keyword
MENU ▼
Read by QxMD icon Read
search

ARC

keyword
https://www.readbyqxmd.com/read/28432879/seasonal-variation-and-health-risk-assessment-of-organochlorine-compounds-in-urban-soils-of-novi-sad-serbia
#1
Biljana D Škrbić, Vesna Marinković, Igor Antić, Anita Petrović Gegić
The aim of this paper was to determine spatial and seasonal variation of 6 indicator polychlorinated biphenyls (PCBs) and 18 organochlorine pesticides (OCPs) in urban soils of Novi Sad, Serbia. Sixty surface soil samples were collected during both winter and summer season, from different types of locations: schools, recreational areas, residential and industrial zones. Samples were treated using the method of accelerated solvent extraction, which allows simultaneous extraction and clean up of PCBs and OCPs...
April 15, 2017: Chemosphere
https://www.readbyqxmd.com/read/28432459/using-an-anatomically-preshaped-low-profile-locking-plate-system-leads-to-reliable-results-in-comminuted-radial-head-fractures
#2
Moritz Crönlein, Michael Zyskowski, Marc Beirer, Florian B Imhoff, Dominik Pförringer, Gunther H Sandmann, Chlodwig Kirchhoff, Peter Biberthaler, Sebastian Siebenlist
INTRODUCTION: For comminuted and displaced fractures of the radial head open reduction and internal fixation (ORIF) is recommended nowadays as the treatment of choice. Due to the development of locking plates the possibilities of ORIF in complex fracture types were extended. The purpose of this retrospective survey therefore was to review the preliminary subjective and objective results in patients treated by anatomically preshaped locked plating. A reliable fracture healing for these recently introduced plating devices was hypothesized...
April 21, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/28431184/congener-specific-disposition-of-chiral-polychlorinated-biphenyls-in-lactating-mice-and-their-offspring-implications-for-pcb-developmental-neurotoxicity
#3
Izabela Kania-Korwel, Tracy Lukasiewicz, Christopher D Barnhart, Marianna Stamou, Haeun Chung, Kevin M Kelly, Stelvio Bandiera, Pamela J Lein, Hans-Joachim Lehmler
Chiral polychlorinated biphenyl (PCB) congeners have been implicated by laboratory and epidemiological studies in PCB developmental neurotoxicity. These congeners are metabolized by cytochrome P450 (P450) enzymes to potentially neurotoxic hydroxylated metabolites (OH-PCBs). The present study explores the enantioselective disposition and toxicity of two environmentally relevant, neurotoxic PCB congeners and their OH-PCB metabolites in lactating mice and their offspring following dietary exposure of the dam. Female C57BL/6N mice (8 weeks old) were fed daily, beginning two weeks prior to conception and continuing throughout gestation and lactation, with 3...
April 14, 2017: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/28428419/iptf16geu-a-multiply-imaged-gravitationally-lensed-type-ia-supernova
#4
A Goobar, R Amanullah, S R Kulkarni, P E Nugent, J Johansson, C Steidel, D Law, E Mörtsell, R Quimby, N Blagorodnova, A Brandeker, Y Cao, A Cooray, R Ferretti, C Fremling, L Hangard, M Kasliwal, T Kupfer, R Lunnan, F Masci, A A Miller, H Nayyeri, J D Neill, E O Ofek, S Papadogiannakis, T Petrushevska, V Ravi, J Sollerman, M Sullivan, F Taddia, R Walters, D Wilson, L Yan, O Yaron
We report the discovery of a multiply imaged, gravitationally lensed type Ia supernova, iPTF16geu (SN 2016geu), at redshift z = 0.409. This phenomenon was identified because the light from the stellar explosion was magnified more than 50 times by the curvature of space around matter in an intervening galaxy. We used high-spatial-resolution observations to resolve four images of the lensed supernova, approximately 0.3 arc seconds from the center of the foreground galaxy. The observations probe a physical scale of ~1 kiloparsec, smaller than is typical in other studies of extragalactic gravitational lensing...
