ArticleThe Journal of cell biology1983
Rheological properties of living cytoplasm: endoplasm of Physarum plasmodium.
Article in The Journal of cell biology, 1983. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.
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Who cites it
16 citing papers in PubMed.
- A mathematical model to predict network growth inJournal of the Royal Society, Interface · 2025Article
- A brief history of liquid computers.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2019Review
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- An active poroelastic model for mechanochemical patterns in protoplasmic droplets of Physarum polycephalum.PloS one · 2014Article
- Article
- Article
- Direct observations of the mechanical behaviors of the cytoskeleton in living fibroblasts.The Journal of cell biology · 1999Article
- Mechanisms of cell shape change: the cytomechanics of cellular response to chemical environment and mechanical loading.The Journal of cell biology · 1992Article
- Chromosome motion during attachment to the vertebrate spindle: initial saltatory-like behavior of chromosomes and quantitative analysis of force production by nascent kinetochore fibers.The Journal of cell biology · 1991Article
- Liquid crystal domains and thixotropy of filamentous actin suspensions.Proceedings of the National Academy of Sciences of the United States of America · 1990Article
- Internal cell manipulation using infrared laser traps.Proceedings of the National Academy of Sciences of the United States of America · 1989Article
- Mechanics and control of the cytoskeleton in Amoeba proteus.Biophysical journal · 1989Article
- Microheterogeneity of actin gels formed under controlled linear shear.The Journal of cell biology · 1988Article
- Mechanical properties of brain tubulin and microtubules.The Journal of cell biology · 1988Article
- Magnetic particle motions within living cells. Measurement of cytoplasmic viscosity and motile activity.Biophysical journal · 1987Article
- Cytoplasmic motions, rheology, and structure probed by a novel magnetic particle method.The Journal of cell biology · 1985Article
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3 authors.
Funding
Abstract
Magnetic sphere viscoelastometry, video microscopy, and the Kamiya double chamber method (Kamiya, N., 1940, Science [Wash. DC], 92:462-463.) have been combined in an optical and rheological investigation of the living endoplasm of Physarum polycephalum. The rheological properties examined were yield stress, viscosity (as a function of shear), and elasticity. These parameters were evaluated in directions perpendicular; (X) and parallel (Y) to the plasmodial vein. Known magnetic forces were used for measurements in the X direction, while the falling ball technique was used in the Y direction (Cygan, D.A., and B. Caswell, 1971, Trans. Soc. Rheol. 15:663-683; MacLean-Fletcher, S.D., and T.D. Pollard, 1980, J. Cell Biol., 85:414-428). Approximate yield stresses were calculated in the X and Y directions of 0.58 and 1.05 dyn/cm2, respectively. Apparent viscosities measured in the two directions (eta x and eta y) were found to fluctuate with time. The fluctuations in eta x and eta y were shown, statistically, to occur independently of each other. Frequency correlation with dynamoplasmograms indicated that these fluctuations probably occur independently of the streaming cycle. Viscosity was found to be a complex function of shear, indicating that the endoplasm is non-Newtonian. Plots of shear stress vs. rate of shear both parallel and perpendicular to the vein, showed that endoplasm is not a shear thinning material. These experiments have shown that living endoplasm of Physarum is an anisotropic viscoelastic fluid with a yield stress. The endoplasm appears not to be a homogeneous material, but to be composed of heterogeneous domains.
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