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https://www.readbyqxmd.com/read/29783169/applying-multi-criteria-analysis-for-preliminary-assessment-of-the-properties-of-alginate-immobilized-myriophyllum-spicatum-in-lake-water-samples
#1
Jelena V Milojković, Jelena B Popović-Djordjević, Lato L Pezo, Ilija D Brčeski, Aleksandar Ž Kostić, Vladan D Milošević, Mirjana D Stojanović
The preliminary assessment of the properties of alginate immobilized aquatic weed Myriophyllum spicatum beads-MsAlg in a multi-element system of nine Serbian lakes water samples was done. Herein, the results obtained in the biosorption experiment with MsAlg contents of twenty-two elements analysed by inductively coupled plasma-optical emission spectrometry, biosorption capacity, element removal efficiency, total hardness (TH) and quality index of water (WQI) are presented. Scanning electron microscopy with energy dispersive X-ray spectroscopy was used for the characterization of M...
May 11, 2018: Water Research
https://www.readbyqxmd.com/read/29783136/occurrence-and-estrogenic-activity-of-steroid-hormones-in-chinese-streams-a-nationwide-study-based-on-a-combination-of-chemical-and-biological-tools
#2
Bo Yao, Rui Li, Shuwen Yan, Shen-An Chan, Weihua Song
Steroid hormones (SHs) are continuously released into the aquatic environment through various pathways after being excreted by humans and animals, interfere with the normal function of the endocrine system and may affect the physiology and reproduction of exposed aquatic life. To conduct a nationwide investigation of the occurrence and biological effects of SHs in surface river/steam water in China, we quantitated 27 selected SHs in 217 surface water samples by solid-phase extraction (SPE) tandem LC-MS/MS and used a recombinant yeast estrogen assay to screen extracts of the water samples for estrogenic activities...
May 18, 2018: Environment International
https://www.readbyqxmd.com/read/29783116/modelling-environment-contamination-with-heavy-metals-in-flathead-grey-mullet-mugil-cephalus-and-upper-sediments-from-north-african-coasts-of-the-mediterranean-sea
#3
Naouel Ouali, Bourhane-Eddine Belabed, Haroun Chenchouni
Heavy metals are a serious hazard for aquatic ecosystems and human health. They negatively affect aquatic life functioning through accumulation resulting physiological/growth disturbances in aquatic lifeforms. This survey focused on the assessment of heavy metal pollution in the Gulf of Annaba (northeastern Algeria), the largest and most diversified industrial hub in Africa, using a multi-compartment approach (water-sediment-biota). The study aims to characterize the spatiotemporal variation of trace metal (TM) contamination and its effects on the growth of the Flathead grey mullet (Mugil cephalus)...
May 18, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29782800/suspect-screening-and-regulatory-databases-a-powerful-combination-to-identify-emerging-micropollutants
#4
Pablo Gago-Ferrero, Agnes Krettek, Stellan Fischer, Karin Wiberg, Lutz Ahrens
This study demonstrates that regulatory databases combined with the latest advances in high resolution mass spectrometry (HRMS) can be efficiently used to prioritize and identify new, potentially hazardous pollutants being discharged into the aquatic environment. Of the approximately 23,000 chemicals registered in the database of the National Swedish Product Register, 160 potential organic micropollutants were prioritized through quantitative knowledge of market availability, quantity used, extent of use on the market, and predicted compartment-specific environmental exposure during usage...
May 21, 2018: Environmental Science & Technology
https://www.readbyqxmd.com/read/29782522/molecular-detection-of-mycobacterium-ulcerans-in-the-environment-and-its-relationship-with-buruli-ulcer-occurrence-in-zio-and-yoto-districts-of-maritime-region-in-togo
#5
Issaka Maman, Tchadjobo Tchacondo, Abiba Banla Kere, Marcus Beissner, Kossi Badziklou, Ekanao Tedihou, Edith Nyaku, Komi Amekuse, Franz Xaver Wiedemann, Damintoti Simplice Karou, Gisela Bretzel
BACKGROUND: Buruli Ulcer (BU) is a neglected tropical skin infection caused by Mycobacterium ulcerans. Residence near aquatic areas has been identified as an important source of transmission of M. ulcerans with increased risk of contracting Buruli ulcer. However, the reservoir and the mode of transmission are not yet well known. The aim of this study was to identify the presence of M. ulcerans in the environment and its relationship with Buruli ulcer occurrence in Zio and Yoto districts of the maritime region in south Togo...
