Fig. 6.

Effects of simulated diving and heat shock on intracellular glutathione level of HUVEC. The cells were exposed according to exposure design 2. The cells were harvested 24 h after heat shock and analyzed for reduced (GSH red) and total glutathione (GSH total). The results are expressed as equivalents of GSH per 10⁶ cells and represent the average of three separate dishes ± SD. a P < 0.001 vs. control; b P = 0.003 vs. control; c P < 0.001 vs. dive 2 h; d P < 0.001 vs. dive 24 h