bluuebunny/crossref_metadata_2025_split huggingface dataset:
Metallic Nickel Hydroxide Nanosheets Give Superior Electrocatalytic Oxidation of Urea for Fuel Cells
Authors: Zhu Xiaojiao , Dou Xinyu , Dai Jun , An Xingda , Guo Yuqiao , Zhang Lidong , Tao Shi , Zhao Jiyin , Chu Wangsheng , Zeng Xiao Cheng , Wu Changzheng , Xie Yi 
Published: August 2016

AbstractThe direct urea fuel cell (DUFC) is an important but challenging renewable energy production technology, it offers great promise for energy‐sustainable developments and mitigating water contamination. However, DUFCs still suffer from the sluggish kinetics of the urea oxidation reaction (UOR) owing to a 6 e− transfer process, which poses a severe hindrance to their practical use. Herein, taking β‐Ni(OH)2 nanosheets as the proof‐of‐concept study, we demonstrated a surface‐chemistry strategy to achieve metallic Ni(OH)2 nanosheets by engineering their electronic structure, representing a first metallic configuration of transition‐metal hydroxides. Surface sulfur incorporation successfully brings synergetic effects of more exposed active sites, good wetting behavior, and effective electron transport, giving rise to greatly enhanced performance for UOR. Metallic nanosheets exhibited a much higher current density, smaller onset potential and stronger durability.
Crosslinked Aspartic Acids as Helix‐Nucleating Templates
Authors: Zhao Hui , Liu Qi‐Song , Geng Hao , Tian Yuan , Cheng Min , Jiang Yan‐Hong , Xie Ming‐Sheng , Niu Xiao‐Gang , Jiang Fan , Zhang Ya‐Ou , Lao Yuan‐Zhi , Wu Yun‐Dong , Xu Nai‐Han , Li Zi‐Gang 
Published: August 2016

AbstractDescribed is a facile helix‐nucleating template based on a tethered aspartic acid at the N‐terminus [terminal aspartic acid (TD)]. The nucleating effect of the template is subtly influenced by the substituent at the end of the side‐chain‐end tether as indicated by circular dichroism, nuclear magnetic resonance, and molecular dynamics simulations. Unlike most nucleating strategies, the N‐terminal amine is preserved, thus enabling further modification. Peptidomimetic estrogen receptor modulators (PERMs) constructed using this strategy show improved therapeutic properties. The current strategy can be regarded as a good complement to existing helix‐stabilizing methods.
Urinary biomarker and treatment mechanism of Rhizoma Alismatis on hyperlipidemia
Authors: Miao Hua , Zhang Li , Chen Dan‐Qian , Chen Hua , Zhao Ying‐Yong , Ma Shuang‐Cheng 
Published: August 2016

AbstractRhizoma Alismatis (RA), a diuretic in Asia and Europe, was found to possess anti‐hyperlipidemic activity. Since the biomarkers and mechanisms of RA in the treatment of hyperlipidemia are inadequate, ultra‐performance liquid chromatography coupled with quadrupole time‐of‐flight synapt high‐definition mass spectrometry and multivariate data analysis were employed to investigate the urinary metabolomics of RA on hyperlipidemic rats induced by high‐fat diet. The metabolic profile of RA‐treated hyperlipidemic group located between control and diet‐induced hyperlipidemic groups. Nineteen metabolites with significant fluctuations were identified as potential biomarkers related to the hyperlipidemia and anti‐hyperlipidemia of RA using partial least‐squares‐discriminate analysis, heatmap analysis and correlation coefficient analysis. The fluctuations of these biomarkers represented disturbances in amino acid metabolism, purine metabolism, pyrimidine metabolism and energy metabolism. After RA treatment, these perturbed metabolites were restored to normal or nearly normal levels. RA can alleviate high‐fat diet‐induced dysfunctions in these metabolic pathways.
Facile Construction of g‐C3N4 Nanosheets/TiO2 Nanotube Arrays as Z‐Scheme Photocatalyst with Enhanced Visible‐Light Performance
Authors: Zhou Dantong , Chen Zhi , Yang Qian , Shen Cai , Tang Gao , Zhao Shilong , Zhang Jingji , Chen Da , Wei Qinhua , Dong Xiaoping 
Published: August 2016

