177,043 results match your criteria Marine pollution bulletin[Journal]


Polychaete mucopolysaccharide alters sediment microbial diversity and stimulates ammonia-oxidising functional groups.

FEMS Microbiol Ecol 2018 Dec 14. Epub 2018 Dec 14.

Marine Biological Association of the United Kingdom, The Laboratory, Citadel Hill, Plymouth, PL1 2PB.

Sediment nitrogen cycling is a network of microbially-mediated biogeochemical processes that are vital in regulating ecosystem functioning. Mucopolysaccharides (mucus) are produced by many invertebrates and have the potential to be an important source of organic carbon and nitrogen to sediment microorganisms. At present, we have limited understanding of how mucopolysaccharide moderates total sediment microbial communities and specific microbial functional groups that drive nitrogen cycling processes. Read More

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December 2018
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Field evaluation of sequential hand wipes for flame retardant exposure in an electronics recycling facility.

Chemosphere 2018 Dec 5;219:472-481. Epub 2018 Dec 5.

College of William & Mary, Virginia Institute of Marine Science, Department Aquatic Health Sciences, Gloucester Point, VA, USA.

Flame retardants have been associated with endocrine disorders, thyroid disruption, reproductive toxicity, and immunological interference. Through dismantling and recycling electronics and electric products, flame retardants can be released into the air and settle on work surfaces which may lead to dermal exposure. Hand wipe sampling is commonly used to evaluate dermal exposure. Read More

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December 2018

Spatial distribution and source identification of hydrophobic organic compounds (HOCs) on sedimentary microplastic in Hong Kong.

Chemosphere 2018 Dec 7;219:418-426. Epub 2018 Dec 7.

Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Hong Kong Special Administrative Region; State Key Laboratory in Marine Pollution, City University of Hong Kong, Tat Chee Avenue, Hong Kong Special Administrative Region. Electronic address:

The spatial distribution, composition and source of hydrophobic organic compounds (HOCs) including polyaromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs) and organochlorinated pesticides (OCPs) of the sedimentary microplastics (0.25-5 mm) in Hong Kong were investigated. The concentration of ΣPAHs ranged between 70. Read More

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December 2018

Preliminary investigation of Rn in the Yakumo Wind-hole, an algific talus deposits, from Izumo, southwest Honshu, Japan.

J Environ Radioact 2018 Dec 11;197:109-115. Epub 2018 Dec 11.

Mutsu Marine Laboratory, Japan Marine Science Foundation, Minato, Mutsu, Aomori, 035-0064, Japan. Electronic address:

The Yakumo Wind-hole in southwest Japan formed by landslip, and it is known as a cold air blowhole. This wind-hole consists of two parts, which have complementary relationships in regard to the flow of air, namely, topographically upper and lower holes that can be characterized as a warm wind-hole (WWH) and cold wind-hole (CWH), respectively. We carried out a preliminary investigation of radon behavior in the Yakumo Wind-hole. Read More

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December 2018

Investigating the physiological mechanisms underlying Salicornia ramosissima response to atmospheric CO enrichment under coexistence of prolonged soil flooding and saline excess.

Plant Physiol Biochem 2018 Dec 6;135:149-159. Epub 2018 Dec 6.

Departamento de Biología Vegetal y Ecología, Facultad de Biología, Universidad de Sevilla, 1095, 41080, Sevilla, Spain.

A 45-days long climatic chamber experiment was design to evaluate the effect of 400 and 700 ppm atmospheric CO treatments with and without soil water logging in combination with 171 and 510 mM NaCl in the halophyte Salicornia ramosissima. In order to ascertain the possible synergetic impact of these factors associate to climatic change in this plant species physiological and growth responses. Our results indicated that elevated atmospheric CO concentration improved plant physiological performance under suboptimal root-flooding and saline conditions plants. Read More

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December 2018

Identification of the full 26 cytochrome P450 (CYP) genes and analysis of their expression in response to benzo[α]pyrene in the marine rotifer Brachionus rotundiformis.

Comp Biochem Physiol Part D Genomics Proteomics 2018 Dec 4;29:185-192. Epub 2018 Dec 4.

Department of Biological Science, College of Science, Sungkyunkwan University, Suwon 16419, South Korea. Electronic address:

Cytochrome P450s (CYPs) are a large gene superfamily that are found in all living organisms. CYPs have a key role in detoxification of xenobiotics and endogenous chemicals. Although aquatic invertebrate CYPs and their detoxification mechanisms have been reported, little is known about interspecific comparison of CYPs and their detoxification mechanism in the rotifer Brachionus spp. Read More

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December 2018

Fourteen-year trajectories of posttraumatic stress disorder (PTSD) symptoms in UK military personnel, and associated risk factors.

