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Entropy measures of cellular aggregation

Monti, D.; Ariano, P.; Distasi, C.; Zamburlin, P.; … - In: Physica A: Statistical Mechanics and its Applications 388 (2009) 13, pp. 2762-2770

In this paper a measure is proposed of the rate with which the collective motion of cells leads to aggregation and … structure formation. It will be shown that the spatial entropy of the cells tends to decrease during aggregation and an index … experiments on cellular migration and aggregation. …

Persistent link: https://www.econbiz.de/10010871809

Challenges and opportunities in complex materials: silica-reinforced elastomers

Schaefer, Dale W.; Suryawanshi, Chetan; Pakdel, Peyman; … - In: Physica A: Statistical Mechanics and its Applications 314 (2002) 1, pp. 686-695

Small-angle light and X-ray scattering are used to study the morphology of reinforcing fillers in organic rubbers. The data, which extend over six orders of magnitude in length scale, reveal a complex morphology of the powders consisting of primary particles, aggregates and agglomerates. The...

Persistent link: https://www.econbiz.de/10010872369

Shear-induced clustering in a simple driven diffusive model

O’Loan, O.J.; Evans, M.R.; Cates, M.E. - In: Physica A: Statistical Mechanics and its Applications 258 (1998) 1, pp. 109-122

We study a simple lattice model of shear-induced clustering in two dimensions in which clusters of particles aggregate under an imposed shear flow and fragment stochastically. Two non-equilibrium steady states are identified: an unjammed state and a jammed state characterised by a...

Persistent link: https://www.econbiz.de/10010872377

Kinetics of clustering of carbon black suspensions by light scattering techniques

Bezot, P.; Hesse-Bezot, C. - In: Physica A: Statistical Mechanics and its Applications 271 (1999) 1, pp. 9-22

The aggregation kinetics of colloidal suspensions of nine carbon blacks in a viscous aliphatic solvent is studied … the aggregates is compared to the diffusion-limited colloidal aggregation and reaction limited colloidal aggregation …

Persistent link: https://www.econbiz.de/10010664887

Cluster growth poised on the edge of break-up, II: From reaction kinetics to thermodynamics

Koponen, I.T. - In: Physica A: Statistical Mechanics and its Applications 388 (2009) 13, pp. 2659-2665

occurring growth processes, where one may expect that aggregation driven cluster growth is poised on the edge of cluster break …-up. We propose here a statistical thermodynamics description of such a growth process governed by size dependent aggregation …

Persistent link: https://www.econbiz.de/10011063038

Integrin clustering as a result of local membrane deformations and local signaling feedbacks

Felizzi, Federico; Iber, Dagmar - In: Physica A: Statistical Mechanics and its Applications 408 (2014) C, pp. 198-211

Integrins are essential receptors for the development and functioning of multicellular animals because they mediate cell adhesion and migration, and regulate cell proliferation and apoptosis. Ligand-dependent activation of integrins involves the formation of receptor clusters and this has been...

Persistent link: https://www.econbiz.de/10011063103

Allelomimesis as a generic clustering mechanism for interacting agents

Juanico, Dranreb Earl; Monterola, Christopher; Saloma, … - In: Physica A: Statistical Mechanics and its Applications 320 (2003) C, pp. 590-600

We show that allelomimesis is a generic mechanism that could explain why the cluster-size distribution D(s) of diverse social aggregates such as animal groups and socio-economic entities all fit into a power-law distribution: D(s)∝s−τ, where τ is the critical exponent. Roughly,...

Persistent link: https://www.econbiz.de/10011063170

Fractal aggregation in aqueous solutions of porphyrins

Micali, N.; Monsu’ Scolaro, L.; Romeo, A.; Mallamace, F. - In: Physica A: Statistical Mechanics and its Applications 249 (1998) 1, pp. 501-510

We have studied the aggregation of the porphyrin trans-bis(N-methylpyridinium-4-yl)-diphenylporphyrine (t−H2Pagg) in … dynamic light scattering indicate that the aggregation produces large monodisperse clusters having a fractal structure driven … by diffusion limited aggregation (DLA). UV-visible absorption measurements have been applied to study the corresponding …

Persistent link: https://www.econbiz.de/10011063468

A dynamic light scattering study on aggregation of rodlike colloidal particles

Brunner, R.; Gall, S.; Wilke, W.; Zrinyi, M. - In: Physica A: Statistical Mechanics and its Applications 239 (1997) 4, pp. 477-485

The kinetics of aggregation of rodlike iron(III)hydroxide colloids in aqueous solution have been investigated by … dynamic light scattering. KNO3 and K2SO4 electrolytes were used in different concentrations as controllers for the aggregation … kinetics. The experimental results of the cluster growth were fitted in the fast regime to the diffusion limited aggregation …

Persistent link: https://www.econbiz.de/10010586346

Constant flux relation for aggregation models with desorption and fragmentation

Connaughton, Colm; Rajesh, R.; Zaboronski, Oleg - In: Physica A: Statistical Mechanics and its Applications 384 (2007) 1, pp. 108-114

We study mass fluxes in aggregation models where mass transfer to large scales by aggregation occurs alongside … constant flux scaling valid for simple aggregation with input. Predictions are compared with Monte Carlo simulations. …

Persistent link: https://www.econbiz.de/10010588502