## 3 Results and Discussion
### Analysis of Volatile Compounds
#### 3.3.1 Acids
\begin{table}
\begin{tabular}{c c c c c c c} \hline \hline \multirow{2}{*}{**Origin/Compound Acids**} & \multirow{2}{*}{**Batches**} & \multicolumn{4}{c}{**Days of Ripening**} \\  & & **0** & **30** & **45** & **60** & **90** \\ \hline \multirow{4}{*}{Acetic acid} & C & 5.88 \(\pm\) 1.114 \({}^{\text{\text{\tiny{BC}}}}\) & 14.44 \(\pm\) 5.803 \({}^{\text{\text{\tiny{AA}}}}\) & 15.44 \(\pm\) 3.855 \({}^{\text{\text{\tiny{AA}}}}\) & 16.88 \(\pm\) 4.768 \({}^{\text{\tiny{AA}}}\) & 8.54 \(\pm\) 0.059 \({}^{\text{\text{\tiny{AB}}}}\) \\  & Lc & 10.50 \(\pm\) 2.972 \({}^{\text{\tiny{aLC}}}\) & 16.94 \(\pm\) 0.681 \({}^{\text{\tiny{AA}}}\) & 16.36 \(\pm\) 1.638 \({}^{\text{\tiny{AB}}}\) & 14.33 \(\pm\) 3.647 \({}^{\text{\tiny{AB}}}\) & 7.42 \(\pm\) 0.678 \({}^{\text{\tiny{AC}}}\) \\  & Lg & 7.72 \(\pm\) 1.183 \({}^{\text{\tiny{BA}}}\) & 14.58 \(\pm\) 2.117 \({}^{\text{\tiny{AB}}}\) & 16.12 \(\pm\) 6.524 \({}^{\text{\tiny{AA}}}\) & 18.90 \(\pm\) 6.212 \({}^{\text{\tiny{AA}}}\) & 9.25 \(\pm\) 0.356 \({}^{\text{\tiny{AC}}}\) \\ \hline \multirow{4}{*}{Butanoic acid} & C & 1.86 \(\pm\) 4.29 \({}^{\text{\tiny{AB}}}\) & 3.00 \(\pm\) 0.258 \({}^{\text{\tiny{AB}}}\) & 2.97 \(\pm\) 0.406 \({}^{\text{\tiny{BB}}}\) & 2.99 \(\pm\) 0.138 \({}^{\text{\tiny{BB}}}\) & 5.46 \(\pm\) 1.380 \({}^{\text{\tiny{AA}}}\) \\  & Lc & 1.88 \(\pm\) 0.349 \({}^{\text{\tiny{AB}}}\) & 3.14 \(\pm\) 0.143 \({}^{\text{\tiny{AB}}}\) & 2.93 \(\pm\) 0.450 \({}^{\text{\tiny{BA}}}\) & 3.46 \(\pm\) 0.649 \({}^{\text{\tiny{BA}}}\) & 4.90 \(\pm\) 1.446 \({}^{\text{\tiny{AA}}}\) \\  & Lg & 1.95 \(\pm\) 0.615 \({}^{\text{\tiny{AC}}}\) & 3.01 \(\pm\) 0.012 \({}^{\text{\tiny{AB}}}\) & 4.35 \(\pm\) 0.439 \({}^{\text{\tiny{AB}}}\) & 4.97 \(\pm\) 0.497 \({}^{\text{\tiny{AA}}}\) & 5.45 \(\pm\) 0.757 \({}^{\text{\tiny{AA}}}\) \\ \hline \multirow{4}{*}{Hexanoic acid} & C & 4.52 \(\pm\) 0.937 \({}^{\text{\tiny{AC}}}\) & 4.44 \(\pm\) 0.948 \({}^{\text{\tiny{AC}}}\) & 8.19 \(\pm\) 0.618 \({}^{\text{\tiny{AB}}}\) & 9.67 \(\pm\) 0.778 \({}^{\text{\tiny{AB}}}\) & 11.32 \(\pm\) 2.618 \({}^{\text{\tiny{AA}}}\) \\  & Lc & 5.06 \(\pm\) 1.212 \({}^{\text{\tiny{AB}}}\) & 7.86 \(\pm\) 0.986 \({}^{\text{\tiny{AB}}}\) & 8.83 \(\pm\) 1.899 \({}^{\text{\tiny{AB}}}\) & 8.83 \(\pm\) 0.963 \({}^{\text{\tiny{AB}}}\) & 11.68 \(\pm\) 4.520 \({}^{\text{\tiny{AA}}}\) \\  & Lg & 5.81 \(\pm\) 1.496 \({}^{\text{\tiny{AB}}}\) & 7.08 \(\pm\) 0.789 \({}^{\text{\tiny{AB}}}\) & 6.84 \(\pm\) 0.646 \({}^{\text{\tiny{BA}}}\) & 9.75 \(\pm\) 1.75 \({}^{\text{\tiny{AA}}}\) & 9.99 \(\pm\) 1.534 \({}^{\text{\tiny{AA}}}\) \\ \hline \multirow{4}{*}{Octanoic acid} & C & 0.60 \(\pm\) 0.148 \({}^{\text{\tiny{BB}}}\) & 0.38 \(\pm\) 0.049 \({}^{\text{\tiny{BB}}}\) & 1.71 \(\pm\) 0.313 \({}^{\text{\tiny{AA}}}\) & 2.13 \(\pm\) 0.252 \({}^{\text{\tiny{AA}}}\) & 2.34 \(\pm\) 0.692 \({}^{\text{\tiny{AA}}}\) \\  & Lc & 0.99 \(\pm\) 0.330 \({}^{\text{\tiny{AB}}}\) & 1.62 \(\pm\) 0.466 \({}^{\text{\tiny{AB}}}\) & 2.60 \(\pm\) 1.631 \({}^{\text{\tiny{AB}}}\) & 2.57 \(\pm\) 0.714 \({}^{\text{\tiny{AB}}}\) & 4.64 \(\pm\) 3.324 \({}^{\text{\tiny{AA}}}\) \\  & Lg & 0.95 \(\pm\) 0.255 \({}^{\text{\tiny{AB}}}\) & 1.43 \(\pm\) 0.362 \({}^{\text{\tiny{AB}}}\) & 0.47 \(\pm\) 0.246 \({}^{\text{\tiny{AB}}}\) & 1.62 \(\pm\) 1.301 \({}^{\text{\tiny{AB}}}\) & 1.94 \(\pm\) 0.493 \({}^{\text{\tiny{AA}}}\) \\ \hline \multirow{4}{*}{Propanoic acid} & C & n.d. & 0.28 \(\pm\) 0.118 \({}^{\text{\tiny{BB}}}\) & 0.97 \(\pm\) 0.446 \({}^{\text{\tiny{AB}}}\) & 1.53 \(\pm\) 0.440 \({}^{\text{\tiny{AA}}}\) & 0.72 \(\pm\) 0.529 \({}^{\text{\tiny{AB}}}\) \\  & Lc & n.d. & 0.88 \(\pm\) 0.560 \({}^{\text{\tiny{AA}}}\) & 1.47 \(\pm\) 0.955 \({}^{\text{\tiny{AB}}}\) & 1.42 \(\pm\) 0.467 \({}^{\text{\tiny{AA}}}\) & 1.45 \(\pm\) 0.410 \({}^{\text{\tiny{AA}}}\) \\  & Lg & n.d. & 0.25 \(\pm\) 0.074 \({}^{\text{\tiny{AB}}}\) & 0.41 \(\pm\) 0.155 \({}^{\text{\tiny{AB}}}\) & 1.26 \(\pm\) 0.412 \({}^{\text{\tiny{AA}}}\) & 1.71 \(\pm\) 0.401 \({}^{\text{\tiny{AA}}}\) \\ \hline  
\begin{table}
\begin{tabular}{c c c c c c c} \hline \hline
**Origin/Compound** & **Batches** & \multicolumn{4}{c}{**Days of Ripening**} \\  & **0** & **30** & **45** & **60** & **90** \\ \hline \multicolumn{2}{c}{**Alcohols**} & & & & \\ \hline \multirow{3}{*}{2-butanol, (R)-} & C & n.d. & n.d. & 4.27 \(\pm\) 1.14 \({}^{\rm\,BB}\) & 12.42 \(\pm\) 0.860 \({}^{\rm\,AA}\) & 12.94 \(\pm\) 1.005 \({}^{\rm\,AA}\) \\  & Lc & n.d. & n.d. & 7.58 \(\pm\) 1.94 \({}^{\rm\,AA}\) & 5.27 \(\pm\) 1.198 \({}^{\rm\,AA}\) & 5.26 \(\pm\) 0.827 \({}^{\rm\,BA}\) \\  & Lg & n.d. & n.d. & 2.21 \(\pm\) 0.311 \({}^{\rm\,CB}\) & 10.21 \(\pm\) 3.759 \({}^{\rm\,AA}\) & 12.70 \(\pm\) 1.434 \({}^{\rm\,AA}\) \\ \hline \multirow{3}{*}{2-methyl-1-propanol} & C & 0.19 \(\pm\) 0.014 \({}^{\rm\,AB}\) & 0.20 \(\pm\) 0.011 \({}^{\rm\,AB}\) & 0.17 \(\pm\) 0.031 \({}^{\rm\,AB}\) & 0.14 \(\pm\) 0.032 \({}^{\rm\,AB}\) & 0.25 \(\pm\) 0.081 \({}^{\rm\,AA}\) \\  & Lg & 0.18 \(\pm\) 0.026 \({}^{\rm\,AA}\) & 0.17 \(\pm\) 0.027 \({}^{\rm\,AA}\) & 0.16 \(\pm\) 0.038 \({}^{\rm\,AA}\) & 0.14 \(\pm\) 0.035 \({}^{\rm\,AA}\) & 