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Record 87 of 545
Evolution of bioconvective patterns in variable gravity
External Online Source: doi:10.1103/PhysRevA.44.5279
Author and Affiliation:
Noever, David A.(NASA Marshall Space Flight Center, Universities)
Abstract: Measurements 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.
Publication Date: Oct 15, 1991
Document ID:
19920030618
(Acquired Nov 22, 1995)
Accession Number: 92A13242
Subject Category: LIFE SCIENCES (GENERAL)
Document Type: Journal Article
Publication Information: Physical Review A (ISSN 1050-2947); 44; 5279-529
Publisher Information: United States
Financial Sponsor: NASA; United States
Organization Source: NASA Marshall Space Flight Center; Huntsville, AL, United States
Universities Space Research Association; Huntsville, AL, United States
Description: 13p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: ALGAE; BIOLOGICAL EVOLUTION; EXOBIOLOGY; GRAVITATIONAL EFFECTS; PROTOZOA; BIOLOGICAL EFFECTS; BIOLOGICAL MODELS (MATHEMATICS); STATISTICAL DISTRIBUTIONS
Imprint And Other Notes: Physical Review A (ISSN 1050-2947), vol. 44, Oct. 15, 1991, p. 5279-5291.
Availability Source: Other Sources
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