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https://www.readbyqxmd.com/read/27933691/single-fusion-events-at-polarized-liquid-liquid-interfaces
#1
Eduardo Laborda, Angela Molina, Vanesa Fernández Espín, Francisco Martínez-Ortiz, José García de la Torre, Richard G Compton
A new electrochemical framework for tracking individual soft particles in solution and monitoring their fusion with polarized liquid-liquid interfaces is reported. The physicochemical principle lies in the interfacial transfer of an ionic probe confined in the particles dispersed in solution and that is released upon their collision and fusion with the fluid interface. As a proof-of-concept, spike-like transients of a stochastic nature are reported in the current-time response of 1,2-dichloroethane(DCE)|water(W) submilli-interfaces after injection of DCE-in-W emulsions...
December 9, 2016: Angewandte Chemie
https://www.readbyqxmd.com/read/27931108/caustic-esophageal-injury-by-impaction-of-cell-batteries
#2
Francisco José García Fernández, Rafael León Montañés, Juan Manuel Bozada Garcia
The ingestion of cell batteries can cause serious complications (fistula, perforation or stenosis) at the esophageal level. The damage starts soon after ingestion (approximately 2 hours) and is directly related to the amount of time the battery is lodged in said location, the amount of electrical charge remaining in the battery, and the size of the battery itself. Injury is produced by the combination of electrochemical and chemical mechanisms and pressure necrosis. The ingestion of multiple cells and a size > = 20 mm are related with more severe and clinically significant outcomes...
December 2016: Revista Española de Enfermedades Digestivas
https://www.readbyqxmd.com/read/27931001/microbial-fuel-cell-operation-using-monoazo-and-diazo-dyes-as-terminal-electron-acceptor-for-simultaneous-decolourisation-and-bioelectricity-generation
#3
Yoong-Sin Oon, Soon-An Ong, Li-Ngee Ho, Yee-Shian Wong, Yoong-Ling Oon, Harvinder Kaur Lehl, Wei-Eng Thung, Noradiba Nordin
Monoazo and diazo dyes [New coccine (NC), Acid orange 7 (AO7), Reactive red 120 (RR120) and Reactive green 19 (RG19)] were employed as electron acceptors in the abiotic cathode of microbial fuel cell. The electrons and protons generated from microbial organic oxidation at the anode which were utilized for electrochemical azo dye reduction at the cathodic chamber was successfully demonstrated. When NC was employed as the electron acceptor, the chemical oxygen demand (COD) removal and dye decolourisation efficiencies obtained at the anodic and cathodic chamber were 73±3% and 95...
November 28, 2016: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/27930883/enhancing-sodium-ion-battery-performance-by-strongly-binding-nanostructured-sb2s3-on-sulfur-doped-graphene-sheets
#4
Xunhui Xiong, Guanhua Wang, Yuwei Lin, Ying Wang, Xing Ou, Fenghua Zheng, Chenghao Yang, Jeng-Han Wang, Meilin Liu
Sodium ion batteries (SIBs) have been considered as promising alternative to lithium ion batteries (LIBs) for large-scale energy storage. However, their inferior electrochemical performances, especially cyclability become the major challenge for further development of SIBs. Large volume change and sluggish diffusion kinetics are generally considered to be responsible for the fast capacity degradation. Here we report the strong chemical bonding of nanostructured Sb2S3 on sulfur-doped graphene sheets (Sb2S3/SGS) that enables stable capacity retention of 83% for 900 cycles with high capacities and excellent rate performances...
December 8, 2016: ACS Nano
https://www.readbyqxmd.com/read/27930862/a-novel-mild-phase-transition-to-prepare-black-phosphorus-nanosheets-with-excellent-energy-applications
#5
Gang Zhao, Tailin Wang, Yongliang Shao, Yongzhong Wu, Baibiao Huang, Xiaopeng Hao
Based on the phase transformation of phosphorus and Gibbs free energy theory, a new mild method to fabricate black phosphorus nanosheets from their red phosphorus microsphere counterparts is proposed. Interestingly, the as-prepared black phosphorus nanosheets, as a kind of novel metal-free photocatalyst, exhibit excellent photocatalytic H2 production performance owing to their intrinsic layered polycrystalline structure. Besides, the nanosheet is also a kind of potential anode material in lithium-ion batteries and shows good electrochemical performance...
