## 3 Results and Discussion
\begin{table}
\begin{tabular}{l c c c c c c c c c} \hline \hline
**Compound** & **Threshold (ug. L\({}^{-1}\))** & **Ref.** & \multicolumn{4}{c}{**Concentration in Tea Infusion (ug. L\({}^{-1}\))**} & \multicolumn{4}{c}{**OAV**} \\ \cline{2-10}  & & & **Green Traa** & **Oalong Tosa** & **Black Traa** & **Green Traa** & **Oalong Tosa** & **Black Traa** \\ \hline \(\beta\)-cs-cinference & 34 & [24] & 2.0 & 5.1 & 1.0 & \(<\)l & 0\(<\)l & \(<\)l \\ \(\chi\)-threshold-code & 320 & [25] & 2.4 & 5.3 & 8.2 & \(<\)l & \(<\)l & \(<\)l \\ (standard) & 320 & [25] & 2.7 & 6.1 & 17.2 & \(<\)l & \(<\)l & \(<\)l \\ trans-linked code & 320 & [25] & 2.7 & 6.1 & 17.2 & \(<\)l & \(<\)l & \(<\)l \\ (Lundel) & 1 & [24] & 4.6 & 8.9 & 21.3 & 4.6 & 8.9 & 21.3 \\ Hattenod & 110 & [24] & nd & 18.9 & nd & \(<\)l & \(<\)l & \(<\)l \\ (L-A)- & dimethylhom-1,3/- & rf & & 2.8 & nd & nd & rf & rf & rf \\ \(\beta\)-Hier & Berry traffic & 1000 & [25] & 3.3 & 9.3 & nd & \(<\)l & \(<\)l & \(<\)l \\ (\(\beta\)-S)-havenly & 500 & [24] & 5.4 & nd & 4.4 & \(<\)l & \(<\)l & \(<\)l \\ trans-linked code & 0.025 & [27] & nd & nd & 8.2 & \(<\)l & \(<\)l & \(<\)l & \(328.0\) \\ Dodecane & rf & & nd & 4.4 & 2.8 & nd & rf & rf \\ Methyl salicylate & 40 & [25] & 1.5 & nd & 9.0 & \(<\)l & \(<\)l & \(<\)l \\ \(\beta\)-2-dimethyl-3/- & 89 & & nd & 5.2 & nd & \(<\)l & \(<\)l & \(<\)l \\ (\(\beta\)-H)eyl-butanoate & 607 & [29] & nd & 3.8 & 1.6 & \(<\)l & \(<\)l & \(<\)l \\ \(\alpha\)-methyl-butanate & rf & & nd & 2.3 & rf & rf & rf & nd \\ Heeyl-2-methyl & rf & & nd & nd & 2.2 & rf & rf & rf & rf \\ (\(\beta\)-H)-gaard & 1.1 & [20] & 2.8 & nd & nd & 2.6 & \(<\)l & \(<\)l \\ \(\beta\)-3,b/b/b/b-1.1 & 81 & & nd & 3.9 & nd & \(<\)l & \(<\)l & \(<\)l \\ \(\beta\)-2-dihydro-2.5 & & & nd & 5.5 & nd & \(<\)l & \(<\)l & \(<\)l \\ \(\beta\)-Hobedo & 1 & [31] & 14.7 & 35.3 & nd & 14.7 & 35.2 & \(<\)l \\ \(\beta\)-3-havenly & 16 & [25] & 5.1 & nd & nd & \(<\)l & \(<\)l & \(<\)l \\ trans-2-havenly & & & & & & & & & \\ \(\beta\)-Havenote & 781 & [32] & 4.7 & 9.1 & 10.1 & \(<\)l & \(<\)l & \(<\)l \\ Heeyl hexomote & 820 & [32] & 1.1 & 5.6 & 3.9 & \(<\)l & \(<\)l & \(<\)l \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Aroma contents from tea infusion and odor-activity value (OAV) of green tea, oelong tea, and black tea. \begin{table}
\begin{tabular}{c c c c c c c c c} \hline \hline \multirow{2}{*}{**Compound**} & \multirow{2}{*}{**Threshold (log. L\({}^{-1}\))**} & \multirow{2}{*}{**Ref. **} & \multicolumn{4}{c}{**Concentration in Ten Infusion (log. L\({}^{-1}\))**} & \multicolumn{2}{c}{**OAV**} \\ \cline{3-10}  & & & **Green Tas** & **Ouding Tas** & **Black Tas** & **Green Tas** & **Ouding Tas** & **Black Tas** \\ \hline unknown 4 & rf & & nd & nd & 2.0 & nf & nf & nf \\ de-ls-lance & 1.9 \begin{tabular}{c c c c c c c c c} \hline \hline  & & & & & & & & \\ \hline \multirow{2}{*}{**Compound**} & **Threshold (ug.** & \multirow{2}{*}{**Ref.**} & \multicolumn{3}{c}{**Concentration in Tea Infusion (ug. L\({}^{-1}\))**} & \multicolumn{3}{c}{**OAV**} \\ \cline{3-10}  & & & **Green Tea** & **Oolog Tea** & **Black Tea** & **Green Tea** & **Oolog Tea** & **Black Tea** \\ \hline E-2-hevenyl & rf & & & nd & nd & 1.2 & nf & nf & nf \\ benzoate & rf & & nd & nd & 0.9 & \(<\)1 & \(<\)1 & \(<\)1 \\ Methyl jasome & 70 & [38] & nd & nd & 0.9 & \(<\)1 & \(<\)1 & \(<\)1 \\ cis-3-hevenyl & rf & & 0.9 & nd & nd & nf & nf & nf \\ 1-tetadecan & 5000 & [37] & 20.8 & nd & nd & \(<\)1 & \(<\)1 & \(<\)1 \\ e-cadinol & nf & & 1.7 & nd & nd & nf & nf & nf \\ Neophytoidene & rf & & 1.4 & 2.6 & 8.3 & nf & nf & nf \\ Hexadecan & 75 & [25] & nd & nd & 1.1 & \(<\)1 & \(<\)1 & \(<\)1 \\ Caffeine & 29/000 & [39] & 17.0 & 28.3 & 18.8 & \(<\)1 & \(<\)1 & \(<\)1 \\ n-hexadecan & 1000 & [25] & 1.8 & 2.3 & nd & \(<\)1 & \(<\)1 & \(<\)1 \\ \hline \multicolumn{10}{c}{nd: not detected; nf: not found.} \\ \end{tabular}