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https://www.readbyqxmd.com/read/28070312/investigation-of-nutritional-properties-of-three-species-of-marine-turban-snails-for-human-consumption
#1
Roslizawati Ab Lah, Joshua Smith, Dale Savins, Ashley Dowell, Daniel Bucher, Kirsten Benkendorff
Turban snails (family Turbinidae) are gastropod molluscs that are harvested for human consumption yet little is known about the nutritional properties of these snails, particularly from Australian waters. This study compares the proximate composition (ash, moisture, protein, and lipid content), fatty acid profiles, mineral, and trace element content of three species of turbinid snails; Turbo militaris, Lunella undulata, and Lunella torquata from northern New South Wales, Australia. They were all found to have relatively high protein in their flesh (16...
January 2017: Food Science & Nutrition
https://www.readbyqxmd.com/read/28069941/uranium-iv-adsorption-by-natural-organic-matter-in-anoxic-sediments
#2
Sharon E Bone, James J Dynes, John Cliff, John R Bargar
Uranium is an important carbon-free fuel source and environmental contaminant that accumulates in the tetravalent state, U(IV), in anoxic sediments, such as ore deposits, marine basins, and contaminated aquifers. However, little is known about the speciation of U(IV) in low-temperature geochemical environments, inhibiting the development of a conceptual model of U behavior. Until recently, U(IV) was assumed to exist predominantly as the sparingly soluble mineral uraninite (UO2+x) in anoxic sediments; however, studies now show that this is not often the case...
January 9, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28067268/regional-adaptation-defines-sensitivity-to-future-ocean-acidification
#3
Piero Calosi, Sedercor Melatunan, Lucy M Turner, Yuri Artioli, Robert L Davidson, Jonathan J Byrne, Mark R Viant, Stephen Widdicombe, Simon D Rundle
Physiological responses to temperature are known to be a major determinant of species distributions and can dictate the sensitivity of populations to global warming. In contrast, little is known about how other major global change drivers, such as ocean acidification (OA), will shape species distributions in the future. Here, by integrating population genetics with experimental data for growth and mineralization, physiology and metabolomics, we demonstrate that the sensitivity of populations of the gastropod Littorina littorea to future OA is shaped by regional adaptation...
January 9, 2017: Nature Communications
https://www.readbyqxmd.com/read/28065572/uneven-distribution-of-inorganic-pollutants-in-marine-air-originating-from-ocean-going-ships
#4
László Bencs, Benjamin Horemans, Anna Jolanta Buczyńska, René Van Grieken
The distribution of mass, water-soluble inorganic salts and mineral elements of size-segregated aerosols (PM1, PM2.5-1 and PM10-2.5), precursor gaseous pollutants, black carbon, and nanoparticles (10-300 nm size range) at the Southern Bight of the North Sea has been studied. The concentrations of air pollutants peaked over shipping lanes, open-water anchorage areas and frequently navigated waters, due to the presence of mobile emission sources. A considerable decrease in air pollutant levels was seen when diverting from these marine areas towards remote or coastal banks...
January 5, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28063184/biologically-agglutinated-eukaryotic-microfossil-from-cryogenian-cap-carbonates
#5
K R Moore, T Bosak, F A Macdonald, D J G Lahr, S Newman, C Settens, S B Pruss
Cryogenian cap carbonates that overlie Sturtian glacial deposits were formed during a post-glacial transgression. Here, we describe microfossils from the Kakontwe Formation of Zambia and the Taishir Formation of Mongolia-both Cryogenian age, post-Sturtian cap carbonates-and investigate processes involved in their formation and preservation. We compare microfossils from these two localities to an assemblage of well-documented microfossils previously described in the post-Sturtian Rasthof Formation of Namibia...
January 6, 2017: Geobiology
https://www.readbyqxmd.com/read/27991953/barium-and-its-importance-as-an-indicator-of-paleo-productivity
#6
Bianca T P Liguori, Marcelo G DE Almeida, Carlos E DE Rezende
Barium (Ba) is a trace element which occurs predominantly as barite mineral (BaSO4) in the marine environment. Previous work suggests that barite concentrations are related to the organic carbon flux and marine biological debris in the water column suggesting a direct or indirect involvement in the marine biological cycling. In addition, barite has a high preservation rate (~30%) in sediments and it is less affected by early diagenesis than other proxies for productivity such as carbonates (~10%) and organic carbon (~1%), for example...
