keyword
MENU ▼
Read by QxMD icon Read
search

Tectonics

keyword
https://www.readbyqxmd.com/read/28107474/enacted-reading-comprehension-using-bodily-movement-to-aid-the-comprehension-of-abstract-text-content
#1
Michael P Kaschak, Carol M Connor, Jennifer L Dombek
We report a design study that assessed the feasibility of Enacted Reading Comprehension (ERC), an intervention designed to teach 3rd and 4th grade students (n = 40 and 25, respectively) to use gestures to understand an increasingly abstract set of texts. Students were taught to use gestures to understand the idea of "opposing forces" in a concrete setting-the forces at play as tectonic plates move past each other-and then taught to use the gestures to understand opposing forces in more abstract situations. For example, students were taught to use gestures to understand the opposing sides of an argument, and to understand the internal conflicts that arise as individuals are faced with moral dilemmas...
2017: PloS One
https://www.readbyqxmd.com/read/28080168/corneal-melt-after-boston-keratoprosthesis-clinical-presentation-management-outcomes-and-risk-factor-analysis
#2
Soumaya Bouhout, Marie-Claude Robert, Sousans Deli, Mona Harissi-Dagher
PURPOSE: To determine the presentation, risk factors, and outcomes of keratolysis after Boston type I keratoprosthesis (B-KPro). METHODS: Retrospective chart review. RESULTS: A total of 16 (14%) of the 110 eyes (96 patients) which underwent B-KPro implantation developed keratolysis at an average 20 ± 11 months. Retroprosthetic membrane (RPM), infectious keratitis, and corneal dellen were identified in 31%, 25%, and 13% of corneal melts, respectively...
January 12, 2017: Ocular Immunology and Inflammation
https://www.readbyqxmd.com/read/28067845/selection-of-prebiotic-molecules-in-amphiphilic-environments
#3
Christian Mayer, Ulrich Schreiber, María J Dávila
A basic problem in all postulated pathways of prebiotic chemistry is the low concentration which generally is expected for interesting reactants in fluid environments. Even though compounds, like nucleobases, sugars or peptides, principally may form spontaneously under environmental conditions, they will always be rapidly diluted in an aqueous environment. In addition, any such reaction leads to side products which often exceed the desired compound and generally hamper the first steps of a subsequent molecular evolution...
January 7, 2017: Life
https://www.readbyqxmd.com/read/28054561/pliocene-oceanic-seaways-and-global-climate
#4
Cyrus Karas, Dirk Nürnberg, André Bahr, Jeroen Groeneveld, Jens O Herrle, Ralf Tiedemann, Peter B deMenocal
Tectonically induced changes in oceanic seaways had profound effects on global and regional climate during the Late Neogene. The constriction of the Central American Seaway reached a critical threshold during the early Pliocene ~4.8-4 million years (Ma) ago. Model simulations indicate the strengthening of the Atlantic Meridional Overturning Circulation (AMOC) with a signature warming response in the Northern Hemisphere and cooling in the Southern Hemisphere. Subsequently, between ~4-3 Ma, the constriction of the Indonesian Seaway impacted regional climate and might have accelerated the Northern Hemisphere Glaciation...
January 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28049039/new-insights-into-the-phylogeny-of-burasaieae-menispermaceae-with-the-recognition-of-a-new-genus-and-emphasis-on-the-southern-taiwanese-and-mainland-chinese-disjunction
#5
Wei Wang, Rosa Del C Ortiz, Frédéric M B Jacques, Shih-Wen Chung, Yang Liu, Xiao-Guo Xiang, Zhi-Duan Chen
Taiwan is a continental island lying at the boundary between the Eurasian and the Philippine tectonic plates and possesses high biodiversity. Southern Taiwan, viz. Hengchun Peninsula, is notably floristically different from northern Taiwan. The floristic origin and relationships of the Hengchun Peninsula have been rarely investigated in a phylogenetic context. In this study, data from six plastid and nuclear sequences were used to reconstruct phylogenetic relationships within Burasaieae (Menispermaceae), which mainly inhabits tropical rainforests...
