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SUMMARY:Painleve condensation\, counter-ion condensation and Coulombic ela
 sticity of biopolymers - Prof Emmanuel Trizac (Laboratoire de Physique Th
 éorique et Modèles Statistiques\, Université Paris-Sud\, France)
DTSTART:20100129T120000Z
DTEND:20100129T130000Z
UID:TALK20565@talks.cam.ac.uk
CONTACT:Dr Mark Miller
DESCRIPTION:Onsager-Manning condensation is a manifestation of the long ra
 nge character of the Coulombic potential in cylindrical geometry. This phe
 nomenon is the cornerstone of our understanding of bio-polymers.  Beyond a
  charge density threshold\, counterions "condense" onto the\ncharged polym
 er. With salt (added electrolyte)\, which is the experimentally relevant s
 ituation\, the phenomenon is more complex and has received little attentio
 n. We will show that recent mathematical advances allow to obtain analytic
 al results in a large range of salt content. We will in particular discuss
  the implications of this work for the Coulombic elasticity of bio-polymer
 s through their persistence length.
LOCATION:Unilever Lecture Theatre\, Department of Chemistry
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