99 research outputs found

    Determination of Flower Characteristics of Some Kiwifruit Genotypes (Actinidia Spp.) Obtained with Breeding Program

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    All Actinidia species are dioecious, male and female flowers grow on separate kiwifruit plants. In breeding studies, it is generally desirable to obtain female individuals. However, male plants are also of great importance for pollination. Therefore, it is necessary to examine the flower characteristics of the genotypes obtained by breeding studies. This research was conducted in the kiwifruit breeding plot of Yalova Atatürk Horticultural Central Research Institute for two years. Genotypes obtained from cultivars belonging to Actinidia deliciosa and Actinidia chinensis were used in the research. At the time of flowering, phenological observations of male and female genotypes, which are prominent in the population, have been made and the developmental stages of the flowers have been determined. At least 10 flowers of each genotype were used to determine the morphological characteristics.Number of leaves, number of petals, number of male organs, number of filaments, number of female organs, number of female organs and number of stylus were examined in order to determine flower characteristics. When the data obtained as a result of two years are evaluated; significant differences have been obtained particularly in terms of flowering time, flowering period, the number of stylus, the filament size, the number of female organs and the number of male organs. Female cultivars/genotypes tend to flowering later than male cultivars/genotypes, and female cultivars/genotypes have shorter filament length than male cultivars/genotypes. It has also been clearly observed that ovaries are not functional in male types

    Signature of Serum miR-199a/b in Coronary Artery Bypass Graft Surgery

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    Objective: microRNAs (miRNAs) have important potential as biomarkers in the diagnosis and prognosis of ischemia/reperfusion (I/R) injury in coronary artery bypass grafting surgery (CABG). This study investigated the relationship between preoperative (preop) and postoperative (post-op) cardiac parameters and miRNA expressions in CABG. Methods: We analyzed a total of 94 individuals (CABG, n= 46 and healthy control, n=48). Quantitative real-time polymerase chain reaction (qRT) was performed to determine plasma miRNA expressions (miR-21, miR-181a, miR-199a, miR-199b, and miR-320a-5p) in triplicates: before surgery, 1 hour after surgery, and 24 hours after surgery. The target genes and pathways of miRNA were determined using bioinformatic analysis. The biomarker potentials of miRNAs were evaluated with receiver operating characteristic (ROC) curve analysis. Results: All miRNAs were significantly downregulated (p \u3c 0.05). Troponin I, LVEF, CPK, and CK-MB were found to be statistically significant for operation groups (p \u3c 0.05). miRNA expressions and cardiac markers were associated with troponin I and/or CK-MB. In ROC analyses, miR-199a was a good diagnostic marker. CREBRF and ZNF704 genes may be a target for these miRNAs. Conclusions: Downregulation of miR-199a has a regulatory role in ischemia/reperfusion. They may contribute to CABG pathology through these two genes involved in signaling cascades to turn on protein response and ion binding

    Evaluation of a large dish-type concentrator solar lighting system for underground car park

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    To utilize solar energy more efficiently and reduce lighting power consumption in underground public spaces such as car park, a large dish-type concentrator solar lighting system is put forward along with its evaluation, which is a unique design to apply a laminated layer of beam split thin film coating and thin film solar cells onto the dish reflector. The collected sunlight is split into two parts, one being reflected into a fibre optical bundle (FOB) and transmitted for daylighting while the rest being absorbed by solar cells for electricity generation as other way to replenish daylighting. A set of four solar lighting system using 3.28m diameter dish are designed to meet the lighting requirement in a 17712munderground car park. A mathematical model is adopted to calculate the output power and conversion efficiency of solar cells distributed on the parabolic dish surface. The indoor illuminance distribution is given by lighting simulation. The results indicate that the average daylight illuminance in the car park can vary between 62.7 lx and 284 lx on 25 February 2016, and between 62.7 lx and 353 lx on 17 August 2016 for two chosen days respectively. For the presented design, the electricity produced by solar cells is just enough to power light emitting diodes (LEDs) for lighting meeting a criterion at night. Considering about 19% conversion efficiency of solar cells and the efficacy of 129.5 lm/W of LEDs, the hybrid solar lighting system can have about 40% utilization ratio of solar energy, so it can be concluded that a sufficient lighting provision can be provided by the proposed large dish-type concentrator solar lighting system for applications in underground car park

    Does Deep Tectonic Tremor Occur in the Central‐Eastern Mediterranean Basin?

