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https://www.readbyqxmd.com/read/29044494/influence-of-seasonal-pumping-on-groundwater-sources-and-flow-system-nagaoka-plain-japan
#1
Hiroaki Abe, Changyuan Tang, Nozomu Takeuchi, Akihiko Kondoh
Intensive groundwater development in the urban area of the Nagaoka Plain, Japan, has induced changes in the pH and saturation index of calcite in groundwater. To account for these chemical changes, it is important to determine seasonal variations of recharge and the groundwater flow system in the aquifer. This study identified the sources and flow system of groundwater in this urban area by a comprehensive method using stable isotope data and a numerical groundwater model of the Nagaoka Plain. Stable isotope evidence shows that the groundwater is recharged by meteoric water originating from low-elevation areas rather than the mountains surrounding the plain...
October 17, 2017: Ground Water
https://www.readbyqxmd.com/read/28989231/controls-on-the-distribution-of-fluorescent-dissolved-organic-matter-during-an-under-ice-algal-bloom-in-the-western-arctic-ocean
#2
Wilson G Mendoza, Elliot L Weiss, Brian Schieber, B Greg Mitchell
In this study we used fluorescence excitation and emission matrix spectroscopy, hydrographic data, and a self-organizing map (SOM) analysis to assess the spatial distribution of labile and refractory fluorescent dissolved organic matter (FDOM) for the Chukchi and Beaufort Seas at the time of a massive under-ice phytoplankton bloom during early summer 2011. Biogeochemical properties were assessed through decomposition of water property classes and sample classification that employed a SOM neural network-based analysis which classified 10 clusters from 269 samples and 17 variables...
July 2017: Global Biogeochemical Cycles
https://www.readbyqxmd.com/read/28974945/spatial-autocorrelation-source-water-and-the-distribution-of-total-and-viable-microbial-abundances-within-a-crystalline-formation-to-a-depth-of-800-m
#3
E D Beaton, Marilyne Stuart, Sim Stroes-Gascoyne, Karen J King-Sharp, Ioana Gurban, Amy Festarini, Hui Q Chen
Proposed radioactive waste repositories require long residence times within deep geological settings for which we have little knowledge of local or regional subsurface dynamics that could affect the transport of hazardous species over the period of radioactive decay. Given the role of microbial processes on element speciation and transport, knowledge and understanding of local microbial ecology within geological formations being considered as host formations can aid predictions for long term safety. In this relatively unexplored environment, sampling opportunities are few and opportunistic...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28959798/reaction-kinetics-of-caoh-with-h-and-o2-and-o2caoh-with-o-implications-for-the-atmospheric-chemistry-of-meteoric-calcium
#4
Juan Carlos Gomez Martin, John M C Plane
The ablation of cosmic dust particles entering the Earth's upper atmosphere produces a layer of Ca atoms around 90 km. Here, we present a set of kinetic experiments designed to understand the nature of the Ca molecular reservoirs on the underside of the layer. CaOH was produced by laser ablation of a Ca target in the fast flow tube and detected by non-resonant laser-induced fluorescence, probing the D((2)Σ(+)) ← X((2)Σ(1)) transition at 346.9 nm. The following rate constants were measured (at 298 K): k(CaOH + H → Ca + H2O) = (1...
September 21, 2017: ACS earth & space chemistry
https://www.readbyqxmd.com/read/28915768/isotopic-composition-of-bottled-water-in-saudi-arabia
#5
Watheq Al-Basheer, AbdulAziz Al-Jalal, Khaled Gasmi
The (18)O/(16)O and (2)H/(1)H ratios of 18 water brands representing the most popular bottled water brands in the Saudi market were measured using a system based on the latest advancements in tunable off-axis integrated cavity output diode laser spectroscopy (OA-ICOS) in the near-infrared spectral region. Utilizing δ(18)O and the δ(2)H values of locally produced water samples, a meteoric water line (δ(2)H = 7.84 δ(18)O + 2.11) was extracted and found to be consistent with the slope of the global meteoric water line (GMWL) and the geographic location of Saudi Arabia...
