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https://www.readbyqxmd.com/read/28819936/introducing-navigation-during-melanoma-related-sentinel-lymph-node-procedures-in-the-head-and-neck-region
#1
Gijs H KleinJan, Baris Karakullukçu, W Martin C Klop, Thijs Engelen, Nynke S van den Berg, Fijs W B van Leeuwen
BACKGROUND: Intraoperative sentinel node (SN) identification in patients with head-and-neck malignancies can be challenging due to unexpected drainage patterns and anatomical complexity. Here, intraoperative navigation-based guidance technologies may provide outcome. In this study, gamma camera-based freehandSPECT was evaluated in combination with the hybrid tracer ICG-(99m)Tc-nanocolloid. MATERIALS AND METHODS: Eight patients with melanoma located in the head-and-neck area were included...
August 17, 2017: EJNMMI Research
https://www.readbyqxmd.com/read/28816433/syndiotactic-polystyrene-based-ionogel-membranes-for-high-temperature-electrochemical-applications
#2
Prasad Raut, Wenfeng Liang, Yu-Ming Chen, Yu Zhu, Sadhan C Jana
This work focuses on ionogel membranes for use in Li-ion batteries fabricated from syndiotactic polystyrene (sPS) gels filled with ionic liquids (ILs). The aim is to increase the operating temperature of Li-ion batteries. s. Thermal stability and safe operation of Li-ion batteries are two key attributes for their success in hybrid vehicles and other high temperature applications. The volatility of the liquid electrolytes in current lithium-ion battery technology causes thermal runaway leading to fire, explosion, and swelling of the cell...
August 17, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28812880/an-exceptionally-narrow-band-gap-%C3%A2-4-ev-silicate-predicted-in-the-cubic-perovskite-structure-basio3
#3
Hidenori Hiramatsu, Hitoshi Yusa, Ryo Igarashi, Yasuo Ohishi, Toshio Kamiya, Hideo Hosono
The electronic structures of 35 A(2+)B(4+)O3 ternary cubic perovskite oxides, including their hypothetical chemical compositions, were calculated by a hybrid functional method with the expectation that peculiar electronic structures and unique carrier transport properties suitable for semiconductor applications would be hidden in high-symmetry cubic perovskite oxides. We found unique electronic structures of Si-based oxides (A = Mg, Ca, Sr, and Ba, and B = Si). In particular, the unreported cubic BaSiO3 has a very narrow band gap (4...
August 16, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28799236/tough-self-healing-elastomers-by-molecular-enforced-integration-of-covalent-and-reversible-networks
#4
Jinrong Wu, Li-Heng Cai, David A Weitz
Self-healing polymers crosslinked by solely reversible bonds are intrinsically weaker than common covalently crosslinked networks. Introducing covalent crosslinks into a reversible network would improve mechanical strength. It is challenging, however, to apply this concept to "dry" elastomers, largely because reversible crosslinks such as hydrogen bonds are often polar motifs, whereas covalent crosslinks are nonpolar motifs. These two types of bonds are intrinsically immiscible without cosolvents. Here, we design and fabricate a hybrid polymer network by crosslinking randomly branched polymers carrying motifs that can form both reversible hydrogen bonds and permanent covalent crosslinks...
August 11, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28797911/a-prospective-evaluation-of-radiation-free-direct-solitary-cholangioscopy-for-the-management-of-choledocholithiasis
#5
Monique T Barakat, Mohit Girotra, Abhishek Choudhary, Robert J Huang, Saurabh Sethi, Subhas Banerjee
BACKGROUND AND AIMS: Endoscopy has replaced many radiological studies for the GI tract. However, ERCP remains a hybrid endoscopic-fluoroscopic procedure, which limits its portable delivery, creates delays due to fluoroscopy room unavailability and exposes patients/providers to radiation. We evaluated fluoroscopy/radiation-free management of patients with non-complex choledocholithiasis using direct solitary cholangioscopy (DSC). METHODS: Patients underwent fluoroscopy-free biliary cannulation, sphincterotomy then cholangioscopy to establish location, number/size of stones and document distance from ampulla to bifurcation to guide balloon advancement...
