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https://www.readbyqxmd.com/read/27922184/europium-iii-and-uranium-vi-complexation-by-natural-organic-matter-nom-effect-of-source
#1
Ralf Kautenburger, Jonas M Sander, Christina Hein
For the safe long-term storage of high level radioactive waste (HLW), detailed information about geo-chemical behavior of radioactive and toxic metal ions under environmental conditions is important. Natural organic matter (NOM) can play a crucial role in the immobilization or mobilization of these metal ions due to its complexation and colloid formation tendency. In this study, the complexation of europium (as chemical homologue of trivalent actinides like americium) and uranium (as main component of HLW) by ten humic acids (HA) from different sources and Suwannee NOM river extract has been analyzed...
December 6, 2016: Electrophoresis
https://www.readbyqxmd.com/read/27922128/space-geodetic-monitoring-of-engineered-structures-the-ongoing-destabilization-of-the-mosul-dam-iraq
#2
Pietro Milillo, Roland Bürgmann, Paul Lundgren, Jacqueline Salzer, Daniele Perissin, Eric Fielding, Filippo Biondi, Giovanni Milillo
We present a detailed survey of the ongoing destabilization process of the Mosul dam. The dam is located on the Tigris river and is the biggest hydraulic structure in Iraq. From a geological point of view the dam foundation is poor due to a site geology formed by alternating strata of highly soluble materials including gypsum, anhydrite, marl and limestone. Here we present the first multi-sensor cumulative deformation map for the dam generated from space-based interferometric synthetic aperture radar measurements from the Italian constellation COSMO-SkyMed and the European sensor Sentinel-1a over the period 2014-2016 that we compare to an older dataset spanning 2004-2010 acquired with the European Envisat satellite...
December 6, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27922117/authentication-of-chinese-vintage-liquors-using-bomb-pulse-14-c
#3
Peng Cheng, Weijian Zhou, G S Burr, Yunchong Fu, Yukun Fan, Shugang Wu
The older a bottle of Chinese vintage liquor is, the higher the price it commands. Driven by the potential for higher profits, some newly-founded distilleries openly sell liquor whose storage ages are exaggerated. In China, the market for vintage liquor has become fraught with uncertainty and a pressing need has arisen to establish an effective method to authenticate the age of vintage liquors. A radiocarbon ((14)C) dating method is described here that can verify cellar-stored years of Chinese liquors distilled within the last fifty years...
December 6, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27922016/gabaergic-anxiolytic-drug-in-water-increases-migration-behaviour-in-salmon
#4
Gustav Hellström, Jonatan Klaminder, Fia Finn, Lo Persson, Anders Alanärä, Micael Jonsson, Jerker Fick, Tomas Brodin
Migration is an important life-history event in a wide range of taxa, yet many migrations are influenced by anthropogenic change. Although migration dynamics are extensively studied, the potential effects of environmental contaminants on migratory physiology are poorly understood. In this study we show that an anxiolytic drug in water can promote downward migratory behaviour of Atlantic salmon (Salmo salar) in both laboratory setting and in a natural river tributary. Exposing salmon smolt to a dilute concentration of a GABAA receptor agonist (oxazepam) increased migration intensity compared with untreated smolt...
December 6, 2016: Nature Communications
https://www.readbyqxmd.com/read/27920387/adaptive-capabilities-and-fitness-consequences-associated-with-pollution-exposure-in-fish
#5
REVIEW
Patrick B Hamilton, Gregor Rolshausen, Tamsyn M Uren Webster, Charles R Tyler
Many fish populations are exposed to harmful levels of chemical pollution and selection pressures associated with these exposures have led to the evolution of tolerance. Our understanding of the physiological basis for these adaptations is limited, but they are likely to include processes involved with the absorption, distribution, metabolism and/or excretion of the target chemical. Other potential adaptive mechanisms include enhancements in antioxidant responses, an increased capacity for DNA and/or tissue repair and alterations to the life cycle of fish that enable earlier reproduction...
