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Streaming potential

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https://www.readbyqxmd.com/read/29468779/probabilistic-measures-of-climate-change-vulnerability-adaptation-action-benefits-and-related-uncertainty-from-maximum-temperature-metric-selection
#1
J Tyrell DeWeber, Tyler Wagner
Predictions of the projected changes in species distribution models and potential adaptation action benefits can help guide conservation actions. There is substantial uncertainty in projecting species distributions into an unknown future, however, which can undermine confidence in predictions or misdirect conservation actions if not properly considered. Recent studies have shown that the selection of alternative climate metrics describing very different climatic aspects (e.g., mean air temperature vs. mean precipitation) can be a substantial source of projection uncertainty...
February 22, 2018: Global Change Biology
https://www.readbyqxmd.com/read/29468602/time-series-disturbance-detection-for-hypothesis-free-signal-detection-in-longitudinal-observational-databases
#2
Ed Whalen, Manfred Hauben, Andrew Bate
INTRODUCTION: Signal detection remains a cornerstone activity of pharmacovigilance. Routine quantitative signal detection primarily focuses on screening of spontaneous reports. In striving to enhance quantitative signal detection capability further, other data streams are being considered for their potential contribution as sources of emerging signals, one of which is longitudinal observational databases, including electronic medical record (EMR) and transactional insurance claims databases...
February 21, 2018: Drug Safety: An International Journal of Medical Toxicology and Drug Experience
https://www.readbyqxmd.com/read/29468384/redirection-of-neuroblast-migration-from-the-rostral-migratory-stream-into-a-lesion-in-the-prefrontal-cortex-of-adult-rats
#3
Jannis Gundelach, Michael Koch
Clinical treatment of structural brain damage today is largely limited to symptomatic approaches and the avoidance of secondary injury. However, neuronal precursor cells are constantly produced within specified regions of the mammalian brain throughout life. Here we evaluate the potential of the known chemoattractive properties of the glycoprotein laminin on neuroblasts to relocate the cells into damaged brain areas. Injection of a thin laminin tract, leading from the rostral migratory stream to an excitotoxic lesion within the medial prefrontal cortex of rats, enabled neuroblasts to migrate away from their physiological route towards the olfactory bulb into the lesion site...
February 21, 2018: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/29464821/determination-of-adsorption-and-desorption-of-dna-molecules-on-freshwater-and-marine-sediments
#4
Jia Xue, Yucheng Feng
AIMS: Free DNA and its adsorption by sediment in the aquatic environment lead to ambiguity in the identification of recent fecal pollution sources. The goal of this study was to understand the mechanisms of DNA adsorption and desorption on aquatic sediment under various conditions using quantitative polymerase chain reaction (qPCR). METHODS AND RESULTS: Both raw sewage (RS) DNA and purified PCR product (PPP) were used in adsorption and desorption experiments; autoclaved freshwater and marine sediments served as sorbents...
February 21, 2018: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/29460291/theoretical-study-of-the-effect-of-piezoelectric-bone-matrix-on-transient-fluid-flow-in-the-osteonal-lacunocanaliculae
#5
Sungki Min, Taekyeong Lee, Soon Hyuck Lee, Junghwa Hong
A new theoretical generation mechanism of the transient streaming potential considering variations in the surface potential on the wall in a lacunocanalicular system, is proposed based on the assumption of the piezoelectric bone matrix. To obtain the streaming potential analytically, a modified transient charge density equation is proposed. An osteon is modeled as a piezoelectric solid phase having fluid-filled cavities (lacunae) connected by channels (canaliculae) to obtain the pressure gradients in the canaliculae and the electric boundary conditions on the canalicular walls...
