bluuebunny/crossref_metadata_2025_split huggingface dataset:
High‐Voltage Li‐Ion Full‐Cells with Ultralong Term Cycle Life at Elevated Temperature
Authors: Qiao Yu , He Yibo , Jiang Kezhu , Liu Yang , Li Xiang , Jia Min , Guo Shaohua , Zhou Haoshen 
Published: October 2018

AbstractIn order to meet the ever‐growing demand for energy and power densities in rechargeable lithium‐ion batteries for electric vehicles, intensive research efforts are focusing on increasing output voltage and maintaining high capacity. However, the trade‐off for higher voltage is sacrificing the service life of the batteries, since the detrimentally oxidative degradation on the high‐potential cathode side would inevitably poison the whole cell. Thus, optimizing strategies for full‐cells must take into account, cathode/anode‐electrolyte compatibilities, electrochemical reversibility, and even thermal stability for practical applications, which spurs a hierarchical design for full‐cell architecture. Benefitting from its superior oxidative stability, ionic liquid (Li/Pyr13TFSI) is employed as catholyte, and equimolar LiTFSI/G3 complex is used as anolyte due to its high graphite‐intercalation‐chemistry reversibility. Segregated by a metal–organic‐framework‐based separator, advantages and drawbacks of each electrolyte systems can be synergistically tuned within their isolated environments. Encouragingly, assembled by this hybrid‐electrolytes strategy, a LiNi0.5Mn1.5O4 (5 V‐class)/graphite Li‐ion full‐cell holds an ultrahigh capacity retention rate of 83.8% over 1000 cycles at harsh elevated temperature.
Tuning the Electron Density of Aromatic Solvent for Stable Solid‐Electrolyte‐Interphase Layer in Carbonate‐Based Lithium Metal Batteries
Authors: Yoo Dong‐Joo , Yang Sungyun , Yun Yang Sik , Choi Jin Hyeok , Yoo Dongwon , Kim Ki Jae , Choi Jang Wook 
Published: October 2018

AbstractLithium metal has been hailed as a key enabler of upcoming rechargeable batteries with high energy densities. Nonetheless, uncontrolled dendritic growth and resulting formation of a nonuniform solid‐electrolyte‐interphase (SEI) layer constitute an ever‐challenging obstacle in long‐term cyclability and safety. So far, these drawbacks have been addressed mainly by using noncarbonate electrolytes based on their relatively mild decomposition under reductive environments. Here, toluene as a co‐solvent of carbonate‐based electrolytes for lithium metal anodes is reported. The electron‐donating nature of the methyl group of toluene shifts the reduction of toluene prior to that of commonly used carbonate solvents, resulting in a more uniform and rigid SEI layer. Moreover, the polymerization process of toluene induces the decomposition of the bis(fluorosulfonyl)imide (FSI) anion in LiFSI salt to yield uniform distribution of lithium fluoride (LiF), and thus lowers an onset salt concentration in realizing the so‐called “high‐concentration effect” to 3 molar concentration, instead of 5 molar concentration as in typical electrolyte cases. This investigation reveals the usefulness of aromatic compounds in improving the stability of the SEI layer in lithium metal anodes, particularly by tuning the electron density of the benzene ring.
Anionic Redox Activity in a Newly Zn‐Doped Sodium Layered Oxide P2‐Na2/3Mn1−yZnyO2 (0 < y < 0.23)
Authors: Bai Xue , Sathiya Mariyappan , Mendoza‐Sánchez Beatriz , Iadecola Antonella , Vergnet Jean , Dedryvère Rémi , Saubanère Matthieu , Abakumov Artem M. , Rozier Patrick , Tarascon Jean‐Marie 
Published: October 2018

AbstractThe revival of the Na‐ion battery concept has prompted intense research activities toward new sustainable Na‐based insertion compounds and their implementation in full Na‐ion cells. Efforts are parted between Na‐based polyanionic and layered compounds. For the latter, there has been a specific focus on Na‐deficient layered phases that show cationic and anionic redox activity similar to a Na0.67Mn0.72Mg0.28O2 phase. Herein, a new alkali‐deficient P2‐Na2/3Mn7/9Zn2/9O2 phase using a more electronegative element (Zn) than Mg is reported. Like its Mg counterpart, this phase shows anionic redox activity and no O2 release despite evidence of cationic migration. Density functional theory (DFT) calculations show that it is the presence of an oxygen nonbonding state that triggers the anionic redox activity in this material. The phase delivers a reversible capacity of 200 mAh g−1 in Na‐half cells with such a value be reduced to 140 mAh g−1 in full Na‐ion cells which additionally shows capacity decay upon cycling. These findings establish Na‐deficient layered oxides as a promising platform to further explore the underlying science behind O2 release in insertion compounds based on anionic redox activity.
Using Slack to Facilitate Virtual Small Groups for Individualized Interactive Instruction
Authors: Hill Jeffery , LaFollette Ryan , Grosso Riley , Axelson Daniel , Hart Kimberly , McDonough Erin 
Published: October 2018