January 19, 2017: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/27919559/effects-of-flow-regime-on-benthic-algae-and-macroinvertebrates-a-comparison-between-regulated-and-unregulated-rivers
#6
Susanne C Schneider, Zlatko Petrin
Natural fluctuations in flow are important for maintaining the ecological integrity of riverine ecosystems. However, the flow regime of many rivers has been modified. We assessed the impact of water chemistry, habitat and streamflow characteristics on macroinvertebrates and benthic algae, comparing 20 regulated with 20 unregulated sites. Flow regime, calculated from daily averaged discharge over the five years preceding sampling, was generally more stable at regulated sites, with higher relative discharges in winter, lower relative discharges in spring and smaller differences between upper and lower percentiles...
December 2, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27919532/contribution-of-petroleum-derived-organic-carbon-to-sedimentary-organic-carbon-pool-in-the-eastern-yellow-sea-the-northwestern-pacific
#7
Jung-Hyun Kim, Dong-Hun Lee, Suk-Hee Yoon, Kap-Sik Jeong, Bohyung Choi, Kyung-Hoon Shin
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...
December 2, 2016: Chemosphere
https://www.readbyqxmd.com/read/27919530/sources-of-formaldehyde-and-their-contributions-to-photochemical-o3-formation-at-an-urban-site-in-the-pearl-river-delta-southern-china
#8
Z H Ling, J Zhao, S J Fan, X M Wang
Two models (the Positive Matrix Factorization (PMF) model and a photochemical box model with Master Chemical Mechanism (PBM-MCM)) were applied to analyze the formaldehyde (HCHO) data collected in July 2006 at an urban site (GPEMC) in the Pearl River Delta (PRD), southern China. Three major HCHO sources (secondary formation, vehicular exhaust, and solvent usage) were identified and they were found to contribute in average 53%, 31% and 16% respectively to the total HCHO loading at GPEMC. Alkenes was the most important group contributing to the secondary formation of HCHO, followed by aromatics and alkanes...
December 2, 2016: Chemosphere
https://www.readbyqxmd.com/read/27919518/polydopamine-decorated-3d-nickel-foam-for-extraction-of-sixteen-polycyclic-aromatic-hydrocarbons
#9
Ying Cai, Zhihong Yan, Ming Yang, Xiaoying Huang, Weiping Min, Lijia Wang, Qingyun Cai
In this work, polydopamine coated 3D nickel foam (NF-PDA) was prepared and applied as sorbent for the solid phase extraction (SPE) of 16 polycyclic aromatic hydrocarbons (PAHs) from water samples. NF-PDA were synthesized by situ oxidative self-polymerization procedure and characterized by using the techniques of scanning electron microscopy (SEM), energy dispersive spectrum analysis (EDS) and X-ray photoelectron spectroscopy (XPS). Its performance was evaluated by the SPE of 16 PAHs from water samples, followed by gas chromatography-mass spectrometrical (GC-MS) analysis...
November 21, 2016: Journal of Chromatography. A
https://www.readbyqxmd.com/read/27919313/population-dynamics-of-rice-planthoppers-nilaparvata-lugens-and-sogatella-furcifera-hemiptera-delphacidae-in-central-vietnam-and-its-effects-on-their-spring-migration-to-china
#10
G Hu, M-H Lu, H A Tuan, W-C Liu, M-C Xie, C E McInerney, B-P Zhai
Rice planthopper (RPH) populations of Nilaparvata lugens and Sogatella furcifera periodically have erupted across Asia. Predicting RPH population dynamics and identifying their source areas are crucial for the management of these migratory pests in China, but the origins of the migrants to temperate and subtropical regions in China remains unclear. In particular, their early migration to China in March and April have not yet been explored due to a lack of research data available from potential source areas, Central Vietnam and Laos...
