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Ciliary propulsion of objects in tubes: wall drag on swimming Tetrahymena (Ciliata) in the presence of mucin and other long-chain polymers

Winet, H. (1976) Ciliary propulsion of objects in tubes: wall drag on swimming Tetrahymena (Ciliata) in the presence of mucin and other long-chain polymers. Journal of Experimental Biology, 64 (2). pp. 283-302. ISSN 0022-0949. http://resolver.caltech.edu/CaltechAUTHORS:20120814-101852312

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Abstract

The lubrication effect of three long-chain polymers - mucin, methylcellulose and Ficoll - on ciliary propulsion in tubes is measured by plotting the relative velocities of swimming cilitates as a function of the tube bore diameter. Mucin shows the most unequivocal lubrication, which is found at concentrations between 0% and 9.1% (w/v). This observation, coupled with viscometric measurements which show that ciliary tip shear rates are sufficient to solate mucin, serve as the groundwork for a model of mucin lubrication which explains the optimized lubrication behaviour of thixotropic gelating polymers as an expression of the response to shear by the various stages of polymer clustering during the gelatin process. In addition to the lubricative effect, another wall drag reduction effect by mucin was measured in the clearance region beyond the lubrication layer. This apparent viscosity reduction is optimized in the concentration range between 1.7% and 4.1% mucin and may also be explained in terms of the properties of gel clustering.


Item Type:Article
Related URLs:
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http://jeb.biologists.org/content/64/2/283.abstractPublisherUNSPECIFIED
Additional Information:© 1976 by Company of Biologists. Received 4 July 1975. This work was supported by National Science Foundation Grant GK31161X and a contract from the Office of Naval Research, N00014-67-A-0094-0012. I would like to thank Dr Stanley A. Berger and Dr Charles J. Brokaw for critical reading of the manuscript and Dr Christopher Brennen for many useful conversations.
Funders:
Funding AgencyGrant Number
NSFGK31161X
Office of Naval Research (ONR)N00014-67-A-0094-0012
Record Number:CaltechAUTHORS:20120814-101852312
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20120814-101852312
Official Citation: H. Winet Ciliary propulsion of objects in tubes: wall drag on swimming Tetrahymena (Ciliata) in the presence of mucin and other long-chain polymers J Exp Biol 1976 64:283-302.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:33159
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:14 Aug 2012 17:33
Last Modified:26 Dec 2012 15:58

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