Browsing by Author "Turan, Semra"
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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 ... -
Determination of the changes in sunflower oil during frying of leavened doughs using response surface methodology
Turan, Semra; Keskin, Şule; Solak, Rukiye (Springer India, 2021)In this study, the effect of dough salt content, frying temperature and time on the conjugated diene values, polymer triglyceride content, total polar material content, viscosity, and color values of the sunflower oil ... -
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] ... -
Effects of olive wastewater and pomace extracts, lecithin, and ascorbyl palmitate on the oxidative stability of refined sunflower oil
Günal, Deniz; Turan, Semra (Wiley, 2018)In this study, the effects of olive mill wastewater (OMW) and olive pomace (OP) extracts (1 and 2 mg/g), lecithin (L, 1-5 mg/g), and ascorbyl palmitate (AP, 0.2 mg/g) on the oxidative stability of refined sunflower oil ... -
Effects of some plant extracts on the oxidative stability of canola oil and its purified triacylglycerols
Turan, Semra (Wiley-Hindawi, 2014)In this study, the effects of rosemary (Rosmarinus officinalis L.), thyme (Thymus vulgaris L.), sage (Salvia officinalis L.) and bay (Laurus nobilis) extracts on the oxidative stability of canola oil and its purified ... -
Efficacy of rosemary (Rosmarinus officinalis L.) powder and extracts in the protection of refined and stripped hazelnut oil
Tohma, Serdar; Köroğlu, Deniz Günal; Turan, Semra; Ramadan, Mohamed Fawzy (SPRINGER-VERLAG ITALIA SRL, 2021)In this study, the antioxidant activity of rosemary (Rosmarinus officinalis L.) extracts or dried rosemary on the oxidative stability of hazelnut oil and its purified triacylglycerols (TAGs) was investigated. The antioxidant ... -
Efficiency of various plant essential oils in stabilization of canola oil and of its purified triacylglycerols
Turan, Semra (Taylor & Francis Inc, 2014)In this study, the efficacy of thyme (Thymus vulgaris L.), sage (Salvia officinalis L.), rosemary (Rosmarinus officinalis L.) and bay (Laurus nobilis) essential oils in stabilizing canola oil and its purified triacylglycerols ... -
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 ... -
Fatty acid, triacyl glycerol, phytosterol, and tocopherol variations in kernel oil of Malatya apricots from Turkey
Turan, Semra; Topcu, Ali; Karabulut, İhsan; Vural, Halil; Hayaloğlu, Ali Adnan (Amer Chemical Soc, 2007)The fatty acid, sn-2 fatty acid, triacyglycerol (TAG), tocopherol, and phytosterol compositions of kernel oils obtained from nine apricot varieties grown in the Malatya region of Turkey were determined (P < 0.05). The names ... -
Gıdalarda Monokloropropandiol Esterlerinin Oluşumu ve Belirlenmesi
Turan, Semra; Solak, Rukiye; Keskin, Şule (2018)MCPD (monokloropropandiol) esterleri rafine yağlarda ve yağlı gıdalarda varlığı saptanan ısıl işlem kontaminantlarından biridir. Özellikle yağ ve tuz içeren ürünlerin yüksek sıcaklıklarda işlem görmesi sonucu oluşmaktadırlar. ... -
Improving olive oil quality with double protection: Destoning and malaxation in nitrogen atmosphere
Yorulmaz, Aslı; Tekin, Aziz; Turan, Semra (Wiley, 2011)Effect of destoning and malaxation in nitrogen atmosphere on oxidative stability, fatty acid and sterol composition of extra virgin olive oil (EVOO) were investigated in industrial scale. Olives of 'Edremit yaglik' cultivar ... -
Interaction of lentil protein and onion skin phenolics: Effects on functional properties of proteins and in vitro gastrointestinal digestibility
Köroğlu, Deniz Günal; Turan, Semra; Çapanoglu, Esra (Elsevier, 2022)The effect of protein–phenolic interactions on the functional properties of lentil protein and in vitro gastrointestinal digestibility in different systems (extract solution, protein–phenolic solution, and emulsion) was ... -
Investigation of the formation of free and bound 2-and 3-monochloropropane-1,2-diols during deep frying of leavened dough using response surface methodology
Turan, Semra; Solak, Rukiye; Keskin, Şule (Wiley, 2019)This study aims to determine the effects of frying temperature, frying time, and salt content of dough on free and/or ester-bound 2- and 3-monochloropropanediols (MCPD) content of leavened dough and frying oil using response ... -
Oxidative stabilisation of sunflower oil enriched with olive mill wastewater and olive pomace phenolics-rich extracts with soy lecithin
Köroğlu, Deniz Günal; Turan, Semra; Kıralan, Mustafa; Ramadan, Mohamed Fawzy (Innovhub Ssi-Area Ssog, 2019)Olive oil industry generates huge amounts of by-products that are discarded and can be a serious environmental problem. In this study, the antioxidant activity of olive mill wastewater (OMWW), and olive pomace (OP) extracts ... -
Physical characteristics of black cumin oil emulsions compared to sunflower and corn oils emulsions
Varlı, Mücahit; Solak, Rukiye; Turan, Semra; Ramadan, Mohamed Fawzy (SPRINGER, 2021)This study aimed to investigate the physical properties of black cumin oil (Nigella sativa) emulsions at different oil: water (w/w) ratios. Black cumin oil (BCO) emulsions were prepared as 80:20, 70:30, 60:40 (w/w) water ... -
Protein-phenolic interactions in lentil and wheat crackers with onion skin phenolics: Effects of processing and in vitro gastrointestinal digestion
Köroğlu, Deniz Günal; Turan, Semra; Çapanoğlu, Esra (Royal Soc Chemistry, 2023)This study aimed to evaluate the protein-phenolic interaction in functional crackers made of wheat/lentil flour with onion skin phenolics (onion skin powder: OSP, onion skin phenolic extract: OSE, or quercetin: Q) after ... -
Purification of used sunflower frying oil with adsorbent mixtures using an active filtration method
Turan, Semra; Yalçuk, Arda; Şişlioğlu, Kübra; Hassanien, Mohamed Fawzy Ramadan (Innovhub Ssi-Area Ssog, 2019)In this study, purification of used frying sunflower oil was investigated using different adsorbents and their mixtures. The effective adsorbents in reducing the free fatty acid (FFA) content, total polar material (TPM) ... -
Regeneration of used frying oil
Turan, Semra; Yalçuk, Arda (Springer, 2013)Used frying oils were purified in a packed column using different amounts of silica gel (SG), aluminum oxide (AO), activated charcoal (AC), bentonite (B), magnesol XL (M), calcium carbonate (CC), zeolite (Z), bleaching ...