J Psychiatr Res 2018 Nov 30;109:156-163. Epub 2018 Nov 30.

King's Centre for Military Health Research, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK. Electronic address:

The aim of this study was to examine trajectories of posttraumatic stress disorder (PTSD) symptoms over a 14-year period and the risk factors associated with each trajectory. 1885 UK military personnel provided information at four time points since 2002. The PTSD Check list-Civilian Version (PCL-C) was used at all time points. Read More

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November 2018

Effects of hypoxia-reoxygenation stress on mitochondrial proteome and bioenergetics of the hypoxia-tolerant marine bivalve Crassostrea gigas.

J Proteomics 2018 Dec 11. Epub 2018 Dec 11.

Department of Marine Biology, University of Rostock, Rostock, Germany; Department of Maritime Systems, Interdisciplinary Faculty, University of Rostock, Rostock, Germany.

Mitochondria are key intracellular targets of hypoxia-reoxygenation (H/R) stress due to their central role in generation of ATP and reactive oxygen species (ROS). Intertidal oysters Crassostrea gigas are adapted to frequent H/R cycles and maintain aerobic function despite frequent oxygen fluctuations. To gain insight into the molecular mechanisms of H/R tolerance, we assessed changes in mitochondrial respiration and (phospho)proteome of C. Read More

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December 2018

Interaction between three marine microalgae and two phthalate acid esters.

Ecotoxicol Environ Saf 2018 Dec 11;170:407-411. Epub 2018 Dec 11.

School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, PR China.

Three marine microalgae were exposed to diethyl phthalate (DEP) and di-n-butyl phthalate (DBP) to investigate interactions between the algae and the pollutants. The 96-h 50% effect concentration (EC) and no observed effect concentration (NOEC) based on cell density or chlorophyll a were in the order of Chaetoceros muelleri >Cylindrotheca closterium > Dunaliella salina for DEP, and C. closterium > C. Read More

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December 2018

Vertical distributions of mercury in marine sediment cores from central and southern part of Bohai Sea, China.

Ecotoxicol Environ Saf 2018 Dec 11;170:399-406. Epub 2018 Dec 11.

National Marine Environmental Monitoring Center, Linghe Street 42, Dalian City, Liaoning Province 116023, China.

In past decades, China has experienced substantial economic growth and industrialization. However, the effects of vast development of China on Hg input to the nearby oceans are still unclear. In this study, four representative 210Pb-dated sediment cores were collected in the central and southern part of Bohai sea to investigate vertical changes of Hg contents and explore the relationship between the Hg deposition and pollution history in this region utilizing a large amount of information available. Read More

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December 2018

Diversification of the genus Apogon (Lacepède, 1801) (Apogonidae: Perciformes) in the tropical eastern Pacific.

Mol Phylogenet Evol 2018 Dec 11. Epub 2018 Dec 11.

Laboratorio de Biología Acuática, Facultad de Biología, Universidad Michoacana de San Nicolás de Hidalgo, Edificio "R" planta baja, Ciudad Universitaria, Morelia, Michoacán, 58030, México; Laboratorio Nacional de Análisis y Síntesis Ecológica para la Conservación de Recursos Genéticos de México, Escuela Nacional de Estudios Superiores, Unidad Morelia, Universidad Nacional Autónoma de México, Apartado Postal 27-3 (Xangari), 58089, Morelia, Michoacán, México.

We examined the role of geographic barriers and historical processes on the diversification of Apogon species within the tropical eastern Pacific (TEP). Mitochondrial and nuclear DNA sequences were used in Bayesian and Maximum likelihood analyses to generate a phylogenetic hypothesis for Apogon species. Bayesian inferences were used to date the cladogenetic events. Read More

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December 2018

Linking biodiversity to ecosystem services supply: Patterns across aquatic ecosystems.

Sci Total Environ 2018 Dec 3;657:517-534. Epub 2018 Dec 3.

Department of Biology & CESAM, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal.

Global initiatives have been increasingly focusing on mainstreaming the values of biodiversity and ecosystem services into decision-making at all levels. Due to the accelerated rate at which biodiversity is declining and its consequences for the functioning of ecosystems and subsequently, the services they provide, there is need to develop comprehensive assessments of the services and the benefits nature delivers to society. Based on expert evaluation, we identified relevant flow linkages in the supply-side of the socio-ecological system, i. Read More

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December 2018
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Integrated chemical exposure assessment of coastal green turtle foraging grounds on the Great Barrier Reef.

