In the hydrolysis of G. amansii (a macroalgae) biomass, increasing
sulfuric acid concentration from 3% to 4% resulted in sharp increases
of glucose decomposition products such as 5-HMF, formic
acid and levulinic acid by 23.6%, 64.7% and 51.2%, respectively
while glucose yield decreased by 12.5% (Jeong et al., 2011)