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Carlos Henrique Ferreira Camargo, Vinícius Aguiar Jobbins, Rafael Arthur Serpa, Frederico Antônio Berbetz, Jivago Szpoganicz Sabatini, Hélio Afonso Ghizoni Teive
OBJECTIVE: The aim of this study was to compare the cognitive deficits and olfaction in PD patients. PATIENTS AND METHODS: In all, 42 PD patients and 38 controls were selected. All the individuals in both groups underwent cognitive assessment with the SCOPA-Cog neuropsychological battery and Mini-Mental State Examination (MMSE) and olfactory assessment with the Sniffin' Sticks Screening 12 Test. Parkinson's disease dementia (PDD) was diagnosed using the International Parkinson and Movement Disorder Society (MDS) criteria...
August 13, 2018: Clinical Neurology and Neurosurgery
Michela Lupo, Giusy Olivito, Claudia Iacobacci, Silvia Clausi, Silvia Romano, Marcella Masciullo, Marco Molinari, Mara Cercignani, Marco Bozzali, Maria Leggio
Spinocerebellar ataxia type 2 (SCA2) is an autosomal dominant neurodegenerative disease characterized by a progressive cerebellar syndrome and multiple-domain cognitive impairments. The cerebellum is known to contribute to distinct functional networks related to higher-level functions. The aims of the present study were to investigate the different sub-components of attention and to analyse possible correlations between attention deficits and specific cerebellar regions in SCA2 patients. To this purpose, 11 SCA2 patients underwent an exhaustive attention battery that evaluated several attention sub-components...
July 31, 2018: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
Chen-Wen Fang, Chin-Hsien Lin, Yung-Ching Liu, Yang-Kun Ou
INTRODUCTION: This study investigated the differences in road-crossing behavior among healthy older adults and patients with Alzheimer's disease (AD). METHOD: Twelve pedestrians with mild AD and 24 age-, gender-, and education-matched controls were examined with a battery of cognitive, visual, and motor tests. Using a simulated two-lane, one-way road-crossing situation, we determined the remaining time and safety margin for each participant in traffic situations involving different vehicle speeds (40 km/h vs...
September 2018: Journal of Safety Research
W Persyn, H Houchi, C A Papillon, M Martinetti, M Antol, C Guillaumont, A Dervaux, M Naassila
BACKGROUND: Data have shown a role of α-synuclein in anxiety and also in addiction, particularly in alcohol use disorders (AUD). Since the comorbidity between AUD and anxiety is very high and because anxiety is an important factor in ethanol relapse, the aim of the present study was to investigate the role of α-synuclein in moderating ethanol intake, the anxiolytic effects of ethanol, and ethanol withdrawal-induced anxiety and convulsions in mice. The study aimed to determine whether SNCA variants moderated anxiety in ethanol-dependent patients...
August 18, 2018: Alcoholism, Clinical and Experimental Research
Dianne Slavin, Renee Fabus
Purpose: The purpose of this study was to assess the efficacy. of increasing spontaneous expressive language using a modified melodic intonation therapy (MIT) approach with a male participant diagnosed with acquired aphasia and apraxia who was 10 years post onset. Method: A therapeutic protocol consisting of vocal and linguistic tasks was administered. The participant attended two 50-min individual sessions and a 4-hr/week socialization program for three 12-week semesters...
August 14, 2018: American Journal of Speech-language Pathology
Bradley R Nullmeyer, Jae W Kwon, J David Robertson, Alexander Y Garnov
Radiation damage in solid-state semiconductors has, until now, placed strict limitations on the acceptable decay energies of radioisotopes in radiovoltaic cells. Relegation to low-energy beta-emitting isotopes has minimized the power output from these devices and limited the technology's ability to deliver greater energy densities and longer lifetimes than conventional batteries. We demonstrate the self-healing abilities of a liquid-phase semiconducting alloy which can withstand high-energy alpha radiation...
August 17, 2018: Scientific Reports
Zhiqian Wang, Xianyang Meng, Kun Chen, Somenath Mitra
We present the development of a novel battery comprising of iron(III) periodate complex cathode and zinc anode. The periodate complex (H7 Fe4 (IO4 )3 O8 ) was prepared by a precipitation reaction between Fe(NO3)3 and NaIO4 , and was used in battery development for the first time. The periodate complex along with 14% carbon nanotubes and a polytetrafluoroethylene coating formed a stable flexible electrode, and the battery showed specific capacity as high as 300 mAh g-1 . Compared to single-electron processes in conventional cathode reactions, the possibility to significantly enhancing cathode specific capacity via a multi-electron process associated with valence change from I(VII) to I2 is demonstrated...
