Assertion: impurity | /r/HasAspect | stronger effects
Facets:
value: on the cultured cells
type: LOCATION
value: within a serum-free medium
type: LOCATION
Source sentences:
text: and/or protein quality.2 In fact, within a serum-free medium, these impurities may have stronger effects on the cultured cells because of a lack of toxin-neutralizing activity.3