September 15, 2017: Isotopes in Environmental and Health Studies
https://www.readbyqxmd.com/read/28910852/origin-and-evolution-of-aquitard-porewater-in-the-western-coastal-plain-of-bohai-bay-china
#6
Jing Li, Xing Liang, Menggui Jin, Jilong Yang, Bin Ma, Qin Ge
High-salinity paleowater from low-permeability aquitards in coastal areas can be a major threat to groundwater resources; however, such water has rarely been studied. The chemical and isotopic compositions of porewater extracted from a 200-m-thick Quaternary sedimentary sequence in the western coastal plain of Bohai Bay, China, were analyzed to investigate the salinity origin and chemical evolution of porewater in aquitards. Porewater samples derived at depths shallower than 32 m are characterized by Cl-Na type saline water (total dissolved solids [TDS], 10...
September 14, 2017: Ground Water
https://www.readbyqxmd.com/read/28905838/retinal-meteor
#7
Ramesh Venkatesh, Prachi Gurav, Prachi Abhishek Dave, Sankhadeep Roy
We describe a case of a 65-year old man diagnosed with retinal vasoproliferative tumour secondary to posterior uveitis. The fluorescein angiography shows an interesting meteor-like leak emanating from the tumour and rising towards the superior retina in the later frames of the angiogram. Pictorially, we call it the "Retinal Meteor" and also describe the possible mechanism for this pattern of leakage.
September 2017: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/28905125/biometeorological-forecasts-for-health-surveillance-and-prevention-of-meteor-tropic-effects
#8
Luis B Lecha Estela
An early method of biometeorological forecasts was developed for Cuba during the late 90s. It was based on the relationship between the daily occurrence of massive health crisis and the magnitude of the 24-h differences of partial density of oxygen in the air (PODA index). Ten years later, applying new technological facilities, a new model was developed in order to offer operational biometeorological forecast to Cuban health institutions. After a satisfactory validation process, the official bioforecast service to health institutions in Villa Clara province began on February of 2012...
September 13, 2017: International Journal of Biometeorology
https://www.readbyqxmd.com/read/28821797/detecting-hybridization-between-sister-species-of-terebratulina-brachiopoda-cancellothyridoidea-in-the-north-atlantic-morphology-versus-molecules
#9
Carsten Lüter, Nina A Ebeling, Martin Aberhan
Investigating samples of the cancellothyridid brachiopod Terebratulina collected during the IceAGE (Me85/3) expedition of RV METEOR at the continental shelf around Iceland with both morphometrical and molecular methods, we were for the first time able to detect a hybridization event between brachiopod sister species, which are thought to have separated 60 MYA. Terebratulina retusa and T. septentrionalis can clearly be distinguished on the basis of consistent species-specific molecular signatures in both mitochondrial and nuclear markers, whereas morphometrical analyses proved to be less reliable for species determination than previously thought...
August 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28814716/lithium-enrichment-in-intracontinental-rhyolite-magmas-leads-to-li-deposits-in-caldera-basins
#10
Thomas R Benson, Matthew A Coble, James J Rytuba, Gail A Mahood
The omnipresence of lithium-ion batteries in mobile electronics, and hybrid and electric vehicles necessitates discovery of new lithium resources to meet rising demand and to diversify the global lithium supply chain. Here we demonstrate that lake sediments preserved within intracontinental rhyolitic calderas formed on eruption and weathering of lithium-enriched magmas have the potential to host large lithium clay deposits. We compare lithium concentrations of magmas formed in a variety of tectonic settings using in situ trace-element measurements of quartz-hosted melt inclusions to demonstrate that moderate to extreme lithium enrichment occurs in magmas that incorporate felsic continental crust...
