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https://www.readbyqxmd.com/read/28614522/ocean-outfalls-as-an-alternative-to-minimizing-risks-to-human-and-environmental-health
#1
Renato Castiglia Feitosa
Submarine outfalls are proposed as an efficient alternative for the final destination of wastewater in densely populated coastal areas, due to the high dispersal capacity and the clearance of organic matter in the marine environment, and because they require small areas for implementation. This paper evaluates the probability of unsuitable bathing conditions in coastal areas nearby to the Ipanema, Barra da Tijuca and Icaraí outfalls based on a computational methodology gathering hydrodynamic, pollutant transport, and bacterial decay modelling...
June 2017: Ciência & Saúde Coletiva
https://www.readbyqxmd.com/read/28604012/optimizing-the-balance-between-task-automation-and-human-manual-control-in-simulated-submarine-track-management
#2
Stephanie I Chen, Troy A W Visser, Samuel Huf, Shayne Loft
Automation can improve operator performance and reduce workload, but can also degrade operator situation awareness (SA) and the ability to regain manual control. In 3 experiments, we examined the extent to which automation could be designed to benefit performance while ensuring that individuals maintained SA and could regain manual control. Participants completed a simulated submarine track management task under varying task load. The automation was designed to facilitate information acquisition and analysis, but did not make task decisions...
June 12, 2017: Journal of Experimental Psychology. Applied
https://www.readbyqxmd.com/read/28589212/erratum-to-a-new-deep-sea-suctorian-nematode-epibiosis-loricophrya-tricoma-from-the-blanes-submarine-canyon-nw-mediterranean
#3
Gregorio Fernandez-Leborans, Sara Román, Daniel Martin
No abstract text is available yet for this article.
June 6, 2017: Microbial Ecology
https://www.readbyqxmd.com/read/28557992/seasonal-monitoring-of-deep-sea-megabenthos-in-barkley-canyon-cold-seep-by-internet-operated-vehicle-iov
#4
Carolina Doya, Damianos Chatzievangelou, Nixon Bahamon, Autun Purser, Fabio C De Leo, S Kim Juniper, Laurenz Thomsen, Jacopo Aguzzi
Knowledge of the processes shaping deep-sea benthic communities at seasonal scales in cold-seep environments is incomplete. Cold seeps within highly dynamic regions, such as submarine canyons, where variable current regimes may occur, are particularly understudied. Novel Internet Operated Vehicles (IOVs), such as tracked crawlers, provide new techniques for investigating these ecosystems over prolonged periods. In this study a benthic crawler connected to the NEPTUNE cabled infrastructure operated by Ocean Networks Canada was used to monitor community changes across 60 m2 of a cold-seep area of the Barkley Canyon, North East Pacific, at ~890 m depth within an Oxygen Minimum Zone (OMZ)...
2017: PloS One
https://www.readbyqxmd.com/read/28550634/long-term-dispersion-and-availability-of-metals-from-submarine-mine-tailing-disposal-in-a-fjord-in-arctic-norway
#5
Kristine B Pedersen, Pernille E Jensen, Beata Sternal, Lisbeth M Ottosen, Mie Vesterskov Henning, Manja Marie Kudahl, Juho Junttila, Kari Skirbekk, Marianne Frantzen
Mining of Cu took place in Kvalsund in the Arctic part of Norway in the 1970s, and mine tailings were discharged to the inner part of the fjord, Repparfjorden. Metal speciation analysis was used to assess the historical dispersion of metals as well as their potential bioavailability from the area of the mine tailing disposal. It was revealed that the dispersion of Ba, Cr, Ni, Pb and Zn from the mine tailings has been limited. Dispersion of Cu to the outer fjord has, however, occurred; the amounts released and dispersed from the mine tailing disposal area quantified to be 2...
May 27, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28543437/the-adenoid-its-history-and-a-cautionary-tale
#6
Robert J Ruben
The existence of the adenoid first appears to have been noted by Conrad Victor Schneider in 1661. James Yearsley reported in 1842 one case in which he improved hearing by removal of a mucus membrane from behind the uvula, which indicates some appreciation of a relationship of the nasopharynx to ear disease. Hans Wilhelm Meyer, in 1868, was the first to demonstrate the relationship of the adenoid to ear disease and to develop an effective, although somewhat difficult, surgical operation to remove the adenoid...
