## 3 Results and Discussion
### Fatty Acid Profiles and Health Indexes of Groin, Jowl, and Trimming Shoulder Fats
In the analyzed fats, the dominant fatty acid was oleic acid (C18:1 _n_-9), its share ranged from 42.30% for GF_L to 48.10% for TSF_L. Another fatty acid found in significant amounts was palmitic acid (C16:0) with a percentage content ranging from 22.07% for JF_L to 25.16% for GF_D. The most abundant PUFA was linoleic acid (C18:2 _n_-6) (8.91% for TSF_L--11.87% for TSF_D). An influence of the feeding type on the content of linoleic acid (C18:2 _n_-6) was found in groin fat (Table 5). In the case of fat of pigs fed a liquid diet, the average content of linoleic acid was 9.17%, and in dry feeding system--it was higher (10.44%). In groin fat, the feeding system had no effect on the content of the following acids: myristic (C14:0), palmitic (C16:0), stearic (C18:0), and oleic (C18:1). The share of oleic fatty acid (C18:1) in the groin fat of pigs fed liquid or dry feed reached 42.30% and 42.66%, respectively. \begin{table}
\begin{tabular}{c c c c c} \hline \hline \multirow{2}{*}{**Fatty Acid**} & **Fatty Acid Percentage** & \multirow{2}{*}{**Fatty Acid Percentage in Positions (\%)**} & \multicolumn{2}{c}{**Fatty Acid Share in**} \\  & **in TAG (\%)** & & **sn-1,3** & \\ \hline \hline \multicolumn{5}{c}{GF\_L} \\ \hline
14:0 & 1.97 \(\pm\) 0.45 a  & 5.06 & 0.43 & 85.62 \\ \hline
16:0 & 24.46 \(\pm\) 2.03 e  & 61.67 & 5.86 & 84.04 \\ \hline
18:0 & 15.16 \(\pm\) 1.02 d  & 4.97 & 20.26 & 10.93 \\ \hline
18:1 _n_-9 & 42.30 \(\pm\) 2.87 f  & 15.99 & 55.46 & 12.60 \\ \hline
18:2 _n_-6 & 9.17 \(\pm\) 1.27 b  & 5.44 & 11.04 & 19.77 \\ \hline \multicolumn{5}{c}{GF\_D} \\ \hline
14:0 & 1.64 \(\pm\) 0.38 a  & 4.04 & 0.44 & 82.12 \\ \hline
16:0 & 25.16 \(\pm\) 1.84 e  & 62.14 & 6.67 & 82.32 \\ \hline
18:0 & 13.83 \(\pm\) 0.95 d  & 4.39 & 18.55 & 10.58 \\ \hline
18:1 _n_-9 & 42.66 \(\pm\) 2.53 f  & 15.68 & 56.15 & 12.25 \\ \hline
18:2 _n_-6 & 10.44 \(\pm\) 1.36 c  & 5.49 & 12.92 & 17.52 \\ \hline \hline \end{tabular}
\end{table} 
Table 5: The distribution of selected fatty acids in the internal (_sn_-2) and external (_sn_-1,3) positions of triacylglycerolsycerols (TAG) of pork groin fat and the share of individual acids in the internal position. [PERSON] et al. [42] reported a similar oleic acid content in their research. The fat of pigs fed a diet containing soybean raw materials contained 42.40% of oleic acid. \begin{table}
\begin{tabular}{c c c c c} \hline \hline \multirow{2}{*}{**Fatty Acid**} & **Fatty Acid Percentage** & \multirow{2}{*}{**Fatty Acid Percentage in TAG (\%)**} & \multirow{2}{*}{**Fatty Acid Percentage in Positions (\%)**} & **Fatty Acid Share in** \\  & & & & **_sn-2_ Position (\%)_ \\ \cline{2-5}  & & _sn-2_ & _sn-1,3_ & \\ \hline \multicolumn{5}{c}{JF\_L} \\ \hline
14:0 & 1.63 \(\pm\) 0.25 b  & 4.29 & 0.30 & 87.73 \\ \hline
16:0 & 22.07 \(\pm\) 1.48  & 57.49 & 4.36 & 88.83 \\ \hline
18:0 & 11.92 \(\pm\) 0.86  & 4.61 & 15.58 & 12.89 \\ \hline
18:1 _n_-9 & 47.83 \(\pm\) 2.49  & 20.71 & 61.39 & 14.43 \\ \hline
18:2 _n_-6 & 9.62 \(\pm\) 1.11 c  & 5.98 & 11.44 & 20.72 \\ \hline  & & & & \\ \hline
14:0 & 1.45 \(\pm\) 0.71 a  & 3.92 & 0.22 & 90.11 \\ \hline
16:0 & 22.34 \(\pm\) 1.21 s  & 59.03 & 3.99 & 88.08 \\ \hline
18:0 & 11.24 \(\pm\) 1.42 e  & 4.16 & 14.78 & 12.34 \\ \hline
18:1 _n_-9 & 46.93 \(\pm\) 3.01 h  & 19.13 & 60.83 & 13.59 \\ \hline
18:2 _n_-6 & 11.06 \(\pm\) 0.82 d  & 6.48 & 13.35 & 19.53 \\ \hline \hline \end{tabular}
\end{table} 
Table 6: The distribution of selected fatty acids in the internal (_sn_-2) and external (_sn_-1,3) positions of triacylglycerhydcerols (TAG) of pork jowl fat and the share of individual acids in the internal position.