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    Comparison of Biochemical Parameters and Volatile Compounds of Some Hybrid Tomato Varieties
    (ANKARA UNIV, FAC AGR, 2017) Kara, Meryem; Sahin, Huseyin; Dinc, Saliha; Yildiz, Oktay; Can, Zehra; Er, Fatih
    Evaluating morphological and quality parameters such as shape, colour, size and yield are all common practices when assessing the quality of fruit and vegetables. In recent times, however, consumer interest in foods with high levels of bioactive components, high mineral content and acceptable flavor has increased considerably. In order to make a contribution to the production of fruit and vegetables with excellent morphological properties and high levels of bioactive compounds, two different hybrid tomato varieties (Ege F1 and Alida F1) cultivated in Turkey were compared in terms of their biochemical parameters (phenolic compounds, ascorbic acid, ss-carotene, lycopene, minerals) and volatiles. While the Alida F1 was rated the highest for lycopene and mineral values, the Ege F1 was outstanding in terms of phenolic compounds and volatiles. Ascorbic acid content of both cultivars ranged from 7.13 to 11.94 mg 100 g(-1) fw. The quantity in the Ege hybrid was remarkable. Chlorogenic acid, caffeic acid, p-coumaric acid, rutin and trans ferulic acid were the main phenolic compounds in both cultivars. Potassium (K) (4.09%) was the most predominant mineral in both hybrid tomatoes. Hexenal had the highest concentration value among tested volatiles followed by 2-hexenal, (6-methyl)-trans-5-Hepten-2-one. Comparison of biochemical parameters and volatiles of both varieties will give breeders an opportunity to choose the desired traits of tomatoes to cultivate for both taste and nutritional value.
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    Comparison of newly developed hydroxyl-functionalized monodisperse HILIC columns new HILIC column
    (TAYLOR & FRANCIS INC, 2017) Dinc, Saliha; Olmez, Saba Samatya; Tuncel, Ali
    In this study, new hydroxyl-functionalized monodisperse polymeric hydrophilic interaction chromatography (HILIC) columns were developed using different derivatization agents. In addition, the influences of derivatization temperature of the best agent and polymer composition on the separation were investigated under HILIC conditions. Monodisperse-porous hydrophilic particles were synthesized by the seeded polymerization method using 3-chloro-2-hydroxypropile methacrylate (HPMA-CL) and ethylene glycol dimethacrylate (EGDMA) monomers. The chloropropyl terminal ends of the poly(HPMA-Cl-co-EGDMA) particles were derivatized with amine group of ethanolamine (EA), diethanolamine, and triethanolamine (TEA) at 80 degrees C through nucleophilic reaction. The performance of synthesized particles was evaluated with the amount of ligand on the particle surfaces, column backpressure, and separation power under HILIC condition. TEA was found to be the best derivatization agent for the separation of toluene, acrylamide, thymine, adenine, and cytosine in respect to resolution factors (>1.5 for all analytes) and theoretical plate numbers (64.562N/m for acylamide). Upon determination of the best ligand, then the effect of different derivatization temperatures and polymer composition on TEA performance was investigated. Of all the tested polymer compositions, the chromatographic performance of TEA-M-80 (the derivatization of TEA at 80 degrees C together with M polymer composition) was found to be the best.
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    Production and some properties of traditional sugar beet pekmez from Turkey
    (INT SUGAR JOURNAL LTD, 2015) Yildiz, Oktay; Kara, Meryem; Dinc, Saliha
    Sugar beet pekmez is a traditional food in Turkey commonly produced in the sugar beet farming region. This traditional food was analyzed for its physicochemical properties, mineral content, antioxidant capacity, phenolic compounds and rheological properties. Total soluble content and HMF content of pekmez were 78.2 degrees Brix and 97.45 mg/kg, respectively. pH of sugar beet pekmez (4.65) was lower than Turkish Standard (5 <= 3H<6) but this value was in agreement with that of sour liquid pekmez.. Sugar beet pekmez's acidity and total protein content were 0.672 % and 1.80 % respectively. Sucrose content of pekmez at 29.3% was highest, followed by invert sugars (15.5%). Sodium and potassium were the main minerals. Antioxidant capacity of pekmez was remarkable. Total phenolic content, flavanoid content, FRAP value and DPPH activity of pekmez were 1.850 mg GAE/g, 0.013 mg QE/g, 11.245 mmol TE/g and 5.108 mg/mL, respectively. Eleven phenolic compounds were analyzed and six phenolic compounds, catechin, p-coumaric acid, cinnamic acid, rutin, protocatechuic acid and quercetin were quantified. p-coumaric acid (126.29 mg /kg), rutin (89.89 mg/kg), quercetin (75 mg/kg) and catechin (66.57 mg/kg) were found at high concentrations in the pekmez. As for rheological analysis, sugar beet pekmez exhibited pseudoplastic behavior. Sugar beet pekmez can be regarded as a new nutritive product for consumers and producers.
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    A simple and green extraction of carbon dots from sugar beet molasses: Biosensor applications
    (VERLAG DR ALBERT BARTENS, 2016) Dinc, Saliha
    Carbon dots emerged recently as a luminescent nanoparticles have received considerable attention. Carbon dots, which can be synthesized by different methods, have many application areas such as biosensor, bioimaging etc. In this study, carbon dots were extracted from a sugar beet molasses without using any other synthesis methods. Extracted carbon dots gave strong blue fluorescence under UV light. The characterization of carbon dots was performed using Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and atomic force microscopy (AFM). Optic properties were determined by UV-Vis and fluorescence spectroscopy. Carbon dots were used as tool of biosensor in detection of riboflavin and tetracycline analyses. In riboflavin detection, fluorescence resonance energy (FRET) from carbon dots transferred to riboflavin and linear correlation was obtained between FRET efficiency and riboflavin concentration (R-2 = 0.9904). Tetracycline decreased the fluorescence of carbon dots. There was a linear correlation between fluorescence decrease and tetracycline concentration (R-2 = 0.9952). Extracted carbon dots can successfully be used in the determination of riboflavin and tetracycline.
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    Sugar beet carbon dots: Detection of Fe3+ ions
    (ELSEVIER SCIENCE BV, 2016) Dinc, Saliha
    [Abstract not Available]
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    Utilization of zero-trans non-interesterified and interesterified shortenings in cookie production
    (SPRINGER INDIA, 2014) Dinc, Saliha; Javidipour, Issa; Ozbas, Ozen Ozboy; Tekin, Aziz
    The effects of zero-trans chemically interesterified (in-es) and non-interesterified (non-in-es) cottonseed (CO), hazelnut (HO) and olive oil (OO) and their blends (25, 50 and 75%) with palm oil (PO) were studied in the production of cookies. All the experimental shortenings had zero-trans fatty acids (TFA) while the shortening contained 14.20% TFA. Incorporation of CO in PO considerably increased the linoleic acid content whereas the raising of HO and OO ratio in the blend increased the oleic acid content. Zero-TFA and lower saturated /unsaturated fatty acid ratio (SFA/UFA) of some of the experimental shortenings indicated an important in nutritional properties of cookies produced from these experimental shortenings. Cookies with in-es shortenings showed significantly higher (p < 0.05) spread ratios and L Hunter color than their non-in-es shortenings added counterparts. It can be concluded that chemical interesterification is a promising method to produce cookie shortenings with zero-TFA.