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Temporal patterning

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https://www.readbyqxmd.com/read/28646765/historical-record-of-polychlorinated-biphenyls-pcbs-and-special-occurrence-of-pcb-209-in-a-shallow-fresh-water-lake-from-eastern-china
#1
Shouliang Huo, Chaocan Li, Beidou Xi, Zhiqiang Yu, Kevin M Yeager, Fengchang Wu
Concentrations of polychlorinated biphenyls (PCBs) were measured in dated sediment cores collected from the fifth largest freshwater lake in China, Lake Chaohu, to investigate PCB temporal trends, accumulation, and environmental fate. Total PCB concentrations in Lake Choahu sediments ranged from 0.03 to 24.11 ng g(-1) (d.w.). PCB 209 was the dominant congener, accounting for 45.5%-83.9% of total PCBs detected after the mid-20th century. All PCB congeners were positively correlated with total organic carbon (TOC) concentrations...
June 18, 2017: Chemosphere
https://www.readbyqxmd.com/read/28646734/investigating-articulated-heavy-vehicle-crashes-in-western-australia-using-a-spatial-approach
#2
Ori Gudes, Richard Varhol, Qian Chayn Sun, Lynn Meuleners
BACKGROUND: Recent developments in Western Australia's economy including widespread traffic congestion as well as road safety issues are increasingly becoming prominent. Previous studies relied on traditional statistical methods to investigate patterns and characteristics of motor vehicle crashes. Although useful, statistical analysis alone is incapable of providing a spatial context and is therefore unable to associate existing crash characteristics with a spatial distribution. AIMS: To identify concentrations or "hotspots" of articulated heavy vehicle crashes in WA between the years 2001-2013, by using a spatial analysis approach...
June 21, 2017: Accident; Analysis and Prevention
https://www.readbyqxmd.com/read/28646626/sexual-dimorphism-in-umbilical-vein-blood-flow-during-the-second-half-of-pregnancy-a-longitudinal-study
#3
Christian Widnes, Kari Flo, Tom Wilsgaard, Anthony O Odibo, Ganesh Acharya
OBJECTIVES: To investigate gestational age-specific serial changes in umbilical vein (UV) volume blood flow during the second half of normal pregnancy and establish sex-specific reference ranges. METHODS: This work was a prospective longitudinal study of singleton low-risk pregnancies. The UV diameter and maximum blood flow velocity were serially measured by sonography at the intra-abdominal portion of the UV over 19 to 41 weeks. Umbilical vein volume blood flow was calculated and normalized for estimated fetal weight...
June 24, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28646132/global-rainfall-erosivity-assessment-based-on-high-temporal-resolution-rainfall-records
#4
Panos Panagos, Pasquale Borrelli, Katrin Meusburger, Bofu Yu, Andreas Klik, Kyoung Jae Lim, Jae E Yang, Jinren Ni, Chiyuan Miao, Nabansu Chattopadhyay, Seyed Hamidreza Sadeghi, Zeinab Hazbavi, Mohsen Zabihi, Gennady A Larionov, Sergey F Krasnov, Andrey V Gorobets, Yoav Levi, Gunay Erpul, Christian Birkel, Natalia Hoyos, Victoria Naipal, Paulo Tarso S Oliveira, Carlos A Bonilla, Mohamed Meddi, Werner Nel, Hassan Al Dashti, Martino Boni, Nazzareno Diodato, Kristof Van Oost, Mark Nearing, Cristiano Ballabio
The exposure of the Earth's surface to the energetic input of rainfall is one of the key factors controlling water erosion. While water erosion is identified as the most serious cause of soil degradation globally, global patterns of rainfall erosivity remain poorly quantified and estimates have large uncertainties. This hampers the implementation of effective soil degradation mitigation and restoration strategies. Quantifying rainfall erosivity is challenging as it requires high temporal resolution(<30 min) and high fidelity rainfall recordings...
June 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28645844/modelling-and-interpreting-mesoscale-network-dynamics
#5
REVIEW
Ankit N Khambhati, Ann E Sizemore, Richard F Betzel, Danielle S Bassett
Recent advances in brain imaging techniques, measurement approaches, and storage capacities have provided an unprecedented supply of high temporal resolution neural data. These data present a remarkable opportunity to gain a mechanistic understanding not just of circuit structure, but also of circuit dynamics, and its role in cognition and disease. Such understanding necessitates a description of the raw observations, and a delineation of computational models and mathematical theories that accurately capture fundamental principles behind the observations...
