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https://www.readbyqxmd.com/read/28231031/different-serological-profiles-to-cooccurring-pathogenic-and-nonpathogenic-caliciviruses-in-wild-european-rabbits-oryctolagus-cuniculus-across-australia
#1
Tanya E Cox, June Liu, Remy van de Ven, Tanja Strive
Rabbit hemorrhagic disease virus (RHDV) was released in Australia as a biocontrol agent for wild European rabbits ( Oryctolagus cuniculus ) in 1995-96; however, its effects were variable across Australia with the greatest population reductions seen in lower annual rainfall areas (<400 mm). There is speculation that the reduced effectiveness observed at higher annual rainfall sites is at least partially due to the presence of a nonpathogenic calicivirus (RCV-A1). The RCV-A1 is related to RHDV and confers partial and transient protection against lethal RHDV infection in laboratory tests...
February 23, 2017: Journal of Wildlife Diseases
https://www.readbyqxmd.com/read/28230994/artifact-free-and-detection-profile-independent-higher-order-fluorescence-correlation-spectroscopy-for-microsecond-resolved-kinetics-1-multi-detector-and-sub-binning-approach
#2
Farshad Abdollah-Nia, Martin P Gelfand, Alan K Van Orden
Fluorescence correlation spectroscopy (FCS) is a powerful tool in the time-resolved analysis of non-reacting or reacting molecules in solution, based on fluorescence intensity fluctuations. However, conventional (second-order) FCS alone is insufficient to measure all parameters needed to describe a reaction or mixture, including concentrations, fluorescence brightnesses, and forward and reverse rate constants. For this purpose, correlations of higher powers of fluorescence intensity fluctuations can be calculated to yield additional information from the single-photon data stream collected in an FCS experiment...
February 23, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28218308/atom-based-sensing-of-weak-radio-frequency-electric-fields-using-homodyne-readout
#3
Santosh Kumar, Haoquan Fan, Harald Kübler, Jiteng Sheng, James P Shaffer
We utilize a homodyne detection technique to achieve a new sensitivity limit for atom-based, absolute radio-frequency electric field sensing of 5 μV cm(-1) Hz(-1/2). A Mach-Zehnder interferometer is used for the homodyne detection. With the increased sensitivity, we investigate the dominant dephasing mechanisms that affect the performance of the sensor. In particular, we present data on power broadening, collisional broadening and transit time broadening. Our results are compared to density matrix calculations...
February 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28213152/central-neuronal-motor-behaviour-in-skilled-and-less-skilled-novices-approaching-sports-specific-movement-techniques
#4
Tobias Vogt, Kouki Kato, Stefan Schneider, Stefan Türk, Kazuyuki Kanosue
Research on motor behavioural processes preceding voluntary movements often refers to analysing the readiness potential (RP). For this, decades of studies used laboratory setups with controlled sports-related actions. Further, recent applied approaches focus on athlete-non-athlete comparisons, omitting possible effects of training history on RP. However, RP preceding real sport-specific movements in accordance to skill acquisition remains to be elucidated. Therefore, after familiarization 16 right-handed males with no experience in archery volunteered to perform repeated sports-specific movements, i...
February 14, 2017: Human Movement Science
https://www.readbyqxmd.com/read/28211708/direct-observation-of-spatiotemporal-dynamics-of-short-electron-bunches-in-storage-rings
#5
C Evain, E Roussel, M Le Parquier, C Szwaj, M-A Tordeux, J-B Brubach, L Manceron, P Roy, S Bielawski
In recent synchrotron radiation facilities, the use of short (picosecond) electron bunches is a powerful method for producing giant pulses of terahertz coherent synchrotron radiation. Here we report on the first direct observation of these pulse shapes with a few picoseconds resolution, and of their dynamics over a long time. We thus confirm in a very direct way the theories predicting an interplay between two physical processes. Below a critical bunch charge, we observe a train of identical THz pulses (a broadband Terahertz comb) stemming from the shortness of the electron bunches...
