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https://www.readbyqxmd.com/read/28098960/a-hollow-spherical-carbon-derived-from-the-spray-drying-of-corncob-lignin-for-high-rate-performance-supercapacitors
#1
Zheng-Ze Pan, Liubing Dong, Wei Lv, Dequn Zheng, Zhengjie Li, Chong Luo, Cheng Zheng, Quan-Hong Yang, Feiyu Kang
Controlling the microstructure of biomass-derived carbon is of essential importance for directing its use. Herein, a hollow spherical carbon (HSC) was prepared from corncob lignin through spray drying and the subsequent heat treatment. The HSC, which is characterized by the hierarchically porous structure, delivers high rate capability when it is directly used as the electrode material for supercapacitors. This strategy that uses lignin as the precursor avoids the intrinsic difficulty in tuning the micro-structure of the biomass-derived carbons and is suitable for mass production for practical use...
January 18, 2017: Chemistry, An Asian Journal
https://www.readbyqxmd.com/read/28098953/mesoporous-germanium-anode-materials-for-lithium-ion-battery-with-exceptional-cycling-stability-in-wide-temperature-range
#2
Sinho Choi, Yoon-Gyo Cho, Jieun Kim, Nam-Soon Choi, Hyun-Kon Song, Guoxiu Wang, Soojin Park
Porous structured materials have unique architectures and are promising for lithium-ion batteries to enhance performances. In particular, mesoporous materials have many advantages including a high surface area and large void spaces which can increase reactivity and accessibility of lithium ions. This study reports a synthesis of newly developed mesoporous germanium (Ge) particles prepared by a zincothermic reduction at a mild temperature for high performance lithium-ion batteries which can operate in a wide temperature range...
January 18, 2017: Small
https://www.readbyqxmd.com/read/28098951/lessons-learned-from-a-practice-based-multisite-intervention-study-with-nurse-participants
#3
Christopher R Friese, Kari Mendelsohn-Victor, Pamela Ginex, Carol M McMahon, Alex J Fauer, Marjorie C McCullagh
PURPOSE: To identify challenges and solutions to the efficient conduct of a multisite, practice-based randomized controlled trial to improve nurses' adherence to personal protective equipment use in ambulatory oncology settings. DESIGN: The Drug Exposure Feedback and Education for Nurses' Safety (DEFENS) study is a clustered, randomized, controlled trial. Participating sites are randomized to Web-based feedback on hazardous drug exposures in the sites plus tailored messages to address barriers versus a control intervention of a Web-based continuing education video...
January 18, 2017: Journal of Nursing Scholarship
https://www.readbyqxmd.com/read/28098943/a-survey-of-the-peptide-profile-in-prato-cheese-as-measured-by-maldi-ms-and-capillary-electrophoresis
#4
Débora Parra Baptista, Francisca Diana da Silva Araújo, Marcos Nogueira Eberlin, Mirna Lúcia Gigante
In this study, we describe the characterization of the peptide profile in commercial Prato cheese by matrix-assisted laser desorption ionization mass spectrometry (MALDI-MS) and capillary electrophoresis (CE). Ten commercial Prato cheese brands were characterized via their physicochemical composition and subjected to fractionation according to solubility at pH 4.6. The pH 4.6 insoluble fraction was evaluated by CE, whereas MALDI-MS was applied to the fraction soluble at pH 4.6 and in 70% ethanol. CE revealed a characteristic pattern of hydrolysis, with formation of para-κ-casein, hydrolysis of αs1 -casein at the Phe23 - Phe24 bond, and hydrolysis of β-casein...
January 18, 2017: Journal of Food Science
https://www.readbyqxmd.com/read/28098926/relevance-of-osteoclast-specific-enzyme-activities-in-cell-based-in-vitro-resorption-assays
#5
A Bernhardt, K Koperski, M Schumacher, M Gelinsky
Cell-based in vitro resorption assays are an important tool to simulate the in vivo biodegradation of resorbable bone graft materials and to predict their clinical performance. The present study analyses the activity of osteoclast-specific enzymes as potential surrogate measures for classical pit assay, which is not applicable on irregular structured materials. Osteoclasts derived from human peripheral blood mononuclear cells were cultivated on different surfaces: calcium phosphate bone cements (CPC), dentin discs, osteoblast-derived extracellular matrix (ECM) and tissue culture polystyrene as control...