June 2017: Laryngoscope
https://www.readbyqxmd.com/read/28534807/lobophorin-k-a-new-natural-product-with-cytotoxic-activity-produced-by-streptomyces-sp-m-207-associated-with-the-deep-sea-coral-lophelia-pertusa
#7
Alfredo F Braña, Aida Sarmiento-Vizcaíno, Miguel Osset, Ignacio Pérez-Victoria, Jesús Martín, Nuria de Pedro, Mercedes de la Cruz, Caridad Díaz, Francisca Vicente, Fernando Reyes, Luis A García, Gloria Blanco
The present article describes the isolation of a new natural product of the lobophorin family, designated as lobophorin K (1), from cultures of the marine actinobacteria Streptomyces sp. M-207, previously isolated from the cold-water coral Lophelia pertusa collected at 1800 m depth during an expedition to the submarine Avilés Canyon. Its structure was determined using a combination of spectroscopic techniques, mainly ESI-TOF MS and 1D and 2D NMR. This new natural product displayed cytotoxic activity against two human tumor cell lines, such as pancreatic carcinoma (MiaPaca-2) and breast adenocarcinoma (MCF-7)...
May 19, 2017: Marine Drugs
https://www.readbyqxmd.com/read/28518001/propranolol-effects-on-decompression-sickness-in-a-simulated-dissub-rescue-in-swine
#8
Angela S Forbes, David P Regis, Aaron A Hall, Richard T Mahon, William A Cronin
INTRODUCTION: Disabled submarine (DISSUB) survivors may face elevated CO2 levels and inert gas saturation, putting them at risk for CO2 toxicity and decompression sickness (DCS). Propranolol was shown to reduce CO2 production in an experimental DISSUB model in humans but its effects on DCS in a DISSUB rescue scenario are unknown. A 100% oxygen prebreathe (OPB) reduces DCS incidence and severity and is incorporated into some DISSUB rescue protocols. We used a swine model of DISSUB rescue to study the effect of propranolol on DCS incidence and mortality with and without an OPB...
April 1, 2017: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/28504256/explosive-eruption-flank-collapse-and-megatsunami-at-tenerife-ca-170-ka
#9
Raphaël Paris, Juan J Coello Bravo, María E Martín González, Karim Kelfoun, François Nauret
Giant mass failures of oceanic shield volcanoes that generate tsunamis potentially represent a high-magnitude but low-frequency hazard, and it is actually difficult to infer the mechanisms and dynamics controlling them. Here we document tsunami deposits at high elevation (up to 132 m) on the north-western slopes of Tenerife, Canary Islands, as a new evidence of megatsunami generated by volcano flank failure. Analyses of the tsunami deposits demonstrate that two main tsunamis impacted the coasts of Tenerife 170 kyr ago...
May 15, 2017: Nature Communications
https://www.readbyqxmd.com/read/28502452/the-impact-of-submarine-copper-mine-tailing-disposal-from-the-1970s-on-repparfjorden-northern-norway
#10
Beata Sternal, Juho Junttila, Kari Skirbekk, Matthias Forwick, JoLynn Carroll, Kristine Bondo Pedersen
We investigate the state of sedimentological environment and contaminant status of Repparfjorden (N Norway) impacted by submarine disposal of mine tailings during the 1970s using sedimentological and geochemical properties of seventeen sediment cores. The impact of tailings disposal is mainly restricted to the inner fjord where the discharge occurred. Sediment cores retrieved from the inner fjord contain layers of mine tailings up to 9-cm thick, 3-9cm below the seafloor. Spreading of the tailing-related metal Cu and particles is limited to the inner fjord and to a 2cm layer in one core from the outer fjord...
