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Optical Fluid Pump: Generation of Directional Flow via Microphase Segregation/Homogenization Brief Summary: ''... When geometrical asymmetry is introduced around the laser focus in the chamber, continuous directional flow is generated, accompanied by the emergence of water-rich microdroplets at the laser focus in a mixture of water and triethylamine (TEA). The emerging microdroplets tend to escape toward the surrounding bulk solution and then merge/annihilate into the homogeneous solution. The essential features of the directional flow are reproduced through a simple numerical simulation using fluid dynamic equations.. ...'' |
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Three-dimensional cell geometry controls excitable membrane signaling in Dictyostelium cells Brief Summary: ''... Using a novel method of three-dimensional analysis of the entire cell membrane of Dictyostelium cells, we found that PtdInsP3 domains can propagate persistently in any direction on the entire plasma membrane, while their propagation direction and speed are governed by the geometry of the cell. This study opens more general questions about how the system geometry and spatiotemporal signaling interact to control pattern dynamics. ...'' |
