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https://www.readbyqxmd.com/read/29793198/assessment-of-cu-sub-lethal-toxicity-lc-50-in-the-cold-water-gorgonian-dentomuricea-meteor-under-a-deep-sea-mining-activity-scenario
#1
Inês Martins, António Godinho, Joana Goulart, Marina Carreiro-Silva
Previous aquaria-based experiments have shown dissolution and leaching of metals, especially copper (Cu), from the simulated sediment plumes generated during mining activities resulting in a pronounced increase of Cu contamination in the surrounding seawater. Metals are bioavailable to corals with food, through ingestion (particulate phase) and through tissue-facilitated transport (passive diffusion). With corals being particularly vulnerable to metal contamination, resuspension of metal-bearing sediments during mining activities represents an important ecological threat...
May 21, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29773961/an-example-of-aerosol-pattern-variability-over-bright-surface-using-high-resolution-modis-maiac-the-eastern-and-western-areas-of-the-dead-sea-and-environs
#2
Sever Lee, Alpert Pinhas, Lyapustin Alexei, Wang Yujie, Chudnovsky A Alexandra
The extreme rate of evaporation of the Dead Sea (DS) has serious implicatios for the surrounding area, including atmospheric conditions. This study analyzes the aerosol properties over the western and eastern parts of the DS during the year 2013, using MAIAC (Multi-Angle Implementation of Atmospheric Correction) for MODIS, which retrieves aerosol optical depth (AOD) data at a resolution of 1km. The main goal of the study is to evaluate MAIAC over the study area and determine, for the first time, the prevailing aerosol spatial patterns...
September 2017: Atmospheric Environment
https://www.readbyqxmd.com/read/29761700/oil-droplet-size-distributions-in-deep-sea-blowouts-influence-of-pressure-and-dissolved-gases
#3
Karen Malone, Simeon Pesch, Michael Schlüter, Dieter Krause
To date, experimental investigations to determine the droplet size distribution (DSD) of subsea oil spills were mostly conducted at surface conditions, i.e. at atmospheric pressure, and with dead, i.e. purely liquid, oils. To investigate the influence of high hydrostatic pressure and of gases dissolved in the oil on the DSD, experiments with a downscaled blowout are conducted in a high-pressure autoclave at 150 bar hydrostatic pressure. Jets of "live", i.e. methane-saturated, crude oil and n-decane are compared to jets of "dead" hydrocarbon liquids in artificial seawater...
May 15, 2018: Environmental Science & Technology
https://www.readbyqxmd.com/read/29730716/metal-and-isotope-analysis-of-bird-feathers-in-a-contaminated-estuary-reveals-bioaccumulation-biomagnification-and-potential-toxic-effects
#4
L D Einoder, C K MacLeod, C Coughanowr
The Derwent estuary, in south east Tasmania, is highly contaminated with heavy metals, mainly due to past industrial pollution. This study sought to determine the extent of contamination, bioaccumulation, and biomagnification in the resident bird community and therefore to infer the potential for adverse effects in birds. Thirteen metals were measured from breast feathers (n = 51 individuals) of eight sympatric species of aquatic bird. Stable carbon (δ13 C) and nitrogen (δ15 N) isotopes were used to identify dietary sources of contaminants, trophic level, and potential biomagnification through food chains...
May 5, 2018: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/29716601/osteoarthritis-of-the-temporomandibular-joint-in-the-eastern-atlantic-harbour-seal-phoca-vitulina-vitulina-from-the-german-north-sea-a-study-of-the-lesions-seen-in-dry-bone
#5
Catharina Ludolphy, Patricia Kahle, Horst Kierdorf, Uwe Kierdorf
BACKGROUND: Pathological changes and resulting functional impairment of the temporomandibular joint (TMJ) can substantially affect physical condition, morbidity, and mortality of wildlife species. Analysis of TMJ disorders is therefore of interest for the characterization of the health status of populations of wild mammals. This paper, for the first time, analyses the prevalence of TMJ osteoarthritis (TMJ-OA) and the spectrum of osteoarthritic bone lesions of the TMJ in the Eastern Atlantic harbour seal (Phoca vitulina vitulina), applying a standardized scoring system...
