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https://www.readbyqxmd.com/read/28730881/comparison-of-jump-landing-protocols-with-biodex-balance-system-as-measures-of-dynamic-postural-stability-in-athletes
#1
Zarko Krkeljas
The objective of the study was to determine whether a relationship exists between the two common methods for assessing postural stability in athletes: the time-to-stabilisation (TTS) via force-plate and the Biodex Balance System (BBS). The conditions under which these measurements assess dynamic postural control may not provide sufficient feedback to practitioners. Fourty-four amateur soccer players with no history of musculoskeletal disorders volunteered for the study. Pearson correlation was used to compare the anterior-posterior (AP), medio-lateral (ML), and the overall stability indexes measured by BBS, with the corresponding parameters of TTS assessed via force plate...
July 21, 2017: Sports Biomechanics
https://www.readbyqxmd.com/read/28728972/numerical-characterisation-of-one-step-and-three-step-solar-air-heating-collectors-used-for-cocoa-bean-solar-drying
#2
Elder Mendoza Orbegoso, Rafael Saavedra, Daniel Marcelo, Raúl La Madrid
In the northern coastal and jungle areas of Peru, cocoa beans are dried using artisan methods, such as direct exposure to sunlight. This traditional process is time intensive, leading to a reduction in productivity and, therefore, delays in delivery times. The present study was intended to numerically characterise the thermal behaviour of three configurations of solar air heating collectors in order to determine which demonstrated the best thermal performance under several controlled operating conditions. For this purpose, a computational fluid dynamics model was developed to describe the simultaneous convective and radiative heat transfer phenomena under several operation conditions...
July 17, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28728206/-subaxial-cervical-spine-injuries-treatment-recommendations-of-the-german-orthopedic-and-trauma-society
#3
Philipp Schleicher, Matti Scholz, Frank Kandziora, Andreas Badke, Florian Hans Brakopp, Helmut Klaus Friedrich Ekkerlein, Erol Gercek, Rene Hartensuer, Philipp Hartung, Jan-Sven Gilbert Jarvers, Philipp Kobbe, Stefan Matschke, Robert Morrison, Christian W Müller, Miguel Pishnamaz, Maximilian Reinhold, Klaus John Schnake, Gregor Schmeiser, Gregor Stein, Bernhard Ullrich, Thomas Weiß, Volker Zimmermann
In a consensus process during four sessions in 2016, the working group "lower cervical spine" of the German Society for Orthopedic and Trauma Surgery (DGOU), formulated "Therapeutic Recommendations for the Lower Cervical Spine", taking into consideration the current literature. Therapeutic goals are a permanently stable, painless cervical spine and the protection against secondary neurologic damage while retaining the greatest possible amount of motion and spinal profile. Due to its ease of use and its proven good reliability, the AOSpine classification for subaxial cervical injuries should be used...
July 20, 2017: Zeitschrift Für Orthopädie und Unfallchirurgie
https://www.readbyqxmd.com/read/28728009/bridged-rebar-graphene-functionalized-aptasensor-for-pathogenic-e-coli-o78-k80-h11-detection
#4
Harmanjit Kaur, Munish Shorie, Manju Sharma, Ashok K Ganguli, Priyanka Sabherwal
We report a novel fabrication method of functionalised Bridged Rebar Graphene (BRG) onto newly designed nanostructured aptasensor for label free impedimetric sensing of pathogenic bacteria E. coli O78:K80:H11. The chemical facilitated unscrolling of MWCNT and subsequent bridging with terephthalaldehyde (TPA) to form 3D-hierarchical BRG nanoconstruct exhibited synergistic effect by combining enhanced electrical properties and facile chemical functionality for stable bio-interface. The bacteria-DNA interactions were captured on BRG nanostructured electrode by using specific anti-E...
July 5, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28727435/wettability-effect-on-evaporation-dynamics-and-crystalline-patterns-of-sessile-saline-droplets
#5
Xin Zhong, Junheng Ren, Fei Duan
The evaporative dynamics and crystalline patterns from sessile saline droplets on various substrates are experimentally investigated. On the silicon wafer and polymethyl methacrylate (PMMA) plate, the saline droplets exhibit unique evaporative dynamics such that the contact angle keeps increasing for a lasting period. Such an enlargement in contact angle is attenuated at a higher salt concentration. Interestingly, the onset of precipitation is almost overlapped with the end of contact angle enlargement when the contact angle reaches its apex...