August 17, 2018: ACS Applied Materials & Interfaces
Ruiting Yan, Qing Wang
Redox-targeting reactions of battery materials by redox molecules are extensively studied for energy storage since the first report in 2006. Implementation of the "redox-targeting" concept in redox flow batteries presents not only an innovative idea of battery design that considerably boosts the energy density of flow-battery system, but also an intriguing research platform applied to a wide variety of chemistries for different applications. Here, a critical overview of the recent progress in redox-targeting-based flow batteries is presented and the development of the technology in the various aspects from mechanistic understanding of the reaction kinetics to system optimization is highlighted...
August 17, 2018: Advanced Materials
Ewelina Bolimowska, Franca Castiglione, Julien Devemy, Hélène Rouault, Andrea Mele, Agilio A H Padua, Catherine C Santini
To increase the safety and stability of Lithium ion batteries, the development of electrolytes based on ionic liquids gained a lot of attention in recent years. However, with graphite electrodes neat ILs afford weak cycling performance in the absence of organic additives (e.g. vinylene carbonate, VC). The potential formation of a [Li+]-OVC interaction/coordination could have a major influence on the observed electrochemical behavior of Li-ion batteries. On a specific electrolyte, 1-hexyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide [C1C6Im][NTf2] in association with Li[NTf2] (1mol...
August 17, 2018: Journal of Physical Chemistry. B
Nicole A Ryan, Yashen Lin, Noah Mitchell-Ward, Johanna L Mathieu, Jeremiah X Johnson
Battery storage systems are attractive alternatives to conventional generators for frequency regulation due to their fast response time, high cycle efficiency, flexible scale, and decreasing cost. However, their implementation does not consistently reduce environmental impacts. To assess these impacts, we employed a life cycle assessment (LCA) framework. Our framework couples cradle-to-gate and end-of-life LCA data on lithium-ion batteries with a unit commitment and dispatch model. The model is run on a 9-bus power system with energy storage used for frequency regulation...
August 17, 2018: Environmental Science & Technology
Ran Chen, Amin Morteza Najarian, Niraja Kurapati, Ryan James Balla, Alexander Oleinick, Irina Svir, Christian Amatore, Richard L McCreery, Shigeru Amemiya
Applications of conducting carbon materials for highly efficient electrochemical energy devices require a greater fundamental understanding of heterogeneous electron-transfer (ET) mechanisms. This task, however, is highly challenging experimentally, because an adsorbing carbon surface may easily conceal its intrinsic reactivity through adventitious contamination. Herein, we employ nanoscale scanning electrochemical microscopy (SECM) and cyclic voltammetry to gain new insights into the interplay between heterogeneous ET and adsorption of a Co(III)/Co(II)-complex redox couple at the contamination-free surface of electron-beam-deposited carbon (eC)...
August 17, 2018: Analytical Chemistry
Shuguang Wang, Yanhong Shi, Chao-Ying Fan, Jinhua Liu, Yanfei Li, Xing-Long Wu, Haiming Xie, Jingping Zhang, Haizhu Sun
As important anodes in lithium-ion batteries (LIBs), graphene is always faced with the aggregation problem that makes most of active sites lose their function at high current densities, resulting in low Li-ion intercalation capacity and poor rate performance. To address this issue, layered g-C3N4@reduced graphene oxide composite (g-C3N4@RGO) was prepared via a scalable and easy strategy. The resulted g-C3N4@RGO possesses large interlayer distances, rich N-active sites and microporous structure, which largely improves Li storage performance...
August 17, 2018: ACS Applied Materials & Interfaces
Yi Guo, Minghao Sun, Hongqing Liang, Wen Ying, Xianqing Zeng, Yulong Ying, Shudong Zhou, Chengdu Liang, Zhan Lin, Xinsheng Peng
Minimizing the shuttle effect of polysulfides is crucial for practical application of lithium-sulfur (Li-S) batteries. However, the trade-off between effective suppression of the shuttle effect and fast redox reaction kinetics is inevitable for separator-based Li-S batteries. Herein, via a self-confined solid-conversion process, we develop a polystyrene sulfonate threaded well-intergrown HKUST-1 (Cu3(BTC)2) coated Celgard separator (PSS@HKUST-1/Celgard, PHC) for high performance Li-S batteries. The PHC membrane favors the interception and accommodation of long-chain polysulfides...