January 18, 2017: European Cells & Materials
https://www.readbyqxmd.com/read/28098825/optical-fibre-sensors-using-graphene-based-materials-a-review
#6
REVIEW
Miguel Hernaez, Carlos R Zamarreño, Sonia Melendi-Espina, Liam R Bird, Andrew G Mayes, Francisco J Arregui
Graphene and its derivatives have become the most explored materials since Novoselov and Geim (Nobel Prize winners for Physics in 2010) achieved its isolation in 2004. The exceptional properties of graphene have attracted the attention of the scientific community from different research fields, generating high impact not only in scientific journals, but also in general-interest newspapers. Optical fibre sensing is one of the many fields that can benefit from the use of these new materials, combining the amazing morphological, chemical, optical and electrical features of graphene with the advantages that optical fibre offers over other sensing strategies...
January 14, 2017: Sensors
https://www.readbyqxmd.com/read/28098824/fabrication-of-a-miniature-multi-parameter-sensor-chip-for-water-quality-assessment
#7
Bo Zhou, Chao Bian, Jianhua Tong, Shanhong Xia
Water contamination is a main inducement of human diseases. It is an important step to monitor the water quality in the water distribution system. Due to the features of large size, high cost, and complicated structure of traditional water determination sensors and devices, it is difficult to realize real-time water monitoring on a large scale. In this paper, we present a multi-parameter sensor chip, which is miniature, low-cost, and robust, to detect the pH, conductivity, and temperature of water simultaneously...
January 14, 2017: Sensors
https://www.readbyqxmd.com/read/28098745/effect-of-freeze-dried-allograft-bone-with-human-basic-fibroblast-growth-factor-containing-a-collagen-binding-domain-from-clostridium-histolyticum-collagenase-on-bone-formation-after-lumbar-posterolateral-fusion-surgery-in-rats
#8
Gen Inoue, Kentaro Uchida, Osamu Matsushita, Hisako Fujimaki, Wataru Saito, Masayuki Miyagi, Hiroyuki Sekiguchi, Nozomu Nishi, Seiji Ohtori, Mizuki Yogoro, Masashi Takaso
STUDY DESIGN: An experimental study. OBJECTIVE: To evaluate the effectiveness of freeze-dried bone allograft (FDBA) with basic fibroblast growth factor (bFGF) fused with the polycystic kidney disease domain (PKD) and the collagen-biding domain (CBD) of Clostridium histolyticum collagenase, for the acceleration of lumbar posterolateral fusion in rats. SUMMARY OF BACKGROUND DATA: Reports indicate bFGF is an effective growth factor with osteogenic potential for promoting bone regeneration, although its efficiency decreases rapidly following its diffusion in body fluid from the host site...
January 16, 2017: Spine
https://www.readbyqxmd.com/read/28098736/foveal-exudate-and-choroidal-neovascularization-in-atypical-cases-of-multiple-evanescent-white-dot-syndrome
#9
Kevin C Chen, Marcela Marsiglia, Rosa Dolz-Marco, Sarwar Zahid, Sarah Mrejen, Jose S Pulido, Salomon Y Cohen, Benjamin Freilich, Lawrence A Yannuzzi, K Bailey Freund
PURPOSE: To describe atypical cases of multiple evanescent white dot syndrome (MEWDS) associated with foveal exudation, increased choroidal thickness, and secondary Type 2 (subretinal) neovascularization. METHODS: Four cases of atypical MEWDS were studied at a retina referral center. Patients underwent evaluation with multimodal retinal imaging, including fluorescein angiography, indocyanine green angiography, spectral-domain and enhanced depth imaging optical coherence tomography (OCT)...
January 16, 2017: Retina
https://www.readbyqxmd.com/read/28098497/magnetic-resonance-arthrography-results-that-indicate-surgical-treatment-for-partial-articular-sided-supraspinatus-tendon-avulsion-a-retrospective-study-in-a-tertiary-center
#10
Seok Hahn, Young Han Lee, Yong-Min Chun, Eun Hae Park, Jin-Suck Suh
Background Specific findings on magnetic resonance arthrography (MRA) that indicate the need for surgery in patients with partial articular-sided supraspinatus tendon avulsion (PASTA) are not well understood. Purpose To determine which MRA findings are characteristic of patients who undergo surgery for PASTA. Material and Methods From July 2011 to February 2014, MRA findings for patients treated for PASTA were retrospectively reviewed. The patients were divided into two groups: conservative treatment and surgical repair...
