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https://www.readbyqxmd.com/read/28228003/electrochemical-formation-of-multilayer-sno2-sb-x-o-y-coating-in-complex-electrolyte
#1
Antonina Maizelis, Boris Bairachniy
The multilayer antimony-doped tin dioxide coating was obtained by cathodic deposition of multilayer metal-hydroxide coating with near 100-nm thickness layers on the alloy underlayer accompanied by the anodic oxidation of this coating. The potential regions of deposition of tin, antimony, tin-antimony alloy, and mixture of this metals and their hydroxides in the pyrophosphate-tartrate electrolyte were revealed by the cyclic voltammetric method. The possibility of oxidation of cathodic deposit consisting of tin and Sn(II) hydroxide compounds to the hydrated tin dioxide in the same electrolyte was demonstrated...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28226943/using-liquid-metal-alloy-egain-to-electrochemically-enhance-ss-stimulation-electrodes-for-biobotic-applications
#2
Tahmid Latif, Fengyuan Gong, Michael Dickey, Mihail Sichitiu, Alper Bozkurt, Tahmid Latif, Fengyuan Gong, Michael Dickey, Mihail Sichitiu, Alper Bozkurt, Michael Dickey, Tahmid Latif, Fengyuan Gong, Alper Bozkurt, Mihail Sichitiu
Biobotics is an emerging and useful advent in the field of robotics which harnesses the mechanical power of live invertebrates and benefits from them as "working" animals. Most biobotic applications rely on neural or muscular stimulation through implanted electrodes for achieving direct control of their locomotory behavior. Degradation of stimulation efficiency is often noticed through extended usage, partly owing to incompatibility of implanted electrodes to the application. Our previous achievements in biobotics utilized commercially available stainless steel wires as stimulation electrodes due to its availability and lower cost...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226926/electrode-electrolyte-interface-model-of-tripolar-concentric-ring-electrode-and-electrode-paste
#3
Seyed Hadi Nasrollaholhosseini, Preston Steele, Walter G Besio, Seyed Hadi Nasrollaholhosseini, Preston Steele, Walter G Besio, Seyed Hadi Nasrollaholhosseini, Walter G Besio, Preston Steele
Electrodes are used to transform ionic currents to electrical currents in biological systems. Modeling the electrode-electrolyte interface could help to optimize the performance of the electrode interface to achieve higher signal to noise ratios. There are previous reports of accurate models for single-element biomedical electrodes. In this paper we develop a model for the electrode-electrolyte interface for tripolar concentric ring electrodes (TCRE) that are used to record brain signals.
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226901/investigations-on-different-epoxies-for-electrical-insulation-of-microflex-structures
#4
P Cvancara, S Lauser, L Rudmann, T Stieglitz, P Cvancara, S Lauser, L Rudmann, T Stieglitz, P Cvancara, S Lauser, T Stieglitz, L Rudmann
The microflex interconnection (MFI) technique is often used to connect electrically and mechanically thin film ribbons or electrodes with a solid substrate like screen printed ceramics. For stabilization reasons epoxy is used to fix the MFI structure. As epoxy tends to form cracks when surrounded by water or electrolytes we are eager to find an epoxy which provides sufficient insulation between the single channels of the MFI structure also in a moist surrounding. Therefore we designed a device to investigate the insulating properties of different epoxies (Uhu Plus Endfest 300, Epo-Tek 353ND and 353ND-T) immersed in saline solution...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226896/evaluation-of-biofouling-for-implantable-micro-dialysis-system
#5
T Ota, N To, Y Kanno, N Miki, T Ota, N To, Y Kanno, N Miki, T Ota, Y Kanno, N Miki, N To
Implantable artificial kidney can drastically improve the quality of life of the renal disease patients. In previous study, our group has developed a multi-layered micro dialysis device which is composed of micro stainless steel channels and nano-porous polyethersulfone (PES) membranes. The device conducts hemofiltration without dialysis fluids, which is advantageous in miniaturization. We investigated the water-permeability of the PES membrane through in vivo experiments using rat model of renal disease for 5 hours and verified the effectiveness of the device...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28225808/epileptogenesis-in-organotypic-hippocampal-cultures-has-limited-dependence-on-culture-medium-composition
#6
Jing Liu, Yero Saponjian, Mark M Mahoney, Kevin J Staley, Yevgeny Berdichevsky
Rodent organotypic hippocampal cultures spontaneously develop epileptiform activity after approximately 2 weeks in vitro and are increasingly used as a model of chronic post-traumatic epilepsy. However, organotypic cultures are maintained in an artificial environment (culture medium), which contains electrolytes, glucose, amino acids and other components that are not present at the same concentrations in cerebrospinal fluid (CSF). Therefore, it is possible that epileptogenesis in organotypic cultures is driven by these components...
