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https://www.readbyqxmd.com/read/28444539/association-of-the-oas3-rs1859330-g-a-genetic-polymorphism-with-severity-of-enterovirus-71-infection-in-chinese-han-children
#1
Yuxia Tan, Tingting Yang, Peipei Liu, Liping Chen, Qingwu Tian, Ya Guo, Hongfang He, Yedan Liu, Zongbo Chen
The 2'5'-oligoadenylate synthetase (OAS) is an interferon (IFN)-induced protein that plays an important role in the antiviral action of IFN, with OAS3 being one of the four OAS classes (OAS1, OAS2, OAS3, OASL). The effect of OAS on several infectious viral diseases has been reported; however, a study of the effect of OAS3 on enterovirus 71 (EV71) is lacking. The purpose of this study was to evaluate the association of the OAS3 rs1859330 G/A genetic polymorphism with susceptibility and severity of EV71 infection...
April 25, 2017: Archives of Virology
https://www.readbyqxmd.com/read/28443999/first-reported-enterovirus-d68-infection-in-pediatric-patients-from-the-caribbean-region-evidence-of-spread-from-the-u-s-outbreak
#2
SueMin Nathaniel, Shalauddin Ahmed, Jennifer Wilson, Cristina Gutierrez, Dave D Chadee, Babatunde Olowokure, Pablo M de Salazar
The 2014 enterovirus D68 (EV-D68) outbreak in the United States raised concerns about the introduction of the virus in the Caribbean region. The objective of this study was to provide rapid evidence of the introduction of EV-D68 strains in the Caribbean region during the 2014 outbreak in the United States, using a relatively simple phylogenetic approach. From October 2014 to May 2015, four EV-D68 cases from two countries (Bermuda and Dominica) were detected at the regional referral laboratory at the Caribbean Public Health Agency (Port of Spain, Trinidad and Tobago) based on molecular testing of respiratory specimens...
April 20, 2017: Revista Panamericana de Salud Pública, Pan American Journal of Public Health
https://www.readbyqxmd.com/read/28443933/high-performance-schottky-heterojunction-photodetector-with-directly-grown-graphene-nanowalls-as-electrodes
#3
Jun Shen, Xiangzhi Liu, Xuefen Song, Xinming Li, Jun Wang, Quan Zhou, Shi Luo, Wenlin Feng, Xingzhan Wei, Shirong Lu, Shuanglong Feng, Chunlei Du, Yuefeng Wang, Haofei Shi, Dapeng Wei
Schottky heterojunctions based on graphene-silicon structures are promising for high-performance photodetectors. However, existing fabrication processes adopt transferred graphene as electrodes, limiting process compatibility and generating pollution because of the metal catalyst. In this report, photodetectors are fabricated using directly grown graphene nanowalls (GNWs) as electrodes. Due to the metal-free growth process, GNWs-Si heterojunctions with an ultralow measured current noise of 3.1 fA Hz(-1/2) are obtained, and the as-prepared photodetectors demonstrate specific detectivities of 5...
April 26, 2017: Nanoscale
https://www.readbyqxmd.com/read/28443855/dielectric-functions-and-critical-points-of-crystalline-ws2-ultrathin-films-with-tunable-thickness
#4
Da-Hai Li, Hua Zheng, Zi-Yi Wang, Rong-Jun Zhang, Hao Zhang, Yu-Xiang Zheng, Song-You Wang, David Wei Zhang, Liang-Yao Chen
Centimeter-scale WS2 ultrathin films were synthesized on sapphire substrates, and they showed highly oriented crystallographic growth along the c axis. Afterwards, the as-grown samples were systematically characterized using various detection methods. Reliable values of the roughness layer thickness and the film thickness were extracted using both atomic force microscopy (AFM) and spectroscopic ellipsometry (SE), and identified using Raman spectroscopy as well. The expansion and tensile strain along the [001] direction were discovered using X-ray diffraction (XRD) measurements...
April 26, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28443653/borophane-as-a-bench-mate-of-graphene-a-potential-2d-material-for-anode-of-li-and-na-ion-batteries
#5
Naresh K Jena, Rafael B Araujo, Vivekanand Shukla, Rajeev Ahuja
Borophene, single atomic-layer sheet of boron (Science, 2015, 350, 1513), is a rather new entrant into the burgeoning class of 2D materials. Borophene exhibits anisotropic metallic properties whereas its hydrogenated counterpart borophane is reported to be a gapless Dirac material lying on the same bench with the celebrated graphene. Interestingly, this transition of borophane also rendered stability to it considering the fact that borophene was synthesized under ultra-high vacuum conditions on a metallic (Ag) substrate...