July 20, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28721735/dynamic-color-displays-using-stepwise-cavity-resonators
#6
Yiqin Chen, Xiaoyang Duan, Marcus Matuschek, Yanming Zhou, Frank Neubrech, Huigao Duan, Na Liu
High-resolution multicolor printing based on pixelated optical nanostructures is of great importance for promoting advances in color display science. So far, most of the work in this field has been focused on achieving static colors, limiting many potential applications. This inevitably calls for the development of dynamic color displays with advanced and innovative functionalities. In this Letter, we demonstrate a novel dynamic color printing scheme using magnesium-based pixelated Fabry-Pérot cavities by grey-scale nanolithography...
July 19, 2017: Nano Letters
https://www.readbyqxmd.com/read/28720731/an-in-vitro-chicken-gut-model-demonstrates-transfer-of-a-multidrug-resistance-plasmid-from-salmonella-to-commensal-escherichia-coli
#7
Roderick M Card, Shaun A Cawthraw, Javier Nunez-Garcia, Richard J Ellis, Gemma Kay, Mark J Pallen, Martin J Woodward, Muna F Anjum
The chicken gastrointestinal tract is richly populated by commensal bacteria that fulfill various beneficial roles for the host, including helping to resist colonization by pathogens. It can also facilitate the conjugative transfer of multidrug resistance (MDR) plasmids between commensal and pathogenic bacteria which is a significant public and animal health concern as it may affect our ability to treat bacterial infections. We used an in vitro chemostat system to approximate the chicken cecal microbiota, simulate colonization by an MDR Salmonella pathogen, and examine the dynamics of transfer of its MDR plasmid harboring several genes, including the extended-spectrum beta-lactamase blaCTX-M1 We also evaluated the impact of cefotaxime administration on plasmid transfer and microbial diversity...
July 18, 2017: MBio
https://www.readbyqxmd.com/read/28719742/integrated-smartphone-app-chip-system-for-on-site-ppb-level-colorimetric-quantitation-of-aflatoxins
#8
Xiaochun Li, Fan Yang, Jessica X H Wong, Hua-Zhong Yu
We demonstrate herein an integrated, smartphone-app-chip (SPAC) system for on-site quantitation of food toxins, as demonstrated with aflatoxin B1 (AFB1), at parts-per-billion (ppb) level in food products. The detection is based on an indirect competitive immunoassay fabricated on a transparent plastic chip with the assistance of a microfluidic channel plate. A 3D-printed optical accessory attached to a smartphone is adapted to align the assay chip and to provide uniform illumination for imaging, with which high-quality images of the assay chip are captured by the smartphone camera and directly processed using a custom-developed Android app...
July 18, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28718064/contribution-of-circulatory-disturbances-in-subchondral-bone-to-the-pathophysiology-of-osteoarthritis
#9
REVIEW
Roy K Aaron, Jennifer Racine, Jonathan P Dyke
PURPOSE OF REVIEW: This review describes the contributions of abnormal bone circulation to the pathophysiology of osteoarthritis. Combining dynamic imaging with MRI and PET with previous observations reveals that venous stasis and a venous outlet syndrome is most likely the key circulatory pathology associated with the initiation or progression of osteoarthritis. RECENT FINDINGS: MRI and PET have revealed that venous outflow obstruction results in physicochemical changes in subchondral bone to which osteoblasts are responsive...
August 2017: Current Rheumatology Reports
https://www.readbyqxmd.com/read/28716374/high-throughput-quantitation-of-fc-containing-recombinant-proteins-in-cell-culture-supernatant-by-fluorescence-polarization-spectroscopy
#10
Ben Thompson, Jerry Clifford, Mike Jenns, Andrew Smith, Ray Field, Kalpana Nayyar, David C James
Measurement of recombinant protein product titer critically underpins all biopharmaceutical manufacturing process development, as well as diverse research and discovery activity. Here, we describe a simple rapid (<2 min per 96 samples) 96-well microplate-based assay that enables high-throughput quantitation of recombinant immunoglobulin G and Fc-containing IgG derivatives in mammalian cell culture supernatant over a wide dynamic range of 2.5-80 mg/L, using microplate fluorescence polarization (FP) spectroscopy...