April 21, 2017: Science
https://www.readbyqxmd.com/read/28425969/the-pharmacological-effects-of-lutein-and-zeaxanthin-on-visual-disorders-and-cognition-diseases
#5
REVIEW
Yu-Ping Jia, Lei Sun, He-Shui Yu, Li-Peng Liang, Wei Li, Hui Ding, Xin-Bo Song, Li-Juan Zhang
Lutein (L) and zeaxanthin (Z) are dietary carotenoids derived from dark green leafy vegetables, orange and yellow fruits that form the macular pigment of the human eyes. It was hypothesized that they protect against visual disorders and cognition diseases, such as age-related macular degeneration (AMD), age-related cataract (ARC), cognition diseases, ischemic/hypoxia induced retinopathy, light damage of the retina, retinitis pigmentosa, retinal detachment, uveitis and diabetic retinopathy. The mechanism by which they are involved in the prevention of eye diseases may be due their physical blue light filtration properties and local antioxidant activity...
April 20, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28423624/assessment-of-female-breast-dose-for-thoracic-cone-beam-ct-using-mosfet-dosimeters
#6
Wenzhao Sun, Bin Wang, Bo Qiu, Jian Liang, Weihao Xie, Xiaowu Deng, Zhenyu Qi
OBJECTIVE: To assess the breast dose during a routine thoracic cone-beam CT (CBCT) check with the efforts to explore the possible dose reduction strategy. MATERIALS AND METHODS: Metal oxide semiconductor field-effect transistor (MOSFET) dosimeters were used to measure breast surface doses during a thorax kV CBCT scan in an anthropomorphic phantom. Breast doses for different scanning protocols and breast sizes were compared. Dose reduction was attempted by using partial arc CBCT scan with bowtie filter...
March 21, 2017: Oncotarget
https://www.readbyqxmd.com/read/28423530/patterns-of-failure-and-clinical-outcomes-of-definitive-radiotherapy-for-cervical-esophageal-cancer
#7
Lina Zhao, Yongchun Zhou, Yunfeng Mu, Guangjin Chai, Feng Xiao, Lina Tan, Steven H Lin, Mei Shi
PURPOSE: Because of the scarcity of cervical esophageal cancer (CEC), data for this disease entity is limited. We aim to evaluate the outcomes, prognostic factors and failure patterns of CEC treated by contemporary radiotherapy (RT). METHODS: We retrospectively analyzed 86 CEC patients consecutively treated between 2007 and 2015 by definitive RT with or without concurrent chemotherapy. RT was mainly delivered with Intensity Modulated Irradiation Therapy (IMRT) or Volumetric-Modulated Arc Therapy (VMAT)...
March 28, 2017: Oncotarget
https://www.readbyqxmd.com/read/28423145/brief-behavioral-therapy-for-pediatric-anxiety-and-depression-in-primary-care-a-randomized-clinical-trial
#8
V Robin Weersing, David A Brent, Michelle S Rozenman, Araceli Gonzalez, Megan Jeffreys, John F Dickerson, Frances L Lynch, Giovanna Porta, Satish Iyengar
Importance: Anxiety and depression affect 30% of youth but are markedly undertreated compared with other mental disorders, especially in Hispanic populations. Objective: To examine whether a pediatrics-based behavioral intervention targeting anxiety and depression improves clinical outcome compared with referral to outpatient community mental health care. Design, Setting, and Participants: This 2-center randomized clinical trial with masked outcome assessment conducted between brief behavioral therapy (BBT) and assisted referral to care (ARC) studied 185 youths (aged 8...
April 19, 2017: JAMA Psychiatry
https://www.readbyqxmd.com/read/28422681/fast-median-filtering-for-phase-or-orientation-data
#9
Martin Storath, Andreas Weinmann
Median filtering is among the most utilized tools for smoothing real-valued data, as it is robust, edge-preserving, valuepreserving, and yet can be computed efficiently. For data living on the unit circle, such as phase data or orientation data, a filter with similar properties is desirable. For these data, there is no unique means to define a median; so we discuss various possibilities. The arc distance median turns out to be the only variant which leads to robust, edge-preserving and value-preserving smoothing...