May 10, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28501769/dietary-exposure-assessment-for-arsenic-and-mercury-following-submarine-tailings-placement-in-ratatotok-sub-district-north-sulawesi-indonesia
#11
Keith Bentley, Amin Soebandrio
The Mesel gold mine in the Ratatotok Sub-district operated between 1996 and 2004 with tailings disposal via an engineered submarine tailings placement (STP) into Buyat Bay. This operation raised concerns of increased levels of arsenic (As) and mercury (Hg) associated disease in the local communities from consumption of seafood contaminated with anthropogenic As and Hg. This report uses the dietary exposure to As and Hg, from local fishermen and market-purchased Codex "as consumed" and environmental fish results from the pre-mining baseline (1990-1995), the mine operational (1996-2004) and post-closure monitoring (2007-2016) to examine the potential health effects...
August 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28484339/statistical-emulation-of-landslide-induced-tsunamis-at-the-rockall-bank-ne-atlantic
#12
D M Salmanidou, S Guillas, A Georgiopoulou, F Dias
Statistical methods constitute a useful approach to understand and quantify the uncertainty that governs complex tsunami mechanisms. Numerical experiments may often have a high computational cost. This forms a limiting factor for performing uncertainty and sensitivity analyses, where numerous simulations are required. Statistical emulators, as surrogates of these simulators, can provide predictions of the physical process in a much faster and computationally inexpensive way. They can form a prominent solution to explore thousands of scenarios that would be otherwise numerically expensive and difficult to achieve...
April 2017: Proceedings. Mathematical, Physical, and Engineering Sciences
https://www.readbyqxmd.com/read/28479145/arsenic-and-mercury-concentrations-in-marine-fish-sourced-from-local-fishermen-and-fish-markets-in-mine-impacted-communities-in-ratatotok-sub-district-north-sulawesi-indonesia
#13
Keith Bentley, Amin Soebandrio
Mesel gold mine, Ratatotok Sub-district, North Sulawesi, Indonesia deposited about 4.5millionm(3) of detoxified tailings containing arsenic (As) and mercury (Hg) via a submarine pipeline into Buyat Bay. As and Hg analysis of 216 fish muscle tissue composites from subsistence fishermen, local markets and a reference market confirmed that mean As levels were comparable between locations (range 1.71 to 2.12mg/kg wet weight (ww)) and <10% of the Australia New Zealand standard. Mean Hg concentrations were highest for the artisanal fishermen group (0...
May 4, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28426983/constraining-the-temporal-variations-of-ra-isotopes-and-rn-in-the-groundwater-end-member-implications-for-derived-sgd-estimates
#14
Marc Cerdà-Domènech, Valentí Rodellas, Albert Folch, Jordi Garcia-Orellana
Submarine groundwater discharge (SGD) has been recognized as an important supplier of chemical compounds to the ocean that may influence coastal geochemical cycles. Radium isotopes ((223)Ra, (224)Ra, (226)Ra,(228)Ra) and radon ((222)Rn) have been widely applied as tracers of SGD. Their application requires the appropriate characterization of both the concentrations of tracers in the discharging groundwater and their distribution in the coastal water column. This study evaluates the temporal evolution of Ra isotopes and (222)Rn concentrations in a dynamic subterranean estuary of a microtidal Mediterranean coastal aquifer that experiences large displacements of the fresh-saltwater interface as a necessary initial step in evaluating the influence of SGD in coastal waters...
October 1, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28406193/breathing-modes-of-kolumbo-submarine-volcano-santorini-greece
#15
Evangelos Bakalis, Theo J Mertzimekis, Paraskevi Nomikou, Francesco Zerbetto
Submarine volcanoes, such as Kolumbo (Santorini, Greece) are natural laboratories for fostering multidisciplinary studies. Their investigation requires the most innovative marine technology together with advanced data analysis. Conductivity and temperature of seawater were recorded directly above Kolumbo's hydrothermal vent system. The respective time series have been analyzed in terms of non-equilibrium techniques. The energy dissipation of the volcanic activity is monitored by the temperature variations of seawater...
