Word: tter
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Life, declared Professor Willstätter at the Chicago symposium, is definitely a chemical process to which the pass key is the study of enzymes. Enzymes are catalytic substances produced by living cells. There are a multitude of them and each has an individual affinity for substances which it can either break down or synthesize...
...Gowland Hopkins devoted his B. A. A. S. presidential address to these vital entities. In Chicago they were the subject of a symposium in which A. C. S. President Arthur Becket Lamb partook, and at which foreign guests of the Society expounded-Munich's Dr. Richard Willstätter on enzymes, Zurich's Dr. Paul Karrer on vitamins, Edinburgh's Dr. George Barger on hormones...
Professor Willstätter's method of segregating enzymes is beautifully simple. The enzymes are colloids. White clay (kaolin) filters absorb certain kinds of colloids, alumina filters certain other kinds. Enzymes, which pass through both alumina and clay filters, have a third set of characteristics. By shrewd use of colloidal physics and chemistry Professor Willstatter segregated the three important enzymes of pancreatic fluid-lipase which acts on fats, amylase which acts on carbohydrates, trypsin which acts on proteins...
...TTER, Sec.20...