保阪 悠人: Yuto HOSAKA

首都大学東京: Tokyo Metropolitan University

保阪 悠人 (Yuto HOSAKA)

News

Active diffusion in a membrane:

Anomolous diffusion in biocells and membranes has been observed so far. Here we theoretically obtained the diffusion coefficient of the tracer in the 2D membrane where active force dipoles mimicking enzymes are present. The diffusion turned out to deviate from the thermal diffusion. [Y. Hosaka, et al., PRE 95, 052407 (2017)]

Rheology of enzyme solutions:

We are now interested in the rheological properties of an enzyme solution because it would be complementary to the exsting Microrheology, which investigates the local properties in cells or membranes.

Publications

  1. Nonequilibrium probability flux of a thermally driven micromachine, I. Sou, Y. Hosaka, K. Yasuda, and S. Komura,
    Phys. Rev. E 100, 022607(10pp) (2019).

  2. Three-disk microswimmer in a supported fluid membrane, Y. Ota, Y. Hosaka, K. Yasuda, and S. Komura,
    Phys. Rev. E 97, 052612(7pp) (2018).

  3. Thermally driven elastic micromachines, Y. Hosaka, K. Yasuda, I. Sou, R. Okamoto, and S. Komura,
    J. Phys. Soc. Jpn. 86, 113801(4pp) (2017).

  4. Elastic three-sphere microswimmer in a viscous fluid, K. Yasuda, Y. Hosaka, M. Kuroda, R. Okamoto, and S. Komura,
    J. Phys. Soc. Jpn. 86, 093801(4pp) (2017).

  5. Lateral diffusion induced by active proteins in a biomembrane, Y. Hosaka, K. Yasuda, R. Okamoto, and S. Komura,
    Phys. Rev. E 95, 052407(10pp) (2017).

Oral presentations (Abroad)

  1. Y. Hosaka, S. Komura, and D. Andelman,
    Shear viscosity of active enzyme solutions,
    Workshop on Soft Matter Out of Equilibrium: from driven to active systems, Beijing, May, 2019

    1. Oral presentations (Japan)

      1. Y. Hosaka, D. Andelman, and S. Komura,
        Shear viscosity of active enzyme solutions,
        日本物理学会(The Physical Society of Japan)第74回年次大会, 15aG216-5, 福岡, 2019年3月

      2. Y. Hosaka, S. Komura, A. S. Mikhailov, and David Andelman,
        Active dimer model and its application to rheological properties of enzyme suspension,
        第17回関東ソフトマター研究会(Kanto Softmatter), 東京, 2018年8月

      3. Y. Hosaka, S. Komura, and A. S. Mikhailov,
        Active dimer model for molecular machines,
        日本物理学会(The Physical Society of Japan)第73回年次大会, 23aK702-14, 千葉, 2017年3月

      Poster presentations (Abroad)

      1. Y. Hosaka, D. Andelman, and S. Komura,
        Shear viscosity of active enzyme solutions,
        The 5th International Soft Matter Conference, Poster AC14, Edinburgh, 2019/06/04

      2. Y. Hosaka, S. Komura, and D. Andelman,
        Rheological properties of an enzyme suspension,
        International Conference on Advances in Physics of Emergent orders in Fluctuations, Poster B62, Tokyo, 2018/11

      3. Y. Hosaka, S. Komura, and A. S. Mikhailov,
        Stochastic properties of an active force dipole,
        International Symposium on Fluctuation and Structure out of Equilibrium, Poster A306, 仙台, 2017年11月

      4. Y. Hosaka, K. Yasuda, R. Okamoto, and S. Komura,
        Lateral diffusion induced by active proteins in a biomembrane,
        The 4th Research Area Meeting in Synergy of Fluctuation and Structure, Poster 30, 東京, 2017年6月

      Poster presentations (Japan)

      1. Y. Hosaka, S. Komura, and D. Andelman,
        Shear viscosity of catalytic enzyme solutions,
        第18回関東ソフトマター研 究会, ポスター 22, 東京 2019年8月

      2. Y. Hosaka, S. Komura, and D. Andelman,
        Rheological properties of an enzyme suspension,
        第8回ソフトマター研究会, ポスター 09, 東京 2018年12月

      3. Y. Hosaka, S. Komura, and A. S. Mikhailov,
        Stochastic properties of force dipoles,
        第16回関東ソフトマター研究会, ポスター 33, 東京 2017年8月

      4. Y. Hosaka, K. Yasuda, S. Komura, A. S. Mikhailov,
        Lateral self-diffusion induced by active proteins in a biomembrane,
        International Workshop on Hydrodynamic Flows in/of Cells, 東京, 2016年11月

      5. Y. Hosaka, K. Yasuda, S. Komura, A. S. Mikhailov,
        Lateral self-diffusion induced by active proteins in a biomembrane,
        第15回関東ソフトマター研究会, ポスター A7, 東京, 2016年8月