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https://www.readbyqxmd.com/read/28324963/quantitative-assessment-of-arm-tremor-in-people-with-neurological-disorders
#1
Jeonghee Kim, Claire Parnell, Thomas Wichmann, Stephen P DeWeerth
Abnormal oscillatory movement (i.e. tremor) is usually evaluated with qualitative assessment by clinicians, and quantified with subjective scoring methods. These methods are often inaccurate. We utilized a quantitative and standardized task based on the Fitts' law to assess the performance of arm movement with tremor by controlling a gyration mouse on a computer. The experiment included the center-out tapping (COT) and rectangular track navigation (RTN) tasks. We report the results of a pilot study in which we collected the performance for healthy participants in whom tremor was simulated by imposing oscillatory movements to the arm with a vibration motor...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28319756/on-the-effect-of-networks-of-cycle-tracks-on-the-risk-of-cycling-the-case-of-seville
#2
R Marqués, V Hernández-Herrador
We analyze the evolution of the risk of cycling in Seville before and after the implementation of a network of segregated cycle tracks in the city. Specifically, we study the evolution of the risk for cyclists of being involved in a collision with a motor vehicle, using data reported by the traffic police along the period 2000-2013, i.e. seven years before and after the network was built. A sudden drop of such risk was observed after the implementation of the network of bikeways. We study, through a multilinear regression analysis, the evolution of the risk by means of explanatory variables representing changes in the built environment, specifically the length of the bikeways and a stepwise jump variable taking the values 0/1 before/after the network was implemented...
March 16, 2017: Accident; Analysis and Prevention
https://www.readbyqxmd.com/read/28319101/a-vibrio-cholerae-autoinducer-receptor-pair-that-controls-biofilm-formation
#3
Kai Papenfort, Justin E Silpe, Kelsey R Schramma, Jian-Ping Cong, Mohammad R Seyedsayamdost, Bonnie L Bassler
Quorum sensing (QS) is a cell-cell communication process that enables bacteria to track cell population density and orchestrate collective behaviors. QS relies on the production and detection of, and the response to, extracellular signal molecules called autoinducers. In Vibrio cholerae, multiple QS circuits control pathogenesis and biofilm formation. Here, we identify and characterize a new QS autoinducer-receptor pair. The autoinducer is 3,5-dimethylpyrazin-2-ol (DPO). DPO is made from threonine and alanine, and its synthesis depends on threonine dehydrogenase (Tdh)...
March 20, 2017: Nature Chemical Biology
https://www.readbyqxmd.com/read/28317843/winter-temperatures-limit-population-growth-rate-of-a-migratory-songbird
#4
Bradley K Woodworth, Nathaniel T Wheelwright, Amy E Newman, Michael Schaub, D Ryan Norris
Understanding the factors that limit and regulate wildlife populations requires insight into demographic and environmental processes acting throughout the annual cycle. Here, we combine multi-year tracking data of individual birds with a 26-year demographic study of a migratory songbird to evaluate the relative effects of density and weather at the breeding and wintering grounds on population growth rate. Our results reveal clear support for opposing forces of winter temperature and breeding density driving population dynamics...
March 20, 2017: Nature Communications
https://www.readbyqxmd.com/read/28317266/insect-immunity-varies-idiosyncratically-during-overwintering
#5
Laura V Ferguson, Brent J Sinclair
Overwintering insects face multiple stressors, including pathogen and parasite pressures that shift with seasons. However, we know little of how the insect immune system fluctuates with season, particularly in the overwintering period. To understand how immune activity changes across autumn, winter, and spring, we tracked immune activity of three temperate insects that overwinter as larvae: a weevil (Curculio sp., Coleoptera), gallfly (Eurosta solidaginis, Diptera), and larvae of the lepidopteran Pyrrharctia isabella...
March 20, 2017: Journal of Experimental Zoology. Part A, Ecological Genetics and Physiology
https://www.readbyqxmd.com/read/28317111/an-experimental-test-of-the-habitat-amount-hypothesis-for-saproxylic-beetles-in-a-forested-region
#6
Sebastian Seibold, Claus Bässler, Roland Brandl, Lenore Fahrig, Bernhard Förster, Marco Heurich, Torsten Hothorn, Fabian Scheipl, Simon Thorn, Jörg Müller
The habitat-amount hypothesis challenges traditional concepts that explain species richness within habitats, such as the habitat-patch hypothesis, where species number is a function of patch size and patch isolation. It posits that effects of patch size and patch isolation are driven by effects of sample area, and thus that the number of species at a site is basically a function of the total habitat amount surrounding this site. We tested the habitat-amount hypothesis for saproxylic beetles and their habitat of dead wood by using an experiment comprising 190 plots with manipulated patch sizes situated in a forested region with a high variation in habitat amount (i...
