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https://www.readbyqxmd.com/read/28107618/carbon-hollow-microspheres-with-a-designable-mesoporous-shell-for-high-performance-electromagnetic-wave-absorption
#1
Hailong Xu, Xiaowei Yin, Meng Zhu, Meikang Han, Zexin Hou, Xinliang Li, Litong Zhang, Laifei Cheng
In this work, mesoporous carbon hollow microspheres (PCHMs) with designable mesoporous shell and interior void are constructed by a facile in situ stöber templating approach and a pyrolysis-etching process. The PCHMs are characterized by scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectra, Raman, nitrogen adsorption and desorption system. A uniform mesoporous shell (pore size 4.7 nm) with a thickness of 55 nm and a cavity size of 345 nm is realized. The composite of paraffin mixed with 20 wt...
January 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28107503/osteopontin-affects-insulin-vesicle-localization-and-ca2-homeostasis-in-pancreatic-beta-cells-from-female-mice
#2
Anna Wendt, Inês G Mollet, Anki Knutsson, Victor S Bolmgren, Anna Hultgårdh-Nilsson, Maria F Gomez, Lena Eliasson
Type 2 diabetic patients suffer from insulin resistance and reduced insulin secretion. Osteopontin (OPN), a versatile protein expressed in several tissues throughout the body including the islets of Langerhans, has previously been implicated in the development of insulin resistance. Here we have investigated the role of OPN in insulin secretion using an OPN knock out mouse model (OPN-/-). Ultra-structural analyzes of islets from OPN-/- and WT mice indicated weaker cell-cell connections between the islet cells in the OPN-/- mouse compared to WT...
2017: PloS One
https://www.readbyqxmd.com/read/28107468/micro-x-ray-computed-tomography-mass-loss-assessment-of-different-uhmwpe-a-hip-joint-simulator-study-on-standard-vs-cross-linked-polyethylene
#3
Saverio Affatato, Filippo Zanini, Simone Carmignato
More than 60.000 hip arthroplasty are performed every year in Italy. Although Ultra-High-Molecular-Weight-Polyethylene remains the most used material as acetabular cup, wear of this material induces over time in vivo a foreign-body response and consequently osteolysis, pain, and the need of implant revision. Furthermore, oxidative wear of the polyethylene provoke several and severe failures. To solve these problems, highly cross-linked polyethylene and Vitamin-E-stabilized polyethylene were introduced in the last years...
2017: PloS One
https://www.readbyqxmd.com/read/28107423/characterization-of-the-drug-resistance-profiles-of-patients-infected-with-crf07_bc-using-phenotypic-assay-and-ultra-deep-pyrosequencing
#4
Szu-Wei Huang, Wei-You Li, Wen-Hung Wang, Yu-Ting Lin, Chih-Hung Chou, Marcelo Chen, Hsien-Da Huang, Yen-Hsu Chen, Po-Liang Lu, Sheng-Fan Wang, Shinichi Oka, Yi-Ming Arthur Chen
The usefulness of ultra-deep pyrosequencing (UDPS) for the diagnosis of HIV-1 drug resistance (DR) remains to be determined. Previously, we reported an explosive outbreak of HIV-1 circulating recombinant form (CRF) 07_BC among injection drug users (IDUs) in Taiwan in 2004. The goal of this study was to characterize the DR of CRF07_BC strains using different assays including UDPS. Seven CRF07_BC isolates including 4 from early epidemic (collected in 2004-2005) and 3 from late epidemic (collected in 2008) were obtained from treatment-naïve patient's peripheral blood mononuclear cells...
2017: PloS One
https://www.readbyqxmd.com/read/28106806/uhf-signal-processing-and-pattern-recognition-of-partial-discharge-in-gas-insulated-switchgear-using-chromatic-methodology
#5
Xiaohua Wang, Xi Li, Mingzhe Rong, Dingli Xie, Dan Ding, Zhixiang Wang
The ultra-high frequency (UHF) method is widely used in insulation condition assessment. However, UHF signal processing algorithms are complicated and the size of the result is large, which hinders extracting features and recognizing partial discharge (PD) patterns. This article investigated the chromatic methodology that is novel in PD detection. The principle of chromatic methodologies in color science are introduced. The chromatic processing represents UHF signals sparsely. The UHF signals obtained from PD experiments were processed using chromatic methodology and characterized by three parameters in chromatic space (H, L, and S representing dominant wavelength, signal strength, and saturation, respectively)...
