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https://www.readbyqxmd.com/read/28445904/-are-there-sex-differences-regarding-ski-length-to-height-ratio-ski-length-to-weight-ratio-sidecut-radius-and-ski-boot-sole-abrasion-among-acl-injured-male-and-female-skiers
#1
Markus Posch, Gerhard Ruedl, Katja Tecklenburg, Kenneth Helle, Alois Schranz, Martin Burtscher
Introduction Female skiers suffer from knee injuries twice as much as male skiers, and the risk of an injury to the anterior cruciate ligament (ACL) is three times greater among females compared to males. The sex-specific ACL injury risk depends on internal (e. g. age, skiing skills, fitness level) and external (e. g. slope and weather conditions, ski equipment) factors. However, it is not clear whether male and female recreational skiers with an ACL injury differ regarding the sidecut radius and ski boot sole abrasion...
April 26, 2017: Sportverletzung Sportschaden: Organ der Gesellschaft Für Orthopädisch-Traumatologische Sportmedizin
https://www.readbyqxmd.com/read/28445750/effect-of-phosphorylation-on-a-human-like-osteopontin-peptide
#2
Samuel Lenton, Marco Grimaldo, Felix Roosen-Runge, Frank Schreiber, Tommy Nylander, Roger Clegg, Carl Holt, Michael Härtlein, Victoria García Sakai, Tilo Seydel, Susana C Marujo Teixeira
The last decade established that the dynamic properties of the phosphoproteome are central to function and its modulation. The temporal dimension of phosphorylation effects remains nonetheless poorly understood, particularly for intrinsically disordered proteins. Osteopontin, selected for this study due to its key role in biomineralization, is expressed in many species and tissues to play a range of distinct roles. A notable property of highly phosphorylated isoforms of osteopontin is their ability to sequester nanoclusters of calcium phosphate to form a core-shell structure, in a fluid that is supersaturated but stable...
April 25, 2017: Biophysical Journal
https://www.readbyqxmd.com/read/28444839/age-dependent-alterations-in-osteoblast-and-osteoclast-activity-in-human-cancellous-bone
#3
Mustafa Becerikli, Henriette Jaurich, Jessica Schira, Matthias Schulte, Carmen Döbele, Christoph Wallner, Stephanie Abraham, Johannes M Wagner, Mehran Dadras, Ulrich Kneser, Marcus Lehnhardt, Björn Behr
It is assumed that the activity of osteoblasts and osteoclasts is decreased in bone tissue of aged individuals. However, detailed investigation of the molecular signature of human bone from young compared to aged individuals confirming this assumption is lacking. In this study, quantitative expression analysis of genes related to osteogenesis and osteoclastogenesis of human cancellous bone derived from the distal radius of young and aged individuals was performed. Furthermore, we additionally performed immunohistochemical stainings...
April 26, 2017: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/28444580/three-dimensional-virtual-planning-of-corrective-osteotomies-of-distal-radius-malunions-a-systematic-review-and-meta-analysis
#4
REVIEW
R J O de Muinck Keizer, K M Lechner, M A M Mulders, N W L Schep, D Eygendaal, J C Goslings
The purpose of this study was to summarize and evaluate results of three-dimensional (3D-) planned corrective osteotomies of malunited distal radius fractures. 3D-planning techniques provide the possibility to address 3D-deformity that conventional planning methods might not address. We systematically searched PubMed, EMBASE and the Cochrane library for studies that performed a 3D-planned corrective osteotomy on patients with a malunited distal radius fracture. Fifteen studies with a total of 68 patients were included in the analysis...
April 25, 2017: Strategies in Trauma and Limb Reconstruction
https://www.readbyqxmd.com/read/28443874/inertial-migration-and-axial-control-of-deformable-capsules
#5
Christian Schaaf, Holger Stark
The mechanical deformability of single cells is an important indicator for various diseases such as cancer, blood diseases and inflammation. Lab-on-a-chip devices allow to separate such cells from healthy cells using hydrodynamic forces. We perform hydrodynamic simulations based on the lattice-Boltzmann method and study the behavior of an elastic capsule in a microfluidic channel flow in the inertial regime. While inertial lift forces drive the capsule away from the channel center, its deformability favors migration in the opposite direction...
