bluuebunny/crossref_metadata_2025_split huggingface dataset:
Sensor Properties of Pristine and Functionalized Carbon Nanohorns
Authors: Valentini Federica , Ciambella Elena , Boaretto Aldrei , Rizzitelli Giuseppe , Carbone Marilena , Conte Valeria , Cataldo Franco , Russo Valeria , Casari Carlo Spartaco , Chillura‐Martino Delia Francesca , Caponetti Eugenio , Bonchio Marcella , Giacalone Francesco , Syrgiannis Zois , Prato Maurizio 
Published: June 2016

AbstractNanodispersions of pristine single‐wall carbon nanohorns (i.e., p‐SWCNHs) and oxidized‐SWCNHs (i.e.; o‐SWCNHs) were used to modify screen printed electrode (SPE). p‐SWCNHs and o‐SWCNHs were fully characterized by using several analytical techniques, as: HR‐TEM (High Resolution‐Transmission Electron Microscopy), FE‐SEM/EDX (Field Emission‐Scanning Electron Microscopy/Energy Dispersive X‐ray Analysis), Raman spectroscopy, thermogravimetric analysis, differential thermal analysis (DTA), and the Brunauer‐Emmett‐Teller (BET) method. The chemically modified SPEs were also characterized with Cyclic Voltammetry (CV), using several different electro‐active targets. In all cases, p‐SWCNHs showed better performances than those obtained for o‐SWCNHs as well as with respect to conventional Glassy Carbon (GC) electrodes, in terms of peak currents, significant shift at lower redox‐potential ranges and enhanced heterogeneous apparent kinetic constants.
Electrocatalytic Activities of Graphene/Nile Blue Nanocomposite Toward Determination of Hydrogen Peroxide and Nitrite Ion
Authors: Shervedani Reza Karimi , Ansarifar Elham , Foroushani Marzieh Samiei 
Published: June 2016

AbstractElectrocatalytic activities of graphene nanosheets/Nile blue nanocomposite, synthesized and adsorbed simultaneously on the glassy carbon (GC−GNs−NB) electrode, are investigated. The nanocomposite was characterized by ATR−FTIR, FESEM and voltammetry. Activity of the electrode toward reduction of H2O2 and oxidation of NO2− was studied electrochemically. Values of 1.95 and 0.730 mM are found for the Michaelis−Menten constant of the electrode toward H2O2 and NO2−, respectively. Wide dynamic response ranges were observed for the electrode, with DLs of 0.22 μM H2O2 and 1.1 μM NO2−. Effect of interferences was studied. The sensor was successfully tested for H2O2 and NO2− contents in real samples, respectively.
Flow in a Paper‐based Bioactive Channel – Study on Electrochemical Detection of Glucose and Uric Acid
Authors: WitkowskaNery Emilia , Santhiago Murilo , Kubota Lauro T. 
Published: June 2016

AbstractAlthough paper‐based analysis is known for centuries, only during the last decade this simple substrate became an object of detailed microfluidic studies. In order to obtain optimum performance and separation of the analytes in a microfluidic channel, devices should be optimized, both in terms of architecture and paper properties. Enzyme immobilization methods can not only increase the storage stability but also have an impact on the flow in paper matrix, providing additional charges, and changing the porous structure of paper. Therefore it should be guaranteed that the method of choice will not obstruct the flux in the final device. Paper‐based device proposed in this study was composed of a bioactive channel, Pt working electrode, pencil drawn pseudo‐reference electrode, a buffer filled sponge providing the wicking solution and a stack of wicking pads to guarantee continuous flow. Based on our previous research we chose 4 methods of enzyme immobilization relying on different phenomena (adsorption, covalent linkage, layer‐by‐layer, capsules). Different channel architectures were also evaluated in order to achieve optimum time of the enzymatic reaction, separation of peaks and the time of measurement. Experimental results were compared with computer simulations. Final device could quantify glucose (2.0–10.0 mmol L−1) and uric acid (0.1–1.2 mmol L−1) in their clinical range with good repeatability.
Ordered Mesoporous Carbon/Titanium Carbide Composites as Support Materials for Platinum Catalysts
Authors: Zhao Gang , Zhao Tianshou , Yan Xiaohui , Zeng Lin , Xu Jianbo 
Published: June 2016

