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SUMMARY:Dynamics of a bacterium moving by chemotaxis in its own secretion 
 - Dr Ankush Sengupta (Institute for theoretical physics\, University of Du
 esseldorf)
DTSTART:20090710T110000Z
DTEND:20090710T120000Z
UID:TALK18921@talks.cam.ac.uk
CONTACT:Dr Mark Miller
DESCRIPTION:The brownian dynamics of a single bacterium coupled by chemota
 xis to a diffusing concentration field which is secreted by the particle i
 tself is studied by computer simulations in spatial dimensions d = 1\, 2\,
  3. Both cases of a chemoattractant and a chemorepellent are discussed. Fo
 r a chemoattractant\, we find a transient dynamical arrest until the parti
 cle diffuses for long times. For a chemorepellant\, there is a transient b
 allistic motion in all dimensions and a long-time diffusion. These results
  are interpreted with the help of appropriate arguments and theoretical an
 alysis.
LOCATION:Unilever Lecture Theatre\, Department of Chemistry
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