April 26, 2017: Soft Matter
https://www.readbyqxmd.com/read/28442856/functional-outcome-of-fixation-of-complex-intra-articular-distal-radius-fractures-with-a-variable-angle-distal-radius-volar-rim-plate
#6
M Spiteri, W Ng, J Matthews, D Power
Aim To evaluate the outcome of these complex fractures using a volar approach and the DePuy Synthes variable-angle 2.4-mm distal radius rim plate. This plate is precontoured to the volar rim for placement distal to the watershed line allowing purchase of the rim fragment of the lunate facet. Its low profile and smooth edges are designed to minimize flexor tendon irritation. Method We report on a consecutive series of far distal AO-23B3 and AO-23C3 fractures treated using this plate in a tertiary hand center between November 2011 and May 2014...
April 2017: Journal of Hand and Microsurgery
https://www.readbyqxmd.com/read/28442122/the-effect-of-temperature-on-cyclic-fatigue-of-nickel-titanium-rotary-endodontic-instruments
#7
Amandeep Dosanjh, Susan Paurazas, Mazin Askar
INTRODUCTION: This study examined the effect of different temperatures on the cyclic fatigue of nickel-titanium rotary files. METHODS: Three groups of nickel-titanium rotary files (EF group [EdgeFile; EdgeEndo, Albuquerque, NM], VB group [Vortex Blue; Dentsply Tulsa Dental Specialties, Tulsa, OK], and ESX group [ESX; Brasseler USA, Savannah, GA]) of size 25 with a .04 taper and 25-mm length were tested in a metal block that simulated a canal curvature of 60° and a 5-mm radius curvature...
May 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28441321/a-cost-effective-relative-humidity-sensor-based-on-side-coupling-induction-technology
#8
Yingzi Zhang, Yulong Hou, Wenyi Liu, Huixin Zhang, Yanjun Zhang, Zhidong Zhang, Jing Guo, Jia Liu, Liang Zhang, Qiu-Lin Tan
A intensity-modulated optical fiber relative humidity (RH) sensor based on the side coupling induction technology (SCIT) is presented and experimentally demonstrated. The agarose gel and the twisted macro-bend coupling structure are first combined for RH sensing applications. The refractive index (RI) of the agarose gel increases with the increase of the RH and is in linear proportion from 20 to 80%RH. The side coupling power, which changes directly with the RI of the agarose gel, can strip the source noise from the sensor signal and improve the signal to noise ratio substantially...
April 25, 2017: Sensors
https://www.readbyqxmd.com/read/28441283/early-intake-of-radiocesium-by-residents-living-near-the-tepco-fukushima-dai-ichi-nuclear-power-plant-after-the-accident-part-2-relationship-between-internal-dose-and-evacuation-behavior-in-individuals
#9
Naoaki Kunishima, Osamu Kurihara, Eunjoo Kim, Tetsuo Ishikawa, Takashi Nakano, Kumiko Fukutsu, Kotaro Tani, Kazuo Furuyama, Shozo Hashimoto, Misao Hachiya, Yutaka Naoi, Makoto Akashi
The Tokyo Electric Power Company's Fukushima Dai-ichi Nuclear Power Plant (FDNPP) accident exposed members of the public to radiation. This study analyses the relation between personal behavior data obtained from 112 out of 174 subjects who underwent whole-body measurements by the National Institute of Radiological Sciences (NIRS) during the period from 27 June to 28 July 2011 and their committed effective doses (CEDs) from Cs and Cs. The whereabouts of the 112 persons living in municipalities near the FDNPP (mainly, Namie town) on several days in March 2011 are graphed on maps...
June 2017: Health Physics
https://www.readbyqxmd.com/read/28440820/a-pre-strain-strategy-for-developing-a-highly-stretchable-and-foldable-one-dimensional-conductive-cord-based-on-a-ag-nanowire-network
#10
Areum Kim, Jihoon Ahn, Hyewon Hwang, Eunsong Lee, Jooho Moon
A highly stretchable and foldable conductive cord was developed by depositing silver nanowires (AgNWs) on a polyurethane cord. The application of pre-strain to the cord during the deposition of AgNWs resulted in the formation of a wrinkled AgNW layer, thereby inducing structural stability towards stretching and bending. This conductive cord exhibited stable electric conduction under strain values of up to 167% and at a bending radius of 0.3 mm. Also, it could withstand a stretching test of 500 cycles at a strain of 50%...
