Lysophosphatidylethanolamine (LPE) Improves Fruit Size, Color, Quality and Phytochemical Contents of Sweet Cherry c.v. '0900 Ziraat'

Ozgen, Mustafa,Serce, Sedat,Akca, Yasar,Hong, Ji Heun Korean Society of Horticultural Science 2015 원예과학기술지 Vol.33 No.2

Lysophosphatidylethanolamine (LPE) affects the quality of flowers, fruits, and other horticultural products. Studies have provided evidence that LPE can accelerate ripening of fruits and prolong shelf-life at the same time. In this study, the influence of LPE on anthocyanin accumulation and phytochemical characteristics of sweet cherry was investigated. LPE ($10mg{\cdot}L^{-1}$) was applied to a commercial sweet cherry c.v. '0900 Ziraat' orchard two and four weeks before harvest for two treatment years (2011 and 2012). Preharvest applications of LPE resulted in significant improvement in both pomological and phytochemical attributes at harvest. LPE treatment led to a 17% increase in fruit weight and a 6% increase in soluble solid content when averaged over two experimental years. Fruit phytochemical content and antioxidant capacity were increased significantly. The average total phenolic content of LPE-treated fruits for the two years was $703{\mu}g$ gallic acid equivalent (GAE)/g fresh weight (g FW) compared to $569{\mu}g$ GAE/g FW in the untreated control. Fruits treated with LPE had a 27% and 16% more anthocyanin than the control fruits in 2011 and 2012. Antioxidant capacity of fruits, as measured by TEAC (Trolox equivalent antioxidant capacity) assay, was 12.5 and $11.4{\mu}mol$ TE/g FW in LPE-treated and untreated control fruits, respectively, when averaged over two experimental years. Our results suggest that preharvest application of LPE may have the potential to increase anthocyanin accumulation, improve fruit quality and enhance phytochemical characteristics of sweet cherries.

Antioxidant Capacity and Chemical Properties of Selected Barberry (Berberis vulgaris L.) Fruits

Mustafa Ozgen,Onur Saracoglu,Esma Nur Gecer 한국원예학회 2012 Horticulture, Environment, and Biotechnology Vol.53 No.6

Six purple-black barberry accessions (Berberis vulgaris L.) were obtained from various sites in Sivas province of Turkey. Fruits were analyzed for their total phenolic (TP), total monomeric anthocyanin (TMA) contents and for their antioxidant capacity by the ferric reducing antioxidant power (FRAP) and TEAC assays. Sugar and organic acid composition were also determined by HPLC. TP and TMA contents were measured using the Folin-Ciocalteu reagent and pH differential methods, respectively. Variability between the accessions was not high. Variability among accessions was greatest for FRAP content (C.V. 17.9%); individuals ranged from 41.0 to 65.6 µmol TE・g-1on a fresh weight basis. Variation among the accessions was also evident for TP, TMA, and TEAC values (C.V. 16.21%, 14.85%, and 7.13%, respectively). The major sugars of barberry fruits were glucose (8.84 g・100 mL-1) and fructose (6.12 g・100 mL-1) and dominant organic acids were malic (7.59 g・100 mL-1) and citric (1.34 g・100 mL-1). Within this limited study of six different accessions, chemical profile and antioxidant capacity of barberry fruits have rich source of natural antioxidant substances.

Thermoelastic Transition Kinetics of a Gamma Irradiated CuZnAl Shape Memory Alloy

Soner Ozgen,Cengiz Tatar 대한금속·재료학회 2012 METALS AND MATERIALS International Vol.18 No.6

Many types of shape memory alloys have been used in nuclear reactors and aerospace applications where they are exposed to high levels of various kinds of radiation. The effect of gamma irradiation on the transformation kinetics of thermoelastic transformations in a shape memory CuZnAl alloy was investigated by differential scanning calorimetry (DSC) with heating/cooling rates of 10, 20, 30 and 40 °C/min. Irradiation doses of 10, 20, 30 and 40 kGy were applied to the samples of the alloy. Changes in Gibbs free energies,entropies and elastic energies were calculated. Reverse transition temperatures As and Af systematically decreased with increasing doses, although forward transition temperatures Ms and Mf underwent a minimum value at a dose of 20 kGy. Hysteresis in the transition temperatures changed as an inverse parabolic function of the irradiation dose. The activation energies of transformations were calculated by using Kissinger and Osawa methods.