December 6, 2016: Bulletin of Entomological Research
https://www.readbyqxmd.com/read/27919163/isotopes-to-assess-sustainability-of-overexploited-groundwater-in-the-souss-massa-system-morocco
#11
Mohammed Hssaisoune, Lhoussaine Bouchaou, Baudelaire N'da, Mouna Malki, Houria Abahous, Alan E Fryar
Groundwater depletion and changes in isotopic and chemical contents constitute the main indicators of overexploitation, recharge, and flow paths in the Souss-Massa aquifer. These indicators highlight processes concerning sustainability of water resources in the aquifer (e.g. surface/groundwater interaction, recharge processes, and marine intrusion). The spatial variation of stable and radioactive isotopic contents indicates a mixing of modern and old water within the system. Recent recharge was observed mainly along the Souss River (the major surface-water drainage in the study area) and in the irrigated areas...
December 5, 2016: Isotopes in Environmental and Health Studies
https://www.readbyqxmd.com/read/27918148/influenza-a-virus-surveillance-in-the-invasive-american-mink-neovison-vison-from-freshwater-ecosystems-northern-spain
#12
H Gholipour, N Busquets, X Fernández-Aguilar, A Sánchez, M P Ribas, G De Pedro, P Lizarraga, O Alarcia-Alejos, C Temiño, O Cabezón
Influenza A viruses (IAVs) are negative-sense, single-stranded and segmented RNA viruses of the Orthomyxoviridae family that may cause acute respiratory disease in a wide range of birds and mammals. Susceptibility of several species within the family Mustelidae to IAVs has been reported as a result of natural or experimental infections. The objectives of this study were to assess whether free-ranging American mink populations from Northern Spain were infected with IAV and try to define the role of this species in the epidemiology of IAV...
December 5, 2016: Zoonoses and Public Health
https://www.readbyqxmd.com/read/27917931/metagenomic-profiling-of-historic-colorado-front-range-flood-impact-on-distribution-of-riverine-antibiotic-resistance-genes
#13
Emily Garner, Joshua S Wallace, Gustavo Arango Argoty, Caitlin Wilkinson, Nicole Fahrenfeld, Lenwood S Heath, Liqing Zhang, Mazdak Arabi, Diana S Aga, Amy Pruden
Record-breaking floods in September 2013 caused massive damage to homes and infrastructure across the Colorado Front Range and heavily impacted the Cache La Poudre River watershed. Given the unique nature of this watershed as a test-bed for tracking environmental pathways of antibiotic resistance gene (ARG) dissemination, we sought to determine the impact of extreme flooding on ARG reservoirs in river water and sediment. We utilized high-throughput DNA sequencing to obtain metagenomic profiles of ARGs before and after flooding, and investigated 23 antibiotics and 14 metals as putative selective agents during post-flood recovery...
December 5, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27917356/response-and-recovery-measures-for-two-floods-in-north-china-during-the-nineteenth-century-a-comparative-study
#14
Yu Ye, Xiuqi Fang, Fan Li
BACKGROUND: The process of human response to natural disasters and its mechanisms as revealed by historical events still has a broad significance for modern society. This study analyzed the disaster relief process and the social response for two floods in China: the Yongding River flood in 1801 and the Yellow River flood in 1841. These two floods reflect the different response processes between the national and provincial capitals during a stage of climate cooling and social transition in the Qing dynasty...
2016: SpringerPlus
https://www.readbyqxmd.com/read/27917353/application-of-the-mike21c-model-to-simulate-flow-in-the-lower-mekong-river-basin
#15
Truong An Dang, Tuan Hoang Tran
Numerical models are useful tools that play an important role in many research projects. Mike21C is one of the most well-established models for simulating a variety of processes, including bank erosion, bed level variations, aggradation, and degradation. Such processes are caused by a variety of activities, such as construction and dredging, as well as seasonal flow fluctuations. Mike21C based on an orthogonal curvilinear grid, which enables a computational speed that is faster than that of other grids. The hydrodynamic part of the model is based on solving the Saint-Venant equations...
