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https://www.readbyqxmd.com/read/29381808/pre-drill-groundwater-geochemistry-in-the-karoo-basin-south-africa
#1
Jennifer S Harkness, Kelley Swana, William K Eymold, Jodie Miller, Ricky Murray, Siep Talma, Colin J Whyte, Myles T Moore, Erica L Maletic, Avner Vengosh, Thomas H Darrah
Enhanced production of unconventional hydrocarbons in the United States has driven interest in natural gas development globally, but simultaneously raised concerns regarding water quantity and quality impacts associated with hydrocarbon extraction. We conducted a pre-development assessment of groundwater geochemistry in the critically water-restricted Karoo Basin, South Africa. Twenty-two springs and groundwater samples were analyzed for major dissolved ions, trace elements, water stable isotopes, strontium and boron isotopes, hydrocarbons and helium composition...
January 30, 2018: Ground Water
https://www.readbyqxmd.com/read/29377755/quality-of-life-outcomes-for-cabozantinib-versus-everolimus-in-patients-with-metastatic-renal-cell-carcinoma-meteor-phase-iii-randomized-trial
#2
David Cella, Bernard Escudier, Nizar M Tannir, Thomas Powles, Frede Donskov, Katriina Peltola, Manuela Schmidinger, Daniel Y C Heng, Paul N Mainwaring, Hans J Hammers, Jae Lyun Lee, Bruce J Roth, Florence Marteau, Paul Williams, John Baer, Milan Mangeshkar, Christian Scheffold, Thomas E Hutson, Sumanta Pal, Robert J Motzer, Toni K Choueiri
Purpose In the phase III METEOR trial ( ClinicalTrials.gov identifier: NCT01865747), 658 previously treated patients with advanced renal cell carcinoma were randomly assigned 1:1 to receive cabozantinib or everolimus. The cabozantinib arm had improved progression-free survival, overall survival, and objective response rate compared with everolimus. Changes in quality of life (QoL), an exploratory end point, are reported here. Patients and Methods Patients completed the 19-item Functional Assessment of Cancer Therapy-Kidney Symptom Index (FKSI-19) and the five-level EuroQol (EQ-5D-5L) questionnaires at baseline and throughout the study...
January 29, 2018: Journal of Clinical Oncology: Official Journal of the American Society of Clinical Oncology
https://www.readbyqxmd.com/read/29340852/a-geochemical-view-into-continental-palaeotemperatures-of-the-end-permian-using-oxygen-and-hydrogen-isotope-composition-of-secondary-silica-in-chert-rubble-breccia-kaibab-formation-grand-canyon-usa
#3
Ray Kenny
The upper carbonate member of the Kaibab Formation in northern Arizona (USA) was subaerially exposed during the end Permian and contains fractured and zoned chert rubble lag deposits typical of karst topography. The karst chert rubble has secondary (authigenic) silica precipitates suitable for estimating continental weathering temperatures during the end Permian karst event. New oxygen and hydrogen isotope ratios of secondary silica precipitates in the residual rubble breccia: (1) yield continental palaeotemperature estimates between 17 and 22 °C; and, (2) indicate that meteoric water played a role in the crystallization history of the secondary silica...
January 16, 2018: Geochemical Transactions
https://www.readbyqxmd.com/read/29304500/dual-oxygen-and-nitrogen-isotopic-characterization-of-the-museum-archived-nitrates-from-the-united-states-of-america-south-africa-and-australia
#4
Chitoshi Mizota, Takahiro Hosono, Midori Matsunaga, Azusa Okumura
Dual (oxygen and nitrogen) isotopic composition of the museum archived nitrates from the United States of America, South Africa and Australia was studied. The analyzed specimens were collected in middle 19th to early 20th centuries, and represent world-wide acquisition of the Smithsonian Institution Natural Museum of Natural History (Washington, D. C., USA) and the Natural History Museum (London, UK). The samples consist of transparent to semi-transparent aggregates of minute nitrate, euhedral crystallites which imply precipitation from percolating fluids under ample space and dry regimes...
January 2, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29289785/stable-isotopic-composition-reveals-the-spatial-and-temporal-dynamics-of-discharge-in-the-large-river-of-yarlungzangbo-in-the-tibetan-plateau
#5
Wei Ren, Tandong Yao, Shiyou Xie
Spatial and temporal variability in stable isotopic compositions (δ18O and δD) in river water of the Yarlungzangbo was investigated to identify major hydrological processes along the river channel and evaluate the isotopic response to discharge variation. The results show geographic, distinct isotopic evolutions in the Yarlungzangbo system. Along the main stem, river δ18O exhibits a decreasing trend from the headwaters to the middle reach but an increasing one from the middle to the lower reaches, and main flows demonstrate much greater δ18O-δD slope and intercept compared to the global meteoric water line (GMWL) and reported local meteoric water lines (LMWLs) for sites within the basin...
