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Streaming potential

Cedric Wannaz, Antonio Franco, John Kilgallon, Juliet Hodges, Olivier Jolliet
This paper analyzes spatially ecosystem exposure to home and personal care (HPC) chemicals, accounting for market data and environmental processes in hydrological water networks, including multi-media fate and transport. We present a global modeling framework built on ScenAT (spatial scenarios of emission), SimpleTreat (sludge treatment plants), and Pangea (spatial multi-scale multimedia fate and transport of chemicals), that we apply across Asia to four chemicals selected to cover a variety of applications, volumes of production and emission, and physico-chemical and environmental fate properties: the anionic surfactant linear alkylbenzene sulphonate (LAS), the antimicrobial triclosan (TCS), the personal care preservative methyl paraben (MeP), and the emollient decamethylcyclopentasiloxane (D5)...
December 5, 2017: Science of the Total Environment
Helen P Jarvie, Douglas R Smith, Lisa R Norton, Francois K Edwards, Michael J Bowes, Stephen M King, Peter Scarlett, Sian Davies, Rachael M Dils, Nuria Bachiller-Jareno
This study provides a first national-scale assessment of the nutrient status of British headwater streams within the wider river network, by joint analysis of the national Countryside Survey Headwater Stream and Harmonised River Monitoring Scheme datasets. We apply a novel Nutrient Limitation Assessment methodology to explore the extent to which nutrients may potentially limit primary production in headwater streams and rivers, by coupling ternary assessment of nitrogen (N), phosphorus (P), and carbon (C) depletion, with N:P stoichiometry, and threshold P and N concentrations...
December 4, 2017: Science of the Total Environment
Xiao Cheng, Xinyan Yang, Zhihao Zhu, Lianbo Guo, Xiangyou Li, Yongfeng Lu, Xiaoyan Zeng
On-stream analysis of the element content in ore slurry has important significance in the control of the flotation process and full use of raw materials. Therefore, techniques that can monitor the chemistry in slurries online are required. Laser-induced breakdown spectroscopy (LIBS) is one of the potential approaches to online measurements due to its capability of in situ and real-time analysis. However, using LIBS for on-stream analysis of slurries is challenging due to the issues such as surface ripples, sample splashing, sedimentation, etc...
November 20, 2017: Applied Optics
David Nicolas Østedgaard-Munck, Jacopo Catalano, Mette Birch Kristensen, Anders Bentien
This article elaborates on the design and optimization of a specialized flow cell for the measurement of direct conversion of pressure into electrical energy (Electrokinetic Energy Conversion, EKEC) which has been presented in Østedgaard-Munck et al. (2017) [1]. Two main flow cell parameters have been monitored and optimized: A) the hydraulic pressure profile on each side of the membrane introduced by pumps recirculating the electrolyte solution through the flow fields and B) the electrical resistance between the current collectors across the combined flow cell...
December 2017: Data in Brief
Ze Ren, Fang Wang, Xiaodong Qu, James J Elser, Yang Liu, Limin Chu
Understanding microbial communities in terms of taxon and function is essential to decipher the biogeochemical cycling in aquatic ecosystems. Lakes and their input streams are highly linked. However, the differences between microbial assemblages in streams and lakes are still unclear. In this study, we conducted an intensive field sampling of microbial communities from lake water and stream biofilms in the Qinghai Lake watershed, the largest lake in China. We determined bacterial communities using high-throughput 16S rRNA gene sequencing and predicted functional profiles using PICRUSt to determine the taxonomic and functional differences between microbial communities in stream biofilms and lake water...
2017: Frontiers in Microbiology
Jeneen Hadj-Hammou, Steven Loiselle, Daniel Ophof, Ian Thornhill
While the role of citizen science in engaging the public and providing large-scale datasets has been demonstrated, the nature of and potential for this science to supplement environmental monitoring efforts by government agencies has not yet been fully explored. To this end, the present study investigates the complementarity of a citizen science programme to agency monitoring of water quality. The Environment Agency (EA) is the governmental public body responsible for, among other duties, managing and monitoring water quality and water resources in England...
2017: PloS One
Xiaolin Sheng, Rui Liu, Lujun Chen, Zihua Yin, Jianfeng Zhu
In this study, nitrifying bacteria were enriched in a membrane bioreactor (MBR, R1) and their bioaugmentation effectiveness was evaluated in another two MBRs (R2 and R3). Nitrifying activated sludge (NAS) with high nitrification activity of up to 3,000 mg-N/(L·d)-1 was successfully enriched in R1. The results showed that chemical oxygen demand concentration of 100-200 mg/L had no negative effect on NAS enrichment but reduced the ratio of bacterial nitrifiers. Moreover, the cell concentration of nitrifying bacteria in NAS, which was 3...
