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The distribution and accumulation of mercury and methylmercury in surface sediments beneath the East China Sea.
Abstract China is a massive mercury emitter, responsible for a quarter of the world's mercury emissions, which transit the atmosphere and accumulate throughout its watercourses. The Changjiang (Yangtze) River is the third largest river in the world, integrating mercury emissions over its 1.8 × 106 km2 catchment and channelling them to the East China Sea where they can be buried. Despite its potential global significance, the importance of the East China Sea as a terminal mercury sink remains poorly known. To address this knowledge gap, total mercury and methylmercury concentrations were determined from 51 surfac...
Source: Environmental Science and Pollution Research International - December 18, 2018 Category: Environmental Health Authors: Dong A, Zhai S, Louchouarn P, Izon G, Zhang H, Jiang X Tags: Environ Sci Pollut Res Int Source Type: research

Distribution of perfluorinated alkyl substances in marine shellfish along the Chinese Bohai Sea coast.
In this study, we first evaluated contamination by PFASs in a total of 230 samples of marine shellfish from the Bohai Sea. Samples included five important shellfish species, collected from important aquaculture spots distributed around the Bohai Sea. Samples were analyzed by an ultra-fast liquid chromatography-tandem mass spectrometry method, which could simultaneously detect 23 PFASs in shellfish. Our research verified that PFASs have become a threat to the safety of shellfish products in this area. Furthermore, contamination by PFASs in shellfish changed depending on the components of PFASs, the species of shellfish, and...
Source: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes - January 10, 2019 Category: Environmental Health Authors: Guo M, Zheng G, Peng J, Meng D, Wu H, Tan Z, Li F, Zhai Y Tags: J Environ Sci Health B Source Type: research

Exploring the composition of macromolecular organic matter in Arctic Ocean sediments under a changing sea ice gradient
In this study pyrolysis-gas chromatography-mass spectrometry (Py-GC-MS) has been used to quantify the solvent-insoluble component of marine organic matter in surface sediments to gain a more holistic understanding of the macromolecular composition at five stations along a south to north transect in the Arctic Barents Sea, east of Svalbard (depths 288 – 334 m.b.s.l). Two methods were compared to identify the effectiveness of rapid screening, in contrast to grouping similar pyrolysis products. There were changes in macromolecular composition of marine surface sediments across the S-N transect using both methods, highligh...
Source: Journal of Analytical and Applied Pyrolysis - February 15, 2019 Category: Chemistry Source Type: research

Ecological risk assessment of heavy metals in sediments and water from the coastal areas of the Bohai Sea and the Yellow Sea.
Abstract The Yellow Sea Large Marine Ecosystem (YSLME) is an important socioeconomic zone in Asia, but has been deteriorated by various environmental pollutants over the last half century. However, comprehensive coastal pollution assessments, particularly for heavy metals (HMs), have been limited from an international perspective. Here, we first evaluate coastal HM pollution in sediment and water from 119 riverine, estuarine, and marine locations along the BS and Yellow Sea to perform a comparative assessment between the two countries of China and South Korea. The occurrence, distribution, sources, multimedia fate...
Source: Environment International - January 26, 2020 Category: Environmental Health Authors: Tian K, Wu Q, Liu P, Hu W, Huang B, Shi B, Zhou Y, Kwon BO, Choi K, Ryu J, Seong Khim J, Wang T Tags: Environ Int Source Type: research

What Are the Complications of Inhalant Abuse?
Discussion Hydrocarbons (HC) are organic compounds that are abused because they produce a euphoric effect, usually quickly, are low cost and easily obtained. They are commonly abused by adolescents and use in the US is either stable or increasing. Volatile HC rapidly distribute throughout the body which produces euphoria in seconds to minutes. There are 3 ways that HC are inhaled: Sniffing – directly inhaling the HC from the container. This has the lowest HC concentration. Huffing – a cloth is saturated with the HC and then the cloth is held to the nose and mouth and inhaled. This has a higher concentration ...
Source: PediatricEducation.org - May 4, 2020 Category: Pediatrics Authors: Pediatric Education Tags: Uncategorized Source Type: news

