Figure 3
Diagram summarising industrial and yeast-produced CO 2 concentrations measured at different distances of a MM-X trap. Blue circle: 400-500 ppm; green rectangular: 500-600 ppm; red triangle: > 600 ppm; 1, 2 and 4: 1½, 25½ and 49½ h post mixing the yeast-sugar solution (17.5 g yeast+250 g sugar+2½ L water in each 5 L bottle); C: industrial CO2 (5%, 250 ml/min); A: all (yeast-produced and industrial) CO2 sources.