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https://www.readbyqxmd.com/read/28324685/monitoring-and-descriptive-analysis-of-radon-in-relation-to-seismic-activity-of-northern-pakistan
#1
Zeeshan Jilani, Tahir Mehmood, Aftab Alam, Muhammad Awais, Talat Iqbal
Earthquakes are one of the major causes of natural disasters and its forecasting is challenging task. Some precursory phenomenon exists in theory in relation to earthquakes occurrence. The emission of radioactive gas named 'radon' before the earthquakes is a potential earthquake precursory candidate. The study aims to monitor and to analyze the radon in relation to seismic activity in Northern Pakistan. For this purpose RTM-2200 has been used to monitor the changes in radon concentration from August 01, 2014 to January 31, 2015 in Northern Pakistan...
March 16, 2017: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/28290565/molecular-tectonics-hierarchical-organization-of-heterobimetallic-coordination-networks-into-heterotrimetallic-core-shell-crystals
#2
Fan Zhang, Cyril R R Adolf, Nicolas Zigon, Sylvie Ferlay, Nathalie Kyritsakas, Mir Wais Hosseini
Combinations of a neutral Pt(ii) organometallic tecton bearing two triphenylphosphine and two 3-ethynylpyridyl coordinating moieties in trans positions with MX2 complexes (M = Co(ii) and X = Cl(-) or Br(-) and M = Zn(ii) and X = Cl(-)) lead to the formation of isostructural 1D heterobimetallic coordination compounds. By 3D epitaxial growth processes, using coordination bonding, heterotrimetallic core-shell crystals are generated by the growth of crystalline layers on seed crystals.
March 14, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28290529/late-quaternary-faulting-in-the-sevier-desert-driven-by-magmatism
#3
T Stahl, N A Niemi
Seismic hazard in continental rifts varies as a function of strain accommodation by tectonic or magmatic processes. The nature of faulting in the Sevier Desert, located in eastern Basin and Range of central Utah, and how this faulting relates to the Sevier Desert Detachment low-angle normal fault, have been debated for nearly four decades. Here, we show that the geodetic signal of extension across the eastern Sevier Desert is best explained by magma-assisted rifting associated with Plio-Pleistocene volcanism...
March 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28282693/treatment-of-a-perforated-corneal-ulcer-with-tectonic-dsaek-a-case-report
#4
M Jesse, A P Lange
No abstract text is available yet for this article.
March 10, 2017: Klinische Monatsblätter Für Augenheilkunde
https://www.readbyqxmd.com/read/28281334/warm-cold-colonization-response-of-oaks-to-uplift-of-the-himalaya-hengduan-mountains
#5
Hong-Hu Meng, Tao Su, Xiao-Yang Gao, Jie Li, Xiao-Long Jiang, Hang Sun, Zhe-Kun Zhou
Clarifying the relationship between distribution patterns of organisms and geological events is critical to understanding the impact of environmental changes on organismal evolution. Quercus sect. Heterobalanus is now distributed across the Himalaya-Hengduan Mountains (HHM) and warm lowland in East China, yet how the distribution patterns of this group changed in response to the HHM uplift remains largely unknown. This study examines the effect of tectonic events in the HHM region on the oaks, providing a biological perspective on the geological history of this region...
March 9, 2017: Molecular Ecology
https://www.readbyqxmd.com/read/28252103/long-term-ground-deformation-patterns-of-bucharest-using-multi-temporal-insar-and-multivariate-dynamic-analyses-a-possible-transpressional-system
#6
Iuliana Armaş, Diana A Mendes, Răzvan-Gabriel Popa, Mihaela Gheorghe, Diana Popovici
The aim of this exploratory research is to capture spatial evolution patterns in the Bucharest metropolitan area using sets of single polarised synthetic aperture radar (SAR) satellite data and multi-temporal radar interferometry. Three sets of SAR data acquired during the years 1992-2010 from ERS-1/-2 and ENVISAT, and 2011-2014 from TerraSAR-X satellites were used in conjunction with the Small Baseline Subset (SBAS) and persistent scatterers (PS) high-resolution multi-temporal interferometry (InSAR) techniques to provide maps of line-of-sight displacements...
