## 3 Results
### Profiles of Volatile Compounds Generated by Different FAs
\begin{table}
\begin{tabular}{c c c c c} \hline \hline \multirow{2}{*}{**Number**} & \multirow{2}{*}{**Compounds**} & \multicolumn{3}{c}{**Concentration of Volatile Compounds (ug/L)**} \\ \cline{3-5}  & & **Blank** & **C16.0** & **C18:2n6c + LOX** \\ \hline
1 & 2,4-Nonadienal, (E,E)- & 0.00 \(\pm\) 0.00 a & 9.54 \(\pm\) 1.12 b & 11.51 \(\pm\) 2.21 b \\
2 & 2,4-Decadienal, (E,E)- & 0.00 \(\pm\) 0.00 a & 11.72 \(\pm\) 1.49 b & 9.88 \(\pm\) 0.42 b \\
3 & Heptanal & 0.00 \(\pm\) 0.00 a & 0.00 \(\pm\) 0.00 a & 45.13 \(\pm\) 4.84 b \\
4 & Hexanal & 0.00 \(\pm\) 0.00 a & 21.95 \(\pm\) 1.36 b & 35.72 \(\pm\) 1.43 c \\
5 & Nonanal & 0.00 \(\pm\) 0.00 a & 18.75 \(\pm\) 1.52 b & 32.04 \(\pm\) 3.54 c \\
6 & Heptanal & 0.00 \(\pm\) 0.00 a & 27.94 \(\pm\) 1.99 b & 32.41 \(\pm\) 1.80 c \\
7 & 2-Heptanone & 0.00 \(\pm\) 0.00 a & 44.29 \(\pm\) 1.71 b & 57.96 \(\pm\) 5.78 c \\
8 & 1-Butanone, 1-phenyl- & 0.00 \(\pm\) 0.00 a & 15.66 \(\pm\) 0.76 b & 16.71 \(\pm\) 1.68 b \\
9 & 1-Pentanone, 1-phenyl- & 0.00 \(\pm\) 0.00 a & 16.90 \(\pm\) 1.29 b & 18.28 \(\pm\) 1.21 b \\
10 & 3-Nonenoic acid, methyl ester & 0.00 \(\pm\) 0.00 a & 11.56 \(\pm\) 0.57 b & 11.40 \(\pm\) 0.69 b \\
11 & Propane, 1,3-diiodo- & 0.00 \(\pm\) 0.00 a & 0.00 \(\pm\) 0.00 a & 10.56 \(\pm\) 1.02 b \\
12 & Benzene, hexyl- & 0.00 \(\pm\) 0.00 a & 10.44 \(\pm\) 1.49 b & 9.59 \(\pm\) 0.83 b \\
13 & Benzene, (2-methyl-1-propenyl)- & 0.00 \(\pm\) 0.00 a & 0.00 \(\pm\) 0.00 a & 20.51 \(\pm\) 1.31 b \\
14 & 3,4-Octadiene, 7-methyl- & 0.00 \(\pm\) 0.00 a & 0.00 \(\pm\) 0.00 a & 7.29 \(\pm\) 0.06 b \\
15 & Benzene, 1-methyl-3-phenoxy- & 0.00 \(\pm\) 0.00 a & 4.28 \(\pm\) 0.30 b & 4.10 \(\pm\) 0.31 b \\
16 & Hex-enylbenzene & 0.00 \(\pm\) 0.00 a & 8.48 \(\pm\) 0.67 b & 8.54 \(\pm\) 0.51 b \\
17 & trans-1-Phenyl-1-pentene & 0.00 \(\pm\) 0.00 a & 24.22 \(\pm\) 4.07 c & 12.20 \(\pm\) 1.16 b \\
18 & Benzene, 1-butenyl-, (E)- & 0.00 \(\pm\) 0.00 a & 21.49 \(\pm\) 1.50 b & 25.58 \(\pm\) 0.53 c \\
19 & Undecanoic acid, methyl ester & 0.00 \(\pm\) 0.00 a & 1.34 \(\pm\) 0.10 b & 0.00 \(\pm\) 0.00 a \\
20 & Hexane & 0.00 \(\pm\) 0.00 a & 25.59 \(\pm\) 3.29 b & 29.25 \(\pm\) 2.97 b \\
21 & Benzene, propyl- & 0.00 \(\pm\) 0.00 a & 103.56 \(\pm\) 1.87 b & 104.14 \(\pm\) 24.79 b \\
