osmoticum

osmoticum
A chemical agent (e.g. polyethylene glycol, mannitol, glucose or sucrose) employed to maintain the osmotic potential of a nutrient medium equivalent to that of the cultured cells, i.e. the medium and the cells are isotonic. Because of this osmotic equilibrium, cells are not damaged in vitro.

Glossary of Biotechnology for Food and Agriculture . 2015.

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