Quantification of Sterol Contents in Almond (PrunusamygdalusL.) Oils

Matthäus, Bertrand; Özcan, Mehmet Musa

doi:10.30492/ijcce.2020.33367

Quantification of Sterol Contents in Almond (PrunusamygdalusL.) Oils

Document Type : Research Article

Authors

¹ Max Rubner-Institut (MRI) Federal Research Institute for Nutrition and Food, Department for Safety and Quality for Cereals Schützenberg 12 D-32756 Detmold, GERMANY

² Department of Food Engineering, Faculty of Agricultural, Selcuk University, 42031 Konya, TURKEY

10.30492/ijcce.2020.33367

Abstract

In this study, the sterol contents of almond kernel oils collected from naturally growing almond trees in Mersin province were determined. Generally, the sterol contents of almond oil samples varied depending on almond types. The major sterols in almond oils wereß-sitosterol,
5-avenasterol and campesterol, followed by 5,24-stigmastadienol, stigmasterol, sitostanol, and cholesterol. While β-sitosterol contents of almond oils varied between 1986 mg/kg (T26) and 3908 mg/kg (T16), 5-avenasterol contents of almond oils samples were in the range between 215.9 mg/kg (T31) and 581.7 mg/kg (T16). In addition, campesterol contents of oils were found from 75.8 mg/kg (T31) to 172.3 mg/kg (T16). Interestingly, all sterol contents (except cholesterol, brassicasterol
and 7-campesterol) of T16 almond oil were found higher than those of the other almond types.
The current study showed that almond kernels of the investigated almond types from Turkey are potential sources of valuable oil which might be used as edible oil or industrial applications.

Keywords

Main Subjects

Food Science & Technology

References

[1] Moayedi A., Rezaei K., Moini S., Keshavarz B., Chemical Composition of Oils from Several Wild Almond Species, J. Am. Oil Chem. Soc., 88:503-508 (2011).

[2] Izaddost M., Imani A., Piri S., Bagiri A.M., Oil Content, Major Fatty Acids Composition, α-Tocopherol and Nut Characteristics of Almond at Time of Harvest, J.BasicallyAppl Sc. Res., 3: 201-205 (2013).

[3] Miraliakbari H., Shahidi F., Antioxidant Activity of Minör Components of Tree Nut Oils, Food Chem.111:421-427 (2008).

[4] Kamal-Eldin A., Moreau R.A., Tree nut Oils. In: “Gourmet and Health-Promoting Special Oils”, Kamal-Eldin A., Moreau R.A., (Eds.), p.587, AOCS Press, Urbana, Ill, USA, (2009).

[5] Aşkın M.A., Balta M.F., Tekintaş F.E., Kazankaya A., Balta F., Fatty Acid Composition Affected by Kernel Weight in Almond (Prunusdulcis (Mill.) D.A. Webb.) Genetic Resources. J. Food Comp. Analysis, 20:7-12 (2007).

[6] Matthäus B., Özcan M.M., Al Juhaimi F., Adiamo O.Q., Alsawmahi O.N., Ghafoor K., Babiker E.E., Effect of the Harvest time on Oil Yield, Fatty Acid, Tocopherol and Sterol Contents of Developing Almond and Walnut kernels. J. Oleo Sci., 67(1): 39-45 (2018).

[7] Fernandes G.D., Gómez-Coca R.B., CarmenPérez-Camino M., Moreda W., Barrera-Arellano D., Chemical Characterization of Major and Minor Compounds of Nut Oils: Almond, Hazelnut, and Pecan Nut. J. Chem., 1:11 (2017).

[8] Özcan M.M., Ünver A., Erkan E., Arslan D., Characteristics of some Almond Kernel and Oils, Sci. Hort., 127:330-333 (2011).

[9] Normén L., Frohlich J, Trautwein E., Role of Plant Sterols in Cholesterol Lowering. In: Dutta P C. (Ed.), “Phytosterols as Functional Food Components and Nutraceuticals”, Marcel Dekker, Inc., Newyork, pp. 243-315 (2004).

[10] Dulf F.V., Unguresan M-L., Vodnar D.C., Socaciu C., Free and Esterified Sterol Distribution in Four Romanian Vegetable Oil, Not. Bot. Hort. Agrobot. Cluj, 38 (2): 91-97 (2010).

[11] Matthäus B.,Özcan M.M., Quantitation of Fatty Acids, Sterols, and Tocopherolsin Turpentine (Pistaciaterebinthus Chia) Growing wild in Turkey, J. Agric. Food Chem., 54(20):7 667-7671 (2006).

[12] Püskülcü H.,Ikiz F., “Introduction to Statistic”, p 333. Bilgehan Presss: Bornova, Izmir, Turkey
(1989) [in Turkish].

[13] Savage P., McNeil D. L., Dutta P. C., Lipid Composition and Oxidative Stability of Oils in Hazelnuts (Corylus ellana L.) Grown in New Zealand, J. Amer. Oil Chem. Soc., 74: 755-759 (1997).

[14] White P. J., Armstrong L. S., Effect of Selected Oat Sterols on the Determination of Heated Soybean Oil, J. Amer. Oil Chem. Soc., 63: 525-529 (1986).

[15] Madawala S.R.P., Kochhar S.P., Dutta P.C., Lipid Components and Oxidative Status of Selected Specialty Oils, Gracas y Aceites, 63: 143-151 (2012).

[16] Phillips K.M., Ruggio D.M., Ashraf-Khorasani M.J., Phytosterol Composition of Nuts and Seeds Commonly Consumed in the United States, Agric. Food Chem., 53: 9436-9445 (2005).

[17] Johansson A.K., KuusistoP.H., Lakkso P.H., Derome K.K., Sepponen P.J., KatajistoJ.K., Geographical Variations in Seed Oils from Rubuschamaemorus and Empetrum, Phytochem., 44(8): 1421-1427 (1997).

[18] Soler L., Canellas J., SauraCalixto F.J., Oil Content and Fatty Acid Composition of Developing Almond Seeds, Agric. Food Chem.36:695-697 (1988).

[19] Matthaus B., Özcan M.M., Fatty Acid Composition, Tocopherol and Sterol Contents in Linseed (LinumusitatissimumL.) Varieties, Iran. J. Chem. Chem. Eng. (IJCCE), 36:147-152 (2017).