February 20, 2018: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/29459499/-long-term-cultivation-and-metagenomics-reveal-ecophysiology-of-previously-uncultivated-thermophiles-involved-in-biogeochemical-nitrogen-cycle
#6
Shingo Kato, Sanae Sakai, Miho Hirai, Eiji Tasumi, Manabu Nishizawa, Katsuhiko Suzuki, Ken Takai
Many thermophiles thriving in a natural high-temperature environment remain uncultivated, and their ecophysiological functions in the biogeochemical cycle remain unclear. In the present study, we performed long-term continuous cultivation at 65°C and 70°C using a microbial mat sample, collected from a subsurface geothermal stream, as the inoculum, and reconstructed the whole genome of the maintained populations using metagenomics. Some metagenome-assembled genomes (MAGs), affiliated into phylum-level bacterial and archaeal clades without cultivated representatives, contained genes involved in nitrogen metabolism including nitrification and denitrification...
February 16, 2018: Microbes and Environments
https://www.readbyqxmd.com/read/29457806/enhancement-of-the-selectivity-of-mxenes-m-2-c-m-ti-v-nb-mo-via-oxygen-functionalization-promising-materials-for-gas-sensing-and-separation
#7
A Junkaew, R Arróyave
Two-dimensional graphene-like materials, namely MXenes, have been proposed as potential materials for various applications. In this work, the reactivity and selectivity of four MXenes (i.e. M2 C (M = Ti, V, Nb, Mo)) and their oxygen-functionalized forms (i.e. O-MXenes or M2 CO2 ) toward gas molecules were investigated by using the plane wave-based Density Functional Theory (DFT) calculations. Small gas molecules, which are commonly found in flue gas streams, are considered herein. Our results demonstrated that MXenes are very reactive...
February 19, 2018: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29456525/kinetics-and-novel-degradation-pathway-of-permethrin-in-acinetobacter-baumannii-zh-14
#8
Hui Zhan, Huishan Wang, Lisheng Liao, Yanmei Feng, Xinghui Fan, Lianhui Zhang, Shaohua Chen
Persistent use of permethrin has resulted in its ubiquitous presence as a contaminant in surface streams and soils, yet little is known about the kinetics and metabolic behaviors of this pesticide. In this study, a novel bacterial strain Acinetobacter baumannii ZH-14 utilizing permethrin via partial hydrolysis pathways was isolated from sewage sludge. Response surface methodology based on Box-Behnken design of cultural conditions was used for optimization resulting in 100% degradation of permethrin (50 mg·L-1 ) within 72 h...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29454187/investigating-the-time-dependent-zeta-potential-of-wood-surfaces
#9
Livius F Muff, Thomas Luxbacher, Ingo Burgert, Benjamin Michen
This work reports on streaming potential measurements through natural capillaries in wood and investigates the cause of a time-dependent zeta potential measured during the equilibration of wood cell-walls with an electrolyte solution. For the biomaterial, this equilibration phase takes several hours, which is much longer than for many other materials that have been characterized by electrokinetic measurements. During this equilibration phase the zeta potential magnitude is decaying due to two parallel mechanisms: (i) the swelling of the cell-wall which causes a dimensional change reducing the charge density at the capillary interface; (ii) the transport of ions from the electrolyte solution into the permeable cell-wall which alters the electrical potential at the interface by internal charge compensation...
February 7, 2018: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/29453259/common-hydraulic-fracturing-fluid-additives-alter-the-structure-and-function-of-anaerobic-microbial-communities
#10
Adam C Mumford, Denise M Akob, J Grace Klinges, Isabelle M Cozzarelli
The development of unconventional oil and gas (UOG) resources results in production of large volumes of wastewater containing a complex mixture of hydraulic fracturing chemical additives and components from the formation. Release of these wastewaters into the environment poses potential risks that are poorly understood. Microbial communities in stream sediments form the base of the food chain, and may serve as sentinels for changes in stream health. Iron reducing organisms have been shown to play a role in the biodegradation of a wide range of organic compounds, and to evaluate their response to UOG wastewater, we enriched anaerobic microbial communities from sediments collected upstream (background) and downstream (impacted) of an UOG wastewater injection disposal facility in the presence of hydraulic fracturing fluid (HFF) additives: guar gum, ethylene glycol, and two biocides, DBNPA and Bronopol...
