๐Ÿ”ฌ Diffusion

Random molecular motion associated with heat energy that results in movement of untethered materials found within fluid environments.

by Stephen T. Abedon Ph.D. (abedon.1@osu.edu)

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About this entry: Diffusion is one of a growing set of phage biology and phage therapy terms defined here. For more phage terms, see Abedon, S.T. (2025). Phage Therapy Annotated Glossary. Preprints.org. 10.20944/preprints202508.0347.v1

phage.org/terms/diffusion.html  ·  Abedon’s Books  ·  DOI: 10.5281/zenodo.20173633

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Diffusion: Random molecular motion associated with heat energy that results in movement of untethered materials found within fluid environments.

Discussion

<p>The diffusion of phage virions generally is slower than that of individual molecules, even whole enzymes, due to the much larger size of virions, which generally are multi-protein and nucleic acid structures. Bacteria, in turn, generally diffuse more slowly than virons due to the typically much larger size of the bacterial cells. In general, rates of diffusion in fact are inversely proportional to size, with larger molecules, objects, or particles diffusing more slowly than smaller things.

External links

How to cite this page

Abedon, S.T. (2026). Phage Terms. https://terms.phage.org  ·  10.5281/zenodo.20173633

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Diffusion — terms.phage.orgphage.org — Stephen T. Abedon — Version 2026.05.14