Word: thimann
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...discovery was made by Kenneth V. Thimann, Professor of plant physiology, after months of experimentation at the Atkins Institute in Soledad, Cienfuegos, Cuba. The weed apparently eliminated by the experiment is the Aroma marabu weed, which had overgrown large acreages of sugar land on the island and is also a problem to cattle raisers in the region...
...Frederick B. Deknatel (Fine Arts), Rupert Emerson '21 (Government), Merle Fainsod (Government), Edwin Frickey (Economics), Mason Hammond '25 (Greek and Latin, History), Michael Karpovich (History), Donald C. McKay (History), Saunders MacLane (Mathematics), Arthur T. Merritt (Music), Jean-Joseph Seznee (Romance Languages and Literatures), Jabez C. Street (Physics), Kenneth V. Thimann (Biology), Bartlett J. Whiting '25 (English), John D. Wild (Philosophy), Donald C. Williams (Philosophy), and E. Bright Wilson, Jr. (Chemistry...
Controlled Growth. After a few days, the seedlings have ghost-white roots and little white spikes (the coleoptiles) which envelop the embryo leaves. Thimann cuts off the coleoptiles, trims their points, and strings the tiny hollow cylinders on the hairlike teeth of a comb. Then he puts them in water containing a little sugar and indoleacetic acid (a growth-promoting substance). He measures them under a microscope and tucks them away in darkness...
...cells grow for a day or so, "eating" the sugar and acid. They grow in isolation, uninfluenced by the complex substances which would normally reach them from the oat seed. Professor Thimann can experiment on them, and know what he is doing...
...recent experiment was to put a "growth inhibitor" (iodoacetic acid) in the water. It did not kill the cells, but stopped their growth by breaking a necessary chain of chemical reactions. Then, one after another, Thimann added likely compounds, hoping to see growth start again. He found that malic acid (which is found in apples) would overbalance the evil influence of iodoacetic acid, allowing the cells to grow. This proved that malic acid was somehow involved in the chain of reactions which the inhibitor had broken...