December 28, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29286294/real-time-detection-of-sporadic-meteors-in-the-intensified-tv-imaging-systems
#6
Stanislav Vítek, Maria Nasyrova
The automatic observation of the night sky through wide-angle video systems with the aim of detecting meteor and fireballs is currently among routine astronomical observations. The observation is usually done in multi-station or network mode, so it is possible to estimate the direction and the speed of the body flight. The high velocity of the meteorite flying through the atmosphere determines the important features of the camera systems, namely the high frame rate. Thanks to high frame rates, such imaging systems produce a large amount of data, of which only a small fragment has scientific potential...
December 29, 2017: Sensors
https://www.readbyqxmd.com/read/29260479/the-hydrogen-and-oxygen-isotopic-compositions-of-precipitation-in-a-forested-watershed-of-the-south-qinling-mts-china
#7
Hongmei Bu, Xianfang Song, Jun Xia
The stable isotopic compositions (δD and δ18O) of precipitation were firstly investigated from May 2012 to November 2013 in the Jinshui River basin of the South Qinling Mts., China. The local meteoric water lines (LMWLs) based on all daily and monthly precipitation-weighted data were defined as δD = 8.32 δ18O + 12.57 (r 2 = 0.957, n = 47, p < 0.001) and δD = 8.11 δ18O + 11.59 (r 2 = 0.946, n = 15, p < 0.001), respectively. The fluctuations of daily deuterium excess (d-excess) values indicated the mixing moisture sources from the monsoon circulation during the rainy season and the local moisture recycling during the dry season in the river basin...
December 19, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29245376/the-genus-i-diphasia-i-l-agassiz-1862-cnidaria-hydrozoa-in-northwest-africa
#8
Marta Gil, Fran Ramil
This paper is the result of the study of large collections of Sertulariidae Lamouroux, 1812 (Cnidaria, Hydrozoa, Hydroidolina) obtained from continental margins of Northwest Africa by several Spanish and Norwegian surveys between 2004 and 2012. Material collected from Lusitanian seamounts by the French Seamount 1 expedition and from the Great Meteor Bank by the German survey Meteor 42/3 were also examined. A total of 12 species belonging to the genus Diphasia were studied and illustrated, and four new species were described: Diphasia leonisae n...
December 12, 2017: Zootaxa
https://www.readbyqxmd.com/read/29220761/climate-change-potential-effects-on-the-hydrological-regime-of-freshwater-springs-in-the-italian-northern-apennines
#9
Federico Cervi, Francesca Petronici, Attilio Castellarin, Marco Marcaccio, Andrea Bertolini, Lisa Borgatti
In large areas of the Italian Northern Apennines, hundreds of low-yield springs provide water for drinking and industrial purposes, with short groundwater flow paths being formed within fractured sedimentary rock units. This hydrogeological setting results in spring water discharges that closely follow meteoric water recharge patterns, leading to low-flow periods concentrated in the summer/early autumn. Therefore, the springs' outflow can be very sensitive to a shortage in water recharge, as it was the case in 2003 and 2017, when a prolonged period of drought caused severe water management issues...
December 5, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29209551/synchronous-occurrence-of-primary-breast-carcinoma-and-primary-colon-adenocarcinoma
#10
Gurkan Yetkin, Fevzi Celayir, Ismail Ethem Akgun, Ramazan Ucak
A 65-year-old female patient presented to the emergency clinic with abdominal pain, meteorism, and intermittent rectal bleeding. Colonoscopy was performed, and a hepatic flexure tumor was detected. Histopathological examination of biopsy revealed adenocarcinoma. Thoracoabdominal CT was performed for staging, and a spiculated contour mass was found incidentally on the left breast. Mammography and ultrasonography were performed for the cause of these findings, and suspicious lesions of malignancy were seen in the left breast...
2017: Case Reports in Surgery
https://www.readbyqxmd.com/read/29193028/connectivity-in-a-karst-system-using-electrical-resistivity-tomography-and-network-theory
#11
Mariana Gómez-Nicolás, Mario Rebolledo-Vieyra, Efrain Canto-Lugo, Rodrigo Huerta-Quintanilla, Pablo Ochoa-Sandoval
The Ring of Cenotes (RC) is an alignment of numerous cenotes (sinkholes) in a semicircular form (with a radius of 100 km) located in northwestern Yucatán, México. The formation roughly coincides with a concentric ring that corresponds to a buried structure, which has been identified as the product of a meteor impact, known as the Chicxulub crater. Secondary permeability generated by the fracturing and faulting of the sedimentary sequence in the Chicxulub crater has favored the karstification process and therefore the development of underground rivers that transport water from the mainland to the sea...