August 16, 2017: Nature Communications
https://www.readbyqxmd.com/read/28730358/hydrogeochemical-characterization-and-groundwater-quality-assessment-in-intruded-coastal-brine-aquifers-laizhou-bay-china
#11
Xiaoying Zhang, Jinjie Miao, Bill X Hu, Hongwei Liu, Hanxiong Zhang, Zhen Ma
The aquifer in the coastal area of the Laizhou Bay is affected by salinization processes related to intense groundwater exploitation for brine resource and for agriculture irrigation during the last three decades. As a result, the dynamic balances among freshwater, brine, and seawater have been disturbed and the quality of groundwater has deteriorated. To fully understand the groundwater chemical distribution and evolution in the regional aquifers, hydrogeochemical and isotopic studies have been conducted based on the water samples from 102 observation wells...
July 20, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28715910/isotopic-fingerprints-of-the-lake-%C3%A5-abi%C3%A5-skie-ne-poland-hydrological-system-on-contemporary-carbonates-precipitated-in-the-lake
#12
Alicja Ustrzycka, Natalia Piotrowska, Alicja Bonk, Janusz Filipiak, Wojciech Tylmann
An isotopic monitoring was undertaken in 2012-2014 at Lake Żabińskie (Mazurian Lakeland, NE Poland). The aim was to identify the factors and processes controlling an isotopic composition of the lake water and to explore the mechanism responsible for recording the climatic signal in stable isotope composition of deposited carbonates. δ(18)O and δ(2)H in the precipitation, lake water column, inflows and outflow, δ(18)O and δ(13)C in the carbonate fraction of sediments trapped in the water column were recorded with monthly resolution...
July 17, 2017: Isotopes in Environmental and Health Studies
https://www.readbyqxmd.com/read/28709093/evolutionary-process-of-saline-water-intrusion-in-holocene-and-late-pleistocene-groundwater-in-southern-laizhou-bay
#13
Sen Liu, Zhonghua Tang, Maosheng Gao, Guohua Hou
Saline water intrusion is one of the most serious groundwater problems in southern Laizhou Bay. In this study, formation of groundwater with different qualities and saline water intrusion were analyzed using hydrochemical and stable isotopic methods, and the Hydrochemical Facies Evolution Diagram (HFE-Diagram). The results demonstrate that the structure of the sedimentary layer in this area is the dominant controlling factor of groundwater distribution. From the south (land) to the north (sea), the hydrochemical distribution presents a regular changing pattern following the order: HCO3-Na·Mg and HCO3·Cl-Mg·Ca (fresh water), HCO3·Cl-Na·Mg (brackish water), Cl-Na·Mg (saline water), Cl-Na (saline water) and Cl·HCO3-Na (brackish water)...
December 31, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28702708/microbial-composition-and-diversity-patterns-in-deep-hyperthermal-aquifers-from-the-western-plain-of-romania
#14
Cecilia M Chiriac, Andreea Baricz, Edina Szekeres, Knut Rudi, Nicolae Dragoș, Cristian Coman
A limited number of studies have investigated the biodiversity in deep continental hyperthermal aquifers and its influencing factors. Here, we present the first description of microbial communities inhabiting the Pannonian and Triassic hyperthermal aquifers from the Western Plain of Romania, the first one being considered a deposit of "fossilized waters," while the latter is embedded in the hydrological cycle due to natural refilling. The 11 investigated drillings have an open interval between 952 and 3432 m below the surface, with collected water temperatures ranging between 47 and 104 °C, these being the first microbial communities characterized in deep continental water deposits with outflow temperatures exceeding 80 °C...
July 13, 2017: Microbial Ecology
https://www.readbyqxmd.com/read/28697268/the-cost-of-hospital-admission-brief-resolved-unexplained-events
#15
Justin Triemstra
The modern health care system continues to expand at a meteoric rate with ever-increasing technological advancements. However, with these advancements come unsustainably rising costs and occasionally unintended, avoidable harm. In this article, we use a brief resolved unexplained event (BRUE) to illustrate how recent guidelines can help physicians practice value in this modern health care system. A BRUE is a common pediatric problem that is seen in ambulatory and emergency department settings. Infants presenting with a BRUE can be separated into low- and high-risk groups per recent guidelines...