AbstractOrdered mesoporous carbon/titanium carbide composites (OMC/TiC) are synthesized by using Pluronic F127 and titanium isoproxide as the structure‐directing agent and titanium precursor. Characterizations confirm the formation of an ordered mesoporous textural structure and the formation of nanocrystals of TiC in the framework of carbon. By using the resultant OMC/TiC as the support material, a platinum catalyst (Pt/OMC/TiC) is then prepared. Electrochemical measurements show that a higher activity for the methanol oxidization reaction and oxygen reduction reaction can be observed for the Pt/OMC/TiC, compared to Pt/OMC and a commercial Pt/C catalyst. The results obtained in the present work suggest that the synthesized OMC/TiC is a promising support material for platinum catalysts in proton exchange membrane fuel cells and direct methanol fuel cells.
Experimental Study on the Characteristics of Ignition during Microwave Drying of Lignite
Authors: Song Zhanlong , Yao Liansheng , Jing Chuanming , Zhao Xiqiang , Wang Wenlong , Mao Yanpeng , Ma Chunyuan 
Published: June 2016

AbstractThe spontaneous combustion of lignite during microwave drying was evaluated with the focus on the effects of, for example, microwave power and output mode, the final temperature of the samples, and the oxygen content of the drying atmosphere on the moisture contents corresponding to the ignition (IMCs). This empirical study was performed using a laboratory‐scale microwave oven. The lowest IMCs and the optimal drying effect of lignite were achieved using a power level of 60 W g−1, final surface temperature of 85–90 °C, and a lower oxygen content; pulsed microwave radiation could significantly lower the risk of ignition by reducing the overall surface temperature. In addition, the ignition temperatures at different moisture contents were measured comparatively by using conventional and microwave heating methods. Fourier transform infrared analyses of the samples revealed that microwave drying can upgrade the coal rank without affecting the coal quality.
Seismic retrofit of reinforced concrete frames using buckling‐restrained braces with bearing block load transfer mechanism
Authors: Pan Kuan‐Yu , Wu An‐Chien , Tsai Keh‐Chyuan , Li Chao‐Hsien , Khoo Hsen‐Han 
Published: June 2016

SummaryA new method of retrofitting reinforced concrete (RC) frames with buckling‐restrained braces (BRBs) to improve frame strength, stiffness and energy dissipation is proposed. Instead of typical post‐installed anchors, load is transferred between the BRB and RC frame through compression bearing between an installed steel frame connected to the BRB, and high‐strength mortar blocks constructed at the four corners of the RC frame. This avoids complex on‐site anchor installation, and does not limit the allowable brace force by the anchor strength. Cyclic displacements of increasing amplitudes were imposed on two RC frame specimens retrofitted with different BRB strength capacities. In one of the frames, the bearing blocks were reinforced with wire mesh to mitigate cracking. A third RC frame was also tested as a benchmark to evaluate the retrofit strength and stiffness enhancements. Test results indicate that the proposed method efficiently transferred loads between the BRBs and RC frames, increasing the frame lateral strength while achieving good ductility and energy‐dissipating capacity. When the bearing block was reinforced with wire mesh, the maximum frame lateral strength and stiffness were more than 2.2 and 3.5 times the RC frame without the BRB respectively. The BRB imposes additional shear demands through the bearing blocks to both ends of the RC beam and column member discontinuity regions (D‐regions). The softened strut‐and‐tie model satisfactorily estimated the shear capacities of the D‐regions. A simplified calculation and a detailed PISA3D analysis were shown to effectively predict member demands to within 13.8% difference of the measured test results. Copyright © 2016 John Wiley & Sons, Ltd.
Influence of connection typology on seismic response of MR‐Frames with and without ‘set‐backs’
Authors: Montuori Rosario , Nastri Elide , Piluso Vincenzo , Troisi Marina 
Published: June 2016