0.14 \(\pm\) 0.002 \({}^{\rm\,BA}\) \\  & Lg & 0.17 \(\pm\) 0.010 \({}^{\rm\,AA}\) & 0.18 \(\pm\) 0.052 \({}^{\rm\,AA}\) & 0.16 \(\pm\) 0.044 \({}^{\rm\,AA}\) & 0.15 \(\pm\) 0.058 \({}^{\rm\,AA}\) & 0.17 \(\pm\) 0.034 \({}^{\rm\,ab}\) \\ \hline \multirow{3}{*}{3-methyl-1-butanol} & C & 8.29 \(\pm\) 0.538 \({}^{\rm\,AA}\) & 5.70 \(\pm\) 0.712 \({}^{\rm\,AB}\) & 3.92 \(\pm\) 0.426 \({}^{\rm\,AC}\) & 3.20 \(\pm\) 0.267 \({}^{\rm\,AC}\) & 2.97 \(\pm\) 0.607 \({}^{\rm\,AC}\) \\  & Lc & 6.14 \(\pm\) 0.192 \({}^{\rm\,BA}\) & 4.63 \(\pm\) 0.755 \({}^{\rm\,AB}\) & 4.09 \(\pm\) 1.013 \({}^{\rm\,AB}\) & 2.61 \(\pm\) 0.804 \({}^{\rm\,AC}\) & 2.57 \(\pm\) 0.211 \({}^{\rm\,AC}\) \\  & Lg & 5.93 \(\pm\) 0.219 \({}^{\rm\,BA}\) & 5.14 \(\pm\) 0.410 \({}^{\rm\,AA}\) & 3.94 \(\pm\) 0.818 \({}^{\rm\,AB}\) & 3.40 \(\pm\) 0.890 \({}^{\rm\,AC}\) & 2.75 \(\pm\) 0.286 \({}^{\rm\,AC}\) \\ \hline \multirow{3}{*}{2-methyl-1-butanol} & C & n.d. & 0.11 \(\pm\) 0.016 \({}^{\rm\,AA}\) & n.d. & n.d. & 0.16 \(\pm\) 0.042 \({}^{\rm\,AA}\) \\  & Lc & n.d. & n.d. & n.d. & 0.12 \(\pm\) 0.022 \({}^{\rm\,AA}\) & 0.21 \(\pm\) 0.015 \({}^{\rm\,AA}\) \\  & Lg & n.d. & n.d. & 0.12 \(\pm\) 0.009 \({}^{\rm\,AA}\) & 0.11 \(\pm\) 0.000 \({}^{\rm\,AA}\) & 0.15 \(\pm\) 0.027 \({}^{\rm\,AA}\) \\ \hline \multirow{3}{*}{Phenylethyl alcohol} & C & 1.36 \(\pm\) 0.137 \({}^{\rm\,AA}\) & 0.86 \(\pm\) 0.094 \({}^{\rm\,BC}\) & 1.04 \(\pm\) 0.151 \({}^{\rm\,BC}\) & 1.02 \(\pm\) 0.173 \({}^{\rm\,AB}\) & 0.93 \(\pm\) 0.089 \({}^{\rm\,AC}\) \\  & Lc & 1.25 \(\pm\) 0.039 \({}^{\rm\,AA}\) & 1.08 \(\pm\) 0.075 \({}^{\rm\,AA}\) & 1.07 \(\pm\) 0.308 \({}^{\rm\,AA}\) & 0.99 \(\pm\) 0.145 \({}^{\rm\,AA}\) & 0.89 \(\pm\) 0.207 \({}^{\rm\,AA}\) \\  & Lg & 1.30 \(\pm\) 0.404 \({}^{\rm\,AA}\) & 1.21 \(\pm\) 0.180 \({}^{\rm\,AB}\) & 0.92 \(\pm\) 0.164 \({}^{\rm\,AB}\) & 0.97 \(\pm\) 0.149 \({}^{\rm\,AB}\) & 0.80 \(\pm\) 0.149 \({}^{\rm\,AB}\) \\ \hline \multirow{3}{*}{2,3-butanediol, [R-(R\({}^{*}\)R\({}^{*}\))]-} & C & 2.80 \(\pm\) 0.853 \({}^{\rm\,AB}\) & 15.42 \(\pm\) 1.458 \({}^{\rm\,AA}\) & 10.01 \(\pm\) 1.038 \({}^{\rm\,BA}\) & 9.59 \(\pm\) 1.204 \({}^{\rm\,AB}\) & 10.93 \(\pm\) 0.449 \({}^{\rm\,AB}\) \\  & Lc & 2.54 \(\pm\) 0.822 \({}^{\rm\,AB}\) & 14.50 \(\pm\) 1.181 \({}^{\rm\,AA}\) & 4.20 \(\pm\) 0.9  
When the evolution of methyl-branched acids is studied, it is remarkable that at day 90 of ripening most of these compounds (2-methyl-propanoic acid, 3-methyl-butanoic acid and 2-methyl-butanoic acid) showed significantly (\(p\leq 0.05\)) higher abundance in Lc and Lg than in control batches.