April 12, 2017: IEEE Transactions on Pattern Analysis and Machine Intelligence
https://www.readbyqxmd.com/read/28420186/using-moss-to-assess-airborne-heavy-metal-pollution-in-taizhou-china
#10
Xiaoli Zhou, Qin Chen, Chang Liu, Yanming Fang
Bryophytes act as bioindicators and bioaccumulators of metal deposition in the environment. To understand the atmospheric deposition of heavy metals (cadmium (Cd), chromium (Cr), copper (Cu), mercury (Hg), nickel (Ni), lead (Pb), and zinc (Zn)) in Taizhou, East China, samples of moss (Haplocladium microphyllum) were collected from 60 sites selected by a systematic sampling method during the summer of 2012, and the concentrations of these heavy metals were determined by inductively coupled plasma atomic emission spectroscopy (ICP-AES)...
April 17, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28419877/effect-of-foot-orthoses-on-the-medial-longitudinal-arch-in-children-with-flexible-flatfoot-deformity-a-three-dimensional-moment-analysis
#11
Amir Ali Jafarnezhadgero, Morteza Madadi Shad, Mahdi Majlesi
Foot orthoses are often used to correct altered gait patterns. The purpose of this study was to investigate how foot orthoses can modify the magnitude of three dimensional moments of ankle, knee, and hip joints during a stride of gait in children with flexible flat feet. Bilateral gait data were collected from fourteen male children (age 10.2±1.4 years) suffering from flat feet syndrome. In order to obtain the kinematics data, a Vicon system with six cameras (100Hz) was used and two Kistler force plates (1000Hz) to record the kinetics data under each leg...
April 7, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28416422/-penetrating-air-gun-pellet-into-the-orbital-apex
#12
Rodolfo Belmonte-Caro, Alberto Garcia-Perla-Garcia, Jose Romero-Arce, Pedro Infante-Cossio
A foreign body penetrating into the intraconal orbital compartment poses a surgical challenge because of its deep location behind the globe and near the optic nerve. We present a case of an air gun pellet lodged into the orbital apex, which was removed via superolateral orbitotomy through coronal incision. This additional craniofacial technique is a safe procedure to access the lateral aspect of the intraconal compartment in the unusual event of having to remove an orbital foreign body.
April 14, 2017: Neurocirugía
https://www.readbyqxmd.com/read/28416395/the-early-history-of-manganese-and-the-recognition-of-its-neurotoxicity-1837-1936
#13
Paul D Blanc
The history of the biomedical recognition manganese-caused neurotoxicity mirrors changing technologies as much as it does the ontology of parkinsonism. The initial 1837 report of manganese-induced neurologic injury was made by John Couper, a university-based physician in Scotland. He made clear that the outbreak occurred among workers at the Charles Tennant bleach manufactory in the environs of Glasgow. The relatively new technology of chlorine generation using manganese accounted for the novel exposure involved...
April 14, 2017: Neurotoxicology
https://www.readbyqxmd.com/read/28415518/antimicrobial-property-cytocompatibility-and-corrosion-resistance-of-zn-doped-zro2-tio2-coatings-on-ti6al4v-implants
#14
Ruoyun Wang, Xiaojing He, Yuee Gao, Xiangyu Zhang, Xiaohong Yao, Bin Tang
Zn-doped ZrO2/TiO2 porous coatings (Zn-ZrO2/TiO2) were prepared on the surface of titanium alloy (Ti6Al4V) by a hybrid approach of magnetron sputtering and micro-arc oxidation (MAO). The microstructures, phase constituents and elemental states of the coating were investigated by scanning electron microscope (SEM) equipped with energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The results demonstrate that the Zn-ZrO2/TiO2 coatings are porous and its thickness is approximately 13μm...
June 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28415456/osteoinductive-composite-coatings-for-flexible-intramedullary-nails
#15
E N Bolbasov, A V Popkov, D A Popkov, E N Gorbach, I A Khlusov, A S Golovkin, A Sinev, V M Bouznik, S I Tverdokhlebov, Y G Anissimov
This work presents composite coatings based on a copolymer of vinylidene fluoride with tetrafluoroethylene (VDF-TeFE) and hydroxyapatite (HA) for flexible intramedullary nails (FIN). The effect of the proportion of VDF-TeFE (100-25% wt.) on physicochemical and biological properties of the composite coatings was investigated. It was shown that a decrease of VDF-TeFE in the coating hinders its crystallization in β and γ forms which have piezoelectric properties. The decrease also reduces an adhesive strength to 9...