December 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
Leonardo Capeleto de Andrade, Tales Tiecher, Jessica Souza de Oliveira, Robson Andreazza, Alberto Vasconcellos Inda, Flávio Anastácio de Oliveira Camargo
Sediments are formed by deposition of organic and inorganic particles on depth of water bodies, being an important role in aquatic ecosystems, including destination and potential source of essential nutrients and heavy metals, which may be toxic for living organisms. The Lake Guaíba supplies water for approximately two million people and it is located in the metropolitan region of Porto Alegre, Rio Grande do Sul State, Brazil. Thus, the aim of this study was to evaluate the sediment pollution in the margins of Lake Guaíba in the vicinity of Porto Alegre city...
December 2, 2017: Environmental Monitoring and Assessment
Thiemo Zambanini, Sandra K Hartmann, Lisa M Schmitz, Linda Büttner, Hamed Hosseinpour Tehrani, Elena Geiser, Melanie Beudels, Dominik Venc, Georg Wandrey, Jochen Büchs, Markus Schwarzländer, Lars M Blank, Nick Wierckx
Background: Ustilago maydis is known for its natural potential to produce a broad range of valuable chemicals, such as itaconate, from both industrial carbon waste streams and renewable biomass. Production of itaconate, and many other secondary metabolites, is induced by nitrogen limitation in U. maydis. The clustered genes responsible for itaconate production have recently been identified, enabling the development of new expression tools that are compatible with biotechnological processes...
2017: Fungal Biology and Biotechnology
Feixiang Zan, Ji Dai, Yuze Hong, Meiyin Wong, Feng Jiang, Guanghao Chen
Food waste (FW) is a worldwide environmental issue due to its huge production amount. FW separation from municipal solid waste followed by different treatment strategies has been widely accepted. Food waste disposer (FWD) is a promising approach to separate and collect household food waste (HFW), which has been widely applied in many countries. However, the feasibility of FWD application in many countries is still being debated due to the major concerns over the impact of FWD on the wastewater treatment plants...
December 2, 2017: Waste Management
Seyedeh-Sanam Ladi-Seyedian, Behnam Nabavizadeh, Lida Sharifi-Rad, Abdol-Mohammad Kajbafzadeh
Underactive bladder (UAB) is a common cause of lower urinary tract dysfunction which has an increasing incidence with aging. It is characterized as an incompetent detrusor contraction with reduced strength and/or duration to completely empty the bladder. UAB is observed in both men and women. The exact definition, classification, and pathophysiological mechanism responsible for UAB is still debatable, however neurologic, myogenic, and iatrogenic causes are explained. The symptom complex related to UAB includes hesitancy, diminished sensation of bladder filling, a slow urinary stream, increased post-void residue, and etc...
December 5, 2017: Expert Review of Clinical Pharmacology
Paulo J C Favas, João Pratas, Nelson Rodrigues, Rohan D'Souza, Mayank Varun, Manoj S Paul
Aquatic bryophytes can accumulate extremely high levels of chemical elements because of their unique morphology and physiology which is markedly different from vascular plants. Four aquatic mosses-Fontinalis squamosa, Brachythecium rivulare, Platyhypnidium riparioides, Thamnobryum alopecurum-and a freshwater red alga Lemanea fluviatilis along with water samples from the streams of Góis mine region in Central Portugal were analyzed for 46 elements. Despite being below detection levels in the water samples, the elements Zr, V, Cr, Mo, Ru, Os, Rh, Ir, Pt, Ag, Ge and Bi were obtained in the plant samples...
November 23, 2017: Chemosphere
Julian Lange, Felix Müller, Kerstin Bernecker, Nicolaus Dahmen, Ralf Takors, Bastian Blombach
Background: A future bioeconomy relies on the efficient use of renewable resources for energy and material product supply. In this context, biorefineries have been developed and play a key role in converting lignocellulosic residues. Although a holistic use of the biomass feed is desired, side streams evoke in current biorefinery approaches. To ensure profitability, efficiency, and sustainability of the overall conversion process, a meaningful valorization of these materials is needed...
2017: Biotechnology for Biofuels
Omar Viswanath, Deanna C Menapace, Don B Headley
Thyroid storm is a rare, potentially lethal condition involving collapse of the hypothalamic-pituitary-thyroid feedback loop. Thyroid storm carries a significant mortality rate, thus requiring prompt identification and treatment. A 47-year-old woman presented to the emergency department complaining of palpitations, shortness of breath, and emesis for 24 hours after using methamphetamine. Past medical history was significant for untreated hyperthyroidism. Physical examination revealed a prominent, palpable thyroid...