SummaryThe work presented is aimed at the investigation of the influence of beam‐to‐column connections on the seismic response of MR‐Frames, with and without ‘set‐backs’, designed according to the Theory of Plastic Mechanism Control. The investigated connection typologies are four partial strength connections whose structural details have been designed to obtain the same flexural resistance. The first three joints are designed by means of hierarchy criteria based on the component approach and are characterized by different location of the weakest joint component, leading to different values of joint rotational stiffness and plastic rotation supply and affecting the shape of the hysteresis loops governing the dissipative capacity. The last typology is a beam‐to‐column connection equipped with friction pads devoted to the dissipation of the earthquake input energy, thus preventing the connection damage. An appropriate modelling is needed to accurately represent both strength and deformation characteristics, especially with reference to partial‐strength connections where the dissipation of the earthquake input energy occurs. To this aim, beam‐to‐column joints are modelled by means of rotational inelastic springs located at the ends of the beams whose moment‐rotation curve is characterized by a cyclic behaviour which accounts for stiffness and strength degradation and pinching phenomena. The parameters characterizing the cyclic hysteretic behaviour have been calibrated on the base of experimental results aiming to the best fitting. Successively, the prediction of the structural response of MR‐Frames, both regular frames and frames with set‐backs, equipped with such connections has been carried out by means of both push‐over and Incremental Dynamic Analyses. Copyright © 2016 John Wiley & Sons, Ltd.
Influence of earthquake ground‐motion duration on damage estimation: application to steel moment resisting frames
Authors: Barbosa Andre R. , Ribeiro Filipe L. A. , Neves Luis A. C. 
Published: June 2016

SummaryThis paper presents an analytical study evaluating the influence of ground motion duration on structural damage of 3‐story, 9‐story, and 20‐story SAC steel moment resisting frame buildings designed for downtown Seattle, WA, USA, using pre‐Northridge codes. Two‐dimensional nonlinear finite element models of the buildings are used to estimate the damage induced by the ground motions. A set of 44 ground motions is used to study the combined effect of spectral acceleration and ground motion significant duration on drift and damage measures. In addition, 10 spectrally equivalent short‐duration shallow crustal ground motions and long‐duration subduction zone records are selected to isolate duration effect and assess its effect on the response. For each ground motion pair, incremental dynamic analyses are performed at at least 20 intensity levels and response measures such as peak interstory drift ratio and energy dissipated are tracked. These response measures are combined into two damage metrics that account for the ductility and energy dissipation. Results indicate that the duration of the ground motion influences, above all, the combined damage measures, although some effect on drift‐based response measures is also observed for larger levels of drift. These results indicate that because the current assessment methodologies do not capture the effects of ground motion duration, both performance‐based and code‐based assessment methodologies should be revised to consider damage measures that are sensitive to duration. Copyright © 2016 John Wiley & Sons, Ltd
The Influence of Temperature and Composition on the Operation of Al Anodes for Aluminum‐Air Batteries
Authors: Ilyukhina A. V. , Zhuk A. Z. , Kleymenov B. V. , Ilyukhin A. S. , Nagayama M. 
Published: June 2016

AbstractThe influence of composition and temperature on the anode polarization and corrosion rate of pure Al and Al‐In anodic alloys in 8M NaON electrolyte has been investigated. High current density (more than 800 mA cm−2) and faradaic efficiency over 97% were observed for all investigated alloys at 60 °C. Lower temperature provides lower current density (200–300 mA cm−2 at 40 °C, and less than 100 mA cm−2 at 25 °C). Different formation of the product reaction layers was observed for pure aluminum and Al–0.41In alloy, leading to the different polarization character of the samples.The comparison of two Al‐In alloys with similar composition has been carried out. Al–0.45In alloy having a coarse‐grained structure had a more positive no‐current potential and lower value of anode limiting current (200 mA cm−2 vs. 300 mA cm−2) compared with the fine‐grained Al–0.41In alloy, as well as greater parasitic corrosion rate and greater no‐current corrosion.The current‐voltage, power and discharge characteristics of the aluminum‐air cell with Al–0.41In anode and gas diffusion cathode have been investigated. Open circuit voltage of the cell is 1.934 V and the maximum power density of the cell is 240 mW cm−2 at the voltage of 1.3 V.
Carbon Nanotubes and Nanohorn Hybrid Composite Buckypaper as Microporous Layer for Proton Exchange Membrane Fuel Cell
Authors: Ebenezer D. , Neelima K. , Jagannatham M. , Haridoss P. 
Published: June 2016

