bluuebunny/crossref_metadata_2025_split huggingface dataset:
Anti‐Inflammatory Activities and Related Mechanism of Polysaccharides Isolated from Sargentodoxa cuneata
Authors: Guo Lanfang , Ma Ruili , Sun Huifang , Raza Aun , Tang Jian , Li Zhengrong 
Published: August 2018

AbstractSargentodoxa cuneata decoction has been used to treat arthritis in China for hundreds of years. Herein, the polysaccharide fraction (PSC) purified from S. cuneata was evaluated for its in vitro and in vivo anti‐inflammatory effects. PSC and its sub‐fractions PSCA‐1 and PSCB‐1 significantly suppressed nitric oxide (NO) release in LPS‐induced RAW264.7 cells by down regulating the inducible nitric oxide synthase (iNOS) level. Furthermore, PSC markedly inhibited carrageenan induced rat hind paw edema, decreased in hind paw, serum and liver malondialdehyde (MDA) levels and prostaglandin E2 (PGE2) levels. In addition, PSC increased superoxide dismutase (SOD) activity in serum and liver of the rats. These results revealed that the polysaccharide obtained from S. cuneata (PSC) possessed potent anti‐inflammatory activity and may be one of the important bioactive constituents from the plant responsible for the anti‐arthritis effect.
Precursor‐Directed Diversification of Cyclic Tetrapeptidic Pseudoxylallemycins
Authors: Guo Huijuan , Schmidt Alexander , Stephan Philipp , Raguž Luka , Braga Daniel , Kaiser Marcel , Dahse Hans‐Martin , Weigel Christiane , Lackner Gerald , Beemelmanns Christine 
Published: August 2018

AbstractCyclic peptides containing non‐proteinogenic amino acids often exhibit a broad bioactivity spectrum and many have entered clinical trials with good prospects for drug development. We recently reported the discovery of six cyclic tetrapeptides, pseudoxylallemycins A–F (1–6), from a termite‐associated Pseudoxylaria sp. X802. These compounds contain a rare O‐homoallenyl‐l‐tyrosine moiety and show promising antimicrobial activity against the Gram‐negative pathogenic bacterium Pseudomonas aeruginosa. To perform more detailed structure–activity studies, we pursued a precursor‐directed diversification strategy. Herein, we report the purification, identification, and testing of 21 new pseudoxylallemycin derivatives.
Metal allergy patient treated by titanium implant denture: A case report with at least 4‐year follow‐up
Authors: Yan Huijiao , Afroz Shaista , Dalanon Junhel , Goto Nami , Hosoki Maki , Matsuka Yoshizo 
Published: August 2018

Key Clinical MessagePatch testing with metal reagents was positive on female patient with history of metal hypersensitivity after dental treatment. All of the dental restorations with metal components were removed, and subsequent oral rehabilitation utilizing dental implants and metal‐free prostheses was carried out. The treatments alleviate the presenting signs and symptoms.
Role of Cationic Oxidation States to Enhance the Electroactive β‐Phase of Poly(vinylidene Fluoride) and its Energy Harvesting Performance
Authors: Ganesan Kausalya , Alluri Nagamalleswara R. , Raj Nirmal Prashanth M. J. , Chandrasekhar A. , Kim S.‐J. 
Published: August 2018

AbstractTransparent, flexible and efficient ferroelectric composite films were fabricated by a simple ultrasonication approach followed by thermal treatment. The enhanced electroactive β‐phase and stabilization of the ferroelectric poly(vinylidene fluoride) (PVDF) polymer were analyzed by the substitution of various cations with different oxidation states (Li1+, Al3+) as fillers. The electroactive β‐phase was obtained due to the stretching of −CH2−/−CF2− molecular chains, stress‐induced effects during the sonication process and the interfacial interaction between the molecular chains and the surface charge of foreign elements. Further, a flexible ferroelectric nanogenerator was implemented and subjected to harness the waste biomechanical energy. The PVDF/Al3+ composite film‐based device gave the maximum amount of voltage and current of 189 V and 0.97 μA respectively at 2 N force. This high electrical output is caused by the electrostatic interaction between electronegative fluorine atoms and the surface active, positive charged ions of the fillers. The obtained maximum instantaneous power density of the FF‐CNG device at 20 MΩ load resistance is 1.92 mW/m2. The generated output is used to power up commercial light‐emitting diodes and display devices without using storage components. The proposed approach for enhancing the throughput of ferroelectric polymers can pave the way to develop new smart composite films for efficient energy conversion.
Electrochemical Flash Fluorination and Radiofluorination
Authors: Balandeh Mehrdad , Rios Alejandra , Allison Nathanael , Shirazi Daniela , Gomez Adrian , Rambaran Laura , Holloway Travis , Sadeghi Saman 
Published: August 2018