22 & Benzene, butyl- & 0.00 \(\pm\) 0.00 a & 142.03 \(\pm\) 16.54 b & 151.74 \(\pm\) 23.26 b \\
23 & 1-Hexanone, 1-phenyl- & 0.00 \(\pm\) 0.00 a & 12.64 \(\pm\) 1.89 b & 10.64 \(\pm\) 0.63 b \\
24 & Benzene, pentyl- & 0.00 \(\pm\) 0.00 a & 60.71 \(\pm\) 9.13 b & 60.28 \(\pm\) 7.18 b \\
25 & Nonanoic acid, 9-oxo-, methyl ester & 0.00 \(\pm\) 0.00 a & 28.34 \(\pm\) 7.52 b & 0.00 \(\pm\) 0.00 a \\
26 & Methyl 8-(2-furyl) octanoate & 0.00 \(\pm\) 0.00 a & 0.00 \(\pm\) 0.00 a & 1.38 \(\pm\) 0.10 b \\
27 & 2-Heptenoic acid, methyl ester & 0.00 \(\pm\) 0.00 a & 2.30 \(\pm\) 0.10 b & 0.00 \(\pm\) 0.00 a \\
28 & Benzenebutanoic acid, methyl ester & 0.00 \(\pm\) 0.00 a & 2.77 \(\pm\) 0.43 b & 2.93 \(\pm\) 0.06 b \\
29 & 6-Nonenoic acid, methyl ester & 0.00 \(\pm\) 0.00 a & 17.55 \(\pm\) 2.01 b & 0.00 \(\pm\) 0.00 a \\
30 & 7,10-Octadecienoic acid, methyl ester & 0.00 \(\pm\) 0.00 a & 26.53 \(\pm\) 3.03 b & 21.76 \(\pm\) 2.37 b \\
31 & 8,11-Octadecienoic acid, methyl ester & 0.00 \(\pm\) 0.00 a & 819.49 \(\pm\) 33.99 b & 891.94 \(\pm\) 81.73 b \\
32 & 9,11-Octadecienoic acid, methyl ester, & 0.00 \(\pm\) 0.00 a & 27.65 \(\pm\) 1.47 b & 0.00 \(\pm\) 0.00 a \\
33 & Nonanoic acid, 9-oxo-, methyl ester & 0.00 \(\pm\) 0.00 a & 0.00 \(\pm\) 0.00 a & 36.41 \(\pm\) 3.08 b \\
34 & 10-Undecenoic acid, methyl ester & 0.00 \(\pm\) 0.00 a & 14.56 \(\pm\) 1.28 b & 13.55 \(\pm\) 0.63 b \\
35 & Heptanoic acid, methyl ester & 0.00 \(\pm\) 0.00 a & 256.79 \(\pm\) 18.02 b & 0.00 \(\pm\) 0.00 a \\
36 & Decanoic acid, methyl ester & 0.00 \(\pm\) 0.00 a & 7.14 \(\pm\) 0.30 b & 36.28 \(\pm\) 0.94 c \\
37 & Hexanoic acid, methyl ester & 0.00 \(\pm\) 0.00 a & 125.36 \(\pm\) 3.80 b & 128.35 \(\pm\) 1.96 b \\
38 & Nonanoic acid, methyl ester & 0.00 \(\pm\) 0.00 a & 39.41 \(\pm\) 1.31 b & 41.12 \(\pm\) 2.68 b \\
39 & 9,12-Octadecienoic acid, methyl ester, & 0.00 \(\pm\) 0.00 a & 28.09 \(\pm\) 2.09 b & 32.94 \(\pm\) 4.59 b \\
40 & Methyl tetradecaoate & 6.71 \(\pm\) 0.20 b & 0.00 \(\pm\) 0.00 a & 13.76 \(\pm\) 2.284.5 Changes in the Contents of Volatile Compounds Produced from C20:4 and LOX-Induced 20:4 Oxidation  
The concentrations of volatile compounds produced by C20:4 treated with LOX was 2100.93 \(\mathrm{\SIUnitSymbolMicro g}\)/L, which was 1.29 times higher than without LOX treatment, indicating that LOX enhanced the oxidative degradation of C20:4 (Table 6).