March 2, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28245250/pattern-of-genetic-differentiation-of-an-incipient-speciation-process-the-case-of-the-high-andean-killifish-orestias
#7
Claudia Jimena Guerrero-Jiménez, Fabiola Peña, Pamela Morales, Marco Méndez, Michel Sallaberry, Irma Vila, Elie Poulin
During the Pleistocene and Holocene, the southwest Andean Altiplano (17°-22°S) was affected by repeated fluctuations in water levels, high volcanic activity and major tectonic movements. In the early Holocene the humid Tauca phase shifted to the arid conditions that have lasted until the present, producing endorheic rivers, lakes, lagoons and wetlands. The endemic fish Orestias (Cyprinodontidae) represents a good model to observe the genetic differentiation that characterizes an incipient speciation process in allopatry since the morphospecies described inhabit a restricted geographic area, with present habitat fragmentation...
2017: PloS One
https://www.readbyqxmd.com/read/28241147/earth-s-first-stable-continents-did-not-form-by-subduction
#8
Tim E Johnson, Michael Brown, Nicholas J Gardiner, Christopher L Kirkland, R Hugh Smithies
The geodynamic environment in which Earth's first continents formed and were stabilized remains controversial. Most exposed continental crust that can be dated back to the Archaean eon (4 billion to 2.5 billion years ago) comprises tonalite-trondhjemite-granodiorite rocks (TTGs) that were formed through partial melting of hydrated low-magnesium basaltic rocks; notably, these TTGs have 'arc-like' signatures of trace elements and thus resemble the continental crust produced in modern subduction settings. In the East Pilbara Terrane, Western Australia, low-magnesium basalts of the Coucal Formation at the base of the Pilbara Supergroup have trace-element compositions that are consistent with these being source rocks for TTGs...
February 27, 2017: Nature
https://www.readbyqxmd.com/read/28238431/assessing-seawater-intrusion-in-an-arid-coastal-aquifer-under-high-anthropogenic-influence-using-major-constituents-sr-and-b-isotopes-in-groundwater
#9
J Mahlknecht, D Merchán, M Rosner, A Meixner, R Ledesma-Ruiz
The La Paz aquifer system (Baja California Sur, Mexico) is under severe anthropogenic pressure because of high groundwater abstraction for urban supply (city of La Paz, around 222,000 inhabitants) and irrigated agriculture (1900ha). In consequence, seawater has infiltrated the aquifer, forcing the abandonment of wells with increased salinity. The objective of this study was to assess seawater intrusion, understand the hydrogeochemical processes involved and estimate the contribution of seawater in the wells tested...
February 23, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28220851/first-evidence-of-denitrification-vis-%C3%A3-vis-monsoon-in-the-arabian-sea-since-late-miocene
#10
Shubham Tripathi, Manish Tiwari, Jongmin Lee, Boo-Keun Khim
In the Arabian Sea, South Asian monsoon (SAM)-induced high surface water productivity coupled with poor ventilation of intermediate water results in strong denitrification within the oxygen minimum zone (OMZ). Despite the significance of denitrification in the Arabian Sea, we have no long-term record of its evolution spanning the past several million years. Here, we present the first record of denitrification evolution since Late Miocene (~10.2 Ma) in the Eastern Arabian Sea, where the SAM generates moderate surface water productivity, based on the samples retrieved during the International Ocean Discovery Program (IODP) Expedition 355...
February 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28211459/gravitational-body-forces-focus-north-american-intraplate-earthquakes
#11
Will Levandowski, Mark Zellman, Rich Briggs
Earthquakes far from tectonic plate boundaries generally exploit ancient faults, but not all intraplate faults are equally active. The North American Great Plains exemplify such intraplate earthquake localization, with both natural and induced seismicity generally clustered in discrete zones. Here we use seismic velocity, gravity and topography to generate a 3D lithospheric density model of the region; subsequent finite-element modelling shows that seismicity focuses in regions of high-gravity-derived deviatoric stress...