June 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28415419/lsp-mao-composite-bio-coating-on-az80-magnesium-alloy-for-biomedical-application
#16
Ying Xiong, Qiang Hu, Renguo Song, Xiaxia Hu
A composite bio-coating was fabricated on AZ80 magnesium (Mg) alloy by using micro-arc oxidation (MAO) under the pretreatment of laser shock peening (LSP) in order to improve the bio-corrosion resistance and the mechanical integrity. LSP treatment could induce grain refinement and compressive residual stress field on the surface of material. MAO bio-coating was grown in alkaline electrolyte with hydroxyapatite (HA, Ca10(PO4)6(OH)2) to improve the biological properties of the material. The microstructure, element and phase composition for untreated based material (BM) and treated samples (LSP layer, MAO bio-coating and LSP/MAO composite bio-coating) were investigated by transmission electron microscopy (TEM), scanning electron microscope (SEM), energy dispersion spectroscopy (EDS) and X-ray diffraction (XRD)...
June 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28414357/infrared-brewster-angle-polarizing-beam-splitter-using-a-high-index-prism-with-a-small-wedge-angle
#17
R M A Azzam
Specular reflection at the Brewster angle by a planar surface of a high-refractive-index transparent substrate is an effective means of generating linearly polarized light in the infrared. However, in such a reflection linear polarizer, the refracted light beam is usually dumped. In this paper we describe a polarizing beam splitter (PBS) that uses a high-index prism with a small wedge angle to generate two orthogonally p and s linearly polarized beams that travel in orthogonal directions. A single-layer antireflection coating (ARC) at the exit face of the prism can be embedded with aligned Ag nano needles to suppress the transmission of the small, residual, s-polarized refracted component...
April 10, 2017: Applied Optics
https://www.readbyqxmd.com/read/28414265/effectiveness-of-a-home-based-eccentric-exercise-program-on-the-torque-angle-relationship-of-the-shoulder-external-rotators-a-pilot-study
#18
Timothy L Uhl, Thomas Rice, Brianna Papotto, Timothy A Butterfield
CONTEXT: The role of the rotator cuff is to provide dynamic stability to the glenohumeral joint. Human and animal studies have identified sarcomerogenesis as an outcome of eccentric training indicated by more torque generation with the muscle in a lengthened position. OBJECTIVE: The authors hypothesized that a home-based eccentric-exercise program could increase the shoulder external rotators' eccentric strength at terminal internal rotation (IR). DESIGN: Prospective case series...
April 2017: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/28414023/effect-of-spatial-and-temporal-stimulus-parameters-on-the-maturation-of-global-motion-perception
#19
Kimberly Meier, Deborah Giaschi
There are discrepancies with respect to the age at which adult-like performance is reached on tasks assessing global motion perception. This is in part because performance in children depends on stimulus parameters. We recently showed that five-year-olds demonstrated adult-like performance over a range of speeds when the speed ratio was comprised of longer spatial and temporal displacements; but displayed immature performance when the speed ratio was comprised of shorter displacements. The goal of the current study was to assess the effect of these global motion stimulus parameters across a broader age range in order to estimate the age at which mature performance is reached...
April 13, 2017: Vision Research
https://www.readbyqxmd.com/read/28413057/sex-differences-in-the-association-of-cutaneous-melanoma-incidence-rates-and-geographic-ultraviolet-light-exposure
#20
Feng Liu-Smith, Ahmed Majid Farhat, Anthony Arce, Argyrios Ziogas, Thomas Taylor, Zi Wang, Vandy Yourk, Jing Liu, Jun Wu, Archana J McEligot, Hoda Anton-Culver, Frank L Meyskens
BACKGROUND: Cutaneous melanoma (CM) incidence rates continue to increase, and the reasons are unknown. Previously, we reported a unique age-specific sex difference in melanoma that suggested additional causes other than solar ultraviolet (UV) radiation. OBJECTIVE: This study attempted to understand whether and how UV radiation differentially impacts the CM incidence in men and women. METHODS: CM data and daily UV index (UVI) from 31 cancer registries were collected for association analysis...
March 2017: Journal of the American Academy of Dermatology
keyword
keyword
31821
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"