Browsing by Author "Kıralan, Mustafa"
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Antioxidant properties of thymol, carvacrol, and thymoquinone and its efficiencies on the stabilization of refined and stripped corn oils
Yıldız, Şeyma; Turan, Semra; Kıralan, Mustafa; Ramadan, Mohamed Fawzy (Springer, 2021)The antioxidant activities of natural phenolic compounds (thymol, carvacrol, and thymoquinone) were compared with commercial antioxidants (alpha-tocopherol, BHT, and BHA) using DPPH center dot, conjugated diene (CD) in the ... -
Bioactive lipids, antiradical activity and stability of rosehip seed oil under thermal and photo-induced oxidation
Turan, Semra; Solak, Rukiye; Kıralan, Mustafa; Ramadan, M. F. (Consejo Superior Investigaciones Cientificas-Csic, 2018)In the present report, the fatty acids, tocopherols, and sterol profiles as well as the total phenolics and carotenoids of rosehip (Rosa canina) seed oil were determined. The major fatty acids in the oil were linoleic and ... -
Bitkisel yağların stabilizasyonunda doğal antioksidanların rolü
Kıralan, Mustafa; Bayrak, Ali (2005)Oksidasyon, yağların bozulmasında en önemli reaksiyonlardan biridir. Oksidasyonu önlemek için en yaygın ve en etkili yöntem antioksidan kullanımıdır. Sentetik antioksidanların sağlık üzerine birçok olumsuz etki göstermesi ... -
Blends of cold pressed black cumin oil and sunflower oil with improved stability: a study based on changes in the levels of volatiles, tocopherols and thymoquinone during accelerated oxidation conditions
Kıralan, Mustafa; Ulaş, Merve; Özaydın, Ayşegül; Özdemir, Necla; Özkan, Gülcan (Wiley, 2017)Blends (5%, 10% and 20%, w/w) of cold-pressed black cumin (Nigella sativa) oil (BCO) with sunflower oil (SO) were formulated. Oxidative stability (OxS) of SO and blends during storage at thermal accelerated oxidation ... -
Changes in hexanal, thymoquinone and tocopherols levels in blends from sunflower and black cumin oils as affected by storage at room temperature
Kıralan, Mustafa; Ulaş, Merve; Özaydın, Ayşe G.; Özdemir, Necla; Özkan, Gülcan (Innovhub Ssi-Area Ssog, 2016)The aim of this study was to investigate the oxidative stability (OxS) of oil blends formulated from sunflower oil (SO) and cold pressed black cumin oil (BCO) stored at room temperature for 6 months. Blends (5%, 10% and ... -
Changes in volatile compounds of black cumin oil and hazelnut oil by microwave heating process
Kıralan, Mustafa; Kıralan, S. Sezer (Springer, 2015)Black cumin and hazelnut oils were subjected to a heating process in a microwave oven for a duration of 2, 4, 6 and 8 min at a constant frequency of 2450 MHz and a power of 0.45 kW. The ultraviolet absorption and volatile ... -
Comparison of antiradical activities and compositions of essential oils of two Origanum spp. from Turkey
Hydro-distilled essential oils from the aerial parts of Origanum vulgare L. subsp. hirtum (Link) Letsw. (OVH) and Origanum onites L. (OO) were analyzed by GC/MS. Twelve compounds comprising 98.89% of the (OVH) essential ... -
Çemen otu (Trigonella foenum-graecum L.) tohumunun yağ asitleri ve sterol bileşimi
Üç farklı ilden alınan çemen otu tohumlarının yağ verimi, yağ asitleri ve sterol bileşimi incelenmiştir. Çemen otu tohumlarından çözücü ekstraksiyonu ile yağ elde edilmiş ve oranı %7.01-8.82 aralığında belirlenmiştir. ... -
Çeşit, Olgunluk ve Yoğurma Şartlarının Zeytinyağı Verimi, Bazı Kalite Parametreleri ve Aroma Profili Üzerine Etkisi
Çevik, Şerife; Özkan, Gülcan; Kıralan, Mustafa (2015)Son yıllarda, besleyici değerinin yüksek olması ve sağlık üzerine olumlu etkileri nedeniyle Akdeniz diyetinin vazgeçilmezi olan zeytinyağına talep artmıştır. Zeytinyağının aroma, tat ve renk kalitesi tüketici algısına göre ... -
Determination of aroma profiles of olive oils from Turkish olive cultivars
Bayrak, Ali; Kıralan, Mustafa; Kara, Hasan Hüseyin (Wiley, 2013)This study analyzed volatile aromatic compounds present in the oils of Turkish olive cultivars. The cultivars Gemlik, AyvalA +/- k, Memecik, Domat, Uslu, HalhalA +/-, Kilis yaglA +/- k, Nizip yaglA +/- k, HaAYebi and ... -
Effect of cultivar and harvest time on C-6 and C-5 volatile compounds of Turkish olive oils
Karagöz, Sermin Göksu; Yılmazer, Mustafa; Özkan, Gülcan; Carbonell-Barrachina, Angel A.; Kıralan, Mustafa (Springer, 2017)Aroma is an important quality criterion for extra virgin olive oil. The goal of this study was to determine C-6 and C-5 volatile compounds in different Turkish olive oils. Two factors namely (1) olive cultivar including ... -
Effect of different drying methods on the essential oil yield, composition and antioxidant activity of Origanum vulgare L. and Origanum onites L.