Sci Total Environ 2018 Nov 22;657:401-409. Epub 2018 Nov 22.

Queensland Alliance for Environmental Health Sciences (QAEHS), The University of Queensland, 20 Cornwall St, Woolloongabba, Qld 4102, Australia.

The Great Barrier Reef receives run-off from 424,000 km catchment area across coastal Queensland, incorporating diffuse agricultural run-off, and run-off point sources of land-based chemical pollutants from urban and industrial development. Marine biota, such as green turtles (Chelonia mydas), are exposed to these diverse chemical mixtures in their natural environments, and the long term effects on turtle and ecosystem health remain unknown. This study was part of a larger multi-disciplinary project characterising anthropogenic chemical exposures from the marine environment and turtle health. Read More

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November 2018

Recent insights on uncertainties present in integrated catchment water quality modelling.

Water Res 2018 Dec 5;150:368-379. Epub 2018 Dec 5.

Pennine Water Group, Department of Civil & Structural Engineering, University of Sheffield, Mappin Street, Sheffield, S1 3JD, UK.

This paper aims to stimulate discussion based on the experiences derived from the QUICS project (Quantifying Uncertainty in Integrated Catchment Studies). First it briefly discusses the current state of knowledge on uncertainties in sub-models of integrated catchment models and the existing frameworks for analysing uncertainty. Furthermore, it compares the relative approaches of both building and calibrating fully integrated models or linking separate sub-models. Read More

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December 2018

Biologically synthesized copper oxide nanoparticles enhanced intracellular damage in ciprofloxacin resistant ESBL producing bacteria.

Microb Pathog 2018 Dec 11. Epub 2018 Dec 11.

School of Chemistry & Chemical Engineering, Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, Anhui University, Hefei, Anhui 230601, PR China. Electronic address:

Copper oxide nanoparticles (CuO NPs) were synthesized biologically using leaf extract of Camilla japonica. The typical UV-visible spectral peak of CuO NPs was observed at a wavelength of ∼290 nm, which confirmed their successful synthesis. From scanning electron microscope (SEM) and transmission electron microscope (TEM) analyses, the synthesized CuO NPs were found to possess spherical shape. Read More

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December 2018

Deletion the C-terminal peptides of Vibrio harveyi phospholipase D significantly improved its enzymatic properties.

Int J Biol Macromol 2018 Dec 11. Epub 2018 Dec 11.

School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China. Electronic address:

A novel phospholipase D that originate from marine Vibrio harveyi (VhPLD) was recombinant expressed and biochemically characterized. Moreover, effects of C-terminal peptides on catalytic and interfacial binding properties of VhPLD were investigated by constructing two truncated mutants (VhPLD-Δ(472-483) and VhPLD-Δ(437-483)). Optimal reaction temperature and pH value for wild-type VhPLD (VhPLD-WT) was 45 °C and pH 8. Read More

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December 2018

Identification and immune-related analysis of SNPs in Litopenaeus vannamei Toll3 receptor.

Immunol Lett 2018 Dec 11. Epub 2018 Dec 11.

Department of Biology and Guangdong Provincial Key Laboratory of Marine Biotechnology, Shantou University, Shantou, 515063, China. Electronic address:

Tolls and Toll-like receptors (TLRs), as innate immune-recognition receptors that recognize molecular patterns associated with microbial pathogens, play a critical role in antimicrobial immune responses. Here, we report on single nucleotide polymorphisms (SNPs) of Litopenaeus vannamei Toll3 (LvToll3). Multiple sequence alignment of the L. Read More

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December 2018

Strategies in scheduling marine protected area establishment in a network system.

Ecol Appl 2018 Dec 14. Epub 2018 Dec 14.

ARC Centre of Excellence for Coral Reef Studies, James Cook University, Townsville, Queensland, Australia.

Instantaneous implementation of systematic conservation plans at regional scales is rare. More typically, planned actions are applied incrementally over periods of years or decades. During protracted implementation, the character of the connected ecological system will change as a function of external anthropogenic pressures, local metapopulation processes, and environmental fluctuations. Read More

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December 2018

Coral-dwelling fish moderate bleaching susceptibility of coral hosts.

PLoS One 2018 14;13(12):e0208545. Epub 2018 Dec 14.

Marine Biology and Aquaculture, College of Science and Engineering, James Cook University, Townsville QLD, Australia.

