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Micromechanical spectroscopy of cartilage proteoglycans: Hydration

✍ Scribed by Lamure, Alain ;Harmand, Marie-Fran�oise ;Lacabanne, Colette

Publisher
John Wiley and Sons
Year
1990
Tongue
English
Weight
749 KB
Volume
24
Category
Article
ISSN
0021-9304

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✦ Synopsis

Proteoglycan subunits extracted from calf cartilage have been studied with a high resolving power mechanical spectroscopy: the Thermostimulated Creep (TSC). The influence of hydration on TSC spectra shows the existence of two types of bound water: the weakly bound water increases the inertia of proteoglycan and stiffens their structure; the strongly bound water is responsible to a compensation law indicating the existence of a resonance phenomenon at the physiological temperature. Because of the looseness of bonds in weakly bound water, an increase of the local pressure may induce, in viuo, a release of water i11 tissues. This hypothesis explains perfectly the role of a water pump of proteoglycans in cartilage.

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