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  • 1
    Electronic Resource
    Electronic Resource
    Morphological and cultural comparison of microorganisms in surface soil and subsurface sediments at a pristine study site in Oklahoma (1988)
    Springer
    Microbial ecology 16 (1988), S. 49-64 
    Details
    ISSN: 1432-184X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Surface-soil and subsurface microfloras at the site of a shallow aquifer in Oklahoma were examined and compared with respect to (1) total and viable cell numbers, (2) colony and cell types that grew on various plating media, (3) cell morphologies seen in flotation films stripped from sample particles, and (4) cellular ultrastructure. Appreciable numbers of microbial cells were present in the subsurface (total counts: 106−107 cellsg−1; viable counts up to 106 cells · g−1), but the subsurface microflora was considerably less populous than that of the surface soil (total counts: 109 cells·g−1; viable counts: 107−108 cells · g−1). The subsurface microflora (especially that of the saturated zone) also appeared to be much less diverse, containing fewer microbial types that would grow on enumeration plates (on nutrient-rich media, 3–4 colony types versus 19–22 for the surface soil) and fewer cell types that could be distinguished by direct microscopy (3–4 types versus 17 for the surface soil). The specific types of microorganisms that were numerically predominant in the aquifer sediments were entirely different from those that were predominant in the surface soil. Moreover, the predominant types varied from one depth to another within the saturated zone. The potential metabolic capability of the subsurface microflora, as indicated by its readiness to grow rapidly on nutrient-rich media, also varied with depth.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02097404
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Book reviews (1979)
    Springer
    Higher education 8 (1979), S. 709-744 
    Details
    ISSN: 1573-174X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Nature of Science, Research, Systems of Higher Education, Museum Science
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00215992
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Surfactant interactions in poly(vinyl acetate) and poly(vinyl acetate-butyl acrylate) latexes (1981)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 26 (1981), S. 1351-1359 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Saturation adsorption and penetration adsorption of several anionic surfactants at model poly(vinyl acetate-;acrylate) latex/water interfaces are described. The effects of molecular weight and structure of anionic surfactants, latex composition, and the presence of adsorbed layers on latex particles on penetration type surfactant interactions leading to the formation of solubilized polymer-surfactant complex and latex thickening are considered. In the case of saturation-type adsorption of nonionic surfactants, surfactant adsorption at a vinyl acrylic latex/water interface is correlated satisfactorily with the polarity of polymer surface, in agreement with earlier surfactant adsorption studies.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1981.070260426
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  • 4
    Electronic Resource
    Electronic Resource
    Polymerization in water-in-oil microemulsion systems. I (1980)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 18 (1980), S. 2641-2648 
    Details
    ISSN: 0360-6376
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Phase diagrams for monomer (methyl acrylate containing microemulsions) are shown and described. Polymerizations of a series of microemulsified monomer reveals the expected linear dependence of 1/DS vs. [S]/[M] for pentanol acting as a chain transfer agent and giving a value of 5.1 × 10-4 for Cs. No break in molecular weight behavior was shown as a result of micellization at higher water contents. A comparison of molecular weights obtained by various classical methods (solution, emulsion, bulk) are also given.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1980.170180822
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    Paper (German National Licenses)
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