Özdemir, Necla; Özgen, Yasin; Kıralan, Mustafa; Bayrak, Ali; Arslan, Neşet (Springer, 2018)Origanum onites and Origanum vulgare are important medicinal plants because of their flavoring, therapeutic, and preservative properties. Drying methods are important for obtaining high quality essential oil from spices. ... -
The effect of different harvest stages on chemical composition and antioxidant capacity of essential oil from Artemisia annua L.
Chemical composition of the essential oils obtained by hydro-distillation from Artemisia annua L. (Asteraceae) harvested before fowering (BF), 50% of fowering (50%F), full fowering (FF), and after fowering (AF) stages were ... -
Effect of hazelnut roasting on the oil properties and stability under thermal and photooxidation
Özkan, Gülcan; Kıralan, Mustafa; Karacabey, Erkan; Çalık, Gürkan; Özdemir, Necla; Tat, Tuba; Bayrak, Ali (Springer, 2016)The roasting process plays a key role in hazelnut oil production. The optimal roasting conditions for Delisava and Kara FA +/- ndA +/- k hazelnut cultivars were studied using response surface methodology (RSM). The maximum ... -
Effect of thermal and photo oxidation on the stability of cold-pressed plum and apricot kernel oils
Kıralan, Mustafa; Kayahan, Mustafa; Kıralan, Sündüz Sezer; Ramadan, Mohamed Fawzy (Springer, 2018)Oxidative stability of cold-pressed plum (Prunus domestica) kernel oil (PKO), and apricot (Prunus armeniaca) kernel oil (AKO) were evaluated under thermal-oxidation and photo-oxidation conditions. Changes in peroxide value ... -
Effect of thymoquinone and tocopherols on the oxidative stability of purified Nigella sativa oil
Turan, Semra; Dilmen, Şeyma; Kıralan, Mustafa; Özaydın, Ayşe G.; Özkan, Gülcan; Ramadan, Mohamed Fawzy (Innovhub Ssi-Area Ssog, 2020)The effect of minor bioactive constituents (alpha-, gamma-tocopherol and thymoquinone) and the binary and ternary mixtures of those constituents on the oxidative stability of purified black cumin oil (PBCO) was evaluated. ... -
Effects of natural phenolics and synthetic antioxidants on the oxidative thermal stability of refined and purified sunflower oils
Yıldız, Şeyma; Dilmen, Şeyma; Turan, Semra; Kıralan, Mustafa; Ramadan, Mohamed Fawzy (Innovhub Ssi-Area Ssog, 2021)The antioxidant activity of phenolic compounds [thymol (T), carvacrol (C), and thymoquinone (TQ)] was compared with commercial antioxidants [butylated hydroxyanisole (BHA), butylated hydroxytoluene (BHT) and alpha-tocopherol] ... -
Ege Bölgesi zeytinyağlarında altı karbonlu uçucu aroma bileşenlerinin belirlenmesi
Yağ üretimi açısından önemli olan Ege bölgesi illerinden (Muğla, Aydın, İzmir ve Manisa) Gemlik, Memecik, Ayvalık, Uslu ve Domat zeytin çeşitlerinden 2007-2008 ve 2008-2009 dönemi olmak üzere 2 yıl hasat edilmiştir. Hasat ... -
Ege Bölgesi zeytinyağlarının fenolik bileşenleri
Bu çalışmada, Türkiye’de başlıca zeytin yetiştiriciliği yapan Ege bölgesinin bazı illerinden (Muğla, Aydın, İzmir ve Manisa) 2 hasat dönemi (2007-2008 ve 2008-2009) süresince yerli zeytin çeşitlerinin (Gemlik, Memecik, ... -
Enhancement of sunflower oil stability during deep-frying using extracts from olive oil by-products and soy lecithin
Köroğlu, Deniz Günal; Turan, Semra; Kıralan, Mustafa; Ramadan, Mohamed Fawzy (Univ Putra Malaysia Press, 2019)The potential application of olive mill wastewater (OMWW) and olive pomace (OP) extracts with lecithin (L) as antioxidants to enhance the stability of refined sunflower oil (SFO) during deep-frying (at 180 degrees C) was ...
