102705 - BE.342/442 Thursday Topic Bioadhesives How does...

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BE.342/442 Thursday, October 27, 2005 Topic: Bioadhesives How does the body glue things together? You couldn’t build a building without cement. Even in ancient times, people used dirt to glue together structures. In biology, adhesives are very different from adhesives on the macroscale. Mussels Reading: Read about the common mussel or blue mussel at http://weichtiere.at/Mollusks/Muscheln/miesmuschel.html Check out Prof. Herbert Waite’s work at UC Santa Barbara http://www.lifesci.ucsb.edu/mcdb/faculty/waite/index.html Papov, et al. “Hydroxyarginine-containing Polyphenolic Proteins in Adhesive Plaques of the Marine Mussel Mytilus edulis .” J. Biol. Chem. 270 (34) 25 August 1995, 20183- 20192. The common mussel Mytilus edulis glues itself to surfaces using byssal threads . A stem attached to the animal’s retractor muscles attaches the animal to the thread. The thread has two subunits: Closer to the animal, the proximal thread has an untimate tensile stress on 30 MN/m 2 , an ultimate strain of 2, and a modulus (stiffness) of 20 MN/m 2 . Between the proximal thread and the attachment plaque, the distal thread has an untimate tensile stress on 85 MN/m 2 , an ultimate strain of 0.6, and a modulus (stiffness) of 150 MN/m 2 . Finally, an attachment plaque connects the byssal thread to the surface.
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This note was uploaded on 11/11/2011 for the course BIO 20.410j taught by Professor Rogerd.kamm during the Spring '03 term at MIT.

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102705 - BE.342/442 Thursday Topic Bioadhesives How does...

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