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https://www.readbyqxmd.com/read/29906168/bending-rigidity-of-2d-silica
#1
C Büchner, S D Eder, T Nesse, D Kuhness, P Schlexer, G Pacchioni, J R Manson, M Heyde, B Holst, H-J Freund
A chemically stable bilayers of SiO_{2} (2D silica) is a new, wide band gap 2D material. Up till now graphene has been the only 2D material where the bending rigidity has been measured. Here we present inelastic helium atom scattering data from 2D silica on Ru(0001) and extract the first bending rigidity, κ, measurements for a nonmonoatomic 2D material of definable thickness. We find a value of κ=8.8  eV±0.5  eV which is of the same order of magnitude as theoretical values in the literature for freestanding crystalline 2D silica...
June 1, 2018: Physical Review Letters
https://www.readbyqxmd.com/read/29897237/stability-of-fevo-4-under-pressure-an-x-ray-diffraction-and-first-principles-study
#2
Sinhué López-Moreno, Daniel Errandonea, Julio Pellicer-Porres, Domingo Martínez-García, Sadeque J Patwe, S Nagabhusan Achary, Avesh Kumar Tyagi, Placida Rodríguez-Hernández, Alfonso Muñoz, Catalin Popescu
The high-pressure behavior of the crystalline structure FeVO4 has been studied by means of X-ray diffraction using a diamond-anvil cell and first-principles calculations. The experiments were carried out up to a pressure of 12.3 GPa, until now the highest pressure reached to study an FeVO4 compound. High-pressure X-ray diffraction measurements show that the triclinic P1̅ (FeVO4 -I) phase remains stable up to ≈3 GPa; then a first-order phase transition to a new monoclinic polymorph of FeVO4 (FeVO4 -II') with space group C2/ m is observed, having an α-MnMoO4 -type structure...
June 13, 2018: Inorganic Chemistry
https://www.readbyqxmd.com/read/29869389/temperature-controlled-rhythmic-gene-expression-in-endothermic-mammals-all-diurnal-rhythms-are-equal-but-some-are-circadian
#3
REVIEW
Marco Preußner, Florian Heyd
The circadian clock is a cell autonomous oscillator that controls many aspects of physiology through generating rhythmic gene expression in a time of day dependent manner. In addition, in endothermic mammals body temperature cycles contribute to rhythmic gene expression. These body temperature-controlled rhythms are hard to distinguish from classic circadian rhythms if analyzed in vivo in endothermic organisms. However, they do not fulfill all criteria of being circadian if analyzed in cell culture or in conditions where body temperature of an endothermic organism can be manipulated...
June 4, 2018: BioEssays: News and Reviews in Molecular, Cellular and Developmental Biology
https://www.readbyqxmd.com/read/29774919/modelling-the-atomic-arrangement-of-amorphous-2d-silica-a-network-analysis
#4
Projesh Kumar Roy, Markus Heyde, Andreas Heuer
The recent experimental discovery of a semi two-dimensional silica glass has offered a realistic description of the random network theory of a silica glass structure, initially discussed by Zachariasen. To study the structure formation of silica in two dimensions, we introduce a two-body force field, based on a soft core Yukawa potential. The different configurations, sampled via Molecular dynamics simulations, can be directly compared with the experimental structures, which have been provided in the literature...
