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https://www.readbyqxmd.com/read/29349523/prognostic-factors-of-pediatric-glaucoma-a-retrospective-study
#1
Marilita M Moschos, Eirini Nitoda, Isabelle Fenzel, Xuefei Song, Achim Langenbucher, Barbara Kaesmann, Berthold Seitz, Zisis Gatzioufas
PURPOSE: To correlate the features of certain types of infantile glaucoma with the progression and the prognosis of the disease, highlighting probable risk factors. METHODS: Seventy-six patients with pediatric glaucoma were recruited in this retrospective study. All patients underwent ophthalmological examination in the Department of Ophthalmology of the Saarland University Medical Center from January 2001 to December 2012. Our pediatric patients were classified into four different categories of glaucoma: (1) primary congenital glaucoma (presenting buphthalmus), (2) aniridia-related glaucoma, (3) Peters/Rieger's anomaly-related glaucoma and (4) congenital cataract-related glaucoma...
January 18, 2018: International Ophthalmology
https://www.readbyqxmd.com/read/29347326/equation-of-state-of-polydisperse-hard-disk-mixtures-in-the-high-density-regime
#2
Andrés Santos, Santos B Yuste, Mariano López de Haro, Vitaliy Ogarko
A proposal to link the equation of state of a monocomponent hard-disk fluid to the equation of state of a polydisperse hard-disk mixture is presented. Event-driven molecular dynamics simulations are performed to obtain data for the compressibility factor of the monocomponent fluid and of 26 polydisperse mixtures with different size distributions. Those data are used to assess the proposal and to infer the values of the compressibility factor of the monocomponent hard-disk fluid in the metastable region from those of mixtures in the high-density region...
December 2017: Physical Review. E
https://www.readbyqxmd.com/read/29346988/liquid-part-of-the-phase-diagram-and-percolation-line-for-two-dimensional-mercedes-benz-water
#3
T Urbic
Monte Carlo simulations and Wertheim's thermodynamic perturbation theory (TPT) are used to predict the phase diagram and percolation curve for the simple two-dimensional Mercedes-Benz (MB) model of water. The MB model of water is quite popular for explaining water properties, but the phase diagram has not been reported till now. In the MB model, water molecules are modeled as two-dimensional Lennard-Jones disks, with three orientation-dependent hydrogen-bonding arms, arranged as in the MB logo. The liquid part of the phase space is explored using grand canonical Monte Carlo simulations and two versions of Wertheim's TPT for associative fluids, which have been used before to predict the properties of the simple MB model...
September 2017: Physical Review. E
https://www.readbyqxmd.com/read/29346971/drag-force-in-a-cold-or-hot-granular-medium
#4
A Seguin, P Gondret
We measure experimentally and analyze the resisting force exerted by a bidimensional packing of small disks on a larger intruder disk dragged horizontally at constant velocity V_{0}. Depending on the vibration level of the packing that leads to a granular "cold" or "hot" packing, two force regimes are observed. At low vibration level ("cold" granular medium), the drag force F does not depend on V_{0}, whereas for high vibrations ("hot" granular medium), the drag force increases linearly with V_{0}. Both regimes can be understood by the balance of two "granular temperatures" that can be defined in the system: a bulk temperature T_{b} imposed by the external vibration to the overall packing and a local temperature T_{0} induced by the own motion of the intruder disk in its vicinity...
September 2017: Physical Review. E
https://www.readbyqxmd.com/read/29336116/the-retina-of-the-collared-peccary-pecari-tajacu-structure-and-function
#5
Raaya Ezra-Elia, Maya Ross, Nili Avni-Magen, Asaf Berkowitz, Ron Ofri
OBJECTIVE: To study retinal morphology and function in the collared peccary, an ungulate species distantly related to the domestic pig. ANIMAL STUDIES: Twenty captive peccaries anesthetized for routine health examinations. Procedures No abnormalities were noted on a complete ophthalmic examination. Fundi were examined ophthalmoscopically and photographed. The eyes of an individual that died of unrelated, nonocular reasons were studied histologically and by immunohistochemistry...
