centrifuged, washed, dried, weighed, and analyzed for radioacitvity. The dead cells of Chlorella, with no added salts and at all levels of potassium (i), were found to concentrate Cs137 by a factor varying from 35 to 68; the variations appeared to be random. In mixtures containing stable cesium, (ii) and (iii), the concentration factor varied around 1-that is, the algal cell bodies contained the same amount of Csl37 as did an equal amount of the medium.These results suggest that structural components persist in dead Chlorella which adsorb cesium from very dilute solutions and that this adsorption is not affected by the concentration of potassium in the medium. From these data it may be inferred that, in killed cells of Chlorella, potassium and cesium behave independently, but that in live cells of Chlorella and Euglena, particularly at tracer levels of potassium, ions of potassium and cesium form a metabolic pool.During the administration of warfarin (Coumadin) sodium, or 3-(a-acetonylbenzyl) -4-hydroxycoumarin sodium, to patients with coronary thrombosis and other forms of thromboembolic disease, Livesay (1) noticed improvement in the asthmatic condition of several patients who had bronchial asthma in addition to the thromboembolic involvement. This observation prompted us to look for a centrifuged, washed, dried, weighed, and analyzed for radioacitvity. The dead cells of Chlorella, with no added salts and at all levels of potassium (i), were found to concentrate Cs137 by a factor varying from 35 to 68; the variations appeared to be random. In mixtures containing stable cesium, (ii) and (iii), the concentration factor varied around 1-that is, the algal cell bodies contained the same amount of Csl37 as did an equal amount of the medium.These results suggest that structural components persist in dead Chlorella which adsorb cesium from very dilute solutions and that this adsorption is not affected by the concentration of potassium in the medium. From these data it may be inferred that, in killed cells of Chlorella, potassium and cesium behave independently, but that in live cells of Chlorella and Euglena, particularly at tracer levels of potassium, ions of potassium and cesium form a metabolic pool.