July 14, 2017: Analytical Biochemistry
https://www.readbyqxmd.com/read/28714826/effects-of-peroneal-muscles-fatigue-on-dynamic-stability-following-lateral-hop-landing-time-to-stabilization-vs-dynamic-postural-stability-index
#11
Kazem Malmir, Gholam Reza Olyaei, Saeed Talebian, Ali Ashraf Jamshidi, Majid Ashraf Ganguie
CONTEXT: Dynamic stability is a necessary requirement in many sports competitions. Muscle fatigue, which can impair stability, may be occurred in many sports competitions in which lateral movements and landing repeated frequently. OBJECTIVE: To assess the effects of peroneal muscles fatigue on dynamic stability following lateral hop landing through measuring time to stabilization (TTS) and dynamic postural stability index (DPSI). DESIGN: Quasi-experimental...
July 17, 2017: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/28712173/surgical-site-infection-in-orthopaedic-implants-and-its-common-bacteria-with-their-sensitivities-to-antibiotics-in-open-reduction-internal-fixation
#12
Muhammad Qaisar Shah, Muhammad Shoib Zardad, Alamzeb Khan, Sajjad Ahmed, Abdus Saboor Awan, Taj Mohammad
BACKGROUND: Surgical site infection in orthopaedic implants is a major problem, causing long hospital stay, cost to the patient and is a burden on health care facilities. It increases rate of nonunion, osteomyelitis, implant failure, sepsis, multiorgan dysfunction and even death. Surgical site infection is defined as pain, erythema, swelling and discharge from wound site. Surgical site infection in orthopaedic implants is more challenging to the treating orthopaedic surgeon as the causative organism is protected by a biofilm over the implant's surface...
January 2017: Journal of Ayub Medical College, Abbottabad: JAMC
https://www.readbyqxmd.com/read/28709228/direct-numerical-simulation-of-an-arbitrarily-shaped-particle-at-a-fluidic-interface
#13
Gregory Lecrivain, Ryoichi Yamamoto, Uwe Hampel, Takashi Taniguchi
A consistent formulation is presented for the direct numerical simulation of an arbitrarily shaped colloidal particle at a deformable fluidic interface. The rigid colloidal particle is decomposed into a collection of solid spherical beads and the three-phase boundaries are replaced with smoothly spreading interfaces. The major merit of the present formulation lies in the ease with which the geometrical decomposition of the colloidal particle is implemented, yet allows the dynamic simulation of intricate three-dimensional colloidal shapes in a binary fluid...
June 2017: Physical Review. E
https://www.readbyqxmd.com/read/28705189/a-biomechanical-comparison-of-conventional-dynamic-compression-plates-and-string-of-pearls%C3%A2-locking-plates-using-cantilever-bending-in-a-canine-ilial-fracture-model
#14
Allison R Kenzig, James R Butler, Lauren B Priddy, Kristen R Lacy, Steven H Elder
BACKGROUND: Fracture of the ilium is common orthopedic injury that often requires surgical stabilization in canine patients. Of the various methods of surgical stabilization available, application of a lateral bone plate to the ilium is the most common method of fixation. Many plating options are available, each having its own advantages and disadvantages. The purpose of this study was to evaluate the biomechanical properties of a 3.5 mm String-of-Pearls™ plate and a 3.5 mm dynamic compression plate in a cadaveric canine ilial fracture model...
July 13, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/28701712/use-of-single-frequency-impedance-spectroscopy-to-characterize-the-growth-dynamics-of-biofilm-formation-in-pseudomonas-aeruginosa
#15
Jozef B J H van Duuren, Mathias Müsken, Bianka Karge, Jürgen Tomasch, Christoph Wittmann, Susanne Häussler, Mark Brönstrup
Impedance spectroscopy has been applied in prokaryotic and eukaryotic cytometry as a label-free method for the investigation of adherent cells. In this paper, its use for characterizing the growth dynamics of P. aeruginosa biofilms is described and compared to crystal violet staining and confocal microscopy. The method allows monitoring the growth of biofilm-forming P. aeruginosa in a continuous and label-free manner over a period of 72 h in a 96 well plate format. Impedance curves obtained for P. aeruginosa PA14 wild type and mutant strains with a transposon insertion in pqsA and pelA genes exhibited distinct phases...
