Nanomaterial effects on C. elegans lifespan

Nanomaterial: CeO2: Cerium oxide nanopowder
Concentration: 2.08 µg/cm² (dispersant: DI water).
Control: DI Water
Test Method

Trial 1
  Worm lifespan
average (normalized)
S.D. n p value
(LogRank test)
Control 1 0.28 160 -
Nanomaterial 1.02 0.29 182 0.42
Trial 2
  Worm lifespan
average (normalized)
S.D. n p value
(LogRank test)
Control 1 0.29 1564 -
Nanomaterial 0.91 0.31 72 0.064
Trial 3
  Worm lifespan
average (normalized)
S.D. n p value
(LogRank test)
Control 1 0.31 1211 -
Nanomaterial 1.11 0.32 135 0.00046
Trial 4
  Worm lifespan
average (normalized)
S.D. n p value
(LogRank test)
Control 1 0.31 1090 -
Nanomaterial 1 0.35 62 0.69