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Laifa Shen, Yi Wang, Haifeng Lv, Shuangqiang Chen, Peter A van Aken, Xiaojun Wu, Joachim Maier, Yan Yu
Sodium-ion batteries are emerging as promising candidates for grid energy storage because of the abundant sodium resources and low cost. However, the identification and development of suitable anode materials is far from being satisfactory. Here, it is demonstrated that the Ti2 Nb2 O9 nanosheets with tunnel structure can be used as suitable anode materials for sodium-ion batteries. Ti2 Nb2 O9 nanosheets are synthesized by liquid exfoliation combined with topotactic dehydration, delivering a high reversible capacity of 250 mAh g-1 at 50 mA g-1 at a suitable average voltage of ≈0...
October 18, 2018: Advanced Materials
Janek Senaratne, Thiloththama Thisaranie Herath, Diane Beaudette, Marleen Irwin, Sajad Gulamhusein, Manohara Piyasiri Senaratne
BACKGROUND: The DANPACE study suggested implanting dual-pacing dual-sensing dual-response rate-adaptive (DDDR) pacemakers in patients with sick sinus syndrome, even though 90.7% of their atrial-pacing atrial-sensing inhibited-response rate-adaptive (AAIR) group did not require upgrade. Most centers implant DDDR pacemakers due to risk of future atrioventricular (AV) block. Given that AAIR pacemakers are less expensive, have one less lead with potentially one less point of complication, we question whether DDDR pacemakers are superior to AAIR pacemakers...
October 2018: Medicine (Baltimore)
Hong Seok Jo, Hyuk-Jin Kwon, Tae-Gun Kim, Chan-Woo Park, Seongpil An, Alexander L Yarin, Sam S Yoon
Electrospun metal-plated nanofibers and supersonically sprayed nanowires were used to fabricate hybrid films exhibiting a superior low sheet resistance of 0.18 Ω sq-1, a transparency of 91.1%, and a figure-of-merit of 2.315 Ω-1. The films are suitable to serve as thermal sensors and heaters. Such hybrid transparent conducting films are highly flexible and thus wearable. They can be used as body-temperature monitors and heaters. The employed hybrid approach improved the sheet resistance diminishing it to a minimum, while maintaining transparency...
October 18, 2018: Nanoscale
Krzysztof Artur Bogdanowicz, Pawel Gancarz, Michal Filapek, Damian Pociecha, Monika Marzec, Ida Chojnacka, Agnieszka Iwan
New liquid crystalline thiophene esters, thiophene-3-yl 3,4,5-tris(n-dodecan-1-yloxy)benzoate (ThBz1) and thiophene-3-yl 3,4,5-tris[4-(n-dodecan-1-yloxy)benzyloxy]benzoate (ThBz2), were synthesized for use in lithium-ion batteries as safe, new solvent-free ionic conductors. Both compounds were synthesized in multi-step reactions and were characterized via 1H, 13C NMR and FT-IR spectroscopy, confirming the formation of the desired products. ThBz1 and ThBz2 showed good thermal stability and liquid crystalline behaviour...
October 18, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
Luke Wylie, Zoe L Seeger, Amber N Hancock, Ekaterina I Izgorodina
Radical stability has been subject to continuous research due to its importance in polymerization as well as in all-organic batteries. Recently, the SOMO-HOMO conversion was identified as the main factor in controlling the stability of distonic radicals, for which the negative charge resides on the same molecule. Based on this finding, the idea of ionic liquids stabilizing radicals was hypothesized in this study. A series of ionic liquids were tested in EPR measurements of the 3-carboxy-2,2,5,5-tetramethyl-pyrroline-1-oxyl...
October 18, 2018: Physical Chemistry Chemical Physics: PCCP
Sha Zeng, Xiao Tong, Susheng Zhou, Bo Lv, Jian Qiao, Yanhui Song, Minghai Chen, Jiangtao Di, Qingwen Li
As a promising energy-storage device, rechargeable Zn-air batteries have attracted considerable interests. Herein, a bifunctional oxygen electrode film prepared by adhering NiCo2 O4 nanosheets to a nitrogen and oxygen dual-doped carbon nanotubes film in a large scale is reported. The resulting self-supporting film electrode is multifunctional, which integrates a porous conducting structure for air diffusion and charge transfer, high-performance catalysts for oxygen reduction and evolution, and novel structural flexibility...
October 17, 2018: Small
Xiang Chen, Hao-Ran Li, Xin Shen, Qiang Zhang
The intrinsic instability of organic electrolytes seriously impedes the practical applications of high-capacity metal anodes, such as lithium and sodium metal anodes. The ion-solvent complexes can even further promote the decomposition of electrolytes on metal anodes. Herein, first-principles calculations were performed to investigate the origin of the reduced reductive stability of ion-solvent complexes. Both ester and ether electrolyte solvents are selected to interact with Li+, Na+, K+, Mg2+, and Ca2+. The LUMO energy levels of ion-ester complexes exhibit a linear relationship with the binding energy, regulated by the ratio of carbon atomic orbital in the LUMO...
