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  • Polymer and Materials Science  (2)
  • Land Use Environmental Assessment  (1)
  • 1
    Digitale Medien
    Digitale Medien
    Springer
    Environmental management 1 (1977), S. 213-226 
    ISSN: 1432-1009
    Schlagwort(e): Environmental Impact Quantification ; Environmental Studies ; Land Use Environmental Assessment ; Texas ; U.S. of A. ; Environmental Indices ; Environmental Methodology
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Energietechnik
    Notizen: Abstract A method is presented which combines environmental indices and estimates of inputs from various land uses to aid in environmental impact assessments. Unweighted pair/group cluster analyses are used to obtain relationships between easily observable environmental indices, such as vegetation types, soils, and geology, based on their mutual recurrence. These relationships are shown by using an ordination technique which shows the nature of complex impacts on a natural system. Results are used to develop anenvironmental effects sequence diagram based on known scientific and engineering principles and observed natural relationships. The diagram may be used in conjunction with land use data to estimate the possible magnitude of impacts on the pre-existing system which may result from such land use. Several examples are developed which quantify inputs from various land uses and which compare them with environmental inputs including point source and non-point source liquid and atmospheric emmissions, land modifications, and resource consumption. Known average values are used and a separate comparison is made in describing the vast differences between the project phases of construction versus longterm operation. A hypothetical environmental impact assessment is given for a small residential development in Chambers County, Texas, U.S. of A.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 7 (1963), S. 461-468 
    ISSN: 0021-8995
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Maschinenbau , Physik
    Notizen: The changes in solvent resistance and solution viscosity of polyethylene glycol and polypropylene glycol after heating with dicumyl peroxide at 140°C. are consistent with crosslinking of the former and degradation of the latter. Analytical work showed that in both cases all of the peroxide decomposed could be accounted for acetophenone and cumyl alcohol. In the case of polyethylene glycol, crosslinking results from abstraction of secondary hydrogen atoms and dimerization of the resulting radicals; in the case of polypropylene glycol abstraction of tertiary hydrogen atoms leads to radicals which break down by scission at a C—O bond to give a ketone and a more stable radical. This latter process proceeds with an efficiency of unity.
    Zusätzliches Material: 2 Ill.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    New York : Wiley-Blackwell
    Journal of Polymer Science Part B: Polymer Letters 2 (1964), S. 63-65 
    ISSN: 0449-2986
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Zusätzliches Material: 1 Ill.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
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