AbstractIndividualized interactive instruction provides an opportunity for significant innovation and advances in curriculum design. We describe the development and implementation of virtual small group exercises into the curriculum of an emergency medicine residency training program using a free social media and communication platform (Slack). Two virtual small group exercises, one case‐based and one open‐ended, were trialed during the 2016 to 2017 academic year. We found that the exercises were feasible to implement in a learner group where 66% (41/62) had little or no prior experience with Slack. There was a trend toward a more favorable rating of the quality of the dialogue and of the task‐technology fit for the case‐based format as opposed to the open‐ended educational activity.
Sharing Positive Experiences Boosts Resilient Thinking: Everyday Benefits of Social Connection and Positive Emotion in a Community Sample
Authors: Arewasikporn Anne , Sturgeon John A. , Zautra Alex J. 
Published: October 2018

AbstractThe influence of shared enjoyment and positive affect (PA) on resilient thinking was examined in 191 middle‐aged adults (40–65 years), participating in a study of resilience. Participants completed diaries assessing positive events, shared enjoyment, PA, and resilient cognitions (RC). Multilevel structural equation modeling was utilized to examine when and who engages in RC. Participants reported more RC on days they experienced more positive experiences. This relationship was explained by shared enjoyment and PA. Level‐1 proportional reduction of variance (PRV) for shared enjoyment, PA, and RC was 9%, 10%, and 35%, respectively. Individuals reporting more positive experiences trended toward a more resilient mindset; PA accounted for this relationship. Shared enjoyment mediated the relationship between interpersonal events and PA. These findings suggest PA is integral to having a resilient mindset, and shared enjoyment is a potential mechanism that may influence PA. Level‐2 PRV for shared enjoyment, PA, and RC was 22%, 21%, and 55%, respectively. RC were associated with less depression and anxiety; and greater well‐being, vitality, and physical functioning at follow‐up.
Universal Single‐Qubit Nonadiabatic Holonomic Quantum Gates on an Optomechanical System
Authors: Chen Shan‐Shan , Zhang Hao , Song Xue‐Ke , Deng Fu‐Guo , Wang Hai‐Bo , Yang Guo‐Jian 
Published: October 2018

AbstractThe nonadiabatic holonomic quantum computation has attracted much attention in recent years because of its fastness and robustness. Here, the first scheme to realize theoretically universal single‐qubit gates on an optomechanical system working with nonadiabatic geometric phases is proposed. These quantum gates are robust to the control errors and parameter fluctuations. They can be used to achieve efficiently both quantum state transfer and entanglement generation between two optical modes via the intermediate action of a mechanical mode, showing that they are useful in robust quantum information processing.
Hydrogen Atom Transfer Reactions via Photoredox Catalyzed Chlorine Atom Generation
Authors: Rohe Samantha , Morris Avery O. , McCallum Terry , Barriault Louis 
Published: October 2018

AbstractThe selective functionalization of chemically inert C−H bonds remains to be fully realized in achieving organic transformations that are redox‐neutral, waste‐limiting, and atom‐economical. The catalytic generation of chlorine atoms from chloride ions is one of the most challenging redox processes, where the requirement of harsh and oxidizing reaction conditions renders it seldom utilized in synthetic applications. We report the mild, controlled, and catalytic generation of chlorine atoms as a new opportunity for access to a wide variety of hydrogen atom transfer (HAT) reactions owing to the high stability of HCl. The discovery of the photoredox mediated generation of chlorine atoms with Ir‐based polypyridyl complex, [Ir(dF(CF3)ppy)2(dtbbpy)]Cl, under blue LED irradiation is reported.
Two Ho(III) and Co(II) complexes constructed from bis(triazol‐1‐yl)benzoic acid with structurally similar carboxyl ligands: Syntheses, structures and biological activities
Authors: Zhu Ming‐Chang , Wang Ning , Meng Bo , Su Jun‐qi , Peng Ting‐ting , Qi Zhen‐zhen , Jia Bing , Feng Yun‐hui , Gao En‐Jun 
Published: October 2018

