205 results match your criteria Beton- Und Stahlbetonbau[Journal]


Atomic reconstruction in twisted bilayers of transition metal dichalcogenides.

Nat Nanotechnol 2020 May 25. Epub 2020 May 25.

Department of Physics and Astronomy, University of Manchester, Manchester, UK.

Van der Waals heterostructures form a unique class of layered artificial solids in which physical properties can be manipulated through controlled composition, order and relative rotation of adjacent atomic planes. Here we use atomic-resolution transmission electron microscopy to reveal the lattice reconstruction in twisted bilayers of the transition metal dichalcogenides, MoS and WS. For twisted 3R bilayers, a tessellated pattern of mirror-reflected triangular 3R domains emerges, separated by a network of partial dislocations for twist angles θ < 2°. Read More

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http://dx.doi.org/10.1038/s41565-020-0682-9DOI Listing

A new species of (Squamata, Gekkonidae) from Cambodia's Prey Lang Wildlife Sanctuary.

Zookeys 2020 13;926:133-158. Epub 2020 Apr 13.

North Carolina Museum of Natural Sciences, 11 West Jones Street, Raleigh, North Carolina 27601, USA North Carolina Museum of Natural Sciences Raleigh United States of America.

is described from Phnom Chi, an isolated mountain in Prey Lang Wildlife Sanctuary, Kampong Thom Province, Cambodia. The new species is recognized by having a unique combination of morphological characters, including snout-vent length 76.1-80. Read More

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http://dx.doi.org/10.3897/zookeys.926.48671DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7170969PMC

Expression of the type 1 lysophosphatidic acid receptor in osteoblastic cell lineage controls both bone mineralization and osteocyte specification.

Biochim Biophys Acta Mol Cell Biol Lipids 2020 Aug 21;1865(8):158715. Epub 2020 Apr 21.

Pathophysiology, Diagnosis and treatments of bone diseases, INSERM UMR1033, Lyon, France. Electronic address:

Lysphosphatidic acid (LPA) is a major natural bioactive lipid mediator whose biological functions affect multiple organs. These include bone as demonstrated by global Lpar1-knockout mice (Lpar1) which present a bone growth defect. LPA acts on all bone cells including osteoblasts, that are responsible for bone formation, and osteoclasts, which are specialized cells that resorb bone. Read More

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http://dx.doi.org/10.1016/j.bbalip.2020.158715DOI Listing

Triplet Excitation and Electroluminescence from a Supramolecular Monolayer Embedded in a Boron Nitride Tunnel Barrier.

Nano Lett 2020 Jan 13;20(1):278-283. Epub 2019 Dec 13.

Instituto de Energía Solar , Universidad Politécnica de Madrid , Avenida Complutense 30 , Madrid 28040 , Spain.

We show that ordered monolayers of organic molecules stabilized by hydrogen bonding on the surface of exfoliated few-layer hexagonal boron nitride (hBN) flakes may be incorporated into van der Waals heterostructures with integral few-layer graphene contacts forming a molecular/two-dimensional hybrid tunneling diode. Electrons can tunnel through the hBN/molecular barrier under an applied voltage , and we observe molecular electroluminescence from an excited singlet state with an emitted photon energy > , indicating upconversion by energies up to ∼1 eV. We show that tunneling electrons excite embedded molecules into singlet states in a two-step process via an intermediate triplet state through inelastic scattering and also observe direct emission from the triplet state. Read More

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http://dx.doi.org/10.1021/acs.nanolett.9b03787DOI Listing
January 2020
13.592 Impact Factor

Biodistribution and Biosafety of a Poly(Phosphorhydrazone) Dendrimer, an Anti-Inflammatory Drug-Candidate.

Biomolecules 2019 09 11;9(9). Epub 2019 Sep 11.

INSERM, U1043, CNRS, U5282, Université de Toulouse, UPS, Centre de Physiopathologie de Toulouse-Purpan, F-31300 Toulouse, France.

Dendrimers are nanosized, arborescent polymers of which size and structure are perfectly controlled. This is one reason why they are widely used for biomedical purposes. Previously, we showed that a phosphorus-based dendrimer capped with anionic azabisphosphonate groups (so-called ABP dendrimer) has immuno-modulatory and anti-inflammatory properties towards human immune cells in vitro. Read More

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http://dx.doi.org/10.3390/biom9090475DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6770054PMC
September 2019

AIRBED: A Simplified Density Functional Theory Model for Physisorption on Surfaces.

J Chem Theory Comput 2019 Oct 10;15(10):5628-5634. Epub 2019 Sep 10.

School of Physics & Astronomy , University of Nottingham , University Park , Nottingham NG7 2RD , United Kingdom.