April 26, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28443627/multifunctionality-of-silver-closo-boranes
#6
Mark Paskevicius, Bjarne R S Hansen, Mathias Jørgensen, Bo Richter, Torben R Jensen
Silver compounds share a rich history in technical applications including photography, catalysis, photocatalysis, cloud seeding and as antimicrobial agents. Here we present a class of silver compounds (Ag2B10H10 and Ag2B12H12) that are semiconductors with a bandgap at 2.3 eV in the green visible light spectrum. The silver boranes have extremely high ion conductivity and dynamic-anion facilitated Ag(+) migration is suggested based on the structural model. The ion conductivity is enhanced more than two orders of magnitude at room temperature (up to 3...
April 26, 2017: Nature Communications
https://www.readbyqxmd.com/read/28441863/high-triplet-energy-level-achieved-by-tuning-the-arrangement-of-building-blocks-in-phosphorescent-polymer-backbones-for-furnishing-high-electroluminescent-performances-in-both-blue-and-white-organic-light-emitting-devices
#7
Boao Liu, Feifan Dang, Zhuanzhuan Tian, Zhao Feng, Deyuan Jin, Wanping Dang, Xiaolong Yang, Guijiang Zhou, Zhaoxin Wu
High triplet energy-level (ET) of ca. 2.83 eV has been achieved in novel polymer backbone through tuning the arrangement of two kinds of building blocks showing enhanced hole injection/transporting capacity. Based on this new polymer backbone with high ET, both blue and white phosphorescent polymers have been successfully developed with trade-off between high ET and enhanced charge carrier transporting ability of the polymer backbones. In addition, their photophysical features, electrochemical behaviors and electroluminescent (EL) properties have been characterized in detail...
April 26, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28441025/structures-interconversions-and-spectroscopy-of-iron-carbonyl-clusters-with-an-interstitial-carbide-localized-metal-center-reduction-by-overall-cluster-oxidation
#8
Subramaniam Kuppuswamy, Joshua D Wofford, Chris Joseph, Zhu-Lin Xie, Azim K Ali, Vincent M Lynch, Paul A Lindahl, Michael J Rose
The syntheses, interconversions, and spectroscopic properties of a set of iron carbonyl clusters containing an interstitial carbide are reported. This includes the low temperature X-ray structures of the six-iron clusters (Y)2[Fe6(μ6-C)(μ2-CO)4(CO)12] (1a-c; where Y = NMe4, NEt4, PPh4); the five-iron cluster [Fe5(μ5-C)(CO)15] (3); and the novel formulation of the five-iron cluster (NMe4)2[Fe5(μ5-C)(μ2-CO)(CO)13] (4). Also included in this set is the novel charge-neutral cluster, [Fe6(μ6-C)(CO)18] (2), for which we were unable to obtain a crystallographic structure...
April 25, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28440821/dft-d3-study-of-h2-and-n2-chemisorption-over-cobalt-promoted-ta3n5-100-010-and-001-surfaces
#9
Constantinos D Zeinalipour-Yazdi, Justin S J Hargreaves, Said Laassiri, C Richard A Catlow
The reactants for ammonia synthesis have been studied, employing density functional theory (DFT), with respect to their adsorption on tantalum nitride surfaces. The adsorption of nitrogen was found to be mostly molecular and non-activated with side-on, end-on and tilt configurations. At bridging nitrogen sites (Ta-N-Ta) it results in an azide functional group formation with a formation energy of 205 kJ mol(-1). H2 was found also to chemisorb molecularly with an adsorption energy in the range -81 to -91 kJ mol(-1)...
April 25, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28440056/counteracting-blueshift-optical-absorption-and-maximizing-photon-harvest-in-carbon-nitride-nanosheets-photocatalyst
#10
Mohammad Rahman, Kenneth Davey, Shi-Zhang Qiao
Blueshift of optical absorption and corresponding widening of the bandgap is a fundamental problem with 2D carbon nitride nanosheets (CNNS). An additional problem is low quantum yields (<9%) due to higher loss of absorbed photons. These problems impose a significant restriction to photocatalytic performance of CNNS. Therefore, the synthesis of narrow bandgap CNNS with high quantum efficiency is of pressing research importance. This contribution reports melem-derived narrow bandgap CNNS with a record-low bandgap of 2...
