#adsorption__surface_assimilation__surfaceassimilation  the accumulation of molecules of a gas to form a thin film on the surface of a solid
  supertype:  #sorption  the process in which one substance takes up or holds another (by either absorption or adsorption)
  subtype:  #chemisorption  adsorption (especially when irreversible) by means of chemical instead of physical forces; "chemisorption of gaseous nitrogen on iron catalysts"

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