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    Tectonic tremor has been observed at the roots of many fault systems around the Pacific rim, including convergent and transform plate boundaries. The extent to which deep tremor signals are prevalent along fault systems elsewhere, including the Mediterranean basin, has not yet been documented in detail. A body of evidence suggests that tremor triggered during the surface waves of teleseismic events may commonly occur where ambient tremor during episodic tremor and slip episodes occur, suggesting triggered tremor provides a useful tool to identify regions with ambient tremor. We perform a systematic search of triggered tremor associated with large teleseismic events between 2010 and 2020 at four major fault systems within the central-eastern Mediterranean basin, namely the Hellenic and Calabrian subduction zones, and the North Anatolian and Kefalonia transform faults. In addition, we search for ambient tremor during a slow slip event in the eastern Sea of Marmara along a secondary branch of the North Anatolian Fault, and two slow slip events beneath western Peloponnese (Hellenic Subduction Zone). We find no unambiguous evidence for deep triggered tremor, nor ambient tremor. The absence of triggered tremor at the Hellenic and Calabrian subduction zones supports an interpretation of less favorable conditions for tremorgenesis in the presence of old and cold slabs. The absence of tremor along the transform faults may be due to an absence of the conditions commonly promoting tremorgenesis in such settings, including high-fluid pressures and low-differential stresses between the down-dip limit of the seismogenic layer and the continental Moho

    Beşinci sınıf matematik ders kitabındaki ve sosyal bilgiler ders kitabındaki toplumsal cinsiyet eşitliği ve toplumsal cinsiyet rollerinin incelenmesi.

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    The purpose of this study is to examine social gender equality and social gender roles in 5th grade mathematics and social sciences textbooks. Specifically what extend gender equality is included in 5th grade mathematics and social sciences textbooks, how gender roles is addressed in textbooks, how gender equality indicated are in the education programs in 5th grade textbooks and how these textbooks are differed in terms of showing gender equality were examined. The study was designed as a multiple case study in qualitative research with content analysis. The study was conducted with mathematics and social sciences textbooks used in the 2018-2019 academic years in Turkey. The results of the study reveal that mathematics textbook showed equality in numbers of illustrations and texts between different genders but this book had inequalities in terms of texts and illustrations showing gendered roles. This exemplified that gender stereotypes continue to be communicated to young learners through the use of illustrations and text which include traditional gender roles in mathematics textbook. On the other hand, social sciences textbook displayed inequalities in numbers of illustrations and texts between different genders and this book had gendered view in stereotypes. The social sciences textbook played roles in reproducing and in carrying gender stereotypes for learners. Additionally, social sciences textbook reflected Turkish society and culture as traditional.Thesis (M.S.) -- Graduate School of Social Sciences. Educational Administration and Planning Education

    Exergoeconomic analysis of a novel concentrated solar energy for lighting-power generation combined system based on spectral beam splitting

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    Lighting-power generation combined system (LIPGECOS) based on the approach of spectral beam splitting of concentrating solar radiation was introduced and performed exergoeconomic analysis by well-known the Specific Exergy Costing (SPECO) method. From the experimental data, the average energy and exergy efficiencies of the LIPGECOS were calculated as 0.15 and 0.09 respectively. The cost flows for concentrating dish, fibre optic bundle (FOB), cold mirror and Stirling engine were calculated as 0.016,0.016, 0.055, 0.040and0.040 and 0.018 in daily basis, respectively. The maximum exergetic cost coefficient belongs to the FOB component, while the minimum exergetic cost coefficient was calculated for the concentrating dish. Exergetic cost coefficients for the products of the dish, the mirror, the FOB and the Stirling engine are calculated as 1.07; 65.12; 199.47; 71.01 $/GJ, respectively. The maximum exergetic cost effectiveness (ECE) value is calculated for the dish as 0.1234; while the minimum one is for the mirror as 0.0000002. Copyright © 2016 Inderscience Enterprises Ltd

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    Special Issue on Exergetic Assessment of Energy Systems

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    WOS: 00037735320000
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