Dispersion interactions are commonly included in density functional theory (DFT) calculations through the addition of an empirical correction. In this study, a modification is made to the damping function in DFT-D2 calculations to describe repulsion at small internuclear distances. The resulting Atomic Interactions Represented By Empirical Dispersion (AIRBED) approach is used to model the physisorption of molecules on surfaces such as graphene and hexagonal boron nitride, where the constituent atoms of the surface are no longer required to be included explicitly in the density functional theory calculation but are represented by a point charge to capture electrostatic effects. Read More

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http://dx.doi.org/10.1021/acs.jctc.9b00576DOI Listing
October 2019

Endonasal Endoscopic Management of Pterigopalatine Fossa Hydatid Cyst.

J Craniofac Surg 2019 Nov-Dec;30(8):e757-e760

Ear Nose and Throat Department, Ankara University Medical School, Sihhiye, Turkey.

Hydatid cyst (echinococcosis) is an infectious disease caused mainly by Echinococcus granulosus, a parasite transmitted by dogs and encountered first in the liver and then in the lungs. Involvement in the head and neck region is uncommon, and pterygopalatine fossa disease resulting from hydatid cyst is extremely rare, with only 4 reported patients. In this report, the authors present a patient with exophthalmus caused by a primary hydatid cyst and involving the pterygopalatine fossa which treated only with endoscopic endonasal approach. Read More

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http://Insights.ovid.com/crossref?an=00001665-900000000-9450
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http://dx.doi.org/10.1097/SCS.0000000000005758DOI Listing
January 2020
2 Reads

Epitaxial multilayers of alkanes on two-dimensional black phosphorus as passivating and electrically insulating nanostructures.

Nanoscale 2019 Oct 18;11(37):17252-17261. Epub 2019 Jul 18.

Istituto per lo Studio dei Materiali Nanostrutturati (ISMN) - Consiglio Nazionale delle Ricerche (CNR), Via P. Gobetti 101, 40129 Bologna, Italy.

Mechanically exfoliated two-dimensional (2D) black phosphorus (bP) is epitaxially terminated by monolayers and multilayers of tetracosane, a linear alkane, to form a weakly interacting van der Waals heterostructure. Atomic force microscopy (AFM) and computational modelling show that epitaxial domains of alkane chains are ordered in parallel lamellae along the principal crystalline axis of bP, and this order is extended over a few layers above the interface. Epitaxial alkane multilayers delay the oxidation of 2D bP in air by 18 hours, in comparison to 1 hour for bare 2D bP, and act as an electrical insulator, as demonstrated using electrostatic force microscopy. Read More

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http://dx.doi.org/10.1039/c9nr01155bDOI Listing
October 2019

Ordering, flexibility and frustration in arrays of porphyrin nanorings.

Nat Commun 2019 Jul 3;10(1):2932. Epub 2019 Jul 3.

School of Physics and Astronomy, University of Nottingham, Nottingham, NG7 2RD, UK.

The regular packing of atoms, molecules and nanoparticles provides the basis for the understanding of structural order within condensed phases of matter. Typically the constituent particles are considered to be rigid with a fixed shape. Here we show, through a combined experimental and numerical study of the adsorption of cyclic porphyrin polymers, nanorings, on a graphite surface, that flexible molecules can exhibit a rich and complex packing behaviour. Read More

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http://dx.doi.org/10.1038/s41467-019-11009-yDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6610075PMC

Direct band-gap crossover in epitaxial monolayer boron nitride.

Nat Commun 2019 06 14;10(1):2639. Epub 2019 Jun 14.

Laboratoire Charles Coulomb, UMR5221 CNRS-Université de Montpellier, 34095, Montpellier, France.

Hexagonal boron nitride is a large band-gap insulating material which complements the electronic and optical properties of graphene and the transition metal dichalcogenides. However, the intrinsic optical properties of monolayer boron nitride remain largely unexplored. In particular, the theoretically expected crossover to a direct-gap in the limit of the single monolayer is presently not confirmed experimentally. Read More

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http://dx.doi.org/10.1038/s41467-019-10610-5DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6572751PMC
June 2019
13 Reads

Ultra-high resolution imaging of thin films and single strands of polythiophene using atomic force microscopy.

Nat Commun 2019 04 4;10(1):1537. Epub 2019 Apr 4.

School of Physics and Astronomy, University of Nottingham, Nottingham, NG7 2RD, UK.

Real-space images of polymers with sub-molecular resolution could provide valuable insights into the relationship between morphology and functionality of polymer optoelectronic devices, but their acquisition is problematic due to perceived limitations in atomic force microscopy (AFM). We show that individual thiophene units and the lattice of semicrystalline spin-coated films of polythiophenes (PTs) may be resolved using AFM under ambient conditions through the low-amplitude (≤ 1 nm) excitation of higher eigenmodes of a cantilever. PT strands are adsorbed on hexagonal boron nitride near-parallel to the surface in islands with lateral dimensions ~10 nm. Read More

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http://dx.doi.org/10.1038/s41467-019-09571-6DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6449331PMC
April 2019
4 Reads

Numerical Simulation of Dynamic Mechanical Properties of Concrete under Uniaxial Compression.