AbstractA new method for rapid late‐stage fluorination using the cation pool technique is presented. Fluorination and no‐carrier‐added radiofluorination of methyl (phenylthio) acetate, methyl 2‐(methylthio) acetate, and methyl 2‐(ethylthio) acetate were performed. The carbocations formed through electrochemical oxidation were stabilized by using a divided electrochemical cell and 2,2,2‐trifluoroethanol (TFE) as the solvent at −20 °C. At the end of electrolysis, either stable‐isotope [19F]fluoride or no‐carrier‐added radioactive [18F]fluoride was added to the reaction mixture to form the fluorinated or radiofluorinated product.
Electrochemical and Spectroscopic Study of Homo‐ and Hetero‐Dimetallic Phthalocyanines as Catalysts for the Oxygen Reduction Reaction in Acidic Media
Authors: Wang Xiaojiang , Liu Yang , Wang Ying , Ren Rong , Chen Hengquan , Jiang Zheng , He Qinggang 
Published: August 2018

AbstractMetallophthalocyanines (MPc, M=Fe or Co) have been investigated extensively as a typical type of transition metal macrocyclic catalysts for the oxygen reduction reaction (ORR). However, the understanding about ORR catalyzed by binuclear even heterodimetallic phthalocyanines in acidic condition is still not sufficient. Herein we synthesized two homodimetallicphthalocyanine (FePc‐PcFe and CoPc‐PcCo) and a heterodimetallic phthalocyanine (FePc‐PcCo). The electrocatalytic activity of as‐synthesized compounds were characterized by cyclic voltammetry (CV) and rotating disk electrode (RDE). Generally, the binuclear metallophthalocyanines show higher activity than their monomeric analogues including FePc and CoPc. Also, the Fe compounds exhibit better catalytic performance than the Co phthalocyanines. However, interestingly the heterodimetallic phthalocyanine FePc‐PcCo shows similar half‐wave potential and ORR activity with FePc‐PcFe, rather than CoPc‐PcCo. This may be explained by XPS and XAS, which reveal a similar square‐planar structure existed in FePc‐PcCo and FePc‐PcFe and a non‐planar structure in CoPc‐PcCo. Furthermore, the increasing of the ORR activity among those five catalysts is well in agreement with the descending LUMO energies in DFT calculations. A lower LUMO energy indicates a favorable adsorption of O2, which in turn affects the ORR performance.
Use of Polymer Coatings to Enhance the Response of Redox‐Polymer‐Mediated Electrodes
Authors: Xiao Xinxin , Conghaile Peter Ó , Leech Dónal , Magner Edmond 
Published: August 2018

AbstractThe successful use of biosensors requires that the sensor can operate over abroad enough linear range that encompasses the physiological concentration of the substrate of interest. A polymer coating layer functioning as a mass‐transport barrier is typically used to expand the linear range of biosensors with, however, the concomitant disadvantage of a reduction in the response. Effects of a poly(acrylic acid) coating layer on the response of a glassy carbon electrode modified with an Os redox polymer and lactate oxidase were evaluated. The coating layer resulted in an expanded linear range from 7 to 15 mM, doubled catalytic response towards the oxidation of 35 mM lactate, and improved operational stability. Detailed voltammetry studies revealed that the coating layer can improve the amount of the redox polymer that is available as a mediator, leading to the increased catalytic response at high concentrations of substrate. Similar results were obtained with other polymer layers [polystyrene sulfonate, poly(diallyldimethyl‐ammonium chloride), and poly(3,4‐ethylenedioxythiophene)] and with the enzymes glucose oxidase and bilirubin oxidase, demonstrating the general nature of the method.
A Novel CVD Growth of g‐C3N4 Ultrathin Film on NiCo2O4 Nanoneedles/Carbon Cloth as Integrated Electrodes for Supercapacitors
Authors: Guo Wen , Ming Shujun , Chen Zhen , Bi Jiajun , Ma Yajuan , Wang Jingyu , Li Tao 
Published: August 2018

