. Electrolytes in biological systems, incorporating papers presented at a symposium at the Marine Biological Laboratory in Woods Hole, Massachusetts, on September 8, 1954 . Fig. 4. Radiosulfate uptake by 7\ iililis. Curve \ represents radioactivity of TCA pre- cipitable fraction observed during the growth of the cells shown in Curve B. The ratio A/B shows the direct correlation between growth and sulfur uptake of the TCA precipitable frac- tion (proteins). satisfactory for studies of E. coli permeability, is not necessarily adequate when other organisms are investigated. For T. utilis it is al
. Electrolytes in biological systems, incorporating papers presented at a symposium at the Marine Biological Laboratory in Woods Hole, Massachusetts, on September 8, 1954 . Fig. 4. Radiosulfate uptake by 7\ iililis. Curve \ represents radioactivity of TCA pre- cipitable fraction observed during the growth of the cells shown in Curve B. The ratio A/B shows the direct correlation between growth and sulfur uptake of the TCA precipitable frac- tion (proteins). satisfactory for studies of E. coli permeability, is not necessarily adequate when other organisms are investigated. For T. utilis it is also necessary to measure the radioactivity retained by the cells through metabolic incorpora- tion. Table 6 shows that even when the quantity of sulfur in the medium was low only a slight amount of radioactivity was retained by E. coli. In contrast, T. utilis retained 61 % of the total sulfur originally available. When this meta-
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Keywords: ., bookcentury1900, booksubjectelectrolytes, booksubjectphysiologyc