March 19, 2017: Ecology
https://www.readbyqxmd.com/read/28316289/post-stapedectomy-granuloma-a-devastating-complication
#7
E Watts, H R F Powell, S R Saeed, R M Irving
OBJECTIVES: This paper reports three cases of severe post-stapedectomy granuloma, emphasising the variable presentation of this devastating complication and the challenges of its management. METHODS: A retrospective review was conducted of three cases of post-stapedectomy granuloma requiring surgical debulking between 2010 and 2015. Clinical symptoms, serial imaging, histopathology and post-operative outcomes were considered. RESULTS: Intra-operatively, extensive granulation tissue with erosion of the otic capsule was found...
March 20, 2017: Journal of Laryngology and Otology
https://www.readbyqxmd.com/read/28316116/water-availability-drives-signatures-of-local-adaptation-in-whitebark-pine-pinus-albicaulis-englm-across-fine-spatial-scales-of-the-lake-tahoe-basin-usa
#8
Brandon M Lind, Christopher J Friedline, Jill L Wegrzyn, Patricia E Maloney, Detlev R Vogler, David B Neale, Andrew J Eckert
Patterns of local adaptation at fine spatial scales are central to understanding how evolution proceeds, and are essential to the effective management of economically and ecologically important forest tree species. Here, we employ single and multilocus analyses of genetic data (n = 116,231 SNPs) to describe signatures of fine-scale adaptation within eight whitebark pine (Pinus albicaulis Engelm.) populations across the local extent of the environmentally heterogeneous Lake Tahoe Basin, USA. We show that despite highly shared genetic variation (FST = 0...
March 17, 2017: Molecular Ecology
https://www.readbyqxmd.com/read/28315400/multicolor-flow-cytometry-and-multi-gene-next-generation-sequencing-are-complementary-and-highly-predictive-for-relapse-in-acute-myeloid-leukemia-following-allogeneic-transplant
#9
Bartlomiej M Getta, Sean M Devlin, Ross L Levine, Maria E Arcila, Abhinita S Mohanty, Ahmet Zehir, Martin S Tallman, Sergio A Giralt, Mikhail Roshal
Minimal Residual disease (MRD) in acute myeloid leukemia (AML) is typically measured using multi-parameter flow cytometry (MFC). Detection of leukemia mutations using multi-gene next generation sequencing (NGS) can potentially be used to measure residual disease. We used a targeted 28-gene NGS panel to detect mutations and different-from-normal 10-colour MFC to measure MRD in AML patients before allogeneic hematopoietic stem cell transplant (HCT). Residual disease was defined when any abnormal blast population was detected using MFC and when any leukemia allele was detected with a variant allele frequency (VAF) ≥5% using NGS...
March 14, 2017: Biology of Blood and Marrow Transplantation
https://www.readbyqxmd.com/read/28314954/retinal-and-choroidal-vascular-features-in-patients-with-retinitis-pigmentosa-imaged-by-oct-based-microangiography
#10
Kasra A Rezaei, Qinqin Zhang, Chieh-Li Chen, Jennifer Chao, Ruikang K Wang
PURPOSE: To image vascular features of retinitis pigmentosa (RP) using optical coherence tomography angiography (OCTA). METHODS: Patients with RP were imaged by spectral domain optical coherence tomography based angiography (OCTA). The optical microangiography (OMAG) algorithm was applied to scanned datasets to generate 3D OCTA retinal angiograms, i.e., OMAG angiograms. Motion tracking was used to minimize artifacts due to eye movement, and large field of view OMAG angiograms were achieved through a montage scanning protocol...
March 17, 2017: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/28314577/nanotubes-the-fast-track-to-treatment-of-dent-disease
#11
Thomas E Willnow
Studies in mice have suggested bone marrow transplantation as a strategy to correct the endocytic dysfunction of the proximal tubules in renal Fanconi syndrome, yet the mode of action has remained mysterious. Using a mouse model of Dent disease, Gabriel et al. now show that rescue of the resorptive capacity in the diseased kidney involves cell-to-cell contact between engrafted and host cells via nanotubes, cellular projections that enable transfer of wild-type activity into mutant cells of the proximal tubule...
