bluuebunny/crossref_metadata_2025_split huggingface dataset:
Low‐cost, environmentally friendly route to produce glass fiber‐reinforced polymer composites with microfibrillated cellulose interphase
Authors: Uribe B. E. B. , Carvalho A. J. F. , Tarpani J. R. 
Published: August 2016

ABSTRACTIn this article, an easy, effective, and eco‐friendly method to improve the mechanical performance of glass fiber‐reinforced polymer composites is proposed, which involves the coating of unsized glass fiber fabric layers by simple immersion in an aqueous suspension containing sugarcane bagasse microfibrillated cellulose (MFC), followed by vacuum‐assisted liquid resin infusion as the processing method. From atomic force microscopy, a 250 nm MFC‐rich interphase was found, revealing its ability to build micro‐ and nanobridges acting as bulk epoxy matrix and GF linker. The interlaminar shear strength, quasi‐static tensile, and flexural tests, as well as the morphological and fractographic inspection of test coupons containing the secondary substructure, broadly supported the assumption of the efficient role on the interfacial level of this nano reinforcement by enhancing the load transference and distribution from the polymer matrix to the main reinforcing fiber system compared to baseline unsized fiber‐reinforced epoxy laminates. This finding permits this class of composite materials to be considered as having great potential to achieve products with excellent performance/cost ratios. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 44183.
Crystallization kinetics, mechanical properties, and hydrolytic degradation of novel eco‐friendly poly(butylene diglycolate) containing ether linkages
Authors: Jiang Feiyuan , Qiu Zhaobin 
Published: August 2016

ABSTRACTThe basic thermal properties, isothermal melt crystallization kinetics, spherulitic morphology, mechanical properties, and hydrolytic degradation behavior of a novel eco‐friendly polyester poly(butylene diglycolate) (PBDG) containing ether linkages were systematically studied with several techniques in this research. PBDG is an aliphatic polyester with high thermal stability. It had a glass transition temperature (Tg) of −25.7 °C, a melting point temperature of 65.1 °C, and an equilibrium melting point of 73.2 °C. During the isothermal melt crystallization, PBDG crystallized slowly with increasing crystallization temperature, but the crystallization mechanism did not change. Negative spherulites were observed for PBDG. The mechanical properties of PBDG were investigated from the tensile testing. As a ductile polyester, PBDG possessed good mechanical properties. PBDG also showed a fast hydrolytic degradation rate. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 44186.
Multiplex 16S rRNA‐derived geno‐biochip for detection of 16 bacterial pathogens from contaminated foods
Authors: Shin Hwa Hui , Hwang Byeong Hee , Cha Hyung Joon 
Published: August 2016

AbstractFoodborne diseases caused by various pathogenic bacteria occur worldwide. To prevent foodborne diseases and minimize their impacts, it is important to inspect contaminated foods and specifically detect many types of pathogenic bacteria. Several DNA oligonucleotide biochips based on 16S rRNA have been investigated to detect bacteria; however, a mode of detection that can be used to detect diverse pathogenic strains and to examine the safety of food matrixes is still needed. In the present work, a 16S rRNA gene‐derived geno‐biochip detection system was developed after screening DNA oligonucleotide specific capture probes, and it was validated for multiple detection of 16 pathogenic strains that frequently occur with a signature pattern. rRNAs were also used as detection targets directly obtained from cell lysates without any purification and amplification steps in the bacterial cells separated from 8 food matrixes by simple pretreatments. Thus, the developed 16S rRNA‐derived geno‐biochip can be successfully used for the rapid and multiple detection of the 16 pathogenic bacteria frequently isolated from contaminated foods that are important for food safety.
A versatile modular bioreactor platform for Tissue Engineering
Authors: Schuerlein Sebastian , Schwarz Thomas , Krziminski Steffan , Gätzner Sabine , Hoppensack Anke , Schwedhelm Ivo , Schweinlin Matthias , Walles Heike , Hansmann Jan 
Published: August 2016