AbstractIn the present work, carbon nanotubes (CNT) and CNT‐carbon nanohorns (CNH) (0, 30, 50, 70 and 100 wt.% CNH) composite Buckypapers (BPs) were fabricated using vacuum filtration technique. Structure and property relation of composite BPs were studied using scanning electron microscope, four probe technique, BET surface area and contact angle measurements. Properties such as electrical conductivity, hydrophobic nature and microstructure of CNT‐30 wt.% CNH composite BP are superior to other composite BP. Hence, CNT‐30 wt.% CNH composite BP is chosen as a microporous layer (MPL) for PEMFCs and tested in fuel cell testing fixture. Polarization studies reveal that the cells performance with composite BPs is comparable with SGL‐MPL based cell. Hydrogen pumping and polarization studies of the cells confirms that composite BPs act as a good MPL at anode as well as cathode at 0.4 to 0.8 V. Hence, CNT‐CNH composite BPs are potential candidates for PEMFC applications.
Analyzing Association Mapping in Pedigree‐Based GWAS Using a Penalized Multitrait Mixed Model
Authors: Liu Jin , Yang Can , Shi Xingjie , Li Cong , Huang Jian , Zhao Hongyu , Ma Shuangge 
Published: June 2016

ABSTRACTGenome‐wide association studies (GWAS) have led to the identification of many genetic variants associated with complex diseases in the past 10 years. Penalization methods, with significant numerical and statistical advantages, have been extensively adopted in analyzing GWAS. This study has been partly motivated by the analysis of Genetic Analysis Workshop (GAW) 18 data, which have two notable characteristics. First, the subjects are from a small number of pedigrees and hence related. Second, for each subject, multiple correlated traits have been measured. Most of the existing penalization methods assume independence between subjects and traits and can be suboptimal. There are a few methods in the literature based on mixed modeling that can accommodate correlations. However, they cannot fully accommodate the two types of correlations while conducting effective marker selection. In this study, we develop a penalized multitrait mixed modeling approach. It accommodates the two different types of correlations and includes several existing methods as special cases. Effective penalization is adopted for marker selection. Simulation demonstrates its satisfactory performance. The GAW 18 data are analyzed using the proposed method.
Cognitive performance in unipolar old‐age depression: a longitudinal study
Authors: Pantzar Alexandra , Atti Anna Rita , Fratiglioni Laura , Fastbom Johan , Bäckman Lars , Laukka Erika J. 
Published: June 2016

ObjectivePrevious studies on cognitive deficits in acute and remitted states of old‐age depression have shown mixed findings. The episodic nature of depression makes repeated assessment of cognitive performance important in order to address reversibility and stability of cognitive deficits.MethodsDementia‐free older participants (≥60 years) from the population‐based Swedish National Study on Aging and Care in Kungsholmen who completed neuropsychological testing at baseline (T1) and follow‐up (T2) formed the basis of the study sample. Participants were grouped according to depression status at T1 and T2: depressed–remitted (n = 32), remitted–depressed (n = 45), and nondepressed–depressed (n = 29). These groups were compared with a group of randomly selected and matched (age, gender, education, and follow‐up time) healthy controls (n = 106) over a period of maximum 6 years.ResultsMixed ANCOVAs, controlling for age and gender, revealed depression‐related deficits for processing speed, attention, executive function, and category fluency. In remitted states, only processing speed and attention were affected. However, these deficits were attenuated after exclusion of persons using benzodiazepine medications. A general pattern of cognitive decline was observed across all groups for processing speed, executive function, category fluency, and episodic and semantic memory; persons transitioning from a nondepressed to depressed state tended to show exacerbated cognitive decline.ConclusionsThe results support the notion that cognitive deficits in depression may be more transient than stable. Consequently, cognitive deficits in depression might be regarded as potential treatment targets rather than stable vulnerabilities. As such, repeated assessment of cognitive functioning may provide an additional marker of treatment response.
Brain activity and connectivity in response to negative affective stimuli: Impact of dysphoric mood and sex across diagnoses
Authors: Mareckova Klara , Holsen Laura M. , Admon Roee , Makris Nikos , Seidman Larry , Buka Stephen , Whitfield‐Gabrieli Susan , Goldstein Jill M. 
Published: June 2016