January 16, 2018: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/29335677/two-dimensional-imaging-and-modification-of-nanophotonic-resonator-modes-using-a-focused-ion-beam
#6
William R McGehee, Thomas Michels, Vladimir Aksyuk, Jabez J McClelland
High-resolution imaging of optical resonator modes is a key step in the development and characterization of nanophotonic devices. Many sub-wavelength mode-imaging techniques have been developed using optical and electron beam excitation-each with its own limitations in spectral and spatial resolution. Here, we report a 2D imaging technique using a pulsed, low-energy focused ion beam of Li+ to probe the near-surface fields inside photonic resonators. The ion beam locally modifies the resonator structure, causing temporally varying spectroscopic shifts of the resonator...
November 2017: Optica
https://www.readbyqxmd.com/read/29330431/gyrotropic-zener-tunneling-and-nonlinear-iv-curves-in-the-zero-energy-landau-level-of-graphene-in-a-strong-magnetic-field
#7
Antti Laitinen, Manohar Kumar, Pertti Hakonen, Edouard Sonin
We have investigated tunneling current through a suspended graphene Corbino disk in high magnetic fields at the Dirac point, i.e. at filling factor ν = 0. At the onset of the dielectric breakdown the current through the disk grows exponentially before ohmic behaviour, but in a manner distinct from thermal activation. We find that Zener tunneling between Landau sublevels dominates, facilitated by tilting of the source-drain bias potential. According to our analytic modelling, the Zener tunneling is strongly affected by the gyrotropic force (Lorentz force) due to the high magnetic field...
January 12, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29325861/crystallographic-and-morphological-analysis-of-sandblasted-highly-translucent-dental-zirconia
#8
Masanao Inokoshi, Haruki Shimizu, Kosuke Nozaki, Tomohiro Takagaki, Kumiko Yoshihara, Noriyuki Nagaoka, Fei Zhang, Jozef Vleugels, Bart Van Meerbeek, Shunsuke Minakuchi
OBJECTIVE: To assess the influence of alumina sandblasting on four highly translucent dental zirconia grades. METHODS: Fully sintered zirconia disk-shaped specimens (15-mm diameter; 0.5-mm thickness) of four highly translucent yttria partially stabilized zirconia (Y-PSZ) grades (KATANA HT, KATANA STML, KATANA UTML, Kuraray Noritake; Zpex Smile, Tosoh) were sandblasted with 50-μm alumina (Al2O3) sand (Kulzer) or left 'as-sintered' (control) (n=5). For each zirconia grade, the translucency was measured using a colorimeter...
January 8, 2018: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/29323299/rotation-in-c-ii-emitting-gas-in-two-galaxies-at-a-redshift-of-6-8
#9
Renske Smit, Rychard J Bouwens, Stefano Carniani, Pascal A Oesch, Ivo Labbé, Garth D Illingworth, Paul van der Werf, Larry D Bradley, Valentino Gonzalez, Jacqueline A Hodge, Benne W Holwerda, Roberto Maiolino, Wei Zheng
The earliest galaxies are thought to have emerged during the first billion years of cosmic history, initiating the ionization of the neutral hydrogen that pervaded the Universe at this time. Studying this 'epoch of reionization' involves looking for the spectral signatures of ancient galaxies that are, owing to the expansion of the Universe, now very distant from Earth and therefore exhibit large redshifts. However, finding these spectral fingerprints is challenging. One spectral characteristic of ancient and distant galaxies is strong hydrogen-emission lines (known as Lyman-α lines), but the neutral intergalactic medium that was present early in the epoch of reionization scatters such Lyman-α photons...
January 10, 2018: Nature
https://www.readbyqxmd.com/read/29318457/decreased-intracellular-granule-movement-and-glucagon-secretion-in-pancreatic-%C3%AE-cells-attached-to-superior-cervical-ganglion-neurites
#10
Kiyoto Watabe, Satoru Yokawa, Yoshikazu Inoh, Takahiro Suzuki, Tadahide Furuno
Autonomic neurons innervate pancreatic islets of Langerhans and participate in the maintenance of blood glucose concentrations by controlling hormone levels through attachment with islet cells. We previously found that stimulated superior cervical ganglia (SCG) could induce Ca2+ oscillation in α cells via neuropeptide substance P using an in vitro co-culture model. In this study, we studied the effect of SCG neurite adhesion on intracellular secretory granule movement and glucagon secretion in α cells stimulated by low glucose concentration...