May 18, 2018: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29754233/programming-biomaterial-interactions-using-engineered-living-cells
#5
Keith C Heyde, Warren C Ruder
We have developed a biomaterials interface that allows the properties of a functionalized surface to be controlled by a population of genetically engineered bacteria. This interface was engineered by linking a genetically modified E. coli strain with a chemically functionalized surface. Critically, the E. coli was engineered to upregulate the production of biotin when induced by a small signaling molecule. This biotin would then interact with the functionalized surface to modulate the surface's binding dynamics...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29738859/analysis-of-a-unilateral-bridging-cage-for-lumbar-interbody-fusion-2-year-clinical-results-and-fusion-rate-with-a-focus-on-subsidence
#6
Nicolas Heinz von der Hoeh, Tomaso Villa, Fabio Galbusera Galbusera, Anna Voelker, Ulrich A Spiegl, Jan-Sven Jarvers, Christoph-Eckhard Heyde
PURPOSE: The aim of this study was to evaluate the biomechanical stability and the clinical and radiographic outcomes of patients undergoing transforaminal lumbar interbody fusion (TLIF) using an oblique bridging cage with a particular focus on subsidence. METHODS: Finite element models (FEMs) were developed to compare the biomechanics of the oblique cage with conventional PLIF and banana-shaped cages with TLIF. Additionally, a retrospective review of a prospective collected database was performed to investigate the clinical and radiological results with a focus on the subsidence rate using an oblique polyetheretherketone (PEEK) cage with a bicortical load-bearing design...
May 5, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29688718/a-two-dimensional-zigzag-silica-polymorph-on-a-metal-support
#7
David Kuhness, Hyun Jin Yang, Hagen W Klemm, Mauricio Prieto, Gina Peschel, Alexander Fuhrich, Dietrich Menzel, Thomas Schmidt, Xin Yu, Shamil Shaikhutdinov, Adrian Lewandowski, Markus Heyde, Anna Kelemen, Radoslaw Wlodarczyk, Denis Usvyat, Martin Schütz, Joachim Sauer, Hans-Joachim Freund
We present a new polymorph of the two dimensional (2D) silica film with a characteristic 'zigzag' line structure and a rectangular unit cell which forms on a Ru(0001) metal substrate. This new silica polymorph may allow for important insights into growth modes and transformations of 2D silica films as a model system for the study of glass transitions. Based on scanning tunneling microscopy, low energy electron diffraction, infrared reflection absorption spectroscopy and x-ray photo-electron spectroscopy measurements on the one hand, and density functional theory calculations on the other, a structural model for the 'zigzag' polymorph is proposed...
April 24, 2018: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29686255/presence-and-user-experience-in-a-virtual-environment-under-the-influence-of-ethanol-an-explorative-study
#8
Mario Lorenz, Jennifer Brade, Lisa Diamond, Daniel Sjölie, Marc Busch, Manfred Tscheligi, Philipp Klimant, Christoph-E Heyde, Niels Hammer
Virtual Reality (VR) is used for a variety of applications ranging from entertainment to psychological medicine. VR has been demonstrated to influence higher order cognitive functions and cortical plasticity, with implications on phobia and stroke treatment. An integral part for successful VR is a high sense of presence - a feeling of 'being there' in the virtual scenario. The underlying cognitive and perceptive functions causing presence in VR scenarios are however not completely known. It is evident that the brain function is influenced by drugs, such as ethanol, potentially confounding cortical plasticity, also in VR...
