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https://www.readbyqxmd.com/read/28340523/nanostructured-co-mn-3o4-for-high-capacitive-supercapacitor-applications
#1
Qinghua Tian, Xiang Wang, Guoyong Huang, Xueyi Guo
Nanostructured Co doped Mn3O4 spinel structure ((Co, Mn)3O4) were prepared by co-precipitation under O3 oxidizing conditions and post-heat treatment. The product was composed of nanogranules with a diameter of 20-60 nm. The electrochemical performance of (Co, Mn)3O4 electrode was tested by cyclic voltammetry, impedance, and galvanostatic charge-discharge measurements. A maximum specific capacitance value of 2701.0 F g(-1) at a current density of 5 A g(-1) could be obtained within the potential range from 0...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28340299/bifurcation-of-regeneration-and-recombination-in-dye-sensitized-solar-cells-via-electronic-manipulation-of-tandem-cobalt-redox-shuttles
#2
Josh Baillargeon, Yuling Xie, Thomas W Hamann
A cobalt(IV/III) redox shuttle, cobalt tris(2-(p-tolyl)pyridine), [Co(ptpy)3]+/0, was synthesized and investigated for use in dye-sensitized solar cells, DSSCs. An incredibly fast self-exchange rate constant of (9.2  3.9) × 108 M-1s-1 was determined for [Co(ptpy)3]+/0, making it an ideal candidate for dye regeneration. To avoid fast recombination and solubility limitations, a tandem electrolyte containing [Co(ptpy)3]+/0 and cobalt tris(2,2'-bipyridine), [Co(bpy)3]3+/2+, was utilized. An improved short circuit current density is achieved for DSSCs employing the tandem electrolyte, compared to electrolytes containing only [Co(bpy)3]3+/2+, consistent with superior dye regeneration expected based on predictions using Marcus Theory, which is also discussed...
March 24, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28340297/atomic-scale-snapshots-of-the-formation-and-growth-of-hollow-ptni-c-nanocatalysts
#3
Raphael Chattot, Tristan Asset, Jakub Drnec, Pierre Bordet, Jaysen Nelayah, Laetitia Dubau, Frédéric Maillard
Determining the formation and growth mechanism of bimetallic nanoparticles (NPs) with atomic detail is fundamental to synthesize efficient 'catalysts by design'. However, the understanding of the elementary steps, which take place during their synthesis remains elusive. Herein, we have exploited scanning transmission electron microscopy coupled to energy dispersive X-ray spectroscopy, operando wide angle and small angle X-ray scattering and electrochemistry to unveil the formation and growth mechanism of hollow PtNi/C NPs...
March 24, 2017: Nano Letters
https://www.readbyqxmd.com/read/28339935/nephrotoxicity-of-anticancer-treatment
#4
Jolanta Malyszko, Klaudia Kozlowska, Leszek Kozlowski, Jacek Malyszko
Severe adverse systemic drug events occur commonly as a result of treatment of cancer patients. Nephrotoxicity of chemotherapeutic agents remains a significant complication limiting the efficacy of the treatment. A variety of renal disease and electrolyte disorders can result from the drugs that are used to treat malignant disease. The kidneys are a major elimination pathway for many antineoplastic drugs and their metabolites. Tumour lysis syndrome, an emergency in haematooncology, occurs most often after the initiation of cytotoxic therapy in patients with high-grade lymphomas and acute lymphoblastic leukaemia...
October 6, 2016: Nephrology, Dialysis, Transplantation
https://www.readbyqxmd.com/read/28339813/microstructural-observation-of-fuel-cell-catalyst-inks-by-cryo-sem-and-cryo-tem
#5
Junichi Shimanuki, Shinichi Takahashi, Hajime Tohma, Atsushi Ohma, Ayumi Ishihara, Yoshiko Ito, Yuri Nishino, Atsuo Miyazawa
In order to improve the electricity generation performance of fuel cell electric vehicles, it is necessary to optimize the microstructure of the catalyst layer of a polymer electrolyte fuel cell. The catalyst layer is formed by a wet coating process using catalyst inks. Therefore, it is very important to observe the microstructure of the catalyst ink. In this study, the morphology of carbon-supported platinum (Pt/C) particles in catalyst inks with a different solvent composition was investigated by cryogenic scanning electron microscopy (cryo-SEM)...
