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https://www.readbyqxmd.com/read/28821774/pre-coincidence-brain-activity-predicts-the-perceptual-outcome-of-streaming-bouncing-motion-display
#1
Song Zhao, Yajie Wang, Lina Jia, Chengzhi Feng, Yu Liao, Wenfeng Feng
When two identical visual discs move toward each other on a two-dimensional visual display, they can be perceived as either "streaming through" or "bouncing off" each other after their coincidence. Previous studies have observed a strong bias toward the streaming percept. Additionally, the incidence of the bouncing percept in this ambiguous display could be increased by various factors, such as a brief sound at the moment of coincidence and a momentary pause of the two discs. The streaming/bouncing bistable motion phenomenon has been studied intensively since its discovery...
August 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28821044/removal-of-heavy-metal-ions-by-magnetic-chitosan-nanoparticles-prepared-continuously-via-high-gravity-reactive-precipitation-method
#2
Hong-Lei Fan, Shao-Feng Zhou, Wei-Zhou Jiao, Gui-Sheng Qi, You-Zhi Liu
This study aimed to provide a continuous method for the preparation of magnetic Fe3O4/Chitosan nanoparticles (Fe3O4/CS NPs) that can be applied to efficient removal of heavy metal ions from aqueous solution. Using a novel impinging stream-rotating packed bed, the continuous preparation of Fe3O4/CS NPs reached a theoretical production rate of 3.43kg/h. The as-prepared Fe3O4/CS NPs were quasi-spherical with average diameter of about 18nm and saturation magnetization of 33.5emu/g. Owing to the strong metal chelating ability of chitosan, the Fe3O4/CS NPs exhibited better adsorption capacity and faster adsorption rates for Pb(II) and Cd(II) than those of pure Fe3O4...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28821002/modeling-the-fate-and-transport-of-17%C3%AE-estradiol-in-the-south-river-watershed-in-virginia
#3
Xiaomin Zhao, Wu-Seng Lung
Hormones excreted by livestock metabolisms often enter surface water through feces and urine and can potentially cause adverse impacts to aquatic biota. This study involved a modeling analysis of 17β-estradiol (E2), a prevalent estrogen, in the South River watershed located in Augusta County, Virginia from 2013 to 2015. Cattle manure, poultry litter, biosolids, septic systems, and wastewater treatment plants (WWTPs) were considered as sources of E2 in this study. The EPA's BASINS modeling framework was configured to track the fate and transport of E2...
August 13, 2017: Chemosphere
https://www.readbyqxmd.com/read/28816057/mitochondrial-complex-i-reversible-s-nitrosation-improves-bioenergetics-and-is-protective-in-parkinson-s-disease
#4
Chiara Milanese, Victor Tapias, Sylvia Gabriels, Silvia Cerri, Giovanna Levandis, Fabio Blandini, Maria Tresini, Sruti Shiva, J Timothy Greenamyre, Mark T Gladwin, Pier G Mastroberardino
AIMS: The present study was designed to explore the neuroprotective potential of inorganic nitrite as a new therapeutic avenue in Parkinson's disease (PD). RESULTS: Administration of inorganic nitrite ameliorates neuropathology in phylogenetically distinct animal models of PD. Beneficial effects are not confined to prophylactic treatment and occur also if nitrite is administered when the pathogenic cascade is already active. Mechanistically, the effect is mediated by both complex I S-nitrosation, which under nitrite administration is favored over formation of other forms of oxidation, and as well as down-stream activation of the antioxidant Nrf2 pathway...
August 17, 2017: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/28813673/multipotent-basal-stem-cells-maintained-in-localized-proximal-niches-support-directed-long-ranging-epithelial-flows-in-human-prostates
#5
Mohammad Moad, Edouard Hannezo, Simon J Buczacki, Laura Wilson, Amira El-Sherif, David Sims, Robert Pickard, Nicholas A Wright, Stuart C Williamson, Doug M Turnbull, Robert W Taylor, Laura Greaves, Craig N Robson, Benjamin D Simons, Rakesh Heer
Sporadic mitochondrial DNA mutations serve as clonal marks providing access to the identity and lineage potential of stem cells within human tissues. By combining quantitative clonal mapping with 3D reconstruction of adult human prostates, we show that multipotent basal stem cells, confined to discrete niches in juxta-urethral ducts, generate bipotent basal progenitors in directed epithelial migration streams. Basal progenitors are then dispersed throughout the entire glandular network, dividing and differentiating to replenish the loss of apoptotic luminal cells...
