As a member of nuts, walnut is consumed from snacks to salads and desserts to entrees and an importantpart of human diet for centuries. Walnut biological and nutritional value is also enhanced by its valuable protein and rich in nutrient composition such as vitamins and minerals. The most important characteristic of walnut oil is the abundance of polyunsaturated fatty acids, which makes it a unique food because of high amount of linoleic acid. Due to having valuable protein, vitamins and minerals it enhances biological and nourishment value, also. Recent epidemiological studies showed that consumption of walnut reduce cardiovascular diseases due to the rich in antioxidant properties, valuable fatty acids and tochopherols contents. In Turkey, walnut production and consumption increases year by year. The kernel of walnut genotypes shows variability in terms of their fat, fatty acid and tocopherol profiles. In this paper, it was aimed to characterize 10 walnut (Juglans regia L.) cultivars (Bilecik, Chandler, Hartley, Howard, Maraş 12, Maraş 18, Midland, Pedro, Şen and Serr) based on their fatty acid profiles using GC (Gas Chromatography), tocopherol and its isomers by HPLC (High Performance Liquid Chromatography) and total phenol content with spectrometric methods. Among the walnut cultivars "Hartley" was the highest linoleic acid (64.56%) and "Howard" was the α-linolenic acid 13.26 (%). The highest values of α (38.76 µg/g), β + γ (312.19 µg/g) and δ-tocopherol (40.77 µg/g) and total phenol (349 mg GAE/100 g ext) content were detected in "Sen" cultivar. Obtained results might be significant for further breeding programme to imHow to cite this paper: Kafkas, E., Burgut, A., Ozcan, H., Ozcan, A., Sutyemez, M., Kafkas, S.

There are seed propagated walnut (Juglans regia L.) populations with the vast genetic variation in different part of Turkey. There are also lots of monoecious and dichogamous genotypes in Turkey due to continuing sexual propagation. In this study, fruits of 19 selected walnut genotypes grown in Kahramanmaraş region were characterized based on their fat, fatty acid and tocopherol contents. The fatty acids content of genotypes were analyzed using Gas Chromatography. Tocopherol analyses such as alpha (α)-Tocopherol, gamma (γ) and beta (β) + delta (δ) were performed by HPLC technique. According to the total fat and fatty acid results, there were differences among genotypes on most of the fatty acids. Total fat ranged from 51.2 to 82.1%, stearic acid from 2.57 to 3.37%, myristic acid from 0.00 to 0.05%, palmitic acid from 6.42 to 7.92%, arachidic acid from 0.00 to 0.16%, linoleic acid from 53.23 to 63.62%, linolenic acid from 10.75 to 15.24%, oleic acid from 14.73 to 24.17% and palmitoleic acid from 0.00 to 0.16%, respectively. The same genotypes were evaluated based on their tocopherol content and (α)-Tocopherol, gamma (γ) and beta (β) + delta (δ) tocopherol were found between 23.47 and 38.04 μg/g, 161.09 and 292.56 μg/g and 16.93 and 32.34 μg/g, respectively.

The 'Sweet Lemon' and 'Interdonato' lemon lemon" i "interdonato" su 0,24-8,86%, 62,25-55,50mg/100g and 1,93-0,09 %, redom. Ova studija je pokazala da pozitivni zdravstveni efekti sorti limuna mogu da budu vezani za L-askorbinsku kiselinu i fenolne komponente, uglavnom zbog antioksidantnog efekta.Ključne reči: 'sweet lemon ','interdonato", sećer, fenoli, antioksidanti, L-askorbinske kiseline, organske kiseline.

Besides being the largest hazelnut producer in the world, Turkey was also the foremost hazelnut exporting country. In this study, content of essential metals (Na, Mg, Ca, K, Fe) and toxic metals (Cu, Pb, Cd) in hazelnut samples from eastern and western parts of Black Sea Region in Turkey were analyzed, and the relationship among these metals were investigated. In addition, the estimated daily intake (EDI) of heavy metals was calculated. It was shown that the calculated EDI values for daily average consumption (20 g) were lower than the recommended values for Cu. Moreover, Cd and Pb were not detected in any of the samples. Potassium was observed to have the highest concentration with an average of 2348.37 mg·kg -1 among the investigated elements. In addition, Ca and Mg contents in hazelnut samples were also found to be rather high.