. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. EFFECT OF pH OX GROWTH OF EUGLENA 393 material from three different samples of Difco Tryptophane Broth, one of which was lighter in color and much more readily soluble than the other two, and of two samples of Difco Tryptophane Broth which had been subjected to peptic and tryptic digestion. One of these had been digested by pepsin for two days and by trypsin for two days: the other had been digested by pepsin for two days and by trypsin for four days. These two mixtures and the three samples of Difco Tryptophane Broth 30 20
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. EFFECT OF pH OX GROWTH OF EUGLENA 393 material from three different samples of Difco Tryptophane Broth, one of which was lighter in color and much more readily soluble than the other two, and of two samples of Difco Tryptophane Broth which had been subjected to peptic and tryptic digestion. One of these had been digested by pepsin for two days and by trypsin for two days: the other had been digested by pepsin for two days and by trypsin for four days. These two mixtures and the three samples of Difco Tryptophane Broth 30 20 10. 34 5 6 7 8 9 Pri FIG. 1. Graph showing the results of Series I and II. The concentration of organisms in thousands per cc. (C) is plotted against pH. Each point represents the average of the concentrations of organisms in two or three tubes of the same pH value. were mixed in approximately equal amounts. The stock solution of the medium was made up at pH , and then each sample was titrated to the desired pH value by the addition of normal HC1 or normal NaOH. The initial concentration after inoculation was .1 thousand per cc., and the pH range was to The concentrations of organisms were determined at the end of nine days. The data obtained are shown in Fig. 2. It is apparent that the organisms grew more rapidly. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
