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Öğe Chemical and antioxidant properties of pomegranate cultivars grown in the Mediterranean region of Turkey(Elsevier Sci Ltd, 2008) Ozgen, Mustafa; Durgac, Cokun; Serce, Sedat; Kaya, CemalArils from six pomegranate (Punica granatum L.) cultivars obtained from various sites from the Mediterranean region of Turkey were evaluated for their chemical and antioxidant properties. These properties included total phenolics (TP), total monomeric anthocyanins (TMA), soluble solids (TSS), titratable acidity (TA), individual sugars and organic acids. Antioxidant capacities of arils were determined by both the ferric reducing antioxidant power (FRAP) and trolox equivalent antioxidant capacity (TEAC) assays. The antioxidant capacities averaged 5.60 and 7.35 mmol TE/I by the TEAC and FRAP methods. Variability among cultivars was greatest for TMA content (CV 132%): individuals ranged from 6.1 to 219 mg cy3-Gluc 1(-1). TP means averaged 1507 mg GAE/l Levels of FRAP, TEAC, TP, and TMA were strongly correlated (r = 0.82-0.96). The major sugars were fructose (6.4 g/100 ml) and glucose (6.8 g/100 ml), the major acids were citric (1.78 g/100 ml) and malic (0.12 g/100 ml). (c) 2008 Elsevier Ltd. All rights reserved.Öğe Determining total phenolic content and total antioxidant capacity of loquat cultivars grown in Hatay(Wolters Kluwer Medknow Publications, 2010) Polat, A. Aytekin; Caliskan, Oguzhan; Serce, Sedat; Saracoglu, Onur; Kaya, Cemal; Ozgen, MustafaSeveral fruit characteristics of five loquat (Eriobotrya japonica (Thunb.) Lindl.) cultivars/selections grown in Dortyol, Hatay, Turkey were investigated in 2008. The cultivars/selections included 'Baduna 5', Guzelyurt 1, 'Hafif Cukurgobek', 'Ottaviani,' and Type 1. The characteristics evaluated included fruit weight, width, length, seed number and weight, flesh/seed ratio, total soluble solids (TSS), pH, acidity, total phenolic (TP) content, and total antioxidant capacity (TAC), determined by the ferric reducing antioxidant power ( FRAP) assay. The analyses were conducted by three replicates, with 30 fruits in each replicate. The results indicated that there were significant differences among the cultivars, for all the traits tested. For example, 'Hafif Cukurgobek' and 'Ottaviani' had smaller fruits than others, although 'Hafif Cukurgobek' had heavier seeds. The flesh/seed ratio was the highest in Type 1, while 'Hafif Cukurgobek' had the highest pH and high soluble solids. 'Baduna 5' and 'Hafif Cukurgobek' had the highest acidity. The TP ranged from 129 ('Baduna 5') to 578 ('Hafif Cukurgobek') mg gallic acid equivalent (GAE)/kg fresh fruit (fw). 'Hafif Cukurgobek' also had the highest FRAP mean (12.1 mmol Trolox Equivalent (TE)/kg fw). The results suggest that loquat cultivars have a variable range of TP content and a relatively high total antioxidant capacity, which is crucial for human health.Öğe Dicle Üniversitesi hastaneleri özürlü kuruluna başvuran olguların incelenmesi(2013) Uysal, Cem; Bulut, Mahmut; Kaya, Cemal; Güneş, Mehmet; Bez, Yasin; Zeren, Cem; Taş, Cuma; Uyar, Betül; Karaaslan, Bekir; Gören, SüleymanAmaç: Dünya Sağlık Örgütü (DSÖ) gelişmiş ülkelerde nüfusun %10’unu, gelişmekte olan ül- kelerde ise %12’sini özürlü bi- reylerin oluşturduğunu kabul etmektedir. Türkiye İstatistik Kurumu (TUİK)’nun yapmış ol- duğu “2002 Türkiye Özürlüler Araştırması” sonuçlarına göre ülkemizde özürlü olan nüfu- sun toplam nüfus içindeki ora- nı %12,29 idi. Bu çalışmamız da özürlülerle ilgili ülkemiz verile- rine katkıda bulunmak amacıyla yapılmıştır. Yöntemler: Hastanemiz özürlü kuruluna 2011 yılı Ocak - Aralık aylarında başvuran 1805 vakaya ait dosya- lar geriye dönük olarak değer- lendirilmiştir. Bulgular: 1805 vakanın %45,4’ ü (820 kişi) kadın %54,6’ sı (985 kişi) ise erkekti. En fazla başvuru 228 (%12,6) vaka ile Mart ayında gerçekleşmişti. %50’den daha az özrü olduğuna karar verilen 1173 (%65) vaka varken, kalan 541 (%30) vakanın özrünün %50 ve üzerinde olduğu tespit edil- miştir. Verilen özür oranlarının süreleri incelendiği zaman; Tüm başvurular içerisinde 873 olgu- nun (%48,4) sürekli özre sahip olduğu görülmüştür. Sonuç: Özürlülüğe yol açan etmenler minimuma indirilmelidir. Alına- cak tedbirler sadece büyükşe- hir kent merkezinde değil diğer küçük yerleşim bölgelerinde de uygulanmalıdır.