Fig. 5
From: Marine cyanobacterial biomass is an efficient feedstock for fungal bioprocesses

Hydroxymethyl furfural concentration and production of citric acid by the A. tubingensis cultures in CBH. A Hydroxymethyl furfural (HMF) concentration in CBH prepared and 1 N HCl or HNO3 and reduction through treatment with activated charcoal. B Consumption of glucose and xylose and release of citric acid by A. tubingensis grown in different media for 5 days. Control refers to the HR medium. HCl and HNO3 represent cultures in CBH prepared in HCl and HNO3, respectively while HCl-Char and HNO3-Char represent the cultures in CBH prepared in HCl or HNO3, which was further treated with activated charcoal. Three replicates were performed (n = 3). * represents a statistically significant difference (p < 0.05) in the consumption of glucose or xylose or the production of citric acid in Aspergillus tubingensis cultures performed in cyanobacterial biomass hydrolysate-based media with respect to that in control medium