bluuebunny/crossref_metadata_2025_split huggingface dataset:
El flamenco en la Valencia republicana
Authors: Paulo Selvi Isabel Amparo 
Published: January 2020

Valencia, a principios de 1930, era una ciudad llena de contrastes con una gran oferta cultural y de ocio. Hubo una colonia flamenca valenciana, una afición y un interés empresarial por los espectáculos flamencos. El flamenquismo arraigado en la urbe se sintió diferente al andaluz como arte y reivindicación social (aunque se dio el debate interno entre los estilos puros y los importados). La creación del Café Cantante Villa Rosa y la breve estancia en él de los hermanos Borrull (1931-1934) fue muy significativa. El objetivo es rescatar esa Valencia flamenca olvidada, descubrir la colonia flamenca valenciana y centrar el interés en el Café Cantante de los hermanos Borrull, y muy especialmente en Concha Borrull, su Capitana.
Valencia, at the beginning of 1930, was a city full of contrasts with a great cultural and leisure offer. There was a Valencian flamenco colony, a business interest in flamenco shows. The flamenquismo rooted in the city felt different to the Andalusian flamenco as art and social claim (although there was the internal debate between pure and imported styles). The creation of Café Singer Villa Rosa and the brief stay there of the Borrull brothers (1931-1934) was very significant. The final objective is to rescue that forgotten Flamenco in Valencia, to discover the Valencian flamenco colony and to focus the interest in the Café of the Borrull brothers, and especially in Concha Borrull, its Captain.
(De)form and Function: Measuring Cellular Forces with Deformable Materials and Deformable Structures
Authors: Obenaus Ava M. , Mollica Molly Y. , Sniadecki Nathan J. 
Published: January 2020

AbstractThe ability for biological cells to produce mechanical forces is important for the development, function, and homeostasis of tissue. The measurement of cellular forces is not a straightforward task because individual cells are microscopic in size and the forces they produce are at the nanonewton scale. Consequently, studies in cell mechanics rely on advanced biomaterials or flexible structures that permit one to infer these forces by the deformation they impart on the material or structure. Herein, the scientific progression on the use of deformable materials and deformable structures to measure cellular forces are reviewed. The findings and insights made possible with these approaches in the field of cell mechanics are summarized.
Impacts of cover crop planting dates on soils after four years
Authors: Ruis Sabrina J. , Blanco‐Canqui Humberto , Elmore Roger W. , Proctor Christopher , Koehler‐Cole Katja , Ferguson Richard B. , Francis Charles A. , Shapiro Charles A. 
Published: January 2020

AbstractImpacts of cover crop (CC) mixes and early CC planting on soil properties, CC biomass production, and CC biomass C input are not well understood. We assessed CC planting date (pre‐ or post‐harvest) and CC type (rye [Secale cereale L.], mix of winter pea [Pisum sativum L.], hairy vetch [Vicia villosa L.], rye, and radish [Raphanus sativus L.], or no CC) effects on soil physical properties, organic matter, and CC biomass C input under three no‐till continuous corn (Zea mays L.) and corn‐soybean (Glycine max L.) sites in the eastern Great Plains after 4 yr. Across sites and years, pre‐harvest‐planted CCs produced 0.81 ± 0.52 (mean ± SD), post‐harvest‐planted 0.59 ± 0.44, rye 0.83 ± 0.52, and mix 0.57 ± 0.42 Mg biomass ha−1. Compared to no CC, pre‐ and post‐harvest–planted CC effects varied by site. Pre‐harvest–planted CCs increased wet‐aggregate stability by 17% and particulate organic matter by 31% under continuous corn at one of three sites compared with post‐harvest‐planted CCs. Similarly, the CC mix had variable effects on cone index but reduced bulk density by 7% at one site under continuous corn and increased wet‐aggregate stability by 21% at another site under corn−soybean. Planting date, but not CC type, effects were slightly more evident under continuous corn than corn−soybean. Across sites and years, pre‐harvest‐plant CC had 0.29 ± 0.38 Mg biomass C ha−1, post‐harvest‐planted 0.22 ± 0.30, rye 0.33 ± 0.37, and the mix 0.16 ± 0.27. Low CC biomass (<1 Mg ha−1) production may explain the limited CC effects. Overall, pre‐harvest‐planted CCs and CC mixes had minimal effects on soil properties in this region after 4 yr.
Refinement of the kinetic model for guaiacol hydrodeoxygenation over platinum catalysts
Authors: Xiao Yang , Lagare Rexonni , Blanshan Lindsey , Martinez Enrico N. , Varma Arvind 
Published: January 2020