June 20, 2017: NeuroImage
https://www.readbyqxmd.com/read/28645085/extending-the-functionality-of-the-slurry-ferrihydrite-dgt-method-performance-evaluation-for-the-measurement-of-vanadate-arsenate-antimonate-and-molybdate-in-water
#6
Shu Zhang, Paul N Williams, Chun-Yang Zhou, Lena Q Ma, Jun Luo
The monitoring of oxyanions in waters, presents significant challenges due to their relatively low concentrations, and a characteristically changeable/unstable/reactive geochemistry with high spatial and temporal turnover. This results in a very heterogeneous pattern of mobility and bioavailability, which is difficult to capture reliably and in a cost effective manner. The diffusive gradients in thin-films (DGT) technique is a popular analytical tool for testing water quality, primarily because it provides a time-integrated measurement...
June 18, 2017: Chemosphere
https://www.readbyqxmd.com/read/28645069/controlled-single-bubble-cavitation-collapse-results-in-jet-induced-injury-in-brain-tissue
#7
Saranya Canchi, Karen Kelly, Yu Hong, Michael A King, Ghatu Subhash, Malisa Sarntinoranont
Multiscale damage due to cavitation is considered as a potential mechanism of traumatic brain injury (TBI) associated with explosion. In this study, we employed a TBI relevant hippocampal ex vivo slice model to induce bubble cavitation. Placement of single reproducible seed bubbles allowed control of size, number, and tissue location to visualize and measure deformation parameters. Maximum strain value was measured at 45 µs after bubble collapse, presented with a distinct contour and coincided temporally and spatially with the liquid jet...
June 15, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28644763/methyltransferase-g9a-regulates-osteogenesis-via-twist-gene-repression
#8
N Higashihori, B Lehnertz, A Sampaio, T M Underhill, F Rossi, J M Richman
Here we investigate the role of epigenetic factors in controlling the timing of cranial neural crest cell differentiation. The gene coding for histone H3 lysine 9 methyltransferase G9A was conditionally deleted in neural crest cells with Wnt1-Cre. The majority of homozygous-null animals survived to birth but thereafter failed to thrive. Phenotypic analysis of postnatal animals revealed that the mutants displayed incomplete ossification and 20% shorter jaws as compared to their wild-type littermates. At E13...
June 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28644203/invasive-investigation-of-insular-cortex-epilepsy
#9
Philippe Ryvlin, Fabienne Picard
Invasive long-term EEG investigations of the insula have been performed since the mid-nineties in an expanding range of focal epilepsies suspected to involve the insular cortex. The various clinical forms of insular epilepsies were delineated during the last 2 decades, and include the following presentations: perisylvian epilepsy, temporal plus epilepsy, sleep hypermotor epilepsy, MRI-negative frontal and parietal lobe epilepsies, and insular lesions. In fact, a majority of complex stereoelectroencephalography procedures will include at least one electrode targeting the insula...
July 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/28644110/detailed-magnetic-resonance-imaging-features-of-a-case-series-of-primary-gliosarcoma
#10
Luísa Sampaio, Paulo Linhares, José Fonseca
Objective We aimed to characterise the magnetic resonance imaging (MRI) features of a case series of primary gliosarcoma, with the inclusion of diffusion-weighted imaging and perfusion imaging with dynamic susceptibility contrast MRI. Materials and methods We conducted a retrospective study of cases of primary gliosarcoma from the Pathology Department database from January 2006 to December 2014. Clinical and demographic data were obtained. Two neuroradiologists, blinded to diagnosis, assessed tumour location, signal intensity in T1 and T2-weighted images, pattern of enhancement, diffusion-weighted imaging and dynamic susceptibility contrast MRI studies on preoperative MRI...