Materials (Basel) 2019 Feb 20;12(4). Epub 2019 Feb 20.

College of Water Resources and Civil Engineering, China Agricultural University, Beijing, 100083, China.

Based on the base force element method (BFEM), the dynamic mechanical behavior of concrete under uniaxial compression loading at different strain rates is investigated. The concrete can be considered as a three-phase composite material composed of aggregate, cement mortar, and interfacial transition zone (ITZ) on the meso-level. A two-dimensional random aggregate model is generated by the Monte Carlo method. Read More

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http://dx.doi.org/10.3390/ma12040643DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6416626PMC
February 2019
3 Reads

Endoscopic Endonasal Approaches to Craniovertebral Junction Pathologies: A Single-Center Experience.

Turk Neurosurg 2018 Aug 27. Epub 2018 Aug 27.

Ankara University School of Medicine, Ibni Sina Hospital.

Aim: The craniovertebral junction is a remarkable anatomical area with unique anatomical and functional relationships, which present difficult challenges for surgeons. The traditional approach to addressing pathologies in this area is microscopic transoral resection with posterior fixation; however, endoscopic endonasal clivus and odontoid surgeries now currently gaining interest as alternative approaches. We reviewed our experience of using the endoscopic endonasal approach at our institution. Read More

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http://dx.doi.org/10.5137/1019-5149.JTN.23781-18.2DOI Listing
August 2018
11 Reads

Preference and Perception of Enhanced Images During Endonasal Endoscopic Surgery.

J Craniofac Surg 2018 Nov;29(8):2296-2298

Department of Otorhinolaryngology, Ankara University Medical School, Ankara, Turkey.

Image enhancement is used widely in endoscopic sinonasal surgery. It is yet to be established whether image enhancement has advantages over white-light endoscopy. The authors aimed to evaluate the preferences and subjective visual perception of image enhancement in diagnostic images acquired at the beginning of endonasal endoscopic surgeries. Read More

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http://dx.doi.org/10.1097/SCS.0000000000004801DOI Listing
November 2018
12 Reads

The growth and fluorescence of phthalocyanine monolayers, thin films and multilayers on hexagonal boron nitride.

Chem Commun (Camb) 2018 Oct;54(85):12021-12024

School of Physics & Astronomy, University of Nottingham, Nottingham NG7 2RD, UK.

Free-base phthalocyanine forms distinct interfacial phases and thin films on hexagonal boron nitride including a monolayer arrangement as determined using high resolution atomic force microscopy. The phases reveal significant differences in photoluminescence with an intense peak for monolayer coverages of flat-lying molecules which is red-shifted in agreement with theoretical models. Read More

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http://dx.doi.org/10.1039/c8cc06304dDOI Listing
October 2018
2 Reads

Inbreeding shapes tuberculosis progression in female adult badgers (Meles meles).

J Anim Ecol 2018 11;87(6):1497-1499

SaBio Research Group, Instituto de Investigación en Recursos Cinegéticos IREC (CSIC-UCLM-JCCM), Ciudad Real, Spain.

In Focus: Beton, C. H., Delahay, R. Read More

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http://dx.doi.org/10.1111/1365-2656.12901DOI Listing
November 2018
1 Read

Substrate-induced shifts and screening in the fluorescence spectra of supramolecular adsorbed organic monolayers.

J Chem Phys 2018 Aug;149(5):054701

School of Physics and Astronomy, University of Nottingham, Nottingham NG7 2RD, United Kingdom.

We have investigated the influence of the substrate on the fluorescence of adsorbed organic molecules. Monolayer films of perylene-3,4,9,10-tetracarboxylic-3,4,9,10-diimide (PTCDI), a supramolecular network formed from PTCDI and melamine, and perylene-3,4,9,10-tetracarboxylic-3,4,9,10-dianhydride have been deposited on hexagonal boron nitride (hBN). The principal peaks in the fluorescence spectra of these films were red-shifted by up to 0. Read More

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http://aip.scitation.org/doi/10.1063/1.5041418
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http://dx.doi.org/10.1063/1.5041418DOI Listing
August 2018
13 Reads

Supramolecular Assemblies on Surfaces: Nanopatterning, Functionality, and Reactivity.

ACS Nano 2018 Aug 16;12(8):7445-7481. Epub 2018 Jul 16.

California NanoSystems Institute , University of California, Los Angeles , Los Angeles , California 90095 , United States.