April 25, 2017: Small
https://www.readbyqxmd.com/read/28439661/comparative-study-of-p16-protein-expression-in-squamous-cell-carcinomas-from-patients-with-epidermodysplasia-verruciformis-and-patients-without-the-disease
#11
Mayra S G Mattos, Walmar R Oliveira, Mirian N Sotto
Epidermodysplasia verruciformis (EV) is a rare genodermatosis associated with susceptibility to beta-human papilloma virus (HPV) infection. EV patients develop disseminated warts and non-melanoma skin cancer, mainly squamous cell carcinomas (SCC) that are locally aggressive. EV pathogenesis is not yet fully understood, but alterations in the p16 gene play a role in the pathogenesis of neoplasms caused by high-risk genital HPV. To explore its role in EV lesions, we compared p16 expression in SCC from patients with and without EV...
April 24, 2017: Archives of Dermatological Research
https://www.readbyqxmd.com/read/28438789/desmoglein-2-modulates-extracellular-vesicle-release-from-squamous-cell-carcinoma-keratinocytes
#12
Andrew M Overmiller, Jennifer A Pierluissi, Peter J Wermuth, Sami Sauma, Ubaldo Martinez-Outschoorn, Madalina Tuluc, Adam Luginbuhl, Joseph Curry, Larry A Harshyne, James K Wahl, Andrew P South, Mỹ G Mahoney
Extracellular vesicles (EVs) are nanoscale membrane-derived vesicles that serve as intercellular messengers carrying lipids, proteins, and genetic material. Substantial evidence has shown that cancer-derived EVs, secreted by tumor cells into the blood and other bodily fluids, play a critical role in modulating the tumor microenvironment and affecting the pathogenesis of cancer. Here we demonstrate for the first time that squamous cell carcinoma (SCC) EVs were enriched with the C-terminal fragment of desmoglein 2 (Dsg2), a desmosomal cadherin often overexpressed in malignancies...
April 24, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/28438677/a-prospective-comparative-study-of-severe-neurological-and-uncomplicated-hand-foot-and-mouth-forms-of-paediatric-enterovirus-71-infections
#13
Yoann Crabol, Polidy Pean, Channa Mey, Veasna Duong, Beat Richner, Denis Laurent, Ky Santy, Heng Sothy, Philippe Dussart, Arnaud Tarantola, Philippe Buchy, Paul F Horwood
OBJECTIVES: In this study, we document the clinical characteristics and investigated risk factors for uncomplicated and severe forms of EV-A71 disease in Cambodian children. METHODS: From March to July 2014 inclusive, all patients with suspicion of EV-A71 infection presenting to Kantha Bopha Hospitals in Phnom Penh and Siem Reap and confirmed by the Virology Unit at the Institut Pasteur du Cambodge were prospectively enrolled in this study. Throat swabs, rectal swabs and serum samples were collected from all consecutive patients with suspected EV-A71 infection...
April 21, 2017: International Journal of Infectious Diseases: IJID
https://www.readbyqxmd.com/read/28437617/electrostatic-origin-of-red-solvatochromic-shift-of-dfhbdi-in-rna-spinach
#14
Samik Bose, Suman Chakrabarty, Debashree Ghosh
Interactions with environment tune the spectral properties of biological chromophores, e.g. fluorescent proteins. Understanding of the relative contribution of the various types of non-covalent interactions in the spectral shifts can provide rational design principles towards developing new fluorescent probes. In this work, we investigate the origin of the red-shift in the absorption spectra of difluoro hydroxybenzylidene dimethyl imidazolinone (DFHBDI) chromophore in RNA Spinach as compared to the aqueous solution...
April 24, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28437256/electron-inelastic-mean-free-path-at-energies-below-100-ev
#15
Hieu T Nguyen-Truong
Knowledge of electron inelastic mean free paths (IMFPs) is important for electron spectroscopy and microscopy studies. Here, we determine the IMFPs at energies below 100 eV for 10 elemental solids (V, Fe, Ni, Mo, Pd, Ag, Ta, W, Pt, and Au) within the dielectric formalism, using the energy-loss function calculated in the adiabatic local-density approximation of time-dependent density-functional theory. The resulting IMFPs at a few eV above the Fermi energy are comparable to those from ab initio calculations in the GW approximation of many-body theory...