April 23, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29565364/erratum-the-beaker-phenomenon-and-the-genomic-transformation-of-northwest-europe
#9
Iñigo Olalde, Selina Brace, Morten E Allentoft, Ian Armit, Kristian Kristiansen, Thomas Booth, Nadin Rohland, Swapan Mallick, Anna Szécsényi-Nagy, Alissa Mittnik, Eveline Altena, Mark Lipson, Iosif Lazaridis, Thomas K Harper, Nick Patterson, Nasreen Broomandkhoshbacht, Yoan Diekmann, Zuzana Faltyskova, Daniel Fernandes, Matthew Ferry, Eadaoin Harney, Peter de Knijff, Megan Michel, Jonas Oppenheimer, Kristin Stewardson, Alistair Barclay, Kurt Werner Alt, Corina Liesau, Patricia Ríos, Concepción Blasco, Jorge Vega Miguel, Roberto Menduiña García, Azucena Avilés Fernández, Eszter Bánffy, Maria Bernabò-Brea, David Billoin, Clive Bonsall, Laura Bonsall, Tim Allen, Lindsey Büster, Sophie Carver, Laura Castells Navarro, Oliver E Craig, Gordon T Cook, Barry Cunliffe, Anthony Denaire, Kirsten Egging Dinwiddy, Natasha Dodwell, Michal Ernée, Christopher Evans, Milan Kuchařík, Joan Francès Farré, Chris Fowler, Michiel Gazenbeek, Rafael Garrido Pena, María Haber-Uriarte, Elżbieta Haduch, Gill Hey, Nick Jowett, Timothy Knowles, Ken Massy, Saskia Pfrengle, Philippe Lefranc, Olivier Lemercier, Arnaud Lefebvre, César Heras Martínez, Virginia Galera Olmo, Ana Bastida Ramírez, Joaquín Lomba Maurandi, Tona Majó, Jacqueline I McKinley, Kathleen McSweeney, Balázs Gusztáv Mende, Alessandra Modi, Gabriella Kulcsár, Viktória Kiss, András Czene, Róbert Patay, Anna Endrődi, Kitti Köhler, Tamás Hajdu, Tamás Szeniczey, János Dani, Zsolt Bernert, Maya Hoole, Olivia Cheronet, Denise Keating, Petr Velemínský, Miroslav Dobeš, Francesca Candilio, Fraser Brown, Raúl Flores Fernández, Ana-Mercedes Herrero-Corral, Sebastiano Tusa, Emiliano Carnieri, Luigi Lentini, Antonella Valenti, Alessandro Zanini, Clive Waddington, Germán Delibes, Elisa Guerra-Doce, Benjamin Neil, Marcus Brittain, Mike Luke, Richard Mortimer, Jocelyne Desideri, Marie Besse, Günter Brücken, Mirosław Furmanek, Agata Hałuszko, Maksym Mackiewicz, Artur Rapiński, Stephany Leach, Ignacio Soriano, Katina T Lillios, João Luís Cardoso, Michael Parker Pearson, Piotr Włodarczak, T Douglas Price, Pilar Prieto, Pierre-Jérôme Rey, Roberto Risch, Manuel A Rojo Guerra, Aurore Schmitt, Joël Serralongue, Ana Maria Silva, Václav Smrčka, Luc Vergnaud, João Zilhão, David Caramelli, Thomas Higham, Mark G Thomas, Douglas J Kennett, Harry Fokkens, Volker Heyd, Alison Sheridan, Karl-Göran Sjögren, Philipp W Stockhammer, Johannes Krause, Ron Pinhasi, Wolfgang Haak, Ian Barnes, Carles Lalueza-Fox, David Reich
This corrects the article DOI: 10.1038/nature25738.
March 21, 2018: Nature
https://www.readbyqxmd.com/read/29557790/electrically-active-induced-energy-levels-and-metastability-of-b-and-n-vacancy-complexes-in-4h-sic
#10
E Igumbor, O Olaniyan, R E Mapasha, H T Danga, E Omotoso, W E Meyer
Electrically active induced energy levels in semiconductor devices could be beneficial to the discovery of an enhanced p or n-type semiconductor. Nitrogen (N) implanted into 4H-SiC is a high energy process that produced high defect concentrations which could be removed during dopant activation annealing. On the other hand, boron (B) substituted for silicon in SiC causes a reduction in the number of defects. This scenario leads to a decrease in the dielectric properties and induced deep donor and shallow acceptor levels...
May 10, 2018: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/29523490/thrombotic-microangiopathy-in-a-very-young-infant-with-mitral-valvuloplasty
#11
Yuka Matsunaga, Masataka Ishimura, Hazumu Nagata, Kiyoshi Uike, Tadamune Kinjo, Masayuki Ochiai, Kenichiro Yamamura, Hidetoshi Takada, Yoshihisa Tanoue, Masaki Hayakawa, Masanori Matsumoto, Toshiro Hara, Shouichi Ohga
BACKGROUND: Thrombotic microangiopathies (TMA) are microvascular occlusive disorders characterized by systemic or intrarenal platelet aggregation, thrombocytopenia, and red cell fragmentation. Post-operative TMA mostly occurs in adult patients with cardiovascular surgery, with the distinct pathophysiology from classical thrombotic thrombocytopenic purpura (TTP) although the exact pathophysiology remains unclear. CASE PRESENTATION: A one-month-old infant developed TMA after the initial surgery of double outlet right ventricle...
