Abstract
The oil yields of hazelnut kernels collected from Germany (Munster) and Turkey range from 8.1 to 64.1%. The main fatty acids in hazelnut kernel oils are oleic (76.382.6%), linoleic (6.514.0%), and palmitic (5.76.5%). The hazelnut kernel oils contained an appreciable amount of a-tocopherol (19.963.9?mg/100?g), with a mean value of 40.02?mg/kg, and ?-tocopherol (1.315.5?mg/100?g), with a mean value of 4.84. a-Tocopherol was the predominant tocopherol in all hazelnut kernels. The major sterols were beta-sitosterol, ranging from 78.13 to 82.56?mg/kg; campesterol, ranging from 4.79 to 7.42?mg/kg; and d5-avanasterol, ranging from 1.26 to 5.24?mg/kg. The highest minerals were K and P followed by Ca, Mg, Na, and Zn. P contents of all samples were established between 2029.90 and 4376.66?ppm. The results may also be useful for the evaluation of nutritional information. As a result, the present study showed that the kernels of hazelnut are a potential source of valuable oil which might be used for food and non-food applications. In addition, hazelnut kernel oil has a high nutritive value and can be recommended for processing of healthy food products.