Evaluation of the Thermal Behavior of Commercial Cold-Pressed Oils Obtained from Apricot and Peach By-Products
Fruit kernels are bio-waste in the food industry and can be managed as oil raw materials. The aim of the study was to investigate the stability, oxidation resistance, profile of fatty acids, and their distribution at the triacylglycerol positions of commercially available cold-pressed oils from apri...
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2024-11-01
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| author | Magdalena Wirkowska-Wojdyła Ewa Ostrowska-Ligęza Agata Górska Rita Brzezińska Iga Piasecka |
| author_facet | Magdalena Wirkowska-Wojdyła Ewa Ostrowska-Ligęza Agata Górska Rita Brzezińska Iga Piasecka |
| author_sort | Magdalena Wirkowska-Wojdyła |
| collection | DOAJ |
| description | Fruit kernels are bio-waste in the food industry and can be managed as oil raw materials. The aim of the study was to investigate the stability, oxidation resistance, profile of fatty acids, and their distribution at the triacylglycerol positions of commercially available cold-pressed oils from apricot (A1 and A2) and peach kernels (P1 and P2). Additionally, the melting profiles of the oils were recorded. It was found that the tested oils were a good source of unsaturated fatty acids, especially oleic and linoleic acid. The apricot kernel oils differed significantly regarding the contents of oleic acid and linoleic acid, while the peach kernel oils did not differ in the content of fatty acids. Saturated palmitic and stearic acids mainly occupied the external <i>sn</i>-1,3 positions, while linoleic acid was esterified in the internal position in all the analyzed oils. The occurrence of endothermic peaks at low temperatures was recorded on the melting curves, indicating the presence of triacylglycerol fractions with high proportions of poly- and monounsaturated fatty acids. The apricot kernels of the A1 oil were characterized by the highest oxidative stability measured by the maximum oxidation time at the tested temperatures. The activation energy of the oxidation reaction was at a similar level in all the studied oils. Due to the oils’ characteristics, it is worth considering the use of apricot and peach kernel oils in the food industry. |
| format | Article |
| id | doaj-art-c1cb022d25924dd79b32d6bb9ccbf6b1 |
| institution | OA Journals |
| issn | 2076-3417 |
| language | English |
| publishDate | 2024-11-01 |
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| spelling | doaj-art-c1cb022d25924dd79b32d6bb9ccbf6b12025-08-20T01:55:28ZengMDPI AGApplied Sciences2076-34172024-11-0114231091710.3390/app142310917Evaluation of the Thermal Behavior of Commercial Cold-Pressed Oils Obtained from Apricot and Peach By-ProductsMagdalena Wirkowska-Wojdyła0Ewa Ostrowska-Ligęza1Agata Górska2Rita Brzezińska3Iga Piasecka4Department of Chemistry, Institute of Food Sciences, Warsaw University of Life Sciences, 166 Nowoursynowska Str., 02-787 Warsaw, PolandDepartment of Chemistry, Institute of Food Sciences, Warsaw University of Life Sciences, 166 Nowoursynowska Str., 02-787 Warsaw, PolandDepartment of Chemistry, Institute of Food Sciences, Warsaw University of Life Sciences, 166 Nowoursynowska Str., 02-787 Warsaw, PolandDepartment of Chemistry, Institute of Food Sciences, Warsaw University of Life Sciences, 166 Nowoursynowska Str., 02-787 Warsaw, PolandDepartment of Chemistry, Institute of Food Sciences, Warsaw University of Life Sciences, 166 Nowoursynowska Str., 02-787 Warsaw, PolandFruit kernels are bio-waste in the food industry and can be managed as oil raw materials. The aim of the study was to investigate the stability, oxidation resistance, profile of fatty acids, and their distribution at the triacylglycerol positions of commercially available cold-pressed oils from apricot (A1 and A2) and peach kernels (P1 and P2). Additionally, the melting profiles of the oils were recorded. It was found that the tested oils were a good source of unsaturated fatty acids, especially oleic and linoleic acid. The apricot kernel oils differed significantly regarding the contents of oleic acid and linoleic acid, while the peach kernel oils did not differ in the content of fatty acids. Saturated palmitic and stearic acids mainly occupied the external <i>sn</i>-1,3 positions, while linoleic acid was esterified in the internal position in all the analyzed oils. The occurrence of endothermic peaks at low temperatures was recorded on the melting curves, indicating the presence of triacylglycerol fractions with high proportions of poly- and monounsaturated fatty acids. The apricot kernels of the A1 oil were characterized by the highest oxidative stability measured by the maximum oxidation time at the tested temperatures. The activation energy of the oxidation reaction was at a similar level in all the studied oils. Due to the oils’ characteristics, it is worth considering the use of apricot and peach kernel oils in the food industry.https://www.mdpi.com/2076-3417/14/23/10917peach kernel oilapricot kernel oiloxidative stabilityDSC |
| spellingShingle | Magdalena Wirkowska-Wojdyła Ewa Ostrowska-Ligęza Agata Górska Rita Brzezińska Iga Piasecka Evaluation of the Thermal Behavior of Commercial Cold-Pressed Oils Obtained from Apricot and Peach By-Products Applied Sciences peach kernel oil apricot kernel oil oxidative stability DSC |
| title | Evaluation of the Thermal Behavior of Commercial Cold-Pressed Oils Obtained from Apricot and Peach By-Products |
| title_full | Evaluation of the Thermal Behavior of Commercial Cold-Pressed Oils Obtained from Apricot and Peach By-Products |
| title_fullStr | Evaluation of the Thermal Behavior of Commercial Cold-Pressed Oils Obtained from Apricot and Peach By-Products |
| title_full_unstemmed | Evaluation of the Thermal Behavior of Commercial Cold-Pressed Oils Obtained from Apricot and Peach By-Products |
| title_short | Evaluation of the Thermal Behavior of Commercial Cold-Pressed Oils Obtained from Apricot and Peach By-Products |
| title_sort | evaluation of the thermal behavior of commercial cold pressed oils obtained from apricot and peach by products |
| topic | peach kernel oil apricot kernel oil oxidative stability DSC |
| url | https://www.mdpi.com/2076-3417/14/23/10917 |
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