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.
1952
Zone electrophoresis in a starch supporting medium.
Proceedings of Society for Experimental Biology & Medicinevol. 80 42 (heading)
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)
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
zone electrophoresis typically occurs about 0.06 times per million words in modern written English.
zone electrophoresis is in frequency band 3, which contains words occurring between 0.01 and 0.1 times per million words in modern written English. More about OED's frequency bands
Frequency data is computed programmatically, and should be regarded as an estimate.
Frequency of zone electrophoresis, n., 1950–2010
* Occurrences per million words in written English
Historical frequency series are derived from Google Books Ngrams (version 2), a data set based on the Google Books corpus of several million books printed in English between 1500 and 2010.
The overall frequency for a given word is calculated by summing frequencies for the main form of the word, any plural or inflected forms, and any major spelling variations.
For sets of homographs (distinct entries that share the same word-form, e.g. mole, n.¹, mole, n.², mole, n.³, etc.), we have estimated the frequency of each homograph entry as a fraction of the total Ngrams frequency for the word-form. This may result in inaccuracies.
Smoothing has been applied to series for lower-frequency words, using a moving-average algorithm. This reduces short-term fluctuations, which may be produced by variability in the content of the Google Books corpus.
Decade
Frequency per million words
1950
0.058
1960
0.06
1970
0.062
1980
0.063
1990
0.067
2000
0.06
2010
0.06
Originally published as part of the entry for zone, n.
zone, n. was first published in 1921; not fully revised.