February 7, 2018: Pediatrics and Neonatology
https://www.readbyqxmd.com/read/29518943/structural-electronic-and-thermodynamic-properties-of-tetragonal-t-si-x-ge-3-x-n%C3%A2
#12
Chenxi Han, Changchun Chai, Qingyang Fan, Jionghao Yang, Yintang Yang
The structural, mechanical, anisotropic, electronic, and thermal properties of t -Si₃N₄, t -Si₂GeN₄, t -SiGe₂N₄, and t -Ge₃N₄ in the tetragonal phase are systematically investigated in the present work. The mechanical stability is proved by the elastic constants of t -Si₃N₄, t -Si₂GeN₄, t -SiGe₂N₄, and t -Ge₃N₄. Moreover, they all demonstrate brittleness, because B/G < 1.75, and v < 0.26. The elastic anisotropy of t -Si₃N₄, t -Si₂GeN₄, t -SiGe₂N₄, and t -Ge₃N₄ is characterized by Poisson's ratio, Young's modulus, the percentage of elastic anisotropy for bulk modulus AB , the percentage of elastic anisotropy for shear modulus AG , and the universal anisotropic index A U ...
March 7, 2018: Materials
https://www.readbyqxmd.com/read/29505408/realistic-vendor-specific-synthetic-ultrasound-data-for-quality-assurance-of-2-d-speckle-tracking-echocardiography-simulation-pipeline-and-open-access-database
#13
Martino Alessandrini, Bidisha Chakraborty, Brecht Heyde, Olivier Bernard, Mathieu De Craene, Maxime Sermesant, Jan D'Hooge
Two-dimensional (2-D) echocardiography is the modality of choice in the clinic for the diagnosis of cardiac disease. Hereto, speckle tracking (ST) packages complement visual assessment by the cardiologist by providing quantitative diagnostic markers of global and regional cardiac function (e.g., displacement, strain, and strain-rate). Yet, the reported high vendor-dependence between the outputs of different ST packages raises clinical concern and hampers the widespread dissemination of the ST technology. In part, this is due to the lack of a solid commonly accepted quality assurance pipeline for ST packages...
March 2018: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/29466337/the-beaker-phenomenon-and-the-genomic-transformation-of-northwest-europe
#14
Iñigo Olalde, Selina Brace, Morten E Allentoft, Ian Armit, Kristian Kristiansen, Thomas Booth, Nadin Rohland, Swapan Mallick, Anna Szécsényi-Nagy, Alissa Mittnik, Eveline Altena, Mark Lipson, Iosif Lazaridis, Thomas K Harper, Nick Patterson, Nasreen Broomandkhoshbacht, Yoan Diekmann, Zuzana Faltyskova, Daniel Fernandes, Matthew Ferry, Eadaoin Harney, Peter de Knijff, Megan Michel, Jonas Oppenheimer, Kristin Stewardson, Alistair Barclay, Kurt Werner Alt, Corina Liesau, Patricia Ríos, Concepción Blasco, Jorge Vega Miguel, Roberto Menduiña García, Azucena Avilés Fernández, Eszter Bánffy, Maria Bernabò-Brea, David Billoin, Clive Bonsall, Laura Bonsall, Tim Allen, Lindsey Büster, Sophie Carver, Laura Castells Navarro, Oliver E Craig, Gordon T Cook, Barry Cunliffe, Anthony Denaire, Kirsten Egging Dinwiddy, Natasha Dodwell, Michal Ernée, Christopher Evans, Milan Kuchařík, Joan Francès Farré, Chris Fowler, Michiel Gazenbeek, Rafael Garrido Pena, María Haber-Uriarte, Elżbieta Haduch, Gill Hey, Nick Jowett, Timothy Knowles, Ken