February 17, 2017: Nature Communications
https://www.readbyqxmd.com/read/28199442/phylogeographic-history-of-south-american-populations-of-the-silky-anteater-cyclopes-didactylus-pilosa-cyclopedidae
#12
Raphael Teodoro Franciscani Coimbra, Flávia Regina Miranda, Camila Clozato Lara, Marco Antônio Alves Schetino, Fabrício Rodrigues Dos Santos
Cyclopes didactylus, commonly called silky anteater, is the smallest and least studied of the anteaters. It is an arboreal species occurring in rainforests, ranging from southern Mexico to Central and South America, with an apparently disjoint distribution between Amazon and Atlantic rainforests in Brazil. Although seven subspecies are recognized, little is known about its geographical variation. Thus, to evaluate the population dynamics and evolutionary history of the South American silky anteater, we analyzed 1542 bp sequences of the mitochondrial control region (CR), COI and Cyt-b genes of 32 individuals...
February 13, 2017: Genetics and Molecular Biology
https://www.readbyqxmd.com/read/28196688/biodiversity-and-topographic-complexity-modern-and-geohistorical-perspectives
#13
REVIEW
Catherine Badgley, Tara M Smiley, Rebecca Terry, Edward B Davis, Larisa R G DeSantis, David L Fox, Samantha S B Hopkins, Tereza Jezkova, Marjorie D Matocq, Nick Matzke, Jenny L McGuire, Andreas Mulch, Brett R Riddle, V Louise Roth, Joshua X Samuels, Caroline A E Strömberg, Brian J Yanites
Topographically complex regions on land and in the oceans feature hotspots of biodiversity that reflect geological influences on ecological and evolutionary processes. Over geologic time, topographic diversity gradients wax and wane over millions of years, tracking tectonic or climatic history. Topographic diversity gradients from the present day and the past can result from the generation of species by vicariance or from the accumulation of species from dispersal into a region with strong environmental gradients...
March 2017: Trends in Ecology & Evolution
https://www.readbyqxmd.com/read/28190902/constraining-the-kinematics-of-metropolitan-los-angeles-faults-with-a-slip-partitioning-model
#14
S Daout, S Barbot, G Peltzer, M-P Doin, Z Liu, R Jolivet
Due to the limited resolution at depth of geodetic and other geophysical data, the geometry and the loading rate of the ramp-décollement faults below the metropolitan Los Angeles are poorly understood. Here we complement these data by assuming conservation of motion across the Big Bend of the San Andreas Fault. Using a Bayesian approach, we constrain the geometry of the ramp-décollement system from the Mojave block to Los Angeles and propose a partitioning of the convergence with 25.5 ± 0.5 mm/yr and 3...
November 16, 2016: Geophysical Research Letters
https://www.readbyqxmd.com/read/28182640/compression-extension-transition-of-continental-crust-in-a-subduction-zone-a-parametric-numerical-modeling-study-with-implications-on-mesozoic-cenozoic-tectonic-evolution-of-the-cathaysia-block
#15
Xuran Zuo, Lung Sang Chan, Jian-Feng Gao
The Cathaysia Block is located in southeastern part of South China, which situates in the west Pacific subduction zone. It is thought to have undergone a compression-extension transition of the continental crust during Mesozoic-Cenozoic during the subduction of Pacific Plate beneath Eurasia-Pacific Plate, resulting in extensive magmatism, extensional basins and reactivation of fault systems. Although some mechanisms such as the trench roll-back have been generally proposed for the compression-extension transition, the timing and progress of the transition under a convergence setting remain ambiguous due to lack of suitable geological records and overprinting by later tectonic events...