February 3, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28208899/study-of-variation-in-intraocular-pressure-spike-iop-following-nd-yag-laser-capsulotomy
#6
Niharika K Shetty, Sriya Sridhar
INTRODUCTION: Posterior Capsular Opacifications (PCO) is a frequent complication of cataract surgery following posterior chamber intraocular lens implantation. Nd -Yag laser capsulotomy is the treatment of choice for PCO and is known to be associated with complications like Raised Intraocular Pressure (IOP), Intraocular lens pitting, intraocular lens cracks, cystoid macular oedema, retinal detachment, corneal burns. Raised IOP is the most common complication and prescribing anti-glaucoma drugs post capsulotomy is a common practise...
December 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28205347/robust-universal-nonrigid-motion-correction-framework-for-first-pass-cardiac-mr-perfusion-imaging
#7
Mitchel Benovoy, Matthew Jacobs, Farida Cheriet, Nagib Dahdah, Andrew E Arai, Li-Yueh Hsu
PURPOSE: To present and assess an automatic nonrigid image registration framework that compensates motion in cardiac magnetic resonance imaging (MRI) perfusion series and auxiliary images acquired under a wide range of conditions to facilitate myocardial perfusion quantification. MATERIALS AND METHODS: Our framework combines discrete feature matching for large displacement estimation with a dense variational optical flow formulation in a multithreaded architecture...
February 15, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28199041/feasibility-of-accelerated-simultaneous-multislice-diffusion-weighted-mri-of-the-prostate
#8
Jakob Weiss, Petros Martirosian, Jana Taron, Ahmed E Othman, Thomas Kuestner, Michael Erb, Jens Bedke, Fabian Bamberg, Konstantin Nikolaou, Mike Notohamiprodjo
PURPOSE: To assess the feasibility of simultaneous multislice (SMS) single-shot echo-planar-imaging (EPI) for accelerated diffusion-weighted imaging (DWI) of the prostate. MATERIALS AND METHODS: For phantom measurements a dedicated DWI phantom with different sucrose concentrations was used. In addition, 10 volunteers and 16 patients with suspected prostate cancer were examined for in vivo measurements. All examinations were performed with a 3T magnetic resonance imaging (MRI) system...
February 15, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28178149/combination-of-general-anesthesia-and-peripheral-nerve-block-with-low-dose-ropivacaine-reduces-postoperative-pain-for-several-days-after-outpatient-arthroscopy-a-randomized-controlled-clinical-trial
#9
Benedikt Büttner, Ashham Mansur, José Hinz, Joachim Erlenwein, Martin Bauer, Ingo Bergmann
BACKGROUND: Effective methods for postoperative pain relief are an important concern in outpatient surgery. For arthroscopies we combine a single-shot peripheral nerve block using low-volume, low-concentration ropivacaine with general anesthesia. We hypothesized that the patients would have less postoperative pain and be more rapidly home ready than after general anesthesia alone. METHODS: Patients (American Society of Anesthesiologists I-III, 18-80 years old) scheduled for outpatient arthroscopy on the upper or lower extremity were randomized to have either a combination of peripheral nerve block and general anesthesia (NB + GA, study group) or general anesthesia alone (GA, control group)...
February 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28171870/methylene-tetrahydrofolate-reductase-mthfr-rs868014-polymorphism-regulated-by-mir-1203-associates-with-risk-and-short-term-outcome-of-ischemic-stroke
#10
Wei He, Minzhi Lu, Guoqing Li, Zhigang Sun, Dinghua Liu, Lujun Gu
BACKGROUND/AIMS: Genetic polymorphisms of methylene tetrahydrofolate reductase (MTHFR) were associated with ischemic stroke risk. This study analyzed MTHFR polymorphisms at the 3'-untranslated region for association with risk and outcome of ischemic stroke in a Chinese Han population. METHODS: 500 patients and 600 healthy volunteers were enrolled for MTHFR rs868014 genotyping identified bioinformatically. The binding of miR-1203 to MTHFR rs868014 was determined by luciferase assay, MTHFR expression was assessed using qRT-PCR, and plasma homocysteine levels were assayed by ELISA...
