Fig. 7 Solution state NMR spectra of anaerobically degraded ¹³C–glucose in samples after four weeks of incubation. Assignments are presented in Table 2. A, control sample with addition of 10 mM ¹³C–glucose just before the NMR analysis; B, 15°C and pH 4.3; C, 25°C and pH 4.3; D, 15°C and pH 6.8; E, 25°C and pH 6.8. Note that the scale of relative intensity is magnified in E and D

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