2017: PloS One
https://www.readbyqxmd.com/read/28225599/cubic-sr2scgao5-perovskite-structural-stability-oxygen-defect-structure-and-ion-conductivity-explored-on-single-crystals
#7
Serena Corallini, Monica Ceretti, Alain Cousson, Clemens Ritter, Marco Longhin, Philippe Papet, Werner Paulus
Oxygen-deficient Sr2ScGaO5 single crystals with a cubic perovskite structure were grown by the floating-zone technique. The transparent crystals of this pure 3D oxygen electrolyte are metastable at ambient temperature, showing one-sixth of all oxygen positions vacant. While neutron single-crystal diffraction, followed by maximum entropy analysis, revealed a strong anharmonic displacements for the oxygen atoms, a predominant formation of ScO6 octahedra and GaO4 tetrahedra is indicated by Raman spectroscopic studies, resulting in a complex oxygen defect structure with short-range order...
February 22, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28225342/outcomes-from-the-first-multidrug-resistant-tuberculosis-programme-in-kenya
#8
H Huerga, M Bastard, M Kamene, S Wanjala, A Arnold, N Oucho, I Chikwanha, F Varaine
SETTING: In March 2006, the first multidrug-resistant tuberculosis (MDR-TB) treatment programme was implemented in Kenya. OBJECTIVE: To describe patients' treatment outcomes and adverse events. DESIGN: A retrospective case note review of patients started on MDR-TB treatment at two Médecins Sans Frontières-supported sites and the national referral hospital of Kenya was undertaken. Sites operated an ambulatory model of care. Patients were treated for a minimum of 24 months with at least 4-5 drugs for the intensive phase of treatment, including an injectable agent...
March 1, 2017: International Journal of Tuberculosis and Lung Disease
https://www.readbyqxmd.com/read/28225278/electrochemical-stripping-of-atomic-oxygen-on-single-crystalline-platinum-bridging-gas-phase-and-electrochemical-oxidation
#9
Yi-Fan Huang, Marc T M Koper
In order to understand the interaction between Pt and surface oxygenated species in electrocatalysis, this paper correlates the electrochemistry of atomic oxygen on Pt formed in the gas phase with electrochemically generated oxygen species, on a variety of single-crystal platinum surfaces. The atomic oxygen adsorbed on single crystalline Pt electrodes, made by thermal dissociation of molecular oxygen, are used for voltammetry measurements in acidic electrolytes (HClO4 and H2SO4). The essential knowledge of coverage, binding energy and surface construction of atomic oxygen is correlated with the charge, potential and shape of voltammograms, respectively...
February 22, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/28224884/water-soluble-co-polyelectrolytes-by-selective-modification-of-cellulose-esters
#10
Shu Liu, Kevin J Edgar
Cellulose-based materials are well-suited for biomedical uses, because of their abundance, renewable nature, biodegradability, and relatively low cost. However, the set of commercially available cellulose esters and ethers is limited in number and diversity, and contains no cationically charged cellulose esters. Herein we report a simple, efficient strategy for synthesizing cationic, water-soluble co-polyelectrolytes from commercial, hydrophobic, renewable-based cellulose esters. Cellulose acetate (degree of substitution (DS) 1...