The identification of the new species Nitratireductor thuwali sp. nov. reveals the untapped diversity of hydrocarbon-degrading culturable bacteria from the arid mangrove sediments of the Red Sea
IntroductionThe geological isolation, lack of freshwater inputs and specific internal water circulations make the Red Sea one of the most extreme—and unique—oceans on the planet. Its high temperature, salinity and oligotrophy, along with the consistent input of hydrocarbons due to its geology (e.g., deep-sea vents) and high oil tankers traffic, create the conditions that can drive and influence the assembly of unique marine (micro)biomes that evolved to cope with these multiple stressors. We hypothesize that mangrove sediments, as a model-specific marine environment of the Red Sea, act as microbial hotspots/reservoirs ...
Source: Frontiers in Microbiology - May 2, 2023 Category: Microbiology Source Type: research

Consumer preferences regarding the introduction of new organic products. The case of the Mediterranean sea bass (Dicentrarchus labrax) in Italy.
Abstract The introduction of new products on the market poses several challenges; in particular, whether the characteristics of the proposed product will be judged positively by potential consumers. This paper analyses the preferences of consumers regarding the introduction on the Italian market of a new product: organic Mediterranean sea bass. The aim of this study is to assess the importance given by consumers to four main characteristics of sea bass (country of origin, size, production method - organic or conventional - and price) so as to be able to formulate marketing strategies. We applied a choice experimen...
Source: Appetite - December 23, 2012 Category: Nutrition Authors: Mauracher C, Tempesta T, Vecchiato D Tags: Appetite Source Type: research

Contribution of petroleum-derived organic carbon to sedimentary organic carbon pool in the eastern Yellow Sea (the northwestern Pacific).
Abstract We investigated molecular distributions and stable carbon isotopic compositions (δ(13)C) of sedimentary n-alkanes (C15C35) in the riverbank and marine surface sediments to trace natural and anthropogenic organic carbon (OC) sources in the eastern Yellow Sea which is a river dominated marginal sea. Molecular distributions of n-alkanes are overall dominated by odd-carbon-numbered high molecular weight n-C27, n-C29, and n-C31. The δ(13)C signatures of n-C27, n-C29, and n-C31 indicate a large contribution of C3 gymnosperms as the main source of n-alkanes, with the values of -29.5 ± 1.3‰, -30.3 ± 2...
Source: Chemosphere - December 1, 2016 Category: Chemistry Authors: Kim JH, Lee DH, Yoon SH, Jeong KS, Choi B, Shin KH Tags: Chemosphere Source Type: research

Air-sea exchange and gas-particle partitioning of polycyclic aromatic hydrocarbons over the northwestern Pacific Ocean: Role of East Asian continental outflow.
Abstract We measured 15 parent polycyclic aromatic hydrocarbons (PAHs) in atmosphere and water during a research cruise from the East China Sea (ECS) to the northwestern Pacific Ocean (NWP) in the spring of 2015 to investigate the occurrence, air-sea gas exchange, and gas-particle partitioning of PAHs with a particular focus on the influence of East Asian continental outflow. The gaseous PAH composition and identification of sources were consistent with PAHs from the upwind area, indicating that the gaseous PAHs (three-to five-ring PAHs) were influenced by upwind land pollution. In addition, air-sea exchange fluxe...
Source: Environmental Pollution - July 1, 2017 Category: Environmental Health Authors: Wu Z, Lin T, Li Z, Jiang Y, Li Y, Yao X, Gao H, Guo Z Tags: Environ Pollut Source Type: research

The drivers of sea lice management policies and how best to integrate them into a risk management strategy: An ecosystem approach to sea lice management
Abstract The control of sea lice infestations on cultivated Atlantic salmon is a major issue in many regions of the world. The numerous drivers which shape the priorities and objectives of the control strategies vary for different regions/jurisdictions. These range from the animal welfare and economic priorities of the producers, to the mitigation of any potential impacts on wild stocks. Veterinary ethics, environmental impacts of therapeutants, and impacts for organic certification of the produce are, amongst others, additional sets of factors which should be considered. Current best practice in both EU and international ...
Source: Journal of Fish Diseases - October 13, 2017 Category: Zoology Authors: D Jackson, O Moberg, E M Stenevik Djupev åg, F Kane, H Hareide Tags: SPECIAL ISSUE Source Type: research