AbstractAlthough g‐C3N4 possesses many features such as a graphene‐like 2D π‐conjugated planar layered structure, high nitrogen content, excellent mechanical strength and flexibility, as well as high thermal and chemical stability, there are only a few studies on the exploration of g‐C3N4 as active materials for supercapacitors. This could be largely attributed to the fact that the above advantages of g‐C3N4 to hybrid with other materials are still not fully established. Herein, we successfully develop a facile low‐temperature CVD method to grow g‐C3N4 ultrathin films with several nanometers thickness on the surface of NiCo2O4 nanoneedles. Subsequently, a NiCo2O4 nanoneedles@g‐C3N4 ultrathin film core‐shell nanostructures/carbon cloth (NiCo2O4 NNs@g‐C3N4/CC) integrated electrode was obtained. Thanks to the ultrathin film, a core‐shell nanostructure, as well as intrinsic features of g‐C3N4, the as‐obtained integrated electrode displays excellent electrochemical performance, exhibiting an areal capacitance of 2.83 F cm−2 as well as high cycling stability (5.88 % loss after 10 000 cycles). Our results clearly demonstrate that the g‐C3N4 ultrathin film obtained through this facile CVD method developed has potential in hybridizing with other transition metal oxides as electrode materials for supercapacitors and, more importantly, this convenient synthesis method may also be widely used for other applications such as designing new heterojunction photocatalysts.
Electrochemical Mix‐Reduction Process of U and U‐Fe Alloys on the Surface of Cathode in LiCl‐KCl‐U3O8 at 773 K
Authors: Jiang Kewei , Liu Qi , Liu Jingyuan , Zhang Hongsen , Chen Rongrong , Yan Yongde , Li Rumin , Song Dalei , Shao Yawei , Wang Jun 
Published: August 2018

AbstractThe front cover artwork is provided by Kewei Jiang and Prof. Jun Wang from Harbin Engineering University (Heilongjiang, China). The image shows the conversion of U3O8 to U, which was achieved by using an electrochemical mix‐reduction process. Read the full text of the Article at 10.1002/celc.201800573.
Actinide Organometallic Complexes with π‐Ligands
Authors: Walter Olaf 
Published: August 2018

AbstractRecent developments and results from the organometallic chemistry of the actinides are reviewed. In the last one and a half years the structural data of about 15 organometallic complexes of transuranium actinides (Np or Pu) have been published, all involving π‐ligands in the coordination sphere of the metal ion. On the basis of these data, a comparison of these molecules is presented. Depending on the steric demands of the ligands, effects like the actinide contraction seem to be stronger or weaker in the structural features. This indicates that the interplay between the actinide ion and the π‐ligand is rather flexible, enabling the formation of stable bonds over a broad range of actinide ion oxidation states.
Six Isomorphous Window‐Beam MOFs: Explore the Effects of Metal Ions on MOF‐Derived Carbon for Supercapacitors
Authors: Yue Man‐Li , Yu Cheng‐Yan , Duan Hui‐Hui , Yang Bo‐Long , Meng Xiao‐Xue , Li Zuo‐Xi 
Published: August 2018

AbstractSix isomorphous metal–organic frameworks (MOFs) with a 3D window‐beam architecture have been synthesized from solvothermal reactions, and are named Zn, Cd, Ni, Co, Mn and Cu‐MOF, respectively. The series of MOFs was utilized as precursors to synthesize MOF‐derived carbon with different morphologies. Zn and Cd‐MOFs lead to the derivation of porous carbons (PCs), which exhibit remarkable BET specific surface areas. For derivates of Ni, Co and Mn‐MOFs, graphitized carbons (GCs) show some carbon graphitization, but their BET specific surface areas are relatively small. C‐Cu has the smallest BET specific surface area, and there is no carbon graphitization. Therefore, the metal ion of the parent MOF exerts a crucial effect on the preparation of MOF‐derived carbon, such as the pore‐forming effect of Zn and Cd species, and catalytic graphitization of Ni, Co, and Mn species. The capacitances of MOF‐derived carbon follow the sequence of PCs>GCs>C‐Cu, which reveals that the specific surface area plays a dominant role in the capacitive performance of electrical double layer capacitors (EDLCs), and that the graphitization could improve the capacitance. Significantly, PC‐Zn exhibits the best specific capacitance (138 F g−1 at 0.5 Ag−1), and excellent life cycle, which can be applied as an electrode material in supercapacitors.
[4‐(Ph3B)‐2,6‐Mes2Py]−: A Sterically Demanding Anionic Pyridine
Authors: Schmidlin Nadja M. C. , Lõkov Märt , Leito Ivo , Böttcher Tobias 
Published: August 2018