January 18, 2017: Sensors
https://www.readbyqxmd.com/read/28106768/lipid-and-glycolipid-isomer-analyses-using-ultra-high-resolution-ion-mobility-spectrometry-separations
#6
Roza Wojcik, Ian K Webb, Liulin Deng, Sandilya V B Garimella, Spencer A Prost, Yehia M Ibrahim, Erin S Baker, Richard D Smith
Understanding the biological roles and mechanisms of lipids and glycolipids is challenging due to the vast number of possible isomers that may exist. Mass spectrometry (MS) measurements are currently the dominant approach for studying and providing detailed information on lipid and glycolipid presence and changes. However, difficulties in distinguishing the many structural isomers, due to the distinct lipid acyl chain positions, double bond locations or specific glycan types, inhibit the delineation and assignment of their biological roles...
January 18, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28106519/subunit-mass-analysis-for-monitoring-antibody-oxidation
#7
Izabela Sokolowska, Jingjie Mo, Jia Dong, Michael J Lewis, Ping Hu
Methionine oxidation is a common posttranslational modification (PTM) of monoclonal antibodies (mAbs). Oxidation can reduce the in-vivo half-life, efficacy and stability of the product. Peptide mapping is commonly used to monitor the levels of oxidation, but this is a relatively time-consuming method. A high-throughput, automated subunit mass analysis method was developed to monitor antibody methionine oxidation. In this method, samples were treated with IdeS, EndoS and dithiothreitol to generate three individual IgG subunits (light chain, Fd' and single chain Fc)...
January 20, 2017: MAbs
https://www.readbyqxmd.com/read/28106374/extremely-high-barrier-performance-of-organic-inorganic-nanolaminated-thin-films-for-organic-light-emitting-diodes
#8
Kwan Hyuck Yoon, Harrison Sejoon Kim, Kyu Seok Han, Seung Hun Kim, Yong-Eun Koo Lee, Nabeen K Shrestha, Seung Yong Song, Myung Mo Sung
This work presents a novel barrier thin film based on an organic-inorganic nanolaminate, which consists of alternating nanolayers of self-assembled organic layers (SAOLs) and Al2O3. The SAOLs-Al2O3 nanolaminated films were deposited using a combination of molecular layer deposition and atomic layer deposition techniques at 80 °C. Modulation of the relative thickness ratio of the SAOLs and Al2O3 enabled control over the elastic modulus and stress in the films. Furthermore, the SAOLs-Al2O3 thin film achieved a high degree of mechanical flexibility, excellent transmittance (> 95%), and an ultra-low water-vapor transmission rate (2...
January 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28106339/determination-of-19-sulfonamides-residues-in-pork-samples-by-combining-quechers-with-dispersive-liquid-liquid-microextraction-followed-by-uhplc-ms-ms
#9
Xiaojing Li, Hong Yu, Rongfei Peng, Pingsheng Gan
A new simple and rapid pretreatment method for simultaneous determination of 19 sulfonamides in pork samples was developed through combining the QuEChERS method with dispersive liquid-liquid microextraction followed by ultra high performance liquid chromatography with tandem mass spectrometry. The sample preparation involves extraction/partitioning with QuEChERS method followed by dispersive liquid-liquid microextraction using tetrachloroethane as extractive solvent and the acetonitrile extract as dispersive solvent which obtained by QuEChERS...
January 20, 2017: Journal of Separation Science
https://www.readbyqxmd.com/read/28106219/surface-and-interface-engineering-of-fept-c-nanocatalysts-for-electro-catalytic-methanol-oxidation-enhanced-activity-and-durability
#10
Junmei Wang, Zhenlei Wang, Shuai Li, Rongming Wang, Yujun Song
A methodology by coupling a microfluidic-batch process with in situ carbon-black mixing, successive annealing and de-alloying post-treatment was developed for engineering surface and interface microstructures of FePt/C nanocomposites. Ultra-small angular FePt nanocrystals rich in vertexes/terraces/steps and with Pt contents gradually increasing from the inner to the outer part can be synthesized at certain Fe/Pt atomic ratios (2/1 or 1.1/1), which can directly grow on carbon-black for enhanced nanocrystal-carbon interface interaction by introducing the in situ carbon-black mixing process...
