[1] TESTING UNDER OSMOTIC WELLING [HYPEROSMOLAR SOLUTION CELLS ABSORB WATER/THE DEAD DO NOT ABSORB ABD DORS NOT SWELL] [2] MEASUREMENT ATP [PURE REASON RESEARCH] [3] EXCLUSION CHROSTINIS [A] EOSIN [ABSORBED BY DEAD CELLS] [B] NIGROSINE [CONTRASTING TINT] [C] TRYPAN BLUE [PRINCIPLE SIMILAR TO THE EOSIN]