Journals / Konya Mühendislik Bilimleri Dergisi / 2021 / Cilt: 9 Sayı: 4

INVESTIGATION OF THE CHEMICAL CHARACTERISTICS AND OXIDATIVE STABILITY OF SOME COMMERCIAL COLD-PRESSED OILS

Bazı Ticari Soğuk Pres Yağların Kimyasal Özelliklerinin ve Oksidatif Kararlılığının İncelenmesi

Pages
904–916
Publication Date
2021-12-04
DOI
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

The results showed that the seed oils contained appreciable amounts of unsaturated fatty acids (above 79 %).

📌 3 Key Takeaways

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Objective & Hypothesis:In this study, the chemical composition and oxidative stability of cold-pressed flaxseed, black seed, pumpkin seed, walnut seed, and poppy seed oils were examined.
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Key Findings & Data:The results showed that the seed oils contained appreciable amounts of unsaturated fatty acids (above 79 %).
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Conclusion & Impact:The obtained data suggest that the seed oils in this study may serve as special dietary sources.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Soğuk pres tohum yağları · Yağ asit kompozisyonu · Tokol profili

Abstract

In this study, the chemical composition and oxidative stability of cold-pressed flaxseed, black seed, pumpkin seed, walnut seed, and poppy seed oils were examined. The results showed that the seed oils contained appreciable amounts of unsaturated fatty acids (above 79 %). Polyunsaturated fatty acids, particularly linoleic acids were dominant, with values ranging from 53.24 % - 71.37 % of the total amount of fatty acids except for pumpkin seed oil. Tocols content was found to be between ~ 490-932 mg kg-1, and the flaxseed oil exhibited the highest levels of total tocopherols (977.47 mg kg-1) under the experimental conditions. While, the highest PV was found in walnut seed oil (2.81 meq O2 kg-1), and the highest content of FFAs was reported for flaxseed oil (1.82 %). OSI values were 4.15, 3.57, 4.31, 3.98 and 4.92 h for the flaxseed, black seed, pumpkin seed, walnut seed, and poppy seed oils, respectively. The obtained data suggest that the seed oils in this study may serve as special dietary sources.

Özet

Bu çalışmada, soğuk pres keten tohumu, çörek otu, kabak çekirdeği, ceviz ve haşhaş tohumu yağlarının kimyasal bileşimi ve oksidatif stabilitesi incelenmiştir. Sonuçlar, çekirdek yağlarının kayda değer miktarlarda doymamış yağ asitlerini içerdiğini (% 79'un üzerinde), bunlar arasında ise çoklu doymamış yağ asitlerinin, özellikle de linoleik asitlerin, kabak çekirdeği yağı hariç diğer yağlardaki toplam yağ asidi miktarının % 53.24 ile % 71.37'si arasındaki değerlerde baskın olduğunu göstermiştir. Yağların tokol içeriği ~ 490-932 mg kg-1 arasında bulunmuş ve deney koşullarındaki en yüksek toplam tokoferol düzeyi (977.47 mg kg-1) keten tohumu yağında tespit edilmiştir. En yüksek PV değeri ceviz yağında rapor edilmiş (2.81 meq O2 kg-1), en yüksek FFA içeriği ise keten tohumu yağında (%1.82) bulunmuştur. OSI değerleri; keten tohumu, çörek otu, kabak çekirdeği, ceviz ve haşhaş tohumu yağları için sırasıyla 4.15, 3.57, 4.31, 3.98 ve 4.92 saat olarak tespit edilmiştir. Elde edilen veriler, bu çalışmadaki tohum yağlarının özel diyet kaynakları olarak kullanılabileceğini göstermektedir.

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Cite This Article

AYYILDIZ, H. F., TOPKAFA, M., SHERAZI, S. T. H., MAHESAR, S. A., KARA, H. (2021). INVESTIGATION OF THE CHEMICAL CHARACTERISTICS AND OXIDATIVE STABILITY OF SOME COMMERCIAL COLD-PRESSED OILS. Konya Mühendislik Bilimleri Dergisi, Cilt: 9 Sayı: 4, 904–916. https://ajindex.com/articles/938523

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References (9)

  1. AOCS, 1996, "Method Cd 8b‐90", Official methods and recommended practices of the American Oil Chemist's Society. AOCS, 1998a, "Method Cd 1‐25: Iodine value of fats and oils. Wijs Method", Official Methods and Recommended Practices of the American Oil Chemists' Society. AOCS, 1998b, "AOCS official method Ca 5a–40: Free fatty acids. Official methods and recommended practices of the American Oil Chemists’ Society". AOCS, 1998c, "Method Cd 12b‐92", Official Methods and Recommended Practices of the American Oil Chemists' Society. Ayyildiz, H. F., Kara, H., & Sherazi, S. T. H., 2011, "A novel approach for determination of free fatty acids in vegetable oils by a flow injection system with manual injection", Lipids, 46 (12), 1181-1190.
  2. Ayyildiz, H. F., Topkafa, M., Kara, H., & Sherazi, S. T. H., 2015, "Evaluation of fatty acid composition, tocols profile, and oxidative stability of some fully refined edible oils", International Journal of Food Properties, 18 (9), 2064-2076.
  3. Bozan, B. and Temelli, F., 2008, "Chemical composition and oxidative stability of flax, safflower and poppy seed and seed oils", Bioresource Technology, 99 (14), 6354-6359.
  4. Briggs, M. A., Petersen, K. S., & Kris-Etherton, P. M., 2017, Saturated fatty acids and cardiovascular disease: replacements for saturated fat to reduce cardiovascular risk, Healthcare, 29. Budilarto, E. S. and Kamal‐Eldin, A., 2015, "The supramolecular chemistry of lipid oxidation and antioxidation in bulk oils", European Journal of Lipid Science and Technology, 117 (8), 1095-1137.
  5. Cakaloglu, B., Ozyurt, V. H., & Otles, S., 2018, "Cold press in oil extraction. A review", Ukrainian food journal (7, Issue 4), 640-654.
  6. Celenk, V. U., Gumus, Z. P., Argon, Z. U., Buyukhelvacigil, M., & Karasulu, E., 2018, "Analysis of chemical compositions of 15 different cold-pressed oils produced in Turkey: a case study of tocopherol and fatty acid analysis", Journal of the Turkish Chemical Society Section A: Chemistry, 5 (1), 1-18.
  7. Choe, E. and Min, D. B., 2006, "Mechanisms and factors for edible oil oxidation", Comprehensive reviews in food science and food safety, 5 (4), 169-186. Čmolík, J. and Pokorný, J., 2000, "Physical refining of edible oils", European Journal of Lipid Science and Technology, 102 (7), 472-486.
  8. Codex Alimentarius, F., 2001, "WHO: Fats, oils and related products", Codex Standard for Edible Fats and Oils Not Covered by Individual Standards.(CODEX STAN 210 1999).
  9. Commission, E. U., 1991, "Regulation EEC 2568/91 on the char