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Complex rheological behaviors of loach (Misgurnus anguillicaudatus) skin mucus.
- Source :
-
Journal of Rheology . Jan/Feb2015, Vol. 59 Issue 1, p51-62. 12p. - Publication Year :
- 2015
-
Abstract
- The functions and structures of biological mucus are closely linked to rheology. In this article, the skin mucus of loach (Misgurnus anguillicaudatus) was proved to be a weak hydrogel susceptible to shear rate, time, and history, exhibiting: (i) Two-region breakdown of its gel structure during oscillatory strain sweep; (ii) rate-dependent thickening followed by three-region thinning with increased shear rate, and straight thinning with decreased shear rate; and (iii) time-dependent rheopexy at low shear rates, and thixotropy at high shear rates. An interesting correlation between the shear rateand time-dependent rheological behaviors was also revealed, i.e., the rheopexy-thixotropy transition coincided with the first-second shear thinning region transition. Apart from rheology, a structure of colloidal network was observed in loach skin mucus using transmission electron microscopy. The complex rheology was speculated to result from inter- and intracolloid structural alterations. The unique rheology associated with the colloidal network structure, which has never been previously reported in vertebrate mucus, may play a key role in the functions (e.g., flow, reannealing, lubrication, and barrier) of the mucus. [ABSTRACT FROM AUTHOR]
- Subjects :
- *LOACHES
*MUCUS
*RHEOLOGY
*HYDROGELS
*RHEOPEXY
*THIXOTROPY
Subjects
Details
- Language :
- English
- ISSN :
- 01486055
- Volume :
- 59
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Journal of Rheology
- Publication Type :
- Academic Journal
- Accession number :
- 119814580
- Full Text :
- https://doi.org/10.1122/1.4902928