The Tomato Debate: Postharvest-ripened or Vine Ripe Has More Antioxidant?

Senay Ozgen,Saziye Sekerci,Recep Korkut,Tugba Karabiyik 한국원예학회 2012 Horticulture, Environment, and Biotechnology Vol.53 No.4

The vast majority of the tomato crop is harvested at mature green stage and ripened off of the plant for fresh market consumption. The other large amount of crop is harvested when the fruit has reached to fully mature red stage which is called “vine-ripened”. Here we attempt to answer and clarify if there is any difference between the antioxidant capacity of postharvest ripened and vine ripe tomatoes. Greenhouse grown tomatoes (cv. Newton)were harvested at four different ripening stages of unripe and vine ripe. Total phenolic (TP) contents and antioxidant capacity by the FRAP (ferric reducing antioxidant power) and TEAC (trolox equivalent antioxidant capacity) assays were performed on all ripening stages. Results of the present study demonstrated that tomato peel has significantly higher TP content and antioxidant capacity than the pulp tissues in all maturity stages tested. TP and antioxidant capacity of tomato fruits were affected during postharvest ripening process. If only pulp tissue considered, TAC of vine-ripened and postharvest ripened pink tomatoes has similar amount, but significantly higher content than mature green, breaker and turning maturity stages. If peel tissue measured, the mean separations identified three groups. Postharvest ripened mature green stage has the most TAC, followed by vine-ripened and pink stage. Postharvest breaker and turning stages have the least amount of TAC.

Lysophosphatidylethanolamine (LPE) Improves Fruit Size, Color, Quality and Phytochemical Contents of Sweet Cherry c.v. ‘0900 Ziraat’

Mustafa Ozgen,Sedat Serce,Ya?ar Akca,Ji Heun Hong 한국원예학회 2015 원예과학기술지 Vol.33 No.2

Lysophosphatidylethanolamine (LPE) affects the quality of flowers, fruits, and other horticultural products. Studies have provided evidence that LPE can accelerate ripening of fruits and prolong shelf-life at the same time. In this study, the influence of LPE on anthocyanin accumulation and phytochemical characteristics of sweet cherry was investigated. LPE (10 ㎎·L<SUP>-1</SUP>) was applied to a commercial sweet cherry c.v. ‘0900 Ziraat’ orchard two and four weeks before harvest for two treatment years (2011 and 2012). Preharvest applications of LPE resulted in significant improvement in both pomological and phytochemical attributes at harvest. LPE treatment led to a 17% increase in fruit weight and a 6% increase in soluble solid content when averaged over two experimental years. Fruit phytochemical content and antioxidant capacity were increased significantly. The average total phenolic content of LPE-treated fruits for the two years was 703 ㎍ gallic acid equivalent (GAE)/g fresh weight (g FW) compared to 569 ㎍ GAE/g FW in the untreated control. Fruits treated with LPE had a 27% and 16% more anthocyanin than the control fruits in 2011 and 2012. Antioxidant capacity of fruits, as measured by TEAC (Trolox equivalent antioxidant capacity) assay, was 12.5 and 11.4 μ㏖ TE/g FW in LPE-treated and untreated control fruits, respectively, when averaged over two experimental years. Our results suggest that preharvest application of LPE may have the potential to increase anthocyanin accumulation, improve fruit quality and enhance phytochemical characteristics of sweet cherries.

Morphological Characterization of Several Morus Species from Turkey

Mustafa Ozgen,Mehmet Gune?,Ya?ar Akca,Nurgul Turemi?,Muruvvet Ilgin,Gokhan Kizilci,Ummugulsum Erdo?an,Sedat Serce 한국원예학회 2009 Horticulture, Environment, and Biotechnology Vol.50 No.1