May 21, 2018: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/29780681/the-swiss-ecotox-centre-bridging-the-gap-between-research-and-application
#6
REVIEW
Inge Werner
The Swiss Centre for Applied Ecotoxicology (Ecotox Centre) was created in recognition of the urgent societal need to provide expertise, education and tools for assessing the risks and effects of anthropogenic chemicals in the environment. Founded in 2008, the Ecotox Centre conducts applied, practice-oriented research in the areas of aquatic (water and sediment) and terrestrial (with focus on soil) ecotoxicology, and provides further education and consulting services to its stakeholders. To date, its most important activities focus on (1) the validation and standardization of bioassays for use in monitoring of water, sediment or soil quality and (2) the development of tools for retrospective risk assessment, including approaches to assess mixture risk...
2018: Environmental Sciences Europe
https://www.readbyqxmd.com/read/29779374/molecularly-imprinted-polymers-for-compound-specific-isotope-analysis-of-polar-organic-micropollutants-in-aquatic-environments
#7
Rani Bakkour, Jakov Bolotin, Börje Sellergren, Thomas B Hofstetter
Compound-specific isotope analysis (CSIA) of polar organic micropollutants in environmental waters requires a processing of large sample volumes to obtain the required analyte masses for analysis by gas chromatography / isotope-ratio mass spectrometry (GC/IRMS). However, the accumulation of organic matter of unknown isotopic composition in standard enrichment procedures currently compromises the accurate determination of isotope ratios. We explored the use of molecularly-imprinted polymers (MIPs) for selective analyte enrichment for 13C/12C and 15N/14N ratio measurements by GC/IRMS using 1H-benzotriazole, a typical corrosion inhibitor in dishwashing detergents, as example of a widely detected polar organic micropollutant...
May 20, 2018: Analytical Chemistry
https://www.readbyqxmd.com/read/29778871/linking-fish-tolerance-to-water-quality-criteria-for-the-assessment-of-environmental-flows-a-practical-method-for-streamflow-regulation-and-pollution-control
#8
Changsen Zhao, Shengtian Yang, Junguo Liu, Changming Liu, Fanghua Hao, Zhonggen Wang, Huitong Zhang, Jinxi Song, Simon M Mitrovic, Richard P Lim
The survival of aquatic biota in stream ecosystems depends on both water quantity and quality, and is particularly susceptible to degraded water quality in regulated rivers. Maintenance of environmental flows (e-flows) for aquatic biota with optimum water quantity and quality is essential for sustainable ecosystem services, especially in developing regions with insufficient stream monitoring of hydrology, water quality and aquatic biota. Few e-flow methods are available that closely link aquatic biota tolerances to pollutant concentrations in a simple and practical manner...
May 15, 2018: Water Research
https://www.readbyqxmd.com/read/29778682/temperature-and-hydrologic-alteration-predict-the-spread-of-invasive-largemouth-bass-micropterus-salmoides
#9
Mi-Jung Bae, Christina A Murphy, Emili García-Berthou
The successful establishment of an aquatic invasive alien species can be mediated by a suite of environmental factors, including climate and anthropogenic disturbance. Dams and reservoirs are thought to promote freshwater fish invasion success through hydrological alterations but the evidence for their role in the global invasion of Largemouth Bass (Micropterus salmoides) on a landscape scale is limited. Here, we examine the distribution of Largemouth Bass, one of the most widely introduced fish in the world, from the Iberian Peninsula using species distribution models (SDMs), including an ensemble forecast...
May 17, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29778442/developmental-profiles-of-progesterone-receptor-transcripts-and-molecular-responses-to-gestagen-exposure-during-silurana-tropicalis-early-development
#10
Paisley Thomson, Valerie S Langlois
Environmental gestagens are an emerging class of contaminants that have been recently measured in surface water and can interfere with reproduction in aquatic vertebrates. Gestagens include endogenous progestogens, such as progesterone (P4), which bind P4-receptors and have critically important roles in vertebrate physiology and reproduction. Gestagens also include synthetic progestins, which are components of human and veterinary drugs, such as melengestrol acetate (MGA). Endogenous progestogens are essential in the regulation of reproduction in mammalian species, but the role of P4 in amphibian larval development remains unclear...