February 16, 2018: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/29449795/foundations-for-streaming-model-transformations-by-complex-event-processing
#11
István Dávid, István Ráth, Dániel Varró
Streaming model transformations represent a novel class of transformations to manipulate models whose elements are continuously produced or modified in high volume and with rapid rate of change. Executing streaming transformations requires efficient techniques to recognize activated transformation rules over a live model and a potentially infinite stream of events. In this paper, we propose foundations of streaming model transformations by innovatively integrating incremental model query, complex event processing (CEP) and reactive (event-driven) transformation techniques...
2018: Software and Systems Modeling
https://www.readbyqxmd.com/read/29445216/evaluation-of-her2-specific-peptide-ligand-for-its-employment-as-radiolabeled-imaging-probe
#12
Hadis Honarvar, Enrica Calce, Nunzianna Doti, Emma Langella, Anna Orlova, Jos Buijs, Valentina D'Amato, Roberto Bianco, Michele Saviano, Vladimir Tolmachev, Stefania De Luca
HER2 transmembrane receptor is an important target in immunotherapy treatment of breast and gastroesophageal cancer. Molecular imaging of HER2 expression may provide essential prognostic and predictive information concerning disseminated cancer and aid in selection of an optimal therapy. Radiolabeled low molecular weight peptide ligands are particularly attractive as probes for molecular imaging, since they reach and bind to the target and clear from non-target organs and blood stream faster than bulky antibodies...
February 14, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29444140/getting-to-fp2020-harnessing-the-private-sector-to-increase-modern-contraceptive-access-and-choice-in-ethiopia-nigeria-and-drc
#13
Christina Riley, Danielle Garfinkel, Katherine Thanel, Keith Esch, Endale Workalemahu, Jennifer Anyanti, Godéfroid Mpanya, Arsène Binanga, Jen Pope, Kim Longfield, Jane Bertrand, Bryan Shaw
BACKGROUND: An estimated 214 million women have unmet need for family planning in developing regions. Improved utilization of the private sector is key to achieving universal access to a range of safe and effective modern contraceptive methods stipulated by FP2020 and SDG commitments. Until now, a lack of market data has limited understanding of the private sector's role in increasing contraceptive coverage and choice. METHODS: In 2015, the FPwatch Project conducted representative outlet surveys in Ethiopia, Nigeria, and DRC using a full census approach in selected administrative areas...
2018: PloS One
https://www.readbyqxmd.com/read/29440414/changing-character-of-rainfall-in-eastern-china-1951-2007
#14
Jesse A Day, Inez Fung, Weihan Liu
The topography and continental configuration of East Asia favor the year-round existence of storm tracks that extend thousands of kilometers from China into the northwestern Pacific Ocean, producing zonally elongated patterns of rainfall that we call "frontal rain events." In spring and early summer (known as "Meiyu Season"), frontal rainfall intensifies and shifts northward during a series of stages collectively known as the East Asian summer monsoon. Using a technique called the Frontal Rain Event Detection Algorithm, we create a daily catalog of all frontal rain events in east China during 1951-2007, quantify their attributes, and classify all rainfall on each day as either frontal, resulting from large-scale convergence, or nonfrontal, produced by local buoyancy, topography, or typhoons...
February 12, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29439807/could-notch-signaling-pathway-be-a-potential-therapeutic-option-in-renal-diseases
#15
Laura Marquez-Exposito, Elena Cantero-Navarro, Carolina Lavoz, Marta Fierro-Fernández, Jonay Poveda, Sandra Rayego-Mateos, Raúl R Rodrigues-Diez, José Luis Morgado-Pascual, Macarena Orejudo, Sergio Mezzano, Marta Ruiz-Ortega
Notch pathway regulates key processes in the kidney, involved in embryonic development and tissue damage. In many human chronic renal diseases a local activation of Notch pathway has been described, suggesting that several components of Notch pathway could be considered as biomarkers of renal damage. Experimental studies by genetic modulation of Notch components or pharmacological approaches by γ-secretase inhibitors have demonstrated the role of this pathway in renal regeneration renal, podocyte apoptosis, proliferation and fibroblasts activation, and induction of epithelial to mesenchymal transition of tubular epithelial cells...