Öğe Effect of scale color on the antioxidant capacity of onions(Elsevier Science Bv, 2010) Gokce, Ali Fuat; Kaya, Cemal; Serce, Sedat; Ozgen, MustafaThe bulb onion (Allium cepa L.) has been cultivated for thousands of years and used as an important component of human diet. Recent studies suggest that onions can be used to cure, reduce, or prevent some of the health problems such as cancer, cardiovascular diseases, antidiabetic, asthma, antibiosis, and prebiotic effects due to its high antioxidant effect. In this Study, we determined the antioxidant capacities of a wide range of onion cultivars: nine commercial cultivars and five advance selections differing in color. The variables tested include bulb size, scale color,, total phenolic (TP), total antioxidant activity determined by both Ferric reducing ability of plasma (FRAP) and Trolox equivalent antioxidant capacity (TEAC). We found that yellow onion had the greatest TP content (3.7 mg GAE/g dw); and, the red group had higher TP mean than the white group (2.2 mg GAE/g dw vs. 1.1 mg GAE/g dw). For the antioxidant capacity measurements, the red group had the greatest means by both methods (15.4 mu mol TE/g dw and 9.3 mu mol TE/g dw for TEAC and FRAP). Yellow onions had higher TEAC (14.7 mu mol TE/g dw vs. 8.7 mu mol TE/g dw) and FRAP values (9.8 mu mol TE/g dw vs. 5.6 mu mol TE/g dw) than white onions. Among the cultivars tested great differences of TP, TEAC and FRAP was observed. The TP content of Me-Tan 88 (8.3 mg GAE/g dw) was two times higher than the yellow group. Yellow color Dayton had the greatest TEAC (20.5 mu mol TE/g dw) and FRAP (123 mu mol TE/g dw) means followed by yellow color Me-Tan 88 (19.4 and 11.4 mu mol TE/g dw). The two antioxidant measurements were found to be highly correlated (0.99) where absolute values of FRAP were about 40% less than those of TEAC. The values of TEAC and FRAP were significantly correlated by TP with similar rs (0.74 and 0.73, respectively). TP, TEAC and FRAP were significantly and positively correlated to Soluble solids (0.41, 0.43, and 0.40, respectively). Our results suggested that the red onions had higher antioxidant activities than yellow and white onions although yellow onions had the richest phenolic contents. (C) 2009 Elsevier B.V. All rights reserved.Öğe Phytochemical accumulation and antioxidant capacity at four maturity stages of cranberry fruit(Elsevier Science Bv, 2008) Celik, Hueseyin; Ozgen, Mustafa; Serce, Sedat; Kaya, CemalSpecific components of cranberry fruit are being associated with human health attributes, such as maintenance of urinary tract health and antioxidant status. Some of the chemical properties and antioxidant capacity of cranberry (Vaccinium macrocarpon Ait. cv. Pilgrim) fruits were investigated at light green, blush, light red and dark red maturation stages. Fruit total phenolics, total monomeric anthocyanins, soluble solids, titratable acidity and individual organic acids were examined. Antioxidant capacity of fruits were determined by both the ferric reducing antioxidant power (FRAP) and trolox equivalent antioxidant capacity (TEAC) assays. The fruit color was measured using a portable chromameter. A converse relationship was found between total phenolics and anthocyanin as fruits mature. Total phenolic concentration was declined from 7990 to 4745 mg GAE/kg fw, while total monomeric anthocyanin content was increased from 0.8 to 111.0 mg/kg fw from green to dark red stage. Brix was increased from 6 to 9.3% as well. The main organic acid was citric acid determined by the HPLC method. The antioxidant capacity of cranberries decreased to light red stage; when a fruit accumulates more anthocyanin the activity increased again in both FRAP and TEAC methods. Averaged antioxidant capacity measured was 12.61 and 17.48 mmol TE/kg fw by FRAP and TEAC methods. (C) 2008 Elsevier B.V. All rights reserved.Öğe Phytochemical and antioxidant properties of anthocyanin-rich Morus nigra and Morus rubra fruits(Elsevier, 2009) Ozgen, Mustafa; Serce, Sedat; Kaya, CemalIn this study, phytochemical and antioxidant properties of anthocyanin-rich mulberry species of Morris nigra L. (black mulberry) and Mortis rubra L. (red mulberry) fruits harvested from across Turkey were investigated. Fruit color, total phenolics (TP), total monomeric anthocyanin (TMA), titratable acidity (TA), and individual sugar and organic acid compositions were determined. Total antioxidant capacity (TAC) of fruits was assessed by both the trolox-equivalent antioxidant capacity (TEAC) and the ferric reducing antioxidant power (FRAP) assays. Black mulberry exhibited higher TP, TMA, TAC and TA when compared to red mulberry. The average TP contents of M. nigra and M. rubra were 2737 and 1603 mu g gallic acid equivalent in g fresh weight basis (GAE/g fw), respectively. M. nigra had the richest amount of anthocyanin with an average of 571 mu g cy-3-glu/g fw. Overall, TAC averaged 10.5 and 12.0 mmol TE/L by the TEAC and FRAP methods, respectively. We found that FRAP, TEAC, TP and TMA were significantly correlated (r = 0.64-0.99) with each other. Fructose (5.27 g/100 mL) and glucose (5.81 g/100 mL) were determined to be the major sugars in both mulberries. M. nigra displayed a higher TA (2.05 g/100 mL) than M. rubra (0.78 g/100 mL), with citric acid as the major acid. (c) 2008 Elsevier B.V. All rights reserved.
