Chemical Composition, Antioxidant Capacity And Total Phenolic Content of Hazelnuts Grown In Different Countries

Year 2022, Volume: 19 Issue: 2, 262 - 270, 31.05.2022

Sümeyye Şahin , Tahsin Tonkaz , Tarık Yarılgaç

https://doi.org/10.33462/jotaf.893244

Cited By: 10

Abstract

Hazelnut providing the macro-and micronutrients is a constituent of the healthy diet. Hazelnut, one of the most consumed treenut, is produced in the different countries. The geographical origin influences the chemical composition and the biological activity in the several plant foods. The purpose of this study is to evaluate the chemical composition, the antioxidative capacity and total phenolic content of the hazelnut kernels obtained from the different countries, including Azerbaijan, Chile, Italy, and Turkey. The hazelnut kernels were examined for crude oil, ash, moisture, and protein contents. The refractive index, iodine value, and fatty acid composition of the hazelnut oils were identified. In addition, the hazelnut oil, the kernels, and the defatted kernels were tested for their antioxidative activities and total phenolic contents. Protein contents of the hazelnuts from different countries were similar. The largest oil yield was determined in the hazelnut kernels from Chile and Turkey (62.35 ± 0.51 % and 62.29 ± 0.46 %, respectively). While the oil from Turkish hazelnut kernels showed the highest oleic acid content (84.09 ± 0.17 %), Azerbaijan hazelnut oil had the lowest oleic acid content (78.10 ± 0.48). The highest phenolic content was detected in the hazelnut kernels from Azerbaijan. Although the lowest phenolic content was observed in the hazelnut kernels from Turkey, the most potent antioxidative capacity was determined in the Turkish hazelnut kernels, their oil, and their defatted form. It can be concluded that the Turkish hazelnut kernels could contain high amounts of the fat-soluble antioxidants in addition to the water-soluble phenolic antioxidants. The results suggested that the hazelnuts exhibited different chemical composition, antioxidant capacity, and phenolic content depending on their origin.

Keywords

Hazelnut oil, Geographical origin, Fatty acid composition, Antioxidant capacity, Total phenolic content

Chemical Composition, Antioxidant Capacity And Total Phenolic Content of Hazelnuts Grown In Different Countries

Abstract

Makro- ve mikro besin elementlerini karşılayan fındık, sağlıklı beslenmenin bir parçasıdır. En çok tüketilen ağaç yemişlerinden biri olan fındık farklı ülkelerde yetiştirilmektedir. Bilindiği üzere çeşitli bitkisel gıdalarda, coğrafi orjin bitkinin kimyasal bileşimi ve biyolojik aktivitesini etkilemektedir. Bu çalışmanın amacı, Azerbaycan, Şili, İtalya ve Türkiye olmak üzere 4 farklı ülkeden temin edilmiş fındık numunelerinin kimyasal kompozisyonu, antioksidan kapasitesi ve toplam fenolik içeriğini değerlendirmektir. Çalışma kapsamında fındık numunelerinin ham yağ, kül, nem ve protein içerikleri analiz edilmiştir. Bu fındık numunelerinden elde edilen yağların refraktif indeks, iyot sayısı ve yağ asidi kompozisyonları belirlenmiştir. Buna ilaveten fındık yağı, yağı alınmış fındık ve işlem yapılmamış fındık numunelerinin antioksidan içerikleri ile toplam fenolik içerikleri analiz edilmiştir. Çalışma bulgularına göre farklı ülkelere ait fındık numunelerinin protein içeriklerinin benzer olduğu saptanmıştır. Calışmada en fazla yağ verimi Şili ve Türkiye'ye ait fındık numunelerinde belirlenmiştir (sırasıyla % 62.35 ± 0.51 ve % 62.29 ± 0.46). Türkiye’den temin edilen fındıklardan elde edilen yağların en yüksek oleik asit içeriğine (% 84.09 ± 0.17) sahip iken, Azerbaycan fındık numuneleri yağlarının en düşük oleik asit içeriğine (% 78.10 ± 0.48) sahip olduğu bulunmuştur. En yüksek toplam fenolik içeriğine Azerbaycan’dan temin edilen fındık numunelerinde saptanmıştır. En düşük toplam fenolik içeriğinin Türkiye’ye ait fındık numunelerinde gözlemlenmesine rağmen, en yüksek antioksidan kapasitesinin de yine bu Türkiye’den elde edilen fındık numunelerinin, bunlardan elde edilen yağ ve yağsız numunelerin sahip olduğu bulunmuştur. Bu durum Türkiye’ye ait fındık numunelerinin suda çözünebilen fenolik antioksidanlara ek olarak yüksek miktarda yağda çözünebilen antioksidan da içerebileceğini göstermektedir. Çalışma sonuçları, fındığın orjinine bağlı olarak farklı kimyasal bileşim, antioksidan kapasitesi ve fenolik içeriğe sahip olduğunu ortaya koymuştur.

