Environmental conditions at four positions in the laboratory recorded during the reaction progress of lipase-catalysed ester hydrolysis. Experiments with 0 bead (a-c); 10 beads (d-f); 20 beads (g-i); and (j-l) 30 beads of lipase. Data from alcohol sensors (a,d,g,j), temperature sensors (b,e,h,k) and humidity sensors (c,f,i,l), placed at four different positions in the laboratory (solvent storage cabinet (black line); sink (red line); fume hood (blue line); working bench (green line)). (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)