have been explored and implemented by Essex and Suffolk Water and the Environment Agency through the ‘drought reliable output program’(DROP) project. The needs and benefits of a more user-friendly platform are reviewed, and issues relating to the lack of a general quantifiable measure of reliability (both in yield assessment for planning purposes and the optimization of operation of water-resource systems) are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1747-6593.1999.tb01046.x
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  • 2
    Electronic Resource
    Electronic Resource
    Protein loci in the Arctic charr, Salvelinus alpinus L.: electrophoretic expression and genetic variability patterns (1983)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 23 (1983), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: In the search for electrophoretically detectable protein loci in the Arctic charr, Salvelinus alpinus L., tissue samples of eye, liver, and muscle from a total of 934 specimens collected at 10 Swedish localities were analysed. General protein staining and specific staining for 33 enzymes revealed 52 detectable loci; 37 of which were considered usable in population surveys. Variability was observed at four loci coding for esterase (est-2), the liver-specific form of lactate dehydrogenase (ldh-3), and the skeletal muscle form of malate dehydrogenase (mdh-4, 5); genetic variation at loci coding for ldh-3 and mdh-4, 5 has not previously been described in the Arctic charr. Relating our results to the multiple locus studies presented in the literature including Arctic charr from Ireland and North America reveals polymorphism at approximately one-third of the loci studied in the Arctic charr, and the fraction of variable loci does not appear lower in this species than in other salmonids. There were highly significant allele frequency differences between samples. Nevertheless, there was a high degree of genetic similarity among all the populations sampled indicating that they were derived from a relatively recent common ancestor. The results are discussed in relation to the current controversy concerning the number of major evolutionary lines in Scandinavian Arctic charr.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1983.tb02883.x
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  • 3
    Electronic Resource
    Electronic Resource
    Ferric Oxide Hydrosols as Coagulants in Waste Treatment (1939)
    s.l. : American Chemical Society
    Industrial & engineering chemistry 31 (1939), S. 925-926 
    Details
    ISSN: 1520-5045
    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/ie50355a029
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  • 4
    Electronic Resource
    Electronic Resource
    Differences in the amount and distribution of genetic variation between natural populations and hatchery stocks of Atlantic salmon
    Amsterdam : Elsevier
    Aquaculture 33 (1983), S. 23-32 
    Details
    ISSN: 0044-8486
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0044-8486(83)90383-6
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  • 5
    Electronic Resource
    Electronic Resource
    Temporal and spatial segregation of spawning in sympatric populations of Atlantic salmon, Salmo salar L., and brown trout, Salmo trutta L. (1988)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 33 (1988), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Based on data from Norwegian streams with sympatric populations of Atlantic salmon and brown trout, it is suggested that temporal segregation is the main mechanism segregating Atlantic salmon and brown trout during spawning. Peak spawning of trout was about 15 days earlier than that of salmon. Physical factors, such as water depth, water velocity and distance from the river banks segregate spawning sites of salmon and trout poorly. Gravel sizes of the redds of salmon and trout were significantly different, though with a considerable overlap, and mean egg depth of salmon and trout were 0.18 and 0.12 m, respectively, probably attributable to the different size of spawners of salmon and trout. None of the temporal or spatial parameters analysed segregate spawners of salmon and trout completely. Species determination of eggs and alevins from the redds showed no interspecific superimposition of redds. It is, therefore, concluded that low survival of hybrids after hatching does not explain the low frequency of hybrids observed in sympatric populations of salmon and trout.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1988.tb05477.x
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  • 6
    Electronic Resource
    Electronic Resource
    Darstellung von Slockcopolymeren von Vinylacetat in viskosen schlechten Lösungsmitteln (1980)
    Springer
    Colloid & polymer science 258 (1980), S. 115-115 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01474972
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  • 7
    Electronic Resource
    Electronic Resource
    Preparation of block copolymers from occluded vinyl acetate macroradicals (1976)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 14 (1976), S. 2545-2552 
    Details
    ISSN: 0360-6376
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Stable vinyl acetate macroradicals were produced by polymerization in a nonviscous poor solvent, a viscous good solvent and a viscous poor solvent. These macroradicals were then allowed to react with a second vinyl monomer to produce block copolymers. The formation of block copolymers was monitored for rate and yield data. The block copolymers produced were poly(vinyl acetate-b-methyl methacrylate), poly(vinyl acetate-b-acrylic acid), poly(vinyl acetate-b-vinylpyrrolidone), poly(vinyl acetate-b-acrylonitrile), poly(vinyl acetate-b-styrene), and poly(vinyl acetate-b-methyl acrylate). The block copolymers were characterized by yield, precipitation in selected solvents, pyrolysis gas chromatography, and differential scanning calorimetry.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1976.170141019
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  • 8
    Electronic Resource
    Electronic Resource
    Copolymerization of methyl methacrylate and dodecyl methacrylate (1979)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 17 (1979), S. 1883-1886 
    Details
    ISSN: 0360-6376
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1979.170170636
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  • 9
    Electronic Resource
    Electronic Resource
    Copolymerization parameters of methyl methacrylate and acrylic acid (1981)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 19 (1981), S. 371-380 
    Details
    ISSN: 0360-6376
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The relative reactivity of acrylic acid is known to be influenced by the polymerization medium. Nonetheless, the more commonly used reactivity ratios do not show this dependence because they were calculated from low-conversion polymerizations. We have studied the copolymerization of acrylic acid and methyl methacrylate in a number of non-hydrogen-bonding and hydrogen-bonding solvents. We found that the acrylic acid fraction in the copolymer was larger when copolymerized in a non-hydrogen-bonding medium and that the methyl methacrylate fraction was larger when copolymerized in a hydrogen-bonding medium. The precise reactivity ratios were reported when toluene, benzene, isopentyl, acetate, ethyl acetate, methyl formate, and tert-butyl alcohol were used as the polymerization medium. The values were obtained by chromatographic analysis of residual monomer, followed by computation based on the nonlinear, least-squares technique of Tidwell and Mortimer.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1981.170190213
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  • 10
    Electronic Resource
    Electronic Resource
    Influence of solvents on the copolymerization of acrylic acid (1980)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Letters Edition 18 (1980), S. 811-814 
    Details
    ISSN: 0360-6384
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1980.130181211
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