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https://www.readbyqxmd.com/read/27921361/lithium-ion-transfer-kinetics-of-single-limn2-o4-particles
#1
Giorgia Zampardi, Christopher Batchelor-McAuley, Enno Kätelhön, Richard G Compton
A stochastic investigation of lithium deinsertion from individual 200-nm-sized particles of LiMn2 O4 reveals the rate-determining step at high overpotentials to be the transfer of the cation across the particle-electrolyte interface. Measurement of the (electro)chemical behavior of the spinel is undertaken without forming a conductive composite electrode. The kinetics of the interfacial ion transfer defines a theoretical upper limit for the discharge rates of batteries using LiMn2 O4 in an aqueous environment...
December 6, 2016: Angewandte Chemie
https://www.readbyqxmd.com/read/27921332/metal-organic-framework-impregnated-with-binary-ionic-liquid-for-safe-proton-conduction-above-100-oc
#2
Xiao-Li Sun, Wei-Hua Deng, Hui Chen, Hong-Liang Han, Jared M Taylor, Chong-Qing Wan, Gang Xu
To develop proton conducting materials under low humidity condition and moderate working temperature still remains challenging for fuel-cell technology. Herein, we show a new type of proton-conducting material, EIMS-HTFSA@MIL, which was prepared by impregnating binary ionic liquids, EIMS-HTFSA, into mesoporous metal-organic framework, MIL-101. Taking advantages of the ionic liquid, such as high thermal stability, non-volatility, non-flammability and low corrosivity, EIMS-HTFSA@MIL shows potential application on proton conduction above 100 oC as a safe electrolyte...
December 5, 2016: Chemistry: a European Journal
https://www.readbyqxmd.com/read/27921141/kidney-stones-diseases-and-glycaemic-statuses-focus-on-the-latest-clinical-evidences
#3
REVIEW
Leonardo Spatola, Claudio Angelini, Salvatore Badalamenti, Silvio Maringhini, Giovanni Gambaro
Diabetes and obesity are already recognized as potential risk factors for nephrolithiasis, especially for uric acid stones. Insulin resistance and hyperinsulinemia actively contribute to impaired ability to excrete an acid load and altered ammonium production, leading to a lower urinary pH compared to non-diabetic controls. All these electrolytic disorders play an important role in stone formation and aggregation, especially in uric acid stones. There are still missing points in scientific evidence if the increased risk in stone formation is already existing even in the prediabetic statuses (isolated impaired glucose tolerance, isolated impaired fasting glucose, and associated impaired glucose tolerance/impaired fasting glucose) as well as it is worth to consider the same level of risk...
December 5, 2016: Urolithiasis
https://www.readbyqxmd.com/read/27921058/celiac-crisis-associated-with-herpes-simplex-virus-esophagitis
#4
Alan Chen, Christopher M Linz, Julie L Tsay, Ming Jin, Samer S El-Dika
Celiac crisis is a rare presentation of celiac disease that is characterized by life-threatening electrolyte abnormalities, vitamin and mineral deficiencies, and diarrhea. Triggers for celiac crisis include major surgeries, pancreatitis, and infections of cytomegalovirus, and salmonella. A 24-year-old woman presented with celiac crisis associated with severe herpes simplex virus (HSV) esophagitis. This case demonstrates that nutritional deficiencies seen in celiac disease can result in a relative immunodeficiency, which may lead to other infectious complications...
August 2016: ACG Case Reports Journal
https://www.readbyqxmd.com/read/27920706/ipilimumab-induced-enteritis-without-colitis-a-new-challenge
#5
Marcus Messmer, Sunita Upreti, Yaman Tarabishy, Nikhilesh Mazumder, Reezwana Chowdhury, Mark Yarchoan, Matthias Holdhoff
INTRODUCTION: Ipilimumab is an immune checkpoint inhibitor targeting cytotoxic T-lymphocyte associated antigen 4 (CTLA4), approved to treat metastatic melanoma. It was the first therapy shown to prolong survival in a large, randomized clinical trial. However, immune-related adverse events are common and can be severe. Enterocolitis is a common adverse event with ipilimumab, but enteritis without colitis has not been previously described. CASE REPORT: An 83-year-old man presented to our hospital with grade 3 diarrhea for 5 days...