AbstractThe introduction of a triphenylborate group at the 4‐position of 2,6‐dimesitylpyridine afforded a sterically demanding anionic pyridine. The charge introduced through the borate group drastically increases its basicity and measurement of its pKa value (18.46) revealed a significantly higher value than that of 4‐dimethylaminopyridine (17.95). THF ring‐opening was observed upon treating its lithium salt with TMSCl, which demonstrates its high nucleophilicity. The mesityl groups at the 2,6‐positions are oriented orthogonal to the pyridine ring and do not block the nitrogen atom of the pyridine. The reaction of the protonated pyridine with Li[BH4] yielded the corresponding Lewis acid/base adduct, which shows that the title compound can be used as a monodentate ligand in coordination chemistry. The crystal structures of all the compounds presented in this work are reported.
Phenanthroline—A Versatile Ligand for Advanced Functional Polymeric Materials
Authors: Rothfuss Hannah , Knöfel Nicolai D. , Tzvetkova Pavleta , Michenfelder Nadine C. , Baraban Sergej , Unterreiner Andreas‐Neil , Roesky Peter W. , Barner‐Kowollik Christopher 
Published: August 2018

AbstractThe controlled incorporation of phenanthroline moieties into polymers is introduced, demonstrating their application as metal‐ion complexing ligands for the construction of advanced macromolecular structures. Specifically, two phenanthroline‐containing monomers based on acrylate and styrene functionalities, were synthesized. Each monomer was readily copolymerized with either N,N‐dimethylacrylamide or styrene via nitroxide‐mediated polymerization, resulting in narrowly distributed polar or non‐polar copolymers. To demonstrate the versatility of the established polymer systems, the polar polymer was employed for transition metal induced single‐chain nanoparticle formation, verified by diffusion‐ordered NMR and UV/Vis spectroscopy. Furthermore, the non‐polar polymer allows facile incorporation of lanthanide ions, creating luminescent metallo‐polymers, in‐depth characterized by advanced photophysical experiments and 2D NMR measurements.
Mutually Exclusive Cellular Uptake of Combinatorial Supramolecular Copolymers
Authors: van Dun Sam , Schill Jurgen , Milroy Lech‐Gustav , Brunsveld Luc 
Published: August 2018

AbstractThe cellular uptake of self‐assembled biological and synthetic matter results from their multicomponent properties. However, the interplay of the building block composition of self‐assembled materials and uptake mechanisms urgently requires addressing. It is shown here that supramolecular polymers that self‐assemble in aqueous media, are a modular and controllable platform to modulate cellular delivery by the introduction of small ligands or cationic moieties, with concomitantly different cellular uptake kinetics and valence dependence. A library of supramolecular copolymers revealed stringent mutually exclusive uptake behavior in which either of the uptake pathways dominated, with sharp compositional transition. Supramolecular biomaterial engineering thus provides for adaptive platforms with great potential for efficient tuning of multivalent and multicomponent systems interfacing with biological matter.
Highly Efficient and Stable Inorganic Perovskite Quantum Dots by Embedding into a Polymer Matrix
Authors: Zhu Jinyang , Xie Zhifeng , Sun Xueke , Zhang Siyuan , Pan Gencai , Zhu Yongsheng , Dong Biao , Bai Xue , Zhang Hanzhuang , Song Hongwei 
Published: August 2018

AbstractAll‐inorganic perovskite quantum dots (QDs) with high photoluminescence quantum yield, narrow spectral bandwidth, and broad spectral tunability have broad applications. However, perovskite QDs suffer from poor stability and the fast anion‐exchange reaction between different halide ions. Herein, we embedded green‐light‐emitting CsPbBr3 QDs and red‐light‐emitting CsPb(Br/I)3 QDs into carboxyl‐containing polymethyl methacrylate (PMMA) by the hot‐injection method. As a result, the as‐prepared perovskite@PMMA composites not only retain high luminescence but also exhibit good water resistance. Moreover, this treatment prevents anion exchange between different halide QD particles in the solid state. The applications in light‐emitting diodes and cellular labeling agents are also carried out to demonstrate their good stability.
Energy‐based tuning of convolutional neural networks on multi‐GPUs
Authors: Castro F. M. , Guil N. , Marín‐Jiménez M. J. , Pérez‐Serrano J. , Ujaldón M. 
Published: August 2018