Understanding how molecules interact to form large-scale hierarchical structures on surfaces holds promise for building designer nanoscale constructs with defined chemical and physical properties. Here, we describe early advances in this field and highlight upcoming opportunities and challenges. Both direct intermolecular interactions and those that are mediated by coordinated metal centers or substrates are discussed. Read More

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http://dx.doi.org/10.1021/acsnano.8b03513DOI Listing
August 2018
17 Reads

High-Temperature Molecular Beam Epitaxy of Hexagonal Boron Nitride with High Active Nitrogen Fluxes.

Materials (Basel) 2018 Jun 30;11(7). Epub 2018 Jun 30.

School of Physics and Astronomy, University of Nottingham, Nottingham NG7 2RD, UK.

Hexagonal boron nitride (hBN) has attracted a great deal of attention as a key component in van der Waals (vdW) heterostructures, and as a wide band gap material for deep-ultraviolet devices. We have recently demonstrated plasma-assisted molecular beam epitaxy (PA-MBE) of hBN layers on substrates of highly oriented pyrolytic graphite at high substrate temperatures of ~1400 °C. The current paper will present data on the high-temperature PA-MBE growth of hBN layers using a high-efficiency radio-frequency (RF) nitrogen plasma source. Read More

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http://dx.doi.org/10.3390/ma11071119DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6073546PMC
June 2018
2 Reads

Moiré-Modulated Conductance of Hexagonal Boron Nitride Tunnel Barriers.

Nano Lett 2018 07 27;18(7):4241-4246. Epub 2018 Jun 27.

School of Physics and Astronomy , University of Nottingham , Nottingham , NG7 2RD , United Kingdom.

Monolayer hexagonal boron nitride (hBN) tunnel barriers investigated using conductive atomic force microscopy reveal moiré patterns in the spatial maps of their tunnel conductance consistent with the formation of a moiré superlattice between the hBN and an underlying highly ordered pyrolytic graphite (HOPG) substrate. This variation is attributed to a periodc modulation of the local density of states and occurs for both exfoliated hBN barriers and epitaxially grown layers. The epitaxial barriers also exhibit enhanced conductance at localized subnanometer regions which are attributed to exposure of the substrate to a nitrogen plasma source during the high temperature growth process. Read More

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http://dx.doi.org/10.1021/acs.nanolett.8b01223DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6095635PMC
July 2018
7 Reads

MicroRNA-221/222 expression in atherosclerotic coronary artery plaque versus internal mammarian artery and in peripheral blood samples.

Biomarkers 2018 Nov 26;23(7):670-675. Epub 2018 Jun 26.

d Department of Cardiology, Faculty of Medicine , Cumhuriyet University , Sivas , Turkey.

Background: Atherosclerosis is a disease of the arterial wall with predilection to some sites on others. MicroRNAs (miRNAs) are a class of the non-coding RNAs regulating the target gene expression at post-transcriptional level. Different miRNAs were found at distinct stages of plaque development and expression of miRNAs' might play an important role in the local behaviour of atherosclerotic plaques. Read More

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http://dx.doi.org/10.1080/1354750X.2018.1474260DOI Listing
November 2018
19 Reads

Endospanin-2 enhances skeletal muscle energy metabolism and running endurance capacity.

JCI Insight 2018 05 3;3(9). Epub 2018 May 3.

Université de Lille, U1011 - EGID, F-59000 Lille, France.

Metabolic stresses such as dietary energy restriction or physical activity exert beneficial metabolic effects. In the liver, endospanin-1 and endospanin-2 cooperatively modulate calorie restriction-mediated (CR-mediated) liver adaptations by controlling growth hormone sensitivity. Since we found CR to induce endospanin protein expression in skeletal muscle, we investigated their role in this tissue. Read More

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http://dx.doi.org/10.1172/jci.insight.98081DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6012521PMC
May 2018
39 Reads

Noonan syndrome-causing SHP2 mutants impair ERK-dependent chondrocyte differentiation during endochondral bone growth.

Hum Mol Genet 2018 07;27(13):2276-2289

INSERM UMR 1043, Centre of Pathophysiology of Toulouse Purpan (CPTP), University of Toulouse Paul Sabatier, Toulouse, France.

Growth retardation is a constant feature of Noonan syndrome (NS) but its physiopathology remains poorly understood. We previously reported that hyperactive NS-causing SHP2 mutants impair the systemic production of insulin-like growth factor 1 (IGF1) through hyperactivation of the RAS/extracellular signal-regulated kinases (ERK) signalling pathway. Besides endocrine defects, a direct effect of these mutants on growth plate has not been explored, although recent studies have revealed an important physiological role for SHP2 in endochondral bone growth. Read More

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https://academic.oup.com/hmg/article/27/13/2276/4969378
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http://dx.doi.org/10.1093/hmg/ddy133DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6005060PMC
July 2018
15 Reads

The partial dissociation of MHC class I-bound peptides exposes their N terminus to trimming by endoplasmic reticulum aminopeptidase 1.