October 18, 2018: Angewandte Chemie
Yaqin Wang, Xinxin Xu, Luyao Liu, Jin Chen, Guimei Shi
Zn-air batteries, promising energy storage equipment with high energy density, light weight and a compact structure, are a perfect power source for electric vehicles. For a Zn-air battery, the activity of the air cathode electrocatalyst plays an important role in its performance. Here, employing a coordination polymer as a precursor, a composite material built from Co3O4 and Co-N active centres with nitrogen-doped mesoporous carbon as a matrix has been synthesized successfully. This composite material possesses outstanding activity and stability in the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) processes...
October 18, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
Jing-Feng Wang, Dan-Nong He
The in situ growth of Sn/SnO heterostructured nanospheres embedded in crumpled graphene is based on a new strategy for the calcination of tin oleate coating on the crystal surface of sodium carbonate. Sn/SnO nanospheres and crumpled graphene are acquired simultaneously without external forces involved. The obtained composite exhibits superior electrochemical properties when used as an anode material for lithium-ion batteries.
October 18, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
Kyoungmin Min, Eunseog Cho
Intergranular cracking in the agglomerated form of secondary particles has been regarded as a major cause for mechanical degradation in layered oxide cathode materials for Li-ion batteries, but its detailed mechanistic origin linked to the mechanical properties of these materials is still unknown. In this study, a mesoscale simulation based on the description of the interaction between primary particles is established by combining the model of the shifted-force Lennard-Jones potential and granular Hertzian model to construct the microstructure of secondary particles of cathode materials...
October 18, 2018: Physical Chemistry Chemical Physics: PCCP
Mark J Hamilton, John McLean, Sarah Cumming, Bob Ballantyne, Josephine McGhie, Ravi Jampana, Cheryl Longman, Jonathan J Evans, Darren G Monckton, Maria Elena Farrugia
Background: Central nervous system involvement in myotonic dystrophy type 1 (DM1) is associated with cognitive deficits, impaired social performance and excessive somnolence, which greatly impact quality of life. With the advent of clinical trials in DM1, there is a pressing need to identify outcome measures for quantification of central symptoms that are feasible and valid. In this context, we sought to evaluate neuropsychological and self-reported measures currently recommended by expert consensus, with particular reference to their specificity for central nervous system involvement in a moderate-sized DM1 cohort...
2018: Frontiers in Neurology
Tuukka O Piiponniemi, Teija Parkkari, Taneli Heikkinen, Jukka Puoliväli, Larry C Park, Roger Cachope, Maksym V Kopanitsa
Cognitive disturbances often predate characteristic motor dysfunction in individuals with Huntington's disease (HD) and place an increasing burden on the HD patients and caregivers with the progression of the disorder. Therefore, application of maximally translational cognitive tests to animal models of HD is imperative for the development of treatments that could alleviate cognitive decline in human patients. Here, we examined the performance of the Q175 mouse knock-in model of HD in the touch screen version of the paired associates learning (PAL) task...
2018: Frontiers in Behavioral Neuroscience
Rebecca L Stephens, Benjamin Langworthy, Sarah J Short, Barbara D Goldman, Jessica B Girault, Jason P Fine, J Steven Reznick, John H Gilmore
The study of executive function (EF) has become increasingly popular in multiple areas of research. A wealth of evidence has supported the value of EF in shaping notable outcomes across typical and atypical development; however, little evidence has supported the cognitive contributors to early EF development. The current study used data from a large longitudinal sample of healthy children to investigate the differential influence of verbal and nonverbal cognition on later EF. Participants were assessed at 2 years of age using the Mullen Scales of Early Learning, and Mullen scores were used to calculate nonverbal and verbal developmental quotients...
2018: Journal of Cognition and Development: Official Journal of the Cognitive Development Society
Olivier Godefroy, Hugo Yaïche, Hervé Taillia, Flavie Bompaire, Claudine Nédélec-Ciceri, Camille Bonnin, Jérôme Varvat, Françoise Vincent-Grangette, Momar Diouf, Jean-Louis Mas, Sandrine Canaple, Chantal Lamy, Audrey Arnoux, Claire Leclercq, Sophie Tasseel-Ponche, Martine Roussel, Mélanie Barbay
OBJECTIVE: To validate the ability of a specifically developed cognitive risk score to identify patients at risk of poststroke neurocognitive disorders (NCDs) who are eligible for a comprehensive cognitive assessment. METHODS: After assessing 404 patients (infarct 91.3%) in the Groupe de Réflexion pour l'Evaluation Cognitive VASCulaire (GRECogVASC) cross-sectional study with the National Institute of Neurological Disorders and Stroke-Canadian Stroke Network battery 6 months after stroke, we used multivariable logistic regression and bootstrap analyses to determine factors associated with NCDs...