August 15, 2017: Cell Reports
https://www.readbyqxmd.com/read/28811258/category-selective-human-brain-processes-elicited-in-fast-periodic-visual-stimulation-streams-are-immune-to-temporal-predictability
#6
Genevieve L Quek, Bruno Rossion
Recording direct neural activity when periodically inserting exemplars of a particular category in a rapid visual stream of other objects offers an objective and efficient way to quantify perceptual categorization and characterize its spatiotemporal dynamics. However, since periodicity entails predictability, perceptual categorization processes identified within this framework may be partly generated or modulated by temporal expectations. Here we present a stringent test of the hypothesis that temporal predictability generates or modulates category-selective neural processes as measured in a rapid periodic visual stimulation stream...
August 12, 2017: Neuropsychologia
https://www.readbyqxmd.com/read/28810215/continuous-operation-of-thermophilic-food-waste-digestion-with-side-stream-ammonia-stripping
#7
Wei Zhang, Sonia Heaven, Charles J Banks
Digesters fed on food waste (high nitrogen content) were operated successfully over an extended period using sidestream biogas stripping to control total ammonia nitrogen (TAN) below inhibitory concentrations. This is the first time biogas stripping has been used to achieve stable thermophilic operation with undiluted substrate of this type. Stripping columns operated batch-wise treated the equivalent of 1.7-4.1% of digester contents daily at pH >10 and 70°C, with no detrimental effect on digestion. TKN removal was 54%, with potential to recover 3...
August 3, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28809707/a-streaming-pca-vlsi-chip-for-neural-data-compression
#8
Tong Wu, Wenfeng Zhao, Hongsun Guo, Hubert H Lim, Zhi Yang
Neural recording system miniaturization and integration with low-power wireless technologies require compressing neural data before transmission. Feature extraction is a procedure to represent data in a low-dimensional space; its integration into a recording chip can be an efficient approach to compress neural data. In this paper, we propose a streaming principal component analysis algorithm and its microchip implementation to compress multichannel local field potential (LFP) and spike data. The circuits have been designed in a 65-nm CMOS technology and occupy a silicon area of 0...
August 14, 2017: IEEE Transactions on Biomedical Circuits and Systems
https://www.readbyqxmd.com/read/28808555/phenotypic-convergence-of-artificially-reared-and-wild-trout-is-mediated-by-shape-plasticity
#9
Jorge Ruben Sánchez-González, Alfredo G Nicieza
Phenotypic plasticity can be viewed as the first level of defense of organism homeostasis against environmental stress and therefore represents the potential to deal with rapid environmental changes. Transitions between low complexity, artificial environments and complex, natural habitats can promote phenotypic plasticity. Here, we conducted an experimental introduction with juvenile brown trout to evaluate the plasticity of shape in response to a transition between contrasting environments. We released 202 juvenile trout reared under hatchery conditions in a natural stream and analyzed changes in shape and morphological variability after 5 months...
August 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28806954/-usability-of-data-integration-and-visualization-software-for-multidisciplinary-pediatric-intensive-care-a-human-factors-approach-to-assessing-technology
#10
Ying Ling Lin, Anne-Marie Guerguerian, Jessica Tomasi, Peter Laussen, Patricia Trbovich
BACKGROUND: Intensive care clinicians use several sources of data in order to inform decision-making. We set out to evaluate a new interactive data integration platform called T3™ made available for pediatric intensive care. Three primary functions are supported: tracking of physiologic signals, displaying trajectory, and triggering decisions, by highlighting data or estimating risk of patient instability. We designed a human factors study to identify interface usability issues, to measure ease of use, and to describe interface features that may enable or hinder clinical tasks...