J Biol Chem 2018 05 29;293(20):7538-7548. Epub 2018 Mar 29.

Institute for Life Sciences, University of Southampton, Southampton SO17 1BJ, United Kingdom, and

Endoplasmic reticulum aminopeptidase 1 (ERAP1) and ERAP2 process N-terminally extended antigenic precursors for optimal loading onto major histocompatibility complex class I (MHC I) molecules. We and others have demonstrated that ERAP1 processes peptides bound to MHC I, but the underlying mechanism is unknown. To this end, we utilized single-chain trimers (SCT) of the ovalbumin-derived epitope SIINFEKL (SL8) tethered to the H2-K MHC I determinant from mouse and introduced three substitutions, E63A, K66A, and W167A, at the A-pocket of the peptide-binding groove in the MHC I heavy chain, which interact with the N termini of peptides. Read More

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http://dx.doi.org/10.1074/jbc.RA117.000313DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5961055PMC
May 2018
6 Reads

Lattice-Matched Epitaxial Graphene Grown on Boron Nitride.

Nano Lett 2018 01 12;18(1):498-504. Epub 2017 Dec 12.

School of Physics and Astronomy, University of Nottingham , Nottingham NG7 2RD, United Kingdom.

Lattice-matched graphene on hexagonal boron nitride is expected to lead to the formation of a band gap but requires the formation of highly strained material and has not hitherto been realized. We demonstrate that aligned, lattice-matched graphene can be grown by molecular beam epitaxy using substrate temperatures in the range 1600-1710 °C and coexists with a topologically modified moiré pattern with regions of strained graphene which have giant moiré periods up to ∼80 nm. Raman spectra reveal narrow red-shifted peaks due to isotropic strain, while the giant moiré patterns result in complex splitting of Raman peaks due to strain variations across the moiré unit cell. Read More

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http://pubs.acs.org/doi/10.1021/acs.nanolett.7b04453
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http://dx.doi.org/10.1021/acs.nanolett.7b04453DOI Listing
January 2018
20 Reads

Effects of and - polymorphisms on coronary artery disease risk and patient survival in a Turkish population.

Biomed Rep 2017 Dec 3;7(6):547-552. Epub 2017 Oct 3.

Department of Statistics, Faculty of Science, Cumhuriyet University, 58140 Sivas, Turkey.

Myeloperoxidase (MPO) is an oxidative hemoprotein compound expressed in polymorphonuclear leukocytes that contributes to inflammatory responses. Coronary artery disease (CAD), as the most prevalent form of heart disease, is considered to originate from an interaction between genetic and environmental factors. In the present study, the potential associations between and - polymorphisms with CAD were investigated in a Turkish population using a polymerase chain reaction-based restriction fragment length polymorphism (RFLP) assay technique. Read More

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http://dx.doi.org/10.3892/br.2017.995DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5702965PMC
December 2017
23 Reads

Supramolecular heterostructures formed by sequential epitaxial deposition of two-dimensional hydrogen-bonded arrays.

Nat Chem 2017 12 24;9(12):1191-1197. Epub 2017 Jul 24.

School of Physics & Astronomy, University of Nottingham, Nottingham NG7 2RD, UK.

Two-dimensional (2D) supramolecular arrays provide a route to the spatial control of the chemical functionality of a surface, but their deposition is in almost all cases limited to a monolayer termination. Here we investigated the sequential deposition of one 2D array on another to form a supramolecular heterostructure and realize the growth-normal to the underlying substrate-of distinct ordered layers, each of which is stabilized by in-plane hydrogen bonding. For heterostructures formed by depositing terephthalic acid or trimesic acid on cyanuric acid/melamine, we have determined, using atomic force microscopy under ambient conditions, a clear epitaxial arrangement despite the intrinsically distinct symmetries and/or lattice constants of each layer. Read More

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http://dx.doi.org/10.1038/nchem.2824DOI Listing
December 2017
15 Reads

Cartilage reinforcement graft versus fascia graft in tympanoplasty

Turk J Med Sci 2017 08 23;47(4):1124-1127. Epub 2017 Aug 23.

Background/aim: The purpose of this study was to compare cartilage reinforcement graft results with temporalis fascia graft alone in terms of hearing and anatomical outcomes in tympanoplasty. Materials and methods: Patients who underwent tympanoplasty with/without ossiculoplasty and/or mastoidectomy at a university hospital from 2006 through 2013 were reviewed retrospectively. The patients were divided into those grafted with temporalis muscle fascia alone and with fascia reinforced with cartilage. Read More

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http://online.journals.tubitak.gov.tr/openDoiPdf.htm?mKodu=s
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http://dx.doi.org/10.3906/sag-1602-151DOI Listing
August 2017
23 Reads

Supramolecular networks stabilise and functionalise black phosphorus.

