PHYSIOLOGICAL ACTIVITY OF A SERIES OF NAPHTHYL ACIDS

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Abstract
An homologous series of ω-naphthyl, aliphatic acids from the acetic to the hexoic has been presented to the author by Dr. R. H. Manske, and the physiological activity of these has been determined by the rooting response of plant cuttings treated with solutions of each. Statistically significant positive effects have been noted on the number of cuttings that rooted, the number and length of roots per rooted cutting, and the mean root length. The results with several plant species indicate that activity exists up to and including naphthyl hexoic acid, the highest member of the series tested. A noteworthy feature of the results is the activity of the acids with an even number of carbon atoms in the side chain; those with an odd number have activity of a lower order.

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