AbstractSemiconductor photocatalysis may be a promising strategy to face energy and environmental issues because it utilizes the solar energy as energy source. The artificially Z‐scheme photocatalytic system has attracted special interests owing to its high efficiency and strong redox ability. Graphitic carbon nitride nanosheets (g‐C3N4 NSs) display prominent performances, which are intensively investigated. Herein, we constructed an all‐solid‐state Z‐scheme photocatalytic system and firstly immobilized g‐C3N4 nanosheets on TiO2 nanotube arrays (TNTAs) by a simple method. The microstructures of prepared g‐C3N4 NSs/TNTAs photocatalyst were characterized by XRD, X‐ray photoelectron spectroscopy, SEM and TEM. The features of light absorption, charge separation, and charge transfer were analyzed by UV/Vis diffuse reflectance techniques, photoluminescence spectroscopy, electrochemical atomic force microscopy, and photocurrent measurement. The synthesized g‐C3N4 NSs/TNTAs samples shows enhanced photocatalytic efficiency for rhodamine B degradation under visible light, which is four times more than that of pure TNTAs. Tetracycline hydrochloride could also be effectively degraded under visible light, which contributes to reducing antibiotic residues in wastewater. Additionally, g‐C3N4 NSs/TNTAs also possess other advantages such as well long‐term stability and easily recyclable properties. A reaction mechanism is also proposed.
Expanding the Catalytic Scope of (Cyclopentadienone)iron Complexes to the Hydrogenation of Activated Esters to Alcohols
Authors: Gajewski Piotr , Gonzalez‐de‐Castro Angela , Renom‐Carrasco Marc , Piarulli Umberto , Gennari Cesare , de Vries Johannes G. , Lefort Laurent , Pignataro Luca 
Published: August 2016

AbstractHerein, we report the application of easy‐to‐make and bench‐stable (cyclopentadienone)iron complexes (such as 1) as precatalysts for the hydrogenation of esters. After optimization of the reaction conditions (i.e., solvent, temperature, pressure), complex 1 was tested in the hydrogenation of a range of esters. With most of the activated trifluoroacetate esters, quantitative formation of 2,2,2‐trifluoroethanol was obtained at low catalyst loadings. For nonactivated esters, no reaction was observed. Trifluoroacetic acid, a common impurity in hydrolytically labile trifluoroacetate esters, was shown to act as a poison for the catalyst. However, the simple addition of Et3N allowed the catalyst activity to be restored. Our study constitutes the first examples of ester hydrogenation with an Fe complex based on a non‐pincer ligand.
Energy‐Economic Analysis of Thermal‐Expansionary Pretreatment for Its Implementation at a Biogas Plant
Authors: Kutsay Andrey , Kratky Lukas , Jirout Tomas 
Published: August 2016

AbstractThermal‐expansionary pretreatment is a novel environmentally friendly technology that has high potential to be installed in various industrial biofuel technologies where lignocellulosic biomass is processed. It is based on the boiling of biomass in water maintained by pressure in the liquid state, under a process temperature and a residence time with subsequent rapid batch decompression. The performance of the intensified pretreatment technology was shown in an intensified full‐scale biogas plant. Wheat straw was used as the model processing substrate. To show the improvement, the results were compared with the regular non‐intensified biogas plant. It was found that the intensified plant had a much higher power. The economic analysis and payback period were performed for both types of plant.
A Ligand That Targets CUG Trinucleotide Repeats
Authors: Li Jinxing , Matsumoto Jun , Bai Li‐Ping , Murata Asako , Dohno Chikara , Nakatani Kazuhiko 
Published: August 2016

AbstractThe development of small molecules that can recognize specific RNA secondary and tertiary structures is currently an important research topic for developing tools to modulate gene expression and therapeutic drugs. Expanded CUG trinucleotide repeats, known as toxic RNA, capture the splicing factor MBNL1 and are causative of neurological disorder myotonic dystrophy type 1 (DM1). Herein, the rational molecular design, synthesis, and binding analysis of 2,9‐diaminoalkyl‐substituted 1,10‐phenanthroline (DAP), which bound to CUG trinucleotide repeats, is described. The results of melting temperature (Tm) analyses, surface plasmon resonance (SPR) assay, and electrospray spray ionization time‐of‐flight (ESI‐TOF) mass spectrometry showed that DAP bound to r(CUG)9 but not to r(CAG)9 and r(CGG)9. The dual luciferase assay clearly indicated DAP bound to the r(CUG)n repeat by affecting the translation in vitro.
Tuning the Accessibility and Activity of Au25(SR)18 Nanocluster Catalysts through Ligand Engineering
Authors: Li Jingguo , Nasaruddin Ricca Rahman , Feng Yan , Yang Jun , Yan Ning , Xie Jianping 
Published: August 2016