September 2016: Case Reports in Oncology
https://www.readbyqxmd.com/read/27919519/investigation-of-the-acid-base-and-electromigration-properties-of-5-azacytosine-derivatives-using-capillary-electrophoresis-and-density-functional-theory-calculations
#6
Denisa Geffertová, Syed Tahir Ali, Veronika Šolínová, Marcela Krečmerová, Antonín Holý, Zdeněk Havlas, Václav Kašička
Capillary electrophoresis (CE) and quantum mechanical density functional theory (DFT) were applied to the investigation of the acid-base and electromigration properties of important compounds: newly synthesized derivatives of 5-azacytosine - analogs of efficient antiviral drug cidofovir. These compounds exhibit a strong antiviral activity and they are considered as potential new antiviral agents. For their characterization and application, it is necessary to know their acid-base properties, particularly the acidity constants (pKa) of their ionogenic groups (the basic N(3) atom of the triazine ring and the acidic phosphonic acid group in the alkyl chain)...
November 29, 2016: Journal of Chromatography. A
https://www.readbyqxmd.com/read/27918646/bionanofiber-assisted-decoration-of-few-layered-mose2-nanosheets-on-3d-conductive-networks-for-efficient-hydrogen-evolution
#7
Feili Lai, Dingyu Yong, Xueliang Ning, Bicai Pan, Yue-E Miao, Tianxi Liu
Molybdenum diselenide (MoSe2 ) has emerged as a promising electrocatalyst for hydrogen evolution reaction (HER). However, its properties are still confined due to the limited active sites and poor conductivity. Thus, it remains a great challenge to synergistically achieve structural and electronic modulations for MoSe2 -based HER catalysts because of the contradictory relationship between these two characteristics. Herein, bacterial cellulose-derived carbon nanofibers are used to assist the uniform growth of few-layered MoSe2 nanosheets, which effectively increase the active sites of MoSe2 for hydrogen atom adsorption...
December 5, 2016: Small
https://www.readbyqxmd.com/read/27918642/high-performance-porphyrin-based-dye-sensitized-solar-cells-with-both-iodine-and-cobalt-redox-shuttles
#8
Huaide Xiang, Wei Fan, Jiahui Li, Tianyue Li, Neil Robertson, Xiongrong Song, Wenjun Wu, Zhaohui Wang, Weihong Zhu, He Tian
Recently, enormous research passion has been devoted to enhance the power conversion efficiency (PCE) of porphyrin sensitizers for DSSCs, but the major stumbling block is its absorption defects in visible spectrum region. To address the challenge, herein we reported a duplexing high performance photovoltaic result for DSSCs based on a novel D-π-A sensitizer FW-1 7H-Dibenzo[c,g] carbazole-substituted and fused Zn-porphyrin, co-sensitized with benzotriazole featured dye (WS-5) in iodine and cobalt redox system and got high PCE of 10...
December 5, 2016: ChemSusChem
https://www.readbyqxmd.com/read/27918639/evaluation-of-an-outpatient-protocol-in-the-treatment-of-canine-parvoviral-enteritis
#9
Emilee C Venn, Karolina Preisner, Pedro L Boscan, David C Twedt, Lauren A Sullivan
OBJECTIVE: To compare 2 treatment protocols (standard in-hospital versus modified outpatient) in affecting the duration of treatment or survival of dogs with parvoviral enteritis. DESIGN: Prospective, randomized study. SETTING: University teaching hospital. ANIMALS: Client-owned dogs with naturally acquired parvovirus were randomized to receive either an inpatient (n = 20) or outpatient (n = 20) treatment protocol. INTERVENTIONS: Both groups received intravenous (IV) fluid resuscitation and correction of hypoglycemia at hospital admission...
December 5, 2016: Journal of Veterinary Emergency and Critical Care
https://www.readbyqxmd.com/read/27918030/solvation-behavior-of-carbonate-based-electrolytes-in-sodium-ion-batteries
#10
Arthur V Cresce, Selena M Russell, Oleg Borodin, Joshua A Allen, Marshall A Schroeder, Michael Dai, Jing Peng, Mallory P Gobet, Steven G Greenbaum, Reginald E Rogers, Kang Xu
Sodium ion batteries are on the cusp of being a commercially available technology. Compared to lithium ion batteries, sodium ion batteries can potentially offer an attractive dollar-per-kilowatt-hour value, though at the penalty of reduced energy density. As a materials system, sodium ion batteries present a unique opportunity to apply lessons learned in the study of electrolytes for lithium ion batteries; specifically, the behavior of the sodium ion in an organic carbonate solution and the relationship of ion solvation with electrode surface passivation...