2016: SpringerPlus
https://www.readbyqxmd.com/read/27917321/effects-of-arachidonic-acid-supplementation-in-maturation-diet-on-female-reproductive-performance-and-larval-quality-of-giant-river-prawn-macrobrachium-rosenbergii
#16
Chanpim Kangpanich, Jarunan Pratoomyot, Nisa Siranonthana, Wansuk Senanan
The giant river prawn (Macrobrachium rosenbergii) is one of the most farmed freshwater crustaceans in the world. Its global production has been stalling in the past decade due to the inconsistent quality of broodstock and hatchery-produced seeds. A better understanding of the role of nutrition in maturation diets will help overcome some of the production challenges. Arachidonic acid (20:4 n-6, ARA) is a fatty acid precursor of signaling molecules important for crustacean reproduction, prostaglandins E and F of the series II (PGE2 and PGF2α), and is often lacking in maturation diets of shrimp and prawns...
2016: PeerJ
https://www.readbyqxmd.com/read/27917068/iranocichla-persa-a-new-cichlid-species-from-southern-iran-teleostei-cichlidae
#17
Hamid Reza Esmaeili, Golnaz Sayyadzadeh, Ole Seehausen
Iranocichla persasp. n. is described from the Shur, Hasanlangi and Minab River drainages flowing into the Persian Gulf at the Strait of Hormuz in southern Iran. It is distinguished from Iranocichla hormuzensis, from the Mehran River drainage, by nuptial males having a bright orange breast and lower part of the head (vs. black), a poorly developed or invisible (vs. distinctive) "Tilapia-mark" in the dorsal fin and very clear white spots making almost wavy bars or stripes on the caudal fin (vs. without or with very few white spots)...
2016: ZooKeys
https://www.readbyqxmd.com/read/27916503/riggia-puyensis-n-sp-isopoda-cymothoidae-parasitizing-chaetostoma-breve-and-chaetostoma-microps-siluriformes-loricariidae-from-ecuador
#18
C Rodríguez Haro, M M Montes, P Marcotegui, S R Martorelli
A new isopod was found parasitizing Chaetostoma breve and Chaetostoma microps from the Puyo and Bobonaza rivers. The parasite found belongs to the Cymothoidae family and could be located within the genus Riggia instead of Artystone by the presence of abdominal plates fused with the telson. The specimens found represent a new species, Riggia puyensis n. sp., and could be distinguished from Riggia cryptocularis by the presence of developed eyes. The main difference of the new specie from Riggia nana and Riggia brasiliensis is the size, bigger compared with the first and smaller compared with the last species...
December 1, 2016: Acta Tropica
https://www.readbyqxmd.com/read/27916247/spatio-temporal-distribution-and-environmental-risk-of-sedimentary-heavy-metals-in-the-yangtze-river-estuary-and-its-adjacent-areas
#19
Bin Chen, Jian Liu, Jiandong Qiu, Xilin Zhang, Shuang Wang, Jinqing Liu
Twenty-five surface sediments and one sediment core sample were collected from the study area. Grain size, major elements, and heavy metals were determined. The content of fine-grained sediments (silt and clay), as well as the concentrations of major elements and heavy metals, showed seaward decreasing trends, with high content in the coastal areas of the East China Sea (ECS) and south west of Jeju Island. Low enrichment factor (EF) and geoaccumulation index (Igeo) values were found, indicating that the ecological risk of heavy metals was low...
December 1, 2016: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/27916131/synthesis-of-nano-hydroxyapatite-sorbent-for-microextraction-in-packed-syringe-of-phthalate-esters-in-water-samples
#20
Amirhassan Amiri, Mohammad Chahkandi, Azadeh Targhoo
An easy alkoxide-based sol-gel method using Ca(NO3)2·4H2O and tri-ethyl phosphate (PO(OC2H5)3; TEP) precursors employed to synthesize nano-hydroxyapatite (HAP). The structural characterization of samples was studied using XRD, TEM and elemental analysis of SEM. Scherrer and Williamson-Hall equations were applied to measurement of the crystallite size distributions and micro-strain of the synthesized HAP powder. The synthesized HAP nanoparticles were applied as an efficient sorbent for the microextraction in packed syringe (MEPS) of phthalate esters (PAEs) from water samples...
January 15, 2017: Analytica Chimica Acta
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