Journal Article

PreJuSER-9932

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Compression of random coils due to macromolecular crowding: Scaling effects

Le Coeur, C. ; Teixeira, J. ; Busch, P.FZJ* ; Longeville, S.

2010
APS College Park, Md.

This record in other databases:  

Please use a persistent id in citations: http://hdl.handle.net/2128/9314  doi:10.1103/PhysRevE.81.061914

Abstract: The addition of a macromolecular crowding agent to a dilute solution of polymer exerts a compressive force that tends to reduce the size of the chain. We study here the effect of changing the size ratio between the random coil and the crowding agent. The compression occurs at lower crowding agent concentration, Phi when polymer molecular weight increases. The Flory exponent nu(Phi) decreases from nu(0)similar or equal to 0.48 in water down to 0.3 with macromolecular crowding. The effective polymer-polymer interactions change from repulsive to strongly attractive inducing aggregation of the chains. This effect changes drastically for larger polymer sizes, being much more pronounced at high molecular weights.

Keyword(s): J

Note: Record converted from VDB: 12.11.2012

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Contributing Institute(s):

1. Streumethoden (IFF-4)
2. Neutronenstreuung (IFF-5)
3. JCNS (Jülich Centre for Neutron Science JCNS (JCNS) ; JCNS)

Research Program(s):

1. BioSoft: Makromolekulare Systeme und biologische Informationsverarbeitung (P45)
2. Großgeräte für die Forschung mit Photonen, Neutronen und Ionen (PNI) (P55)

Experiment(s):

1. KWS-2: Small angle scattering diffractometer (NL3ao)

Appears in the scientific report 2010

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Database coverage:
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