July 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28700652/anomalous-diffusion-and-q-weibull-velocity-distributions-in-epithelial-cell-migration
#16
Tatiane Souza Vilela Podestá, Tiago Venzel Rosembach, Anésia Aparecida Dos Santos, Marcelo Lobato Martins
In multicellular organisms, cell motility is central in all morphogenetic processes, tissue maintenance, wound healing and immune surveillance. Hence, the control of cell motion is a major demand in the creation of artificial tissues and organs. Here, cell migration assays on plastic 2D surfaces involving normal (MDCK) and tumoral (B16F10) epithelial cell lines were performed varying the initial density of plated cells. Through time-lapse microscopy quantities such as speed distributions, velocity autocorrelations and spatial correlations, as well as the scaling of mean-squared displacements were determined...
2017: PloS One
https://www.readbyqxmd.com/read/28689808/effectiveness-of-sonography-assisted-minimal-invasive-plate-osteosynthesis-mipo-compare-with-fluoroscope-assisted-in-femoral-shaft-fracture-a-cadaveric-study
#17
Jirawat Saengsin, Tanawat Vaseenon, Nuttaya Pattamapaspong, Apipop Kritsaneephaiboon
INTRODUCTION: A minimal invasive plate osteosynthesis (MIPO) has an advantage of biological soft tissue preservation that consists of preserving bony blood supply, fracture hematoma and less soft tissue damage which leads to decreasing of infection rate and rapid bone healing. However, the radiation exposure is still a disadvantage of this technique. A sonography that provides dynamic real time imaging may be used as an alternative technique for assisting MIPO. The aim of this study was to compare the effectiveness of MIPO in femoral shaft fracture between the sonography assisted and the fluoroscopy assisted...
July 5, 2017: Injury
https://www.readbyqxmd.com/read/28688410/a-new-electron-ion-coincidence-3d-momentum-imaging-method-and-its-application-in-probing-strong-field-dynamics-of-2-phenylethyl-n-n-dimethylamine
#18
Lin Fan, Suk Kyoung Lee, Yi-Jung Tu, Benoît Mignolet, David Couch, Kevin Dorney, Quynh Nguyen, Laura Wooldridge, Margaret Murnane, Françoise Remacle, H Bernhard Schlegel, Wen Li
We report the development of a new three-dimensional (3D) momentum-imaging setup based on conventional velocity map imaging to achieve the coincidence measurement of photoelectrons and photo-ions. This setup uses only one imaging detector (microchannel plates (MCP)/phosphor screen) but the voltages on electrodes are pulsed to push both electrons and ions toward the same detector. The ion-electron coincidence is achieved using two cameras to capture images of ions and electrons separately. The time-of-flight of ions and electrons are read out from MCP using a digitizer...
July 7, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28688405/ion-ion-coincidence-imaging-at-high-event-rate-using-an-in-vacuum-pixel-detector
#19
Jingming Long, Federico J Furch, Judith Durá, Anton S Tremsin, John Vallerga, Claus Peter Schulz, Arnaud Rouzée, Marc J J Vrakking
A new ion-ion coincidence imaging spectrometer based on a pixelated complementary metal-oxide-semiconductor detector has been developed for the investigation of molecular ionization and fragmentation processes in strong laser fields. Used as a part of a velocity map imaging spectrometer, the detection system is comprised of a set of microchannel plates and a Timepix detector. A fast time-to-digital converter (TDC) is used to enhance the ion time-of-flight resolution by correlating timestamps registered separately by the Timepix detector and the TDC...
July 7, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28686901/noncalssical-multiscale-modeling-of-ssdna-manipulation-using-a-cnt-nanocarrier-based-on-afm
#20
M H Korayem, M Estaji, A Homayooni
Nanocarriers are useful tools in biological and medical research fields. In nanomanipulation, a nondestructive and successful process can be achieved by using nanocarriers. In this paper, a nonclassical multiscale approach has been presented for modeling a single strand DNA (ssDNA) manipulation based on AFM. To achieve a nondestructive nanomanipulation process, carbon nanotube (CNT) has been used as a nanocarrier. AFM setup has been separated into a Micro field (MF) and a Nano field (NF). The governing equations of the MF have been derived based on Kirchhoff plate model and a modified couple stress theory...
June 24, 2017: Colloids and Surfaces. B, Biointerfaces
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