zone-electrophoresishttp://www.oed.com/dictionary/zone-electrophoresis_n%3Ftab%3Dmeaning_and_usezone electrophoresis, n.
First published 1986; not fully revised

zone electrophoresisnoun

  1. 1952–
    Electrophoresis in which a solid but porous medium such as paper is used to ensure that the components remain separated in zones or bands according to their differing electrophoretic mobilities.
    1. 1952
      Zone electrophoresis in a starch supporting medium.
      Proceedings of Society for Experimental Biology & Medicine vol. 80 42 (heading)
    2. 1964
      The separation of some of the human plasma proteins by zone electrophoresis.
      G. H. Haggis et al., Introduction to Molecular Biology ii. 23 (caption)
    3. 1975
      A common feature of the use of all supporting media is that the substances migrate as distinct zones which at the end of the analysis can be readily detected by suitable analytical techniques... The term zone electrophoresis has been applied to this method.
      Davis & Simpkins in Williams & Wilson, Biologist's Guide to Principles & Techniques of Practical Biochemistry iv. 100

Originally published as part of the entry for zone, n.

zone, n. was first published in 1921; not fully revised.