Keywords

Fındık yağı, Coğrafik orjin, Yağ asiti kompozisyonu, Antioksidan kapasite, Toplam fenolik içerik

References

• Alasalvar, C., Shahidi, F., Liyanapathirana, C. M., Ohshima, T. (2003). Turkish Tombul Hazelnut (Corylus avellana L.). 1. Compositional Characteristics. Journal of Agricultural and Food Chemistry, 51(13): 3790-3796.
• Alasalvar, C., Amaral, J. S., Shahidi, F. (2006). Functional Lipid Characteristics of Turkish Tombul Hazelnut (Corylus avellana L.). Journal of Agricultural and Food Chemistry 54: 10177-10183.
• Alasalvar, C. and Shahidi, F. (2009). Tree Nuts: Composition Phytochemicals and Health Effects. Taylor & Francis Group Boca Raton London New York: CRC Press.
• Altun, M., Çelik, S. E., Güçlü, K., Özyürek, M., Erçağ, E., Apak, R. (2011). Total Antioxidant Capacity and Phenolic Contents of Turkish Hazelnut (Corylus avellana L.) Kernels and Oils. Journal of Food Biochemistry 37(1): 53-61.
• Amaral, J.S., Casal, S., Citov´a, I., Santos, A., Seabra, R. M., Oliveira, B. P. P. (2006). Characterization of several hazelnut (Corylus avellana L.) cultivars based in chemical, fatty acid and sterol composition. European Food Research and Technology, 222: 274-280.
• Arcan, I., Yemenicioğlu, A. (2009). Antioxidant activity and phenolic content of fresh and dry nuts with or without the seed coat. Journal of Food Composition and Analysis, 22(3): 184-188.
• Contini, M., Baccelloni, S., Massantini, R., Anelli, G. (2008). Extraction of natural antioxidants from hazelnut (Corylus avellana L.) shell and skin wastes by long maceration at room temperature. Food Chemistry, 110(3): 659-669.
• Crews, C., Hough, P., Godward, J., Brereton, P., Lees, M., Guiet, S., Winkelmann, W. (2005). Study of the Main Constituents of Some Authentic Hazelnut Oils. Journal of Agricultural and Food Chemistry, 53(12): 4843–4852.
• Çetin, N., Yaman, M., Karaman, K., Demir, B. (2020). Determination of some physico-mechanical and biochemical parameters of hazelnut (Corylus avellana L.) cultivars. Turkish Journal of Agriculture and Forestry, 44: 439-450.
• Delgado, T., Malheiro, R., Pereira, J. A., Ramalhosa, E. (2010). Hazelnut (Corylus avellana L.) kernels as a source of antioxidants and their potential in relation to other nuts. Industrial Crops and Products, 32(3): 621-626.
• FAO Food and Agriculture Organization of the United Nations. (2019). FAOSTAT [online]. Website http://www.fao.org/faostat/en/#data/QC [accessed 17 April 2019]
• Firestone, D. (2013). Physical and Chemical Characteristics of Oils, Fats, and Waxes. Champaign AOCS Press.
• Ghirardello, D., Contessa, C., Valentini, N., Zeppa, G., Rolle, L., Gerbi, V., Botta, R. (2013). Effect of storage conditions on chemical and physical characteristics of hazelnut (Corylus avellana L.). Postharvest Biology and Technology, 81: 37-43.
• Güner, K., Duraklı Velioğlu, S., Velioğlu, H., Çelikyurt, G. (2017). Fındık Kepeğinin Fırıncılık Ürünlerinde Kullanımı. Tekirdağ Ziraat Fakültesi Dergisi, 14 (3), 127-139.
• Gunes, N. T., Köksal, A. I., Artık, N., Poyrazoğlu, E. (2010). Biochemical content of hazelnut (Corylus avellana L.) cultivars from West Black Sea Region of Turkey. European Journal of Horticultural Science, 75(2): 77-84.
• James, C. S. (1995). Analytical Chemistry of Foods. Springer US.
• Kaplan, M, Yılmaz, M, Uslu, R, Köprü, S, Gözelle, H, Muhderem, G. (2019). An Optimization Study for The Production of Origanum onites Tincture by Response Surface Methodology: Effect of Solid/Liquid Ratio, Ethanol Concentration and Storage Period. Tekirdağ Ziraat Fakültesi Dergisi, 16(1), 11-22.