February 9, 2017: Microscopy
https://www.readbyqxmd.com/read/28339780/adverse-kidney-effects-of-epidermal-growth-factor-receptor-inhibitors
#6
Hassan Izzedine, Mark A Perazella
The epidermal growth factor receptor (EGFR) is implicated in various malignancies. The past decade has seen the development and widespread use of EGFR inhibitors for the successful treatment of such cancers. Available EGFR inhibitors include small molecule tyrosine-kinase inhibitors and monoclonal antibodies. Class-related renal adverse events result in dual toxicity including tubular/electrolyte disorders and glomerulopathies. Tubular injury is common and mainly due to monoclonal antibodies while glomerulopathy is rare and related to various anti-EGFR agents...
February 23, 2017: Nephrology, Dialysis, Transplantation
https://www.readbyqxmd.com/read/28339702/subclinical-chronic-left-ventricular-systolic-dysfunction-resulting-from-phosphine-poisoning
#7
E Szymczyk, M Wiszniewska, J Walusiak-Skorupa, J D Kasprzak, P Lipiec
We present a case of a 32-year-old male crew member of a cargo ship, accidentally exposed to phosphine, a fumigating substance. He and other crew members developed increasing fatigue and digestive disorders 24 h later; two died from acute pulmonary oedema. The patient was admitted to hospital, where bilateral pneumonia, acute nephritis, hepatopathy, electrolyte imbalance and leucopenia were diagnosed. He was discharged from hospital 3 weeks later. He was examined 4 months later for possible chronic consequences of acute phosphine poisoning, which included echocardiography showing normal heart size and cardiac function...
February 21, 2017: Occupational Medicine
https://www.readbyqxmd.com/read/28339226/percolation-via-combined-electrostatic-and-chemical-doping-in-complex-oxide-films
#8
Peter P Orth, Rafael M Fernandes, Jeff Walter, C Leighton, B I Shklovskii
Stimulated by experimental advances in electrolyte gating methods, we investigate theoretically percolation in thin films of inhomogeneous complex oxides, such as La_{1-x}Sr_{x}CoO_{3} (LSCO), induced by a combination of bulk chemical and surface electrostatic doping. Using numerical and analytical methods, we identify two mechanisms that describe how bulk dopants reduce the amount of electrostatic surface charge required to reach percolation: (i) bulk-assisted surface percolation and (ii) surface-assisted bulk percolation...
March 10, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28338609/ectopic-expression-of-aeluropus-littoralis-plasma-membrane-protein-gene-altmp1-confers-abiotic-stress-tolerance-in-transgenic-tobacco-by-improving-water-status-and-cation-homeostasis
#9
Walid Ben Romdhane, Rania Ben-Saad, Donaldo Meynard, Jean-Luc Verdeil, Jalel Azaza, Nabil Zouari, Lotfi Fki, Emmanuel Guiderdoni, Abdullah Al-Doss, Afif Hassairi
We report here the isolation and functional analysis of AlTMP1 gene encoding a member of the PMP3 protein family. In Aeluropus littoralis, AlTMP1 is highly induced by abscisic acid (ABA), cold, salt, and osmotic stresses. Transgenic tobacco expressing AlTMP1 exhibited enhanced tolerance to salt, osmotic, H₂O₂, heat and freezing stresses at the seedling stage. Under greenhouse conditions, the transgenic plants showed a higher level of tolerance to drought than to salinity. Noteworthy, AlTMP1 plants yielded two- and five-fold more seeds than non-transgenic plants (NT) under salt and drought stresses, respectively...
March 24, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28338570/a-case-of-all-developing-posterior-reversible-encephalopathy-secondary-to-hyponatremia
#10
Nilgun Eroglu, Aysenur Bahadir, Erol Erduran
Posterior reversible encephalopathy syndrome (PRES), may be due to different causes. It may develop secondary to hypertension, renal decompensation, electrolyte imbalance, and chemotherapeutic drugs. We describe a case of acute lymphoblastic leukemia in which PRES developed secondary to hyponatremia despite being normotensive during receipt of chemotherapy. Magnetic resonance imaging findings were suggestive of PRES. Partial diffusion restriction was observed in lesions in the bilateral occipitoparietal regions and the cerebellum...
