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Evolution of bioconvective patterns in variable gravityMeasurements are reported of the evolution of bioconvective patterns in shallow, dense cultures of microorganisms subjected to varying gravity. Various statistical properties of this random, quasi-two-dimensional structure have been found: Aboav's law is obeyed, the average vertex angles follow predictions for regular polygons, and the area of a pattern varies linearly with its number of sides. As gravity varies between 1 g and 1.8 g, these statistical properties continue to hold despite a tripling of the number of polygons and a reduced average polygon dimension by a third. This work compares with experiments on soap foams, Langmuir monolayer foams, metal grains, and simulations.
Document ID
19920030618
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Noever, David A.
(NASA Marshall Space Flight Center; Universities Space Research Association, Huntsville, AL, United States)
Date Acquired
August 15, 2013
Publication Date
October 15, 1991
Publication Information
Publication: Physical Review A
Volume: 44
ISSN: 1050-2947
Subject Category
Life Sciences (General)
Accession Number
92A13242
Distribution Limits
Public
Copyright
Other

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