Time % viability (Mean [SD])
NC Coe-Pak extracts Reso-Pac extracts PC
Day 1 Day 3 Day 7 Day 1 Day 3 Day 7
24 h 100 (4.1) 92.9 (3.5) 11.5 (0.7) 10.5 (1) 110.5 (0.6) 92.5 (4.8) 71.3 (3.1) 10.1 (0.6)
72 h 100 (0.6) 93.6 (5.8) 10 (0.5) 12.2 (0.2) 114.7 (3.5) 96.8 (3) 83.6 (2.5) 5.4 (0.4)

SD = standard deviation; NC = negative control (regular culture medium alone; without extracts, no cytotoxicity, 100% viability); PC = positive control (cytotoxic, viability ≤ 10%).