AbstractNegative affective stimuli elicit behavioral and neural responses which vary on a continuum from adaptive to maladaptive, yet are typically investigated in a dichotomous manner (healthy controls vs. psychiatric diagnoses). This practice may limit our ability to fully capture variance from acute responses to negative affective stimuli to psychopathology at the extreme end. To address this, we conducted a functional magnetic resonance imaging study to examine the neural responses to negative valence/high arousal and neutral valence/low arousal images as a function of dysphoric mood and sex across individuals (n = 99) who represented traditional categories of healthy controls, major depressive disorder, bipolar psychosis, and schizophrenia. Observation of negative (vs. neutral) stimuli elicited blood oxygen‐level dependent responses in the following circuitry: periaqueductal gray, hypothalamus (HYPO), amygdala (AMYG), hippocampus (HIPP), orbitofrontal cortex (OFC), medial prefrontal cortex (mPFC), and greater connectivity between AMYG and mPFC. Across all subjects, severity of dysphoric mood was associated with hyperactivity of HYPO, and, among females, right (R) AMYG. Females also demonstrated inverse relationships between severity of dysphoric mood and connectivity between HYPO ‐ R OFC, R AMYG ‐ R OFC, and R AMYG ‐ R HIPP. Overall, our findings demonstrated sex‐dependent deficits in response to negative affective stimuli increasing as a function of dysphoric mood state. Females demonstrated greater inability to regulate arousal as mood became more dysphoric. These findings contribute to elucidating biosignatures associated with response to negative stimuli across disorders and suggest the importance of a sex‐dependent lens in determining these biosignatures. Hum Brain Mapp 37:3733–3744, 2016. © 2016 Wiley Periodicals, Inc.
Epigenetic regulation of reelin expression in multiple myeloma
Authors: Lin Liang , Wang Pingzhang , Liu Xue , Zhao Dandan , Zhang Yan , Hao Jie , Liang Xiaodong , Huang Xiaojun , Lu Jin , Ge Qing 
Published: June 2016

AbstractReelin (RELN) is a secreted extracellular matrix glycoprotein associated with the positioning and migration of neuronal cells and a few types of non‐neuronal cells. We have previously reported RELN expression in multiple myeloma cells. High RELN expression was associated with poor prognosis and enhanced myeloma cell adhesion and survival. To examine the epigenetic regulation of RELN expression, its promoter methylation status in myeloma‐derived cell lines and primary tumour cells from myeloma patients were analysed. RELN expression was moderate in CD19+ B cells and was upregulated in CD138+ plasma cells. A further upregulated RELN transcription was found in multiple myeloma cells. High expressions of RELN in myeloma cell lines as well as in patients were associated with hypomethylation in RELN promoter region. Demethylation increased RELN transcription in vitro. Together, we established that the methylation status of the promoter proximal cytosine‐phospho‐guanine dinucleotides determines the expression of RELN in myeloma cells. Copyright © 2016 John Wiley & Sons, Ltd.
Does Domestic Intimate Partner Aggression Affect Career Outcomes? The Role of Perceived Organizational Support
Authors: Tolentino Laramie R. , Garcia Patrick Raymund James M. , Restubog Simon Lloyd D. , Scott Kristin L. , Aquino Karl 
Published: June 2016

AbstractDrawing upon the conservation of resources theory, we developed and tested a moderated mediation model linking domestic intimate partner aggression (IPA) to job performance and career advancement. Our model posits that the indirect relationship between IPA and career advancement via in‐role performance and organizational citizenship behaviors (OCBs) is moderated by perceived organizational support (POS). Overall, multisource and multiwave data obtained from two independent samples of employed women from the Philippines supported our predictions. Specifically, results suggest that: (1) IPA was negatively associated with supervisor‐rated in‐role performance and OCBs; (2) there was a stronger negative relationship between IPA and in‐role performance and OCBs for employees with low as opposed to those with high levels of POS; and (3) the conditional indirect effects of IPA in predicting supervisor‐rated promotability and actual promotion via in‐role performance and OCBs were stronger under conditions of low as opposed to high POS. Implications for theory and practice are discussed. © 2016 Wiley Periodicals, Inc.