Diffusion of two molecular species in a crowded environment: theory and experiments (Articolo in rivista)

Type
Label
  • Diffusion of two molecular species in a crowded environment: theory and experiments (Articolo in rivista) (literal)
Anno
  • 2013-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1088/1478-3975/10/4/045008 (literal)
Alternative label
  • D. Fanelli (1); A.J. McKane (2); G. Pompili (1); B. Tiribilli (3); M. Vassalli (4); T. Biancalani (2) (2013)
    Diffusion of two molecular species in a crowded environment: theory and experiments
    in Physical biology (Online)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • D. Fanelli (1); A.J. McKane (2); G. Pompili (1); B. Tiribilli (3); M. Vassalli (4); T. Biancalani (2) (literal)
Pagina inizio
  • 045008 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://stacks.iop.org/1478-3975/10/i=4/a=045008 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 10 (literal)
Rivista
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  • 4 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • (1) Dipartimento di Energetica 'S Stecco' and INFN, University of Florence, Via S Marta 3, I-50139 Florence, Italy (2) Theoretical Physics Division, School of Physics and Astronomy, University of Manchester, Manchester M13 9PL, UK (3) Istituto dei Sistemi Complessi--CNR, Via Madonna del Piano 10, I-50019 Sesto Fiorentino, Florence, Italy (4) Institute of Biophysics CNR, Via De Marini 6, I-16149 Genoa, Italy (literal)
Titolo
  • Diffusion of two molecular species in a crowded environment: theory and experiments (literal)
Abstract
  • Diffusion of a two component fluid is studied in the framework of differential equations, but where these equations are systematically derived from a well-defined microscopic model. The model has a finite carrying capacity imposed upon it at the mesoscopic level and this is shown to lead to nonlinear cross diffusion terms that modify the conventional Fickean picture. After reviewing the derivation of the model, the experiments carried out to test the model are described. It is found that it can adequately explain the dynamics of two dense ink drops simultaneously evolving in a container filled with water. The experiment shows that molecular crowding results in the formation of a dynamical barrier that prevents the mixing of the drops. This phenomenon is successfully captured by the model. This suggests that the proposed model can be justifiably viewed as a generalization of standard diffusion to a multispecies setting, where crowding and steric interferences are taken into account. (literal)
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