May 17, 2018: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/29778229/a-novel-portable-filtration-system-for-sampling-and-concentration-of-microorganisms-demonstration-on-marine-microalgae-with-subsequent-quantification-using-ic-nasba
#11
Christos-Moritz Loukas, Matthew C Mowlem, Maria-Nefeli Tsaloglou, Nicolas G Green
This paper presents a novel portable sample filtration/concentration system, designed for use on samples of microorganisms with very low cell concentrations and large volumes, such as water-borne parasites, pathogens associated with faecal matter, or toxic phytoplankton. The example application used for demonstration was the in-field collection and concentration of microalgae from seawater samples. This type of organism is responsible for Harmful Algal Blooms (HABs), an example of which is commonly referred to as "red tides", which are typically the result of rapid proliferation and high biomass accumulation of harmful microalgal species in the water column or at the sea surface...
May 2018: Harmful Algae
https://www.readbyqxmd.com/read/29778081/molecular-aspect-of-silver-nanoparticles-regulated-embryonic-development-in-zebrafish-danio-rerio-by-oct-4-expression
#12
Biplab Sarkar, Suresh K Verma, Javed Akhtar, Surya Prakash Netam, Sanjay Kr Gupta, Pritam Kumar Panda, Koel Mukherjee
With the enhancement of commercial manifestation of silver nanoparticles, concerned has risen on their accumulation in aquatic system and consequent effects on fish development and metabolism. In this study, experiments were conducted to assess the impacts of silver nanoparticles on early life cycles of fish considering Zebrafish (Danio rerio) as experimental model. Silver nanoparticles were synthesized through chemical reduction method and characterized through UV-visible spectroscopy, dynamic light scattering (DLS), and HR-TEM...
May 4, 2018: Chemosphere
https://www.readbyqxmd.com/read/29778079/advances-in-understanding-the-response-of-fish-to-linear-alcohols-in-the-environment
#13
Scott E Belanger, Jane M Rawlings, Ricky Stackhouse
Short to long chain alcohols have a range of ecotoxicity to aquatic life driven by hydrophobic interactions with biological membranes. Carbon chain length and octanol:water partitioning coefficients are surrogates for hydrophobicity and strongly relate to aquatic toxicity. In these investigations, the toxicity of ethanol to 1-n-dodecanol to juvenile fish in standard acute toxicity tests is reviewed. Toxicity tests employing fish embryos (zebrafish Danio rerio and fathead minnow Pimephales promelas) in the Fish Embryo Test (OECD 236) format were conducted from C2 to C10 to compare against standard juvenile fish toxicity...
April 25, 2018: Chemosphere
https://www.readbyqxmd.com/read/29778006/environmentally-relevant-concentrations-of-tramadol-and-citalopram-alter-behaviour-of-an-aquatic-invertebrate
#14
M Buřič, K Grabicová, J Kubec, A Kouba, I Kuklina, P Kozák, R Grabic, T Randák
Environmental pollution by pharmaceutically active compounds, used in quantities similar to those of pesticides and other organic micropollutants, is increasingly recognized as a major threat to the aquatic environment. These compounds are only partly removed from wastewaters and, despite their low concentrations, directly and indirectly affect behaviour of freshwater organisms in natural habitats. The aim of this study was to behaviourally assess the effects of an opioid painkiller (tramadol) and antidepressant drug (citalopram) on behaviour patterns of a clonal model species, marbled crayfish...
May 14, 2018: Aquatic Toxicology
https://www.readbyqxmd.com/read/29777932/application-of-a-surfactant-assisted-dispersive-liquid-liquid-microextraction-method-along-with-central-composite-design-for-micro-volume-based-spectrophotometric-determination-of-low-level-of-cr-vi-ions-in-aquatic-samples
#15
Hamid Reza Sobhi, Efat Azadikhah, Mohammad Behbahani, Ali Esrafili, Mahnaz Ghambarian
A fast, simple, low cost surfactant-assisted dispersive liquid-liquid microextraction method along with central composite design for the determination of low level of Cr(VI) ions in several aquatic samples has been developed. Initially, Cr(VI) ions present in the aqueous sample were readily reacted with 1,5‑diphenylcarbazide (DPC) in acidic medium through complexation. Sodium dodecyl sulfate (SDS), as an anionic surfactant, was then employed as an ion-pair agent to convert the cationic complex into the neutral one...