Global environmental change has the potential to disrupt well established species interactions, with impacts on nutrient cycling and ecosystem function. On coral reefs, fish living within the branches of coral colonies can promote coral performance, and it has been hypothesized that the enhanced water flow and nutrients provided by fish to corals could ameliorate coral bleaching. The aim of this study was to evaluate the influence of small, aggregating damselfish on the health of their host corals (physiology, recovery, and survival) before, during, and after a thermal-bleaching event. Read More

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December 2018

Phenology of Trichodesmium spp. blooms in the Great Barrier Reef lagoon, Australia, from the ESA-MERIS 10-year mission.

PLoS One 2018 14;13(12):e0208010. Epub 2018 Dec 14.

Commonwealth Scientific and Industrial Research Organization (CSIRO), Canberra, Australia.

Trichodesmium, a filamentous bloom-forming marine cyanobacterium, plays a key role in the biogeochemistry of oligotrophic ocean regions because of the ability to fix nitrogen. Naturally occurring in the Great Barrier Reef (GBR), the contribution of Trichodesmium to the nutrient budget may be of the same order as that entering the system via catchment runoff. However, the cyclicity of Trichodesmium in the GBR is poorly understood and sparsely documented because of the lack of sufficient observations. Read More

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December 2018

Capsular polysaccharide of Streptococcus agalactiae is an essential virulence factor for infection in Nile tilapia (Oreochromis niloticus Linn.).

J Fish Dis 2018 Dec 14. Epub 2018 Dec 14.

Core Facility for Cell Biology, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, China.

Streptococcus agalactiae (Group B Streptococcus, GBS) is associated with diverse diseases in aquatic animals. The capsule polysaccharide (CPS) encoded by the cps gene cluster is the major virulence factor of S. agalactiae; however, limited information is available regarding the pathogenic role of the CPS of serotype Ia piscine GBS strains in fish. Read More

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December 2018

Bayesian latent class analysis of ELISA and RT-rPCR diagnostic accuracy for subclinical Renibacterium salmoninarum infection in Atlantic salmon (Salmo salar) broodstock.

J Fish Dis 2018 Dec 14. Epub 2018 Dec 14.

Marine Harvest Canada, Campbell River, British Columbia, Canada.

Renibacterium salmoninarum infection causes bacterial kidney disease (BKD) in salmonid freshwater and saltwater life stages, with potentially severe financial loss for the aquaculture industry. Preventing vertical transmission, from infected broodstock to eggs, is key to disease management. As there is no perfect reference standard for detecting R. Read More

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December 2018

Synthesis and Biological Evaluation of σ1 Receptor Ligands Based on Phenyl-1,2,4-oxadiazole Derivatives.

Chem Biodivers 2018 Dec 13. Epub 2018 Dec 13.

Huazhong University of Science and Technology, College of Life Science and Technology, luoyu road 1037, 430074, wuhan, CHINA.

In this study, a series of phenyl-1,2,4-oxadiazole derivatives was synthesized and evaluated for anti-allodynic activity. Structure activity relationship studies identified compound 39 with excellent affinity for the σ1 receptor and selectivity for the σ2 receptor, with poor activity to other central nervous system neurotransmitter receptors and transporters associated with pain. Compound 39 exhibited dose-dependent efficacy in suppressing the formalin-induced flinching and attenuating mechanical allodynia in chronic constriction injury-induced neuropathic rats. Read More

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December 2018

The ventilation mechanism of the Pacific hagfish Eptatretus stoutii.

J Fish Biol 2018 Dec 13. Epub 2018 Dec 13.

Department of Zoology, University of British Columbia, Vancouver, BC, Canada.

We made anatomical and physiological observations of the breathing mechanisms in Pacific hagfish Eptatretus stoutii, with measurements of nostril flow and pressure, mouth and pharyngo-cutaneous duct (PCD) pressure and velum and heart impedance and observations of dye flow patterns. Resting animals frequently exhibit spontaneous apnea. During normal breathing, water flow is continuous at a high rate (~125 ml kg min at 12°C) powered by a two-phase unidirectional pumping system with a fast suction pump (the velum, ~ 22 min ) for inhalation through the single nostril and a much slower force pump (gill pouches and PCD ~ 4. Read More

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December 2018

Estimating contributions of pelagic and benthic pathways to consumer production in coupled marine food webs.

J Anim Ecol 2018 Nov 22. Epub 2018 Nov 22.

School of Natural and Environmental Sciences, Newcastle University, Newcastle Upon Tyne, UK.