November 29, 2017: Ground Water
https://www.readbyqxmd.com/read/29180618/a-transcribed-enhancer-dictates-mesendoderm-specification-in-pluripotency
#12
Michael Alexanian, Daniel Maric, Stephen P Jenkinson, Marco Mina, Clayton E Friedman, Ching-Chia Ting, Rudi Micheletti, Isabelle Plaisance, Mohamed Nemir, Damien Maison, Jasmin Kernen, Iole Pezzuto, Dominic Villeneuve, Frédéric Burdet, Mark Ibberson, Stephen L Leib, Nathan J Palpant, Nouria Hernandez, Samir Ounzain, Thierry Pedrazzini
Enhancers and long noncoding RNAs (lncRNAs) are key determinants of lineage specification during development. Here, we evaluate remodeling of the enhancer landscape and modulation of the lncRNA transcriptome during mesendoderm specification. We sort mesendodermal progenitors from differentiating embryonic stem cells (ESCs) according to Eomes expression, and find that enhancer usage is coordinated with mesendoderm-specific expression of key lineage-determining transcription factors. Many of these enhancers are associated with the expression of lncRNAs...
November 27, 2017: Nature Communications
https://www.readbyqxmd.com/read/29166919/similar-short-term-clinical-response-to-high-dose-versus-low-dose-methotrexate-in-monotherapy-and-combination-therapy-in-patients-with-rheumatoid-arthritis
#13
Sytske Anne Bergstra, Cornelia F Allaart, Rosaline van den Berg, Arvind Chopra, Nimmisha Govind, Tom W J Huizinga, Robert B M Landewe
BACKGROUND: Aiming at rapid decrease of disease activity, there has been a trend to start with higher doses of methotrexate (MTX) in patients newly diagnosed with rheumatoid arthritis (RA), both as monotherapy and in combination with other antirheumatic drugs. We aimed to study the relationship between clinical response and MTX dose as monotherapy or combination therapy in patients with early RA. METHODS: Disease-modifying anti-rheumatic drug (DMARD)-naive patients with early RA, from a large international observational database, the METEOR database, were selected if MTX was part of their initial treatment...
November 22, 2017: Arthritis Research & Therapy
https://www.readbyqxmd.com/read/29146618/management-of-adverse-events-associated-with-cabozantinib-therapy-in-renal-cell-carcinoma
#14
REVIEW
Manuela Schmidinger, Romano Danesi
Cabozantinib was recently approved for the treatment of advanced renal cell carcinoma (RCC) after treatment with vascular endothelial growth factor (VEGF)-targeted therapy. Cabozantinib is a multikinase inhibitor targeting VEGF receptor (VEGFR) 2, mesenchymal-epithelial transition receptor, and "anexelekto" receptor tyrosine kinase. A 60-mg daily dose led to improved overall survival and progression-free survival (PFS) versus everolimus in advanced RCC patients as a second- or later-line treatment in the METEOR trial...
November 16, 2017: Oncologist
https://www.readbyqxmd.com/read/29056765/improving-photometric-calibration-of-meteor-video-camera-systems
#15
Steven Ehlert, Aaron Kingery, Robert Suggs
We present the results of new calibration tests performed by the NASA Meteoroid Environment Office (MEO) designed to help quantify and minimize systematic uncertainties in meteor photometry from video camera observations. These systematic uncertainties can be categorized by two main sources: an imperfect understanding of the linearity correction for the MEO's Watec 902H2 Ultimate video cameras and uncertainties in meteor magnitudes arising from transformations between the Watec camera's Sony EX-View HAD bandpass and the bandpasses used to determine reference star magnitudes...
September 1, 2017: Planetary and Space Science
https://www.readbyqxmd.com/read/29056366/natural-modulators-of-nonalcoholic-fatty-liver-disease-mode-of-action-analysis-and-in-silico-adme-tox-prediction
#16
Merilin Al Sharif, Petko Alov, Vessela Vitcheva, Antonia Diukendjieva, Mattia Mori, Bruno Botta, Ivanka Tsakovska, Ilza Pajeva
Nonalcoholic fatty liver disease (NAFLD) is considered to be the most common chronic liver disease. The discovery of natural product-based NAFLD modulators requires a more comprehensive study of their modes of action (MoAs). In this study we analysed available in the literature data for 26 naturally-derived compounds associated with experimental evidence for NAFLD alleviation and outlined potential biomolecular targets and a network of pharmacological MoAs for 12 compounds with the highest number of experimentally supported MoA key events, modulated by them...
December 15, 2017: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/29044494/influence-of-seasonal-pumping-on-groundwater-sources-and-flow-system-nagaoka-plain-japan
#17
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
#18
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
#19
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
#20
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
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