January 1, 2017: Acta Radiologica
https://www.readbyqxmd.com/read/28098467/modular-two-step-approach-for-the-stereodivergent-synthesis-of-1-3-diamines-with-three-continuous-stereocenters
#11
Juliette Halli, Michael Bolte, Jan Bats, Georg Manolikakes
A two-step reaction sequence for the highly stereodivergent construction of 1,3-diamines with three continuous stereocenters is reported. This novel method enables the controlled synthesis of any given diastereomer of the 1,3-diamine scaffold from a simple set of starting materials in a highly modular manner. The disclosed approach is based on the reaction of an enamide with an in situ generated N-acylimine followed by a subsequent trapping of the generated intermediate with a suitable nucleophile. By careful choice of starting materials, reagents, and reaction conditions, each stereocenter can be constructed in a highly selective fashion...
January 18, 2017: Organic Letters
https://www.readbyqxmd.com/read/28098465/rejection-of-commonly-used-electrolyte-in-asymmetric-flow-field-flow-fractionation-effects-of-membrane-molecular-weight-cut-off-size-fluid-dynamics-and-valence-of-electrolytes
#12
Thilak K Mudalige, Haiou Qu, Sean W Linder
Asymmetric flow field flow fractionation (AF4) is an efficient size based separation technique for the characterization of submicron size particulates. In AF4, membranes having various molecular weight cut-off sizes are used as a barrier to retain particles while allowing carrier fluid containing electrolytes to permeate. Here, we hypothesized that electrolyte rejection by the barrier membrane lead to the accumulation of the electrolytes in the channel during operation. Electrolyte accumulation can cause various adverse effects which can lead to membrane fouling...
January 18, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28098459/two-dimensional-sno-anodes-with-tunable-number-of-atomic-layers-for-sodium-ion-batteries
#13
Fan Zhang, Jiajie Zhu, Daliang Zhang, Udo Schwingenschlögl, Husam N Alshareef
We have systematically changed the number of atomic layers stacked in 2D SnO nanosheet anodes and studied their Sodium Ion Battery (SIB) performance. The results indicate that as the number of atomic SnO layers in a sheet decreases, both the capacity and cycling stability of the Na ion battery improve. The thinnest SnO nanosheet anodes (2-6 SnO monolayers) exhibited the best performance. Specifically, an initial discharge and charge capacity of 1072 and 848 mAh g-1 were observed, respectively, at 0.1 A g-1...
January 18, 2017: Nano Letters
https://www.readbyqxmd.com/read/28098458/sequence-of-silicon-monolayer-structures-grown-on-a-ru-surface-from-a-herringbone-structure-to-silicene
#14
Li Huang, Yanfang Zhang, Yu-Yang Zhang, Wenyan Xu, Yande Que, En Li, Jinbo Pan, Yeliang Wang, Yunqi Liu, Shixuan Du, Sokrates T Pantelides, Hong-Jun Gao
Silicon-based two-dimensional (2D) materials are uniquely suited for integration in Si-based electronics. Silicene, an analog of graphene, was recently fabricated on several substrates and was used to make a field-effect transistor. Here, we report that, when Ru(0001) is used as a substrate, a range of distinct monolayer silicon structures forms, evolving towards silicene with increasing Si coverage. Low Si coverage produces a herringbone structure, a hitherto undiscovered 2D phase of silicon. With increasing Si coverage, herringbone elbows evolve into silicene-like honeycomb stripes under tension, resulting in a herringbone-honeycomb 2D superlattice...
January 18, 2017: Nano Letters
https://www.readbyqxmd.com/read/28098446/determination-of-carbonyl-compounds-in-cork-agglomerates-by-gdme-hplc-uv-identification-of-the-extracted-compounds-by-hplc-ms-ms
#15
Pedro Francisco Brandão, Rui Miguel Ramos, Paulo Joaquim Ferreira de Almeida, Jose António Rodrigues
A new approach is proposed for the extraction and determination of carbonyl compounds in solid samples, like wood or cork materials. Cork products are used as building materials due to its singular characteristics; however little is known about its aldehyde emission potential and content. Sample preparation was done by using a gas-diffusion microextraction (GDME) device, for the direct extraction of volatile aldehydes and derivatization with 2,4-dinitrophenylhydrazine. Analytical determination of the extracts was done by HPLC-UV, with detection at 360 nm...