AbstractIn this work, the effects of thiolate ligands (‐SR, e.g., chain length and functional moiety) on the accessibility and catalytic activity of thiolate‐protected gold nanoclusters (e.g., Au25(SR)18) for 4‐nitrophenol hydrogenation is reported. The data suggest that Au25(SR)18 bearing a shorter alkyl chain shows a better accessibility to the substrates (shown by shorter induction time, t0) and a higher catalytic activity (shown by higher apparent reaction rate constant, kapp). The functional moiety of the ligands is another determinant factor, which clearly suggests that ligand engineering of Au25(SR)18 would be an efficient platform for fine‐tuning its catalytic properties.
Two Unusual Nanocage‐Based Ln‐MOFs with Triazole Sites: Highly Fluorescent Sensing for Fe3+ and Cr2O72−, and Selective CO2 Capture
Authors: Liu Jian‐Qiang , Li Gao‐Peng , Liu Wei‐Cong , Li Qing‐Lin , Li Bao‐Hong , Gable Robert W. , Hou Lei , Batten Stuart R. 
Published: August 2016

AbstractLuminescent metal–organic frameworks (LMOFs) containing fluorescent probes for the detection of pollutants such as organic solvents and heavy metals are becoming increasingly important, with lanthanide‐MOF (Ln‐MOF) materials receiving greater attention owing to the possibility of achieving fine‐tuned luminescent properties. Herein, two unusual isostructural nanocage‐based three‐dimensional Ln‐MOFs, 1‐Ln (Ln=Tb, Eu), are constructed, using a new diisophthalate ligand with active Lewis basic triazole sites. Selective gas adsorption, especially the removal of CO2 from CH4, a primary component of natural gas and biogas, is desirable in terms of both economic and environmental considerations. 1‐Eu is found to exhibit highly efficient luminescent sensing for Fe3+ cations and Cr2O72− anions, as well as selective CO2 capture over CH4.
Activated Carbons Prepared through H3PO4‐Assisted Hydrothermal Carbonisation from Biomass Wastes: Porous Texture and Electrochemical Performance
Authors: Quesada‐Plata Fabian , Ruiz‐Rosas Ramiro , Morallón Emilia , Cazorla‐Amorós Diego 
Published: August 2016

AbstractHydrothermal treatment of biomass in the presence of phosphoric acid is proposed for the production of activated carbons (ACs). Interestingly, H3PO4 promotes the fixation of carbon atoms in the solid during hydrothermal treatment, which renders higher preparation yields than those of the conventional impregnation method. Upon carbonisation of the resulting hydrochars at 450 °C, a notable development of porosity is achieved by using a low amount and concentration of phosphoric acid; these conditions are not adequate for conventional activation. The viability of this process for the sustainable production of ACs has been successfully checked in four biomasses of different composition and structures, and ACs of surface areas above 2000 m2 g−1 and tuneable pore size distribution have been obtained. Electrochemical characterisation of ACs prepared at 750 °C in 1 m H2SO4 demonstrates that capacitances of approximately 150 F g−1 with acceptable rate performance can be obtained through this simple method.
Charge‐ and Size‐Selective Molecular Separation using Ultrathin Cellulose Membranes
Authors: Puspasari Tiara , Yu Haizhou , Peinemann Klaus‐Viktor 
Published: August 2016

AbstractTo date, it is still a challenge to prepare high‐flux and highselectivity microporous membranes thinner than 20 nm without introducing defects. In this work, we report for the first time the application of cellulose membranes for selective separation of small molecules. A freestanding cellulose membrane as thin as 10 nm has been prepared through regeneration of trimethylsilyl cellulose (TMSC). The freestanding membrane can be transferred to any desired substrate and shows a normalized flux as high as 700 L m−2 h−1 bar−1 when supported by a porous alumina disc. According to filtration experiments, the membrane exhibits precise size‐sieving performances with an estimated pore size between 1.5–3.5 nm depending on the regeneration period and initial TMSC concentration. A perfect discrimination of anionic molecules over neutral species is demonstrated. Moreover, the membrane demonstrates high reproducibility, high scale‐up potential, and excellent stability over two months.
Elucidation of Surface Species through in Situ FTIR Spectroscopy of Carbon Dioxide Adsorption on Amine‐Grafted SBA‐15
Authors: Foo Guo Shiou , Lee Jason J. , Chen Chia‐Hsin , Hayes Sophia E. , Sievers Carsten , Jones Christopher W. 
Published: August 2016