AbstractIn our prior work (Ind Eng Chem Res, 2015, 54, 10638‐10644), hydrodeoxygenation (HDO) kinetics of guaiacol, a well‐known model compound of bio‐oil, over Pt/AC (activated carbon) catalysts were investigated under integral operating conditions. It was found that the pseudo‐homogeneous plug‐flow model utilizing these kinetics describes the experimental observations well (with normalized RMS error = 7.6%). In the present work, under differential operating conditions instead, we refine the kinetic model for the same reaction network over the same catalyst. We show that among the five reaction steps in the network, the reaction order of one step differs from our prior work, while the orders remain unchanged for the other four steps. The activation energies of two steps differ from our prior values by 10–15 kJ/mol, and for the other three steps remain essentially consistent with our prior work. The kinetic parameters from the present work are used to predict fixed‐bed reactor performance under integral operating conditions as well. The comparison between experimental and predicted values for both the prior and new sets of data is excellent and even better than our prior model (with reduced normalized RMS error = 4.2%). The kinetic analysis additionally proposed that the direct and indirect pathways of phenol formation from guaiacol HDO depend on guaiacol conversion values. The present work demonstrates that kinetic expressions and parameters obtained from a gradientless differential reactor are more reliable and can be used to successfully predict integral reactor performance data.
Oppositely Charged Ti3C2Tx MXene Membranes with 2D Nanofluidic Channels for Osmotic Energy Harvesting
Authors: Ding Li , Xiao Dan , Lu Zong , Deng Junjie , Wei Yanying , Caro Jürgen , Wang Haihui 
Published: January 2020

AbstractMembrane‐based reverse electrodialysis (RED) is considered as the most promising technique to harvest osmotic energy. However, the traditional membranes are limited by high internal resistance and low efficiency, resulting in undesirable power densities. Herein, we report the combination of oppositely charged Ti3C2Tx MXene membranes (MXMs) with confined 2D nanofluidic channels as high‐performance osmotic power generators. The negatively or positively charged 2D MXene nanochannels exhibit typical surface‐charge‐governed ion transport and show excellent cation or anion selectivity. By mixing the artificial sea water (0.5 m NaCl) and river water (0.01 m NaCl), we obtain a maximum power density of ca. 4.6 Wm−2, higher than most of the state‐of‐the‐art membrane‐based osmotic power generators, and very close to the commercialization benchmark (5 Wm−2). Through connecting ten tandem MXM‐RED stacks, the output voltage can reach up 1.66 V, which can directly power the electronic devices.
NiH‐Catalyzed Migratory Defluorinative Olefin Cross‐Coupling: Trifluoromethyl‐Substituted Alkenes as Acceptor Olefins to Form gem‐Difluoroalkenes
Authors: Chen Fenglin , Xu Xianfeng , He Yuli , Huang Genping , Zhu Shaolin 
Published: January 2020

AbstractWe report a NiH‐catalyzed migratory defluorinative coupling between two electronically differentiated olefins. A broad range of unactivated donor olefins can be joined directly to acceptor olefins containing an electron‐deficient trifluoromethyl substituent in both intra‐ and intermolecular fashion to form gem‐difluoroalkenes. This migratory coupling shows both site‐ and chemoselectivity under mild conditions, with the formation of a tertiary or quaternary carbon center.
Polyhydrazide‐Based Organic Nanotubes as Efficient and Selective Artificial Iodide Channels
Authors: Roy Arundhati , Joshi Himanshu , Ye Ruijuan , Shen Jie , Chen Feng , Aksimentiev Aleksei , Zeng Huaqiang 
Published: January 2020

AbstractReported herein is a series of pore‐containing polymeric nanotubes based on a hydrogen‐bonded hydrazide backbone. Nanotubes of suitable lengths, possessing a hollow cavity of about a 6.5 Å diameter, mediate highly efficient transport of diverse types of anions, rather than cations, across lipid membranes. The reported polymer channel, having an average molecular weight of 18.2 kDa and 3.6 nm in helical height, exhibits the highest anion‐transport activities for iodide (EC50=0.042 μm or 0.028 mol % relative to lipid), whcih is transported 10 times more efficiently than chlorides (EC50=0.47 μm). Notably, even in cholesterol‐rich environment, iodide transport activity remains high with an EC50 of 0.37 μm. Molecular dynamics simulation studies confirm that the channel is highly selective for anions and that such anion selectivity arises from a positive electrostatic potential of the central lumen rendered by the interior‐pointing methyl groups.
Oxidative Addition of Alkenyl and Alkynyl Iodides to a AuI Complex
Authors: Cadge Jamie A. , Sparkes Hazel A. , Bower John F. , Russell Christopher A. 
Published: January 2020