August 7, 2017: Gastrointestinal Endoscopy
https://www.readbyqxmd.com/read/28795706/photocatalytic-alkene-reduction-by-a-b12-tio2-hybrid-catalyst-coupled-with-c-f-bond-cleavage-for-gem-difluoroolefin-synthesis
#6
Hui Tian, Hisashi Shimakoshi, Kenji Imamura, Yoshihito Shiota, Kazunari Yoshizawa, Yoshio Hisaeda
Photocatalytic syntheses of gem-difluoroolefins were performed using the B12-TiO2 hybrid catalyst during the C[double bond, length as m-dash]C bond reduction of α-trifluoromethyl styrenes with C-F bond cleavage at room temperature under nitrogen. The gem-difluoroolefins were used as synthetic precursors for fluorinated cyclopropanes.
August 10, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28783354/phase-transition-dielectrics-single-ion-conductance-and-thermochromic-luminescence-of-a-inorganic-organic-hybrid-of-triethylpropylammonium-pbi3
#7
Meng-Jin Wang, Xuan-Rong Chen, Yuan-Bo Tong, Guo-Jun Yuan, Xiao-Ming Ren, Jian-Lan Liu
In this study, we used the facile solvent evaporation method to achieve the inorganic-organic hybrid crystals of [triethylpropylammonium][PbI3], which have been characterized by elemental analysis, IR spectroscopy, thermogravimetric analysis, and differential scanning calorimetry as well as single-crystal X-ray structure analysis. The hybrid solid crystallizes in the monoclinic space group P21/c at room temperature and is composed of one-dimensional [PbI3]∞ chains, where the neighboring PbI6 coordination octahedra connect together via the face-sharing mode and the organic cations fall in the spaces between [PbI3]∞ chains...
August 7, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28782790/plasmon-trion-and-plasmon-exciton-resonance-energy-transfer-from-a-single-plasmonic-nanoparticle-to-monolayer-mos2
#8
Mingsong Wang, Wei Li, Leonardo Scarabelli, Bharath Bangalore Rajeeva, Mauricio Terrones, Luis M Liz-Marzán, Deji Akinwande, Yuebing Zheng
Resonance energy transfer (RET) from plasmonic metal nanoparticles (NPs) to two-dimensional (2D) materials enhances the performance of 2D optoelectronic devices and sensors. Herein, single-NP scattering spectroscopy is employed to investigate plasmon-trion and plasmon-exciton RET from single Au nanotriangles (AuNTs) to monolayer MoS2, at room temperature. The large quantum confinement and reduced dielectric screening in monolayer MoS2 facilitates efficient RET between single plasmonic metal NPs and the monolayer...
August 7, 2017: Nanoscale
https://www.readbyqxmd.com/read/28772956/micro-mechanical-response-of-an-al-mg-hybrid-system-synthesized-by-high-pressure-torsion
#9
REVIEW
Megumi Kawasaki, Jae-Il Jang
This paper summarizes recent efforts to evaluate the potential for the formation of a metal matrix nanocomposite (MMNC) by processing two commercial bulk metals of aluminum and magnesium alloy through high-pressure torsion (HPT) at room temperature. After significant evolutions in microstructures, successful fabrication of an Al-Mg hybrid system was demonstrated by observing unique microstructures consisting of a multi-layered structure and MMNC. Moreover, the evolution of small-scale mechanical properties was examined through the novel technique of nanoindentation and the improvement in plasticity was estimated by calculating the strain rate sensitivity of the Al-Mg hybrid system after HPT...
May 30, 2017: Materials
https://www.readbyqxmd.com/read/28772578/screen-printed-fabrication-of-pedot-pss-silver-nanowire-composite-films-for-transparent-heaters
#10
Xin He, Ruihui He, Qiuming Lan, Weijie Wu, Feng Duan, Jundong Xiao, Mei Zhang, Qingguang Zeng, Jianhao Wu, Junyan Liu
A transparent and flexible film heater was fabricated; based on a hybrid structure of poly(3,4-ethylenedioxythiophene) poly(styrenesulfonate) (PEDOT:PSS) and silver nanowires (Ag NWs) using a screen printing; which is a scalable production technology. The resulting film integrates the advantages of the two conductive materials; easy film-forming and strong adhesion to the substrate of the polymer PEDOT:PSS; and high conductivity of the Ag NWs. The fabricated composite films with different NW densities exhibited the transmittance within the range from 82...