May 2, 2018: BMC Veterinary Research
https://www.readbyqxmd.com/read/29656641/attachment-of-alcanivorax-borkumensis-to-hexadecane-in-artificial-sea-water-emulsion-droplets
#6
Akram Abbasi, Geoffrey D Bothun, Arijit Bose
Alcanivorax borkumensis (AB) is a marine bacterium that dominates bacterial communities around many oil spills because it enzymatically degrades the oil while using it as a nutrient source. Several dispersants have been used to produce oil-in-water emulsions following a spill. Compared to surface slicks, the additional oil-water surface area produced by emulsification provides greater access to the oil, and accelerates its degradation. We deliberately cultured AB cells using hexadecane as the only nutrient source...
April 16, 2018: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29649222/detecting-hierarchical-levels-of-connectivity-in-a-population-of-acacia-tortilis-at-the-northern-edge-of-the-species-global-distribution-combining-classical-population-genetics-and-network-analyses
#7
Yael S Rodger, Gili Greenbaum, Micha Silver, Shirli Bar-David, Gidon Winters
Genetic diversity and structure of populations at the edge of the species' spatial distribution are important for potential adaptation to environmental changes and consequently, for the long-term survival of the species. Here, we combined classical population genetic methods with newly developed network analyses to gain complementary insights into the genetic structure and diversity of Acacia tortilis, a keystone desert tree, at the northern edge of its global distribution, where the population is under threat from climatic, ecological, and anthropogenic changes...
2018: PloS One
https://www.readbyqxmd.com/read/29540726/slip-deficit-and-temporal-clustering-along-the-dead-sea-fault-from-paleoseismological-investigations
#8
Marthe Lefevre, Yann Klinger, Mahmoud Al-Qaryouti, Maryline Le Béon, Khaled Moumani
Temporal distribution of earthquakes is key to seismic hazard assessment. However, for most fault systems shortness of large earthquake catalogues makes this assessment difficult. Its unique long earthquake record makes the Dead Sea fault (DSF) exceptional to test earthquake behaviour models. A paleoseismological trench along the southern section of the DSF, revealed twelve surface-rupturing earthquakes during the last 8000 years, of which many correlate with past earthquakes reported in historical chronicles...
March 14, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29475650/chasing-phthalates-in-tissues-of-marine-turtles-from-the-mediterranean-sea
#9
Dario Savoca, Marco Arculeo, Salvatore Barreca, Silvestre Buscemi, Santo Caracappa, Antonino Gentile, Maria Flaminia Persichetti, Andrea Pace
Tissues from thirteen specimens of marine turtles, one Dermochelys coriacea and twelve Caretta caretta, found dead along the Sicilian coasts in 2016 were analyzed for the presence of phthalates. Four phthalates (DEP, DBP, BBP, and DEHP) were found at different significant concentrations in liver and gonads, while only DBP was found in muscle tissues and at a fourfold lower concentration than other phthalates in Dermochelys coriacea. No traces of DEP were detected in C. caretta tissues where DOTP was also revealed...
February 2018: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/29390076/unique-trna-gene-profile-suggests-paucity-of-nucleotide-modifications-in-anticodons-of-a-deep-sea-symbiotic-spiroplasma
#10
Yong Wang, Fang-Chao Zhu, Li-Sheng He, Antoine Danchin
The position 34 of a tRNA is always modified for efficient recognition of codons and accurate integration of amino acids by the translation machinery. Here, we report genomics features of a deep-sea gut symbiotic Spiroplasma, which suggests that the organism does not require tRNA(34) anticodon modifications. In the genome, there is a novel set of tRNA genes composed of 32 species for recognition of the 20 amino acids. Among the anticodons of the tRNAs, we witnessed the presence of both U34- and C34-containing tRNAs required to decode NNR (A/G) 2:2 codons as countermeasure of probable loss of anticodon modification genes...