AbstractThe first isolated examples of intermolecular oxidative addition of alkenyl and alkynyl iodides to AuI are reported. Using a 5,5′‐difluoro‐2,2′‐bipyridyl ligated complex, oxidative addition of geometrically defined alkenyl iodides occurs readily, reversibly and stereospecifically to give alkenyl‐AuIII complexes. Conversely, reversible alkynyl iodide oxidative addition generates bimetallic complexes containing both AuIII and AuI centers. Stoichiometric studies show that both new initiation modes can form the basis for the development of C−C bond forming cross‐couplings.
Spontaneous Oleofoams from Water‐in‐Oil Emulsions
Authors: Grizopoulou Sofia , Karagiorgou Maria , Karageorgiou Vassilis , Shao Ping , Petridis Dimitrios , Ritzoulis Christos 
Published: January 2020

AbstractSpontaneously foaming oil systems have been formulated from water‐in‐oil emulsions by the controlled release and entrapment of gas in emulsified water droplets contained within the oil. The cascade of events leading to their formation is as follows: Two Span 60‐emulsified populations of water droplets, one containing Na2CO3, the other 10% HCl and caseinate, were mixed in miglyol oil; the controlled coalescence of Na2CO3 droplets with the HCl ones served as a microreactor for the pH reduction and the subsequent release of CO2 from Na2CO3; these gas microbubbles were arrested by sodium caseinate, stabilizing a microfoam within the water droplets; these droplets expanded under the rising gas pressure, spontaneously transforming the surrounding oil into a foamy oleogel containing water droplets.
Visco‐elasto‐plastic constitutive model of adhesives under uniaxial compression in a range of strain rates
Authors: Wang Zhiyong , Li Peifeng 
Published: January 2020

ABSTRACTDetermining the constitutive model of adhesives enables the prediction of the mechanical response of hybrid structures in which the adhesive is used. In this study, the stress–strain behavior of a two‐component structural adhesive was first measured in uniaxial compression experiments at the strain rates ranging from 0.001 to 2600 s−1 for developing a constitutive model. It was found that the compressive response, including elastic modulus, yield strength, and plastic flow stress, is substantially influenced by the strain rate. In plastic deformation, the strain rate sensitivity is not constant but varies with the rate; moreover, strain softening and hardening dominate the plastic deformation at low and high strains, respectively. A visco‐elasto‐plastic constitutive model was then proposed for the adhesive, integrating the strain rate sensitivity that was quantified by empirical equations. The model which was validated can reliably represent the strain rate dependent compressive behavior of the adhesive. © 2020 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48962.
A study of rheological limitations in rotary jet spinning of polymer nanofibers through modeling and experimentation
Authors: Rogalski James J. , Botto Lorenzo , Bastiaansen Cees W. M. , Peijs Ton 
Published: January 2020

ABSTRACTThe recently popularized method of rotary jet spinning (RJS) or centrifugal spinning is investigated to evaluate the rheological limitations of polymer solutions and melts to optimal spinnability. The influence of Newtonian or non‐Newtonian behavior of the polymer on spinnability is discussed. We observe that highly viscous polymers tend to block the die channels within a rotary jet spinneret and therefore suggest the use of relatively low Newtonian viscosities of between 1 and 10 Pa s for optimal fiber production. Computational fluid dynamics simulations are used in conjunction with experimental data to establish important processing parameters, such as typical shear rates in the device and optimal polymer melt or solution viscosities. A theoretical model for RJS is compared to measured fiber diameters. The comparison shows that although fiber diameters can be estimated very roughly in the case of polymer solutions, the prediction of fiber diameter in the case of polymer melts require further modeling work. © 2020 Wiley Periodicals, Inc. J. Appl. Polym. Sci.2020,137, 48963.
Evaluation of polyphosphoric acid on the performance of polymer modified asphalt binders
Authors: Liu Shengjie , Zhou Shengbo , Peng Aihong 
Published: January 2020