AbstractThe nature of the surface species formed through the adsorption of CO2 on amine‐grafted mesoporous silica is investigated through in situ FTIR spectroscopy with the aid of 15N dynamic nuclear polarization (DNP) and 13C NMR spectroscopy. Primary, secondary, and tertiary amines are functionalized onto a mesoporous SBA‐15 silica. Both isotopically labeled 13CO2 and natural‐abundance CO2 are used for accurate FTIR peak assignments, which are compared with assignments reported previously. The results support the formation of monomeric and dimeric carbamic acid species on secondary amines that are stabilized differently to the monocarbamic acid species on primary amines. Furthermore, the results from isotopically labelled 13CO2 experiments suggest the existence of two carbamate species on primary amines, whereas only one species is observed predominantly on secondary amines. The analysis of the IR peak intensities and frequencies indicate that the second carbamate species on primary amines is probably more asymmetric in nature and forms in a relatively smaller amount. Only the formation of bicarbonate ions at a low concentration is observed on tertiary amines; therefore, physisorbed water on the surface plays a role in the hydrolysis of CO2 even if water is not added intentionally and dry gases are used. This suggests that a small amount of bicarbonate ions could be expected to form on primary and secondary amines, which are more hydrophilic than tertiary amines, and these low concentration species are difficult to observe on such samples.
Standardization and quality control for high‐dimensional mass cytometry studies of human samples
Authors: Kleinsteuber Katja , Corleis Björn , Rashidi Narges , Nchinda Nzuekoh , Lisanti Antonella , Cho Josalyn L. , Medoff Benjamin D. , Kwon Douglas , Walker Bruce D. 
Published: August 2016

AbstractMass cytometry (CyTOF), a mass spectrometry‐based single cell phenotyping technology, allows utilization of over 35 antibodies in a single sample and is a promising tool for translational human immunology studies. Although several analysis tools are available to interpret the complex data sets generated, a robust method for standardization and quality control within and across studies is needed. Here we report an efficient and easily adaptable method to monitor quality of individual samples in human immunology studies and to facilitate reproducible data analysis. Samples to be assessed are spiked with a defined amount of reference peripheral blood mononuclear cells from a healthy donor, derived from a single large blood draw. The presence of known standardized numbers and phenotypic profiles of these reference cells greatly facilitates sample analysis by allowing for: 1) quality control for consistent staining of each antibody in the panel, 2) identification of potential batch effects, and 3) implementation of a robust gating strategy. We demonstrate the utility of this method using peripheral blood and bronchoalveolar lavage samples from HIV+ patients by characterizing their CD8+ T‐cell phenotypes and cytokine expression, respectively. Our results indicate that this method allows quality control of experimental conditions and results in highly reproducible population frequencies through a robust gating strategy. © 2016 International Society for Advancement of Cytometry
Quantification of mitochondrial reactive oxygen species in living cells by using multi‐laser polychromatic flow cytometry
Authors: De Biasi Sara , Gibellini Lara , Bianchini Elena , Nasi Milena , Pinti Marcello , Salvioli Stefano , Cossarizza Andrea 
Published: August 2016

AbstractReactive oxygen species (ROS) are constantly produced in cells, mainly by mitochondria, as a consequence of aerobic respiration. Most ROS derive from superoxide, which is rapidly converted to hydrogen peroxide. ROS are involved in the regulation of several physiological and pathological processes, and the possibility to measure them simultaneously is needed, when the redox status of the cells is modified by experimental/biological conditions. Flow cytometry is the main technology that generates multiple information at the single cell level in a high‐throughput manner, and gives rapid and quantitative measurements of different ROS with high sensitivity and reproducibility. Here, we describe a novel approach to detect simultaneously mitochondrial hydrogen peroxide and mitochondrial superoxide in living cells. The staining has been performed by using the fluorescent dyes MitoSOX Red Mitochondrial Superoxide Indicator, Mitochondria Peroxy Yellow 1, Annexin‐V Pacific Blue conjugate, TO‐PRO‐3 iodide, anti‐CD4‐APC‐Cy7 and ‐CD8‐Pacific Orange mAbs. We used this approach to quantify mitochondrial ROS in CD4+ and CD8+ T cells form patients affected by Down syndrome and age‐ and sex‐matched healthy donors. © 2016 International Society for Advancement of Cytometry
A driving behavior detection system based on a smartphone's built‐in sensor
Authors: Li Yantao , Xue Fengtao , Feng Lei , Qu Zehui 
Published: August 2016