Nat Commun 2017 11 9;8(1):1385. Epub 2017 Nov 9.

School of Physics & Astronomy, University of Nottingham, Nottingham, NG7 2RD, UK.

The limited stability of the surface of black phosphorus (BP) under atmospheric conditions is a significant constraint on the exploitation of this layered material and its few layer analogue, phosphorene, as an optoelectronic material. Here we show that supramolecular networks stabilised by hydrogen bonding can be formed on BP, and that these monolayer-thick films can passivate the BP surface and inhibit oxidation under ambient conditions. The supramolecular layers are formed by solution deposition and we use atomic force microscopy to obtain images of the BP surface and hexagonal supramolecular networks of trimesic acid and melamine cyanurate (CA. Read More

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http://dx.doi.org/10.1038/s41467-017-01797-6DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5680224PMC
November 2017
29 Reads

Giant Quantum Hall Plateau in Graphene Coupled to an InSe van der Waals Crystal.

Phys Rev Lett 2017 Oct 10;119(15):157701. Epub 2017 Oct 10.

School of Physics and Astronomy, The University of Nottingham, Nottingham NG7 2RD, United Kingdom.

We report on a "giant" quantum Hall effect plateau in a graphene-based field-effect transistor where graphene is capped by a layer of the van der Waals crystal InSe. The giant quantum Hall effect plateau arises from the close alignment of the conduction band edge of InSe with the Dirac point of graphene. This feature enables the magnetic-field- and electric-field-effect-induced transfer of charge carriers between InSe and the degenerate Landau level states of the adjacent graphene layer, which is coupled by a van der Waals heterointerface to the InSe. Read More

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https://link.aps.org/doi/10.1103/PhysRevLett.119.157701
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http://dx.doi.org/10.1103/PhysRevLett.119.157701DOI Listing
October 2017
20 Reads

Exploring Step-by-Step Assembly of Nanoparticle:Cytochrome Biohybrid Photoanodes.

ChemElectroChem 2017 Aug 15;4(8):1959-1968. Epub 2017 May 15.

School of Biomedical Sciences, and The Astbury Centre for Structural Molecular BiologyUniversity of LeedsLeedsLS2 9JTU.K.

Coupling light-harvesting semiconducting nanoparticles (NPs) with redox enzymes has been shown to create artificial photosynthetic systems that hold promise for the synthesis of solar fuels. High quantum yields require efficient electron transfer from the nanoparticle to the redox protein, a property that can be difficult to control. Here, we have compared binding and electron transfer between dye-sensitized TiO nanocrystals or CdS quantum dots and two decaheme cytochromes on photoanodes. Read More

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http://dx.doi.org/10.1002/celc.201700030DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5573906PMC
August 2017
131 Reads

An atomic carbon source for high temperature molecular beam epitaxy of graphene.

Sci Rep 2017 07 26;7(1):6598. Epub 2017 Jul 26.

School of Physics & Astronomy, University of Nottingham, Nottingham, NG7 2RD, UK.

We report the use of a novel atomic carbon source for the molecular beam epitaxy (MBE) of graphene layers on hBN flakes and on sapphire wafers at substrate growth temperatures of ~1400 °C. The source produces a flux of predominantly atomic carbon, which diffuses through the walls of a Joule-heated tantalum tube filled with graphite powder. We demonstrate deposition of carbon on sapphire with carbon deposition rates up to 12 nm/h. Read More

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http://dx.doi.org/10.1038/s41598-017-07021-1DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5529545PMC
July 2017
10 Reads

Demonstration of Ischemia in Myocardial Perfusion Scintigraphy before Coronary Revascularization Decreases Acute Coronary Syndrome-related Hospitalizations.

World J Nucl Med 2017 Jul-Sep;16(3):212-217

Department of Cardiology, Cumhuriyet University Medical School, Sivas, Turkey.

In this study, we compared the patients who underwent coronary angiography (CAG), followed by revascularization by coronary artery stent implantation according to the CAG results without any evidence of ischemia with myocardial perfusion scintigraphy (MPS), and the patients who underwent revascularization by coronary artery stent implantation following the detection of ischemia in MPS before CAG in terms of the mortality and hospitalization due to acute coronary syndrome (ACS). Between January 2009 and January 2016, a total of 407 patients (52% males, 48% females; mean age: 66 ± 9 years; range: 40-85 years) who underwent CAG following diagnosis of stable angina and underwent coronary artery stenting were retrospectively analyzed. The patients were divided into two groups: Group 1 ( = 200) included those who had MPS before CAG and in whom ischemia was detected and stent was implanted, and Group 2 ( = 207) included those who had stent implantation according to the CAG results without prior MPS. Read More

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http://dx.doi.org/10.4103/1450-1147.207279DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5460305PMC
July 2017
61 Reads

Mean Platelet Volume as a Predictor of Heart Failure-Related Hospitalizations in Stable Heart Failure Outpatients with Sinus Rhythm.

