IFLYSIB   05383
INSTITUTO DE FISICA DE LIQUIDOS Y SISTEMAS BIOLOGICOS
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Self-organization, self-assembly and SARL potential.
Autor/es:
ARIEL G. MEYRA; GUILLERMO J. ZARRAGOICOECHEA
Lugar:
Madrid
Reunión:
Workshop; II CONIN Workshop program (March 7th-8th, 2018); 2018
Institución organizadora:
Instituto de Quimica Fisica Rocasolano, CSIC, Madrid
Resumen:
Some applications of the short-range attraction/long-range repulsion (SARL) potential are shown in this presentation. This kind of interaction is used to represent self-assembly or self-organization in various systems. First, it is shown an application in ecology. When an ecosystem is under hydric stress, individuals self-organize forming different but very interesting spatial patterns. In this case, attractions are associated with collaboration between individuals while repulsion is associatedwith the competition for resources between them. Monte Carlo simulations are done in the Grand Canonical ensemble. External resources injected into the systems are, for instance, precipitationsor nutrients in the soil. Results show a qualitative agreement between the simulated and the observed patterns on different semi-arid ecosystems on Earth. Another system is a coarse-grained representation of nanoparticles that interact through a SARL potential over a surface of a sphere of different radios. Simulations run over a NVT ensemble at different temperatures (parallel tempering technique). The system self-assembles forming very distinct patterns, as a function ofthe concentration and temperature. Finally, we use this kind of potential to represent cellular interaction and differentiation, or the reproduction and death of individuals in a growing system. The system model consists of an initial configuration where two components are distributed indifferent zones of the simulation cell, without mixing. This system is allowed to evolve using Monte Carlo simulation in the Grand Canonical ensemble. Results show that the patterns and behavior obtained (connection of isolated areas of the same characteristics) represent, forexample, the vascularization of tissues, where cells with a certain functionality try to connect with each other.