AbstractThe aim of this research is to evaluate the effect of polyphosphoric acid (PPA) on the mechanical performance of styrene–butadiene–styrene (SBS) and styrene–butadiene–rubber (SBR) modified asphalt. Conventional properties, multiple stress creep recovery (MSCR), bending beam rheometer (BBR), and linear amplitude sweep (LAS) tests were conducted to evaluate the performance characteristics of asphalt at different PPA inclusions. Gel‐permeation chromatography (GPC), saturates, aromatics, resins, and asphaltenes (SARA), and Fourier transform infrared (FTIR) were carried to reveal the molecular weight, component and infrared spectra of asphalt. Results showed that PPA hardened the asphalt, improved the rutting and fatigue performances of polymer modified asphalt (PMA) binder, but weakened the anti‐cracking performances. Besides, storage stability had a significant improvement as the addition of PPA. The addition of PPA brought more macromolecules into asphalt and led to more high‐average molecular weight compounds. Furthermore, PPA changed four component ratios of asphalt. Both PMA with or without PPA have similar absorption peaks. This may be due to absorption peak of PMA covered the changes in PPA modification process as the low content of PPA. 0.8% dosage of PPA may be considered optimum for composite modified binder combining the above experimental results for this binder source.
Novel cancer therapies for advanced cutaneous melanoma: The added value of radiomics in the decision making process–A systematic review
Authors: Guerrisi Antonino , Loi Emiliano , Ungania Sara , Russillo Michelangelo , Bruzzaniti Vicente , Elia Fulvia , Desiderio Flora , Marconi Raffaella , Solivetti Francesco Maria , Strigari Lidia 
Published: January 2020

AbstractAdvanced malignant melanoma represents a public health matter due to its rising incidence and aggressiveness. Novel therapies such as immunotherapy are showing promising results with improved progression free and overall survival in melanoma patients. However, novel targeted and immunotherapies could generate atypical patterns of response which are nowadays a big challenge since imaging criteria (ie Recist 1.1) have not been proven to be always reliable to assess response. Radiomics and in particular texture analysis (TA) represent new quantitative methodologies which could reduce the impact of these limitations providing most robust data in support of clinical decision process. The aim of this paper was to review the state of the art of radiomics/TA when it is applied to the imaging of metastatic melanoma patients.
Mechanism of Diol Dehydration by a Promiscuous Radical‐SAM Enzyme Homologue of the Antiviral Enzyme Viperin (RSAD2)
Authors: Honarmand Ebrahimi Kourosh , Rowbotham Jack S. , McCullagh James , James William S. 
Published: January 2020

Abstract3′‐Deoxynucleotides are an important class of drugs because they interfere with the metabolism of nucleotides, and their incorporation into DNA or RNA terminates cell division and viral replication. These compounds are generally produced by multi‐step chemical synthesis, and an enzyme with the ability to catalyse the removal of the 3′‐deoxy group from different nucleotides has yet to be described. Here, using a combination of HPLC, HRMS and NMR spectroscopy, we demonstrate that a thermostable fungal radical S‐adenosylmethionine (SAM) enzyme, with similarity to the vertebrate antiviral enzyme viperin (RSAD2), can catalyse the transformation of CTP, UTP and 5‐bromo‐UTP to their 3′‐deoxy‐3′,4′‐didehydro (ddh) analogues. We show that, unlike the fungal enzyme, human viperin only catalyses the transformation of CTP to ddhCTP. Using electron paramagnetic resonance spectroscopy and molecular docking and dynamics simulations in combination with mutagenesis studies, we provide insight into the origin of the unprecedented substrate promiscuity of the enzyme and the mechanism of dehydration of a nucleotide. Our findings highlight the evolution of substrate specificity in a member of the radical‐SAM enzymes. We predict that our work will help in using a new class of the radical‐SAM enzymes for the biocatalytic synthesis of 3′‐deoxy nucleotide/nucleoside analogues.
Design and Computational Fluid Dynamics Analysis of a Three‐Phase Decanter Centrifuge for Oil‐Water‐Solid Separation
Authors: Zhu Mingjun , Hu Dapeng , Xu Yunfei , Zhao Shibo 
Published: January 2020

AbstractThe separation of oil, water, and sand has always been a significant problem in the treatment of oily sludge in oil field and petroleum refinery. The flow field and separation performance in a new three‐phase decanter centrifuge with vertical boards and annular liquid separation plate for oil‐water‐solids separation were investigated, using the computational fluid dynamics (CFD) software Fluent with Euler‐Euler three‐phase flow model, which provides a basis for the improvement and optimization of the centrifuge. After calculation, the velocity and pressure field were analyzed. The increase of solids content of the feed affected the separation efficiency regularly, and high or low treatment capacity also had a certain impact on the separation efficiency.
A Cornucopia of Iridium Nitrogen Compounds Produced from Laser‐Ablated Iridium Atoms and Dinitrogen
Authors: Stüker Tony , Beckers Helmut , Riedel Sebastian 
Published: January 2020

