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Su-Chan Park
We investigate the origin of the difference, which was noticed by Fey et al. [Phys. Rev. Lett. 104, 145703 (2010)PRLTAO0031-900710.1103/PhysRevLett.104.145703], between the steady state density of an Abelian sandpile model (ASM) and the transition point of its corresponding deterministic fixed-energy sandpile model (DFES). Being deterministic, the configuration space of a DFES can be divided into two disjoint classes such that every configuration in one class should evolve into one of absorbing states, whereas no configurations in the other class can reach an absorbing state...
March 2018: Physical Review. E
Sungmin Han, Jun-Uk Chu, Jong Woong Park, Inchan Youn
Proprioceptive afferent activities recorded by a multichannel microelectrode have been used to decode limb movements to provide sensory feedback signals for closed-loop control in a functional electrical stimulation (FES) system. However, analyzing the high dimensionality of neural activity is one of the major challenges in real-time applications. This paper proposes a linear feature projection method for the real-time decoding of ankle and knee joint angles. Single-unit activity was extracted as a feature vector from proprioceptive afferent signals that were recorded from the L7 dorsal root ganglion during passive movements of ankle and knee joints...
May 15, 2018: Journal of Computational Neuroscience
Mark C Weir, Sherry T Shu, Ravi K Patel, Sabine Hellwig, Li Chen, Li Tan, Nathanael S Gray, Thomas E Smithgall
Acute myelogenous leukemia (AML) is the most common hematologic malignancy in adults, and is often associated with constitutive tyrosine kinase signaling. These pathways involve the non-receptor tyrosine kinases Fes, Syk and the three Src-family kinases expressed in myeloid cells (Fgr, Hck, and Lyn). In this study, we report remarkable anti-AML efficacy of an N-phenylbenzamide kinase inhibitor, TL02-59. This compound potently suppressed the proliferation of bone marrow samples from twenty of twenty-six AML patients, with a striking correlation between inhibitor sensitivity and expression levels of the myeloid Src family kinases Fgr, Hck, and Lyn...
May 15, 2018: ACS Chemical Biology
Rogéria Gonçalves de Carvalho Fonseca, Andreia Maria Silva, Luiza Faria Teixeira, Valéria Regina Silva, Luciana Maria Dos Reis, Adriana Teresa Silva Santos
OBJECTIVE: To analyze the effect of auricular acupoint associated with physical exercise on balance, mobility and fear of falling in the elderly. METHOD: The study is characterized as a clinical, controlled and randomized trial with 22 elderly sampled divided into two groups: kinesiotherapy group (KG, n = 11) and kinesiotherapy/auriculotherapy group (AKG, n = 11). The instruments used for evaluation were Falls Efficacy Scale International (FES-I); Berg Balance Scale (BBS) and Timed up and Go Test (TUG)...
May 10, 2018: Journal of Acupuncture and Meridian Studies
Edmund F Hodkin, Yuming Lei, Jonathan Humby, Isabel S Glover, Supriyo Choudhury, Hrishikesh Kumar, Monica A Perez, Helen Rodgers, Andrew Jackson
Neurorehabilitation aims to induce beneficial neural plasticity in order to restore function following injury to the nervous system. There is an increasing evidence that appropriately timed functional electrical stimulation (FES) can promote associative plasticity, but the dosage is critical for lasting functional benefits. Here, we present a novel approach to closed-loop control of muscle stimulation for the rehabilitation of reach-to-grasp movements following stroke and spinal cord injury (SCI). We developed a simple, low-cost device to deliver assistive stimulation contingent on users' self-initiated movements...
May 2018: IEEE Transactions on Neural Systems and Rehabilitation Engineering
Nikolai Lebedev, Igor Griva, Anders Blom, Leonard M Tender
Protein molecular conductance has attracted attention from researchers for the possibility of constructing innovative flexible biocompatible nanoscale electronic devices and smart hybrid materials. Due to protein complexity, most evaluations of protein conductivity are based on the simple estimation of protein's molecular orbital energy levels and spatial distributions without analysing its protein interaction with electrodes and the calculation of the rates of electron transfer (ET). In the present work, we included in our density functional theory (DFT) analysis an approach based on the non-equilibrium Green's function (NEGF) allowing for calculation from the first principles the molecular interaction with electrodes and thus the role of electrode materials, Fermi level, the thermal distribution of electronic energy levels, and the coupling efficiency between the molecule and the electrodes...
May 11, 2018: Physical Chemistry Chemical Physics: PCCP
Fraser A Armstrong, Rhiannon M Evans, Clare F Megarity
A suite of dynamic electrochemical techniques known as protein film electrochemistry (PFE) offers important insight into the roles of active sites in enzymes, including properties of electron-transfer centers (individually or collectively), rates and dependences of catalytic electron transport, and binding and dissociation of inhibitors. In this chapter, we explain how PFE is used to investigate the properties of FeS clusters-centers lacking distinctive or convenient spectroscopic signatures that are often very sensitive to O2 ...