March 16, 2018: Nucleic Acids Research
https://www.readbyqxmd.com/read/29384746/day-to-day-issues-in-the-forensic-identification-practice-related-to-illegal-immigration-in-italy
#11
V Pinchi, M Focardi, F Pradella, R Grifoni, M Palandri, G A Norelli
The migratory flows to Europe from the African countries, Asia and Middle East, have hugely intensified in the recent years. In 2016, more than 98,000 out of a total of 260,000 migrants across the Mediterranean Sea arrived in Italy and in May 2017, the trend of arrivals is: Italy +576%; Greece -39% compared to previous years. Some migrants die before touching the sole of the European continent, during the crossing, often afforded with ships, made available by unscrupulous smugglers or criminal organizations, which are unsuitable for this type of transportation...
December 1, 2017: Journal of Forensic Odonto-stomatology
https://www.readbyqxmd.com/read/29384484/brevetoxin-exposure-in-sea-turtles-in-south-texas-usa-during-karenia-brevis-red-tide
#12
Jennifer Shelby Walker, Donna J Shaver, Brian A Stacy, Leanne J Flewelling, Margaret H Broadwater, Zhihong Wang
Five green (Chelonia mydas) and 11 Kemp's ridley (Lepidochelys kempii) sea turtles found dead, or that died soon after stranding, on the southern Texas (USA) coast during 2 Karenia brevis blooms (October 2015, September-October 2016) were tested for exposure to brevetoxins (PbTx). Tissues (liver, kidney) and digesta (stomach and intestinal contents) were analyzed by ELISA. Three green turtles found alive during the 2015 event and 2 Kemp's ridley turtles found alive during the 2016 event exhibited signs of PbTx exposure, including lethargy and/or convulsions of the head and neck...
January 31, 2018: Diseases of Aquatic Organisms
https://www.readbyqxmd.com/read/29375088/minimizing-an-outbreak-of-avian-botulism-clostridium-botulinum-type-c-in-incheon-south-korea
#13
Kidong Son, Yong Kwan Kim, Chanjin Woo, Seung-Jun Wang, Youngsik Kim, Jae-Ku Oem, Weonhwa Jheong, Jipseol Jeong
An outbreak of botulism occurred over a two-month period beginning July 20, 2016. In all, 697 wild birds were found paralyzed or dead at the Namdong reservoir and 11 Gong-gu. Using a mouse bioassay, type C botulinum toxin was identified in the bird serum, liquid cultures of soil samples, and maggot extracts. To minimize further infection of wild birds, we opened the floodgates of the Namdong reservoir adjacent to the Yellow Sea; this decreased the water temperature and the nutrient load such as nitrogen and phosphorus...
March 30, 2018: Journal of Veterinary Medical Science
https://www.readbyqxmd.com/read/29369727/respiratory-mites-orthohalarachne-diminuata-and-%C3%AE-hemolytic-streptococci-associated-bronchopneumonia-outbreak-in-south-american-fur-seal-pups-arctocephalus-australis
#14
Mauricio Seguel, Josefina Gutiérrez, Carlos Hernández, Felipe Montalva, Claudio Verdugo
  Although mites of the Orthohalarachne genus are common parasites of otariids, their role as agents of disease and in causing population-level mortality is unknown. In the austral summer of 2016, there was an increase in mortality among South American fur seal ( Arctocephalus australis) pups at Guafo Island, Northern Chilean Patagonia. Pups found dead or terminally ill had moderate to marked, multifocal, mucopurulent bronchopneumonia associated with large numbers of respiratory mites ( Orthohalarachne diminuata) and rare Gram-positive cocci...
April 2018: Journal of Wildlife Diseases
https://www.readbyqxmd.com/read/29290013/physicochemical-characterization-of-sterilized-muds-for-pharmaceutics-cosmetics-applications
#15
Maria D Kamitsou, Varvara Sygouni, Dimitra G Kanellopoulou, Konstantinos Gardikis, Petros G Koutsoukos
Clays and muds have been used for centuries as cosmetics or pharmaceutical products for various therapies. The suitability of muds and clays for health- and beauty-related applications depends on their physicochemical properties, mineralogical composition, particle characteristics and toxicity. In this work, the physicochemical characterization of 12 mud specimens from different natural spa resorts in Greece and one from Israel (Dead Sea) is presented. All specimens were sterilized at 121 °C for 20 min, because of their intended use...