August 17, 2018: ACS Applied Materials & Interfaces
Radostina Stoyanova, Violeta Koleva, Antonia Stoyanova
The energy storage by redox intercalation reactions is, nowadays, the most effective rechargeable ion battery. When lithium is used as intercalating agents, the high energy density is achieved at an expense of non-sustainability. The replacement of Li+ with cheaper monovalent ions enables to make greener battery alternatives. The utilization of polyvalent ions instead of Li+ permits to multiplying the battery capacity. Contrary to Li+ , the realization of quick and reversible intercalation of bigger monovalent and of polyvalent ions is a scientific challenge due to kinetic constraints, polarizing ion effects and Coulomb interactions...
August 17, 2018: Chemical Record: An Official Publication of the Chemical Society of Japan ... [et Al.]
Jasmin S Hanke, Julia Riebandt, Miena Wahabzada, Fatma Nur, Angela Wahabzada, Günes Dogan, Christina Feldmann, Axel Haverich, Aron-Friedrich Popov, Daniel Zimpfer, Jan D Schmitto
Literature on driving capacities of ventricular assist device patients is rare and driving restrictions differ from center to center. Currently, no guidelines exist on whether and when left ventricular assist device (LVAD) patients are allowed to begin driving cars after device implantation. In this study, we assess the driving abilities of patients after LVAD implantation. Three hundred and ninety LVAD patients have been surveyed in a worldwide, multicenter study. The single survey followed a multi-method design, including online, phone, and face-to-face interviews...
July 2018: Artificial Organs
Paurush Ambesh, Aditya Kapoor
The sinoatrial (SA) node is the dominant pacemaker of the heart which initiates the process of impulse generation in the cardiac tissue, thereby defining the rate and rhythm of cardiac contraction. The automaticity of the conduction cells in the SA node is due to ion channels which are inter-linked by molecular, histological and electrophysiological mechanisms causing spontaneous diastolic depolarization and generation of an impulse. The SA nodal action potentials are then transmitted to the ventricles by electrical coupling of the myocytes in different areas of the heart...
November 2017: National Medical Journal of India
Yun Kyung Shin, Mert Y Sengul, A S M Jonayat, Wonho Lee, Enrique D Gomez, Clive A Randall, Adri C T van Duin
We developed a ReaxFF reactive force field for NASICON-type Li1+xAlxTi2-x(PO4)3 (LATP) materials, which is a promising solid-electrolyte that may enable all-solid-state lithium-ion batteries. The force field parameters were optimized based on density functional theory (DFT) data, including equations of state and the heats of formation of ternary metal oxides and metal phosphate crystal phases (e.g., LixTiO2, Al2TiO5, LiAlO2, AlPO4, Li3PO4 and LiTi2(PO4)3 (LTP)), and the energy barriers for Li diffusion in TiO2 and LTP via vacancies and interstitial sites...
August 17, 2018: Physical Chemistry Chemical Physics: PCCP
Tao Bo, Peng-Fei Liu, Juping Xu, Junrong Zhang, Yuanbo Chen, Olle Eriksson, Fangwei Wang, Bao-Tian Wang
Combining the first-principles density functional method and crystal structure prediction techniques, we report a series of hexagonal two-dimensional transition metal borides including Sc2B2, Ti2B2, V2B2, Cr2B2, Y2B2, Zr2B2, and Mo2B2. Their dynamic and thermal stabilities are testified by phonon and molecular dynamics simulations. We investigate the potential of the two-dimensional Ti2B2 monolayer as an anode material for Li-ion and Na-ion batteries. The Ti2B2 monolayer possesses high theoretical specific capacities of 456 and 342 mA h g-1 for Li and Na, respectively...
August 17, 2018: Physical Chemistry Chemical Physics: PCCP
Y Zhang, G-J Shan, Y-X Zhang, S-J Cao, S-N Zhu, H-J Li, D Ma, D-X Wang
BACKGROUND: The choice of general anaesthetics may affect postoperative cognitive outcomes. This study was designed to compare the potential impact of propofol-based vs sevoflurane-based general anaesthesia on the development of delayed neurocognitive recovery in older adults early after major cancer surgery. METHODS: Older adults (aged ≥65 and <90 yr) who were scheduled to undergo major cancer surgery (≥2 h) were randomised to receive either propofol- or sevoflurane-based general anaesthesia...
September 2018: British Journal of Anaesthesia
Xiaobo Ji, Wei Xu, YiGe Zhou
The Li ion desertion process of single LiFePO4 particle with a diameter of 400 nm in aqueous media at high potential is investigated by stochastic collision of particle at a microelectrode. No extra additive such as polymeric binder and conductive carbon is involved in this stochastic measurement. The ion diffusion inside the particle is proved to be the rate-determining step which limit the discharge rate of batteries using LiFePO4 in an aqueous environment.This result offers help to explore the most effective promotion of Li ion batteries...
August 16, 2018: Journal of Physical Chemistry Letters
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