Acta Cardiol Sin 2017 May;33(3):292-300

Departments of Cardiology, Cumhuriyet University Medical School, Sivas, Turkey.

Background: In this study, we investigated the relationship between the mean platelet volume (MPV) with mortality and heart failure (HF)-related hospitalization in stable chronic HF outpatients with reduced ejection fraction (HFrEF) and with sinus rhythm (SR).

Methods: This retrospective cohort study included 197 consecutive stable chronic HFrEF outpatients with SR, who were admitted to our cardiology outpatient clinics for examination between January 2014 and January 2015. According to the receiver-operating characteristic curve analysis, the optimal cut-off value of MPV to predict HF-related hospitalization was > 9. Read More

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5445247PMC
http://dx.doi.org/10.6515/acs20160930aDOI Listing
May 2017
24 Reads

Real-world stroke prevention strategies in nonvalvular atrial fibrillation in patients with renal impairment.

Eur J Clin Invest 2017 Jun 16;47(6):428-438. Epub 2017 May 16.

Department of Cardiology, Faculty of Medicine, Mugla Sitki Kocman University, Muğla, Turkey.

Background: The data regarding stroke prevention strategies in nonvalvular atrial fibrillation (NVAF) are limited especially in patients with renal impairment (RI). We sought to evaluate management dilemmas in patients with concurrent NVAF and RI in RAMSES (ReAl-life Multicenter Survey Evaluating Stroke Prevention Strategies inTurkey) study.

Methods: We conducted a prospective, multicenter, nation-wide registry in NVAF patients in outpatient cardiology clinics. Read More

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http://dx.doi.org/10.1111/eci.12758DOI Listing
June 2017
124 Reads

Drug Adherence in Patients With Nonvalvular Atrial Fibrillation Taking Non-Vitamin K Antagonist Oral Anticoagulants in Turkey: NOAC-TR.

Clin Appl Thromb Hemost 2018 Apr 19;24(3):525-531. Epub 2017 Feb 19.

19 Department of Cardiology, Ege University, Izmir, Turkey.

Adherence to non-vitamin K antagonist oral anticoagulants (NOACs) is an important factor for ensuring efficacy and safety in nonvalvular atrial fibrillation (NVAF). There are controversial results regarding NOAC adherence in real-world data and there are no data about NOAC adherence in Turkish population. This study investigated the NOAC adherence based on self-report, factors affecting nonadherence, and the relation of the adherence level with efficacy and safety outcomes. Read More

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http://dx.doi.org/10.1177/1076029617693940DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6714660PMC
April 2018
83 Reads

Cancer Antigen 125 is Associated with Length of Stay in Patients with Acute Heart Failure.

Tex Heart Inst J 2017 Feb 1;44(1):22-28. Epub 2017 Feb 1.

Length of stay is the primary driver of heart-failure hospitalization costs. Because cancer antigen 125 has been associated with poor morbidity and mortality rates in heart failure, we investigated the relationship between admission cancer antigen 125 levels and lengths of stay in heart-failure patients. A total of 267 consecutive patients (184 men, 83 women) with acute decompensated heart failure were evaluated prospectively. Read More

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http://dx.doi.org/10.14503/THIJ-15-5626DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5317355PMC
February 2017
7 Reads

Guideline-adherent therapy for stroke prevention in atrial fibrillation in different health care settings: Results from RAMSES study.

Eur J Intern Med 2017 May 24;40:50-55. Epub 2017 Feb 24.

Kartal Kosuyolu Heart Education and Research Hospital, Turkey.

Objective: No studies have been conducted in Turkey to compare the quality of stroke prevention therapies provided in different healthcare settings in patients with atrial fibrillation (AF). Therefore, we aimed to evaluate possible differences between secondary (SH) and tertiary hospital (TH) settings in the effectiveness of implementing AF treatment strategies.

Methods: Baseline characteristics of 6273 patients with non-valvular AF enrolled in the RAMSES (ReAl-life Multicentre Survey Evaluating Stroke Prevention Strategies in Turkey) study were compared. Read More

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http://dx.doi.org/10.1016/j.ejim.2017.02.011DOI Listing
May 2017
114 Reads

Flow and Diameter Changes of Forearm Arteries During Temporary Unilateral Reciprocal Occlusion: A Prospective Observational Study.

J Clin Ultrasound 2017 May 6;45(4):197-203. Epub 2017 Feb 6.

Department of Cardiology, Heart Center, Cumhuriyet University, Sivas, Turkey.

