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    Effect of oven drying on antioxidant activity, phenolic compounds, fatty acid composition and tocopherol contents of pomegranate aril and oils
    (WILEY, 2019) Özcan, Mehmet Musa; Al Juhaimi, Fahad Y.; Uslu, Nurhan; Ahmed, Isam A. Mohamed; Osman, Magdi A.; Gassem, Mustafa A.; Salih, Hesham A. A.
    The antioxidant activity of Hicaznar and 33 N 16Keben varieties changed between 32.213% and 68.492% and between 47.885% and 85.195%, respectively (p < 0.05). Gallic acid, 3,4-dihydroxybenzoic acid, (+)-catechin, 1,2-dihydroxybenzene, and isorhamnetin were the key phenolic compounds of Hicaznar and 33 N 16Keben arils. While oil contents of Hicaznar aril change between 6.78% (control) and 9.71% (20 hr), oil contents of 33 N 16Keben aril varied between 7.19% (control) and 10.96% (control). Punicic was the predominant fatty acid in two pomegranate cultivar oils. While punicic acid contents of Hicaznar aril oil vary between 75.23 (20 hr) and 75.85% (control), punicic acid contents of 33 N 16Keben oil changed between 73.81 (20 hr) and 74.79% (control). gamma-tocopherol contents of Hicaznar aril oil are determined between 224.86 (20 hr) and 227.84 mg/100 g (control), gamma-tocopherol contents of 33 N 16Keben aril oil changed between 284.36 (20 hr) and 289.44 mg/100 g (control). Practical applications Pomegranate is one of the most important fruits. For a long time the preservation is very difficult as fresh. The dried fruit should be rehydrated and its usefulness should be investigated. This form can be used as compost or fruit juice by rehydrating the dried product further. The change in the bioactive properties of the post-drying product will also be demonstrated.
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    Effect of varieties on bioactive compounds, fatty acids, and mineral contents in different grape seed and oils from Bosnia and Herzegovina
    (WILEY, 2019) Banjanin, Tijana; Özcan, Mehmet Musa; Al Juhaimi, Fahad; Rankovic-Vasic, Zorica; Uslu, Nurhan; Mohamed, Isam A.; Ghafoor, Kashif; Babiker, Elfadıl E.; Osman, Magdi A.; Gassem, Mustafa A.; Salih, Hesham A. A.
    This work aimed to evaluate the phytochemical properties of grape seeds and oils of autochthonous variety Blatina, regional variety Vranac and international varieties Merlot, Cabernet, and Muscat cultivated in Herzegovina province. It is estimated that total phenol contents and antioxidant activities of seed extracts ranged between 502.08 (Merlot)-693.33mgGAE/kg (Blatina) and 86.68 (Muscat)-90.76% (Cabernet), respectively. The values for 1,2-dihydroxybenzene and (+)-catechin in seed extracts changed between 42.32 (Blatina)-450.16mg/100g (Muscat) and 56.52 (Cabernet)-960.00mg/100g(Vranac), respectively. Linoleic and oleic acid contents of grape seed oils were between 61.30(Cabernet)-67.84%(Merlot) and 19.87 (Merlot)-24.53% (Blatina), respectively. gamma-Tocopherol contents of seed oils were in the range of 1.84 (Cabernet and Blatina)-2.04mg/g(Merlot). The P and K mineral contents of seeds varied from 3,731.0 (Blatina) to 4,309.3mg/kg (Muscat) and 10,033 (Cabernet) and 16,674mg/kg (Blatina), respectively. Practical applicationsIn this paper, analysis of the grape seeds and oils are presented. Following grape varieties are grown in Herzegovina are analyzed: autochthonous variety Blatina, regional variety Vranac and international varieties Merlot, Cabernet, and Muscat. They are analyzed in terms of the total content of phenol, individual phenols, antioxidant activity, and minerals of grape seed extract. Grape seed oil was also examined for the content of tocopherols and fatty acids. The main interest in oil and seed are the high content of phenol, linoleic acid, and tocopherol used in the pharmaceutical. Based on the presented results it will be possible to compare characteristics of the grape seeds and oils of autochthonous, regional and international varieties.
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    Effects of cold-press and soxhlet extraction systems on antioxidant activity, total phenol contents, fatty acids, and tocopherol contents of walnut kernel oils
    (JAPAN OIL CHEMISTS SOC, 2019) Ahmed, Isam A. Mohamed; Al-Juhaimi, Fahad Y.; Özcan, Mehmet Musa; Osman, Magdi A.; Gassem, Mustafa A.; Salih, Hesham A. A.
    In this study, physico-chemical properties, fatty acid composition, and tocopherol contents of several walnut kernel oils obtained through cold-press and Soxhlet extractions were investigated. The acidity, peroxide, and unsaponifiable matter of oil samples extracted in the Soxhlet system were found higher. Total phenol contents of the oils obtained in cold press and Soxhlet extraction systems were 121.9 mg GAE/100g (Kaman-2) and 154.6 mg GAE/ 100g (Buyukoba), and between 135.9 mg GAE/100g (Kaman-2) and 163.8 mg GAE/100g (Buyukoba), respectively (p < 0.05). In addition, antioxidant activity valuesof walnut oils obtained in cold press and Soxhlet extractions varied between 17.3% (Kaman-2) and 19.7% (Kaman-5), and between 18.4% (Kaman-2) and 23.8% (Buyukoba), respectively (p < 0.05). Linoleic acid contents of the oil samples extracted in cold-press varied between 55.19% (Kaman-5) and 56.71% (Kaman-2), while that extracted from Soxhlet extraction system varied between 54.47% (Kaman-2) and 55.93% (Buyukoba). gamma-Tocopherol contents of walnut oils extracted in cold press and Soxhlet extraction ranged between 9.41 mg/100g (Buyukoba) and 10.83 mg/100g (Kaman-2), and 8.76 mg/100g (Kaman-5) and 9.33 mg/100g (Kaman-2), respectively, and were statistically significant (p < 0.05).