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https://www.readbyqxmd.com/read/28441850/-clinical-application-of-one-stage-operation-of-epicardial-permanent-pacemaker-implantation-and-cardiac-surgery
#1
C L Ren, S L Jiang, C S Xiao, R Wang, C Q Gao
Objective: To summarize the results and clinical application experience of one-stage operation of epicardial permanent pacemaker implantation and cardiac surgery. Methods: From November 2014 to July 2016, 15 patients (9 males and 6 females) with ages ranging from 50 to 73 (63.5±6.2) years requiring cardiac surgery with bradycardia underwent one-stage operation of epicardial permanent pacemaker implantation and cardiac surgery. All operations were performed under general anesthesia with chest median incision approach...
April 25, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28441740/a-miniature-aerosol-sensor-for-detecting-polydisperse-airborne-ultrafine-particles
#2
Chao Zhang, Dingqu Wang, Rong Zhu, Wenming Yang, Peng Jiang
Counting and sizing of polydisperse airborne nanoparticles have attracted most attentions owing to increasing widespread presence of airborne engineered nanoparticles or ultrafine particles. Here we report a miniature aerosol sensor to detect particle size distribution of polydisperse ultrafine particles based on ion diffusion charging and electrical detection. The aerosol sensor comprises a couple of planar electrodes printed on two circuit boards assembled in parallel, where charging, precipitation and measurement sections are integrated into one chip, which can detect aerosol particle size in of 30-500 nm, number concentration in range of 5 × 10²-10⁷ /cm³...
April 22, 2017: Sensors
https://www.readbyqxmd.com/read/28441637/subtle-pathological-changes-in-neocortical-temporal-lobe-epilepsy
#3
Juan G Ochoa, Diana Hentgarden, Audrey Paulzak, Melissa Ogden, Richard Pryson, Markus Lamle, Walter G Rusyniak
This was a prospective observational study to correlate the clinical symptoms, electrophysiology, imaging, and surgical pathology of patients with temporal lobe epilepsy (TLE) without hippocampal sclerosis. We selected consecutive patients with TLE and normal MRI undergoing temporal lobe resection between April and September 2015. Clinical features, imaging, and functional data were reviewed. Intracranial monitoring and language mapping were performed when it was required according to our team recommendation...
April 22, 2017: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/28441500/thermoplasmonic-semitransparent-nanohole-electrodes
#4
Daniel Tordera, Dan Zhao, Anton V Volkov, Xavier Crispin, Magnus P Jonsson
Non-radiative decay of plasmons in metallic nanostructures offers unique means for light-to-heat conversion at the nanoscale. Typical thermoplasmonic systems utilize discrete particles, while metal nanohole arrays were instead considered suitable as heat sinks to reduce heating effects. By contrast, we show for the first time that, under uniform broadband illumination (e.g. the sun), ultrathin plasmonic nanohole arrays can be highly competitive plasmonic heaters and provide significantly higher temperatures than analogous nanodisk arrays...
April 25, 2017: Nano Letters
https://www.readbyqxmd.com/read/28441238/diaphragm-activation-in-ventilated-patients-using-a-novel-transvenous-phrenic-nerve-pacing-catheter
#5
Steven Reynolds, Adrian Ebner, Tracy Meffen, Viral Thakkar, Matt Gani, Kaity Taylor, Linda Clark, Gautam Sadarangani, Ramasamy Meyyappan, Rodrigo Sandoval, Elizabeth Rohrs, Joaquín A Hoffer
OBJECTIVES: Over 30% of critically ill patients on positive-pressure mechanical ventilation have difficulty weaning from the ventilator, many of whom acquire ventilator-induced diaphragm dysfunction. Temporary transvenous phrenic nerve pacing using a novel electrode-bearing catheter may provide a means to prevent diaphragm atrophy, to strengthen an atrophied diaphragm, and mitigate the harms of mechanical ventilation. We tested the initial safety, feasibility, and impact on ventilation of this novel approach...