December 8, 2016: Small
https://www.readbyqxmd.com/read/27930456/effects-of-a-modified-vitrectomy-probe-in-small-gauge-vitrectomy-an-experimental-study-on-the-flow-and-on-the-traction-exerted-on-the-retina
#6
Stanislao Rizzo, Gualtiero Fantoni, Giovanni de Santis, Jaw-Chyng Lormen Lue, Jonathan Ciampi, Michele Palla, Federica Genovesi Ebert, Alfonso Savastano, Carmelo De Maria, Giovanni Vozzi, Rodrigo A Brant Fernandes, Francesco Faraldi, Giuseppe Criscenti
PURPOSE: Thorough this experimental study, the physic features of a modified 23-gauge vitrectomy probe were evaluated in vitro. METHODS: A modified vitrectomy probe to increase vitreous outflow rate with a small-diameter probe, that also minimized tractional forces on the retina, was created and tested. The "new" probe was created by drilling an opening into the inner duct of a traditional 23-gauge probe with electrochemical or electrodischarge micromachining. Both vitreous outflow and tractional forces on the retina were examined using experimental models of vitreous surgery...
December 7, 2016: Retina
https://www.readbyqxmd.com/read/27929587/highly-efficient-electrochemiluminescence-based-on-4-amino-1-2-4-triazole-schiff-base-two-dimensional-zn-cd-coordination-polymers
#7
Shu-Hua Zhang, Ji-Ming Wang, Hai-Yang Zhang, Yi-Peng Fan, Yu Xiao
Four coordination polymers, formulated as [Zn(L(1))2]n (1), [Cd(L(1))2]n (2), [Zn(L(2))2]n (3) and [Cd(L(2))2]n (4) (HL1 is (E)-2-(((4H-1,2,4-triazol-4-yl)imino)methyl)-4,6-dibromophenol; HL2 is (E)-2-(((4H-1,2,4-triazol-4-yl)imino)methyl)-4,6-dichlorophenol) have been synthesized through vial reactions. The four compounds were structurally characterized by single crystal X-ray diffraction, elemental analysis, PXRD, and fluorescence spectroscopy. For 1-4, a detailed analysis of Hirshfeld surfaces and fingerprint plots facilitates a comparison of intermolecular interactions, which are crucial in building different supramolecular architectures...
December 8, 2016: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/27929488/production-and-quality-control-177lu-nca-dotmp-as-a-potential-agent-for-bone-pain-palliation
#8
Nafise Salek, Mojtaba Shamsaei, Mohammad Ghannadi Maragheh, Simindokht Shirvani Arani, Ali Bahrami Samani
Skeletal uptake of radiolabeled-1, 4, 7, 10-tetraazacyclododecane-1, 4, 7, 10-tetramethylene phosphoric acid (e.g., 177Lu-DOTMP) complex, is used for bone pain palliation. The moderate energy of β-emitting 177Lu (T½ = 6.7 d, Eβmax = 497keV) has been considered as a potential radionuclide for development of the bone-seeking radiopharmaceutical. Since the specific activity of the radiolabeled carrier molecules should be high, the "no-carrier-added radionuclides" have sig-nificant roles in nuclear medicine...
November 8, 2016: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/27929194/robust-electrochemical-metal-oxide-deposition-using-an-electrode-with-a-superhydrophobic-surface
#9
Jun Zhang, Xia Sheng, Xiqing Cheng, Liping Chen, Jian Jin, Xinjian Feng
Described herein is the first study of metal oxide deposition on an electrode with a solid/liquid/gas triphase reaction interface. Such an electrode enables the formation of a locally high interface pH value that is independent of the bulk conditions, and allows the deposition of a wide variety of metal oxides in a robust electrolyte. The results reveal that the control of electrode surface wettability is of significant importance for the regulation of the electrode-electrolyte local interface environment, which provides a new set of guidelines and perspective for future electrode preparation and application...
December 8, 2016: Nanoscale
https://www.readbyqxmd.com/read/27929125/totally-embedded-hybrid-thin-films-of-carbon-nanotubes-and-silver-nanowires-as-flat-homogenous-flexible-transparent-conductors
#10
Suresh Kumar Raman Pillai, Jing Wang, Yilei Wang, Md Moniruzzaman Sk, Ari Bimo Prakoso, Rusli, Mary B Chan-Park
There is a great need for viable alternatives to today's transparent conductive film using largely indium tin oxide. We report the fabrication of a new type of flexible transparent conductive film using silver nanowires (AgNW) and single-walled carbon nanotube (SWCNT) networks which are fully embedded in a UV curable resin substrate. The hybrid SWCNTs-AgNWs film is relatively flat so that the RMS roughness of the top surface of the film is 3 nm. Addition of SWCNTs networks make the film resistance uniform; without SWCNTs, sheet resistance of the surface composed of just AgNWs in resin varies from 20 Ω/sq to 10(7 )Ω/sq...
