## 3 Results and Discussion
### Arthospira Plateensis Fermentation
platensis_, both before and after the fermentation process, is that of hydrocarbons (Supplementary Table S1), as also demonstrated in previous studies [30]. The concentration of these compounds was higher in respect to the amount of all the other components. Hydrocarbon release was significantly different when comparing fermentations (\(p\) = 0.007) and opposing technological treatments (\(p\) < 0.001). Statistical differences were observed in hydrocarbon quantity among the UV- and heat-treated samples (\(p\) < 0.001), among samples subjected to the same process, and between fermented and not fermented samples (\(p\) = 0.007), but no interaction between factors (type of treatment and fermentation) was observed (Figure 3, Supplementary Table S1). Figure 3: Heat map performed on volatile chemical classes’ concentrations detected in sterilized (ST) or UV-treated (UV) _A. platensis_ biomasses fermented with _L. casei_ 2240 (2240) and _L. rhamn_ GG (GG) as well as treated but unfermented biomasses (Cntr). A scale ranging from a maximum of 10 \(\upmu\)g/g (dark green) to a minimum of 0 \(\upmu\)g/g (light green) was used. \begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline
**Chemical Class, Compound** & **Odor Type** & **Calculated LRI** & **Reference LRI** & **Identification** & **Reference** & **Effect of** & **Effect of** \\
**Name** & **Odor Type** & **Calculated LRI** & **Reference LRI** & **Method** & **Reference** & **Stabilization** & **Fementation** \\ \hline _Aldehydes_ & _Aldehydes_ & & & & & & & \\
1-3-Methyl-Aldehyde & aldehyde & & 805 & 814 & MS + LRI & [52] & n & n \\
1-2-Methyl-butanal & chocolate & & 904 & 903 & MS + LRI & [53] & nd & nd \\
1-3-Neuraldehyde & aldehyde & & 907 & 888 & MS + LRI & [54] & p & p \\ Hexanal & green & 1075 & 1086 & MS + LRI & [55] & n & n \\ Additional & vegetable & 1452 & 1468 & MS + LRI & [56] & p & p \\ Benzaldehyde & fruity & 1523 & 1537 & MS + LRI & [56] & n & n \\
2-5-Dimethyl benzaldehyde & & & 1733 & 1705 & MS + LRI & [53] & p & p \\ \hline _Actons_ & & & & & & & & \\ Acotone & solvent & 810 & 901 & MS + LRI & [52] & p & p \\
2-Butanone & ethereal & & 994 & 901 & MS + LRI & [52] & p & p \\
3-Aldehyde & battery & & 971 & 973 & MS + LRI & [54] & n & p \\
4-Methyl-2-heptanone & camorphous & & 1229 & 126 & MS + LRI & [57] & p & p \\
3-Aloxone & herbal & & 1245 & 1261 & MS + LRI & [58] & p & p \\
2-Octanone & earthly & 1277 & 1287 & MS + LRI & [53] & p & n \\ Acotin & battery & 1282 & 1300 & MS + LRI & [54] & n & p \\
2-2,6-Trimedy-cyclebaene & thuquinc & 1306 & 1308 & MS + LRI & [59] & p & n \\ Substance & ctrins & & 1329 & 1335 & MS + LRI & [60] & p & n \\ \hline _Estors_ & & & & & & & & \\ Ethyl acetate & ethereal & & 872 & 869 & MS + LRI & [61] & n & p, \\ Ethyl ceramide & vaway & 1430 & 1438 & MS + LRI & [61] & nd & nd \\ Ethyl deanote & wavy & 1628 & 1645 & MS + LRI & [61] & p & n \\ Phenethyl acetate & foral & & 1804 & 1803 & MS + LRI & [62] & nd & nd \\ \hline _Tervons, neurosciros and similar_ & & & & & & & \\ Py-Xylene & spicy & 1155 & 1143 & MS + LRI & [54] & n & n \\ \(\alpha\)-Cycllectral & cfms & 1427 & 1420 & MS + LRI & [53] & p & p \\ \(\beta\)-Cycllectral & tropical & 1609 & 1612 & MS + LRI & [59] & p & p \\ Sifranal & hefhal & 1635 & 1637 & MS + LRI & [59] & p & p \\ a-lonene & fruity & 1675 & MS & P & n & p \\ a-lonene & foral & 1841 & 1848 & MS + LRI & [64] & p & p \\ \(\beta\)-lonene & floral & 1918 & 1935 & MS + LRI & [64] & p & p \\ \(\beta\)-lonne-\(\beta\)-6-epoxide & fruity & 1950 & 1989 & MS + LRI & [53] & p & n \\ \hline _Actions_ & & & & & & & & \\ Ethanol & alcoholic & 923 & 903 & MS + LRI & [54] & p & p \\ Isobutyl alcohol & ethereal & 1080 & 1100 & MS + LRI & [60] & n & n \\ Isoamyl alcohol & fermented & & 1195 & 1210 & MS + LRI & [60] & p & p \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Volatile compounds found on _Arthospira platensis_ treated but not fermented and fermented samples.