AbstractTissue Engineering (TE) bears potential to overcome the persistent shortage of donor organs in transplantation medicine. Additionally, TE products are applied as human test systems in pharmaceutical research to close the gap between animal testing and the administration of drugs to human subjects in clinical trials. However, generating a tissue requires complex culture conditions provided by bioreactors. Currently, the translation of TE technologies into clinical and industrial applications is limited due to a wide range of different tissue‐specific, non‐disposable bioreactor systems. To ensure a high level of standardization, a suitable cost‐effectiveness, and a safe graft production, a generic modular bioreactor platform was developed. Functional modules provide robust control of culture processes, e.g. medium transport, gas exchange, heating, or trapping of floating air bubbles. Characterization revealed improved performance of the modules in comparison to traditional cell culture equipment such as incubators, or peristaltic pumps. By combining the modules, a broad range of culture conditions can be achieved. The novel bioreactor platform allows using disposable components and facilitates tissue culture in closed fluidic systems. By sustaining native carotid arteries, engineering a blood vessel, and generating intestinal tissue models according to a previously published protocol the feasibility and performance of the bioreactor platform was demonstrated.
Dioxygen Activation by a Hexagonal SrMnO3 Perovskite Catalyst for Aerobic Liquid‐Phase Oxidation
Authors: Kawasaki Shuma , Kamata Keigo , Hara Michikazu 
Published: August 2016

AbstractHeterogeneous catalysts, which allow a reductive activation of dioxygen (O2) under mild reaction conditions, are promising candidates for highly efficient aerobic oxidation. An effective hexagonal SrMnO3 (SMO) perovskite catalyst for liquid‐phase selective oxidation with O2 was successfully synthesized by the polymerized complex method. The activity of SMO for the aerobic oxidation of alcohols was higher than those of typical manganese oxide‐based catalysts and was heterogeneous, so that the recovered catalyst could be reused without heat treatment under oxidative conditions while keeping its high catalytic performance. The reversible reaction on the surface Mn species on SMO with O2 leads to the formation of Mn–superoxo species, which catalyze the selective oxidative transformation of various types of organic substrates into the desired oxygenated or dehydrogenated products.
Sol–Gel Immobilized N‐Heterocyclic Carbene Gold Complex as a Recyclable Catalyst for the Rearrangement of Allylic Esters and the Cycloisomerization of γ‐Alkynoic Acids
Authors: Ferré Meritxell , Cattoën Xavier , Wong Chi Man Michel , Pleixats Roser 
Published: August 2016

AbstractThe synthesis of a bis‐silylated (NHC)AuCl (NHC=N‐heterocyclic carbene) complex and the formation of a hybrid silica material by the sol–gel process by cogelification with tetraethylorthosilicate under fluoride catalysis are described. This material was characterized by using 29Si solid‐state NMR spectroscopy, N2 sorption measurements, electron microscopy, and elemental analysis. It was tested as a reusable catalyst in the rearrangement of allylic esters in conjunction with a silver salt under microwave conditions and it displayed a much better performance than a homogeneous analogue. This catalyst is active and recyclable in the cycloisomerization of γ‐alkynoic acids to five‐membered enol‐lactones at room temperature in two reaction media, a toluene/water biphasic system and a deep eutectic solvent.
Glycoluril‐Derived Molecular Clips are Potent and Selective Receptors for Cationic Dyes in Water
Authors: She Nengfang , Moncelet Damien , Gilberg Laura , Lu Xiaoyong , Sindelar Vladimir , Briken Volker , Isaacs Lyle 
Published: August 2016

AbstractMolecular clip 1 remains monomeric in water and engages in host–guest recognition processes with suitable guests. We report the Ka values for 32 1⋅guest complexes measured by 1H NMR, UV/Vis, and fluorescence titrations. The cavity of 1 is shaped by aromatic surfaces of negative electrostatic potential and therefore displays high affinity and selectivity for planar and cationic aromatic guests that distinguishes it from CB[n] receptors that prefer aliphatic over aromatic guests. Electrostatic effects play a dominant role in the recognition process whereby ion–dipole interactions may occur between ammonium ions and the C=O groups of 1, between the SO3− groups of 1 and pendant cationic groups on the guest, and within the cavity of 1 by cation–π interactions. Host 1 displays a high affinity toward dicationic guests with large planar aromatic surfaces (e.g. naphthalene diimide NDI+ and perylene diimide PDI+) and cationic dyes derived from acridine (e.g. methylene blue and azure A). The critical importance of cation–π interactions was ascertained by a comparison of analogous neutral and cationic guests (e.g. methylene violet vs. methylene blue; quinoline vs. N‐methylquinolinium; acridine vs. N‐methylacridinium; neutral red vs. neutral red H+) the affinities of which differ by up to 380‐fold. We demonstrate that the high affinity of 1 toward methylene blue (Ka=3.92×107 m−1; Kd=25 nm) allows for the selective sequestration and destaining of U87 cells stained with methylene blue.
Identification of Limonol Derivatives as Heat Shock Protein 90 (Hsp90) Inhibitors through a Multidisciplinary Approach
Authors: Chini Maria G. , Malafronte Nicola , Vaccaro Maria C. , Gualtieri Maria J. , Vassallo Antonio , Vasaturo Michele , Castellano Sabrina , Milite Ciro , Leone Antonietta , Bifulco Giuseppe , De Tommasi Nunziatina , Dal Piaz Fabrizio 
Published: August 2016

