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Table 2 Concentrations (μM) of imidazoles and pyrazines (estimated) and aromatic degradation products in pretreated biomass hydrolysates

From: Inhibition of microbial biofuel production in drought-stressed switchgrass hydrolysate

  Corn stover 36H56 Corn stover P0448R Switchgrass
2010 2012 2012 2013 2010 2012 2013
1-Methylimidazole 2 0 ND 0 1 1 5
2-Methylimidazole 26 42 33 44 45 137 37
4(5)-Methylimidazole 67 86 214 264 76 356 60
2,4-Dimethylimidazole 13 14 36 49 5 6 12
2-Methylpyrazine 4 6 11 10 14 114 10
2,5-Dimethylpyrazine 0 0 1 1 1 9 1
2,6-Dimethylpyrazine 1 1 4 4 3 38 2
Sum of imidazoles and pyrazines 112 150 299 371 144 661 126
Acetamide 7755 7114 8283 8309 8888 11,372 8981
Coumaroyl amide 5034 3152 3763 4502 1622 1751 1908
Feruloyl amide 2044 1529 2181 2186 593 1179 753
Coumaric acid 1328 489 774 937 225 268 257
Benzoic acid 132 168 121 124 304 225 300
Vanillin 181 141 156 146 71 69 86