Massy, Saskia Pfrengle, Philippe Lefranc, Olivier Lemercier, Arnaud Lefebvre, César Heras Martínez, Virginia Galera Olmo, Ana Bastida Ramírez, Joaquín Lomba Maurandi, Tona Majó, Jacqueline I McKinley, Kathleen McSweeney, Balázs Gusztáv Mende, Alessandra Modi, Gabriella Kulcsár, Viktória Kiss, András Czene, Róbert Patay, Anna Endrődi, Kitti Köhler, Tamás Hajdu, Tamás Szeniczey, János Dani, Zsolt Bernert, Maya Hoole, Olivia Cheronet, Denise Keating, Petr Velemínský, Miroslav Dobeš, Francesca Candilio, Fraser Brown, Raúl Flores Fernández, Ana-Mercedes Herrero-Corral, Sebastiano Tusa, Emiliano Carnieri, Luigi Lentini, Antonella Valenti, Alessandro Zanini, Clive Waddington, Germán Delibes, Elisa Guerra-Doce, Benjamin Neil, Marcus Brittain, Mike Luke, Richard Mortimer, Jocelyne Desideri, Marie Besse, Günter Brücken, Mirosław Furmanek, Agata Hałuszko, Maksym Mackiewicz, Artur Rapiński, Stephany Leach, Ignacio Soriano, Katina T Lillios, João Luís Cardoso, Michael Parker Pearson, Piotr Włodarczak, T Douglas Price, Pilar Prieto, Pierre-Jérôme Rey, Roberto Risch, Manuel A Rojo Guerra, Aurore Schmitt, Joël Serralongue, Ana Maria Silva, Václav Smrčka, Luc Vergnaud, João Zilhão, David Caramelli, Thomas Higham, Mark G Thomas, Douglas J Kennett, Harry Fokkens, Volker Heyd, Alison Sheridan, Karl-Göran Sjögren, Philipp W Stockhammer, Johannes Krause, Ron Pinhasi, Wolfgang Haak, Ian Barnes, Carles Lalueza-Fox, David Reich
From around 2750 to 2500 bc, Bell Beaker pottery became widespread across western and central Europe, before it disappeared between 2200 and 1800 bc. The forces that propelled its expansion are a matter of long-standing debate, and there is support for both cultural diffusion and migration having a role in this process. Here we present genome-wide data from 400 Neolithic, Copper Age and Bronze Age Europeans, including 226 individuals associated with Beaker-complex artefacts. We detected limited genetic affinity between Beaker-complex-associated individuals from Iberia and central Europe, and thus exclude migration as an important mechanism of spread between these two regions...
March 8, 2018: Nature
https://www.readbyqxmd.com/read/29397472/gastrointestinal-bleeding-in-native-and-prosthetic-valve-disease
#15
REVIEW
Joseph L Blackshear
Gastrointestinal bleeding with severe aortic stenosis was originally described in the 1950s by Heyde, although for years, the association was debated. Further discovery of mechanisms and the ubiquity and severity of acquired von Willebrand syndrome in the left ventricular assist device therapy have removed any doubts. At this time, gastrointestinal bleeding from intestinal angiodysplasia in patients with turbulence-related proteolysis of the highest molecular weight multimers of von Willebrand factor is now known to occur in patients with aortic stenosis, and also subaortic obstruction and associated mitral insufficiency in hypertrophic cardiomyopathy, isolated mitral and aortic insufficiency, endocarditis, and in patients with prosthetic valve dysfunction, either from stenosis or insufficiency...