April 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28224685/bubble-sheet-like-interface-design-with-an-ultrastable-solid-electrolyte-layer-for-high-performance-dual-ion-batteries
#11
Panpan Qin, Meng Wang, Na Li, Haili Zhu, Xuan Ding, Yongbing Tang
In this work, a bubble-sheet-like hollow interface design on Al foil anode to improve the cycling stability and rate performance of aluminum anode based dual-ion battery is reported, in which, a carbon-coated hollow aluminum anode is used as both anode materials and current collector. This anode structure can guide the alloying position inside the hollow nanospheres, and also confine the alloy sizes within the hollow nanospheres, resulting in significantly restricted volumetric expansion and ultrastable solid electrolyte interface (SEI)...
February 22, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28224683/confined-amorphous-red-phosphorus-in-mof-derived-n-doped-microporous-carbon-as-a-superior-anode-for-sodium-ion-battery
#12
Weihan Li, Shuhe Hu, Xiangyu Luo, Zhongling Li, Xizhen Sun, Minsi Li, Fanfan Liu, Yan Yu
Red phosphorus (P) has attracted intense attention as promising anode material for high-energy density sodium-ion batteries (NIBs), owing to its high sodium storage theoretical capacity (2595 mAh g(-1) ). Nevertheless, natural insulating property and large volume variation of red P during cycling result in extremely low electrochemical activity, leading to poor electrochemical performance. Herein, the authors demonstrate a rational strategy to improve sodium storage performance of red P by confining nanosized amorphous red P into zeolitic imidazolate framework-8 (ZIF-8) -derived nitrogen-doped microporous carbon matrix (denoted as P@N-MPC)...
February 22, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28224420/early-osseointegration-of-implants-with-cortex-like-tio2-coatings-formed-by-micro-arc-oxidation-a-histomorphometric-study-in-rabbits
#13
Hong-Zhi Zhou, Ya-da Li, Lin Liu, Xiao-Dong Chen, Wei-Qiang Wang, Guo-Wu Ma, Yu-Cheng Su, Min Qi, Bin Shi
In our previous studies, a novel cortex-like TiO2 coating was prepared on Ti surface through micro-arc oxidation (MAO) by using sodium tetraborate as electrolyte, and the effects of the coating on cell attachment were testified. This study aimed to investigate the effects of this cortex-like MAO coating on osseointegration. A sand-blasting and acid-etching (SLA) coating that has been widely used in clinical practice served as control. Topographical and chemical characterizations were conducted by scanning electron microscopy, energy dispersive X-ray spectrometer, X-ray diffraction, contact angle meter, and step profiler...
February 2017: Journal of Huazhong University of Science and Technology. Medical Sciences
https://www.readbyqxmd.com/read/28224192/serum-magnesium-and-the-risk-of-prediabetes-a-population-based-cohort-study
#14
Brenda C T Kieboom, Symen Ligthart, Abbas Dehghan, Steef Kurstjens, Jeroen H F de Baaij, Oscar H Franco, Albert Hofman, Robert Zietse, Bruno H Stricker, Ewout J Hoorn
AIMS/HYPOTHESIS: Previous studies have found an association between serum magnesium and incident diabetes; however, this association may be due to reverse causation, whereby diabetes may induce urinary magnesium loss. In contrast, in prediabetes (defined as impaired fasting glucose), serum glucose levels are below the threshold for urinary magnesium wasting and, hence, unlikely to influence serum magnesium levels. Thus, to study the directionality of the association between serum magnesium levels and diabetes, we investigated its association with prediabetes...
February 21, 2017: Diabetologia
https://www.readbyqxmd.com/read/28224144/facile-synthesis-of-3d-porous-co3v2o8-nanoroses-and-2d-nico2v2o8-nanoplates-for-high-performance-supercapacitors-and-their-electrocatalytic-oxygen-evolution-reaction-properties
#15
Jingchao Zhang, Baiqing Yuan, Shufang Cui, Nana Zhang, Jingjing Wei, Xiao Wang, Daojun Zhang, Renchun Zhang, Qisheng Huo
Binary metal oxides have recently attracted extensive attention from researchers in the energy storage and conversion field due to their high energy densities and multiple oxidation states. Novel 3D Co3V2O8 porous rose-like structures and 2D NiCo2V2O8 nanoplates were facilely synthesized via a solvothermal method, and the morphologies, Ni/Co ratios, and surface area of these samples can be easily tuned in the same procedure. The as-prepared Co3V2O8 porous rose-like structure exhibited good electrocatalytic oxygen evolution performance with excellent activity and stability...