January 1, 2017: Neuroradiology Journal
https://www.readbyqxmd.com/read/28642686/transcranial-random-noise-stimulation-trns-shapes-the-processing-of-rapidly-changing-auditory-information
#11
Katharina S Rufener, Philipp Ruhnau, Hans-Jochen Heinze, Tino Zaehle
Neural oscillations in the gamma range are the dominant rhythmic activation pattern in the human auditory cortex. These gamma oscillations are functionally relevant for the processing of rapidly changing acoustic information in both speech and non-speech sounds. Accordingly, there is a tight link between the temporal resolution ability of the auditory system and inherent neural gamma oscillations. Transcranial random noise stimulation (tRNS) has been demonstrated to specifically increase gamma oscillation in the human auditory cortex...
2017: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/28642288/ferumoxytol-enhanced-magnetic-resonance-imaging-assessing-inflammation-after-myocardial-infarction
#12
Colin G Stirrat, Shirjel R Alam, Thomas J MacGillivray, Calum D Gray, Marc R Dweck, Jennifer Raftis, William Sa Jenkins, William A Wallace, Renzo Pessotto, Kelvin Hh Lim, Saeed Mirsadraee, Peter A Henriksen, Scott Ik Semple, David E Newby
OBJECTIVES: Macrophages play a central role in the cellular inflammatory response to myocardial infarction (MI) and predict subsequent clinical outcomes. We aimed to assess temporal changes in cellular inflammation and tissue oedema in patients with acute MI using ultrasmallsuperparamagnetic particles of iron oxide (USPIO)-enhanced MRI. METHODS: Thirty-one patients were recruited following acute MI and followed up for 3 months with repeated T2 and USPIO-enhanced T2*-mapping MRI...
June 22, 2017: Heart: Official Journal of the British Cardiac Society
https://www.readbyqxmd.com/read/28642017/patterns-of-care-and-temporal-trends-in-ischemic-stroke-management-a-brazilian-perspective
#13
Monique Bueno Alves, Gisele Sampaio Silva, Renata Carolina Acri Miranda, Rodrigo Meireles Massaud, Andreia Maria Heins Vaccari, Miguel Cendoroglo-Neto, Solange Diccini
BACKGROUND AND PURPOSE: Demonstration of an improvement process of quality indicators in stroke care is essential to obtain certification as a primary stroke center (PSC). Our aim was to evaluate factors that influence temporal trends in quality indicators of ischemic stroke (IS) in a Brazilian hospital. METHODS: We evaluated patients discharged with IS from a tertiary hospital from January 2009 to December 2013. Ten predefined performance measures selected by the Get With the Guidelines-Stroke program were assessed...
June 20, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/28641575/phylogenetic-and-paleobotanical-evidence-for-late-miocene-diversification-of-the-tertiary-subtropical-lineage-of-ivies-hedera-l-araliaceae
#14
V Valcárcel, B Guzmán, N G Medina, P Vargas, J Wen
BACKGROUND: Hedera (ivies) is one of the few temperate genera of the primarily tropical Asian Palmate group of the Araliaceae, which extends its range out of Asia to Europe and the Mediterranean basin. Phylogenetic and phylogeographic results suggested Asia as the center of origin and the western Mediterranean region as one of the secondary centers of diversification. The bird-dispersed fleshy fruits of ivies suggest frequent dispersal over long distances (e.g. Macaronesian archipelagos), although reducing the impact of geographic barriers to gene flow in mainland species...
June 22, 2017: BMC Evolutionary Biology
https://www.readbyqxmd.com/read/28641129/moderate-and-vigorous-physical-activity-patterns-among-marijuana-users-results-from-the-2007-2014-national-health-and-nutrition-examination-surveys
#15
Denise C Vidot, Jordan B Bispo, WayWay M Hlaing, Guillermo Prado, Sarah E Messiah
The relationship between marijuana use and recreational physical activity has yet to be explored in the United States. Our aim was to examine this relationship in a population-based sample of 20-to-59-year olds (N=12,618) using 2007-2014 National Health and Nutrition Examination Surveys. Marijuana use was categorized as never (reference group), past (previously but not within the last 30-days), and current (>1day in the last 30-days) use. Current users were further categorized based on frequency of use (light, moderate, and heavy users)...
