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Word: carboxylic (lookup in dictionary) (lookup stats)
Dates: during 1950-1959
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Usage:

...Compounds containing an amino (NH2) group and a carboxyl (COOH) group. †An analytical method which separates and identifies similar substances by the rate at which they creep through treated filter paper...

Author: /time Magazine | Title: Science: Protein Puzzle | 8/4/1952 | See Source »

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