Pelagic and benthic systems usually interact, but their dynamics and production rates differ. Such differences influence the distribution, reproductive cycles, growth rates, stability and productivity of the consumers they support. Consumer preferences for, and dependence on, pelagic or benthic production are governed by the availability of these sources of production and consumer life history, distribution, habitat, behavioural ecology, ontogenetic stage and morphology. Read More

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November 2018

Inhibition of Hepatitis C replication by targeting the molecular chaperone Hsp90 - synthesis and biological evaluation of 4,5,6,7-tetrahydrobenzo[1,2-d]thiazole derivatives.

ChemMedChem 2018 Dec 13. Epub 2018 Dec 13.

University of Helsinki, Centre for Drug Research, Division of Pharmaceutical Biosciences, Viikinkaari 4, 00014, Helsinki, FINLAND.

Cellular chaperones that belong to the heat-shock protein 90 (Hsp90) family are a prerequisite for successful viral propagation for most viruses. The hepatitis C virus (HCV) uses Hsp90 for maturation, folding and modification of viral proteins. Based on our previous discovery that marine alkaloid analogues with 4,5,6,7-tetrahydrobenzo[1,2-d]thiazole-2-amine structure show inhibition of HCV replication and potential binding to Hsp90, a series of twelve novel compounds based on this scaffold was designed and synthesized. Read More

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December 2018

Developing a list of invasive alien species likely to threaten biodiversity and ecosystems in the European Union.

Glob Chang Biol 2018 Dec 12. Epub 2018 Dec 12.

Environment Agency Austria, Vienna, Austria.

The European Union (EU) has recently published its first list of invasive alien species (IAS) of EU concern to which current legislation must apply. The list comprises species known to pose great threats to biodiversity and needs to be maintained and updated. Horizon scanning is seen as critical to identify the most threatening potential IAS that do not yet occur in Europe to be subsequently risk assessed for future listing. Read More

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December 2018

Infection by invasive parasites increases susceptibility of native hosts to secondary infection via modulation of cellular immunity.

J Anim Ecol 2018 Dec 13. Epub 2018 Dec 13.

AWI Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Wadden Sea Station Sylt, Hafenstraße 43, D-25992, List/Sylt, Germany.

1.Parasite spillover from invasive aliens to native species increases the risk of disease emergence within native biota - either by direct harm to the new host or by indirect effects like increased risks of secondary infection. 2. Read More

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December 2018

Radial Glia in Echinoderms.

Dev Neurobiol 2018 Dec 12. Epub 2018 Dec 12.

University of North Florida, Jacksonville, FL.

Radial glial cells are crucial in vertebrate neural development and regeneration. It has been recently proposed that this neurogenic cell type might be older than the chordate lineage itself and might have been present in the last common deuterostome ancestor. Here, we summarize the results of recent studies on radial glia in echinoderms, a highly regenerative phylum of marine invertebrates with shared ancestry to chordates. Read More

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December 2018

Poly-allylamine hydrochloride and fucoidan-based self-assembled polyelectrolyte complex nanoparticles for cancer therapeutics.

J Biomed Mater Res A 2018 Dec 12. Epub 2018 Dec 12.

College of Materials Science and Engineering, Huaqiao University, Xiamen, Fujian, 361021, People's Republic of China.

Herein, we fabricated the novel drug delivery system based on the self-assembly of two polyelectrolytes, poly-allylamine hydrochloride (PAH) and fucoidan, as the polycation and polyanion, respectively, under mild conditions for cancer therapeutics. Furthermore, the designed polyelectrolyte complex nanoparticles as well as the methotrexate (MTX) disodium salt-loaded composites were systematically characterized using various techniques. The MTX loading in the nanoparticles was confirmed by zeta potential values that changed from -36. Read More

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December 2018

Brominated diphenyl ethers including a new tribromoiododiphenyl ether from the Vietnamese marine sponge Arenosclera sp. and their antibacterial activities.

Chem Biodivers 2018 Dec 12. Epub 2018 Dec 12.

University of Toyama, Institute of Natural Medicine, 2330-Sugitani, Not Available, 930-0194, Toyama, JAPAN.

A new tribromoiododiphenyl ether (1) and eight known brominated diphenyl ethers (2-9) were isolated from the MeOH extract of the sponge Arenosclera sp. collected in Vietnam, using repeated open column chromatography and preparative thin layer chromatography. The chemical structure of the new compound was determined by analyses of spectroscopic (1D- and 2D-NMR, and MS) data and by comparison of our data with those reported in the literature. Read More

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December 2018

Factor Structure and Psychometric Properties of the Peritraumatic and Posttraumatic Emotions Questionnaires Among Active-Duty Military Personnel With Posttraumatic Stress Disorder.

