## 3 Results and Discussion
### Impact of Fermentation Parameters on Volatile Compound Production
\begin{table}
\begin{tabular}{c c c c c c c} \hline \hline  & \multicolumn{2}{c}{_Sc/Lt Ratio_} & \multicolumn{2}{c}{**Nitrogen**} & \multicolumn{2}{c}{**Oxygenation**} & \multicolumn{2}{c}{**Temperature**} & \multicolumn{1}{c}{**Residuals**} \\ \hline \multirow{3}{*}{1-Propanol} & Stand. Effect & 0.146 & \(-\)3.271 & \(-\)1.220 & 2.392 & \multirow{3}{*}{14.30\%} \\  & _p_-Value & 0.893 & **0.047** & 0.310 & 0.097 & \\  & Var. Contrib. & 0.10\% & **51.10\%** & 7.12\% & 27.30\% & 14.30\% \\ \hline \multirow{3}{*}{Isobutanol} & Stand. Effect & \(-\)1.647 & \(-\)0.324 & 0.402 & 0.558 & \multirow{3}{*}{14.30\%} \\  & _p_-Value & 0.198 & 0.767 & 0.715 & 0.616 & \\  & Var. Contrib. & 43.00\% & 1.67\% & 2.57\% & 4.95\% & 47.70\% \\ \hline \multirow{3}{*}{1-Penten-3-ol} & Stand. Effect & 1.521 & \(-\)1.711 & 1.141 & 0.000 & \multirow{3}{*}{13.40\%} \\  & _p_-Value & 0.226 & 0.186 & 0.337 & 1.000 & \\  & Var. Contrib. & 24.20\% & 30.70\% & 13.60\% & 0.00\% & \\ \hline \multirow{3}{*}{1-Butanol} & Stand. Effect & \(-\)0.272 & 0.410 & \(-\)0.807 & \(-\)0.484 & \multirow{3}{*}{72.70\%} \\  & _p_-Value & 0.803 & 0.709 & 0.479 & 0.661 & \\  & Var. Contrib. & 2.00\% & 4.08\% & 15.80\% & 5.68\% & 72.70\% \\ \hline \multirow{3}{*}{Isoamylalcohol} & Stand. Effect & \(-\)9.407 & \(-\)0.802 & \(-\)0.591 & \(-\)3.636 & \multirow{3}{*}{2.84\%} \\  & _p_-Value & **0.003** & 0.481 & 0.596 & **0.036** & \\  & Var. Contrib. & 83.70\% & 0.61\% & 0.33\% & 12.50\% & 2.84\% \\ \hline \multirow{3}{*}{3-Ethoxy-1-propanol} & Stand. Effect & 0.497 & \(-\)0.508 & 0.255 & \(-\)0.457 & \multirow{3}{*}{79.40\%} \\  & _p_-Value & 0.654 & 0.647 & 0.815 & 0.679 & \\  & Var. Contrib. & 6.53\% & 6.83\% & 1.73\% & 5.54\% & 79.40\% \\ \hline \multirow{3}{*}{1-Heptanol} & Stand. Effect & 1.632 & 2.472 & \(-\)0.513 & \(-\)0.793 & \multirow{3}{*}{23.70\%} \\  & _p_-Value & 0.201 & 0.090 & 0.643 & 0.486 & \\  & var. Contrib. & 21.00\% & 48.20\% & 2.08\% & 4.96\% & 23.70\% \\ \hline \multirow{3}{*}{1-Octanol} & Stand. Effect & 1.542 & 2.141 & 0.600 & 2.227 & \multirow{3}{*}{19.60\%} \\  & _p_-Value & 0.221 & 0.122 & 0.591 & 0.112 & \\  & Var. Contrib. & 15.60\% & 30.00\% & 2.35\% & 32.50\% & 19.60\% \\ \hline \multirow{3}{*}{1-Nonanol} & Stand. Effect & 1.722 & 1.457 & \(-\)0.662 & \(-\)1.987 & \multirow{3}{*}{14.10\%} \\  & _p_-Value & 0.184 & 0.241 & 0.555 & 0.141 & \\  & Var. Contrib. & 23.80\% & 17.00\% & 3.52\% & 31.60\% & 24.10\% \\ \hline \multirow{3}{*}{1-Decanol} & Stand. Effect & 0.547 & 1.443 & \(-\)0.448 & 0.348 & \multirow{3}{*}{24.10\%} \\  & _p_-Value & 0.622 & 0.245 & 0.685 & 0.751 & \\  & Var. Contrib. & 5.25\% & 36.50\% & 3.52\% & 2.13\% & 52.60\% \\ \hline \multirow{3}{*}{2-Phenylethanol} & Stand. Effect & 2.350 & **9.281** & \(-\)2.367 & \(-\)9.895 & \multirow{3}{*}{15.10\%} \\  & _p_-Value & 0.100 & 0.003 & 0.099 & 0.002 & \\  & Var. Contrib. & 2.79\% & **23.50\%** & 2.83\% & **49.40\%** & 1.51\% \\ \hline \hline \end{tabular} Stand. Effect = standardized effect; Var. Contrib. = contribution to variance. Data are identified as statistically almost significant (0.05 \(<\)_p_-value \(<\) 0.1, light grey background), significant (_p_-value \(<\) 0.05, grey background), or very significant (_p_-value \(<\) 0.01, dark grey background).  
\end{table} 
Table 6: Impact of fermentation parameters on the production of different volatile alcohols.