bluuebunny/crossref_metadata_2025_split huggingface dataset:
Comunicación interpersonal en la web 2.0. Las relaciones de jóvenes con desconocidos
Authors: Cáceres Zapatero Mª Dolores , Brändle Gaspar , Ruiz San Román José A. 
Published: July 2013

Se presentan los resultados de una investigación a propósito de las nuevas formas que adopta la comunicación interpersonal en la web 2.0. El objetivo ha sido abordar las transformaciones de las comunicaciones interpersonales mediadas por ordenador, en concreto, verificar si la relación con desconocidos es una práctica frecuente; cuál es la percepción de quién es desconocido en la Red y qué confianza suscitan los desconocidos. Metodología: Se ha trabajado a partir de datos de una encuesta realizada en España a 1121 jóvenes (proyecto I+D+i Referencia CSO2008-01496). Conclusiones: Entre otras conclusiones, destaca que más de la mitad (53,1%) de los jóvenes considera el trato con desconocidos como forma normalizada de relación y que los que se relacionan con desconocidos tienen un perfil diferente de aquellos que no lo hacen: entienden las comunicaciones interpersonales como más sinceras, más controlables, más personales.
La política de comunicación proactiva de las instituciones públicas para combatir crisis
Authors: Rodríguez González María del Mar , Marauri Castillo Iñigo , Cantalapiedra Gonzalez Maria Jose 
Published: July 2013

La huelga protagonizada por los controladores aéreos en España durante los días 3, 4, 5 y 6 de diciembre de 2010 representa un caso paradigmático de comunicación de crisis. Objetivos y metodología: El objetivo de esta investigación es analizar las estrategias de comunicación públicas desarrolladas por el Ministerio de Fomento y el Gobierno. Por otro lado, se han estudiado las acciones en materia de comunicación de los promotores de la huelga, el sindicato de controladores aéreos. Se ha tomado como referencia la cobertura informativa de cinco de los principales diarios españoles y la repercusión del paro en las redes sociales. Conclusiones: Entre las principales conclusiones, se constata el éxito de la política de comunicación del Gobierno, basada en la previsión, la proactividad y la técnica del storytelling, es decir, la formulación de un relato con ‘buenos’, los ciudadanos y el Ejecutivo, y ‘malos’, los convocantes de la huelga, que cala en la opinión pública. También se comprueba el fracaso de la comunicación de los promotores del paro, condicionada por la improvisación, la actitud reactiva y la descoordinación.
An Interface-Capturing Regularization Method for Solving the Equations for Two-Fluid Mixtures
Authors: Du Jian , Guy Robert D. , Fogelson Aaron L. , Wright Grady B. , Keener James P. 
Published: July 2013

AbstractMany problems in biology involve gels which are mixtures composed of a polymer network permeated by a fluid solvent (water). The two-fluid model is a widely used approach to described gel mechanics, in which both network and solvent coexist at each point of space and their relative abundance is described by their volume fractions. Each phase is modeled as a continuum with its own velocity and constitutive law. In some biological applications, free boundaries separate regions of gel and regions of pure solvent, resulting in a degenerate network momentum equation where the network volume fraction vanishes. To overcome this difficulty, we develop a regularization method to solve the two-phase gel equations when the volume fraction of one phase goes to zero in part of the computational domain. A small and constant network volume fraction is temporarily added throughout the domain in setting up the discrete linear equations and the same set of equation is solved everywhere. These equations are very poorly conditioned for small values of the regularization parameter, but the multigrid-preconditioned GMRES method we use to solve them is efficient and produces an accurate solution of these equations for the full range of relevant regularization parameter values.
A Gas Kinetic Scheme for the Simulation of Compressible Multicomponent Flows
Authors: Pan Liang , Zhao Guiping , Tian Baolin , Wang Shuanghu 
Published: July 2013

AbstractIn this paper, a gas kinetic scheme for the compressible multicomponent flows is presented by making use of two-species GK model in [A. D. Kotelnikov and D. C. Montgomery, A Kinetic Method for Computing Inhomogeneous Fluid Behavior, J. Comput. Phys. 134 (1997) 364-388]. Different from the conventional BGK model, the collisions between different species are taken into consideration. Based on the Chapman-Enskog expansion, the corresponding macroscopic equations are derived from this two-species model. Because of the relaxation terms in the governing equations, the method of operator splitting is applied. In the hyperbolic part, the integral solutions of the BGK equations are used to construct the numerical fluxes at the cell interface in the framework of finite volume method. Numerical tests are presented in this paper to validate the current approach for the compressible multicomponent flows. The theoretical analysis on the spurious oscillations at the interface is also presented.
Arrhythmogenic right ventricular cardiomyopathy/Dysplasia (ARVC/D)
Authors: Iyer V. Ramesh , Chin Alvin J. 
Published: July 2013