March 23, 2017: Journal of Pediatric Hematology/oncology
https://www.readbyqxmd.com/read/28338477/osmotic-and-hemodynamic-effects-of-hypertonic-glucose-during-hemodialysis
#11
Daniel Schneditz, Stanisław Niemczyk, Notburga Sauseng, Isolde Bachler, Edda Zierler, Helmut Karl Lackner, Hildegard Hafner-Giessauf
It was the purpose to quantify the hemodynamic effects of a bolus of hypertonic glucose injected into the extracorporeal system in a group of stable and non-diabetic patients during hemodialysis (HD).Glucose and electrolytes were measured in frequent intervals. Arterial blood pressures and heart rates were continuously recorded by non-invasive vascular unloading technique. Beat-to-beat stroke volume, cardiac output, and total peripheral resistance were determined by Modelflow method. Relative blood volumes were continuously measured by ultrasonic and optical means...
March 22, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/28338316/quantitative-characterization-of-the-surface-evolution-for-lini0-5co0-2mn0-3o2-graphite-cell-during-long-term-cycling
#12
Huiyuan Zheng, Qunting Qu, Guobin Zhu, Gao Liu, Vincent S Battaglia, Honghe Zheng
Many factors have been proposed explaining the capacity degradation mechanisms of LiNixCoyMnzO2 (NCM)/graphite cells at extreme conditions such as under high temperature or with high charge voltage limit. However, the main factors dominating the long-term cycling performance under normal operations remain elusive. Quantitative analyses of the electrode surface evolution for a commercial 18650 LiNi0.5Co0.2Mn0.3O2 (NCM523)/graphite cell during ca. 3000 cycles under normal operation are presented. Electrochemical analyses and inductively coupled plasma-optical emission spectroscopy (ICP-OES) confirm lithium inventory loss accounts for ca...
March 24, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28338314/surface-layer-evolution-on-graphite-during-electrochemical-sodium-tetraglyme-co-intercalation
#13
Julia Maibach, Fabian Jeschull, Daniel Brandell, Kristina Edstrom, Mario Valvo
One obstacle in sodium ion batteries is the lack of suitable anode materials. As recently shown, the most common anode material of the state of the art lithium ion batteries, graphite, can be used for sodium ion storage as well, if ether-based electrolyte solvents are used. These solvents co-intercalate with the sodium ions leading to the highly reversible formation of ternary graphite intercalation compounds (t-GIC). In order for the solvent co-intercalation to work efficiently, it is expected that only a very thin surface layer forms during electrochemical cycling...
March 24, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28338264/engineering-high-energy-interfacial-structures-for-high-performance-oxygen-involving-electrocatalysis
#14
Chunxian Guo, Yao Zheng, Jingrun Ran, Fangxi Xie, Mietek Jaroniec, Shi-Zhang Qiao
Engineering high-energy interfacial structures for high-performance electrocatalysis is achieved by chemical coupling of active CoO nanoclusters and high-index facet Mn3 O4 nano-octahedrons (hi-Mn3 O4 ). A thorough characterization, including synchrotron-based near edge X-ray absorption fine structure, reveals that strong interactions between both components promote the formation of high-energy interfacial Mn-O-Co species and high oxidation state CoO, from which electrons are drawn by Mn(III) -O present in hi-Mn3 O4 ...
March 24, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28338158/-diagnosis-and-treatment-of-duodenal-injury-and-fistula
#15
Kunmei Gong, Shikui Guo, Kunhua Wang
Duodenal injury is a serious abdominal organ injury. Duodenal fistula is one of the most serious complications in gastrointestinal surgery, which is concerned for its critical status, difficulty in treatment and high mortality. Thoracic and abdominal compound closed injury and a small part of open injury are common causes of duodenal injury. Iatrogenic or traumatic injury, malnutrition, cancer, tuberculosis, Crohn's disease etc. are common causes of duodenal fistula, however, there has been still lacking of ideal diagnosis and treatment by now...