April 2017: Kidney International
https://www.readbyqxmd.com/read/28306315/hard-two-photon-contribution-to-elastic-lepton-proton-scattering-determined-by-the-olympus-experiment
#12
B S Henderson, L D Ice, D Khaneft, C O'Connor, R Russell, A Schmidt, J C Bernauer, M Kohl, N Akopov, R Alarcon, O Ates, A Avetisyan, R Beck, S Belostotski, J Bessuille, F Brinker, J R Calarco, V Carassiti, E Cisbani, G Ciullo, M Contalbrigo, R De Leo, J Diefenbach, T W Donnelly, K Dow, G Elbakian, P D Eversheim, S Frullani, Ch Funke, G Gavrilov, B Gläser, N Görrissen, D K Hasell, J Hauschildt, Ph Hoffmeister, Y Holler, E Ihloff, A Izotov, R Kaiser, G Karyan, J Kelsey, A Kiselev, P Klassen, A Krivshich, I Lehmann, P Lenisa, D Lenz, S Lumsden, Y Ma, F Maas, H Marukyan, O Miklukho, R G Milner, A Movsisyan, M Murray, Y Naryshkin, R Perez Benito, R Perrino, R P Redwine, D Rodríguez Piñeiro, G Rosner, U Schneekloth, B Seitz, M Statera, A Thiel, H Vardanyan, D Veretennikov, C Vidal, A Winnebeck, V Yeganov
The OLYMPUS Collaboration reports on a precision measurement of the positron-proton to electron-proton elastic cross section ratio, R_{2γ}, a direct measure of the contribution of hard two-photon exchange to the elastic cross section. In the OLYMPUS measurement, 2.01 GeV electron and positron beams were directed through a hydrogen gas target internal to the DORIS storage ring at DESY. A toroidal magnetic spectrometer instrumented with drift chambers and time-of-flight scintillators detected elastically scattered leptons in coincidence with recoiling protons over a scattering angle range of ≈20° to 80°...
March 3, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28303743/incremental-comprehension-of-pitch-relationships-in-written-music-evidence-from-eye-movements
#13
Lauren V Hadley, Patrick Sturt, Tuomas Eerola, Martin J Pickering
To investigate how proficient pianists comprehend pitch relationships in written music when they first encounter it we conducted two experiments in which proficient pianists' eyes were tracked while they read and played single-line melodies. In Experiment 1, participants played at their own speed; in Experiment 2 they played with an external metronome. The melodies were either congruent or anomalous, with the anomaly involving one bar being shifted in pitch to alter the implied harmonic structure (e.g., non-resolution of a dominant)...
March 17, 2017: Quarterly Journal of Experimental Psychology: QJEP
https://www.readbyqxmd.com/read/28303635/incident-microalbuminuria-and-complement-factor-mannan-binding-lectin-associated-protein-19-in-people-with-newly-diagnosed-type-1-diabetes
#14
J A Ostergaard, S Thiel, I T Hoffmann-Petersen, P Hovind, H-H Parving, L Tarnow, P Rossing, T K Hansen
BACKGROUND: Evidence links the lectin pathway of complement activation to diabetic kidney disease. Upon carbohydrate-recognition by pattern-recognition molecules, e.g., mannan-binding lectin (MBL), the MBL-associated serine protease (MASP-2) is activated and initiates the complement cascade. The MASP2 gene encodes MASP-2 and the alternative splice product MBL-associated protein 19 (MAp19). Both MAp19 and MASP-2 circulate in complex with MBL. We tested the hypothesis that MAp19 and MASP-2 concentrations predict the risk of incident microalbuminuria...
March 16, 2017: Diabetes/metabolism Research and Reviews
https://www.readbyqxmd.com/read/28303615/rare-earth-elements-and-select-actinoids-in-the-canadian-house-dust-study
#15
Pat E Rasmussen, Christine Levesque, Marc Chénier, H David Gardner
Nationally representative baseline data are presented for rare earth elements (REE), plus thorium (Th) and uranium (U) in house dust sampled from 1025 urban homes, in units of concentrations (μg g(-1) ), loadings (μg m(-2) ) and loading rates (ng m(-2) day(-1) ). Spearman rank correlations indicate that, in addition to outdoor sources, consumer products and building materials can influence indoor dust concentrations of REE, Th and U. Correlations (p <0.01) with numbers of occupants, dogs and cats suggest soil track-in...