October 2016: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/27986324/determination-of-sediment-metal-background-concentrations-and-enrichment-in-marine-environments-a-critical-review
#7
REVIEW
G F Birch
'Background' is the concentration of metals in pristine sediment, unaltered by human activity and 'enrichment' is the extent present-day sediment metal concentrations exceed pre-anthropogenic levels (the magnitude of human-induced change). Background and enrichment are becoming more frequently used for management measures to bring sediment and the environment back to near-pristine levels. Of the six empirical methods reviewed for determining background (global values, pristine marine and fluvial sediments, catchment soils and rocks), the use of sedimentary cores has the greatest advantage...
December 13, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27974830/stress-physiology-and-weapon-integrity-of-intertidal-mantis-shrimp-under-future-ocean-conditions
#8
Maya S deVries, Summer J Webb, Jenny Tu, Esther Cory, Victoria Morgan, Robert L Sah, Dimitri D Deheyn, Jennifer R A Taylor
Calcified marine organisms typically experience increased oxidative stress and changes in mineralization in response to ocean acidification and warming conditions. These effects could hinder the potency of animal weapons, such as the mantis shrimp's raptorial appendage. The mechanical properties of this calcified weapon enable extremely powerful punches to be delivered to prey and aggressors. We examined oxidative stress and exoskeleton structure, mineral content, and mechanical properties of the raptorial appendage and the carapace under long-term ocean acidification and warming conditions...
December 15, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27923577/particulate-organic-matter-in-rivers-of-fukushima-an-unexpected-carrier-phase-for-radiocesiums
#9
Maud Naulier, Frédérique Eyrolle-Boyer, Patrick Boyer, Jean-Michel Métivier, Yuichi Onda
The role of particulate organic matter in radiocesium transfers from soils to rivers was investigated in areas contaminated by the Fukushima Daiichi Nuclear Power Plant accident. Suspended and deposited sediments, filtered water, macro organic debris and dead leaves were sampled along the six most contaminated coastal river catchments of the Fukushima prefecture in the early autumns 2013 and 2014. Radiocesium concentrations of river samples and total organic carbon concentrations in suspended and deposited sediments were measured...
February 1, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/27896426/expression-and-characterization-of-a-codon-optimized-alkaline-stable-carbonic-anhydrase-from-aliivibrio-salmonicida-for-co2-sequestration-applications
#10
So-Young Jun, Sung Ho Kim, Bashista Kumar Kanth, Jinwon Lee, Seung Pil Pack
The CO2 mineralization process, accelerated by carbonic anhydrase (CA) was proposed for the efficient capture and storage of CO2, the accumulation of which in the atmosphere is the main cause of global warming. Here, we characterize a highly stable form of the cloned CA from the Gram-negative marine bacterium Aliivibrio salmonicida, named ASCA that can promote CO2 absorption in an alkaline solvent required for efficient carbon capture. We designed a mature form of ASCA (mASCA) using a codon optimization of ASCA gene and removal of ASCA signal peptide...
November 28, 2016: Bioprocess and Biosystems Engineering
https://www.readbyqxmd.com/read/27858274/the-assessment-of-source-attribution-of-soil-pollution-in-a-typical-e-waste-recycling-town-and-its-surrounding-regions-using-the-combined-organic-and-inorganic-dataset
#11
Jie Luo, Shihua Qi, Xianming Xie, X W Sophie Gu, Jinji Wang
Guiyu is a well-known electronic waste dismantling and recycling town in south China. Concentrations and distribution of the 21 mineral elements and 16 polycyclic aromatic hydrocarbons (PAHs) collected there were evaluated. Principal component analyses (PCA) applied to the data matrix of PAHs in the soil extracted three major factors explaining 85.7% of the total variability identified as traffic emission, coal combustion, and an unidentified source. By using metallic or metalloid element concentrations as variables, five principal components (PCs) were identified and accounted for 70...
