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Related Concept Videos

Intrinsically Disordered Proteins02:18

Intrinsically Disordered Proteins

Intrinsically disordered proteins are a group of proteins that do not fold into specific three-dimensional structures. Their structural flexibility allows them to complement ordered proteins to perform functions that are inaccessible to rigid structures. They are more common in eukaryotes than prokaryotes and may either be exclusively intrinsically disordered or hybrid proteins, consisting of a mix of ordered and disordered regions. The absence of a rigid structure in these proteins can be...
Intrinsically Disordered Proteins02:18

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Atoms and molecules interact with each other through intermolecular forces. These electrostatic forces arise from attractive or repulsive interactions between particles with permanent, partial, or temporary charges. The intermolecular forces between neutral atoms and molecules are ion–dipole, dipole–dipole, and dispersion forces, collectively known as van der Waals forces.Polar molecules have a partial positive charge on one end and a partial negative charge on the other end of the molecule,...
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Paramagnetic Relaxation Enhancement for Detecting and Characterizing Self-Associations of Intrinsically Disordered Proteins
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Published on: September 23, 2021

Strong mobility in weakly disordered systems.

E Ben-Naim1, P L Krapivsky

  • 1Theoretical Division and Center for Nonlinear Studies, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.

Physical Review Letters
|June 13, 2009
PubMed
Summary
This summary is machine-generated.

Disorder in one-dimensional systems with interacting particles enhances mobility, leading to superdiffusive transport. This contrasts with subdiffusive behavior in the absence of disorder, demonstrating disorder

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Area of Science:

  • Condensed Matter Physics
  • Statistical Mechanics
  • Complex Systems

Background:

  • Transport phenomena in disordered systems are crucial for understanding many physical processes.
  • Interacting particle systems exhibit complex dynamics influenced by both interactions and disorder.
  • Previous studies often focused on diffusive or subdiffusive transport in such systems.

Purpose of the Study:

  • To investigate the transport of interacting particles in a one-dimensional disordered medium.
  • To analyze the effect of disorder on particle mobility and displacement.
  • To explore the interplay between hard-core interactions and disorder.

Main Methods:

  • Theoretical analysis using scaling arguments.
  • Numerical simulations of a one-dimensional lattice model.
  • Modeling of inhomogeneous hopping rates (disorder) and exclusion interactions (hard core).

Main Results:

  • Particle displacement exhibits superdiffusive behavior (sigma ~ t^(2/3)) in the presence of disorder.
  • Disorder significantly enhances particle mobility compared to the subdiffusive behavior (sigma ~ t^(1/4)) without disorder.
  • Simulations confirm that disorder increases mobility over intermediate timescales, irrespective of disorder strength.

Conclusions:

  • Disorder plays a critical role in enhancing particle mobility in one-dimensional interacting systems.
  • The superdiffusive transport observed is a direct consequence of the interplay between disorder and particle interactions.
  • This work provides a theoretical and numerical framework for understanding anomalous transport in complex media.