Two new complexes, [Ho(L)2NO3]n (1) and [Co(L′)2Cl4]n (2) (HL = 3,5‐bis(triazol‐1‐yl)benzoic acid, HL′ = 2,4‐bis(triazol‐1‐yl)benzoic acid), have been synthesized and characterized. Interactions with DNA through absorption titration experiments, fluorescence spectra, viscosity measurements and a molecular docking study were examined. The results suggested that complexes 1 and 2 interact with DNA in a partial intercalation mode. DNA binding affinity was determined using kb values, which indicated that the binding activity of the complexes to DNA was complex 2 (kb = 1.93 × 104) > complex 1 (kb = 1.06 × 104). Gel electrophoresis assay demonstrated that the complexes have the ability to cleave pBR322 DNA. Apoptotic assay indicated that the complexes can induce programmed death of Hela cells (human cervix carcinoma cells). A cytotoxicity study indicated that complex 2 shows a greater inhibitory rate of Hela cells than complex 1 and the cytotoxicity of both 1 and 2 showed time dependence. Especially, the efficacy of complex 2 was shown to be higher than that of cisplatin at 72 h.
Preparation and characterization of a binary‐graft‐based, water‐absorbing dust suppressant for coal transportation
Authors: Bao Qiu , Nie Wen , Liu Changqi , Liu Yanghao , Zhang Haihan , Wang Hongkun , Jin Hu 
Published: October 2018

ABSTRACTDuring coal transportation, a large amount of coal dust is generated; this not only leads to a massive loss of coal but also causes severe environmental pollution. In this research, we used a chemical modification approach to prepare a highly water‐absorbing dust suppressant. Corn starch, as the main ingredient, was copolymerized with acrylic acid and acrylamide, and acrylic acid and acrylamide were used to form a starch graft copolymer. Subsequently, in this research, we designed a suite of single‐factor experiments using the viscosity as the metric to determine the optimal reaction conditions, which were as follows: mass ratio of acrylic acid to acrylamide = 3:2, neutrality = 50%, reaction time = 3 h, and reaction temperature = 50 °C. Tests were carried out to assess the viscosity, water retention, and anti‐evaporation performance of the dust suppressant. The results indicate that when the dust‐suppressant concentration was 6%, the performance was optimized. Also, the anti‐evaporation behavior of the suppressant improved with the dust‐suppressant concentration. The use of this dust suppressant during coal transportation could greatly reduce dust dispersion and lead to improved environmental protection. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci.2019,136, 47065.
Modeling of interdiffusion in poly(vinyl acetate)–poly(methyl methacrylate)–toluene multicomponent systems
Authors: Raupp Sebastian M. , Kitz Paul G. , Siebel David K. , Wunsch Alexander , Merklein Lisa , Scharfer Philip , Schabel Wilhelm 
Published: October 2018

ABSTRACTWork on interdiffusion has been mainly carried out in binary systems in the past, and this work has focused on polymer–solvent (S) systems and polymer blends. To understand and predict the interdiffusion of two solids in the presence of one S, we present a new mathematical model based on the Onsager approach. Within our model, interdiffusion kinetics are described with a modification of the reptation model for long polymer chains, and the chemical potential gradient is used as the driving force behind mass transfer. The chemical potential is calculated with a Flory–Huggins approach. The model was validated with 29 Raman spectroscopy experiments in poly(vinyl acetate)–poly(methyl methacrylate)–toluene systems at 20 °C. Monomer mobilities (L
i,0s) were determined for both polymers to show the independence of L
i,0 from the chain length. The L
i,0s were found to be strongly dependent on the S content. With the knowledge of phase equilibria and L
i,0s, interdiffusion in the ternary polymer–polymer–S system could be predicted by the introduced model. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47092.
Effect of D‐lactide content of annealed poly(lactic acid) on its thermal, mechanical, heat deflection temperature, and creep properties
Authors: Tábi T. , Wacha A. F. , Hajba S. 
Published: October 2018

AbstractIn our research, the effect of D‐lactide content in injection‐molded and annealed poly(lactic acid) (PLA) was investigated for crystallinity as well as crystalline forms (less‐ordered α′ and more‐ordered α crystalline forms) and thus on the mechanical, heat deflection temperature (HDT), and creep properties. Three different PLA grades 3052D, 3001D, and 3100HP were investigated with D‐lactide contents of 4%, 1.4%, and 0.5%, respectively. The injection‐molded PLA specimens were then postproduction annealed in a heat chamber at 80–140 °C for 1 h to develop various crystallinities and various ratios of α′ and α crystal forms. It was demonstrated that not only annealing but also the D‐lactide content significantly influences the crystallization, crystal structure, and accordingly properties of PLA like notched Charpy impact strength, HDT, and creep characteristics. Higher HDT, impact properties, and creep resistance could be reached by using PLA with lower D‐lactide content with a certain annealing temperature range to develop definite crystal structures. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47103.
Enhanced properties of poly(styrene–b–ethylene–co–butylene–b–styrene) nanocomposites with in situ construction of interconnected graphene network
Authors: Yue Jia , Pan Jinkai , Deng Yuhao , Li Jie , Bao Jianjun 
Published: October 2018