February 8, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28167523/the-role-of-cyclic-di-gmp-and-exopolysaccharide-in-type-iv-pilus-dynamics
#11
Jan Ribbe, Amy E Baker, Sebstian Euler, George A O'Toole, Berenike Maier
For Pseudomonas aeruginosa the levels of cyclic di-GMP govern the transition from the planktonic state to biofilm formation. Type IV pili (T4P) are crucial determinants of biofilm structure and dynamics, but it is unknown how the levels of c-di-GMP affect pilus dynamics. Here, we scrutinized how c-di-GMP affects molecular motor properties and adhesive behavior of T4P. By means of retraction, T4P generated forces of ∼ 30 pN. Deletion mutants in the proteins with known roles in biofilm formation, swarming motility and exopolysaccharide (EPS) production, specifically, the diguanulate cyclases sadC and roeA or the c-di-GMP phosphodiesterase bifA, showed only modest effects on velocity or force of T4P retraction...
February 6, 2017: Journal of Bacteriology
https://www.readbyqxmd.com/read/28160227/assessment-of-brain-core-temperature-using-mr-dwi-thermometry-in-alzheimer-disease-patients-compared-to-healthy-subjects
#12
Gianvincenzo Sparacia, Koji Sakai, Kei Yamada, Giovanna Giordano, Rosalia Coppola, Massimo Midiri, Luigi Maria Grimaldi
PURPOSE: To assess the brain core temperature of Alzheimer disease (AD) patients in comparison with healthy volunteers using diffusion-weighted thermometry. MATERIALS AND METHODS: Fourteen AD patients (3 men, 11 women; age range 60-81 years, mean age 73.8 ± 6.1 years) and 14 healthy volunteers, age and sex-matched (mean age 70.1 ± 6.9 years; range 62-84 years; 5 men, 9 women) underwent MR examination between February 2014 and March 2016. MR imaging studies were performed with a 1...
February 3, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28159042/influence-of-lower-limb-rotation-on-hindfoot-alignment-using-a-conventional-two-dimensional-radiographic-technique
#13
L Baverel, J Brilhault, G Odri, M Boissard, François Lintz
BACKGROUND: Rotation is one of the variables explaining lack of reproducibility in assessing hindfoot alignment. The hypothesis for this study was that a mathematical model predicts how this modifies radiographic hindfoot alignment measurements. METHODS: A cadaveric lower limb, disjointed at knee level, was used. Sagittal and coronal planes were fixed using a custom clamp. Standard AP views were shot every five degrees and measured hindfoot alignments were compared to theoretical values obtained from a mathematical simulation...
March 2017: Foot and Ankle Surgery: Official Journal of the European Society of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/28154911/comparative-performance-of-non-contrast-mri-with-haste-vs-contrast-enhanced-mri-3d-mrcp-for-possible-choledocholithiasis-in-hospitalized-patients
#14
Stella K Kang, Laura Heacock, Ankur M Doshi, Justin R Ream, Jeffrey Sun, James S Babb
PURPOSE: To compare the performance of non-contrast MRI with half-Fourier acquisition single-shot turbo spin echo (HASTE) vs. contrast-enhanced MRI/3D-MRCP for assessment of suspected choledocholithiasis in hospitalized patients. METHODS AND MATERIALS: 123 contrast-enhanced abdominal MRI/MRCP scans in the hospital setting for possible choledocholithiasis were retrospectively evaluated. Endoscopic retrograde cholangiopancreatography, intraoperative cholangiogram or documented clinical resolution served as the reference standard...
February 2, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28152240/spatiotemporal-alignment-of-in-utero-bold-mri-series
#15
Esra Abaci Turk, Jie Luo, Borjan Gagoski, Javier Pascau, Carolina Bibbo, Julian N Robinson, P Ellen Grant, Elfar Adalsteinsson, Polina Golland, Norberto Malpica
PURPOSE: To present a method for spatiotemporal alignment of in-utero magnetic resonance imaging (MRI) time series acquired during maternal hyperoxia for enabling improved quantitative tracking of blood oxygen level-dependent (BOLD) signal changes that characterize oxygen transport through the placenta to fetal organs. MATERIALS AND METHODS: The proposed pipeline for spatiotemporal alignment of images acquired with a single-shot gradient echo echo-planar imaging includes 1) signal nonuniformity correction, 2) intravolume motion correction based on nonrigid registration, 3) correction of motion and nonrigid deformations across volumes, and 4) detection of the outlier volumes to be discarded from subsequent analysis...
