Abstract

The design and use of a unit for planting uniform inocula for replicate cultures are described. Its design permits continuous gassing of suspensions of mammalian cells with humidified CO2, thus stabilizing the pH (±<0.05 pH unit) of culture media buffered with sodium bicarbonate. The unit can be readily modified to deliver different volumes; identical samples can be dispensed simply and rapidly, with minimal cell damage and chance of microbial contamination. Quantitative data regarding sample uniformity and growth subsequent to planting with this unit are presented.

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