This month's cover showing strikingly colored
fall foliage is related to the article Chem-Is-Tree,
by Dana M. Barry, and to JCE Classroom Activity:
#2. Barry provides interesting and useful information about trees,
their constituent substances, and the many uses we make of those substances.
This month's JCE Classroom Activity deals with anthocyanins, the substances
that produce the beautiful reds and purples of fall foilage, and the
colors of many flowers and vegetables as well. Red-cabbage indicator
is one example of a practical application of anthocyanins, and many
others are explored in this month's activity. Extracting ground-up
petunia petals with isopropyl alcohol, for example, produces an indicator
solution..
Cover design by Nina Hofstadler of The Design
Consortium, Richland, WA.
Cover designed by Betsy True.
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