Incubation in DMEM at 37˚C

2 h pD₂ (Mean ± S.E.)

24 h pD₂ (Mean ± S.E.)

Control (without NE)

8.73 ± 0.11

6.74 ± 0.13

NE 1 × 10^−8.5 M

8.63 ± 0.50

6.36 ± 0.09

NE 1 × 10^−8.0 M

8.78 ± 0.33

6.53 ± 0.06

NE 1 × 10^−7.5 M

8.80 ± 0.47

6.67 ± 0.10

NE 1 × 10^−7.0 M

8.68 ± 0.29

6.65 ± 0.10

NE 1 × 10^−6.5 M

8.14 ± 0.61

6.91 ± 0.12

Average

8.62 ± 0.38

6.64 ± 0.11