Matching Seniors and Caregivers: Interview with Josh Bruno, Founder/CEO of Hometeam, and Dr. Jeffrey A. Sachs, Hometeam Advisor
Finding a suitable caregiver for an elderly relative can be difficult, and leaving a vulnerable loved one with a stranger can be tough, especially if they have very specific medical or care needs. An innovative platform, developed by Hometeam, a comp...
Source: Medgadget - October 31, 2017 Category: Medical Devices Authors: Conn Hastings Tags: Exclusive Geriatrics Medicine Source Type: blogs

Evolution of natural sea surface films: a new quantification formalism based on multidimensional space vector.
Abstract Spatial and temporal variability of natural surfactant sea surface film structural parameters were evaluated from force-area isotherms, film pressure-temperature isochors, dynamic surface tension-time relations performed on samples collected in Baltic Sea shallow coastal waters. The film structure state was postulated as a 10-D dimensionless vector created from the normalized thermodynamic, adsorptive, and viscoelastic film parameters. The normalization procedure is based on the concept of self-corresponding states known in thermodynamics. The values taken by all the reduced parameters indicated a signifi...
Source: Environmental Science and Pollution Research International - December 3, 2017 Category: Environmental Health Authors: Boniewicz-Szmyt K, Pogorzelski SJ Tags: Environ Sci Pollut Res Int Source Type: research

Metal pollution across the upper delta plain wetlands and its adjacent shallow sea wetland, northeast of China: implications for the filtration functions of wetlands.
Abstract Grain size and concentrations of organic carbon (Corg) and particulate metals (PMs) As, Cd, Cr, Cu, Hg, Pb, Zn, Al, Fe, and Mn of 373 surface sediment samples, salinities in 67 surface water samples, were analyzed in various environments, including the upper delta plain wetlands (UDPW), its adjacent shallow sea wetland (SSW) in the Liaodong Bay, and river channels that are running through the Liaohe Delta, to evaluate the spatial distribution, transportation environmental dynamics of metals, and the provenance of metal pollution and assess the filtration functions of wetlands. The concentrations of PMs fo...
Source: Environmental Science and Pollution Research International - December 12, 2017 Category: Environmental Health Authors: Liu J, Ye S, Yuan H, Ding X, Zhao G, Yang S, He L, Wang J, Pei S, Huang X Tags: Environ Sci Pollut Res Int Source Type: research

Bathyal feasting: post-spawning squid as a source of carbon for deep-sea benthic communities
In many oceanic carbon budgets there is a discrepancy between the energetic requirements of deep-sea benthic communities and the supply of organic matter. This suggests that there are unidentified and unmeasured food sources reaching the seafloor. During 11 deep-sea remotely operated vehicle (ROV) surveys in the Gulf of California, the remains (squid carcasses and hatched-out egg sheets) of 64 post-brooding squid were encountered. As many as 36 remains were encountered during a single dive. To our knowledge this is one of the largest numbers of natural food falls of medium-size deep-sea nekton described to date. Various de...
Source: Proceedings of the Royal Society B: Biological Sciences - December 20, 2017 Category: Biology Authors: Hoving, H. J. T., Bush, S. L., Haddock, S. H. D., Robison, B. H. Tags: ecology Source Type: research

The interaction of trace heavy metal with lipid monolayer in the sea surface microlayer.
Abstract Lipid molecules and trace heavy metals are enriched in sea surface microlayer and can be transferred into the sea spray aerosol. To better understand their impact on marine aerosol generation and evolution, we investigated the interaction of trace heavy metals including Fe3+, Pb2+, Zn2+, Cu2+, Ni2+, Cr3+, Cd2+, and Co2+, with dipalmitoylphosphatidylcholine (DPPC) monolayers at the air-water interface. Phase behavior of the DPPC monolayer on heavy metal solutions was probed with surface pressure-area (π-A) isotherms. The conformation order and orientation of DPPC alkyl chains were characterized by infrare...
Source: Chemosphere - January 2, 2018 Category: Chemistry Authors: Li S, Du L, Tsona NT, Wang W Tags: Chemosphere Source Type: research