Continuum mechanics approach to shape and motility of filamentous

• Project/Area Number: 20740241
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Biophysics/Chemical physics
• Research Institution: Kyoto University
• Principal Investigator: 和田 浩史 Kyoto University, 基礎物理学研究所, 助教 (50456753)
• Project Period (FY): 2008 – 2009
• Project Status: Completed (Fiscal Year 2009)
• Budget Amount: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000); Fiscal Year 2009: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2008: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
• Keywords: 弾性理論 / 流体力学 / バクテリア / らせん / アクティブマター / 生物物理 / 微生物 / 流体 / 統計力学 / 計算物理

Research Abstract

We have developed the general theoretical method to study nonlinear and nonequilibirum dynamics of elastic filaments in a viscous fluid. The method was applied to the problems of polymorphic transition kinetics of bacterial flagella filaments and of the swimming motility of helical-shaped bacterial cells. We have successfully obtained quantitative understandings on those problems. Comparison of our results to available experimental data suggests that the physical and mechanics point of view is indeed important to reveal "design principle" of shapes of microscopic life.

Research Products

• [Journal Article] Mechanics and size-dependent elasticity of composite network (2009)
  • Author(s): H. Wada, Y. Tanaka
  • Journal Title: Europhys. Lett Pages: 58001-58001
  • Peer Reviewed
• [Journal Article] Plectoneme creation reduces the rotational friction of a polymer (2009)
  • Author(s): H. Wada, R.R. Netz
  • Journal Title: Europhys. Lett 88 Pages: 49901-49901
  • Peer Reviewed
• [Journal Article] Hydrodynamics of helical-shaped bacterial motility (2009)
  • Author(s): H. Wada, R.R. Netz
  • Journal Title: Phys. Rev. E 80 Pages: 21921-21921
  • Peer Reviewed
• [Journal Article] Internal friction and nonequilibrium unfolding of polymeric globules (2009)
  • Author(s): A. Alexander-katz, H. Wada, R.R. Netz
  • Journal Title: Phys. Rev. Lett 103 Pages: 28102-28102
  • Peer Reviewed
• [Journal Article] Manipulation of colloids by noneqilibrium depletion force under temperature gradients (2009)
  • Author(s): H-R. Jiang, H. Wada, N. Yoshinaga, M. Sano
  • Journal Title: Phys. Rev. Lett 102 Pages: 208301-208301
  • Peer Reviewed
• [Journal Article] Semiflexible polymer ring acting as a nano-propeller (2009)
  • Author(s): H. Wada
  • Journal Title: Eur. Phys. J. E 28 Pages: 11-11
  • Peer Reviewed
• [Journal Article] Internal friction and nonequilibirum unfolding of polymeric globules (2009)
  • Author(s): A.Alexander-Katz, H.Wada, R.R.Netz
  • Journal Title: Physical Review Letters 103
  • Peer Reviewed
• [Journal Article] Hydrodynamics of helical-shaped bacterial motility (2009)
  • Author(s): H.Wada, R.R.Netz
  • Journal Title: Physical Review E 80
  • Peer Reviewed
• [Journal Article] Plectoneme creation reduces the rotational friction of a polymer (2009)
  • Author(s): H.Wada, R.R.Netz
  • Journal Title: Europhysics Letters (EPL) 87
  • Peer Reviewed
• [Journal Article] Mechanics and size-dependent elasticity of composite networks (2009)
  • Author(s): H.Wada, Y.Tanaka
  • Journal Title: Europhysics Letters (EPL) 87
  • Peer Reviewed
• [Journal Article] Semiflexible polymer ring acting as a nano-propeller (2009)
  • Author(s): H. Wada
  • Journal Title: European Physical Journal E 28 Pages: 11-16
  • Peer Reviewed
• [Journal Article] Manipulation of colloids by nonequilibrium depletion force under temperature gradients (2009)
  • Author(s): R-H. Jiang, H. Wada, N. Yoshinaga, and M. Sano
  • Journal Title: Physical Review Letters
  • Peer Reviewed
• [Journal Article] Discrete elastic model for stretching-induced flagellar polymorphs (2008)
  • Author(s): H. Wada, R.R. Netz
  • Journal Title: Europhys. Lett 82 Pages: 28001-28001
  • Peer Reviewed
• [Journal Article] Discrete elastic model for stretching-induced polymorphic transformations (2008)
  • Author(s): H. Wada, & R. R. Netz
  • Journal Title: Europhysics LetterS (EPL) 82
  • Peer Reviewed
• [Presentation] 粘弾性流体のポンピング (2010)
  • Author(s): 和田浩史
  • Organizer: 第65回日本物理学会
  • Place of Presentation: 岡山大学
  • Year and Date: 2010-03-22
• [Presentation] Working with elastic filaments: Some examples (2009)
  • Author(s): 和田浩史
  • Organizer: 日本数理生物学会
  • Place of Presentation: 東大駒場キャンパス
  • Year and Date: 2009-09-09
• [Presentation] Working with elastic filaments : Some examples (2009)
  • Author(s): Hirofumi Wada
  • Organizer: 日本数理生物学会 (シンポジウム講演)
  • Place of Presentation: 東京大学駒場キャンパス
  • Year and Date: 2009-09-09
• [Presentation] Spiroplasma Swimming: Active vs. Brownian Motion (2009)
  • Author(s): Hirofumi Wada
  • Organizer: Workshop on Active Matter: Physics of Biokinetics
  • Place of Presentation: 東大本郷キャンパス
  • Year and Date: 2009-07-24
• [Presentation] Rotating a polymer at nonequilibrium (2009)
  • Author(s): Hirofumi Wada
  • Organizer: ACAM Workshop: Driven microfluidic systems
  • Place of Presentation: ダブリン、アイルランド
  • Year and Date: 2009-05-23
• [Presentation] Rotating a polymer at nonequilibrium (2009)
  • Author(s): Hirofumi Wada
  • Organizer: ACAM Workshop : Driven microfluidic systems
  • Place of Presentation: ダブリン アイルランド
• [Presentation] Spiroplasma Swimming : Active vs.Brownian Motion (2009)
  • Author(s): Hirofumi Wada
  • Organizer: Workshop on Active Matter: Physics of Biokinetics
  • Place of Presentation: 東京大学本郷キャンパス
• [Presentation] Hydrodynamics of helical-shaped bacterial motility (2008)
  • Author(s): 和田浩史
  • Organizer: 日本生物物理学会
  • Place of Presentation: 福岡
  • Year and Date: 2008-12-04