January 18, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28098442/a-nasicon-type-mg0-5ti2-po4-3-negative-electrode-material-exhibits-different-electrochemical-energy-storage-mechanisms-in-na-ion-and-li-ion-batteries
#16
Yingying Zhao, Zhixuan Wei, Qiang Pang, Yingjin Wei, Yongmao Cai, Qiang Fu, Fei Du, Angelina Sarapulova, Helmut Ehrenberg, Bingbing Liu, Gang Chen
A Carbon-coated Mg0.5Ti2(PO4)3 polyanion material was prepared by the sol-gel method and then studied as the negative electrode materials for lithium-ion and sodium-ion batteries. The material showed a specific capacity of 268.6 mAh g-1 in the voltage window of 0.01-3.0 V vs. Na+/Na0. Due to the fast diffusion of Na+ in the NASICON framework, the material exhibited superior rate capability with a specific capacity of 94.4 mAh g-1 at a current density of 5A g-1. Additionally, 99.1 % capacity retention was achieved after 300 cycles, demonstrating excellent cycle stability...
January 18, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28098441/ultrasmooth-perovskite-film-via-mixed-anti-solvent-strategy-with-improved-efficiency
#17
Yu Yu, Songwang Yang, Lei Lei, Qipeng Cao, Jun Shao, Sheng Zhang, Yan Liu
Most antisolvents employed in previous research were miscible with perovskite precursor solution. They always led to fast formation of perovskite even if the intermediate stage existed, which was not beneficial to obtain high quality perovskite films and made the formation process less controllable. In this work, a novel ethyl ether/n-hexane mixed antisolvent (MAS) was used to achieve high nucleation density and slow down the formation process of perovskite, producing films with improved orientation of grains and ultrasmooth surfaces...
January 18, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28098440/corrosion-protection-of-copper-using-al2o3-tio2-zno-hfo2-and-zro2-atomic-layer-deposition
#18
James S Daubert, Grant T Hill, Hannah N Gotsch, Antoine P Gremaud, Jennifer S Ovental, Philip S Williams, Christopher J Oldham, Gregory N Parsons
Atomic layer deposition (ALD) is a viable means to add corrosion protection to copper metal. Ultrathin films of Al2O3, TiO2, ZnO, HfO2, and ZrO2 were deposited on copper metal using ALD, and their corrosion protection properties were measured using electrochemical impedance spectroscopy (EIS) and linear sweep voltammetry (LSV). Analysis of ∼50 nm thick films of each metal oxide demonstrated low electrochemical porosity and provided enhanced corrosion protection from aqueous NaCl solution. The surface pretreatment and roughness was found to affect the extent of the corrosion protection...
January 18, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28098434/method-for-the-unique-identification-of-hyperelastic-material-properties-using-full-field-measures-application-to-the-passive-myocardium-material-response
#19
Luigi E Perotti, Aditya V Ponnaluri, Shankarjee Krishnamoorthi, Daniel Balzani, Daniel B Ennis, William S Klug
Quantitative measurement of the material properties (e.g., stiffness) of biological tissues is poised to become a powerful diagnostic tool. There are currently several methods in the literature to estimating material stiffness and we extend this work by formulating a framework that leads to uniquely identified material properties. We design an approach to work with full field displacement data - i.e., we assume the displacement field due to the applied forces is known both on the boundaries and also within the interior of the body of interest - and seek stiffness parameters that lead to balanced internal and external forces in a model...
January 18, 2017: International Journal for Numerical Methods in Biomedical Engineering
https://www.readbyqxmd.com/read/28098431/synthesis-and-characterisation-of-reduced-graphene-oxide-bismuth-composite-for-electrodes-in-electrochemical-energy-storage-devices
#20
Jiabin Wang, Han Zhang, Michael R C Hunt, Alasdair Charles, Jie Tang, Oana Bretcanu, David Walker, Khalil T Hassan, Yige Sun, Lidija Šiller
A reduced graphene oxide/bismuth (rGO/Bi) composite was synthesized for the first time using a polyol process at a low reaction temperature and with a short reaction time (60 °C and 3 hours, respectively). The as-prepared sample is structured with 20-50 nm diameter bismuth particles distributed on the rGO sheets. The rGO/Bi composite displays a combination of capacitive and battery-like charge storage, achieving a specific capacity value of 773 C g(-1) at a current density of 0.2 A g(-1) when charged to 1 V...
January 18, 2017: ChemSusChem
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