February 2, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28152227/3d-myocardial-t1-mapping-using-saturation-recovery
#16
Giovanna Nordio, Markus Henningsson, Amedeo Chiribiri, Adriana D M Villa, Torben Schneider, René M Botnar
PURPOSE: To propose a 3D quantitative high-resolution T1 mapping technique, called 3D SASHA (saturation-recovery single-shot acquisition), which combines a saturation recovery pulse with 1D-navigator-based-respiratory motion compensation to acquire the whole volume of the heart in free breathing. The sequence was tested and validated both in a T1 phantom and in healthy subjects. MATERIALS AND METHODS: The 3D SASHA method was implemented on a 1.5T scanner. A diaphragmatic navigator was used to allow free-breathing acquisition and the images were acquired with a resolution of 1...
February 2, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28149401/transfer-of-mechanical-energy-during-the-shot-put
#17
Michalina Błażkiewicz, Barbara Łysoń, Adam Chmielewski, Andrzej Wit
The aim of this study was to analyse transfer of mechanical energy between body segments during the glide shot put. A group of eight elite throwers from the Polish National Team was analysed in the study. Motion analysis of each throw was recorded using an optoelectronic Vicon system composed of nine infrared camcorders and Kistler force plates. The power and energy were computed for the phase of final acceleration of the glide shot put. The data were normalized with respect to time using the algorithm of the fifth order spline and their values were interpolated with respect to the percentage of total time, assuming that the time of the final weight acceleration movement was different for each putter...
September 1, 2016: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28148907/seroprevalence-of-toxoplasma-gondii-in-hunted-wild-boars-sus-scrofa-from-southeastern-france
#18
Cedric Roqueplo, Radu Blaga, Marie Jean-Lou, Isabelle Vallee, Bernard Davoust
Toxoplasma gondii (Nicolle et Manceaux, 1908) is an obligate intracellular, parasitic protozoan within the phylum Apicomplexa that causes toxoplasmosis in mammalian hosts (including humans) and birds. Since meat of wild boar, Sus scrofa (Linnaeus), has been demonstrated to be a potential source of human infection, a careful evaluation of the prevalence of infection with T. gondii in hunted animals is needed to protect public health. In the Var area in southeastern France, we performed a spatio-temporal survey in order to investigate the prevalence of IgG antibodies in wild boars shot by hunters in the Canjuers military camp during two subsequent hunting seasons...
January 25, 2017: Folia Parasitologica
https://www.readbyqxmd.com/read/28125544/acute-effect-of-countermovement-jumping-on-throwing-performance-in-track-and-field-athletes-during-competition
#19
Giorgos P Karampatsos, Panagiotis G Korfiatis, Nikolaos D Zaras, Giorgos V Georgiadis, Gerasimos D Terzis
Karampatsos, GP, Korfiatis, PG, Zaras, ND, Georgiadis, GV, and Terzis, GD. Acute effect of countermovement jumping on throwing performance in track and field athletes during competition. J Strength Cond Res 32(1): 359-364, 2017-The purpose of the study was to investigate whether performing 3 consecutive countermovement jumps (CMJs) just before an attempt enhances performance in track and field throwers during competition. Twelve shot putters, 8 hammer throwers, 9 discus throwers, and 3 javelin throwers of both sexes participated in the study...
February 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28114420/inferring-the-chemotactic-strategy-of-p-putida-and-e-coli-using-modified-kramers-moyal-coefficients
#20
Oliver Pohl, Marius Hintsche, Zahra Alirezaeizanjani, Maximilian Seyrich, Carsten Beta, Holger Stark
Many bacteria perform a run-and-tumble random walk to explore their surrounding and to perform chemotaxis. In this article we present a novel method to infer the relevant parameters of bacterial motion from experimental trajectories including the tumbling events. We introduce a stochastic model for the orientation angle, where a shot-noise process initiates tumbles, and analytically calculate conditional moments, reminiscent of Kramers-Moyal coefficients. Matching them with the moments calculated from experimental trajectories of the bacteria E...
January 2017: PLoS Computational Biology
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