January 9, 2018: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/29316687/contact-behavior-of-composite-crtisin-coated-dies-in-compressing-of-mg-alloy-sheets-under-high-pressure
#11
T S Yang, S H Yao, Y Y Chang, J H Deng
Hard coatings have been adopted in cutting and forming applications for nearly two decades. The major purpose of using hard coatings is to reduce the friction coefficient between contact surfaces, to increase strength, toughness and anti-wear performance of working tools and molds, and then to obtain a smooth work surface and an increase in service life of tools and molds. In this report, we deposited a composite CrTiSiN hard coating, and a traditional single-layered TiAlN coating as a reference. Then, the coatings were comparatively studied by a series of tests...
January 8, 2018: Materials
https://www.readbyqxmd.com/read/29316231/osteogenic-cellular-activity-around-onlaid-octacalcium-phosphate-gelatin-composite-onto-rat-calvaria
#12
Ryosuke Iwama, Takahisa Anada, Yukari Shiwaku, Kaori Tsuchiya, Tetsu Takahashi, Osamu Suzuki
The activity and the distribution of osteogenic cells around octacalcium phosphate (OCP) granules combined with gelatin matrix (OCP/Gel) onlaid on rat calvaria were analyzed histomorphometrically and immunohistochemically during vertical bone augmentation under mechanical or non-mechanical environment until 8 weeks. OCP/Gel disk was placed in subperiosteal pocket on the calvaria with or without polytetrafluoroethylene (PTFE) support. The latter is a non-mechanical stress model to alleviate the mechanical stress from the subcutaneous tissues...
January 9, 2018: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/29315667/collision-free-poisson-motion-planning-in-ultra-high-dimensional-molecular-conformation-spaces
#13
Rasmus Fonseca, Dominik Budday, Henry van den Bedem
The function of protein, RNA, and DNA is modulated by fast, dynamic exchanges between three-dimensional conformations. Conformational sampling of biomolecules with exact and nullspace inverse kinematics, using rotatable bonds as revolute joints and noncovalent interactions as holonomic constraints, can accurately characterize these native ensembles. However, sampling biomolecules remains challenging owing to their ultra-high dimensional configuration spaces, and the requirement to avoid (self-) collisions, which results in low acceptance rates...
January 5, 2018: Journal of Computational Chemistry
https://www.readbyqxmd.com/read/29306004/genetic-diversity-and-clonal-characteristics-of-ciprofloxacin-resistant-campylobacter-jejuni-isolated-from-chilean-patients-with-gastroenteritis
#14
Luis Collado, Nataly Muñoz, Lorena Porte, Sofía Ochoa, Carmen Varela, Ivo Muñoz
Campylobacter jejuni is a major cause of acute gastroenteritis worldwide. However, it has also been associated with other diseases such as bacteremia and with several post-infection sequelae. Although campylobacteriosis is usually a self-limited infection, antibiotics are indicated for severe and chronic conditions. Unfortunately, several industrialised nations have reported a substantial increase in antibiotic resistance of C. jejuni. However, there is still a lack of knowledge about the epidemiology of resistance developed by this pathogen in the developing world...
January 3, 2018: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/29304379/optical-properties-and-composition-changes-in-chromophoric-dissolved-organic-matter-along-trophic-gradients-implications-for-monitoring-and-assessing-lake-eutrophication
#15
Yunlin Zhang, Yongqiang Zhou, Kun Shi, Boqiang Qin, Xiaolong Yao, Yibo Zhang
Chromophoric dissolved organic matter (CDOM) is an important optically active substance in aquatic environments and plays a key role in light attenuation and in the carbon, nitrogen and phosphorus biogeochemical cycles. Although the optical properties, abundance, sources, cycles, compositions and remote sensing estimations of CDOM have been widely reported in different aquatic environments, little is known about the optical properties and composition changes in CDOM along trophic gradients. Therefore, we collected 821 samples from 22 lakes along a trophic gradient (oligotrophic to eutrophic) in China from 2004 to 2015 and determined the CDOM spectral absorption and nutrient concentrations...
