Fig. 2
From: Removal of fermentation inhibitors from pre-hydrolysis liquor using polystyrene divinylbenzene resin
Effects of the acid concentration (a), temperature (b), and reaction time (c) of acid hydrolysis on xylose production [(a: temperature: 100 °C; time: 60 min), (b: acid concentration: 4%; time: 60 min), (c: acid concentration: 4%; temperature: 100 °C)]; ns denotes no significant difference, * denotes p < 0.05, ** denotes p < 0.01 and *** denotes p < 0.001, **** denotes p < 0.0001