J Trauma Stress 2018 Dec 12. Epub 2018 Dec 12.

Department of Psychiatry and Behavioral Sciences, Duke University Medical Center, Durham, North Carolina, USA.

The Peritraumatic Emotions Questionnaire (Peri-TEQ) and Posttraumatic Emotions Questionnaire (Post-TEQ) are self-report measures of emotions experienced during and after a traumatic event, respectively. The factor structure and psychometric properties of the Peri- and Post-TEQ were investigated among 474 military personnel with posttraumatic stress disorder (PTSD) following deployment. Exploratory factor analysis and confirmatory factor analysis were conducted to test the factor structure of the scales. Read More

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December 2018

A fundamental difference between macrobiota and microbial eukaryotes: Protistan plankton has a species maximum in the freshwater-marine transition zone of the Baltic Sea.

Environ Microbiol 2018 Dec 10. Epub 2018 Dec 10.

University of Technology Kaiserslautern, Ecology Group, 67663, Kaiserslautern, Germany.

Remane's Artenminimum at the horohalinicum is a fundamental concept in ecology to describe and explain the distribution of organisms along salinity gradients. However, a recent metadata analysis challenged this concept for protists, proposing a species maximum in brackish waters. Due to data bias, this literature-based investigation was highly discussed. Read More

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December 2018

Transcriptional response of the obligate anaerobe Desulfuribacillus stibiiarsenatis MLFW-2 to growth on antimonate and other terminal electron acceptors.

Environ Microbiol 2018 Dec 10. Epub 2018 Dec 10.

Department of Marine Sciences, University of Georgia, Athens, GA, USA, 30602.

Enzymes of the dimethyl sulfoxide reductase (DMSOR) family catalyze two-electron redox reactions pivotal to the dissimilatory metabolism of a variety of organic and inorganic compounds. The draft genome of the obligately anaerobic bacterium Desulfuribacillus stibiiarsenatis MLFW-2 contains 14 genes that are predicted to encode catalytic subunits of DMSOR family enzymes. We quantified transcription of these genes during growth on antimonate, arsenate, nitrate and selenate, with the goal of identifying the respiratory antimonate reductase. Read More

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December 2018

A metatranscriptomics-based assessment of small-scale mixing of sulfidic and oxic waters on redoxcline prokaryotic communities.

Environ Microbiol 2018 Dec 10. Epub 2018 Dec 10.

Leibniz Institute for Baltic Sea Research Warnemünde (IOW), Biological Oceanography, Seestr. 15, D-18119, Rostock, Germany.

Lateral intrusions of oxygen caused by small-scale mixing are thought to shape microbial activity in marine redoxclines. To examine the response of prokaryotes to such mixing events we employed a shipboard mixing experiment in the euxinic central Baltic Sea: oxic, nitrate containing and sulfidic water samples without detectable oxygenized substances were incubated directly or after mixing. While nitrate, nitrite and ammonium concentrations stayed approximately constant in all incubations, we observed a decrease of sulfide after the contact with oxygen in the sulfide containing incubations. Read More

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December 2018

Temporal trends of persistent organic pollutants in Barents Sea polar bears (Ursus maritimus) in relation to changes in feeding habits and body condition.

Environ Sci Technol 2018 Dec 14. Epub 2018 Dec 14.

Temporal trends of persistent organic pollutants (POPs: PCBs, OH-PCBs, p,p'-DDE, HCB, β-HCH, oxychlordane, BDE-47 and 153) in relation to changes in feeding habits and body condition in adult female polar bears (Ursus maritimus) from the Barents Sea subpopulation were examined over 20 years (1997-2017). All 306 samples were collected in the spring (April). Both stable isotope values of nitrogen (δ15N) and carbon (δ13C) from red blood cells declined over time, with a steeper trend for δ13C between 2012 and 2017, indicating a decreasing intake of marine and high trophic level prey items. Read More

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December 2018

Biosynthesis of an anti-tuberculosis sesterterpenoid asperterpenoid A.

Org Biomol Chem 2018 Dec 14. Epub 2018 Dec 14.

Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy/Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China.

A putative three-gene cluster for asperterpenoid A was identified. Step-wise reconstitution of this gene cluster in Aspergillus oryzae reveals that astC encodes a sesterterpene cyclase to synthesize preasperterpenoid A, which is dually oxidized by a P450 enzyme AstB to give asperterpenoid A along with a minor product asperterpenoid B, and asperterpenoid A is further oxidized by another P450 eznyme AstA to afford a new sesterterpenoid asperterpenoid C. Unexpectedly, asperterpenoids A and B, but not the final product asperterpenoid C, exhibit potent inhibitory activity against Mycobacterium tuberculosis protein tyrosine phosphatase B with IC50 values of 3-6 μM. Read More

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December 2018

Daphnia galeata responds to the exposure to an ichthyosporean gut parasite by down-regulation of immunity and lipid metabolism.