2017: Clinical Medicine Insights. Ear, Nose and Throat
Sarah B Whittle, Kaitlin C Williamson, Heidi V Russell
High-risk neuroblastoma is an aggressive childhood cancer with poor outcomes. Treatment begins with an induction phase comprised of intense multi-agent chemotherapy with the goal of maximally reducing tumor bulk. Given the high intensity of induction chemotherapy, neutropenic fever and infectious complications are common; however, the actual incidence is difficult to determine from clinical trial reports. We performed a retrospective review of infection-related complications in 76 children treated for high-risk neuroblastoma at Texas Children's Hospital...
December 4, 2017: Pediatric Hematology and Oncology
Yaguang Zhai, Anyang Wang, Domin Koh, Philip Schneider, Kwang W Oh
In capillary- or vacuum-driven microfluidics, surge backflow events are common when merging or pumping two similar or dissimilar liquids together if a pressure difference exists between them. In this work, a robust, portable micromixing device that is insensitive to backflow was designed, fabricated and characterised. A capillary-driven pressure balancing bypass connected between two inlet ports diminished the initial pressure difference caused by capillarity and gravity present in each liquid at the two inlet ports...
December 4, 2017: Lab on a Chip
Jonas Jourdan, Robert B O'Hara, Roberta Bottarin, Kaisa-Leena Huttunen, Mathias Kuemmerlen, Don Monteith, Timo Muotka, Dāvis Ozoliņš, Riku Paavola, Francesca Pilotto, Gunta Springe, Agnija Skuja, Andrea Sundermann, Jonathan D Tonkin, Peter Haase
Long-term observations on riverine benthic invertebrate communities enable assessments of the potential impacts of global change on stream ecosystems. Besides increasing average temperatures, many studies predict greater temperature extremes and intense precipitation events as a consequence of climate change. In this study we examined long-term observation data (10-32years) of 26 streams and rivers from four ecoregions in the European Long-Term Ecological Research (LTER) network, to investigate invertebrate community responses to changing climatic conditions...
November 28, 2017: Science of the Total Environment
Laura C Coates, Oliver FitzGerald, Joseph F Merola, Josef Smolen, Leonieke J J van Mens, Heidi Bertheussen, Wolf-Henning Boehncke, Kristina Callis Duffin, Willemina Campbell, Maarten de Wit, Dafna Gladman, Alice Gottlieb, Jana James, Arthur Kavanaugh, Lars Erik Kristensen, Tore K Kvien, Thomas Luger, Neil McHugh, Philip Mease, Peter Nash, Alexis Ogdie, Cheryl F Rosen, Vibeke Strand, William Tillett, Douglas J Veale, Philip S Helliwell
BACKGROUND: Many composite disease activity measures and targets have been developed for psoriatic arthritis (PsA). This GRAPPA-OMERACT work stream aimed to further the development of consensus among physicians and patients. METHODS: Prior to the meeting, physicians and patients were surveyed on outcome measures. A consensus meeting (26 rheumatologists, dermatologists, and patient representatives) reviewed evidence on composite measures and potential treatment targets, plus survey results...
November 28, 2017: Arthritis & Rheumatology
Sophie L Meyer, Monique R Jongbloed, Siew Y Ho, Margot M Bartelings, Karen P McCarthy, Hideki Uemura, Tjark Ebels
The aim of this study was to gain better understanding of the variable anatomical features of double inlet left ventricle hearts without cavopulmonary connection that would potentially facilitate favorable streaming. Thirty-nine post-mortem specimens of double inlet left ventricle without cavopulmonary connection were investigated. The focus was on anatomical characteristics that could influence the flow and separation of deoxygenated and oxygenated blood in the ventricles. Elements of interest were the ventriculoarterial connection, the spatial relationship of the ventricles, the position and size of the great arteries, the ventricular septal defect, the presence of relative outflow tract stenosis and the relationship of the inflow and outflow tracts...
2017: PloS One
Sara K Moses, Christine N Polkinghorne, William P Mattes, Kimberly M Beesley
Mercury concentrations were measured in eggs, larvae, and adult spawning-phase sea lampreys (Petromyzon marinus) collected in tributaries of Lake Superior to investigate spatial and ontogenetic variation. There were significant differences in mercury concentrations between all three life stages, with levels highest in adults (mean = 3.01 µg/g), followed by eggs (mean = 0.942 µg/g), and lowest in larvae (mean = 0.455 µg/g). There were no significant differences in mercury concentrations by location for any life stage or by sex in adults...
November 29, 2017: Bulletin of Environmental Contamination and Toxicology
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