December 8, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27928613/evaluation-of-the-antibacterial-activity-of-a-cationic-polymer-in-aqueous-solution-with-a-convenient-electrochemical-method
#11
Yihong Wang, Qing Guo, Huafu Wang, Kun Qian, Liang Tian, Chen Yao, Wei Song, Weixia Shu, Ping Chen, Jinxu Qi
Quaternized chitosan is a cationic biopolymer with good antibacterial activity, biocompatibility, and biodegradability, and it has been widely applied in many fields. We have developed a convenient method to evaluate the antibacterial activity of hydroxypropyltrimethylammonium chloride chitosan (HACC) with a nonionic surfactant poloxamer in aqueous solution by monitoring the change of the oxidation peak current in cyclic voltammetry. Increasing values of the oxidation peak current were positively correlated with the antibacterial activity of HACC-poloxamer solutions...
December 7, 2016: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/27928570/photochemical-and-computational-studies-of-inclusion-complexes-between-%C3%AE-cyclodextrin-and-1-2-dihydroxyanthraquinones
#12
Sonaimuthu Mohandoss, Thambusamy Stalin
The formation of an inclusion complex between 1,2-dihydroxyanthraquinones (1,2-DHAQ) and β-cyclodextrin (β-CD) has been studied by UV-visible, fluorescence spectroscopy and electrochemical methods. The stoichiometric ratio of the inclusion complex was found to be 1 : 1 and the binding constant was evaluated using the Benesi-Hildebrand equation. The peak currents (Ipa and Ipc) change drastically with increasing β-CD concentration and the peak potentials (Epa and Epc) shifted. A mechanism is proposed to explain the inclusion process...
December 8, 2016: Photochemical & Photobiological Sciences
https://www.readbyqxmd.com/read/27927915/comparative-evaluation-of-four-phenotypic-tests-for-the-detection-of-carbapenemase-producing-gram-negative-bacteria
#13
Audrey Noël, Te-Din Huang, Catherine Berhin, Martin Hoebeke, Warda Bouchahrouf, Sami Yunus, Pierre Bogaerts, Youri Glupczynski
Four screening assays aimed for rapid detection of carbapenemase production from Gram-negative bacterial isolates i.e. the Neo-Rapid CARB kit (Rosco Diagnostica A/S), the RAPIDEC CARBA NP test (BioMérieux SA), the β CARBA test (Bio-Rad Laboratories N.V) and a home-made electrochemical assay (BYG Carba test) were evaluated against a panel comprising 328 clinical isolates (Enterobacteriaceae [n= 198], nonfermentative Gram-negative bacilli [n = 130]) with previously characterized resistance mechanisms to carbapenems...
December 7, 2016: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/27927876/operando-observations-of-solid-state-electrochemical-reactions-in-li-ion-batteries-by-spatially-resolved-tem-eels-and-electron-holography
#14
Kazuo Yamamoto, Yasutoshi Iriyama, Tsukasa Hirayama
No abstract text is available yet for this article.
December 6, 2016: Microscopy
https://www.readbyqxmd.com/read/27925584/topological-analysis-and-gaussian-decision-tree-effective-representation-and-classification-of-biosignals-of-small-sample-size
#15
Zhifei Zhang, Yang Song, Haochen Cui, Jayne Wu, Fernando Schwartz, Hairong Qi
GOAL: Bucking the trend of big data, in microdevice engineering, small sample size is common, especially when the device is still at the proof-of-concept stage. The small sample size, small inter-class variation, and large intra-class variation, have brought biosignal analysis new challenges. Novel representation and classification approaches need to be developed to effectively recognize targets of interests with the absence of a large training set. METHODS: Moving away from the traditional signal analysis in the spatiotemporal domain, we exploit the biosignal representation in the topological domain that would reveal the intrinsic structure of point clouds generated from the biosignal...
