Word: rothemund
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Dates: during 1930-1939
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...chlorophyll ring systems, called porphin,* were synthesized by German-born Dr. Paul Wilhelm Karl Rothemund of the C. F. Kettering Founadation† (for study of chlorophyll and photosynthesis) at Antioch College, Yellow Springs, Ohio. Last week at the Milwaukee convention of the American Chemical Society, brilliant young Dr. Rothemund reported that he had finally "activated" chlorophyll in his laboratory. When chlorophyll is heated in certain organic solvents it exhibits chemiluminescence (radiation at low temperatures): gives off "a beautiful red glow." The magnesium or zinc salts of porphyrins also exhibit chemiluminescence when heated in the same manner. Thus chlorophyll not only...
...Paul Wilhelm Karl Rothemund explained that grass is green because out of water and the chemicals of earth it, like all plants, manufactures a colorless substance called proto-chlorophyll. Proto-chlorophyll accumulates in certain cells of leaves called chloroplasts where it comes in contact with carbon dioxide in the air. When the sun is shining a molecule of proto-chlorophyll, stimulated by an atom of magnesium which holds it together, absorbs four quanta of energy from a sunbeam. The extra energy enables the proto-chlorophyll to attract carbon dioxide, kick off the oxygen which it does not require, absorb...
...Rothemund concluded that this was the process of photosynthesis and chlorophyll genesis after he raised an acre of colorless corn in the pitch-dark cellar of the big laboratory building which Antioch College built with Mr. Kettering's money. The extract of white corn leaves turned green when Dr. Rothemund put it in jars of carbon dioxide...
...National Academicians ceased wondering at young Dr. Rothemund's air of authority when they learned that Mr. Kettering had taken him away from Professor Hans Fischer of Munich, Nobel Laureate and supreme authority on the coloring material of leaves and blood. Professor Fischer and Dr. Rothemund are racing neck & neck to make chlorophyll artificially. Just behind them, handicapped by being Harvard University's president, is Chemist James Bryant Conant. "One of us will make the material within a year," said Dr. Rothemund last week...
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