336 research outputs found

    Effects of bud loading levels and nitrogen doses on yield, physical and chemical properties of brined grapeleaves

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    The aim of this study was to investigate the effects of several bud loading levels in winter pruning and nitrogen doses on yield and physical and chemical properties of fresh vine-leaves of grape cultivar “Narince”. Vines trained with bilateral cordon system was pruned to yield 35000 to 53000 buds/ha (16 or 24 buds/vine) above second bud in 2005 to 2006 growing season. Four nitrogen doses (0, 70, 140, 210 kg N /ha) were applied, in a completely randomized block with four replications. Brined-grape leaves were collected four times during growing season. Total fresh leaf yield (g/vine; kg/ha), number of leaves in 100 g samples, leaf area for physical properties; dry matter, ash, pH and titratable acidity for chemical properties were determined. Bud loading levels and N applications had significant effect (P<0.05) on fresh leaf yield. Fresh leaf yield varied from 2233 to 2978 kg/ha in 2005 and 3356 to 4221 kg/ha in 2006, respectively. Mean leaf area decreased with increasing of N doses and bud loading levels. Number of leaves in 100 g samples ranged from 33.3 to 38.9. Pruning and nitrogen doses had no effect on percent dry matter and ash ratio. Bud loading increased with pruning and N applications resulted in higher leaf yield which had no effect on total soluble solid (TSS), dry matter, ash ratio and decreased total leaf area. The results indicate that 140 kg N/ha and 40000 to 45000 buds/ha loading levels as vine growth is recommended.Keywords: Brined-grape leaves, nitrogen, bud loading level, narince grape cultivar, Turkey

    Simultaneous multiplane imaging with reverberation multiphoton microscopy

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    Multiphoton microscopy (MPM) has gained enormous popularity over the years for its capacity to provide high resolution images from deep within scattering samples1. However, MPM is generally based on single-point laser-focus scanning, which is intrinsically slow. While imaging speeds as fast as video rate have become routine for 2D planar imaging, such speeds have so far been unattainable for 3D volumetric imaging without severely compromising microscope performance. We demonstrate here 3D volumetric (multiplane) imaging at the same speed as 2D planar (single plane) imaging, with minimal compromise in performance. Specifically, multiple planes are acquired by near-instantaneous axial scanning while maintaining 3D micron-scale resolution. Our technique, called reverberation MPM, is well adapted for large-scale imaging in scattering media with low repetition-rate lasers, and can be implemented with conventional MPM as a simple add-on.Accepted manuscrip

    Nonoscillatory Solutions of Higher-Order Fractional Differential Equations

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    This paper deals with the asymptotic behavior of the nonoscillatory solutions of a certain forced fractional differential equations with positive and negative terms, involving the Caputo fractional derivative. The results obtained are new and generalize some known results appearing in the literature. Two examples are also provided to illustrate the results

    CollecTF : a database of experimentally-validated transcription factor-binding sites in Bacteria

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    The influx of high-throughput data and the need for complex models to describe the interaction of prokaryotic transcription factors (TF) with their target sites pose new challenges for TF-binding site databases. CollecTF (http://collectf.umbc.edu) compiles data on experimentally validated, naturally occurring TF-binding sites across the Bacteria domain, placing a strong emphasis on the transparency of the curation process, the quality and availability of the stored data and fully customizable access to its records. CollecTF integrates multiple sources of data automatically and openly, allowing users to dynamically redefine binding motifs and their experimental support base. Data quality and currency are fostered in CollecTF by adopting a sustainable model that encourages direct author submissions in combination with in-house validation and curation of published literature. CollecTF entries are periodically submitted to NCBI for integration into RefSeq complete genome records as link-out features, maximizing the visibility of the data and enriching the annotation of RefSeq files with regulatory information. Seeking to facilitate comparative genomics and machine-learning analyses of regulatory interactions, in its initial release CollecTF provides domain-wide coverage of two TF families (LexA and Fur), as well as extensive representation for a clinically important bacterial family, the Vibrionaceae

    Turkey: Coronary and structural heart interventions from 2010 to 2015

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    Growing populations and ageing demographics lead to an increased burden of ischaemic heart disease and related cardiovascular interventions, resulting in pressure on healthcare sys-Tems. Although the healthcare system in Turkey has undergone comprehensive remodelling over the last decade, there are many challenges to overcome, including better reimbursement for car-diovascular interventions, standardisation of interventional cardiology services and research-related activities. In this manuscript, we present an overview of coronary and structural heart interventions in Turkey, as well as providing information on current reimbursement policies and the healthcare system. © Europa Digital and Publishing 2017. All Rights Reserved

    Tunable adsorption on carbon nanotubes

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    We investigated the adsorption of a single atom, hydrogen and aluminum, on single wall carbon nanotubes from first-principles. The adsorption is exothermic, and the associated binding energy varies inversely as the radius of the zigzag tube. We found that the adsorption of a single atom and related properties can be modified continuously and reversibly by the external radial deformation. The binding energy on the high curvature site of the deformed tube increases with increasing radial deformation. The effects of curvature and radial deformation depend on the chirality of the tube.Comment: To be appear in Physical Review Letter

    Improving the sensitivity of future GW observatories in the 1-10 Hz band: Newtonian and seismic noise

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    The next generation gravitational wave interferometric detectors will likely be underground detectors to extend the GW detection frequency band to frequencies below the Newtonian noise limit. Newtonian noise originates from the continuous motion of the Earth’s crust driven by human activity, tidal stresses and seismic motion, and from mass density fluctuations in the atmosphere. It is calculated that on Earth’s surface, on a typical day, it will exceed the expected GW signals at frequencies below 10 Hz. The noise will decrease underground by an unknown amount. It is important to investigate and to quantify this expected reduction and its effect on the sensitivity of future detectors, to plan for further improvement strategies. We report about some of these aspects. Analytical models can be used in the simplest scenarios to get a better qualitative and semi-quantitative understanding. As more complete modeling can be done numerically, we will discuss also some results obtained with a finite-element-based modeling tool. The method is verified by comparing its results with the results of analytic calculations for surface detectors. A key point about noise models is their initial parameters and conditions, which require detailed information about seismic motion in a real scenario. We will describe an effort to characterize the seismic activity at the Homestake mine which is currently in progress. This activity is specifically aimed to provide informations and to explore the site as a possible candidate for an underground observatory. Although the only compelling reason to put the interferometer underground is to reduce the Newtonian noise, we expect that the more stable underground environment will have a more general positive impact on the sensitivity.We will end this report with some considerations about seismic and suspension noise

    Pressure-Induced Interlinking of Carbon Nanotubes

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    We predict new forms of carbon consisting of one and two dimensional networks of interlinked single wall carbon nanotubes, some of which are energetically more stable than van der Waals packing of the nanotubes on a hexagonal lattice. These interlinked nanotubes are further transformed with higher applied external pressures to more dense and complicated stable structures, in which curvature-induced carbon sp3^{3} re-hybridizations are formed. We also discuss the energetics of the bond formation between nanotubes and the electronic properties of these predicted novel structures.Comment: 4 pages, 4 postscript figures; To be appear in PR

    The Bounds on the magnetic moment of the tau-neutrino via the process (e+e-)-->nunu(bar)gamma

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    Bounds on the anamolous magnetic moment of the tau neutrino are calculated through the reaction (e+e-)-->nunu(bar)gamma at the neutral boson pole and in the framework of an extended standard model, a left-right symmetric model and a superstring-inspired model which has one extra low-energy neutral gauge boson. The results are basedComment: 9 pages, 1 figure, 3 Table
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