April 25, 2017: Nanoscale
https://www.readbyqxmd.com/read/28439979/scattering-contribution-to-the-double-pass-psf-using-monte-carlo-simulations
#11
Dimitrios Christaras, Harilaos Ginis, Alexandros Pennos, Pablo Artal
PURPOSE: Scattering in the eye occurs mainly at two sites: the eye's optical media and the deeper retinal layers. Although the two phenomena are often treated collectively, their spatial domain of contribution to the double-pass Point Spread Function (PSF) is different: the fundus effect is limited to the narrow and middle part of the PSF whereas scattering in the eye's optics extends also to wide angles. The objective of this work was to determine the domain of contribution at the double-pass PSF of light scattered in the ocular media and the ocular fundus, using simulated and experimental data for two different wavelengths and for two different pigmentations...
May 2017: Ophthalmic & Physiological Optics: the Journal of the British College of Ophthalmic Opticians (Optometrists)
https://www.readbyqxmd.com/read/28439818/can-experienced-surgeons-predict-the-additional-value-of-a-ct-scan-in-patients-with-displaced-intra-articular-distal-radius-fractures
#12
Y V Kleinlugtenbelt, K Madden, S R Groen, S J Ham, P Kloen, R Haverlag, M P Simons, M Bhandari, J C Goslings, V A B Scholtes, R W Poolman
There are no clear guidelines when an additional CT scan should be obtained for the treatment of displaced intra-articular distal radius fractures (DRF). This study aimed to investigate whether surgeons can predict the usefulness of CT scans to facilitate choice of treatment plan and/or pre-operative planning for DRF. Four surgeons evaluated 51 patients with displaced DRF. The choice of treatment (operative or nonoperative) was based on conventional radiographs. Subsequently, the surgeons were asked whether they would have requested an additional CT scan to determine this treatment choice, and also whether they required a CT scan for pre-operative planning...
April 24, 2017: Strategies in Trauma and Limb Reconstruction
https://www.readbyqxmd.com/read/28439561/first-detection-of-equatorial-dark-dust-lane-in-a-protostellar-disk-at-submillimeter-wavelength
#13
Chin-Fei Lee, Zhi-Yun Li, Paul T P Ho, Naomi Hirano, Qizhou Zhang, Hsien Shang
In the earliest (so-called "Class 0") phase of Sun-like (low-mass) star formation, circumstellar disks are expected to form, feeding the protostars. However, these disks are difficult to resolve spatially because of their small sizes. Moreover, there are theoretical difficulties in producing these disks in the earliest phase because of the retarding effects of magnetic fields on the rotating, collapsing material (so-called "magnetic braking"). With the Atacama Large Millimeter/submillimeter Array (ALMA), it becomes possible to uncover these disks and study them in detail...
April 2017: Science Advances
https://www.readbyqxmd.com/read/28437989/low-loss-compact-and-fabrication-tolerant-si-wire-90%C3%A2-waveguide-bend-using-clothoid-and-normal-curves-for-large-scale-photonic-integrated-circuits
#14
Takeshi Fujisawa, Shuntaro Makino, Takanori Sato, Kunimasa Saitoh
Ultimately low-loss 90° waveguide bend composed of clothoid and normal curves is proposed for dense optical interconnect photonic integrated circuits. By using clothoid curves at the input and output of 90° waveguide bend, straight and bent waveguides are smoothly connected without increasing the footprint. We found that there is an optimum ratio of clothoid curves in the bend and the bending loss can be significantly reduced compared with normal bend. 90% reduction of the bending loss for the bending radius of 4 μm is experimentally demonstrated with excellent agreement between theory and experiment...
April 17, 2017: Optics Express
https://www.readbyqxmd.com/read/28437968/vortex-energy-flows-generated-by-core-shell-nanospheres
#15
Shih-Wen Chen, Jia-Han Li
Investigated in this paper is the interaction of light and the nanospheres composed by a dielectric core with a gold-shell cladding that causes the optical vortices inside the core and the whirlpools around the shell. Different radius ratios, dimensions and the dielectric functions of nanospheres were studied using the finite-difference time-domain method. It was found that optical vortices were most likely to occur in the regions of increased absorption cross section and reduced scattering cross section. Two optical vortices of the opposite polarity, each centered in one of the particles of a dimer are created by a nanoshell dimer...
