Respiratory Inhibition in Chlorella Produced by "Purified" Polyethylene Glycol 1540

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Science  01 Mar 1968:
Vol. 159, Issue 3818, pp. 984-985
DOI: 10.1126/science.159.3818.984


Polyethylene glycol 1540, added to culture solution in amounts sufficient to reduce the water potential to -10 atmospheres, inhibited respiration in Chlorella much more than mannitol solutions at -10 atmospheres. This occurred despite the purification of the polyethylene glycol by passage through exchange columns. The toxic properties, which developed some time after purification, increased with time of storage of solutions of polyethylene glycol 1540 at room temperature.