December 5, 2016: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/27918028/proton-conduction-mechanisms-in-the-phosphoric-acid-water-system-h4p2o7-h3po4%C3%A2-2h2o-a-1-h-31-p-and-17-o-pfg-nmr-and-conductivity-study
#11
Jan-Patrick Melchior, Klaus-Dieter Kreuer, Joachim Maier
Ionic charge carrier formation and mobility, including the underlying conduction mechanisms, are investigated for phosphoric acid at water contents relevant for the acid's application as electrolyte in fuel cells. The high conductivity contribution from structural diffusion involving intermolecular proton transfer (∼97%) in neat phosphoric acid (H3PO4) passes through a maximum at this composition. Hydrogen bond network frustration (imbalance of the number of proton donors and acceptors), which is closely related to the appearance of structural diffusion, decreases with both elimination and addition of water...
December 5, 2016: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/27918027/why-do-proton-conducting-polybenzimidazole-phosphoric-acid-membranes-perform-well-in-high-temperature-pem-fuel-cells
#12
Jan-Patrick Melchior, Günter Majer, Klaus-Dieter Kreuer
Transport properties and hydration behavior of phosphoric acid/(benz)imidazole mixtures are investigated by diverse NMR techniques, thermogravimetric analysis (TGA) and conductivity measurements. The monomeric systems can serve as models for phosphoric acid/poly-benzimidazole membranes which are known for their exceptional performance in high temperature PEM fuel cells. (1)H- and (31)P-NMR data show benzimidazole acting as a strong Brønsted base with respect to neat phosphoric acid. Since benzimidazole's nitrogens are fully protonated with a low rate for proton exchange with phosphate species, proton diffusion and conduction processes must take place within the hydrogen bond network of phosphoric acid only...
December 5, 2016: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/27917440/solid-flocculation-and-emulsifying-activities-of-the-lipopolysaccharide-produced-by-trichosporon-mycotoxinivorans-cla2
#13
Vitor S Domingues, Andrea S Monteiro, Gabriella Freitas Ferreira, Vera L Santos
The objective of this study was to evaluate the capability of a lipopolysaccharide, produced by Trichosporon mycotoxinivorans CLA2 using residue of biodiesel processing, to flocculate two different solids in suspension. In addition, the emulsifying activity and the stability of this lipopolysaccharide in response to pH and temperature variations and in the presence of some electrolytes were evaluated. The lipopolysaccharide was used in concentrations ranging from 20 to 80 mgL(-1) to flocculate 100 gL(-1) of kaolin and 50 gL(-1) of charcoal...
December 5, 2016: Applied Biochemistry and Biotechnology
https://www.readbyqxmd.com/read/27917181/nitric-oxide-responsive-heavy-metal-associated-gene-athmad1-contributes-to-development-and-disease-resistance-in-arabidopsis-thaliana
#14
Q Muhammad Imran, Noreen Falak, Adil Hussain, Bong-Gyu Mun, Arti Sharma, Sang-Uk Lee, Kyung-Min Kim, Byung-Wook Yun
Exposure of plants to different biotic and abiotic stress condition instigates significant change in the cellular redox status; resulting in the elevation of reactive nitrogen species that play signaling role in mediating defense responses. Heavy metal associated (HMA) domain containing genes are required for spatio-temporal transportation of metal ions that bind with various enzymes and co-factors within the cell. To uncover the underlying mechanisms mediated by AtHMA genes, we identified 14 Arabidopsis HMA genes that were differentially expressed in response to nitrosative stress through RNA-seq analysis...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27916143/hyponatremia-effect-in-patients-with-alcohol-dependence-on-their-physical-and-mental-health-status
#15
Ordak Michal, Maj-Zurawska Magdalena, Matsumoto Halina, Bujalska-Zadrozny Magdalena, Nasierowski Tadeusz, Muszynska Elzbieta, Wojnar Marcin
Hyponatremia, i.e. reduction of sodium level in the blood plasma below 135 mmol/L, is one of the most common electrolyte disorders occurring in people addicted to alcohol. Numerous psychopathological symptoms may be significantly associated with its occurrence. Since sodium is one of the main bioelements, which is responsible for proper neuromuscular excitability maintenance and contributes in nerve impulses conduction, sodium balance disorders may be related to a risk to basic life functions. The tested group included 100 alcohol dependent patients (M = 90, F = 10)...