April 22, 2017: Critical Care Medicine
https://www.readbyqxmd.com/read/28441144/highly-efficient-inverted-organic-light-emitting-diodes-by-inserting-zinc-oxide-polyethyleneimine-zno-pei-nano-composite-interfacial-layer
#6
Rifat Kaçar, Selin Mucur, Fikret Yildiz, Salih Dabak, Emine Tekin
The electrode/organic interface is one of the crucial key factor to attain superior device performance in organic electronics, and inserting a tailor-made layer can dramatically modify its properties. Using of nano-composite (NC) materials lead to many advantages by combining the materials with the objective of getting desirable combination of properties. In this context, zinc oxide/polyethyleneimine (ZnO:PEI) NC film was incorporated as the interfacial layer into the inverted bottom-emission organic light emitting diodes (IBOLEDs) and fully optimized...
April 25, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28440788/multi-layered-hierarchical-nanostructures-for-transparent-monolithic-dye-sensitized-solar-cell-architectures
#7
Luca Passoni, Francesco Fumagalli, Andrea Perego, Sebastiano Bellani, Piero Mazzolini, Fabio di Fonzo
Monolithic dye sensitized solar cell architectures hold great potential for building integrated photovoltaics applications. They indeed benefit from lower weight and manufacturing costs as they avoid the use of a transparent conductive oxide coated glass counter electrode. In this work a transparent monolithic dye-sensitized solar cell comprising hierarchical 1D nanostructures stack is fabricated by physical vapour deposition techniques. The proof of concept device comprises hyperbranched TiO<sub>2 </sub> nanostructures, sensitized by the prototypical N719, as photoanode, a hierarchical nanoporous Al<sub>2 </sub>O<sub>3 </sub> spacer and a microporous ITO top electrode...
April 25, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28440629/relevant-features-of-a-triethylene-glycol-dimethyl-ether-based-electrolyte-for-application-in-lithium-battery
#8
Lorenzo Carbone, Daniele Di Lecce, Mallory Gobet, Stephen Munoz, Matthew Devany, Steve Greenbaum, Jusef Hassoun
Triethylene glycol dimethyl ether (TREGDME) dissolving lithium trifluoromethane sulfonate (LiCF3SO3) is studied as a suitable electrolyte medium for lithium battery. Thermal and rheological characteristics, transport properties of the dissolved species, and the electrochemical behavior in lithium cell represent the most relevant investigated properties of the new electrolyte. The self-diffusion coefficients, the lithium transference numbers, the ionic conductivity, and the ion association degree of the solution are determined by pulse field gradient nuclear magnetic resonance and electrochemical impedance spectroscopy...
April 25, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28440567/dawson-type-polyoxomolybdate-anions-p2mo18o626-captured-by-ionic-liquid-on-graphene-oxide-as-high-capacity-anode-material-for-lithium-ion-batteries
#9
Yu-Fei Song, Jun Hu, Hongling Diao, Wenjing Luo
The development of advanced anode materials is of significance for the next generation of lithium ion batteries (LIBs). Herein, the imidazolium-based ionic liquids (ILs) was covalently grafted on the surface of graphene oxides (GO) via the carboxyl-amino bond,providing a loading hotbed for the Dawson-type POM of (NH4)6P2Mo18O62 (denoted as P2Mo18). The as-prepared GO-IL-P2Mo18 nanocomposite was characterized by FT-IR, Raman, TGA, SEM, TEM and XPS. When the nanocomposite was used as the anode material for lithium ion batteries (LIBs), it showed a high reversible capacity of 903...
April 25, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28440384/theoretical-and-numerical-analysis-of-nano-actuators-based-on-grafted-polyelectrolytes-in-an-electric-field
#10
N V Brilliantov, Yu A Budkov, C Seidel
We analyze, theoretically and by means of molecular dynamics (MD) simulations, the generation of mechanical force by a polyelectrolyte (PE) chain grafted to a plane and exposed to an external electric field; the free end of the chain is linked to a deformable target body. Varying the field, one can alter the length of the non-adsorbed (bulk) part of the chain and hence the deformation of the target body and the arising force. We focus on the impact of added salt on the magnitude of the generated force, which is especially important for applications...