ABSTRACTIn this work, such elastomeric nanocomposites were fabricated with graphene (GE) sheets selectively distributing between polymer matrices and forming three‐dimensional networks. The solvent evaporation process was first introduced to produce poly(styrene–ethylene–co–butadiene–b–styrene) (SEBS) microspheres and then reduced GE oxide attached to the surface of SEBS microspheres via electrostatic interaction and sonication‐assisted reduction. The microstructure of nanocomposites, prepared by compression molding using SEBS/GE microspheres, was investigated using scanning electron microscopy and transmission electron microscopy. The results showed that interconnected GE networks formed in heat‐pressing composite and was destroyed after twin‐roll mixing. The SEBS/GE nanocomposites showed enhanced electrical, thermal, and mechanical properties. The electrical resistivity of nanocomposites obtained via heat‐pressing reached to 1.1 × 103 Ω m at a 2.5 wt % (1.07 vol %) content of GE. The thermal and mechanical properties were also characterized. It was found that the initial degradation temperature increased by nearly 40 °C and the mechanical properties continued to rise with GE content below 0.5 wt %. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47118.
Spinning of hydroalcoholic chitosan solutions: Mechanical behavior and multiscale microstructure of resulting fibers
Authors: Desorme M. , Montembault A. , Tamet T. , Maleysson P. , Bouet T. , David L. 
Published: October 2018

ABSTRACTThe morphology and mechanical properties of chitosan fibers obtained by spinning of hydroalcoholic (1,2propanediol/water) chitosan solutions of low DA and high molecular mass are reported. The impact of processing parameters on final fiber properties, such as fiber stretching at different steps of the spinning process, is investigated. A stretching ratio applied during the fiber coagulation appeared to have no significant effect on mechanical properties, whereas fiber drawing after the coagulation step, that is, during the washing step was a key parameter for the control of macromolecular orientation, fiber tenacity, and Young's modulus. The microstructure and morphology of the various as‐spun chitosan fibers were studied by means of wide‐angle and small‐angle X‐ray scattering and scanning electron microscopy. Microstructure impacts mechanical properties from the interplay of different deformation mechanisms acting at different length scales of the microstructure, namely the macromolecular orientation, the semicrystalline morphology, and the core–shell structure. The obtained monofilament fibers (45–70D) can be knitted. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47130.
Dry‐jet wet electrospinning of native cellulose microfibers with macroporous structures from ionic liquids
Authors: Bazbouz Mohamed Basel , Taylor Mark , Baker Daniel , Ries Michael E. , Goswami Parikshit 
Published: October 2018

ABSTRACTIn this study, we have provided a review of electrospun cellulose micro/nanofibers from ionic liquids (ILs) and cosolvents from which we identify a lack of previous studies focusing on the structural morphology of the dry‐jet wet electrospun native cellulose fibers from ILs. We have therefore aimed to investigate factors influencing the structural morphology of cellulose/IL electrospun fibers and investigate the coagulation parameters on this morphology. The electrospinning of 10% w/v cellulose/([C2MIM][OAc]/MIM) (1/1, v/v) solution was shown to produce macroporous fibers with average diameters of 2.8 ± 1.4 μm with pore sizes from 100 to 200 nm. We have found that coagulation bath type and immersion time affect the morphological structure of the electrospun fibers. The fiber spinnability, formation, and morphological structure are mainly dependent on the method used to collect and coagulate/solidify the fibers. The physical properties of the dissolved cellulose were measured and these are discussed in terms of the solution spinnability. The structural morphology of the electrospun cellulose fibers was characterized by scanning electron microscopy, and finally the extraction of IL from the fiber body was confirmed by nuclear magnetic resonance. The electrospun cellulose fibers morphology shows the formation of both micron and nanometer sized fibers with different morphological “macroporous” structures. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47153.
Effect of hydrophilic poly(ethylene glycol) methyl ether additive on the structure, morphology, and performance of polysulfone flat sheet ultrafiltration membrane
Authors: Saini Bharti , Sinha Manish Kumar 
Published: October 2018