December 26, 2017: Water Research
https://www.readbyqxmd.com/read/29299207/first-report-of-oxa-143-lactamase-producing-acinetobacter-baumannii-in-qom-iran
#16
Zohreh Sarikhani, Razieh Nazari, Mahmoud Nateghi Rostami
Objectives: Antibiotic resistance in Acinetobacter baumannii and outbreaks caused by this organism have been reported from several areas of the world. The present study aimed at determining the antibiotic susceptibility profiles and the distribution of OXA-type beta-lactamases among Iranian Acinetobacter baumannii isolates from Qom of Iran. Materials and Methods: For this study, 108 non-duplicate A. baumannii isolates were obtained from clinical specimens in four teaching hospitals in Qom in the central of Iran...
November 2017: Iranian Journal of Basic Medical Sciences
https://www.readbyqxmd.com/read/29296273/new-delhi-metallo-%C3%AE-lactamase-1-producing-klebsiella-pneumoniae-isolates-in-hospitalized-patients-in-kashan-iran
#17
Farzaneh Firoozeh, Zeinab Mahluji, Ehsaneh Shams, Ahmad Khorshidi, Mohammad Zibaei
Background and Objectives: New Delhi metallo-ß-lactamase (NDM) is a newly emerging metallo-ß-lactamases, which can destroy all β-lactams including carbapenems. Therefore, this study aimed at evaluating New Delhi metallo-ß-lactamase-1-production in clinical isolates of Klebsiella pneumoniae in Kashan, Iran. Materials and Methods: In a cross-sectional study, 181 K. pneumoniae isolates were collected from clinical samples of patients, who referred to Shahid Beheshi hospital in Kashan during November 2013 and October 2014...
October 2017: Iranian Journal of Microbiology
https://www.readbyqxmd.com/read/29281959/a-comparison-of-genotyping-by-sequencing-analysis-methods-on-low-coverage-crop-datasets-shows-advantages-of-a-new-workflow-gb-easy
#18
Daniel P Wickland, Gopal Battu, Karen A Hudson, Brian W Diers, Matthew E Hudson
BACKGROUND: Genotyping-by-sequencing (GBS), a method to identify genetic variants and quickly genotype samples, reduces genome complexity by using restriction enzymes to divide the genome into fragments whose ends are sequenced on short-read sequencing platforms. While cost-effective, this method produces extensive missing data and requires complex bioinformatics analysis. GBS is most commonly used on crop plant genomes, and because crop plants have highly variable ploidy and repeat content, the performance of GBS analysis software can vary by target organism...
December 28, 2017: BMC Bioinformatics
https://www.readbyqxmd.com/read/29261121/six-year-retrospective-review-of-hospital-data-on-antimicrobial-resistance-profile-of-staphylococcus-aureus-isolated-from-skin-infections-from-a-single-institution-in-greece
#19
Christina Stefanaki, Alexandra Ieronymaki, Theoni Matoula, Chrysseis Caroni, Evaggelia Polythodoraki, Stella-Eugenia Chryssou, George Kontochristopoulos, Christina Antoniou
Objective: To determine the prevalence of resistant strains of Staphylococcus aureus (S. aureus) isolated from Skin and soft tissue infections (SSTI) to various antibiotics. Material and Methods: All culture-positive results for S. aureus from swabs taken from patients presenting at one Greek hospital with a skin infection between the years 2010-2015 were examined retrospectively. Bacterial cultures, identification of S. aureus and antimicrobial susceptibility testing were performed using the disk diffusion method according to Clinical and Laboratory Standards Institute (CLSI) guidelines and European Committee on Antimicrobial testing (EUCAST) breakpoints...
December 20, 2017: Antibiotics
https://www.readbyqxmd.com/read/29250446/a-laboratory-assessment-of-two-local-strains-of-the-beauveria-bassiana-bals-vuill-against-the-tetranychus-urticae-acari-tetranychidae-and-their-potential-as-a-mycopesticide
#20
Serkan Ortucu, Omer Faruk Algur
This study was conducted to assess highly pathogenic Beauveria bassiana isolates to be used in biocontrol and to determine their potentials as mycopesticide. For this purpose, two B. bassiana isolates, which were locally isolated from T. urticae, were chosen. Firstly, three suspensions were investigated at the degree of humidity of 65 ± 5% and 100% RH. Secondly, these strains were selected according to their tendency to mass production, tolerance to UV radiation, and capability of producing spore at the different temperatures...
2017: Journal of Pathogens
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