May 9, 2018: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/29777392/determining-representative-ranges-of-point-sensors-in-distributed-networks
#16
John K Horne, Dale A Jacques
Distributed networks of stationary instruments provide high temporal scope (i.e., range/resolution) observations but are spatially limited as a set of point measurements. Measurement similarity between points typically decays with distance, which is used to set interpolation distances. The importance of analyzing spatiotemporal data at equivalent spatial and temporal scales has been identified but no standard procedure is used to interpolate space using temporally-indexed observations. Using concurrent mobile and stationary active acoustic, fish density data from a tidal energy site in Puget Sound, WA, USA, six methods are compared to estimate the range at which stationary measurements can be spatially interpolated...
May 18, 2018: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/29777312/evaluating-organochlorine-pesticide-residues-in-the-aquatic-environment-of-the-lake-naivasha-river-basin-using-passive-sampling-techniques
#17
Yasser Abbasi, Chris M Mannaerts
Passive sampling techniques can improve the discovery of low concentrations by continuous collecting the contaminants, which usually go undetected with classic and once-off time-point grab sampling. The aim of this study was to evaluate organochlorine pesticide (OCP) residues in the aquatic environment of the Lake Naivasha river basin (Kenya) using passive sampling techniques. Silicone rubber sheet and Speedisk samplers were used to detect residues of α-HCH, β-HCH, γ-HCH, δ-HCH, heptachlor, aldrin, heptachlor epoxide, pp-DDE, endrin, dieldrin, α-endosulfan, β-endosulfan, pp-DDD, endrin aldehyde, pp-DDT, endosulfan sulfate, and methoxychlor in the Malewa River and Lake Naivasha...
May 18, 2018: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/29776998/visual-field-shape-and-foraging-ecology-in-diurnal-raptors
#18
Simon Potier, Olivier Duriez, Gregory B Cunningham, Vincent Bonhomme, Colleen O'Rourke, Esteban Fernández-Juricic, Francesco Bonadonna
Birds, particularly raptors, are believed to forage primarily using visual cues. However, raptor foraging tactics are highly diverse - from chasing mobile prey to scavenging - which may reflect adaptations of their visual systems. To investigate this, we studied the visual field configuration of 15 species of diurnal Accipitriformes that differ in such tactics, first focusing on the binocular field and blind area by using a single traits approach, and then exploring the shape of the binocular field with morphometric approaches...
May 18, 2018: Journal of Experimental Biology
https://www.readbyqxmd.com/read/29776546/recent-advances-in-analytical-methods-for-the-determination-of-4-alkylphenols-and-bisphenol-a-in-solid-environmental-matrices-a-critical-review
#19
REVIEW
N Salgueiro-González, S Castiglioni, E Zuccato, I Turnes-Carou, P López-Mahía, S Muniategui-Lorenzo
The problem of endocrine disrupting compounds (EDCs) in the environment has become a worldwide concern in recent decades. Besides their toxicological effects at low concentrations and their widespread use in industrial and household applications, these pollutants pose a risk for non-target organisms and also for public safety. Analytical methods to determine these compounds at trace levels in different matrices are urgently needed. This review critically discusses trends in analytical methods for well-known EDCs like alkylphenols and bisphenol A in solid environmental matrices, including sediment and aquatic biological samples (from 2006 to 2018)...
September 18, 2018: Analytica Chimica Acta
https://www.readbyqxmd.com/read/29776453/dye-residue-analysis-in-raw-and-processed-aquaculture-products-matrix-extension-of-aoac-international-official-method-%C3%A2-2012-25
#20
Wendy C Andersen, Christine R Casey, Tara J Nickel, Susan L Young, Sherri B Turnipseed
Background : Triphenylmethane dyes and metabolites are known or suspected mutagens and areprohibited in animals intended for human consumption. Despite toxicity, triphenylmethane dyes are used illegally as inexpensive treatments for fungal and parasite infections in aquatic animals. Objective: AOAC INTERNTIONAL Official Method ℠ 2012.25 for the LC-MS/MS determination of malachite green, crystal violet, brilliant green, and metabolites leucomalachite green and leucocrystal violet in seafood products was previously validated for finfish (trout, salmon, catfish, and tilapia) and shrimp, but had not been fully validated for other types of aquacultured products such as eel, molluscan shellfish, or frog or for processed seafoods...
May 18, 2018: Journal of AOAC International
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