April 17, 2017: Optics Express
https://www.readbyqxmd.com/read/28437916/multiband-selective-absorbers-made-of-1d-periodic-ag-sio-sub-2-sub-ag-core-shell-coaxial-cylinders-horizontally-lying-on-a-planar-substrate
#16
Yi Zhao, Ceji Fu
In this paper, we present a one-dimensional periodic microstructure for multiband selective absorbers of thermal radiation. The microstructure is made of Ag/SiO<sub>2</sub>/Ag core/shell coaxial cylinders horizontally lying on top of a SiO<sub>2</sub> dielectric spacer and an opaque silver substrate. The spectral-directional absorptivity of the proposed structure was numerically investigated with the finite element based Comsol Multiphysics software. Multiband selective absorption in the wavenumber range from 2500 to 20000 cm<sup>-1</sup> for TM-wave incidence was obtained...
April 17, 2017: Optics Express
https://www.readbyqxmd.com/read/28437684/fibrillar-disruption-by-ac-electric-field-induced-oscillation-a-case-study-with-human-serum-albumin
#17
Shubhatam Sen, Monojit Chakraborty, Snigdha Goley, Swagata Dasgupta, Sunando DasGupta
The effect of oscillation induced by a frequency-dependent alternating current (AC) electric field to dissociate preformed amyloid fibrils has been investigated. An electrowetting-on-dielectric type setup has been used to apply the AC field of varying frequencies on preformed fibrils of human serum albumin (HSA). The disintegration potency has been monitored by a combination of spectroscopic and microscopic techniques. The experimental results suggest that the frequency of the applied AC field plays a crucial role in the disruption of preformed HSA fibrils...
April 13, 2017: Biophysical Chemistry
https://www.readbyqxmd.com/read/28437479/conformational-dynamics-of-bacterial-trigger-factor-in-apo-and-ribosome-bound-states
#18
Mehmet Tarik Can, Zeynep Kurkcuoglu, Gokce Ezeroglu, Arzu Uyar, Ozge Kurkcuoglu, Pemra Doruker
The chaperone trigger factor (TF) binds to the ribosome exit tunnel and helps cotranslational folding of nascent chains (NC) in bacterial cells and chloroplasts. In this study, we aim to investigate the functional dynamics of fully-atomistic apo TF and its complex with 50S. As TF accomodates a high percentage of charged residues on its surface, the effect of ionic strength on TF dynamics is assessed here by performing five independent molecular dynamics (MD) simulations (total of 1.3 micro-second duration) at 29 mM and 150 mM ionic strengths...
2017: PloS One
https://www.readbyqxmd.com/read/28437114/nanoparticle-size-control-in-microemulsion-synthesis
#19
Benoit Richard, Jean-Luc Lemyre, Anna M Ritcey
Quasi-monodisperse populations of (H3O)Y3F10∙xH2O nanocrystals of varying size are prepared in Igepal-stabilized microemulsions. Correlations between microemulsion composition, micelle hydrodynamic radius and final nanoparticle size are established and shed light on the mechanism of particle size control. Under the conditions considered here, size control appears to be primarily governed by the number of micelles and the quantities of precursor ions. More specifically, the number of NPs formed can be successfully correlated with the number of micelles present and final NP size is, in turn, determined by the number of nuclei and the total amount of material available for nanocrystal formation...
April 24, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28436375/evaluation-of-treatment-of-low-energy-distal-radial-fractures-in-postmenopausal-women
#20
Mariusz Tomaszuk, Jan Kiryluk, Andrzej Tomaszuk, Janusz Popko
BACKGROUND: Distal radial fractures are one of the most common injuries seen in traumatology. Most are treated conservatively with closed reduction and immobilisation in a plaster cast. However, this method does not always allow for achieving and maintaining normal fracture reduction in unstable fractures. The aim of this study was assess clinical and radiographic outcomes of treatment of distal radial fractures depending on the method used. MATERIAL AND METHODS: A total of 77 postmenopausal female subjects were divided into three subgroups, depending on the treatment methods: 1...
January 26, 2017: Ortopedia, Traumatologia, Rehabilitacja
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