August 14, 2017: BMC Medical Informatics and Decision Making
https://www.readbyqxmd.com/read/28803376/debris-flow-induced-topographic-changes-effects-of-recurrent-debris-flow-initiation
#11
Chien-Yuan Chen, Qun Wang
Chushui Creek in Shengmu Village, Nantou County, Taiwan, was analyzed for recurrent debris flow using numerical modeling and geographic information system (GIS) spatial analysis. The two-dimensional water flood and mudflow simulation program FLO-2D were used to simulate debris flow induced by rainfall during typhoon Herb in 1996 and Mindulle in 2004. Changes in topographic characteristics after the debris flows were simulated for the initiation of hydrological characteristics, magnitude, and affected area. Changes in topographic characteristics included those in elevation, slope, aspect, stream power index (SPI), topographic wetness index (TWI), and hypsometric curve integral (HI), all of which were analyzed using GIS spatial analysis...
August 12, 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28803193/a-detailed-risk-assessment-of-shale-gas-development-on-headwater-streams-in-the-pennsylvania-portion-of-the-upper-susquehanna-river-basin-u-s-a
#12
Kelly O Maloney, John A Young, Stephen P Faulkner, Atesmachew Hailegiorgis, E Terrence Slonecker, Lesley E Milheim
The development of unconventional oil and gas (UOG) involves infrastructure development (well pads, roads and pipelines), well drilling and stimulation (hydraulic fracturing), and production; all of which have the potential to affect stream ecosystems. Here, we developed a fine-scaled (1:24,000) catchment-level disturbance intensity index (DII) that included 17 measures of UOG capturing all steps in the development process (infrastructure, water withdrawals, probabilistic spills) that could affect headwater streams (<200km(2) in upstream catchment) in the Upper Susquehanna River Basin in Pennsylvania, U...
August 10, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28803154/prospects-recent-advancements-and-challenges-of-different-wastewater-streams-for-microalgal-cultivation
#13
REVIEW
Abhishek Guldhe, Sheena Kumari, Luveshan Ramanna, Prathana Ramsundar, Poonam Singh, Ismail Rawat, Faizal Bux
Microalgae are recognized as one of the most powerful biotechnology platforms for many value added products including biofuels, bioactive compounds, animal and aquaculture feed etc. However, large scale production of microalgal biomass poses challenges due to the requirements of large amounts of water and nutrients for cultivation. Using wastewater for microalgal cultivation has emerged as a potential cost effective strategy for large scale microalgal biomass production. This approach also offers an efficient means to remove nutrients and metals from wastewater making wastewater treatment sustainable and energy efficient...
August 9, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28802893/complex-mixtures-of-dissolved-pesticides-show-potential-aquatic-toxicity-in-a-synoptic-study-of-midwestern-u-s-streams
#14
Lisa H Nowell, Patrick W Moran, Travis S Schmidt, Julia E Norman, Naomi Nakagaki, Megan E Shoda, Barbara J Mahler, Peter C Van Metre, Wesley W Stone, Mark W Sandstrom, Michelle L Hladik
Aquatic organisms in streams are exposed to pesticide mixtures that vary in composition over time in response to changes in flow conditions, pesticide inputs to the stream, and pesticide fate and degradation within the stream. To characterize mixtures of dissolved-phase pesticides and degradates in Midwestern streams, a synoptic study was conducted at 100 streams during May-August 2013. In weekly water samples, 94 pesticides and 89 degradates were detected, with a median of 25 compounds detected per sample and 54 detected per site...
August 4, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28802014/flow-covariate-prediction-of-stream-pesticide-concentrations
#15
Paul L Mosquin, Jeremy Aldworth, Wenlin Chen
Potential "peak" functions (e.g., maximum rolling averages over a given duration) of annual pesticide concentrations in the aquatic environment are important exposure parameters (or target quantities) for ecological risk assessments. These target quantities require accurate concentration estimates on non-sampled days in a monitoring program. In this paper, we examine stream flow as a covariate via universal kriging to improve predictions of maximum m-day (m = 1, 7, 14, 30, 60) rolling averages and the 95(th) percentiles of atrazine concentration in streams where data were collected every 7 or 14 days...