• Kıralan, S., Yorulmaz, A., Şimşek, A., Tekin, A. (2015). Classification of Turkish hazelnut oils based on their triacylglycerol structures by chemometric analysis. European Food Research and Technology, 240: 679-688.
• Köksal, A. I., Artik, N., Şimşek, A., Güneş, N. (2006). Nutrient composition of hazelnut (Corylus avellana L.) varieties cultivated in Turkey. Food Chemistry, 99(3): 509-515.
• Li, H., Parry, J. W. (2011). Phytochemical compositions, antioxidant properties, and colon cancer antiproliferation effects of Turkish and Oregon hazelnut. Food and Nutrition Sciences, 02(10): 1142-1149.
• Maguire, L. S., O'Sullivan, S. M., Galvin, K., O'Connor, T. P., O'Brien, N. M. (2004). Fatty acid profile, tocopherol, squalene and phytosterol content of walnuts, almonds, peanuts, hazelnuts and the macadamia nut. International Journal of Food Science and Nutrition, 55(3): 171-178.
• Miraliakbari, H., Shahidi, F. (2008). Antioxidant activity of minor components of tree nut oils. Food Chemistry, 111(2): 421-427.
• Özdemir, A., Akinci, I. (2004). Physical and nutritional properties of four major commercial Turkish hazelnut varieties. Journal of Food Engineering, 63: 341-347.
• Petersen, K. D., Kleeberg, K. K., Jahreis, G., Busch-Stockfisch, M., Fritsche, J. (2012). Comparison of analytical and sensory lipid oxidation parameters in conventional and high-oleic rapeseed oil. European Journal of Lipid Science and Technology, 114(10), 1193-1203.
• Sahin, S. (2011). Bewertung der licht-induzierten Lipidstabilität von konventionellen und high-oleic Rapsölen supplementiert mit natürlichen Antioxidantien. Hamburg Uygulamalı Bilimler Üniversitesi (HAW), Yaşam Bilimleri Fakültesi, Hamburg, Almanya.
• Savage, G.P., McNeil, D. L. (1998). Chemical composition of hazelnuts Corylus avellana L grown in New Zealand. International Journal of Food Sciences and Nutrition, 49: 199-203.
• Savage, G. P., McNeil, D. L., Dutta, C. P. (1997). Lipid composition and oxidative stability of oils in hazelnuts (Corylus avellana L.) grown in New Zealand. Journal of the American Oil Chemists' Society, 74(6): 755-759.
• Seyhan, F., Ozay, G., Saklar, S., Ertas, E., Satır, G., Alasalvar, C. (2007). Chemical changes of three native Turkish hazelnut varieties (Corylus avellana L.) during fruit development. Food Chemistry, 105: 590-596.
• Shahidi, F., Alasalvar, C., Liyana-Pathirana, C. M. (2007). Antioxidant phytochemicals in hazelnut kernel (Corylus avellana L.) and hazelnut byproducts. Journal of Agricultural and Food Chemistry, 55: 1212-1220.
• Shimamoto, G. G., Aricetti, J. A., Tubino, M. (2016). A simple, fast, and green titrimetric method for the determination of the iodine value of vegetable oils without wijs solution (ICl). Food Analytical Methods, 9: 2479–2483.
• Solar, A., Stampar, F. (2011). Characterisation of selected hazelnut cultivars: phenology, growing and yielding capacity, market quality and nutraceutical value. Journal of the Science of Food and Agriculture, 91: 1205–1212.
• Venkatachalam, M., Sathe, S. K. (2006). Chemical composition of selected edible nut seeds. Journal of Agricultural and Food Chemistry, 54(13): 4705-4714.
• WHO World Health Organization (2019). Healthy diet [online]. Website https://www.who.int/news-room/fact-sheets/detail/healthy-diet [accessed 15 April 2019].
• Yang, J., Liu, R. H., Halim, L. (2009). Antioxidant and antiproliferative activities of common edible nut seeds. LWT - Food Science and Technology, 42(1): 1-8.