January 20, 2017: Nanoscale
https://www.readbyqxmd.com/read/28106215/the-degree-of-processing-of-foods-which-are-most-widely-consumed-by-the-french-elderly-population-is-associated-with-satiety-and-glycemic-potentials-and-nutrient-profiles
#11
Anthony Fardet, Caroline Méjean, Hélène Labouré, Valentina A Andreeva, Gilles Feron
Food processing impacts both food structure and nutritional density. The effect of food structure on satiety and glycemic potentials is well recognized. However, the association between processing, satiety and glycemic potentials and nutrient profiles has not been much studied, especially in the diets of the elderly. Therefore, this study aimed at exploring relations between the level of food processing, consumption and nutrient profiles and satiety and glycemic potentials among 6686 French elderly people (≥65 years)...
January 20, 2017: Food & Function
https://www.readbyqxmd.com/read/28106209/sub-100-nm-wrinkling-of-polydimethylsiloxane-by-double-frontal-oxidation
#12
Manuela Nania, Fabrizia Foglia, Omar K Matar, João T Cabral
We demonstrate nanoscale wrinkling on polydimethylsiloxane (PDMS) at sub-100 nm length scales via a (double) frontal surface oxidation coupled with a mechanical compression. The kinetics of the glassy skin propagation is resolved by neutron and X-ray reflectivity, and atomic force microscopy, combined with mechanical wrinkling experiments to evaluate the resulting pattern formation. In conventional PDMS surface oxidation, the smallest wrinkling patterns attainable have an intrinsic lower wavelength limit due to the coupling of skin formation and front propagation at fixed strain εprestrain, whose maximum is, in turn, set by material failure...
January 20, 2017: Nanoscale
https://www.readbyqxmd.com/read/28106132/m-otdr-sensing-system-based-on-3d-encoded-microstructures
#13
Qizhen Sun, Fan Ai, Deming Liu, Jianwei Cheng, Hongbo Luo, Kuan Peng, Yiyang Luo, Zhijun Yan, Perry Ping Shum
In this work, a quasi-distributed sensing scheme named as microstructured OTDR (M-OTDR) by introducing ultra-weak microstructures along the fiber is proposed. Owing to its relative higher reflectivity compared with the backscattered coefficient in fiber and three dimensional (3D) i.e. wavelength/frequency/time encoded property, the M-OTDR system exhibits the superiorities of high signal to noise ratio (SNR), high spatial resolution of millimeter level and high multiplexing capacity up to several ten thousands theoretically...
January 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28106084/silicon-graphene-conductive-photodetector-with-ultra-high-responsivity
#14
Jingjing Liu, Yanlong Yin, Longhai Yu, Yaocheng Shi, Di Liang, Daoxin Dai
Graphene is attractive for realizing optoelectronic devices, including photodetectors because of the unique advantages. It can easily co-work with other semiconductors to form a Schottky junction, in which the photo-carrier generated by light absorption in the semiconductor might be transported to the graphene layer efficiently by the build-in field. It changes the graphene conduction greatly and provides the possibility of realizing a graphene-based conductive-mode photodetector. Here we design and demonstrate a silicon-graphene conductive photodetector with improved responsivity and response speed...
January 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28106058/selective-gating-to-vibrational-modes-through-resonant-x-ray-scattering
#15
Rafael C Couto, Vinícius V Cruz, Emelie Ertan, Sebastian Eckert, Mattis Fondell, Marcus Dantz, Brian Kennedy, Thorsten Schmitt, Annette Pietzsch, Freddy F Guimarães, Hans Ågren, Faris Gel'mukhanov, Michael Odelius, Victor Kimberg, Alexander Föhlisch
The dynamics of fragmentation and vibration of molecular systems with a large number of coupled degrees of freedom are key aspects for understanding chemical reactivity and properties. Here we present a resonant inelastic X-ray scattering (RIXS) study to show how it is possible to break down such a complex multidimensional problem into elementary components. Local multimode nuclear wave packets created by X-ray excitation to different core-excited potential energy surfaces (PESs) will act as spatial gates to selectively probe the particular ground-state vibrational modes and, hence, the PES along these modes...