April 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28402339/rapid-crystallization-during-recycling-of-basaltic-andesite-tephra-timescales-determined-by-reheating-experiments
#16
Nicholas Deardorff, Katharine Cashman
Microcrystalline inclusions within microlite-poor matrix are surprisingly common in low intensity eruptions around the world, yet their origin is poorly understood. Inclusions are commonly interpreted as evidence of crystallization along conduit margins. Alternatively, these clasts may be recycled from low level eruptions where they recrystallize by heating within the vent. We conducted a series of experiments heating basaltic andesite lapilli from temperatures below the glass transition (~690 °C) to above inferred eruption temperatures (>1150 °C) for durations of 2 to >60 minutes...
April 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28383164/ferrous-iron-and-ammonium-rich-diffuse-vents-support-habitat-specific-communities-in-a-shallow-hydrothermal-field-off-the-basiluzzo-islet-aeolian-volcanic-archipelago
#17
G Bortoluzzi, T Romeo, V La Cono, G La Spada, F Smedile, V Esposito, G Sabatino, M Di Bella, S Canese, G Scotti, M Bo, L Giuliano, D Jones, P N Golyshin, M M Yakimov, F Andaloro
Ammonium- and Fe(II)-rich fluid flows, known from deep-sea hydrothermal systems, have been extensively studied in the last decades and are considered as sites with high microbial diversity and activity. Their shallow-submarine counterparts, despite their easier accessibility, have so far been under-investigated, and as a consequence, much less is known about microbial communities inhabiting these ecosystems. A field of shallow expulsion of hydrothermal fluids has been discovered at depths of 170-400 meters off the base of the Basiluzzo Islet (Aeolian Volcanic Archipelago, Southern Tyrrhenian Sea)...
April 6, 2017: Geobiology
https://www.readbyqxmd.com/read/28363177/petroleum-oil-and-mercury-pollution-from-shipwrecks-in-norwegian-coastal-waters
#18
Kuria Ndungu, Björnar A Beylich, André Staalstrøm, Sigurd Øxnevad, John A Berge, Hans Fredrik Veiteberg Braaten, Morten Schaanning, Rune Bergstrøm
Worldwide there are tens of thousands of sunken shipwrecks lying on the coastal seabed. These potentially polluting wrecks (PPW) are estimated to hold 3-25milliont of oil. Other hazardous cargo in PPW includes ordnance, chemicals and radioactive waste. Here, we present and discuss studies on mercury (Hg) and oil pollution in coastal marine sediment caused by two of the >2100 documented PPW in Norwegian marine waters. The German World War II (WWII) submarine (U-864) lies at about 150m below the sea surface, near the Norwegian North Sea island of Fedje...
March 28, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28344573/submarine-basaltic-glass-colonization-by-the-heterotrophic-fe-ii-oxidizing-and-siderophore-producing-deep-sea-bacterium-pseudomonas-stutzeri-vs-10-the-potential-role-of-basalt-in-enhancing-growth
#19
Lisa A Sudek, Greg Wanger, Alexis S Templeton, Hubert Staudigel, Bradley M Tebo
Phylogenetically and metabolically diverse bacterial communities have been found in association with submarine basaltic glass surfaces. The driving forces behind basalt colonization are for the most part unknown. It remains ambiguous if basalt provides ecological advantages beyond representing a substrate for surface colonization, such as supplying nutrients and/or energy. Pseudomonas stutzeri VS-10, a metabolically versatile bacterium isolated from Vailulu'u Seamount, was used as a model organism to investigate the physiological responses observed when biofilms are established on basaltic glasses...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28343360/tsunami-run-up-and-inundation-along-the-coast-of-sabah-and-sarawak-malaysia-due-to-a-potential-brunei-submarine-mass-failure
#20
Wai Kiat Tan, Su Yean Teh, Hock Lye Koh
Submarine landslides, also known as submarine mass failures (SMFs), are major natural marine disasters that could critically damage coastal facilities such as nuclear power plants and oil and gas platforms. It is therefore essential to investigate submarine landslides for potential tsunami hazard assessment. Three-dimensional seismic data from offshore Brunei have revealed a giant seabed mass deposited by a previous SMF. The submarine mass extends over 120 km from the continental slope of the Baram Canyon at 200 m water depth to the deep basin floor of the Northwest Borneo Trough...
March 25, 2017: Environmental Science and Pollution Research International
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