Abstract
We developed and obtained close-form solutions for the buckling growth rate of microtubule (MT) bundles using the Timoshenko beam theory. We took into consideration the surface effects and the Poisson’s ratio of the microtubules surrounded by neighbouring filaments in the viscous cytosol. We developed the motion equation by using the modified couple stress theory (MCST) which will take into account the small-scale effects of the microtubules. We then proceeded by studying the effects of various parameters on the buckling growth rate of microtubule bundles. Our results show that the internal material length scale parameter has a decreasing effect on the buckling growth rate of the microtubule bundle. And as microtubule added in the bundle increases, the buckling growth rate reduces further due to the effects of the surrounding microtubule-associated proteins (MAPs). On the contrary, the Poisson’s ratio has an increasing effect on the value of the buckling growth rate of the microtubule bundle. We also investigated the effects of other parameters such as surface energy on the buckling growth rates of microtubule bundles and showed the validity of our model by comparing our results with those obtained by previous researchers.
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KENFACK-SADEM, C., WOPUNGHWO, S.N., NGANFO, W.A. et al. Influence of surface parameters and Poisson’s ratio on the buckling growth rate of a microtubule system using the modified couple stress theory. Pramana - J Phys 96, 16 (2022). https://doi.org/10.1007/s12043-021-02244-4
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DOI: https://doi.org/10.1007/s12043-021-02244-4