Coefficient of kinetic friction (μ) of pleural mesothelium blotted with filter paper, and rewetted with Ringer solution markedly increases; this increase is removed if a sufficient amount of sialomucin or hyaluronan is added to Ringer (Bodega et al., 2012. Respiratory Physiology and Neurobiology 180, 34–39). In this research we found that μ of pleural mesothelium blotted, rewetted, and sliding at physiological velocities and loads, decreased with increase of velocity, mainly at low velocities. Despite this decrease, μ at highest velocity was still double that before blotting. With small concentration of sialomucin or hyaluronan μ was markedly smaller at each velocity, decreased less with increase of velocity, and at highest velocity approached preblotting value. These findings indicate a regime of mixed lubrication in post-blotting Ringer, at variance with boundary lubrication occurring before blotting or postblotting with sufficient macromolecule addition. Greater roughness of mesothelial surface, caused by blotting, likely induces zones of elastohydrodynamic lubrication, which increase with velocity, while contact area decreases

Mixed lubrication after rewetting of blotted pleural mesothelium / F. Bodega, C.M.E. Sironi, C.E.H. Porta, M.M. Pecchiari, L.A.M. Zocchi, E. Agostoni. - In: RESPIRATORY PHYSIOLOGY & NEUROBIOLOGY. - ISSN 1569-9048. - 185:2(2013 Jan 15), pp. 369-373.

Mixed lubrication after rewetting of blotted pleural mesothelium

F. Bodega
Primo
;
C.M.E. Sironi
Secondo
;
C.E.H. Porta;M.M. Pecchiari;L.A.M. Zocchi
Penultimo
;
E. Agostoni
Ultimo
2013

Abstract

Coefficient of kinetic friction (μ) of pleural mesothelium blotted with filter paper, and rewetted with Ringer solution markedly increases; this increase is removed if a sufficient amount of sialomucin or hyaluronan is added to Ringer (Bodega et al., 2012. Respiratory Physiology and Neurobiology 180, 34–39). In this research we found that μ of pleural mesothelium blotted, rewetted, and sliding at physiological velocities and loads, decreased with increase of velocity, mainly at low velocities. Despite this decrease, μ at highest velocity was still double that before blotting. With small concentration of sialomucin or hyaluronan μ was markedly smaller at each velocity, decreased less with increase of velocity, and at highest velocity approached preblotting value. These findings indicate a regime of mixed lubrication in post-blotting Ringer, at variance with boundary lubrication occurring before blotting or postblotting with sufficient macromolecule addition. Greater roughness of mesothelial surface, caused by blotting, likely induces zones of elastohydrodynamic lubrication, which increase with velocity, while contact area decreases
friction coefficient ; hyaluronan ; lubrication regime ; pleural mesothelium ; sialomucin ; sliding velocity
Settore BIO/09 - Fisiologia
15-gen-2013
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/217325
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