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- Title
Contraction behaviors of Vorticella sp. stalk investigated using high-speed video camera. II: Viscosity effect of several types of polymer additives.
- Authors
Junko Kamiguri; Noriko Tsuchiya; Ruri Hidema; Zenji Yatabe; Masahiko Shoji; Chihiro Hashimoto; Pansu, Robert Bernard; Hideharu Ushiki
- Abstract
The contraction process of living Vorticella sp. in polymer solutions with various viscosities has been investigated by image processing using a high-speed video camera. The viscosity of the external fluid ranges from 1 to 5mPa-s for different polymer additives such as hydroxypropyl cellulose, polyethylene oxide, and Ficoll. The temporal change in the contraction length of Vorticella sp. in various macromolecular solutions is fitted well by a stretched exponential function based on the nucleation and growth model. The maximum speed of the contractile process monotonically decreases with an increase in the external viscosity, in accordance with power law behavior. The index values approximate to 0.5 and this suggests that the viscous energy dissipated by the contraction of Vorticella sp. is constant in a macromolecular environment.
- Subjects
VORTICELLA; PLANT stems; IMAGE processing; HIGH-speed cinematography; ADDITIVES; POLYMERS; NUCLEATION
- Publication
Biophysics (13492942), 2012, Vol 8, p11
- ISSN
1349-2942
- Publication type
Article
- DOI
10.2142/biophysics.8.11