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SUMMARY:Motion of uni-flagellated bacteria at interfaces and in complex me
 dia - Prof. Jay Tang\, Brown University
DTSTART:20171103T160000Z
DTEND:20171103T170000Z
UID:TALK87091@talks.cam.ac.uk
CONTACT:Lorenzo Di Michele
DESCRIPTION:Microbes inhabit planet earth over billions of years and have 
 adapted to diverse physical environments\, particularly at or near fluid b
 oundaries. A uni-flagellated bacterium\, Caulobacter crescentus\, is a spe
 cies of choice by microbiologists to study cell differentiation and geneti
 c regulation. From the perspective of fluid and surface physics\, I will d
 iscuss our study on the motility of C. crescentus swarmer cells in both vi
 scous and visco-elastic media\, their accumulation and motility near solid
  surfaces\, and their behavior at an air/water interface.  Specifically\, 
 I will describe both physical effects and surface chemistry that cause the
  motile cells to become trapped near the air/water boundary\, and strategi
 es the cells can employ to free themselves. I will also highlight the comp
 lex fluid mechanics required to predict the bacterial swimming speed in vi
 scoelastic media. \n\nThe broader goal of our study is to elucidate interf
 acial microbial functions through microscopic imaging\, data analysis\, ma
 thematical modeling\, and computer simulations based on fluid physics. By 
 understanding the mechanisms diverse species of motile bacteria have adopt
 ed through the course of evolution\, we seek to gain insights useful towar
 ds environmental and biomedical applications.\n
LOCATION:Small Lecture Theatre\, Cavendish Laboratory
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