2018: Methods in Enzymology
Xiaoxin Zhao, Jingjing Yao, Yiding Lv, Xinyue Zhang, Chongyang Han, Lijun Chen, Fangfang Ren, Zhuma Jin, Yuan Li, Yuxiu Sui
Several resting-state neuroimaging studies have indicated abnormal regional homogeneity (ReHo) in chronic schizophrenia; however, little work has been conducted to investigate naïve patients with first-episode schizophrenia (FES). Even less investigated is the association between ReHo measures and clinical symptom severity in naïve patients with FES. The current study evaluated ReHo alterations in whole brain, and assessed the correlations between ReHo measures and clinical variables in naïve patients with FES...
May 7, 2018: Brain Imaging and Behavior
Lisa Keay, Devarsetty Praveen, Abdul Salam, K V Rajasekhar, Anne Tiedemann, Vimala Thomas, Jagnoor Jagnoor, Cathie Sherrington, Rebecca Q Ivers
Background: Falls are an emerging public health issue in India, with the impact set to rise as the population ages. We sought to evaluate the acceptability, feasibility and likely impact of a yoga-based program aimed at improving balance and mobility for older residents in urban India. Methods: Fifty local residents aged 60 years and older were recruited from urban Hyderabad, Andhra Pradesh. They were invited to attend a 1-h yoga class, twice weekly for 3 months...
2018: Pilot and Feasibility Studies
Dongfang Wang, Guilong Zhang, Zhangyu Dai, Linglin Zhou, Po Bian, Kang Zheng, Zhengyan Wu, Dongqing Cai
In this work, a novel nano-system with sandwich-like structure was synthesized via face-to-face combination of two pieces of waste cotton fabrics (CFs) carrying ferrous sulfide (FeS) and carboxyl-functionalized ferroferric oxide (CFFM) respectively, and the obtained nano system was named as FeS/CFFM/CF. Therein, FeS has high reduction and adsorption capabilities for hexavalent chromium (Cr(VI)), CFFM possesses a high adsorption ability on cadmium ion (Cd(II)) through electrostatics attraction and chelation, and CF displays high immobilization ability for FeS and CFFM and adsorption performance on Cd(II)...
May 7, 2018: ACS Applied Materials & Interfaces
Cinthya Lourdes Toledo-Peral, Josefina Gutiérrez-Martínez, Jorge Airy Mercado-Gutiérrez, Ana Isabel Martín-Vignon-Whaley, Arturo Vera-Hernández, Lorenzo Leija-Salas
Due to damage of the nervous system, patients experience impediments in their daily life: severe fatigue, tremor or impaired hand dexterity, hemiparesis, or hemiplegia. Surface electromyography (sEMG) signal analysis is used to identify motion; however, standardization of electrode placement and classification of sEMG patterns are major challenges. This paper describes a technique used to acquire sEMG signals for five hand motion patterns from six able-bodied subjects using an array of recording and stimulation electrodes placed on the forearm and its effects over functional electrical stimulation (FES) and volitional sEMG combinations, in order to eventually control a sEMG-driven FES neuroprosthesis for upper limb rehabilitation...
2018: Journal of Healthcare Engineering
Anne-Kari Torgalsbøen, Susie Fu, Nikolai Czajkowski
BACKGROUND: Resilience is successful adaptation despite adversity. This personality trait has the potential to add new knowledge to how to achieve a successful outcome, but resilience has been understudied in schizophrenia. The objective of the present study is to investigate if there are significant differences in resilience development among fully recovered and non-recovered patients with first episode schizophrenia (FES). METHODS: In the ongoing Oslo Schizophrenia Recovery Study spanning 10 years, 28 first-episode patients are interviewed and assessed yearly with comprehensive criteria of full recovery, a measure of social and role functioning and resilience, the Connor-Davidson Resilience Scale...
May 3, 2018: European Psychiatry: the Journal of the Association of European Psychiatrists
Dorota Frydecka, Małgorzata Krzystek-Korpacka, Alba Lubeiro, Filip Stramecki, Bartłomiej Stańczykiewicz, Jan Aleksander Beszłej, Patryk Piotrowski, Kamila Kotowicz, Monika Szewczuk-Bogusławska, Edyta Pawlak-Adamska, Błażej Misiak
We aimed to profile a broad panel of inflammatory markers in patients with schizophrenia and healthy controls. Additionally, we performed a meta-analysis of chemokine alterations that have not been subjected to quantitative synthesis so far. We recruited 78 patients with schizophrenia and 78 healthy controls, and measured inflammatory markers using the Luminex technology. After adjustment for multiple testing, we found elevated levels of interleukin (IL)-1 receptor antagonist (IL-1RA), IL-6, IL-7, IL-8, IL-9, IL-10, IL-13, interferon-γ, eotaxin-1, granulocyte-macrophage colony-stimulating factor (GM-CSF), monocyte chemoattractant protein-1 (MCP-1), platelet-derived growth factor with two B subunits (PDGF-BB), macrophage inflammatory protein (MIP)-1α, MIP-1β, vascular endothelial growth factor A (VEGF-A) and RANTES in multiple-episode schizophrenia (MES) patients...