April 24, 2017: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/28437194/comparison-of-three-final-irrigation-activation-techniques-effects-on-canal-cleanness-smear-layer-removal-and-dentinal-tubule-penetration-of-two-root-canal-sealers
#16
Elmas Turkel, Emel Olga Onay, Mete Ungor
OBJECTIVE: The aim of this study was to compare three final irrigation activation techniques with respect to their effects on debridement efficacy, smear layer removal, and dentinal tubule penetration of two different root canal sealers. BACKGROUND DATA: Different applications to improve the delivery of irrigating solutions within the root canal system are currently being investigated, as not all of the mechanisms and effects of these techniques have been clearly identified...
February 22, 2017: Photomedicine and Laser Surgery
https://www.readbyqxmd.com/read/28436447/an-integrated-double-filtration-microfluidic-device-for-isolation-enrichment-and-quantification-of-urinary-extracellular-vesicles-for-detection-of-bladder-cancer
#17
Li-Guo Liang, Meng-Qi Kong, Sherry Zhou, Ye-Feng Sheng, Ping Wang, Tao Yu, Fatih Inci, Winston Patrick Kuo, Lan-Juan Li, Utkan Demirci, ShuQi Wang
Extracellular vesicles (EVs), including exosomes and microvesicles, are present in a variety of bodily fluids, and the concentration of these sub-cellular vesicles and their associated biomarkers (proteins, nucleic acids, and lipids) can be used to aid clinical diagnosis. Although ultracentrifugation is commonly used for isolation of EVs, it is highly time-consuming, labor-intensive and instrument-dependent for both research laboratories and clinical settings. Here, we developed an integrated double-filtration microfluidic device that isolated and enriched EVs with a size range of 30-200 nm from urine, and subsequently quantified the EVs via a microchip ELISA...
April 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28436381/absorption-and-transmission-of-light-in-iii-v-nanowire-arrays-for-tandem-solar-cell-applications
#18
Nicklas Anttu, Vilgailė Dagytė, Xulu Zeng, Gaute Otnes, Magnus Borgström
III-V semiconductor nanowires are a platform for next-generation photovoltaics. An interesting research direction is to embed a nanowire array in a transparent polymer, either to act as a stand-alone flexible solar cell, or to be stacked on top of a conventional Si bottom cell to create a tandem structure. To optimize the tandem cell performance, high energy photons should be absorbed in the nanowires whereas low energy photons should be transmitted to and absorbed in the Si cell. Here, through optical measurements on 1...
May 19, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28436178/k2znsn3se8-a-new-noncentrosymmetric-zinc-selenidostannate-iv-featuring-interesting-covalently-bonded-znsn3se8-2-layer-and-exhibiting-intriguing-shg-activity
#19
Molin Zhou, Xingxing Jiang, Yi Yang, Yangwu Guo, Zheshuai Lin, Jiyong Yao, Yicheng Wu
A new noncentrosymmetric zinc selenidostannate (IV) K2ZnSn3Se8 was synthesized. It features interesting covalently bonded [ZnSn3Se8]2- layers with K+ cations filling in the interlayer voids. The phonon spectrum was calculated to clarify its structural stability. Based on the X-ray diffraction data along with the Raman spectrum, the major bonding features of the title compound were identified. According to the UV-vis-NIR spectroscopy, K2ZnSn3Se8 possesses a typical direct band gap of 2.10 eV, which is in good agreement with the band structure calculations...
April 24, 2017: Chemistry, An Asian Journal
https://www.readbyqxmd.com/read/28436037/high-level-ab-initio-absorption-spectra-simulations-of-neutral-anionic-and-neutral-chromophore-of-green-fluorescence-protein-chromophore-models-in-gas-phase-and-solution
#20
Ivelina Georgieva, Adelia J A Aquino, Natasha Trendafilova, Hans Lischka
Semi-classical ab initio simulations of the absorption spectra of neutral and anionic p-hydroxybenzylidene-2,3-dimethylimidazolinone (p-HBDI), a model chromophore of Green Fluorescent Protein (GFP) and of a positively charged neutral (N+)-HBDI chromophore model were performed in gas phase with the resolution-of-identity algebraic diagrammatic construction through second-order (RI-ADC(2)) method. The calculated absorption spectra in gas phase are composed of one band centered at 3.51 eV (HBDI), 2.50 eV (HBDI(-) ) and 3...
April 24, 2017: Photochemistry and Photobiology
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