Assertion: kelp's level | /r/HasProperty | no viability
Facets:
Source sentences:
text: Viability of the gametophytic cells was assessed at days 10, 24, and 35 post-thawing on the basis of five levels of culture viability (no viability; 1%–20% viability; 20%–50% viability; 50%–80% viability; and >80% viability) by light microscope (Leica Labovert inverted microscope or Zeiss Axiovert 200).