December 31, 2016: Molecular Phylogenetics and Evolution
https://www.readbyqxmd.com/read/28028535/kinematics-and-dynamics-of-the-east-pacific-rise-linked-to-a-stable-deep-mantle-upwelling
#6
David B Rowley, Alessandro M Forte, Christopher J Rowan, Petar Glišović, Robert Moucha, Stephen P Grand, Nathan A Simmons
Earth's tectonic plates are generally considered to be driven largely by negative buoyancy associated with subduction of oceanic lithosphere. In this context, mid-ocean ridges (MORs) are passive plate boundaries whose divergence accommodates flow driven by subduction of oceanic slabs at trenches. We show that over the past 80 million years (My), the East Pacific Rise (EPR), Earth's dominant MOR, has been characterized by limited ridge-perpendicular migration and persistent, asymmetric ridge accretion that are anomalous relative to other MORs...
December 2016: Science Advances
https://www.readbyqxmd.com/read/28004655/the-role-of-space-based-observation-in-understanding-and-responding-to-active-tectonics-and-earthquakes
#7
REVIEW
J R Elliott, R J Walters, T J Wright
No abstract text is available yet for this article.
December 22, 2016: Nature Communications
https://www.readbyqxmd.com/read/27980206/large-gem-diamonds-from-metallic-liquid-in-earth-s-deep-mantle
#8
Evan M Smith, Steven B Shirey, Fabrizio Nestola, Emma S Bullock, Jianhua Wang, Stephen H Richardson, Wuyi Wang
The redox state of Earth's convecting mantle, masked by the lithospheric plates and basaltic magmatism of plate tectonics, is a key unknown in the evolutionary history of our planet. Here we report that large, exceptional gem diamonds like the Cullinan, Constellation, and Koh-i-Noor carry direct evidence of crystallization from a redox-sensitive metallic liquid phase in the deep mantle. These sublithospheric diamonds contain inclusions of solidified iron-nickel-carbon-sulfur melt, accompanied by a thin fluid layer of methane ± hydrogen, and sometimes majoritic garnet or former calcium silicate perovskite...
December 16, 2016: Science
https://www.readbyqxmd.com/read/27969550/characterizing-flow-pathways-in-a-sandstone-aquifer-tectonic-vs-sedimentary-heterogeneities
#9
G Medici, L J West, N P Mountney
Sandstone aquifers are commonly assumed to represent porous media characterized by a permeable matrix. However, such aquifers may be heavy fractured when rock properties and timing of deformation favour brittle failure and crack opening. In many aquifer types, fractures associated with faults, bedding planes and stratabound joints represent preferential pathways for fluids and contaminants. In this paper, well test and outcrop-scale studies reveal how strongly lithified siliciclastic rocks may be entirely dominated by fracture flow at shallow depths (≤180m), similar to limestone and crystalline aquifers...
September 24, 2016: Journal of Contaminant Hydrology
https://www.readbyqxmd.com/read/27935680/self-assembling-nanocomposite-tectons
#10
Jianyuan Zhang, Peter J Santos, Paul A Gabrys, Sangho Lee, Caroline Liu, Robert J Macfarlane
The physical characteristics of composite materials are dictated by both the chemical composition and spatial configuration of each constituent phase. A major challenge in nanoparticle-based composites is developing methods to precisely dictate particle positions at the nanometer length scale, as this would allow complete control over nanocomposite structure-property relationships. In this work, we present a new class of building blocks called nanocomposite tectons (NCTs), which consist of inorganic nanoparticles grafted with a dense layer of polymer chains that terminate in molecular recognition units capable of programmed supramolecular bonding...