AbstractThe reaction of laser‐ablated iridium atoms with dinitrogen molecules and nitrogen atoms yield several neutral and ionic iridium dinitrogen complexes such as Ir(N2), Ir(N2)+, Ir(N2)2, Ir(N2)2−, IrNNIr, as well as the nitrido complexes IrN, Ir(N)2 and IrIrN. These reaction products were deposited in solid neon, argon and nitrogen matrices and characterized by their infrared spectra. Assignments of vibrational bands are supported by ab initio and first principle calculations as well as 14/15N isotope substitution experiments. The structural and electronic properties of the new dinitrogen and nitrido iridium complexes are discussed. While the formation of the elusive dinitrido complex Ir(N)2 was observed in a subsequent reaction of IrN with N atoms within the cryogenic solid matrices, the threefold coordinated iridium trinitride Ir(N)3 could not be observed so far.
Multilayered 2D Cesium‐Based Hybrid Perovskite with Strong Polarization Sensitivity: Dimensional Reduction of CsPbBr3
Authors: Liu Yi , Wang Jiaqi , Han Shiguo , Liu Xitao , Li Maofan , Xu Zhiyun , Guo Wuqian , Hong Maochun , Luo Junhua , Sun Zhihua 
Published: January 2020

Abstract3D perovskite CsPbBr3 has recently taken a blooming position for optoelectronic applications. However, due to the lack of natural anisotropy of optical attributes, it is a great challenge to fulfil polarization‐sensitive photodetection. Here, for the first time, we exploited dimensionality reduction of CsPbBr3 to tailor a 2D‐multilayered hybrid perovskite, (TRA)2CsPb2Br7 (1, in which TRA is (carboxy)cyclohexylmethylammonium), serving as a potential polarized‐light detecting candidate. Its unique quantum‐confined 2D structure results in intrinsic anisotropy of electrical conductivity, optical absorbance, and polarization‐dependent responses. Particularly, it exhibits remarkable dichroism with the photocurrent ratio (Ipc/Ipa) of ≈2.1, being much higher than that of the isotropic CsPbBr3 crystal and reported CH3NH3PbI3 nanowire (≈1.3), which reveals its great potentials for polarization‐sensitive photodetection. Further, crystal‐based detectors of 1 show fascinating responses to the polarized light, including high detectivity (>1010 Jones), fast responding time (≈300 μs), and sizeable on/off current ratios (>104). To our best knowledge, this is the first study on 2D Cs‐based hybrid perovskite exhibiting strong polarization‐sensitivity. The work highlights an effective pathway to explore new polarization sensitive candidates for hybrid perovskites and promotes their future electronic applications.
Use of Dithiasuccinoyl‐Caged Amines Enables COS/H2S Release Lacking Electrophilic Byproducts
Authors: Cerda Matthew M. , Mancuso Jenna L. , Mullen Emma J. , Hendon Christopher H. , Pluth Michael D. 
Published: January 2020

AbstractThe enzymatic conversion of carbonyl sulfide (COS) to hydrogen sulfide (H2S) by carbonic anhydrase has been used to develop self‐immolating thiocarbamates as COS‐based H2S donors to further elucidate the impact of reactive sulfur species in biology. The high modularity of this approach has provided a library of COS‐based H2S donors that can be activated by specific stimuli. A common limitation, however, is that many such donors result in the formation of an electrophilic quinone methide byproduct during donor activation. As a mild alternative, we demonstrate here that dithiasuccinoyl groups can function as COS/H2S donor motifs, and that these groups release two equivalents of COS/H2S and uncage an amine payload under physiologically relevant conditions. Additionally, we demonstrate that COS/H2S release from this donor motif can be altered by electronic modulation and alkyl substitution. These insights are further supported by DFT investigations, which reveal that aryl and alkyl thiocarbamates release COS with significantly different activation energies.
A Promising Fluorooxoborate Framework with Flexibile Capability for Diverse Cations to Enhance the Second Harmonic Generation
Authors: Cheng Shichao , Mutailipu Miriding , Yang Zhihua , Pan Shilie 
Published: January 2020

AbstractFluorooxoborates as potential deep ultraviolet (DUV) nonlinear optical (NLO) materials have exhibited diverse structures and NLO properties with metal cationic changes. Herein, the general mechanisms of metal cations on band gaps and optical properties in a series of typical fluorooxoborates have been clarified. It reveals that the framework of the emblematic 18‐membered ring oxyfluorides has the flexibility of being able to contain different cations spanning from alkali to d10 metals by investigating the stability of the artificial CdB5O7F3 structure. Besides, introducing d10 metal cations can enhance the second harmonic generation (3.1×KH2PO4 (KDP), d36=0.39 pm V−1) and also keep a DUV spectral transparency (Eg>6.2 eV). Thus, the d10‐containing fluorooxoborate exhibits a great potential to be a new DUV optical material for nonlinear light‐matter interactions.