July 1, 2017: Pediatric Annals
https://www.readbyqxmd.com/read/28692884/effects-of-hydrated-lime-on-radionuclides-stabilization-of-hanford-tank-residual-waste
#16
Guohui Wang, Wooyong Um, Kirk J Cantrell, Michelle M V Snyder, Mark E Bowden, Mark B Triplett, Edgar C Buck
Chemical stabilization of tank residual waste is part of a Hanford Site tank closure strategy to reduce overall risk levels to human health and the environment. In this study, a set of column leaching experiments using tank C-104 residual waste were conducted to evaluate the leachability of uranium (U) and technetium (Tc) where grout and hydrated lime were applied as chemical stabilizing agents. The experiments were designed to simulate future scenarios where meteoric water infiltrates through the vadose zones into the interior of the tank filled with layers of grout or hydrated lime, and then contacts the residual waste...
October 2017: Chemosphere
https://www.readbyqxmd.com/read/28691511/defining-a-stable-water-isotope-framework-for-isotope-hydrology-application-in-a-large-trans-boundary-watershed-russian-federation-ukraine
#17
Yuliya Vystavna, Dmytro Diadin, Frédéric Huneau
Stable isotopes of hydrogen ((2)H) and oxygen ((18)O) of the water molecule were used to assess the relationship between precipitation, surface water and groundwater in a large Russia/Ukraine trans-boundary river basin. Precipitation was sampled from November 2013 to February 2015, and surface water and groundwater were sampled during high and low flow in 2014. A local meteoric water line was defined for the Ukrainian part of the basin. The isotopic seasonality in precipitation was evident with depletion in heavy isotopes in November-March and an enrichment in April-October, indicating continental and temperature effects...
July 10, 2017: Isotopes in Environmental and Health Studies
https://www.readbyqxmd.com/read/28640462/hybrid-lead-halide-perovskites-for-ultrasensitive-photoactive-switching-in-terahertz-metamaterial-devices
#18
Manukumara Manjappa, Yogesh Kumar Srivastava, Ankur Solanki, Abhishek Kumar, Tze Chien Sum, Ranjan Singh
The recent meteoric rise in the field of photovoltaics with the discovery of highly efficient solar-cell devices is inspired by solution-processed organic-inorganic lead halide perovskites that exhibit unprecedented light-to-electricity conversion efficiencies. The stunning performance of perovskites is attributed to their strong photoresponsive properties that are thoroughly utilized in designing excellent perovskite solar cells, light-emitting diodes, infrared lasers, and ultrafast photodetectors. However, optoelectronic application of halide perovskites in realizing highly efficient subwavelength photonic devices has remained a challenge...
August 2017: Advanced Materials
https://www.readbyqxmd.com/read/28633552/cabozantinib-for-the-treatment-of-kidney-cancer
#19
REVIEW
Ahmed Abdelaziz, Ulka Vaishampayan
Cabozantinib is a small molecule tyrosine kinase inhibitor that initially showed activity in medullary thyroid cancer and was recently approved by the Food and Drug Administration for the treatment of metastatic renal cell carcinoma after progression on first line therapy. Areas covered: In the METEOR trial, cabozantinib demonstrated significantly improved efficacy in all three endpoints; response rates, progression free survival and overall survival in a randomized trial with everolimus as an active comparator...
July 2017: Expert Review of Anticancer Therapy
https://www.readbyqxmd.com/read/28631760/-astronauts-asteroids-and-the-universe-of-antithrombotic-therapies-in-primary-percutaneous-coronary-intervention
#20
Leonardo De Luca, Antonino Granatelli
A sensation of self-awareness on the relativity of our certainties comes over looking to the huge amount of data on antithrombotic therapies assessed in patients with ST-elevation myocardial infarction (STEMI) undergoing primary percutaneous coronary intervention (pPCI). This sensation can be compared to the so-called "overview effect", a cognitive shift in awareness reported by some astronauts during spaceflight, often while viewing the Earth from orbit. In this review we will mention drugs floated like meteors in the Universe of STEMI treatment and we will discuss the body of evidence on oral and intravenous antithrombotic therapies for patients undergoing pPCI...
June 2017: Giornale Italiano di Cardiologia
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