SummaryTraffic accidents resulting from driving behavior and road conditions are crucial problems for drivers. The causes and responses to traffic accidents have been widely studied by researchers. Whereas several approaches have been proposed to ease these problems, most works entail high computational costs or rigid hardware conditions. To address these challenges, we propose Health Driving, a smartphone‐based system for detecting driving events and road conditions solely with a built‐in smartphone acceleration sensor. More specifically, we first collect acceleration data from the acceleration sensor of a smartphone on a vehicle, and then utilize an acceleration reorientation calibration algorithm to convert the obtained acceleration data from the smartphone to acceleration data of the vehicle. Finally, we exploit Health Driving to detect driving events and road conditions, and evaluate the seriousness of the road conditions and driving events by using an efficient scoring mechanism based on the ISO 2631 standard. An extensive evaluation demonstrates that Health Driving operates successfully with an ordinary smartphone, and operates with a low computational cost compared with other methods. Copyright © 2016 John Wiley & Sons, Ltd.
An efficient network‐coding based back‐pressure scheduling algorithm for wireless multi‐hop networks
Authors: Jiao Zhenzhen , Yan Yan , Zhang Baoxian , Li Cheng 
Published: August 2016

SummaryBack‐pressure scheduling has been considered as a promising strategy for resource allocation in wireless multi‐hop networks. However, there still exist some problems preventing its wide deployment in practice. One of the problems is its poor end‐to‐end (E2E) delay performance. In this paper, we study how to effectively use inter‐flow network coding to improve E2E delay and also throughput performance of back‐pressure scheduling. For this purpose, we propose an efficient network coding based back‐pressure algorithm (NBP), and accordingly design detailed procedure regarding how to consider coding gain in back‐pressure based weight calculation and how to integrate it into next hop decision making in the NBP algorithm. We theoretically prove that NBP can stabilize the networks. Simulation results demonstrate that NBP can not only improve the delay performance of back‐pressure algorithm, but also achieve higher network throughput. Copyright © 2016 John Wiley & Sons, Ltd.
Outage performance of cognitive radio networks with multiple decode‐and‐forward relays
Authors: Xu Wenbo , Wang Yifan , Lin Jiaru , Chai Juanfang 
Published: August 2016

SummaryThis paper considers the cognitive radio network with one primary user (PU), one secondary user (SU), and multiple decode‐and‐forward relays. We propose a relaying scheme to ensure the priority of primary transmission, where the relays are used to forward PU's message and sometimes also SU's message. First, SU is allowed to use the spectrum to transmit only when its transmission would not affect the decoding status of PU's message at all relays. Second, once the secondary transmission happens, the relays that successively decode SU's message are allowed to retransmit this message when it would not affect the decoding status of PU's message at primary receiver. The interference from PU to SU and the interference from SU to PU are both considered. By analyzing the decoding status of primary message and secondary message at different relays, we formulate the outage probabilities of both primary transmission and secondary transmission. When all channels follow Rayleigh distributions, we derive the analytical expressions for the general case of any number of relays, which are validated by means of Monte Carlo simulations. Copyright © 2016 John Wiley & Sons, Ltd.
Gut microbiota after Roux‐en‐Y gastric bypass and sleeve gastrectomy in a diabetic rat model: Increased diversity and associations of discriminant genera with metabolic changes
Authors: Guo Yan , Liu Chao‐Qian , Shan Cheng‐Xiang , Chen Yue , Li Hui‐Hua , Huang Zhi‐Ping , Zou Da‐Jin 
Published: August 2016

AbstractRecent work with gut microbiota after bariatric surgery is limited, and the results have not been in agreement. Given the role of the gut microbiota in regulating host metabolism, we explored the effect of Roux‐en‐Y gastric bypass (RYGB) and sleeve gastrectomy (SG) on the modifications of gut microbiota with regard to the potential influence of food intake and/or weight loss and examined their links with host metabolism. Zucker diabetic fatty rats were divided into the following groups: RYGB; sham‐operated with pair‐fed as RYGB; sham‐operated fed ad libitum; and SG. The metabolic effects and gut microbiota profile were analyzed 10 weeks postoperatively. Associations between discriminating genera and metabolic markers after RYGB were explored. The 2 procedures induced similar glucose improvement and increased flora diversity after 10 weeks compared with sham‐operated groups. RYGB induced a marked higher relative abundance of Proteobacteria/Gammaproteobacteria and Betaproteobacteria and increased emergence of Fusobacteria and Clostridium, whereas SG resulted in more abundant Actinobacteria compared with other groups. Most of the 12 discriminant genera correlated with changes in metabolic phenotype, but only 28.6% of these correlations were independent of weight, and 4 discriminant genera still negatively correlated with serum insulin level independent of food intake and weight loss after RYGB. These data demonstrate that RYGB and SG surgery produced similar diversity but different microbiota compositions changes in Zucker diabetic fatty rats. These findings stimulate deeper explorations of functions of the discriminate microbiota and the mechanisms linking postsurgical modulation of gut microbiota and improvements in insulin resistance.