December 2, 2016: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/27925508/%C3%AE-cyclodextrin-carbon-nanotube-enhanced-sensor-for-ciprofloxacin-detection
#16
Jorge M P J Garrido, Manuel Melle-Franco, Karol Strutyński, Fernanda Borges, Christopher M A Brett, E Manuela P J Garrido
A simple and expedite electrochemical methodology was developed for the determination of ciprofloxacin, based on a glassy carbon (GC) electrode modified by a combination of multi-walled carbon nanotubes (MWCNT) with β-cyclodextrin (β-CD) incorporated in a polyaniline film. The combined use of β-CD and MWCNT in the electrochemical sensor leads to a significant signal improvement. The β-CD/MWCNT modified GC electrode exhibited efficient electrocatalytic behavior in the oxidation of ciprofloxacin with relatively high sensitivity, stability and lifetime...
December 7, 2016: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/27925418/white-light-emitting-carbon-dots-prepared-by-the-electrochemical-exfoliation-of-graphite
#17
Aji A Anappara, Julin Joseph
Here we report single-step synthesis of white-light emitting carbon dots (CDs) through a green, facile and cheap electrochemical route using graphite rods as the carbon source. Under UV-excitation, the aqueous dispersion of as-synthesized CDs exhibited broad-band emission which covers a significant fraction of visible spectrum; owing to the heterogeneity in the particle-size and surface-functional groups. The CDs were further explored for their potential as UV-to-visible color-convertor under remote-phosphor technology by capping a 365 nm UV-LED chip with CDs-loaded PMMA to obtain color parameters: CIE (0...
December 7, 2016: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
https://www.readbyqxmd.com/read/27925413/mechanism-of-water-oxidation-catalysed-by-a-mononuclear-manganese-complex-py2n-tbu-2mn-h2o-2-2
#18
Yingying Li, Ke Ye, Per E M Siegbahn, Rong-Zhen Liao
The design and synthesis of biomimetic Mn complexes to catalyze oxygen evolution is a very appealing goal since water oxidation in nature employs manganese. A mononuclear Mn complex 1 [LMnII(H2O)2]2+ (L=Py2N(tBu)2) was recently reported to catalyze water oxidation electrochemically with an applied potential of 1.23 V at pH=12.2 in aqueous solution. Density functional calculations have here been performed to elucidate the mechanism of water oxidation promoted by this catalyst. The calculations showed that 1 can readily lose two protons and one electron with the production of 2 [LMnIII(OH)2]+, which then undergoes two sequential proton-coupled electron transfer processes to afford 4 [LMnVOO]+...
December 7, 2016: ChemSusChem
https://www.readbyqxmd.com/read/27925412/in-situ-raman-spectroscopic-studies-on-concentration-of-electrolyte-salt-in-lithium-ion-batteries-by-using-ultrafine-multi-fiber-probes
#19
Toshiro Yamanaka, Hiroe Nakagawa, Shigetaka Tsubouchi, Yasuhiro Domi, Takayuki Doi, Takeshi Abe, Zempachi Ogumi
Lithium ion batteries have attracted considerable attention due to their high power density. The change in concentration of salt in the electrolyte solution in lithium ion batteries during operation causes serious degradation of battery performance. In this work, a new method of in situ Raman spectroscopy using ultrafine multi-fiber probes was developed to simultaneously study the concentrations of ions at several different positions in the electrolyte solution in deep narrow spaces between the electrodes in batteries...
December 7, 2016: ChemSusChem
https://www.readbyqxmd.com/read/27925360/hierarchical-mesoporous-sno2-nanosheets-on-carbon-cloth-a-robust-and-flexible-electrocatalyst-for-co2-reduction-with-high-efficiency-and-selectivity
#20
Fengwang Li, Lu Chen, Gregory P Knowles, Douglas R MacFarlane, Jie Zhang
Electrochemical reduction of CO2 into liquid fuels is a promising approach to achieve a carbon-neutral energy cycle. However, conventional electrocatalysts usually suffer from low energy efficiency and poor selectivity and stability. A 3D hierarchical structure composed of mesoporous SnO2 nanosheets on carbon cloth is proposed to efficiently and selectively electroreduce CO2 to formate in aqueous media. The electrode is fabricated by a facile combination of hydrothermal reaction and calcination. It exhibits an unprecedented partial current density of about 45 mA cm(-2) at a moderate overpotential (0...
December 7, 2016: Angewandte Chemie
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