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    Öğe
    Box-Behnken design based optimization of phenolic extractions from Polygonum equisetiforme roots linked to its antioxidant and antibacterial efficiencies
    (Frontiers Media Sa, 2023) Elgudayem, Farah; Aldiyab, Abdullah; Albalawi, Marzough Aziz; Omran, Awatif; Kafkas, Nesibe Ebru; Saghrouchni, Hamza; Var, Isil
    PurposeThe Polygonum equisetifome is a prospective plant source of high protein, unsaturated fatty acids, and useful safe bioactive molecules. Therefore, the aim of this study was to optimize the ultrasonic aqueous extraction of phenols from P. equisetifome roots using Box-Behnken design based statistical modeling, and to evaluate the antioxidant and antibacterial efficiencies of P. equisetifome root extracts against pathogenic bacteria. MethodsIn this study, the box-behnken design was used to optimize the extraction of phenols. The extraction temperature (30-70 degrees C), ultrasound assisted extraction (UAE) time (1-9 min), and liquid-solid ratio (35-45 mL/g) were investigated as the factors that influence the phenolic yield (Y1) and their DPPH (1,1-diphenyl-2-picrylhydrazyl) scavenging activity (Y2). ResultsThe optimal conditions for both responses were 50 degrees C, 5 min, and 40 mL/g. At these conditions, Y1 reached its maximum to be 45.321 mg GAE/g dry weight and Y2 to be 120.354 mu mol Trolox/g dry weight. The P. equisetifome roots contained water soluble phenol, high anthocyanin, and condensed tannins. Interestingly, the P. equisetifome extracts showed a relation to its antioxidant and antibacterial activities, FRAP (Ferric-reducing/antioxidant power), and ABTS scavenging activity were determined. The morphological and physico-chemical features of the extract were analyzed using SEM-EDX, FT-IR, and minimum inhibitory concentration (MIC) was analyzed against several pathogenic bacteria. The antibacterial activity of the extract showed that the extract is more efficient against Staphylococcus aureus, while the P. equisetifome extracts showed efficient MIC against S. aureus, followed by Bacillus cereus. SuggestionsThe relation of P. equisetifome extracts to its antioxidant, and antibacterial efficiencies open a new avenue of their potential uses in the food and pharmaceutical industries.
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    Öğe
    Screening of High Temperature Tolerant Tomato Genotypes for Their Fruit Mineral Content
    (2018) Dere, Sultan; Daşgan, Hayriye Yıldız; Akhoundnejad, Yelderem; Kafkas, Nesibe Ebru
    Agriculture is at the forefront of the sectors that will be most affected by climate change. It is inevitablethat Turkey is exposed to the negative effects of climate change due to its geographical location. Thedevelopment of new high temperature tolerant varieties is seen as an important economic measure in theadaptation to climate change. In this study, heat temparature tolerant tomato genotypes were investigated fortheir fruit mineral content. For this purpose, twenty tolerant tomatoes from the gene pool of the ÇukurovaUniversity, Department of Horticulture the and two commerical cultivars were grown in the open field conditionsduring 2016 spring and summer periods in Adana, Turkey. Tomato fruits grown under control and hightemperature stresses conditions were analyzed for phosphorus, potassium, calcium, magnesium, iron,manganese, copper and zinc. According to heat stress effects on the tomato fruit mineral content, the macronutrientswere ordered P, K, Ca, Mg from the least affected to the most affected. Moreover, the micro-nutrientswere ordered Cu, Fe and Zn from the least affected to the most affected. In the present study heat tolerant tomatogenotypes showed better performance and their mineral content most cases were higher than mineral content ofthe control trade cultivars.
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    Öğe
    SÜS BİTKİSİ OLARAK ÇİLEK YETİŞTİRİCİLİĞİNDE SAKSI BOYUTLARININ ETKİSİ
    (2017) Köksal, Nezihe; Kafkas, Nesibe Ebru; Özkaya, Aslıhan; Yasemin, Sara
    Günümüzde insanlar, gündelik hayatlarını daha yaşanabilir kılmak için, evlerin içinde ve balkon, teras gibi açık mekânlarda saksı içerisinde bitki yetiştirmeye yönelmektedir. Özellikle alışılagelmiş süs bitkilerinden farklı bitki türlerinin değişik ve estetik şekillerde sunulması ilgiyi artırmaktadır. Çilek (Fragaria × ananassa L.) fonksiyonel ve estetik açıdan saksılı süs bitkisi olarak değerlendirilemeye aday bir bitkidir. Bu çalışmada 'Albion' ve 'Sweet Charlie' çilek çeşitlerine ait bitkiler, piyasada yaygın olarak bulunan, üç farklı boyuttaki dekoratif saksılar (S0, S1 ve S2) içinde yetiştirilmiştir. Çalışmada; yaprak sayısı, yaprakçık genişliği ve uzunluğu, yaprak sapı uzunluğu ve kalınlığı, kök uzunluğu, kök boğazı kalınlığı, sürgün ve tüm bitki kuru ağırlığı, sürgün/kök oranı bitkisel özellikleri incelenmiştir. Görsel kalite ve estetik özellikler olarak ise; taç genişliği, uzunluğu ve yüksekliği, taç projeksiyon alanı (PA-cm²), PA/PAsaksı oranı, taç projeksiyon hacmi (PV-cm³) ve PV/PVsaksı oranı ile genç ve olgun yaprakların renk parametreleri (L, a, b, C, H) incelenmiştir. Çilek bitkisinde yetiştirme saksısının boyutunun artması birçok büyüme, görsel kalite ve renk özellikleri üzerine olumlu etki yaratmıştır. Çalışmada saksılı çilek bitkisinde kalite ve estetik değeri gösteren en belirgin parametre ise PA/PAsaksı oranı olarak görülmüştür. Sonuç olarak, saksı içinde çilek yetiştiriciliği için orta boy (S1) saksının kullanılması uygun bulunmuştur