BMC Genomics 2018 Dec 14;19(1):932. Epub 2018 Dec 14.

Leibniz Institute of Freshwater Ecology and Inland Fisheries (IGB), Berlin, Germany.

Background: Regulatory circuits of infection in the emerging experimental model system, water flea Daphnia and their microparasites, remain largely unknown. Here we provide the first molecular insights into the response of Daphnia galeata to its highly virulent and common parasite Caullerya mesnili, an ichthyosporean that infects the gut epithelium. We generated a transcriptomic dataset using RNAseq from parasite-exposed (vs. Read More

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December 2018

Concentration and Human Health Implications of Trace Metals in Fish of Economic Importance in Lagos Lagoon, Nigeria.

J Health Pollut 2017 Mar 29;7(13):66-72. Epub 2017 Mar 29.

Department of Food Science and Technology, Ebonyi State University, Abakaliki, Nigeria.

Background: The most significant sources of food-borne diseases are microbiological and chemical hazards. The health risk due to consumption of food from aquatic ecosystems contaminated with hazardous chemicals including metals has increased globally, especially in developing countries like Nigeria.

Objectives: The concentration and human health implications of trace metals in fish of economic importance in Lagos lagoon were investigated by determining the degree of contamination with heavy metals of selected fish from Lagos lagoon and assessing the possible health risks associated with fish consumption. Read More

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Use of Agricultural Wastes for the Immobilization of Metals in Polluted Soils in Lagos State, Nigeria.

J Health Pollut 2017 Mar 29;7(13):56-64. Epub 2017 Mar 29.

Nigerian Institute for Oceanography and Marine Research, Lagos Nigeria.

Background: An increase in human and industrial activities has led to an increase in the pollution of soils by metals. If these metals become bioavailable, there is potential for human exposure, leading to possible health effects. Remediation of soils is important to ensure that soil is suitable for agricultural purposes. Read More

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March 2017
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Metallothionein and Glutathione Content as Biomarkers of Metal Pollution in Mussels and Local Fishermen in Abu Qir Bay, Egypt.

J Health Pollut 2016 Dec 21;6(12):50-60. Epub 2017 Feb 21.

Applied Medical Chemistry, Medical Research Institute, Alexandria University, Egypt.

Background: When heavy metals accumulate in air, soil, and water, the risk of human exposure increases among industrial workers, as well as in people living near polluted areas. Heavy metals adversely affect a variety of bodily systems such as the cardiovascular, respiratory, endocrine, immune, and reproductive systems. In addition, long-term exposure and accumulation of heavy metals in the body may disturb oxidative stress genes and thus increase the susceptibility to various diseases. Read More

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December 2016

Levels of Polychlorinated Biphenyls in Plastic Resin Pellets from Six Beaches on the Accra-Tema Coastline, Ghana.

J Health Pollut 2016 Sep 13;6(11):9-17. Epub 2016 Sep 13.

School of Basic and Biomedical Sciences, University of Health and Allied Sciences, PMB 31 Ho, Volta Region, Ghana.

Background: Polychlorinated biphenyls (PCBs) are organic compounds, known to be carcinogenic and banned by the Stockholm Convention. PCBs are hydrophobic substances able to accumulate in organic materials, including plastic pellets. Plastic resin pellets are industrial raw materials that are remolded finished products for industrial and domestic use, commonly used for packaging. Read More

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September 2016

Urinary Metal Levels in a Chilean Community 31 Years After the Dumping of Mine Tailings.

J Health Pollut 2016 Jun 16;6(10):19-27. Epub 2016 Jun 16.

Departamento de Salud Pública, Pontificia Universidad Católica de Chile, Santiago, Chile.

Background: Between 1938 and 1975, the city of Chañaral, located in the north of Chile, received 200 megatons of unregulated mining waste, which created an artificial beach 10 kilometers long and covering an area larger than 4 km. In 1983, this deposit was classified as a serious case of marine pollution in the Pacific Ocean, according to the Organization for Economic Cooperation and Development. In 1989, dumping ceased due to a judicial order. Read More

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Multiplex PCR for the rapid detection of insulin-like growth factor in the Pacific oyster, Crassostrea gigas: a useful indicator for growth assessment.

Mol Biol Rep 2018 Dec 13. Epub 2018 Dec 13.