AbstractThe identification of inhibitors of Hsp90 is currently a primary goal in the development of more effective drugs for the treatment of various types of multidrug resistant malignancies. In an attempt to identify new small molecules modulating the activity of Hsp90, we screened a small library of tetranortriterpenes. A high‐affinity interaction with Hsp90 inducible form was uncovered for eight of these compounds, five of which are described here for the first time. By monitoring the ATPase activity and the citrate synthase thermal induced aggregation, compound 1 (cedrelosin A), 3 (7α‐limonylacetate), and 5 (cedrelosin B), containing a limonol moiety, were found to be the most effective in compromising the Hsp90α chaperone activity. Consistent with these findings, the three compounds caused a depletion of c‐Raf and pAkt Hsp90 client proteins in HeLa and MCF/7 cell lines. Induced fit docking protocol and molecular dynamics were used to rationalize the structural basis of the biological activity of the limonol derivatives. Taken together, these results point to limonol‐derivatives as promising scaffolds for the design of novel Hsp90α inhibitors.
Preparation and Characterization of Antimony and Arsenic Tricyanide and Their 2,2′‐Bipyridine Adducts
Authors: Deokar Piyush , Leitz Dominik , Stein Trent H. , Vasiliu Monica , Dixon David A. , Christe Karl O. , Haiges Ralf 
Published: August 2016

AbstractThe arsenic(III) and antimony(III) cyanides M(CN)3 (M=As, Sb) have been prepared in quantitative yields from the corresponding trifluorides through fluoride–cyanide exchange with Me3SiCN in acetonitrile. When the reaction was carried out in the presence of one equivalent of 2,2′‐bipyridine, the adducts [M(CN)3⋅(2,2′‐bipy)] were obtained. The crystal structures of As(CN)3, [As(CN)3⋅(2,2′‐bipy)] and [Sb(CN)3⋅(2,2′‐bipy)] were determined and are surprisingly different. As(CN)3 possesses a polymeric three‐dimensional structure, [As(CN)3⋅(2,2′‐bipy)] exhibits a two‐dimensional sheet structure, and [Sb(CN)3⋅(2,2′‐bipy)] has a chain structure, and none of the structures resembles those found for the corresponding arsenic and antimony triazides.
Low Molecular Weight Norbornadiene Derivatives for Molecular Solar‐Thermal Energy Storage
Authors: Quant Maria , Lennartson Anders , Dreos Ambra , Kuisma Mikael , Erhart Paul , Börjesson Karl , Moth‐Poulsen Kasper 
Published: August 2016

AbstractMolecular solar‐thermal energy storage systems are based on molecular switches that reversibly convert solar energy into chemical energy. Herein, we report the synthesis, characterization, and computational evaluation of a series of low molecular weight (193–260 g mol−1) norbornadiene–quadricyclane systems. The molecules feature cyano acceptor and ethynyl‐substituted aromatic donor groups, leading to a good match with solar irradiation, quantitative photo‐thermal conversion between the norbornadiene and quadricyclane, as well as high energy storage densities (396–629 kJ kg−1). The spectroscopic properties and energy storage capability have been further evaluated through density functional theory calculations, which indicate that the ethynyl moiety plays a critical role in obtaining the high oscillator strengths seen for these molecules.
A Highly Chemically Stable Metal–Organic Framework as a Luminescent Probe for the Regenerable Ratiometric Sensing of pH
Authors: Wang Jian , Li Yang , Jiang Min , Liu Yanhong , Zhang Lingwen , Wu Pengyan 
Published: August 2016

AbstractA heteroatom‐rich 3D noninterpenetrating metal–organic framework (MOF) Cd‐EDDA constructed from an ethylene glycol ether bridging tetracarboxylate ligand H4EDDA (5,5′‐(ethane‐1,2‐diylbis(oxy))diisophthalic acid) shows good chemical resistance to both acidic and alkaline solutions with a pH ranging from 2.0 to 12.2. There is a corresponding ratiometric luminescence response to pH from 2.0 to 11.5, and the sensing mechanism is also discussed through ion chromatography and molecular force field‐based calculations. Importantly, the probe can easily be regenerated simply by modulating the pH of the solution, thus being the first example of a regenerable MOF‐based ratiometric luminescent probe for pH.
Ruthenium‐Catalyzed Methylation of Amines with Paraformaldehyde in Water under Mild Conditions
Authors: van der Waals Dominic , Heim Leo. E. , Gedig Christian , Herbrik Fabian , Vallazza Simona , Prechtl Martin H. G. 
Published: August 2016