SummaryDeep Learning (DL) applications are gaining momentum in the realm of Artificial Intelligence, particularly after GPUs have demonstrated remarkable skills for accelerating their challenging computational requirements. Within this context, Convolutional Neural Network (CNN) models constitute a representative example of success on a wide set of complex applications, particularly on datasets where the target can be represented through a hierarchy of local features of increasing semantic complexity. In most of the real scenarios, the roadmap to improve results relies on CNN settings involving brute force computation, and researchers have lately proven Nvidia GPUs to be one of the best hardware counterparts for acceleration. Our work complements those findings with an energy study on critical parameters for the deployment of CNNs on flagship image and video applications, ie, object recognition and people identification by gait, respectively. We evaluate energy consumption on four different networks based on the two most popular ones (ResNet/AlexNet), ie, ResNet (167 layers), a 2D CNN (15 layers), a CaffeNet (25 layers), and a ResNetIm (94 layers) using batch sizes of 64, 128, and 256, and then correlate those with speed‐up and accuracy to determine optimal settings. Experimental results on a multi‐GPU server endowed with twin Maxwell and twin Pascal Titan X GPUs demonstrate that energy correlates with performance and that Pascal may have up to 40% gains versus Maxwell. Larger batch sizes extend performance gains and energy savings, but we have to keep an eye on accuracy, which sometimes shows a preference for small batches. We expect this work to provide a preliminary guidance for a wide set of CNN and DL applications in modern HPC times, where the GFLOPS/w ratio constitutes the primary goal.
Simulating systems of systems using situation/reaction paradigm
Authors: Benabidallah Rymel , Sadou Salah , Esnault Armel , Nacer Mohamed Ahmed 
Published: August 2018

SummaryModeling and simulation play a major role in complex system engineering. In Systems of Systems (SoS) engineering, a special case of complex systems engineering, they help to better understand and identify the side effects associated with the integration of autonomous constituent systems. Simulation is also a way of apprehending the emerging behaviors from this integration. The dynamic and evolving nature of the SoS environment has led us to rely on their most stable part to define them, namely their mission. In this paper, we propose a simulation framework for SoS based on a mission conceptual model. Mission is defined as a set of situations that require reactions. Situations are defined by rules on facts related to the SoS environment. Reactions are defined as orchestrations of services from constituent systems (subsystems) that must be triggered when a situation is identified. We present this simulation approach through a case study on a Telediabet SoS.
Cloud storage–based personalized sports activity management in Internet plus O2O sports community
Authors: Yu Lan 
Published: August 2018

SummaryWith the development of Internet plus technologies such as IoT, cloud computing, mobile Internet, and big data analysis, several new forms of sports community, which provided significant conveniences to the exercisers, were proposed. However, online communications are still deficient, and relationships among exercisers and between exercisers and sports activities are absent. To solve these problems, an Internet plus O2O sports community was proposed, and the idea and methods of sports activities management are discussed in this paper. Firstly, the activity management framework contributed by activity organizers, participants, and followers is constructed using cloud storage technology. Responsibilities of different kinds of users and constitution of activity data are also described. Secondly, six personalized recommendation algorithms, including tag‐based, relationship‐based, ranking list–based, content‐based, content‐based collaborative filtering, and user‐based collaborative filtering algorithms and their application in sports community are presented. Thirdly, a novel activity management model is designed, which supports online‐offline deep fusion and provides management of the whole procedures of a sports activity. Primary tasks of different activity stages are described. Finally, analysis methods and exhibition forms of statistics, text, and multimedia data are discussed.
Energy efficient channel aware multipath routing protocol for mobile ad‐hoc network
Authors: M. Anand , T. Sasikala , M. Anbarasan 
Published: August 2018

SummaryMobile ad‐hoc network (MANET) is a gathering of portable nodes that works without foundation or central administration. Because of the accessibility of little and cheap remote conveying nodes, MANETs can be utilized as a part of different applications, for example, front line correspondence and debacle alleviation applications. Energy consumption is an important issues in MANET because the mobile nodes are battery powered, hence diminishing system lifetime as batteries get depleted rapidly as nodes move and change their positions quickly crosswise over MANET. We propose an energy efficient channel aware routing algorithm for mobile ad‐hoc networks, called energy efficient channel aware ad‐hoc on‐demand multipath distance vector routing (EECA‐AOMDV). EECA‐AOMDV addresses three vital prerequisites of mobile ad‐hoc networks: energy effectiveness, unwavering quality and dragging out system lifetime. The proposed energy efficient channel mindful AOMDV (EECA‐AOMDV) utilizes the channel normal nonfading span and nodal residual energy as directing metric to choose the stable route for way revelation. The key thought of the convention is to discover average channel nonfading duration and maximum nodal residual energy as routing metrics of each course during the time spent choosing way and sort the multi course by slipping channel nonfading duration and nodal leftover energy.