Purpose: Transradial and transulnar artery approaches are commonly used for percutaneous interventions, with considerably low risk of developing hand ischemia, for reasons that have not been fully understood. The aim of this study was to evaluate the changes in the diameter, peak systolic flow velocity (PSV), and volume flow (VF) of the radial (RA) and ulnar artery (UA) during unilateral reciprocal temporary occlusion.

Methods: A total of 204 extremity arteries of 102 consecutive patients were evaluated using Doppler ultrasonography. Read More

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http://dx.doi.org/10.1002/jcu.22440DOI Listing
May 2017
7 Reads

Gender-related differences in presentation and treatment of patients with non-valvular atrial fibrillation: results from RAMSES study.

Turk Kardiyol Dern Ars 2017 Jan;45(1):16-25

Department of Cardiology, Muğla Sıtkı Koçman University Faculty of Medicine, Muğla, Turkey.

Objective: Gender is an important feature in the management of atrial fibrillation (AF). This study investigated gender-related differences in patients with AF in Turkey.

Methods: As a part of RAMSES (ReAl-life Multicenter Survey Evaluating Stroke prevention strategies in Turkey, NCT02344901) study, information of the patients with AF who successively applied to the hospital was analyzed. Read More

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http://dx.doi.org/10.5543/tkda.2016.89894DOI Listing
January 2017
79 Reads

Association between MMP-3 and MMP-9 polymorphisms and coronary artery disease.

Biomed Rep 2016 Dec 18;5(6):709-714. Epub 2016 Oct 18.

Cardiovascular Surgery, Heart Center, Cumhuriyet University, Sivas 58140, Turkey.

Matrix metalloproteinase (MMP)-3 and MMP-9 polymorphisms are characterized by plaque stability in coronary arteries. The aim of the current study was to investigate the polymorphism in the gene and C/T polymorphism in the gene in patients with coronary artery disease (CAD). The study population consisted of 400 patients who underwent coronary angiography. Read More

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http://dx.doi.org/10.3892/br.2016.782DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5228363PMC
December 2016
8 Reads

Which Coronary Lesions Are More Prone to Cause Acute Myocardial Infarction?

Arq Bras Cardiol 2017 Feb 16;108(2):149-153. Epub 2017 Jan 16.

Dumlupinar University Kutahya Evliya Celebi Education and Research Hospital, Kutahya - Turkey.

Background:: According to common belief, most myocardial infarctions (MIs) are due to the rupture of nonsevere, vulnerable plaques with < 70% obstruction. Data from recent trials challenge this belief, suggesting that the risk of coronary occlusion is, in fact, much higher after severe stenosis. The aim of this study was to investigate whether or not acute ST-elevation MIs result from high-grade stenoses by evaluating the presence of coronary collateral circulation (CCC). Read More

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http://www.gnresearch.org/doi/10.5935/abc.20170003
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http://dx.doi.org/10.5935/abc.20170003DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5344660PMC
February 2017
16 Reads

Bilateral choanal atresia in an adult woman with pycnodysostosis.

Congenit Anom (Kyoto) 2017 May;57(3):91-92

Department of Medical Genetics, Faculty of Medicine, Ankara University, Ankara, Turkey.

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http://dx.doi.org/10.1111/cga.12204DOI Listing
May 2017
14 Reads

Prediction of fractional flow reserve with angiographic DILEMMA score.

Anatol J Cardiol 2017 Apr 10;17(4):285-292. Epub 2016 Nov 10.

Department of Cardiology, Heart Center, Cumhuriyet University Health Services Training and Research Hospital, Cumhuriyet University; Sivas-Turkey.

Objective: Angiographic assessment of stenosis has limited predictive value for functionally significant lesions compared with fractional flow reserve (FFR). The recently developed angiographic DILEMMA score, which consists of minimal lumen diameter (MLD), lesion length (LL) and Bypass Angioplasty Revascularization Investigation (BARI) Myocardial Jeopardy Index (MJI) was found to have diagnostic value in predicting FFR ≤0.80. Read More

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http://dx.doi.org/10.14744/AnatolJCardiol.2016.7379DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5469108PMC
April 2017
8 Reads

Impact of valvular heart disease on oral anticoagulant therapy in non-valvular atrial fibrillation: results from the RAMSES study.

J Thromb Thrombolysis 2017 Feb;43(2):157-165

Department of Cardiology, Faculty of Medicine, Mugla Sitki Kocman Universitesi Tip Fakultesi, Orhaniye Mah. Haluk Özsoy Cad., 48000, Muğla, Turkey.

The definition of non-valvular atrial fibrillation (NVAF) is controversial. We aimed to assess the impact of valvular heart disease on stroke prevention strategies in NVAF patients. The RAMSES study was a multicenter and cross-sectional study conducted on NVAF patients (ClinicalTrials. Read More

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http://dx.doi.org/10.1007/s11239-016-1445-1DOI Listing
February 2017
209 Reads