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Anisotropy and Gradients

  • John C. Russ
  • Robert T. Dehoff

Abstract

Much of the discussion of stereological measurement in other chapters has emphasized the importance of isotropic, uniform and random sampling of the structure. The techniques by which isotropic sampling can be accomplished using vertical sections and cycloids, for example, can be applied even to materials that are not themselves isotropic. In fact, there are very few real samples for which isotropy or uniformity can be assumed. Biological specimens usually have complex directional relationships between local structure and the organism, geological strata preserve orientation information even when tilted, folded or faulted, plants know which way gravity points and where the sun shines, and materials bear the marks of their solidification and processing history, and even (except for a few precious shuttlegrown crystals) gravity.

Keywords

Prefer Orientation Neighbor Distance Biological Specimen Radial Line Color Representation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 2000

Authors and Affiliations

  • John C. Russ
    • 1
  • Robert T. Dehoff
    • 2
  1. 1.North Carolina State UniversityRaleighUSA
  2. 2.University of FloridaGainesvilleUSA

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