Difference between revisions of "Microrheology of Microtubule Solutions and Actin-Microtubule Composite Networks"

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(New page: Microrheology of Microtubule Solutions and Actin-Microtubule Composite Networks, Vincent Pelletier, Naama Gal, Paul Fournier and Maria Kilfoil, PRL vol.102 188303 (2009) [http://link.aip.o...)
 
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microtubules has viscoelastic behavior between that of F-actin and pure microtubules. We further show  
 
microtubules has viscoelastic behavior between that of F-actin and pure microtubules. We further show  
 
that the Poisson ratio of the composite, measured by the length-scale dependent two-point microrheology,  
 
that the Poisson ratio of the composite, measured by the length-scale dependent two-point microrheology,  
is robustly smaller than that of the F-actin network at time scale<math>\tau</math> > 1 s, suggesting that a local  
+
is robustly smaller than that of the F-actin network at time scale <math>\tau</math> > 1 s, suggesting that a local  
 
compressibility is conferred by the addition of microtubules to the F-actin network."
 
compressibility is conferred by the addition of microtubules to the F-actin network."
  

Revision as of 20:11, 28 November 2009

Microrheology of Microtubule Solutions and Actin-Microtubule Composite Networks, Vincent Pelletier, Naama Gal, Paul Fournier and Maria Kilfoil, PRL vol.102 188303 (2009) [1]

Keywords

Microrheology, Cytoskeleton, Viscoelasticity

Original Abstract from Paper

"We perform local or microrheological measurements on microtubule solutions, as well as composite networks. The viscoelastic properties of microtubules as reported from two-point microrheology agree with the macroscopic measurement at high frequencies, but appear to show a discrepancy at low frequencies, at time scales on the order of a second. A composite of filamentous actin (F-actin) and microtubules has viscoelastic behavior between that of F-actin and pure microtubules. We further show that the Poisson ratio of the composite, measured by the length-scale dependent two-point microrheology, is robustly smaller than that of the F-actin network at time scale <math>\tau</math> > 1 s, suggesting that a local compressibility is conferred by the addition of microtubules to the F-actin network."

Soft Matter

Figure 1