February 3, 2018: Current Treatment Options in Cardiovascular Medicine
https://www.readbyqxmd.com/read/29392286/mechanisms-of-vowel-variation-in-african-american-english
#16
Yolanda Feimster Holt
Purpose: This research explored mechanisms of vowel variation in African American English by comparing 2 geographically distant groups of African American and White American English speakers for participation in the African American Shift and the Southern Vowel Shift. Method: Thirty-two male (African American: n = 16, White American controls: n = 16) lifelong residents of cities in eastern and western North Carolina produced heed,hid,heyd,head,had,hod,hawed,whod,hood,hoed,hide,howed,hoyd, and heard 3 times each in random order...
February 15, 2018: Journal of Speech, Language, and Hearing Research: JSLHR
https://www.readbyqxmd.com/read/29303174/oxygen-induced-degradation-of-the-electronic-properties-of-thin-layer-inse
#17
Xin Wei, Chaofang Dong, Aoni Xu, Xiaogang Li, Digby D Macdonald
Thin-layer indium selenide (InSe) compounds, as two-dimensional (2D) semiconductors, have been widely and intensively studied due to their high electron mobility and environmental stability. Here, we report a study demonstrating the oxygen-induced degradation of monolayer and bilayer InSe nanosheets using first-principles calculations and deformation potential theory. It is evident that O atoms prefer to substitute Se atoms instead of undergoing adsorption onto surfaces, while interstitial sites are the most stable adsorption sites of O atoms in the interior for both monolayer and bilayer InSe...
January 24, 2018: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29289249/the-beginnings-of-alpine-transhumance-isotopic-insights-into-neolithic-cattle-herding
#18
Claudia Gerling, Thomas Doppler, Alistair W G Pike, Corina Knipper, Volker Heyd, Thomas Kuhn, Moritz F Lehmann, Jörg Schibler
No abstract text is available yet for this article.
December 1, 2017: Chimia
https://www.readbyqxmd.com/read/29273797/thy-1-dependent-uptake-of-mesenchymal-stem-cell-derived-extracellular-vesicles-blocks-myofibroblastic-differentiation
#19
Tzu-Pin Shentu, Tse-Shun Huang, Mateja Cernelc-Kohan, Joy Chan, Simon S Wong, Celia R Espinoza, Chunting Tan, Irene Gramaglia, Henri van der Heyde, Shu Chien, James S Hagood
Bone marrow-derived mesenchymal stem cells (MSC) have been promoted for multiple therapeutic applications. Many beneficial effects of MSCs are paracrine, dependent on extracellular vesicles (EVs). Although MSC-derived EVs (mEVs) are beneficial for acute lung injury and pulmonary fibrosis, mechanisms of mEV uptake by lung fibroblasts and their effects on myofibroblastic differentiation have not been established. We demonstrate that mEVs, but not fibroblast EVs (fEVs), suppress TGFβ1-induced myofibroblastic differentiation of normal and idiopathic pulmonary fibrosis (IPF) lung fibroblasts...
December 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29260418/is-cytoreductive-surgery-with-hyperthermic-intraperitoneal-chemotherapy-justified-for-biphasic-variants-of-peritoneal-mesothelioma-outcomes-from-the-peritoneal-surface-oncology-group-international-registry
#20
Konstantinos I Votanopoulos, Paul Sugarbaker, Marcello Deraco, David Morris, Olivier Glehen, Dominique Elias, Michele De Simone, Manuela Robella, Bruno Heyd, Shigeki Kusamura, Dario Baratti, Konstantinos Chouliaras, Greg Russell, Perry Shen, Edward A Levine
BACKGROUND: Cytoreductive surgery and hyperthermic intraperitoneal chemotherapy (CRS/HIPEC) has dramatically improved the survival of patients with epithelioid peritoneal mesothelioma. It is unknown if CRS/HIPEC is indicated for the more aggressive biphasic mesothelioma variant. METHODS: A retrospective analysis of the Peritoneal Surface Oncology Group International (PSOGI) registry including data from 33 centers was performed. Survival was reviewed based on mesothelioma type, completion of cytoreduction, and volume of disease...
March 2018: Annals of Surgical Oncology
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