Dry, finely divided plant and animal tissues were oxidized by passage over hot copper oxide; the aqueous condensates were first distilled from potassium permanganate and then alone. If necessary, oxidation and distillation were repeated until there was no significant change in density. Densities were determined by a modification of the submerged magnetic float procedure, and the accuracy was one part per million. The specimens examined were practically all of the chief organs of cattle; yeasts; dairy products; and some parts of plants like corn and melons. The study is being extended to other biological specimens, normal and pathological.
Proceedings of the Iowa Academy of Science
©1935 Iowa Academy of Science, Inc.
Keil, H. L.; Ralston, A. W.; Kelley, M. T.; Catlin, W. E.; Jennings, W. H.; Straley, J.; and Gilman, H.
"Heavy Water Obtained by the Combustion of Dried Biological Specimens,"
Proceedings of the Iowa Academy of Science, 42(1), 122-122.
Available at: https://scholarworks.uni.edu/pias/vol42/iss1/47