May 3, 2018: Brain, Behavior, and Immunity
Hongyan Wang, Bin Zhang, Botao Zeng, Yingying Tang, Tianhong Zhang, Shanshan Zhao, Chunbo Li, Jijun Wang, Donald C Goff
Dopamine in the prefrontal cortex (PFC) plays an important role in cognitive performance and regulates by catechol-O-methyltransferase (COMT) expression. To clarify the effect of COMT genotype on cognitive function in patients with schizophrenia, we performed DNA genotyping, cognitive evaluations, and functional magnetic resonance imaging (fMRI) in antipsychotic-naïve patients with first-episode schizophrenia (FES) and matched healthy control subjects. We found that all cognitive domains were impaired in patients with FES compared with healthy subjects...
May 3, 2018: Schizophrenia Research
Bao-Hua Hou, Ying-Ying Wang, Jin-Zhi Guo, Qiu-Li Ning, Xiao-Tong Xi, Wei-Lin Pang, An-Min Cao, Xinlong Wang, Jing-Ping Zhang, Xing-Long Wu
In order to develop promising anode materials for sodium-ion batteries (SIBs), a novel pie-like FeS@C (P-FeS@C) nanohybrid, in which all ultrasmall FeS nanocrystals (NCs) are completely embedded into the carbon network and sealed by a protective carbon shell, has been prepared. The unique pie-like structure can effectively speed up the kinetics of electrode reactions, while the carbon shell stabilizes the FeS NCs inside. Studies show that the electrochemical reaction processes of P-FeS@C electrodes are dominated by the pseudocapacitive behavior, leading to an ultrafast Na+-insertion/extraction reaction...
May 4, 2018: Nanoscale
Jun Wu, Raymond J Zeng
Iron sulfide (FeS) nanoparticles have been applied for selenite remediation in recent decades. However, the easy aggregation and oxidization of FeS nanoparticles hamper their reactivity during the process of pollutant removal. In this study, in situ immobilization technology was applied to prepare FeS nanoparticles-impregnated alginate composite (FeS-SA) beads for successful selenite remediation. Almost 100% of the selenite (0.13 mM) was removed by FeS-SA beads, whereas only 27% of the selenite was eliminated by pure non-stabilized FeS suspension and sodium alginate (SA) beads...
May 3, 2018: Environmental Science & Technology
Young Soo Han, Hoon Young Jeong, Sung Pil Hyun, Kim F Hayes, Chul Min Chon
During X-ray absorption spectroscopy (XAS) measurements of arsenic (As), beam-induced redox transformation is often observed. In this study, the As species immobilized by poorly crystallized mackinawite (FeS) was assessed for the susceptibility to beam-induced redox reactions as a function of sample properties including the redox state of FeS and the solid-phase As speciation. The beam-induced oxidation of reduced As species was found to be mediated by the atmospheric O2 and the oxidation products of FeS [e...
May 1, 2018: Journal of Synchrotron Radiation
Luke Berry, Angela Patterson, Natasha Pence, John W Peters, Brian Bothner
The protocol detailed here describes a way to perform hydrogen deuterium exchange coupled to mass spectrometry (HDX-MS) on oxygen sensitive proteins. HDX-MS is a powerful tool for studying the protein structure-function relationship. Applying this technique to anaerobic proteins provides insight into the mechanism of proteins that perform oxygen sensitive chemistry. A problem when using HDX-MS to study anaerobic proteins is that there are many parts that require constant movement into and out of an anaerobic chamber...
March 20, 2018: Bio-protocol
Marica Giardini, Antonio Nardone, Marco Godi, Simone Guglielmetti, Ilaria Arcolin, Fabrizio Pisano, Marco Schieppati
We hypothesised that rehabilitation specifically addressing balance in Parkinson's disease patients might improve not only balance but locomotion as well. Two balance-training protocols (standing on a moving platform and traditional balance exercises) were assessed by assigning patients to two groups (Platform, n = 15, and Exercises, n = 17). The platform moved periodically in the anteroposterior, laterolateral, and oblique direction, with and without vision in different trials. Balance exercises were based on the Otago Exercise Program...
2018: Neural Plasticity
Lene Halling Hastrup, Ulrik Helt Haahr, Julie Nordgaard, Erik Simonsen
BACKGROUND: In an effort to make people with signs of psychosis seek help as early as possible, Region Zealand launched in 2012 an early detection team project as the first and only in Denmark. The project consisted of a combination of easy access and an information campaign targeting the public. This nation-wide study examined characteristics and help-seeking behavior of patients with first-episode schizophrenia (FES) in the early detection region in comparison with other Danish regions...
April 26, 2018: Schizophrenia Research
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