Table 6.
Content of individual phenolic/secoiridoid compounds in non-sterile washing waters (non-enriched or nutrient-enriched) prior and after fermentation at the maximum β-carotene production by B. trispora (fermentation time: 6 days).
| Compound 1 | Concentration (mg/L) 2 | λmax (nm) 3 | FL 4 | ||
|---|---|---|---|---|---|
| 0 d | 6 d (Non-Enriched) | 6 d (Enriched) | |||
| HTyr | 395.7 a ± 18.4 | 131.3 b ± 15.8 | 291.9 c ± 26.1 | 239, 279 | yes |
| Tyr | 173.9 a ± 6.8 | 167.9 a ± 17.6 | 170.1 a ± 13.0 | 239, 275 | yes |
| OME | 102.5 a ± 4.0 | 99.0 a ± 8.4 | 100.8 a ± 7.4 | 241 | no |
| CA | 7.0 a ± 0.3 | 6.7 a ± 0.6 | 6.9 a ± 0.4 | 241, 289, 322 | no |
| LuG | 13.1 a ± 0.6 | 12.5 a ± 1.0 | 12.8 a ± 1.2 | 245, 348 | no |
| CuA | 20.7 a ± 1.0 | not detected | 19.9 a ± 2.0 | 242, 307 | no |
1 HTyr = hydroxytyrosol, Tyr = tyrosol, OME = oleoside-11-methyl ester, CA = caffeic acid, LuG = luteolin-7-O-glucoside, and CuA = p-coumaric acid. 2 Each value was expressed as mean ± standard deviation of three replicates. Different lowercase letters (a, b, and c) in the same row represent significant differences in values (p < 0.05). 3 λmax = maximum absorbance (UV spectra). 4 FL = fluorescence.