October 17, 2018: Neurology
Antonino Granata, Caterina Gandolfo, Carlo Acierno, Marcello Piazza, Gaetano Burgio, Mario Traina
BACKGROUND: While coins are still the most common foreign bodies swallowed by children, ingestion of batteries has become more frequent among children due to the increasing access to electronic toys and devices. Coin battery ingestion is potentially life threatening for children. Aortoesophageal fistula is the most common cause of death in children who have swallowed coin batteries, and there have not been any reported survivors. CASE PRESENTATION: A 3-year-old Caucasian girl presented to the emergency room of a community hospital complaining of abdominal pain...
October 18, 2018: Journal of Medical Case Reports
Junling Li, Ran Yang, Kai Xia, Tian Wang, Binbin Nie, Kuo Gao, Jianxin Chen, Huihui Zhao, Yubo Li, Wei Wang
BACKGROUND: The etiology of depression and its effective therapeutic treatment have not been clearly identified. Using behavioral phenotyping and resting-state functional magnetic resonance imaging (r-fMRI), we investigated the behavioral impact and cerebral alterations of chronic unpredictable mild stress (CUMS) in the rat. We also evaluated the efficacy of telmisartan therapy in this rodent model of depression. METHODS: Thirty-two rats were divided into 4 groups: a control group(C group), a stress group(S group), a stress + telmisartan(0...
October 17, 2018: BMC Psychiatry
Cláudia Sousa, Mariana Rigueiro-Neves, Telma Miranda, Paulo Alegria, José Vale, Ana Margarida Passos, Dawn Langdon, Maria José Sá
BACKGROUND: The validation of international cognitive batteries in different multiple sclerosis (MS) populations is essential. Our objective was to obtain normative data for the Portuguese population of the Brief International Cognitive Assessment for Multiple Sclerosis (BICAMS) and assess its reliability. METHODS: The BICAMS was applied to 105 MS patients and 60 age, gender and education matched healthy controls (HC). In order to test its reliability, BICAMS was re-administered in a subset of 25 patients after a 7-month interval...
October 17, 2018: BMC Neurology
Su Mi Park, Jung-Seok Choi, Ji Sun Lee, Jun-Young Lee, Saerom Lee, Hee Yeon Jung
This study aimed to examine the executive functioning of survivors exposed to recent sexual assaults. Twenty-seven female rape survivors who met the criterion for acute stress disorder (ASD) were enrolled and completed the assessment within 4 weeks after the traumatic experience. Additionally, 25 age-matched female health controls (HC) never exposed to such a traumatic event were enrolled. The assessments evaluated psychiatric symptoms including post-traumatic stress symptoms, depression, anxiety, and trait and state anger; general intelligence indexed by intellectual quotient (IQ); and executive functioning including set-shift/attention, planning, spatial working memory, and inhibition using the Cambridge Neuropsychological Test Automated Battery...
October 16, 2018: Journal of Clinical Medicine
Tae-Ha Gu, Daniel Adjei Agyeman, Seung-Jae Shin, Xiaoyan Jin, Jang Mee Lee, Hyungjun Kim, Yong-Mook Kang, Seong-Ju Hwang
An effective chemical way to optimize the oxygen electrocatalyst and Li-O₂ electrode functionalities of metal oxide can be developed by the control of chemical bond nature with the surface anchoring of highly-oxidized selenate (SeO₄²-) clusters. The bond competition between (Se6+-O) and (Mn-O) bonds is quite effective in stabilizing Jahn-Teller-active Mn3+ state and in increasing oxygen electron density of α-MnO₂ nanowire (NW). The selenate-anchored α-MnO₂ NW shows excellent oxygen electrocatalytic activity and electrode performance for Li-O₂ batteries, which is due to the improved charge transfer kinetics and reversible formation/decomposition of Li₂O₂...
October 17, 2018: Angewandte Chemie
Arthur Gus Manfro, Marcos Santoro, Guilherme Vanoni Polanczyk, Ary Gadelha, Pedro Mario Pan, Rodrigo Affonseca Bressan, Elisa Brietzke, Fernanda Talarico, Sintia Belangero, Luis Augusto Rohde, Giovanni Abrahão Salum
BACKGROUND: Recent studies have demonstrated the existence of a distinct late-onset attention deficit/hyperactivity disorder (ADHD) trajectory. Our objective is to test if there are distinct ADHD trajectories regarding age of onset from childhood to adolescence and to compare clinical manifestations, cognitive functions and genetic risk for ADHD among distinct longitudinal groups. METHOD: Nine hundred and twenty four children and adolescents from the community participated in the study...
October 17, 2018: Journal of Child Psychology and Psychiatry, and Allied Disciplines
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