March 17, 2017: Indoor Air
https://www.readbyqxmd.com/read/28302596/estimating-accuracy-at-exercise-intensities-a-comparative-study-of-self-monitoring-heart-rate-and-physical-activity-wearable-devices
#16
Erin E Dooley, Natalie M Golaszewski, John B Bartholomew
BACKGROUND: Physical activity tracking wearable devices have emerged as an increasingly popular method for consumers to assess their daily activity and calories expended. However, whether these wearable devices are valid at different levels of exercise intensity is unknown. OBJECTIVE: The objective of this study was to examine heart rate (HR) and energy expenditure (EE) validity of 3 popular wrist-worn activity monitors at different exercise intensities. METHODS: A total of 62 participants (females: 58%, 36/62; nonwhite: 47% [13/62 Hispanic, 8/62 Asian, 7/62 black/ African American, 1/62 other]) wore the Apple Watch, Fitbit Charge HR, and Garmin Forerunner 225...
March 16, 2017: JMIR MHealth and UHealth
https://www.readbyqxmd.com/read/28302586/mantisbot-is-a-robotic-model-of-visually-guided-motion-in-the-praying-mantis
#17
Nicholas S Szczecinski, Andrew P Getsy, Joshua P Martin, Roy E Ritzmann, Roger D Quinn
Insects use highly distributed nervous systems to process exteroception from head sensors, compare that information with state-based goals, and direct posture or locomotion toward those goals. To study how descending commands from brain centers produce coordinated, goal-directed motion in distributed nervous systems, we have constructed a conductance-based neural system for our robot MantisBot, a 29 degree-of-freedom, 13.3:1 scale praying mantis robot. Using the literature on mantis prey tracking and insect locomotion, we designed a hierarchical, distributed neural controller that establishes the goal, coordinates different joints, and executes prey-tracking motion...
March 13, 2017: Arthropod Structure & Development
https://www.readbyqxmd.com/read/28301495/evaluation-of-micro-gps-receivers-for-tracking-small-bodied-mammals
#18
Laura A McMahon, Janet L Rachlow, Lisa A Shipley, Jennifer S Forbey, Timothy R Johnson, Peter J Olsoy
GPS telemetry markedly enhances the temporal and spatial resolution of animal location data, and recent advances in micro-GPS receivers permit their deployment on small mammals. One such technological advance, snapshot technology, allows for improved battery life by reducing the time to first fix via postponing recovery of satellite ephemeris (satellite location) data and processing of locations. However, no previous work has employed snapshot technology for small, terrestrial mammals. We evaluated performance of two types of micro-GPS (< 20 g) receivers (traditional and snapshot) on a small, semi-fossorial lagomorph, the pygmy rabbit (Brachylagus idahoensis), to understand how GPS errors might influence fine-scale assessments of space use and habitat selection...
2017: PloS One
https://www.readbyqxmd.com/read/28301296/distinct-leishmania-infantum-strains-circulate-in-humans-and-dogs-in-the-emilia-romagna-region-northeastern-italy
#19
Gianluca Rugna, Elena Carra, Francesco Corpus, Mattia Calzolari, Daniela Salvatore, Romeo Bellini, Antonietta Di Francesco, Erica Franceschini, Antonella Bruno, Giovanni Poglayen, Stefania Varani, Fabrizio Vitale, Giuseppe Merialdi
Human leishmaniasis is an emerging problem in Italy and is on the increase in the Emilia-Romagna region, northeastern part of the country. Nevertheless, studies dealing with the molecular characterization of Leishmania spp. circulating in these areas are limited. In the present work, we explored the genetic polymorphism of Leishmania isolates from 28 cases of canine leishmaniasis and three cases of human visceral leishmaniasis (VL), which occurred in 2013-2014 in the Emilia-Romagna region. The characterization was carried out in comparison with nine human isolates of Leishmania from other VL endemic Italian regions and two reference strains...
March 16, 2017: Vector Borne and Zoonotic Diseases
https://www.readbyqxmd.com/read/28301074/high-throughput-inclusion-body-sizing-nano-particle-tracking-analysis
#20
Wieland N Reichelt, Andreas Kaineder, Markus Brillmann, Lukas Neutsch, Alexander Taschauer, Hans Lohninger, Christoph Herwig
The expression of pharmaceutical relevant proteins in E. coli frequently triggers inclusion body (IB) formation caused by protein aggregation. In literature, substantial effort has been invested into the quantification of IB size. But up to this date particle based methods to analyze physical IB properties of representative numbers of IBs lack sensitivity and/or lack orthogonal verification. Using high pressure freezing and automated freeze substitution for transmission electron microscopy (TEM) the cytosolic inclusion body structure was preserved within the cells...
March 16, 2017: Biotechnology Journal
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