February 10, 2018: Nefrología: Publicación Oficial de la Sociedad Española Nefrologia
https://www.readbyqxmd.com/read/29437766/perspective-on-circulating-tumor-cell-clusters-why-it-takes-a-village-to-metastasize
#16
Mario Giuliano, Anum Shaikh, Hin Ching Lo, Grazia Arpino, Sabino De Placido, Xiang H Zhang, Massimo Cristofanilli, Rachel Schiff, Meghana V Trivedi
Circulating tumor cell (CTC) clusters may represent one of the key mechanisms initiating the metastasis process. However, the series of pathophysiologic events by which CTC clusters originate, enter the circulation, and reach the distant sites remain to be identified. The cellular and molecular mechanisms that provide survival advantage for CTC clusters during the transit in the blood stream are also still largely unknown. Understanding the biology of CTC clusters is critical to assess this unified scheme employed by cancer and to device strategies to overcome key pathways responsible for their improved metastatic potential...
February 2, 2018: Cancer Research
https://www.readbyqxmd.com/read/29436055/deep-recurrent-neural-network-reveals-a-hierarchy-of-process-memory-during-dynamic-natural-vision
#17
Junxing Shi, Haiguang Wen, Yizhen Zhang, Kuan Han, Zhongming Liu
The human visual cortex extracts both spatial and temporal visual features to support perception and guide behavior. Deep convolutional neural networks (CNNs) provide a computational framework to model cortical representation and organization for spatial visual processing, but unable to explain how the brain processes temporal information. To overcome this limitation, we extended a CNN by adding recurrent connections to different layers of the CNN to allow spatial representations to be remembered and accumulated over time...
February 12, 2018: Human Brain Mapping
https://www.readbyqxmd.com/read/29435251/transcriptome-response-of-atlantic-salmon-salmo-salar-to-competition-with-ecologically-similar-non-native-species
#18
Xiaoping He, Aimee Lee S Houde, Bryan D Neff, Daniel D Heath
Non-native species may be introduced either intentionally or unintentionally, and their impact can range from benign to highly disruptive. Non-native salmonids were introduced into Lake Ontario, Canada, to provide recreational fishing opportunities; however, the establishment of those species has been proposed as a significant barrier to the reintroduction of native Atlantic salmon (Salmo salar) due to intense interspecific competition. In this study, we compared population differences of Atlantic salmon in transcriptome response to interspecific competition...
February 2018: Ecology and Evolution
https://www.readbyqxmd.com/read/29432619/attenuated-accumulation-of-jasmonates-modifies-stomatal-responses-to-water-deficit
#19
Carlos De Ollas, Vicent Arbona, Aurelio Gómez-Cadenas, Ian C Dodd
To determine whether drought-induced root jasmonates (JA, jasmonic acid and JA-Ile, jasmonic acid iso-leucine) accumulation affected shoot responses to drying soil, near isogenic wild type (WT) tomato (Solanum lycopersicum cv. Castlemart) and the def-1 mutant (which fails to accumulate jasmonates during water deficit) were self- and reciprocally-grafted. Rootstock hydraulic conductance was entirely rootstock-dependent and significantly lower in def-1, yet def-1 scions maintained a higher leaf water potential as the soil dried due to their lower stomatal conductance (gs)...
February 8, 2018: Journal of Experimental Botany
https://www.readbyqxmd.com/read/29432105/learning-a-continuous-time-streaming-video-qoe-model
#20
Deepti Ghadiyaram, Janice Pan, Alan C Bovik
Over-the-top adaptive video streaming services are frequently impacted by fluctuating network conditions that can lead to rebuffering events (stalling events) and sudden bitrate changes. These events visually impact video consumers' quality of experience (QoE) and can lead to consumer churn. The development of models that can accurately predict viewers' instantaneous subjective QoE under such volatile network conditions could potentially enable the more efficient design of quality-control protocols for media-driven services, such as YouTube, Amazon, Netflix, and so on...
May 2018: IEEE Transactions on Image Processing: a Publication of the IEEE Signal Processing Society
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