[セミナー］第50回IPB セミナーを下記の通り開催します。

[セミナー］第50回IPB セミナーを下記の通り開催します。
日時：2024年4月5日（金）14:00
場所：東大本郷キャンパス理学部1号館512室　hybrid開催
講演者：Lucas Goehring 氏 (ノッティンガム・トレント大学)
タイトル：Collective organization in cyanobacteria
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https://u-tokyo-ac-jp.zoom.us/meeting/register/tZApduGoqj8qHdTJRVvEnDHESv2wH2cUugB8

Abstract:
Filamentous cyanobacteria can show fascinating patterns of
self-organization, which however are not well-understood from a physical
perspective. We investigate the motility and collective organization of
colonies of these simple multicellular lifeforms. As their area density
increases, linear chains of cells gliding on a substrate show a transition
from an isotropic distribution to bundles of filaments arranged in a
reticulate pattern. Based on our experimental observations of individual
behavior and pairwise interactions, we introduce a model accounting for the
filaments’ large aspect ratio, fluctuations in curvature, motility, and
nematic interactions. This minimal model of active filaments recapitulates
the observations, and rationalizes the appearance of a characteristic
lengthscale in the system, based on the Peclet number of the cyanobacteria
filaments.