## 2 Results and Discussion
### Profiles of Aldehyde Compounds
\begin{table}
\begin{tabular}{c c c c c c c c c c c c c} \hline \hline \multicolumn{1}{c}{**No.**} & **Volatile Compound** & **Chemical Formulas** & **RT (min) \({}^{1}\)** & **RI \({}^{2}\)** & **RI \({}^{3}\)** & **Method \({}^{4}\)** & **Ratio of \(L\). defined/subsp. budget/s to \(S\). demographics (ugIU)** \\ \hline  & & & & & & & & & & & \\ \hline  & & & & & & & & & & & & \\ \hline
1 & Accidentaldehyde & C\({}_{\rm CH}\)O & 1.26 & - & - & MS,STD & 6.86 & 7.11 & 7.77 & 11.15 & 14.33 & - \\
2 & 3-HydroxyMetanal & C\({}_{\rm CH}\)O & 2.37 & 605 & - & MS & 1.33 & 2.39 & 1.16 & 6.96 & 5.46 \\
3 & 3-Methyl-Metanal & C\({}_{\rm CH}\)O & 2.82 & 609 & 634 & MS,RI & - & 5.55 & 5.38 & 8.23 & 7.80 & 5.31 \\
4 & Portland & C\({}_{\rm CH}\)O & 3.19 & 668 & 646 & MS,RI & - & 3.02 & 1.36 & 1.07 & - \\
5 & (E)-2-Potential & C\({}_{\rm CH}\)O & 5.14 & 753 & 754 & MS,RI & - & 3.89 & 1.27 & 5.44 & - \\
6 & Hexanal & C\({}_{\rm CH}\)O & 5.41 & 768 & 799 & MS,RI & - & 1.43 & 1.29 & 2.51 & 5.20 & 1.24 \\
7 & (E)-2-Hexanal & C\({}_{\rm CH}\)O & 8.35 & 848 & 848 & MS,RI & 2.58 & 2.01 & 1.95 & 2.29 & - & - \\
8 & Hepanaldehyde & C\({}_{\rm CH}\)O & 8.86 & 857 & 860 & MS,RI & 1.55 & 1.95 & 1.86 & 1.86 & 2.23 & - \\
9 & Benzaldehyde & C\({}_{\rm CH}\)O & 11.77 & 932 & 933 & MS,RI & - & - & 0.31 & - & - & 3.05 \\
10 & (E)-2-Hepanal & C\({}_{\rm CH}\)O & 12.28 & 953 & 953 & MS,RI & 3.82 & - & - & - & - & 0.23 \\
11 & (E)-2-Hepanal & C\({}_{\rm CH}\)O & 14.23 & 1006 & 1007 & MS,RI & - & 1.32 & - & - & - & - \\
12 & (E)-2-Oxental & C\({}_{\rm CH}\)O & 15.82 & 1054 & 1055 & MS,RI & 1.26 & - & 0.32 & - & - & - \\
13 & Normal & C\({}_{\rm CH}\)O & 16.85 & 1085 & 1086 & MS,RI & 2.92 & 0.25 & 0.31 & 0.30 & 0.86 & 1.22 \\
14 & (E)-2-Normal & C\({}_{\rm CH}\)O & 19.03 & 1155 & 1157 & MS,RI & 3.93 & - & - & - & - \\
15 & Decanal & C\({}_{\rm CH}\)O & 19.91 & 1184 & 1185 & MS,RI & 1.93 & - & - & - & 0.67 & - \\
16 & (E)-2-Decanal & C\({}_{\rm CH}\)O & 22.01 & 1257 & 1252 & MS,RI & 1.26 & - & - & - & - \\ \hline \multicolumn{1}{c}{**Kotone Compounds**} & & & & & & & & & & \\ \hline
17 & 2-Juthenoting & C\({}_{\rm CH}\)O & 2.25 & - & - & MS,STD & - & 1.06 & 2.11 & 2.33 & 2.13 & 5.88 \\
18 & 2-Juthenoting & C\({}_{\rm CH}\)O & 2.97 & 651 & 633 & MS,RI & - & - & 3.89 & 1.67 & 5.27 & 5.04 \\
19 & 3-Methyl-2-butanone & C\({}_{\rm CH}\)O & 3.01 & 654 & MS,RI & 1.65 & 3.26 & 3.45 & 4.21 & 5.28 & 2.61 \\
20 & 1-Jthydroxy-2-propionate & C\({}_{\rm CH}\)O & 3.33 & 679 & 674 & MS,RI & - & 5.23 & & - & - \\
21 & 2-Acretion & C\({}_{\rm CH}\)O & 3.42 & 668 & - & MS,STD & - & - & - & - & - \\
22 & 3-Methyl-2-butanol & C\({}_{\rm CH}\)O & 5.35 & 700 & - & MS & - & - & - & - & 4.30 \\
23 & 2-HGenome & C\({}_{\rm CH}\)O & 9.23 & 871 & 863 & MS,RI & 2.79 & 9.00 & 17.18 & 11.27 & - & -5.26 & 2.78 \\
24 & 5-Methyl-3-hyperonon & C\({}_{\rm CH}\)O & 12.43 & 957 & 962 & MS,RI & 1.31 & - & 0.25 & 0.18 & - & - \\
25 & 2-Jtosyl-1-butanol & C\({}_{\rm CH}\)O & 15.29 & 1083 & - & MS,RI & - & 0.25 & 0.18 & - & - \\
26 & 2-ClClipheripher++hydroxy- & C\({}_{\rm CH}\)O & 16.48 & 1002 & 1000 & MS,RI & - & 0.53 & - & - & - \\
27 & 2-Nuclear & C\({}_{\rm CH}\)O & 16.45 & 1071 & 1070 & MS,RI & 14.04 & 2.11 & 5.40 & 5.84 & 10.67 & 6.77 \\
28 & 2-Dihydro-3-hydroxy-+ & C\({}_{\rm CH}\)O & 18.56 & 1140 & 1149 & MS,RI & - & 0.70 & - & - & - \\  & 29 & 3-Dihydro-2-Allowance & C\({}_{\rm CH}\)O & 22.48 & 1273 & 1273 & MS,RI & 1.84 & 0.85 & 1.07 & 0.62 & 1.99 & 1.03 \\ \hline \end{tabular}
\end{table} 
Table 1: Volatile compounds produced by milk fermented with different proportions of \(L\). _delbruechal_ subsp. _bulgeries_ IMAU20401 and \(S\). _thermophilus_ ND03. \begin{table}
\begin{tabular}{c c c c c c c c c c c c c} \hline \hline \multirow{2}{*}{No.}