November 17, 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27852903/effects-of-teriparatide-compared-with-risedronate-on-recovery-after-pertrochanteric-hip-fracture-results-of-a-randomized-active-controlled-double-blind-clinical-trial-at-26-weeks
#12
Per Aspenberg, Jorge Malouf, Umberto Tarantino, Pedro A García-Hernández, Costantino Corradini, Søren Overgaard, Jan J Stepan, Lars Borris, Eric Lespessailles, Frede Frihagen, Kyriakos Papavasiliou, Helmut Petto, José Ramón Caeiro, Fernando Marin
BACKGROUND: Osteoporosis drugs might affect fracture-healing. We therefore studied the effects of teriparatide in comparison with risedronate on recovery after pertrochanteric hip fractures. METHODS: The study was a randomized, multicenter, active-controlled, 78-week trial comparing teriparatide (20 μg/day) with risedronate (35 mg/week) initiated within 2 weeks after fixation of a low-trauma pertrochanteric hip fracture (AO/OTA 31-A1 or 31-A2). The main inclusion criteria were a bone mineral density T-score of ≤-2...
November 16, 2016: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/27852448/isotopic-evidence-of-nitrogen-sources-and-nitrogen-transformation-in-arsenic-contaminated-groundwater
#13
Tsung-Nan Weng, Chen-Wuing Liu, Yu-Hsuan Kao, Silver Sung-Yun Hsiao
High concentrations of naturally occurring arsenic (As) are typically found in young alluvial and deltaic deposits, and high concentrations of ammonium (NH4(+)) and nitrate (NO3(-)) are often present in groundwater affected by anthropogenic activities. In this study, on the basis of physicochemical characteristics of groundwater and the nitrogen and oxygen isotope composition of NO3(-), it was inferred that the main sources of NO3(-) in the proximal fan of the Choushui River alluvial fan are likely to be ammonium fertilizers, manure, and septic waste; that in the mid-fan and the distal fan, the possible sources are nitrate fertilizers and marine nitrate...
February 1, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/27847499/abundance-and-distribution-of-enteric-bacteria-and-viruses-in-coastal-and-estuarine-sediments-a-review
#14
REVIEW
Francis Hassard, Ceri L Gwyther, Kata Farkas, Anthony Andrews, Vera Jones, Brian Cox, Howard Brett, Davey L Jones, James E McDonald, Shelagh K Malham
The long term survival of fecal indicator organisms (FIOs) and human pathogenic microorganisms in sediments is important from a water quality, human health and ecological perspective. Typically, both bacteria and viruses strongly associate with particulate matter present in freshwater, estuarine and marine environments. This association tends to be stronger in finer textured sediments and is strongly influenced by the type and quantity of clay minerals and organic matter present. Binding to particle surfaces promotes the persistence of bacteria in the environment by offering physical and chemical protection from biotic and abiotic stresses...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27846794/genome-and-catabolic-subproteomes-of-the-marine-nutritionally-versatile-sulfate-reducing-bacterium-desulfococcus-multivorans-dsm-2059
#15
Marvin Dörries, Lars Wöhlbrand, Michael Kube, Richard Reinhardt, Ralf Rabus
BACKGROUND: Sulfate-reducing bacteria (SRB) are key players of the carbon- and sulfur-cycles in the sediments of the world's oceans. Habitat relevant SRBs are often members of the Desulfosarcina-Desulfococcus clade belonging to the deltaproteobacterial family of Desulfobacteraceae. Despite this environmental recognition, their molecular (genome-based) physiology and their potential to contribute to organic carbon mineralization as well as to adapt to changing environmental conditions have been scarcely investigated...