February 22, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28224001/overexpression-of-prunus-mume-dehydrin-genes-in-tobacco-enhances-tolerance-to-cold-and-drought
#16
Fei Bao, Dongliang Du, Yang An, Weiru Yang, Jia Wang, Tangren Cheng, Qixiang Zhang
Dehydrins, known as group 2 or D-11 family late-embryogenesis-abundant (LEA) proteins, play important roles in plant growth and stress tolerance. Six dehydrin genes were previously identified from the genome of Prunus mume. In this study, five of them (PmLEA8, PmLEA10, PmLEA19, PmLEA20, and PmLEA29) were cloned from cold-resistant P. mume 'Beijingyudie'. Real-time RT-PCR analysis indicated that all these genes could be up-regulated by one or several treatments (ABA, SA, low temperature, high temperature, PEG, and NaCl treatments)...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28222988/thirty-day-and-90-day-hospital-readmission-after-outpatient-upper-extremity-hemodialysis-access-creation
#17
Jeffrey J Siracuse, Nishant K Shah, Matthew R Peacock, Georges Tahhan, Jeffrey A Kalish, Denis Rybin, Mohammad H Eslami, Alik Farber
OBJECTIVE: Patients with end-stage renal disease have multiple comorbidities and are at increased risk for postoperative complications and resource utilization. Our goal was to determine the rate and causes of 30-day and 90-day hospital readmissions after the creation of outpatient hemodialysis access. METHODS: We retrospectively reviewed all outpatient upper extremity hemodialysis access creations performed at our medical center from 2008 to 2015. Readmission was defined as any inpatient status admission ≤30 and 90 days...
February 17, 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/28222929/magnesium-an-overlooked-electrolyte
#18
Jaya Kala, Ala Abudayyeh
BACKGROUND: Hypermagnesemia is rare and usually iatrogenic. Due to decreased renal function, older patients are generally more susceptible to hypermagnesemia than are younger patients. Because it is not one of the commonly assessed electrolytes in the blood work panel of patients, high levels are usually missed. CASE REPORT: An elderly gentleman with history of leukemia presented with complaints of shortness of breath and extreme weakness while walking. He was diagnosed with severe hypermagnesemia, but unfortunately succumbed to cardiorespiratory arrest...
February 17, 2017: Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28222859/determination-of-benzimidazoles-in-meat-samples-by-capillary-zone-electrophoresis-tandem-mass-spectrometry-following-dispersive-liquid-liquid-microextraction
#19
Carmen Tejada-Casado, David Moreno-González, Francisco J Lara, Ana M García-Campaña, Monsalud Del Olmo-Iruela
A novel method based on capillary zone electrophoresis-tandem mass spectrometry has been proposed and validated for the identification and simultaneous quantification of twelve benzimidazoles in meat samples. Electrophoretic separation was carried out using 500mM formic acid (pH 2.2) as background electrolyte and applying a voltage of 25kV at 25°C. In order to improve the sensitivity, stacking mode injection was applied, using as injection solvent a mixture of 30:70 acetonitrile/water at 50mbar for 75s. Sensitivity enhancement factors from 74 to 317 were obtained under these conditions...
February 14, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28222581/a-comparison-of-the-physiological-demands-imposed-by-competing-in-a-half-marathon-vs-a-marathon
#20
Juan Del Coso, Juan J Salinero, Beatriz Lara, Javier Abián-Vicén, César Gallo-Salazar, Francisco Areces
BACKGROUND: While there is widespread scientific information about the physiological challenges imposed on elite endurance runners during competitions, the information regarding the amateur population is scarce. The aim of this study was to compare the physical and physiological load imposed by competing in a real half-marathon vs a marathon race. METHODS: From a larger group of participants, we selected 22 experienced runners who were matched in pairs (11 marathoners and 11 half-marathoners) for age and anthropometric data...
February 21, 2017: Journal of Sports Medicine and Physical Fitness
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