ABSTRACTIn this work, effects of hydrophilic poly(ethylene glycol) methyl ether (PEGME) 5000 additive on the structure, morphology, and performance of polysulfone (PSF) membrane have been investigated. The membranes are prepared with direct blending of PEGME5000 (0–9 wt %) with two compositions of PSF (12 and 15 wt %) into N‐methyl‐2‐pyrrolidone and further characterized in terms of morphology, structure, fouling, and ultrafiltration performance. The ternary phase diagram is plotted to investigate the thermodynamic stability of the system. Moreover, protein adsorption tests are conducted using bovine serum albumin (BSA) to see the effect of PEGME5000 on surface hydrophilicity. The ultrafiltration experiments are performed using humic acid (HA) solution and oil‐in‐water (o/w) emulsion. The result showed that, the contact angle decreased from 64° to 46° and from 67.6° to 49° for 12M and 15M membranes, respectively, indicating an improved hydrophilicity. The 12M and 15M membranes with 9 wt % of PEGME5000 have the lowest BSA adsorption due to highest antifouling property. The maximum permeability was obtained 0.72 and 0.51 L/m2 h kPa for 12M5 and 15M3, respectively, due to maximum porosity which is also supported by the morphological result. In HA permeation, 12M5 and 15M3 achieved a maximum Flux
RR around 0.95 and 0.91, respectively, which was remarkably higher compared to 0.61 and 0.62 Flux
RR of 12M0 and 15M0. Also, PEGME5000 significantly affected the structure and morphology of the membranes. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47163.
Study of the release kinetics of (−) epicatechin: Effect of its location within the fiber or sphere
Authors: López‐Peña I. Y. , Castillo‐Ortega M. M. , Plascencia‐Martínez D. F. , Félix‐Núñez A. , Rodríguez‐Félix D. E. , Del Castillo‐Castro T. , Encinas‐Encinas J. C. , Santacruz‐Ortega H. , Rodríguez‐Félix F. , Cauich‐Rodríguez J. V. , Burruel‐Ibarra S. , Hernandez‐Martínez D. , Quiroz‐Castillo J. M. 
Published: October 2018

ABSTRACTThe (−) epicatechin (Epi) is a flavonoid with antioxidant and regenerative properties for cardiac tissue. In this work, a study of release assays and their corresponding adjustments to models was performed to determine the mechanism of (−) Epi release in the cellulose acetate (CA)–polyvinylpyrrolidone (PVP) system. The morphology of the material was considered, fibers, or spheres, as well as the possible chemical interactions between Epi, PVP, and CA. It was observed that in the systems in which the PVP is present, a high release is observed in comparison with those that only contained CA and (−) Epi, which showed very low release. This difference can be explained considering the possible hydrogen bond interaction between CA and (−) Epi, as well as the insolubility of the CA, in the release medium. The factors that have an important effect on the release of (−) Epi in the different systems are: the morphology, a faster release in morphologies with greater surface area, and the chemical interactions that can be formed among the (−) Epi and the components of the matrix. Another factor is the solubility of the components in the release medium, which allows the diffusion and drag phenomena to be observed simultaneously. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci.2019,136, 47166.
Polyketide and Prenylxanthone Derivatives from the Endophytic Fungus Aspergillus sp. TJ23
Authors: Qiao Yuben , Tu Kun , Feng Wenya , Liu Junjun , Xu Qianqian , Tao Li , Zhu Hucheng , Chen Chunmei , Wang Jianping , Xue Yongbo , Zhang Yonghui 
Published: October 2018

AbstractEight secondary metabolites, including a new polyketide, named asperetide (1) and a new prenylxanthone derivative, called asperanthone (4), and six known compounds, (S)‐3‐butyl‐7‐methoxyphthalide (2), ruguloxanthone C (3), tajixanthone hydrate (5), tajixanthone methanoate (6), salimyxin B (7), and ergosterol (8), were isolated and identified from the medicinal plant‐derived fungus, Aspergillus sp. TJ23. The new structures and their absolute configurations were elucidated via multiple methods, including 1D‐ and 2D‐NMR, HR‐ESI‐MS, UV, IR, and the electronic circular dichroism (ECD) calculations. All of the isolates were characterized from the strain for the first time. The in vitro bioassay showed that compounds 3–5 and 8 exerted inhibitory activities against five cancer cell lines (B16, MDA‐MB‐231, 4T1, HepG2, and LLC) with IC50 values ranging from 5.13 to 36.8 μm.