AbstractMethylated amines are highly important for a variety of pharmaceutical and agrochemical applications. Existing routes for their formation result in the production of large amounts of waste or require high reaction temperatures, both of which impact the ecological and economical footprint of the methodologies. Herein, we report the ruthenium‐catalyzed reductive methylation of a range of aliphatic amines, using paraformaldehyde as both substrate and hydrogen source, in combination with water. This reaction proceeds under mild aqueous reaction conditions. Additionally the use of a secondary phase for catalyst retention and recycling has been investigated with promising results.
A 63‐dB gain OTA operating in subthreshold with 20‐nW power consumption
Authors: Akbari Meysam , Hashemipour Omid 
Published: August 2016

SummaryThis paper presents a two‐stage bulk‐driven operational transconductance amplifier operating in weak‐inversion region. The proposed amplifier is upgraded using recycling structure, current shunt technique, positive feedback source degeneration and indirect frequency compensation feedback to enhance transconductance under a reasonable stability. Combining these approaches leads to an ultra‐low‐power high performance amplifier without increasing power dissipation compared to the conventional one. Simulation results in 0.13‐µm complementary metal–oxide–semiconductor technology show the proposed structure achieves a 63‐dB DC gain at 0.25‐V supply voltage with just 20‐nW power dissipation. Copyright © 2016 John Wiley & Sons, Ltd.
The Role of Trade Associations in Environmental Compliance Under Limited Enforcement: The case of small businesses
Authors: Lee Eungkyoon , Jung Chan Su , Kwak Jooyoung 
Published: August 2016

AbstractAlthough a substantial body of research has considered the role of non‐state actors in establishing regulatory policies, relatively little research has focused on the influence of such actors at the implementation phase. To fill this gap in the literature, we extend the research on compliance motivations and institutional theory by exploring the role of trade associations in facilitating environmental compliance of small businesses, an area in which the problem of limited enforcement is particularly acute. Using data from dry‐cleaning facilities, we investigate the ways in which a trade association contributes to improvements in environmental performance among its members. The results reveal that the trade association can promote compliance by helping its members to become familiar with regulatory requirements and to develop technical capacity to meet them. Based on the findings, we propose ways to increase the practical involvement of non‐state actors to compensate for enforcement shortfalls. Copyright © 2016 John Wiley & Sons, Ltd and ERP Environment
Electrochemical Characterization of Biochemically Active Cu(II) Mixed Ligand Complex with Histidine and Cysteine
Authors: Mlakar Marina , Pavković Sonja , Tumir Lidija‐Marija , Vukosav Petra , Gašparović Blaženka 
Published: August 2016

AbstractCopper(II) complexes with cysteine and histidine, amino acids that coordinate copper(II) in human body, were investigated. Cu‐His and Cu‐Cys complexes were detected in pH range from 5.0 to 9.0 using voltammetric techniques. [CuHis2] complex reduces by two‐electron reversible process at ≈−0.40 V, while [CuCys] complex by one‐electron quasireversible process at −0.6 V, revealing strong adsorption at the electrode surface. When both amino acids are present in the solution, new peak appeared at −0.5 V, which corresponded to the [CuHisCys] complex reduction. Formation and characterization of mixed ligand complex was also supported by UV‐Vis spectra recorded at fixed histidine and various cysteine concentrations. Formation of [CuHisCys] complex in the solution was detected and stability constant calculated to amount to log KCuHisCys=16.9±0.3. This study was the first attempt to characterize formation of Cu(II) mixed ligand complexation process with biochemically important amino acids in electron transport and oxygenation reactions in human body.
Development of a New Label‐free, Indicator‐free Strategy toward Ultrasensitive Electrochemical DNA Biosensing Based on Fe3O4 Nanoparticles/Reduced Graphene Oxide Composite
Authors: Teymourian Hazhir , Salimi Abdollah , Khezrian Somayeh 
Published: August 2016