2017: PloS One
https://www.readbyqxmd.com/read/28177230/synthesis-crystal-structures-and-magnetic-properties-of-two-novel-cyanido-bridged-heterotrimetallic-cu-ii-mn-ii-cr-iii-complexes
#16
Maria-Gabriela Alexandru, Diana Visinescu, Sergiu Shova, Marius Andruh, Francesc Lloret, Miguel Julve
The self-assembly process between the heteroleptic [Cr(III)(phen)(CN)4](-) and [Cr(III)(ampy)(CN)4](-) metalloligands and the heterobimetallic {Cu(II)(valpn)Mn(II)}(2+) tecton afforded two heterotrimetallic complexes of formula [{Cu(II)(valpn)Mn(II)(μ-NC)2Cr(III)(phen)(CN)2}2{(μ-NC)Cr(III)(phen)(CN)3}2]·2CH3CN (1) and {[Cu(II)(valpn)Mn(II)(μ-NC)2Cr(III)(ampy)(CN)2]2·2CH3CN}n (2) [phen = 1,10-phenanthroline, ampy = 2-aminomethylpyridine, and H2valpn = 1,3-propanedyilbis(2-iminomethylene-6-methoxyphenol)]...
February 20, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28148950/atmospheric-oxygen-regulation-at-low-proterozoic-levels-by-incomplete-oxidative-weathering-of-sedimentary-organic-carbon
#17
Stuart J Daines, Benjamin J W Mills, Timothy M Lenton
It is unclear why atmospheric oxygen remained trapped at low levels for more than 1.5 billion years following the Paleoproterozoic Great Oxidation Event. Here, we use models for erosion, weathering and biogeochemical cycling to show that this can be explained by the tectonic recycling of previously accumulated sedimentary organic carbon, combined with the oxygen sensitivity of oxidative weathering. Our results indicate a strong negative feedback regime when atmospheric oxygen concentration is of order pO2∼0...
February 2, 2017: Nature Communications
https://www.readbyqxmd.com/read/28134755/combining-champ-and-swarm-satellite-data-to-invert-the-lithospheric-magnetic-field-in-the-tibetan-plateau
#18
Yaodong Qiu, Zhengtao Wang, Weiping Jiang, Bingbing Zhang, Fupeng Li, Fei Guo
CHAMP and Swarm satellite magnetic data are combined to establish the lithospheric magnetic field over the Tibetan Plateau at satellite altitude by using zonal revised spherical cap harmonic analysis (R-SCHA). These data are integrated with geological structures data to analyze the relationship between magnetic anomaly signals and large-scale geological tectonic over the Tibetan Plateau and to explore the active tectonic region based on the angle of the magnetic anomaly. Results show that the model fitting error is small for a layer 250-500 km high, and the RMSE of the horizontal and radial geomagnetic components is better than 0...
January 26, 2017: Sensors
https://www.readbyqxmd.com/read/28131677/a-randomized-clinical-trial-to-evaluate-the-usefulness-of-amniotic-membrane-transplantation-in-bacterial-keratitis-healing
#19
Seyed Ali Tabatabaei, Mohammad Soleimani, Mahmoud Jabbarvand Behrouz, Ali Torkashvand, Pasha Anvari, Mehdi Yaseri
PURPOSE: To determine whether early amniotic membrane transplantation improves the outcomes among patients with bacterial keratitis. PATIENTS AND METHODS: In this prospective randomized clinical trial 49 eyes from 49 patients with bacterial keratitis received routine antibiotic therapy followed by double-layer amniotic membrane transplantation during 2-5 days after start up of the medications and the second group of 50 eyes from 50 patients only received routine antibacterial therapy...
January 25, 2017: Ocular Surface
https://www.readbyqxmd.com/read/28123172/knockdown-of-tctn1-strongly-decreases-growth-of-human-colon-cancer-cells
#20
Xiaoyu Dai, Mingjun Dong, Hua Yu, Yangyang Xie, Yongming Yu, Yisheng Cao, Zhenfang Kong, Baofeng Zhou, Yidong Xu, Tong Yang, Keqiang Li
BACKGROUND Tectonic family member 1 (TCTN1), a member of the tectonic family, is involved in several developmental processes and is aberrantly expressed in multiple solid tumors. However, the expression and regulation of TCTN1 in human colorectal cancer (CRC) is still not clear. MATERIAL AND METHODS The expression of TCTN1 mRNA was first explored by using Oncomine microarray datasets. TCTN1 expression was silenced in human CRC cell lines HCT116 and SW1116 via RNA interference (RNAi). Furthermore, we investigated the effect of TCTN1 depletion on CRC cell growth by MTT, colony formation, and flow cytometry in vitro...
January 26, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
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