February 23, 2017: Materials
https://www.readbyqxmd.com/read/28772519/cr13ni5si2-based-composite-coating-on-copper-deposited-using-pulse-laser-induction-cladding
#11
Ke Wang, Hailin Wang, Guangzhi Zhu, Xiao Zhu
A Cr13Ni5Si2-based composite coating was successfully deposited on copper by pulse laser induction hybrid cladding (PLIC), and its high-temperature wear behavior was investigated. Temperature evolutions associated with crack behaviors in PLIC were analyzed and compared with pulse laser cladding (PLC) using the finite element method. The microstructure and present phases were analyzed using scanning electron microscopy and X-ray diffraction. Compared with continuous laser induction cladding, the higher peak power offered by PLIC ensures metallurgical bonding between highly reflective copper substrate and coating...
February 10, 2017: Materials
https://www.readbyqxmd.com/read/28771963/organic-nanocrystals-with-bright-red-persistent-room-temperature-phosphorescence-for-biological-applications
#12
Seyed Mohammad Ali Fateminia, Zhu Mao, Zhiyong Yang, Shidang Xu, Zhenguo Chi, Bin Liu
Persistent room-temperature phosphorescence (RTP) in pure organic materials has attracted great attention due to their unique optical properties. The design of organic materials with bright and red persistent RTP remains challenging. Herein, we report a new design strategy for realizing high brightness and long lifetime of red-emissive RTP molecules, which is based on introducing an alkoxy spacer between the hybrid units in the molecule. The spacer offers easy Br-H bond formation during crystallization, which also facilitates intermolecular electron coupling to favor persistent RTP...
August 3, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28771002/importance-of-steric-influences-in-the-construction-of-multicomponent-hybrid-polymetallic-clusters
#13
Ross McLellan, Maria A Palacios, Sergio Sanz, Euan K Brechin, Scott J Dalgarno
The straightforward room temperature synthesis of hybrid polymetallic manganese clusters is investigated, exploiting complementary ligand combinations of p-tert-butylcalix[4]arene and salicylaldoximes. Eight new [Mn(III)7Mn(II)] clusters have been prepared wherein the simple substitution of alkyl or aryl groups at well-defined positions of the salicylaldoxime scaffold leads to two distinct structure types that, while exhibiting the same general topology, contain the unique Mn(II) ion in different positions...
August 3, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28768918/advantages-and-disadvantages-of-multi-axis-intraoperative-angiography-unit-for-percutaneous-pedicle-screw-placement-in-the-lumbar-spine
#14
Hiroto Kageyama, Shinichi Yoshimura, Kazutaka Uchida, Tomoko Iida
We analyzed clinical usefulness of the high resolution imaging system in a hybrid operation room (OR) for posterior lumbar interbody fusion. A total of 17 patients with lumbar spondylolisthesis between February 2014 and August 2016 were included. Multi-axis imaging system in a hybrid OR was used in 12 patients (hybrid OR group); the conventional C-arm fluoroscopy, in 5 patients (C-arm group). The time to confirm the first percutaneous pedicle screw (PPS) angle (hybrid OR, 80 vs C-arm, 249 s; P = 0.0026) and the second to the last PPS angle (77 vs 90 s; P = 0...
August 1, 2017: Neurologia Medico-chirurgica
https://www.readbyqxmd.com/read/28764720/setting-performance-based-financing-in-the-health-sector-agenda-a-case-study-in-cameroon
#15
Isidore Sieleunou, Anne-Marie Turcotte-Tremblay, Jean-Claude Taptué Fotso, Denise Magne Tamga, Habakkuk Azinyui Yumo, Estelle Kouokam, Valery Ridde
BACKGROUND: More than 30 countries in sub-Saharan Africa have introduced performance-based financing (PBF) in their healthcare systems. Yet, there has been little research on the process by which PBF was put on the national policy agenda in Africa. This study examines the policy process behind the introduction of PBF program in Cameroon. METHODS: The research is an explanatory case study using the Kingdon multiple streams framework. We conducted a document review and 25 interviews with various types of actors involved in the policy process...