AbstractElectrochemistry offers sensitivity, selectivity and low cost for fabrication of sensors capable of detection of selected DNA targets or mutated genes associated with human disease. In this work, we have developed a novel label‐free, indicator‐free strategy of electrochemical DNA sensor based on Fe3O4 nanoparticles/reduced graphene oxide (Fe3O4/r‐GO) nanocomposite modified electrode. By using Fe3O4/r‐GO nanocomposite as a substrate to immobilize probe DNA and subsequent hybridization with target sequence to form dsDNA, a great signal amplification was achieved through measuring changes in DPV peak current of underlying Fe(II)/Fe(III) redox system. With the remarkable attomolar sensitivity and high specificity and at the same time, great simplicity, the proposed strategy may find great applications in different DNA assay fields.
On the Use of Dispersive Liquid‐liquid Microextraction Combined with Organic/Water Interface Electrochemistry
Authors: Silva Rejane M. P. , Lima Lucas C. , Gaubeur Ivanise , Suffredini Hugo B. 
Published: August 2016

AbstractIn this paper, we discuss the use of dispersive liquid‐liquid microextraction (DLLME) combined with organic/water interface electrochemistry (OWIE) by using ferrocene as a model‐molecule. A mixture of 150 μL of ethanol (disperser solvent) and 50 μL of 1‐undecanol (extractant solvent) was injected into 9 mL of a ferrocene aqueous solution prepared in 1.0×10−3 mol L−1 H2SO4. Afterward, a drop of the organic phase containing ferrocene was directly inserted on a screen‐printed carbon electrode and the analytical curve was obtained, point‐to‐point, with a good linearity. Besides that, a boron‐doped diamond (BDD) electrode was used to promote the partition coefficient calculation, and it was possible to calculate the final concentrations of ferrocene in the aqueous and organic phases as being equal to 4.2×10−4 mol L−1 and 1.0×10−1 mol L−1, respectively. By using these values, the partition coefficient (log P) was calculated as 2.5±0.1 (n=3), a similar result to that obtained using other methodologies.
Rehabilitation of earthquake damaged external RC beam‐column joints by joint enlargement using prestressed steel angles
Authors: Shafaei Jalil , Hosseini Abdollah , Marefat Mohammad Sadegh , Ingham Jason M. 
Published: August 2016

SummaryThe effectiveness of a rehabilitation method based on joint enlargement using prestressed steel angles to enhance the seismic behavior of damaged external reinforced concrete beam‐column joints was experimentally investigated. Three half‐scale joints having either non‐seismic or seismic reinforcement details were tested both before and after rehabilitation by applying lateral cyclic loading of increasing amplitudes. Two defects were considered for the two non‐seismic units, being the absence of transverse steel hoops and insufficient bond capacity of beam bottom steel reinforcing bars in the joint panel zone. The damaged specimens were rehabilitated by injecting epoxy grout into existing cracks and installing stiffened steel angles at the re‐entrant corners of the beam‐column joint, both above and below the beam, that were mounted and held in place using prestressed high‐tensile strength bars. The test results indicated that the seismic performance of the rehabilitated specimens in terms of strength, stiffness, and ductility was fully recovered and comparable with the performance of the seismically detailed specimen. Copyright © 2016 John Wiley & Sons, Ltd.
Fronthaul data compression for Uplink CoMP in cloud radio access network (C‐RAN)
Authors: Qi Yinan , Shakir Muhammad Zeeshan , Imran Muhammad Ali , Qaraqe Khalid A. , Quddus Atta , Tafazolli Rahim 
Published: August 2016

AbstractThe design of efficient wireless fronthaul connections for future heterogeneous networks incorporating emerging paradigms such as cloud radio access network has become a challenging task that requires the most effective utilisation of fronthaul network resources. In this paper, we propose to use distributed compression to reduce the fronthaul traffic in uplink Coordinated Multi‐Point for cloud radio access network. Unlike the conventional approach where each coordinating point quantises and forwards its own observation to the processing centre, these observations are compressed before forwarding. At the processing centre, the decompression of the observations and the decoding of the user message are conducted in a successive manner. The essence of this approach is the optimisation of the distributed compression using an iterative algorithm to achieve maximal user rate with a given fronthaul rate. In other words, for a target user rate the generated fronthaul traffic is minimised. Moreover, joint decompression and decoding is studied and an iterative optimisation algorithm is devised accordingly. Finally, the analysis is extended to multi‐user case and our results reveal that, in both dense and ultra‐dense urban deployment scenarios, the usage of distributed compression can efficiently reduce the required fronthaul rate and a further reduction is obtained with joint operation. Copyright © 2016 John Wiley & Sons, Ltd.