December 30, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/29279987/metabolism-of-a-sea-lamprey-pesticide-by-fish-liver-enzymes-part-b-method-development-and-application-in-quantification-of-tfm-metabolites-formed-in-vivo
#16
Ugo Bussy, Yu-Wen Chung-Davidson, Tyler Buchinger, Ke Li, Scott A Smith, A Daniel Jones, Weiming Li
The sea lamprey (Petromyzon marinus) is a destructive invasive species in the Great Lakes. Since the 1960s, tons of the lampricide 3-trifluoromethyl-4-nitrophenol (TFM) has been applied to selected tributaries each year to eliminate or reduce sea lamprey larval populations. Therefore, the environmental impact of TFM needs to be evaluated. However, the metabolism of TFM and its mechanism of selective toxicity in sea lamprey is not yet fully understood. Based upon our previous report on the identification, synthesis, and characterization of TFM metabolites observed in liver incubates from sea lamprey and non-target fishes, we now provide a robust assay for quantifying TFM and its metabolites in fish liver tissue...
February 2018: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/29245719/-i-aphanius-i-i-kruppi-i-a-new-killifish-from-oman-with-comments-on-the-i-a-dispar-i-species-group-cyprinodontiformes-aphaniidae
#17
Jörg Freyhof, Anton Weissenbacher, Matthias Geiger
Eight species are recognised in the Aphanius dispar group. Aphanius dispar from the Red and Mediterranean Sea basins, A. stoliczkanus from coastal areas of the Arabian/Persian Gulf, the northern Arabian Sea east to Gujarat in India, the Gulf of Oman and some endorheic basins in Iran and Pakistan, A. richardsoni from springs in the Dead Sea basin in Jordan and Israel, A. sirhani from the Azraq Oasis in Jordan, A. ginaonis from one spring in Iran, A. furcatus from few streams and springs in Iran and A. stiassnyae from one lake in Ethiopia...
October 26, 2017: Zootaxa
https://www.readbyqxmd.com/read/29242205/of-pools-oceans-and-the-dead-sea
#18
COMMENT
Samir K Ballas
No abstract text is available yet for this article.
December 14, 2017: Blood
https://www.readbyqxmd.com/read/29233008/non-polar-compounds-of-persian-gulf-sea-cucumber-holothuria-parva-selectively-induce-toxicity-on-skin-mitochondria-isolated-from-animal-model-of-melanoma
#19
Yalda Arast, Nina Seyed Razi, Melika Nazemi, Enayatollah Seydi, Jalal Pourahmad
PURPOSE: Melanoma is a highly aggressive and deadly cancer with a poor prognosis given its drug resistance. A defect in apoptosis is one of the key mechanisms that contribute to drug resistance in Melanoma. An important sea marine animal is the Holothuria parva, also known as the sea cucumber, which has various pharmacological activities. Compounds obtained from sea cucumbers have shown to have anticancer activity through induction of apoptosis singling. MATERIALS AND METHODS: In the present study, selective toxicity and apoptotic effect of three extracts of H...
December 28, 2017: Cutaneous and Ocular Toxicology
https://www.readbyqxmd.com/read/29173258/the-1917-halifax-explosion-the-first-coordinated-local-civilian-medical-response-to-disaster-in-canada
#20
Chryssa N McAlister, Allan E Marble, T Jock Murray
The 1917 Halifax Explosion was an unfortunate but predictable tragedy, given the sea traffic and munitions cargo, resulting in sudden large-scale damage and catastrophic injuries, with 1950 dead and 8000 injured. Although generous support was received from the United States, the bulk of the medical work was undertaken using local resources through an immediate, massive, centrally coordinated medical response. The incredible care provided 100 years ago by these Canadian physicians, nurses and students is often forgotten, but deserves attention...
December 2017: Canadian Journal of Surgery. Journal Canadien de Chirurgie
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