Words similar to factor-free

Example sentences for: factor-free

How can you use “factor-free” in a sentence? Here are some example sentences to help you improve your vocabulary:

Medium was then removed once again and fresh serum- and growth factor-free medium was applied.
Once 90% confluency was reached, the medium was changed and the cultures were maintained in serum- and growth factor-free conditions (EBM-2 medium) for 24 h.