Among edible mulberry (Morus spp.) species, M. alba, M. nigra, M. rubra, and M. laevigata grow in Turkey. Several regions of Turkey were surveyed during the 2007 and 2008 growing seasons. More than 200 promising mulberry accessions were visited and preliminary tree and fruit characteristics were investigated. Based on the first year results, a total of 22 superior accessions from four different species were morphologically characterized in the second year. Considerable variations were observed for most of the traits. For example, fruit weight ranged from 3.3 to 8.2 g for an average of 4.9 g. M. nigra accessions had much smaller mean values when compared to those of M. rubra and M. alba. The juice yield ranged from 56.1 to 67.8% for M. nigra accessions, 20.0 to 31.1% for M. rubra and 25.6 to 35.0% for M. alba. The mean total acidity of M. nigra was 2.7%, 3.1-fold higher than those of M. rubra and M. alba accessions. Soluble solids ranged from 14.1 to 27.1% for an average of 21.8%. These fruit traits were subjected to principle component analysis and the results indicated that M. nigra accessions were grouped together, while M. laevigata accession was distinct from other genotypes. The accessions of M. rubra and M. alba separated from M. nigra and M. laevigata accessions, although the two groups did not separate from each other.

Seismic performance evaluation and retrofitting with viscous fluid dampers of an existing bridge in Istanbul

Bayramoglu, Guliz,Ozgen, Alpay,Altinok, Enver Techno-Press 2014 Structural Engineering and Mechanics, An Int'l Jou Vol.49 No.4

In this paper, seismic performance of Kozyatagi Bridge is evaluated by employing nonlinear elasto-plastic dynamic analysis and the deformation-based performance. The time-history records of the 1999 Izmit, 1971 San Fernando and 1989 Loma Prieta earthquakes are modified by adopting a probability of exceedance of 2% in 50 years corresponding to the return period of 2475 years. The analysis is carried out for three different bearing cases which are movable bearings, restrained bearings, and movable bearings with viscous fluid dampers in the radial direction. The analysis results show that the bridge can be retrofitted with viscous fluid dampers. In this case the reinforced concrete piers need not be strengthened by any jacketing techniques in order to preserve the original architectural appearance of the bridge. The retrofitting design of the bridge with viscous fluid dampers is also presented in detail.

Quality and Nutritional Property Changes in Stored Dried Apricots Fumigated by Sulfur Dioxide

Fatih Sen,Mustafa Ozgen,Bayram Murat Asma,Uygun Aksoy 한국원예학회 2015 Horticulture, Environment, and Biotechnology Vol.56 No.2

Apricots are grown in many countries and are marketed as dried or fresh. Sulfur fumigation is preferred as a low-cost pre-treatment to maintain apricot color. This study aims to determine the effect of sulfur dioxide (SO2) concentration on quality and nutritional properties of dried apricot fruits during storage. Apricot fruits were treated with different concentrations of SO2 (1,250, 2,000, and 3,500 mg・kg-1) and then stored at 20°C under 50-65% relative humidity conditions for 18 months. Fruit SO2 concentration decreased rapidly during the initial stage and then decreased at a slower rate. Fruit color darkening became more pronounced after 12 months, especially in the fruit treated with 1,250 and 2,000 mg・kg-1 SO2. After 18 months of storage, total phenolic content (839-890 mg GAE 100 g-1dry weight), antioxidant activity (9.4-11.6 μmol TE g-1 dry weight), and β-carotene levels (42.7-47.6 mg・kg-1) of all treatments varied only slightly, despite lower values overall. Therefore, SO2 levels must be chosen based on the expected storage conditions and length of the storage period.

Incidental Hiatal Hernia Detected with Meckel's Scintigraphy

Aksoy, Tamer,Kiratli, Pinar Ozgen The Korea Society of Nuclear Medicine 2011 핵의학 분자영상 Vol.45 No.1

Seismic performance evaluation and retrofitting with viscous fluid dampers of an existing bridge in Istanbul

Guliz Bayramoglu,Alpay Ozgen,Enver Altınok 국제구조공학회 2014 Structural Engineering and Mechanics, An Int'l Jou Vol.49 No.4

In this paper, seismic performance of Kozyatagi Bridge is evaluated by employing nonlinear elasto-plastic dynamic analysis and the deformation-based performance. The time-history records of the 1999 Izmit, 1971 San Fernando and 1989 Loma Prieta earthquakes are modified by adopting a probability of exceedance of 2% in 50 years corresponding to the return period of 2475 years. The analysis is carried out for three different bearing cases which are movable bearings, restrained bearings, and movable bearings with viscous fluid dampers in the radial direction. The analysis results show that the bridge can be retrofitted with viscous fluid dampers. In this case the reinforced concrete piers need not be strengthened by any jacketing techniques in order to preserve the original architectural appearance of the bridge. The retrofitting design of the bridge with viscous fluid dampers is also presented in detail.