August 1, 2017: Globalization and Health
https://www.readbyqxmd.com/read/28762572/promoting-effect-of-ni-oh-2-on-palladium-nanocrystals-leads-to-greatly-improved-operation-durability-for-electrocatalytic-ethanol-oxidation-in-alkaline-solution
#16
Wenjing Huang, Xian-Yin Ma, Han Wang, Renfei Feng, Jigang Zhou, Paul N Duchesne, Peng Zhang, Fengjiao Chen, Na Han, Feipeng Zhao, Junhua Zhou, Wen-Bin Cai, Yanguang Li
Most electrocatalysts for the ethanol oxidation reaction suffer from extremely limited operational durability and poor selectivity toward the CC bond cleavage. In spite of tremendous efforts over the past several decades, little progress has been made in this regard. This study reports the remarkable promoting effect of Ni(OH)2 on Pd nanocrystals for electrocatalytic ethanol oxidation reaction in alkaline solution. A hybrid electrocatalyst consisting of intimately mixed nanosized Pd particles, defective Ni(OH)2 nanoflakes, and a graphene support is prepared via a two-step solution method...
August 1, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28752760/binary-nanoparticle-graphene-hybrid-structure-based-highly-sensitive-biosensing-platform-for-norovirus-like-particle-detection
#17
Jaewook Lee, Kenshin Takemura, Chika Nozaki Kato, Tetsuro Suzuki, Enoch Y Park
Nanoparticle (NP)-decorated carbon nanotubes or graphenes (GRPs) have attracted attention because of their synergic properties such as enhanced electrical conductivity, magneto-optical effect, and plasmon resonance energy transfer. These hybrid carbon nanomaterials are widely used in sensing platforms to monitor target biomolecules, gases, and chemicals. In this study, binary nanoparticles, specifically gold (Au)/magnetic nanoparticle (MNP)-decorated graphenes (GRPs), were applied in a virus-sensing platform...
August 16, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28752545/broadband-emitting-2d-hybrid-organic-inorganic-perovskite-based-on-cyclohexane-bis-methylamonium-cation
#18
Ishita Neogi, Annalisa Bruno, Damodaran Bahulayan, Teck Wee Goh, Biplab Ghosh, Rakesh Ganguly, Daniele Cortecchia, Tze Chien Sum, Cesare Soci, Nripan Mathews, Subodh Gautam Mhaisalkar
A novel broadband emitting 2D-hybrid organic inorganic perovskite (CyBMA)PbBr4 based on highly flexible cis-1,3-bis(methylaminohydrobromide)cyclohexane (CyBMABr) core has been designed, synthesized and investigated, highlighting the effects of stereoisomerism of the templating cation on the formation and properties of the resulting perovskite. The new 2D-material has high exciton binding energy of 340 meV and a broad emission spanning from 380-750 nm, incorporating a prominent excitonic band and a less intense broad peak at room temperature...
July 28, 2017: ChemSusChem
https://www.readbyqxmd.com/read/28749374/nitrogen-doped-rgo-co3o4-nanograin-cookies-highly-porous-and-robust-catalyst-for-removing-nitrophenol-from-waste-water
#19
Erum Pervaiz, Muhammad Syam Azher Virk, Zhang Bingxue, Congling Yin, Minghui Yang
Fabrication of nanograins with uniform morphology wrapped with reduced graphene oxide (RGO) in a designed fashion is critical for obtaining large surface, high porosity and efficient catalytic ability at mild conditions. Hybrid structures of metal oxides decorated on two dimensional (2D) RGO lacked interface and channels between individual grains and RGO. Present work merely focused the synthesis of RGO wrapped Co3O4 nanograins architecture in micron sized polyhedrons and the ability of reducing aromatic nitro compounds...
July 27, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28740375/clinical-and-economic-burden-of-dyspnea-and-other-copd-symptoms-in-a-managed-care-setting
#20
Judith J Stephenson, Debra Wertz, Tao Gu, Jeetvan Patel, Anand A Dalal
PURPOSE: The degree to which symptoms such as dyspnea affect patients with COPD is individualized. To address the gap between clinical symptom measures and self-perceived disease burden, we investigated the symptom status of adult patients with COPD and followed with an administrative claims analysis of health care resource utilization and costs. METHODS: This was a hybrid US observational study consisting of a cross-sectional patient survey followed by a retrospective analysis of administrative claims data...
2017: International Journal of Chronic Obstructive Pulmonary Disease
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