December 21, 2016: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/27934408/variation-of-the-molecular-conformation-shape-and-cavity-size-in-dinuclear-metalla-macrocycles-containing-hetero-ditopic-dithiocarbamate-carboxylate-ligands-from-a-homologous-series-of-n-substituted-amino-acids
#11
Aaron Torres-Huerta, Jorge Cruz-Huerta, Herbert Höpfl, Luis G Hernández-Vázquez, Jaime Escalante-García, Arturo Jiménez-Sánchez, Rosa Santillan, Irán F Hernández-Ahuactzi, Mario Sánchez
A homologous series of dithiocarbamate ligands derived from N-substituted amino acids was reacted with different diorganotin dichlorides to give 18 diorganotin complexes. Spectroscopic and mass spectrometric analysis evidenced the formation of assemblies with six-coordinate tin atoms embedded in skewed-trapezoidal bipyramidal coordination environments of composition C2SnS2O2. Single-crystal X-ray diffraction analysis for three of the compounds revealed a one-dimensional polymeric structure for the complex with the ligand derived from 5-aminopentanoic acid, which through further intermolecular Sn···O interactions generated an overall two-dimensional coordination polymer containing 40-membered hexanuclear tin macrocycles...
December 5, 2016: Inorganic Chemistry
https://www.readbyqxmd.com/read/27929057/the-importance-of-structural-softening-for-the-evolution-and-architecture-of-passive-margins
#12
T Duretz, B Petri, G Mohn, S M Schmalholz, F L Schenker, O Müntener
Lithospheric extension can generate passive margins that bound oceans worldwide. Detailed geological and geophysical studies in present and fossil passive margins have highlighted the complexity of their architecture and their multi-stage deformation history. Previous modeling studies have shown the significant impact of coarse mechanical layering of the lithosphere (2 to 4 layer crust and mantle) on passive margin formation. We built upon these studies and design high-resolution (~100-300 m) thermo-mechanical numerical models that incorporate finer mechanical layering (kilometer scale) mimicking tectonically inherited heterogeneities...
December 8, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27924946/the-juvenile-hafnium-isotope-signal-as-a-record-of-supercontinent-cycles
#13
Nicholas J Gardiner, Christopher L Kirkland, Martin J Van Kranendonk
Hf isotope ratios measured in igneous zircon are controlled by magmatic source, which may be linked to tectonic setting. Over the 200-500 Myr periodicity of the supercontinent cycle - the principal geological phenomenon controlling prevailing global tectonic style - juvenile Hf signals, i.e. most radiogenic, are typically measured in zircon from granites formed in arc settings (crustal growth), and evolved zircon Hf signals in granites formed in continent-collision settings (crustal reworking). Interrogations of Hf datasets for excursions related to Earth events commonly use the median value, however this may be equivocal due to magma mixing...
December 7, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27922835/2d-self-assembly-of-phenylene-vinylene-tectons-at-the-liquid-highly-oriented-pyrolytic-graphite-interface-from-chain-length-effects-to-anisotropic-guest-host-dynamics
#14
A Six, A Bocheux, F Charra, F Mathevet, D Kreher, A-J Attias
Here we report the synthesis and characterization of a series of new phenylene-vinylene tectons. The study by scanning tunneling microscopy of their supramolecular self-assembly at the interface between a phenyloctane solution and highly oriented pyrolytic graphite  demonstrates that variation of concentration and length of alkyl chains led to the formation of different networks, a compact one and a nanoporous one, with a fine control of the lattice parameters. The study of guest-host properties of the nanoporous network revealed a selectivity toward guest compounds according to their shape and size...
January 13, 2017: Nanotechnology
https://www.readbyqxmd.com/read/27917328/gps-imaging-of-vertical-land-motion-in-california-and-nevada-implications-for-sierra-nevada-uplift
#15
William C Hammond, Geoffrey Blewitt, Corné Kreemer
We introduce Global Positioning System (GPS) Imaging, a new technique for robust estimation of the vertical velocity field of the Earth's surface, and apply it to the Sierra Nevada Mountain range in the western United States. Starting with vertical position time series from Global Positioning System (GPS) stations, we first estimate vertical velocities using the MIDAS robust trend estimator, which is insensitive to undocumented steps, outliers, seasonality, and heteroscedasticity. Using the Delaunay triangulation of station locations, we then apply a weighted median spatial filter to remove velocity outliers and enhance signals common to multiple stations...