December 2016: Alcohol
https://www.readbyqxmd.com/read/27915449/common-variants-in-cldn14-are-associated-with-differential-excretion-of-magnesium-over-calcium-in-urine
#16
REVIEW
Tanguy Corre, Eric Olinger, Sarah E Harris, Michela Traglia, Sheila Ulivi, Stefania Lenarduzzi, Hendrica Belge, Sonia Youhanna, Natsuko Tokonami, Olivier Bonny, Pascal Houillier, Ozren Polasek, Ian J Deary, John M Starr, Daniela Toniolo, Paolo Gasparini, Peter Vollenweider, Caroline Hayward, Murielle Bochud, Olivier Devuyst
The nature and importance of genetic factors regulating the differential handling of Ca(2+) and Mg(2+) by the renal tubule in the general population are poorly defined. We conducted a genome-wide meta-analysis of urinary magnesium-to-calcium ratio to identify associated common genetic variants. We included 9320 adults of European descent from four genetic isolates and three urban cohorts. Urinary magnesium and calcium concentrations were measured centrally in spot urine, and each study conducted linear regression analysis of urinary magnesium-to-calcium ratio on ~2...
December 3, 2016: Pflügers Archiv: European Journal of Physiology
https://www.readbyqxmd.com/read/27915351/the-role-of-nephrologist-in-the-intensive-care-unit
#17
Zoltán H Endre
Participation by nephrologists is needed in most intensive care units, even when such units are 'closed'. This participation should assist with diagnosis and management of intrinsic and complex renal diseases such as vasculitis, complex metabolic and electrolyte disorders including hyponatremia, and acute kidney injury (AKI) with and without underlying chronic kidney disease (CKD). Early nephrologist involvement will also facilitate transition to continuing care and follow-up after an episode of AKI, but may also assist in avoiding dialysis where treatment is futile...
December 3, 2016: Blood Purification
https://www.readbyqxmd.com/read/27915174/molecular-and-physiological-responses-of-iranian-perennial-ryegrass-as-affected-by-trinexapac-ethyl-paclobutrazol-and-abscisic-acid-under-drought-stress
#18
Mohammad Hossein Sheikh Mohammadi, Nematollah Etemadi, Mohammad Mehdi Arab, Mostafa Aalifar, Mostafa Arab, Mohammad Pessarakli
Drought stress is the major limiting factor which affects turfgrass management in area with restricted rainfall or irrigation water supply. Trinexapac ethyl (TE), Paclobutrazol (PAC) and Abscisic acid (ABA) are three plant growth regulators (PGRs) that are commonly used on turf species for increasing their tolerance to different environmental stresses such as drought. However, little is known about the impact of PGRs on stress tolerance of Iranian Perennial ryegrass (Lolium perenne). The present study was conducted to examine the visual and physiological changes of Iranian Perennial ryegrass in response to foliar application of TE, PAC, and ABA under drought stress conditions...
November 27, 2016: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/27915002/label-free-histamine-detection-with-nanofluidic-diodes-through-metal-ion-displacement-mechanism
#19
Mubarak Ali, Patricio Ramirez, Ivana Duznovic, Saima Nasir, Salvador Mafe, Wolfgang Ensinger
We design and characterize a nanofluidic device for the label-free specific detection of histamine neurotransmitter based on a metal ion displacement mechanism. The sensor consists of an asymmetric polymer nanopore fabricated via ion track-etching technique. The nanopore sensor surface having metal-nitrilotriacetic (NTA-Ni(2+)) chelates is obtained by covalent coupling of native carboxylic acid groups with Nα,Nα-bis(carboxymethyl)-l-lysine (BCML), followed by exposure to Ni(2+) ion solution. The BCML immobilization and subsequent Ni(2+) ion complexation with NTA moieties change the surface charge concentration, which has a significant impact on the current-voltage (I-V) curve after chemical modification of the nanopore...
November 28, 2016: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/27914726/removal-of-2-mib-and-geosmin-by-electrogenerated-persulfate-performance-mechanism-and-pathways
#20
Lingjun Bu, Shiqing Zhou, Zhou Shi, Lin Deng, Naiyun Gao
In this study, the degradation of 2-methylisoborneol (2-MIB) and geosmin (GSM) was evaluated by electrochemical oxidation (EO) using boron-doped diamond (BDD) electrode. Both 2-MIB and GSM could be degraded efficiently in sulfate electrolyte compared to inert nitrate or perchlorate electrolytes, implying that in-situ generated persulfate may be responsible for contaminants degradation. The observed linear relationship between 2-MIB (GSM) degradation rates and persulfate generation rates further proved that the in-situ generated persulfate enhanced 2-MIB (GSM) degradation...
November 30, 2016: Chemosphere
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