TABLE 2.
Compositions of the four hop solutions used in this study and modifications introduced into the medium to normalize the hop iso-α-acid stress level
| Solution | Total iso-α-acids (g liter−1) | Individual iso-α-acid concn (g liter−1)a |
% (concn [g liter−1]) |
Amt (μl) for 100 ml medium 0.2 g liter−1 total iso-α-acidsb | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| TIC | CIC | TIH | CIH | TIA | CIA | cis-iso-α-acids | trans-iso-α-acids | |||
| Iso-α-acid-enriched hop extract | 160 | 14.7 | 38.2 | 24.3 | 62.4 | 5.6 | 14.6 | 64 (102.4) | 28 (44.8) | 135 |
| Purified hop extract | 175.9 | 14.7 | 39.0 | 26.9 | 73.3 | 5.9 | 16.1 | 72 (126.7) | 27 (47.5) | 120 |
| cis-enriched fraction | 75.6 | 3.3 | 15.7 | 5.1 | 39.1 | 1.1 | 8.3 | 86 (62.4) | 13 (9.4) | 220 |
| trans-enriched fraction | 18.5 | 44.9 | 2.8 | 10.8 | 22.1 | 5.9 | 1.2 | 14 (2.6) | 86 (15.9) | 370 |
a
Abbreviations: TIC, trans-isocohumulone; CIC, cis-isocohumulone; TIH, trans-isohumulone; CIH, cis-isohumulone; TIA, trans-isoadhumulone; CIA, cis-isoadhumulone.
b
cis, 0.14 g liter−1; trans, 0.06 g liter−1.