November 15, 2016: BMC Genomics
https://www.readbyqxmd.com/read/27843721/antioxidant-nutrition-in-atlantic-salmon-salmo-salar-parr-and-post-smolt-fed-diets-with-high-inclusion-of-plant-ingredients-and-graded-levels-of-micronutrients-and-selected-amino-acids
#16
Kristin Hamre, Nini H Sissener, Erik-Jan Lock, Pål A Olsvik, Marit Espe, Bente E Torstensen, Joana Silva, Johan Johansen, Rune Waagbø, Gro-Ingunn Hemre
The shift from marine to plant-based ingredients in fish feeds affects the dietary concentrations and bioavailability of micronutrients, amino acids and lipids and consequently warrants a re-evaluation of dietary nutrient recommendations. In the present study, an Atlantic salmon diet high in plant ingredients was supplemented with graded levels of nutrient premix (NP), containing selected amino acids, taurine, cholesterol, vitamins and minerals. This article presents the results on the antioxidant nutrients vitamin C, E and selenium (Se), and effects on tissue redox status...
2016: PeerJ
https://www.readbyqxmd.com/read/27836270/geochemistry-of-recent-aragonite-rich-sediments-in-mediterranean-karstic-marine-lakes-trace-elements-as-pollution-and-palaeoredox-proxies-and-indicators-of-authigenic-mineral-formation
#17
Ivan Sondi, Nevenka Mikac, Neda Vdović, Maja Ivanić, Martina Furdek, Srečo D Škapin
This study investigates the geochemical characteristics of recent shallow-water aragonite-rich sediments from the karstic marine lakes located in the pristine environment on the island of Mljet (Adriatic Sea). Different trace elements were used as authigenic mineral formation, palaeoredox and pollution indicators. The distribution and the historical record of trace elements deposition mostly depended on the sedimentological processes associated with the formation of aragonite, early diagenetic processes governed by the prevailing physico-chemical conditions and on the recent anthropogenic activity...
February 2017: Chemosphere
https://www.readbyqxmd.com/read/27827457/evidence-of-anomalously-low-%C3%AE-13-c-of-marine-organic-matter-in-an-arctic-fjord
#18
Vikash Kumar, Manish Tiwari, Siddhesh Nagoji, Shubham Tripathi
Accurate estimation of relative carbon deposition (marine vs. terrestrial) is required for understanding the global carbon budget, particularly in the Arctic region, which holds disproportionate importance with respect to global carbon cycling. Although the sedimentary organic matter (SOM) concentration and its isotopic composition are important tools for such calculations, uncertainties loom over estimates provided by organic-geochemical bulk parameters. We report carbon and nitrogen concentrations and isotopes (δ(13)C and δ(15)N) of SOM at an Arctic fjord namely Kongsfjorden...
November 9, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27826293/assessing-marine-microbial-induced-corrosion-at-santa-catalina-island-california
#19
Gustavo A Ramírez, Colleen L Hoffman, Michael D Lee, Ryan A Lesniewski, Roman A Barco, Arkadiy Garber, Brandy M Toner, Charles G Wheat, Katrina J Edwards, Beth N Orcutt
High iron and eutrophic conditions are reported as environmental factors leading to accelerated low-water corrosion, an enhanced form of near-shore microbial induced corrosion. To explore this hypothesis, we deployed flow-through colonization systems in laboratory-based aquarium tanks under a continuous flow of surface seawater from Santa Catalina Island, CA, USA, for periods of 2 and 6 months. Substrates consisted of mild steel - a major constituent of maritime infrastructure - and the naturally occurring iron sulfide mineral pyrite...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27791286/biodegradation-and-mineralization-of-isotopically-labeled-tnt-and-rdx-in-anaerobic-marine-sediments
#20
Thivanka Ariyarathna, Penny Vlahos, Richard W Smith, Stephen Fallis, Thomas Groshens, Craig Tobias
The lack of knowledge on the fate of explosive compounds 2,4,6-trinitrotoluene (TNT) and hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX), particularly in marine ecosystems, constrains the application of bioremediation techniques in explosive-contaminated coastal sites. The authors present a comparative study on anaerobic biodegradation and mineralization of (15) N-nitro group isotopically labeled TNT and RDX in organic carbon-rich, fine-grained marine sediment with native microbial assemblages. Separate sediment slurry experiments were carried out for TNT and RDX at 23°C for 16 d...
October 28, 2016: Environmental Toxicology and Chemistry
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