April 25, 2017: Faraday Discussions
https://www.readbyqxmd.com/read/28440379/high-voltage-positive-electrode-materials-for-lithium-ion-batteries
#11
REVIEW
Wangda Li, Bohang Song, Arumugam Manthiram
The ever-growing demand for advanced rechargeable lithium-ion batteries in portable electronics and electric vehicles has spurred intensive research efforts over the past decade. The key to sustaining the progress in Li-ion batteries lies in the quest for safe, low-cost positive electrode (cathode) materials with desirable energy and power capabilities. One approach to boost the energy and power densities of batteries is to increase the output voltage while maintaining a high capacity, fast charge-discharge rate, and long service life...
April 25, 2017: Chemical Society Reviews
https://www.readbyqxmd.com/read/28440299/a-reversible-dendrite-free-high-areal-capacity-lithium-metal-electrode
#12
Hui Wang, Masaki Matsui, Hiroko Kuwata, Hidetoshi Sonoki, Yasuaki Matsuda, Xuefu Shang, Yasuo Takeda, Osamu Yamamoto, Nobuyuki Imanishi
Reversible dendrite-free low-areal-capacity lithium metal electrodes have recently been revived, because of their pivotal role in developing beyond lithium ion batteries. However, there have been no reports of reversible dendrite-free high-areal-capacity lithium metal electrodes. Here we report on a strategy to realize unprecedented stable cycling of lithium electrodeposition/stripping with a highly desirable areal-capacity (12 mAh cm(-2)) and exceptional Coulombic efficiency (>99.98%) at high current densities (>5 mA cm(-2)) and ambient temperature using a diluted solvate ionic liquid...
April 25, 2017: Nature Communications
https://www.readbyqxmd.com/read/28440238/thermal-ablation-of-pancreatic-cyst-with-a-prototype-endoscopic-ultrasound-capable-radiofrequency-needle-device-a-pilot-feasibility-study
#13
Maria Moris, Mustafa Atar, Abdurrahman Kadayifci, Murli Krishna, Ariston Librero, Eugene Richie, William Brugge, Michael B Wallace
BACKGROUND AND OBJECTIVES: Pancreatic cysts are evaluated by endoscopic ultrasound and fine needle aspiration (EUS). The only accepted treatment is pancreatectomy, which is associated with morbidity and mortality. This study evaluated the optimal thermal dosimetry of a novel radiofrequency ablation device using a standard electrosurgical unit in ex vivo cyst models. METHODS: A modified EUS 22-gauge monopolar needle prototype with a tip electrode connected to a standard electrosurgical unit (Erbe USA, Marietta, GA, USA) was used to induce a subboiling point temperature...
March 2017: Endoscopic Ultrasound
https://www.readbyqxmd.com/read/28440058/atypical-inter-hemispheric-communication-correlates-with-altered-motor-inhibition-during-learning-of-a-new-bimanual-coordination-pattern-in-developmental-coordination-disorder
#14
Mélody Blais, David Amarantini, Jean-Michel Albaret, Yves Chaix, Jessica Tallet
Impairment of motor learning skills in developmental coordination disorder (DCD) has been reported in several studies. Some hypotheses on neural mechanisms of motor learning deficits in DCD have emerged but, to date, brain-imaging investigations are scarce. The aim of the present study is to assess possible changes in communication between brain areas during practice of a new bimanual coordination task in teenagers with DCD (n = 10) compared to matched controls (n = 10). Accuracy, stability and number of mirror movements were computed as behavioural variables...
April 25, 2017: Developmental Science
https://www.readbyqxmd.com/read/28440034/role-of-transcranial-direct-current-stimulation-on-reduction-of-postsurgical-opioid-consumption-and-pain-in-total-knee-arthroplasty-double-randomized-clinical-trial
#15
E M Khedr, E S A Sharkawy, A M A Attia, N M Ibrahim Osman, Z M Sayed
BACKGROUND: Postoperative pain control is an important factor in determining recovery in total knee arthroplasty (TKA).The aim of the study was to assess the efficacy of 4 sessions of transcranial direct current stimulation (tDCS) over primary motor cortex (M1) in patients undergoing unilateral TKA. MATERIALS: Fifty patients undergoing TKA were included in the study. They were divided randomly into two groups (25 patients for each, using closed envelopes): real tDCS (2 mA, 20 min, with anodal stimulation applied over M1 postoperative for 4 consecutive days) and sham tDCS...
