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    The fractal nature of biological aggregates

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    Author
    Wilkinson, Daniel Brian, 1958-
    Issue Date
    1989
    Keywords
    Fractals.
    Advisor
    Logan, Bruce E.
    
    Metadata
    Show full item record
    Publisher
    The University of Arizona.
    Rights
    Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
    Abstract
    This project demonstrates that biological aggregates are fractal. Zoogloea ramigera and Sacharomyces cerevisiae aggregates were grown in pure cultures, isolated, sized, and dispersed into single cells. Aggregate surface area, length, cells per floc, and porosity were determined and used to calculate fractal dimensions from four power law relationships. A fractal dimension of 1.94 ± .18 was calculated for Z. ramigera aggregates cultured in test tubes. This value is significantly less than the Euclidean value of 3, and indicates that these aggregates are highly fractal. S. cerevisiae aggregates cultured in test tubes had a fractal dimension of 2.86 ± .33 indicating that these aggregates are less fractal and more compact than Z. ramigera aggregates cultured under identical conditions. Z. ramigera aggregates cultured in a mixed Virtis reactor had a fractal dimension of 2.87 ± .29 indicating that the fractal nature of these aggregates is a function of the fluid environment.
    Type
    text
    Thesis-Reproduction (electronic)
    Degree Name
    M.S.
    Degree Level
    masters
    Degree Program
    Graduate College
    Civil Engineering and Engineering Mechanics
    Degree Grantor
    University of Arizona
    Collections
    Master's Theses

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