Department of Marine Bio-Materials & Aquaculture, Pukyong National University, Busan, 48513, South Korea.

Insulin-like growth factor (IGF) expression plays a critical role in the endocrine regulation of proliferation, differentiation, and growth in shellfish as well as in fish. The Pacific oyster, Crassostrea gigas, is a significant aquaculture species that comprises a large percentage of the Korean shellfish industry; moreover, its growth is economically important in aquaculture. However, when measuring the growth rate in shellfish, the soft tissue weight is difficult to determine because of the shell weight. Read More

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December 2018

Spatial and temporal heterogeneity in the structure and function of sediment bacterial communities of a tropical mangrove forest.

Environ Sci Pollut Res Int 2018 Dec 13. Epub 2018 Dec 13.

Wetland Research and Training Centre, Chilika Development Authority, Balugaon, Odisha, 752030, India.

Bacterial communities of mangrove sediments are well appreciated for their role in nutrient cycling. However, spatiotemporal variability in these communities over large geographical scale remains understudied. We investigated sediment bacterial communities and their metabolic potential in an intertidal mangrove forest of India, Bhitarkanika, using high-throughput sequencing of 16S rRNA genes and community-level physiological profiling. Read More

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December 2018

Combined effects of flow speed and sub-lethal insecticide exposure on predator-prey interactions between the California killifish and an infaunal polychaete.

Ecotoxicology 2018 Dec 13. Epub 2018 Dec 13.

Department of Biology and Coastal and Marine Institute, San Diego State University, 5500 Campanile Drive, San Diego, CA, 92182-4614, USA.

Hydrodynamics and pollution affect estuarine populations, but their ecological effects have rarely been studied in combination. We conducted two laboratory experiments to quantify whether predator-prey interactions between California killifish, Fundulus parvipinnis, and the polychaete Polydora cornuta vary with flow speed and chlorpyrifos exposure. In one experiment, only F. Read More

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December 2018

Early Hereditary Diffuse Gastric Cancer (eHDGC) is Characterized by Subtle Genomic Instability and Active DNA Damage Response.

Pathol Oncol Res 2018 Dec 13. Epub 2018 Dec 13.

Division of Biomedical Science and Biochemistry, Research School of Biology, ANU College of Medicine, Biology and Environment, Australian National University, P.O. Box: 2601, Canberra, Australia.

Diffuse gastric cancer (DGC) is one of the two primary types of stomach cancer. Carriers of germline mutations in the gene encoding E-cadherin are predisposed to DGC. The primary aim of the present study was to determine if genomic instability is an early event in DGC and how it may lead to disease progression. Read More

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December 2018
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A thermostable trypsin from freshwater fish Japanese dace (Tribolodon hakonensis): a comparison of the primary structures among fish trypsins.

Fish Physiol Biochem 2018 Dec 13. Epub 2018 Dec 13.

Laboratory of Marine Chemical Resource Development, Faculty of Fisheries Sciences, Hokkaido University, Hakodate, Hokkaido, 041-8611, Japan.

Trypsin from Japanese dace (Tribolodon hakonensis) (JD-T) living in freshwater (2-18 °C) was purified. JD-T represented typical fish trypsin characteristics regarding the effects of protease inhibitor, calcium-ion, and pH. For the effect of temperature, JD-T quite resembled to the trypsins from tropical-zone marine fish and freshwater fish (the catfish cultured in Thailand), i. Read More

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December 2018

Extremely thermoactive archaeal endoglucanase from a shallow marine hydrothermal vent from Vulcano Island.

Appl Microbiol Biotechnol 2018 Dec 13. Epub 2018 Dec 13.

Institute of Technical Microbiology, University of Technology, Hamburg, Germany.

Already-characterized microbial cellulases have proven to be highly useful for industrial processes, since they can withstand harsh industrial conditions with characteristics such as high thermo- and acid stability. These properties provide promising features for the process of plant biomass degradation and biofuel generation. Nevertheless, the number of known extremely thermoactive archaeal cellulases is low. Read More

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December 2018

A nanocrystalline monoclinic CaCO precursor of metastable aragonite.

Sci Adv 2018 Dec 12;4(12):eaau6178. Epub 2018 Dec 12.

Institute of Geology, University of Innsbruck, Innrain 52, Innsbruck 6020, Austria.

Despite its thermodynamical metastability at near-surface conditions, aragonite is widespread in marine and terrestrial sediments. It abundantly forms in living organisms, and its abiotic formation is favored in waters of a Mg/Ca ratio > 1.5. Read More

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December 2018