August 12, 2017: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/28801829/cloning-and-characterization-of-halomonas-elongata-l-asparaginase-a-promising-chemotherapeutic-agent
#16
Ali Ghasemi, Sedigheh Asad, Mahboubeh Kabiri, Bahareh Dabirmanesh
L-asparaginase has been used in the treatment of patients with acute lymphoblastic leukemia (ALL) for more than 30 years. Rapid clearance of the enzyme from blood stream and its L-glutaminase-dependent neurotoxicity has led to searching for new L-asparaginases with more desirable properties. In the present study, L-asparaginase coding gene of Halomonas elongata was isolated, expressed in Escherichia coli, purified, and characterized. The purified protein was found to have a molecular mass of 39.5 kDa and 1000-folds more activity towards L-asparagine than L-glutamine...
August 11, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28800424/migration-of-pentachlorophenol-and-copper-from-a-preservative-treated-bridge
#17
Matthew Konkler, Jeffrey J Morrell
The potential for migration of pentachlorophenol (PCP) and copper naphthenate (CuNaph) from Douglas-fir was assessed in a bridge over a stream located in Western Oregon in the United States. All rainfall runoff was collected from a portion of the bridge on 15 occasions over a 27 month period and analyzed for pentachlorophenol or copper. PCP and copper were detected at every time point. PCP concentrations ranged from 0.296 to 6.183 μg/mL, while those for copper ranged from 0.37 to 7.80 μg/mL. These data were then used to estimate PCP and Cu inputs in runoff from the entire bridge...
August 8, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28798913/assessing-nutrient-removal-kinetics-in-flushed-manure-using-chlorella-vulgaris-biomass-production
#18
Pramod Pandey, Jun Shi
The utilization of dairy wastewater for producing algal biomass is seen as a two-fold opportunity to treat wastewater and produce algae biomass, which can be potentially used for production of biofuels. In animal agriculture system, one of the major waste streams is dairy manure that contains high levels of nitrogen and phosphorus. Furthermore, it is produced abundantly in California's dairy industry, as well as many other parts of the world. We hypothesized that flushed manure, wastewater from a dairy farm, can be used as a potential feedstock after pretreatment to grow Chlorella vulgaris biomass and to reduce nutrients of manure...
2017: Frontiers in Bioengineering and Biotechnology
https://www.readbyqxmd.com/read/28797521/increasing-chloride-in-rivers-of-the-conterminous-u-s-and-linkages-to-potential-corrosivity-and-lead-action-level-exceedances-in-drinking-water
#19
E G Stets, C J Lee, D A Lytle, M R Schock
Corrosion in water-distribution systems is a costly problem and controlling corrosion is a primary focus of efforts to reduce lead (Pb) and copper (Cu) in tap water. High chloride concentrations can increase the tendency of water to cause corrosion in distribution systems. The effects of chloride are also expressed in several indices commonly used to describe the potential corrosivity of water, the chloride-sulfate mass ratio (CSMR) and the Larson Ratio (LR). Elevated CSMR has been linked to the galvanic corrosion of Pb whereas LR is indicative of the corrosivity of water to iron and steel...
July 25, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28789974/beta-lactam-combination-therapy-for-treatment-of-staphylococcus-aureus-and-enterococcus-species-bacteremias-a-summary-and-appraisal-of-the-evidence
#20
REVIEW
Rachel Bartash, Priya Nori
Staphylococcal and Enterococcal bacteremias are prevalent in hospitalized, or recently instrumented patients, and associated with significant morbidity and mortality. They are often difficult to treat due to the pathogenicity of the organisms, poor response to antibiotics, and increasing development of multidrug resistance. Therefore, there has been increasing interest in combination therapy for treatment of these infections. This review aims to summarize and assess the evidence supporting combination beta-lactam therapy for both Staphylococcus aureus and Enterococcus species blood stream infections...
August 5, 2017: International Journal of Infectious Diseases: IJID
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