October 2016: Journal of Geophysical Research. Solid Earth
https://www.readbyqxmd.com/read/27909816/ecological-and-physical-barriers-shape-genetic-structure-of-the-alpine-porcini-boletus-reticuloceps
#16
Bang Feng, Jian Wei Liu, Jianping Xu, Kuan Zhao, Zai Wei Ge, Zhu L Yang
The Alpine porcini, Boletus reticuloceps, is an ectomycorrhizal mushroom distributed in subalpine areas of Southwest China, central China, and Taiwan Island. This distribution pattern makes it an ideal organism to infer how ectomycorrhizal fungi have reacted to historical tectonic and climatic changes, and to illustrate the mechanism for the disjunction of organisms between Southwest China and Taiwan. In this study, we explored the phylogeographic pattern of B. reticuloceps by microsatellite genotyping, DNA sequencing, ecological factor analysis, and species distribution modeling...
December 1, 2016: Mycorrhiza
https://www.readbyqxmd.com/read/27897168/stepwise-onset-of-the-icehouse-world-and-its-impact-on-oligo-miocene-central-asian-mammals
#17
Mathias Harzhauser, Gudrun Daxner-Höck, Paloma López-Guerrero, Olivier Maridet, Adriana Oliver, Werner E Piller, Sylvain Richoz, Margarita A Erbajeva, Thomas A Neubauer, Ursula B Göhlich
Central Asia is a key area to study the impact of Cenozoic climate cooling on continental ecosystems. One of the best places to search for rather continuous paleontological records is the Valley of Lakes in Mongolia with its outstandingly fossil-rich Oligocene and Miocene terrestrial sediments. Here, we investigate the response by mammal communities during the early stage of Earth's icehouse climate in Central Asia. Based on statistical analyses of occurrence and abundance data of 18608 specimens representing 175 mammal species and geochemical (carbon isotopes) and geophysical (magnetic susceptibility) data we link shifts in diversities with major climatic variations...
November 29, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27884104/phylogeography-reveals-an-ancient-cryptic-radiation-in-east-asian-tree-frogs-hyla-japonica-group-and-complex-relationships-between-continental-and-island-lineages
#18
Christophe Dufresnes, Spartak N Litvinchuk, Amaël Borzée, Yikweon Jang, Jia-Tang Li, Ikuo Miura, Nicolas Perrin, Matthias Stöck
BACKGROUND: In contrast to the Western Palearctic and Nearctic biogeographic regions, the phylogeography of Eastern-Palearctic terrestrial vertebrates has received relatively little attention. In East Asia, tectonic events, along with Pleistocene climatic conditions, likely affected species distribution and diversity, especially through their impact on sea levels and the consequent opening and closing of land-bridges between Eurasia and the Japanese Archipelago. To better understand these effects, we sequenced mitochondrial and nuclear markers to determine phylogeographic patterns in East-Asian tree frogs, with a particular focus on the widespread H...
November 23, 2016: BMC Evolutionary Biology
https://www.readbyqxmd.com/read/27843236/mycobacterium-chelonae-in-a-tectonic-corneal-graft
#19
Haziq Raees Chowdhury, Oliver Comyn, Gill Jones, Mayank A Nanavaty
Atypical mycobacterial infections of the cornea can present with nonspecific inflammatory changes and graft rejection, with no obvious focus to culture and a subsequent delay to diagnosis. These pathogens are well documented in the literature following laser-assisted in situ keratomileusis but have rarely been described following corneal transplant surgery. We report a single case of Mycobacterium chelonae keratitis 1 year after tectonic keratoplasty.
September 2016: Oman Journal of Ophthalmology
https://www.readbyqxmd.com/read/27830704/glacial-isostatic-uplift-of-the-european-alps
#20
Jürgen Mey, Dirk Scherler, Andrew D Wickert, David L Egholm, Magdala Tesauro, Taylor F Schildgen, Manfred R Strecker
Following the last glacial maximum (LGM), the demise of continental ice sheets induced crustal rebound in tectonically stable regions of North America and Scandinavia that is still ongoing. Unlike the ice sheets, the Alpine ice cap developed in an orogen where the measured uplift is potentially attributed to tectonic shortening, lithospheric delamination and unloading due to deglaciation and erosion. Here we show that ∼90% of the geodetically measured rock uplift in the Alps can be explained by the Earth's viscoelastic response to LGM deglaciation...
November 10, 2016: Nature Communications
keyword
keyword
101750
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"