March 25, 2017: Zhonghua Wei Chang Wai Ke za Zhi, Chinese Journal of Gastrointestinal Surgery
https://www.readbyqxmd.com/read/28338067/ultrathin-nickel-hydroxide-nanosheet-arrays-grafted-biomass-derived-honeycomb-like-porous-carbon-with-improved-electrochemical-performance-as-a-supercapacitive-material
#16
Goli Nagaraju, Sung Min Cha, Jae Su Yu
Three-dimensional hierarchical honeycomb-like activated porous carbon pillared ultrathin Ni(OH)2 nanosheets (Ni(OH)2 NSs@HAPC) for use as supercapacitor materials were facilely synthesized. With an aid of pine cone flowers as a biomass source, HAPC conducting scaffolds were prepared by the alkali treatment and pyrolysis methods under an inert gas atmosphere. Subsequently, the Ni(OH)2 NSs were synthesized evenly on the surface of HAPC via a solvothermal method. The resulting HAPC and Ni(OH)2 NSs@HAPC composite materials offered free pathways for effective diffusion of electrolyte ions and fast transportation of electrons when employed as an electrode material...
March 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28337917/micrometer-precise-determination-of-the-thin-electrolyte-layer-of-a-spectroelectrochemical-cell-by-microelectrode-approach-curves
#17
Dennis Hiltrop, Justus Masa, Alexander J R Botz, Armin Lindner, Wolfgang Schuhmann, Martin Muhler
A spectroelectrochemical cell is presented that allows investigations of electrochemical reactions by means of attenuated total reflection infrared (ATR-IR) spectroscopy. The electrode holder for the working (WE), counter and reference electrode as mounted in the IR spectrometer cause the formation of a thin electrolyte layer between the internal reflection element (IRE) and the surface of the WE. The thickness of this thin electrolyte layer (dTL) was estimated by performing a scanning electrochemical microscopy-(SECM) like approach of a Pt microelectrode (ME), which was leveled with the WE towards the IRE surface...
March 24, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28337912/nanostructured-nickel-cobalt-titanium-alloy-grown-on-titanium-substrate-as-efficient-electrocatalysts-for-alkaline-water-electrolysis
#18
Pandian Ganesan, Sivanantham Arumugam, Sangaraju Shanmugam
One of the important challenges in alkaline water electrolysis are to utilize a bifunctional catalyst for both hydrogen evolution (HER) and oxygen evolution (OER) reactions to increase the efficiency of water splitting devices for the long durable operations. Herein, nickel-cobalt-titanium alloy directly grown on a high corrosion resistance titanium foil (NCT) by a simple, single and rapid electrochemical deposition at room temperature. The electrocatalytic activity of NCT alloy electrodes is evaluated for both HER and OER in aqueous electrolyte...
March 24, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28337908/detection-of-2-4-6-trinitrotoluene-using-a-miniaturized-disposable-electrochemical-sensor-with-an-ionic-liquid-gel-polymer-electrolyte-film
#19
Holly A Yu, Junqiao Lee, Simon W Lewis, Debbie Sue Silvester
A new electrochemical method to detect and quantify the explosive compound 2,4,6-trinitrotoluene (TNT) in aqueous solutions is demonstrated. A disposable thin-film electrode modified with a droplet of a gel-polymer electrolyte (GPE) was immersed directly into samples of TNT at concentrations of 1-10 μg/mL. The GPE contained the hydrophobic room temperature ionic liquid (RTIL) trihexyltetradecylphosphonium bis(trifluoromethylsulfonyl)imide ([P14,6,6,6][NTf2]) and the polymer poly(hexyl methacrylate) (PHMA)...
March 24, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28337883/evaluation-of-tolerance-and-safety-of-conversion-from-mycophenolate-mofetil-to-enteric-coated-mycophenolic-acid-in-renal-transplant-recipients
#20
L W Qiao, Q S Qu, X Jiang
This study was designed to evaluate the curative effect of conversion from mycophenolate mofetil (MMF) to enteric-coated mycophenolate sodium tablets (EC-MPS) and its safety. One hundred and twenty renal transplant recipients who developed MMF-associated chronic diarrhea were selected as research subjects and treated with EC-MPS. The patients were followed up for 12 months to compare the improvement of gastrointestinal symptoms and the indexes such as carbon dioxide combining power (CO2CP), serum sodium, serum potassium, serum creatinine (Scr) and 24-h urine protein before and after conversion treatment...
January 2017: Journal of Biological Regulators and Homeostatic Agents
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