June 13, 2017: Drug and Alcohol Dependence
https://www.readbyqxmd.com/read/28640923/how-much-detail-is-needed-in-modeling-a-transcranial-magnetic-stimulation-figure-8-coil-measurements-and-brain-simulations
#16
Petar I Petrov, Stefano Mandija, Iris E C Sommer, Cornelis A T van den Berg, Sebastiaan F W Neggers
BACKGROUND: Despite TMS wide adoption, its spatial and temporal patterns of neuronal effects are not well understood. Although progress has been made in predicting induced currents in the brain using realistic finite element models (FEM), there is little consensus on how a magnetic field of a typical TMS coil should be modeled. Empirical validation of such models is limited and subject to several limitations. METHODS: We evaluate and empirically validate models of a figure-of-eight TMS coil that are commonly used in published modeling studies, of increasing complexity: simple circular coil model; coil with in-plane spiral winding turns; and finally one with stacked spiral winding turns...
2017: PloS One
https://www.readbyqxmd.com/read/28640918/identifying-key-demographic-parameters-of-a-small-island-associated-population-of-indo-pacific-bottlenose-dolphins-reunion-indian-ocean
#17
Violaine Dulau, Vanessa Estrade, Jacques Fayan
Photo-identification surveys of Indo-Pacific bottlenose dolphins were conducted from 2009 to 2014 off Reunion Island (55°E33'/21°S07'), in the Indian Ocean. Robust Design models were applied to produce the most reliable estimate of population abundance and survival rate, while accounting for temporary emigration from the survey area (west coast). The sampling scheme consisted of a five-month (June-October) sampling period in each year of the study. The overall population size at Reunion was estimated to be 72 individuals (SE = 6...
2017: PloS One
https://www.readbyqxmd.com/read/28640913/temporal-patterns-of-deepwater-horizon-impacts-on-the-benthic-infauna-of-the-northern-gulf-of-mexico-continental-slope
#18
Michael G Reuscher, Jeffrey G Baguley, Nathan Conrad-Forrest, Cynthia Cooksey, Jeffrey L Hyland, Christopher Lewis, Paul A Montagna, Robert W Ricker, Melissa Rohal, Travis Washburn
The Deepwater Horizon oil spill occurred in spring and summer 2010 in the northern Gulf of Mexico. Research cruises in 2010 (approximately 2-3 months after the well had been capped), 2011, and 2014 were conducted to determine the initial and subsequent effects of the oil spill on deep-sea soft-bottom infauna. A total of 34 stations were sampled from two zones: 20 stations in the "impact" zone versus 14 stations in the "non-impact" zone. Chemical contaminants were significantly different between the two zones...
2017: PloS One
https://www.readbyqxmd.com/read/28640811/comparing-bee-species-responses-to-chemical-mixtures-common-response-patterns
#19
Alex Robinson, Helen Hesketh, Elma Lahive, Alice A Horton, Claus Svendsen, Agnes Rortais, Jean Lou Dorne, Jan Baas, Matthew S Heard, David J Spurgeon
Pollinators in agricultural landscapes can be exposed to mixtures of pesticides and environmental pollutants. Existing mixture toxicity modelling approaches, such as the models of concentration addition and independent action and the mechanistic DEBtox framework have been previously shown as valuable tools for understanding and ultimately predicting joint toxicity. Here we apply these mixture models to investigate the potential to interpret the effects of semi-chronic binary mixture exposure for three bee species: Apis mellifera, Bombus terrestris and Osmia bicornis within potentiation and mixture toxicity experiments...
2017: PloS One
https://www.readbyqxmd.com/read/28639807/the-impact-of-time-and-repeated-exposure-on-famous-person-knowledge-in-amnestic-mild-cognitive-impairment-and-alzheimer-s-disease
#20
Sophie Benoit, Isabelle Rouleau, Roxane Langlois, Valérie Dostie, Marie-Jeanne Kergoat, Sven Joubert
OBJECTIVE: Famous people knowledge has been shown to be impaired early in Alzheimer's disease (AD) and amnestic mild cognitive impairment (aMCI). However, the question of whether recently acquired knowledge is more impaired than remotely acquired knowledge remains a matter of debate. The aim of this study was to investigate the patterns of semantic memory impairment in aMCI and AD by investigating 2 factors that may influence the retrieval of such knowledge, namely remoteness and frequency of repetition of information over time...
June 22, 2017: Neuropsychology
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