April 25, 2017: European Journal of Pain: EJP
https://www.readbyqxmd.com/read/28440020/interconnected-3d-network-of-carbon-dots-decorated-reduced-graphene-oxide-nanosheets-for-high-performance-supercapacitors
#16
Mingtao Zheng, Xiao Zhao, Ming Li, Hanwu Dong, Yingliang Liu, Hang Hu, Yijin Cai, Yeru Liang, Yong Xiao
Interconnected 3D network of reduced graphene oxide decorated with carbon dots (rGO/CDs) nanosheets are successfully fabricated via a simple one-pot hydrothermal process. The as-prepared rGO/CDs present appropriate 3D interconnected structure and abundant oxygen-containing functional groups, which attribute to excellent electrochemical performance such as high specific capacitance, good rate capability, and great cycling stability. Employed as binder-free electrodes for supercapacitor, the as-resulted rGO/CDs exhibit excellent long-term cycling stability (ca...
April 24, 2017: ChemSusChem
https://www.readbyqxmd.com/read/28439926/multi-nonvolatile-state-resistive-switching-arising-from-ferroelectricity-and-oxygen-vacancy-migration
#17
Weiming Lü, Changjian Li, Limei Zheng, Juanxiu Xiao, Weinan Lin, Qiang Li, Xiao Renshaw Wang, Zhen Huang, Shengwei Zeng, Kun Han, Wenxiong Zhou, Kaiyang Zeng, Jingsheng Chen, Ariando, Wenwu Cao, Thirumalai Venkatesan
Resistive switching phenomena form the basis of competing memory technologies. Among them, resistive switching, originating from oxygen vacancy migration (OVM), and ferroelectric switching offer two promising approaches. OVM in oxide films/heterostructures can exhibit high/low resistive state via conducting filament forming/deforming, while the resistive switching of ferroelectric tunnel junctions (FTJs) arises from barrier height or width variation while ferroelectric polarization reverses between asymmetric electrodes...
April 25, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28439233/concealed-unobtrusive-ear-centered-eeg-acquisition-ceegrids-for-transparent-eeg
#18
Martin G Bleichner, Stefan Debener
Electroencephalography (EEG) is an important clinical tool and frequently used to study the brain-behavior relationship in humans noninvasively. Traditionally, EEG signals are recorded by positioning electrodes on the scalp and keeping them in place with glue, rubber bands, or elastic caps. This setup provides good coverage of the head, but is impractical for EEG acquisition in natural daily-life situations. Here, we propose the transparent EEG concept. Transparent EEG aims for motion tolerant, highly portable, unobtrusive, and near invisible data acquisition with minimum disturbance of a user's daily activities...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28439085/a-high-power-and-fast-charging-li-ion-battery-with-outstanding-cycle-life
#19
M Agostini, S Brutti, M A Navarra, S Panero, P Reale, A Matic, B Scrosati
Electrochemical energy storage devices based on Li-ion cells currently power almost all electronic devices and power tools. The development of new Li-ion cell configurations by incorporating innovative functional components (electrode materials and electrolyte formulations) will allow to bring this technology beyond mobile electronics and to boost performance largely beyond the state-of-the-art. Here we demonstrate a new full Li-ion cell constituted by a high-potential cathode material, i.e. LiNi0.5Mn1.5O4, a safe nanostructured anode material, i...
April 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28438529/an-erp-investigation-of-vertical-reading-fluency-in-scrabble-%C3%A2-experts
#20
Sophia van Hees, Sabine Seyffarth, Penny M Pexman, Filomeno Cortese, Andrea B Protzner
Previous studies have found that competitive Scrabble expertise is associated with enhanced performance on visual lexical decision tasks (LDT), particularly for vertically presented stimuli. In the current study, we investigated the underlying mechanisms responsible for this vertical fluency. We examined behaviour and neural activity during LDT in 19 competitive Scrabble players and 18 matched controls. Using event related potentials (ERP), we investigated whether Scrabble expertise modulates the N170, P300, and late positive component (LPC), associated with visual-orthographic processing, working memory, and stimulus classification, respectively...
April 21, 2017: Brain Research
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