In statistical mechanics, the mean squared displacement (MSD, also mean square displacement, average squared displacement, or mean square fluctuation) is a measure of the deviation of the position of a particle with respect to a reference position over time.
The diffusion-limited reaction rate constant is shown to scale with the meansquaredisplacement of a receptor-ligand complex.
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Bimodal nature of the meansquaredisplacement distribution of nucleosomes allows for a natural categorization of the nucleosomes as fast and slow.
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The measured meansquaredisplacement of a freely diffusing Brownian particle in a liquid shows a deviation from the Einstein-Smoluchowsky theory that diverges with time.