January 20, 2017: Nature Communications
https://www.readbyqxmd.com/read/28106054/extremely-broadband-on-chip-optical-nonreciprocity-enabled-by-mimicking-nonlinear-anti-adiabatic-quantum-jumps-near-exceptional-points
#16
Youngsun Choi, Choloong Hahn, Jae Woong Yoon, Seok Ho Song, Pierre Berini
Time-asymmetric state-evolution properties while encircling an exceptional point are presently of great interest in search of new principles for controlling atomic and optical systems. Here, we show that encircling-an-exceptional-point interactions that are essentially reciprocal in the linear interaction regime make a plausible nonlinear integrated optical device architecture highly nonreciprocal over an extremely broad spectrum. In the proposed strategy, we describe an experimentally realizable coupled-waveguide structure that supports an encircling-an-exceptional-point parametric evolution under the influence of a gain saturation nonlinearity...
January 20, 2017: Nature Communications
https://www.readbyqxmd.com/read/28105994/angiographic-outcomes-of-orsiro-biodegradable-polymer-sirolimus-eluting-stents-and-resolute-integrity-durable-polymer-zotarolimus-eluting-stents-results-of-the-orient-trial
#17
Si-Hyuck Kang, Woo-Young Chung, Joo Myung Lee, Jin-Joo Park, Chang-Hwan Yoon, Jung-Won Suh, Young-Seok Cho, Joon-Hyung Doh, Jin Man Cho, Jang-Whan Bae, Tae-Jin Youn, In-Ho Chae
AIMS: We performed a randomised controlled open-label non-inferiority trial to compare angiographic outcomes between the ultra-thin strut, biodegradable hybrid polymer Orsiro sirolimus-eluting stent (O-SES) and the durable biocompatible polymer Resolute Integrity zotarolimus-eluting stent (R-ZES). METHODS AND RESULTS: A total of 372 patients planned to undergo percutaneous coronary revascularisation were randomly assigned 2:1 to treatment with O-SES or R-ZES (250 and 122 patients, respectively)...
January 20, 2017: EuroIntervention
https://www.readbyqxmd.com/read/28105975/simultaneous-determination-of-first-line-4-fdc-antituberculosis-drugs-by-uhplc-uv-and-hplc-uv-a-comparative-study
#18
Pedro H C Franco, Paula R Chellini, Marcone A L Oliveira, Gerson A Pianetti
Tuberculosis is the second most deadly infectiousdisease, surpassed only by HIV/AIDS, and hasresulted in over 1 billion deaths in the last200 years. The World Health Organization estimatesthat in 2014, 9.6 million people were infected bythis disease and 1.5 million had died. First-choicetreatment consists of fixed-dose combinationtablets containing rifampicin, isoniazid,pyrazinamide, and ethambutol hydrochloride(4-FDC). There are pharmacopeial protocolsavailable to test 4-FDC, but they are prolonged,two-step methods...
January 19, 2017: Journal of AOAC International
https://www.readbyqxmd.com/read/28105902/cost-effectiveness-of-using-adjunctive-porcine-small-intestine-submucosa-tri-layer-matrix-compared-with-standard-care-in-managing-diabetic-foot-ulcers-in-the-us
#19
J F Guest, D Weidlich, H Singh, J La Fontaine, A Garrett, C J Abularrage, C R Waycaster
OBJECTIVE: To estimate the cost-effectiveness of using tri-layer porcine small intestine submucosa (SIS; Oasis Ultra) as an adjunct to standard care compared with standard care alone in managing diabetic foot ulcers (DFUs) in the US, from the perspective of Medicare. METHOD: A Markov model was constructed to simulate the management of diabetic neuropathic lower extremity ulcers over a period of one year in the US. The model was used to estimate the cost-effectiveness of initially using adjunctive SIS compared with standard care alone to treat a DFU in the US at 2016 prices...
January 2, 2017: Journal of Wound Care
https://www.readbyqxmd.com/read/28105856/evaluation-of-in-silico-tools-to-predict-the-skin-sensitization-potential-of-chemicals
#20
G R Verheyen, E Braeken, K Van Deun, S Van Miert
Public domain and commercial in silico tools were compared for their performance in predicting the skin sensitization potential of chemicals. The packages were either statistical based (Vega, CASE Ultra) or rule based (OECD Toolbox, Toxtree, Derek Nexus). In practice, several of these in silico tools are used in gap filling and read-across, but here their use was limited to make predictions based on presence/absence of structural features associated to sensitization. The top 400 ranking substances of the ATSDR 2011 Priority List of Hazardous Substances were selected as a starting point...
January 20, 2017: SAR and QSAR in Environmental Research
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