AbstractArrhythmogenic right ventricular cardiomyopathy/dysplasia (ARVC/D) is a progressive genetic cardiomyopathy characterized by progressive fatty and fibrous replacement of ventricular myocardium. The clinical presentation is marked by ventricular arrhythmias, some fatal. The disease has evolved from a primary electrical/electrophysiological disorder (in the 1980s–1990s) to a diagnostic imaging conundrum (in the 2000s) to the current day understanding of a genetic cardiomyopathy caused by defects in cell–cell adhesion proteins or intracellular signaling components. The pathogenesis, clinical presentation, and the genetics of the disease are discussed in this review. © 2013 Wiley Periodicals, Inc.
The AT2 Domain of KirCI Loads Malonyl Extender Units to the ACPs of the Kirromycin PKS
Authors: Musiol Ewa Maria , Greule Anja , Härtner Thomas , Kulik Andreas , Wohlleben Wolfgang , Weber Tilmann 
Published: July 2013

AbstractThe antibiotic kirromycin is assembled by a hybrid modular polyketide synthases (PKSs)/nonribosomal peptide synthetases (NRPSs). Five of six PKSs of this complex assembly line do not have acyltransferase (AT) and have to recruit this activity from discrete AT enzymes. Here, we show that KirCI is a discrete AT which is involved in kirromycin production and displays a rarely found three‐domain architecture (AT1‐AT2‐ER). We demonstrate that the second AT domain, KirCI‐AT2, but not KirCI‐AT1, is the malonyl‐CoA‐specific AT which utilizes this precursor for loading the acyl carrier proteins (ACPs) of the trans‐AT PKS in vitro. In the kirromycin biosynthetic pathway, ACP5 is exclusively loaded with ethylmalonate by the enzyme KirCII and is not recognized as a substrate by KirCI. Interestingly, the excised KirCI‐AT2 can also transfer malonate to ACP5 and thus has a relaxed ACP‐specificity compared to the entire KirCI protein. The ability of KirCI‐AT2 to load different ACPs provides opportunities for AT engineering as a potential strategy for polyketide diversification.
Improving Binding Affinity and Stability of Peptide Ligands by Substituting Glycines with D‐Amino Acids
Authors: Chen Shiyu , Gfeller David , Buth Sergey A. , Michielin Olivier , Leiman Petr G. , Heinis Christian 
Published: July 2013

AbstractImproving the binding affinity and/or stability of peptide ligands often requires testing of large numbers of variants to identify beneficial mutations. Herein we propose a type of mutation that promises a high success rate. In a bicyclic peptide inhibitor of the cancer‐related protease urokinase‐type plasminogen activator (uPA), we observed a glycine residue that has a positive ϕ dihedral angle when bound to the target. We hypothesized that replacing it with a D‐amino acid, which favors positive ϕ angles, could enhance the binding affinity and/or proteolytic resistance. Mutation of this specific glycine to D‐serine in the bicyclic peptide indeed improved inhibitory activity (1.75‐fold) and stability (fourfold). X‐ray‐structure analysis of the inhibitors in complex with uPA showed that the peptide backbone conformation was conserved. Analysis of known cyclic peptide ligands showed that glycine is one of the most frequent amino acids, and that glycines with positive ϕ angles are found in many protein‐bound peptides. These results suggest that the glycine‐to‐D‐amino acid mutagenesis strategy could be broadly applied.
Improving Physical Absorption of Carbon Dioxide by Ionic Liquid Dispersion
Authors: Liu H. , Tian H. , Yao H. , Yu D. , Zhao W. , Bai X. 
Published: July 2013

AbstractAn ionic liquid (IL), 1‐butylimidazole hexafluoride phosphate [bmim]PF4, was dispersed in surfactant solution to form an IL‐in‐water emulsion. Physical absorption of CO2 was carried out in this emulsion system. Absorption rates of CO2 under different operating conditions were obtained by experimental measurements. CO2 concentrations in the bulk of absorbent and the local volumetric mass transfer coefficients of the liquid phase were calculated by model calculation. Experimental results indicate that the dispersed IL droplets in aqueous solution can significantly enhance CO2 mass transfer at the gas‐liquid interface. This phenomenon can be ascribed to the increase of mass transfer driving force and local volumetric mass transfer coefficient. The shuttle effect and hydrodynamic effect proved to play important roles for CO2 absorption improved by dispersed IL.
Aqueous Oxidation of Sulfonamide Antibiotics: Aromatic Nucleophilic Substitution of an Aniline Radical Cation
Authors: Tentscher Peter R. , Eustis Soren N. , McNeill Kristopher , Arey J. Samuel 
Published: July 2013

AbstractSulfonamide antibiotics are an important class of organic micropollutants in the aquatic environment. For several, sulfur dioxide extrusion products have been previously reported upon photochemical or dark oxidation. Using quantum chemical modeling calculations and transient absorption spectroscopy, it is shown that single‐electron oxidation from sulfadiazine produces the corresponding aniline radical cation. Density functional theory calculations indicate that this intermediate can exist in four protonation states. One species exhibits a low barrier for an intramolecular nucleophilic attack at the para position of the oxidized aniline ring, in which a pyrimidine nitrogen acts as a nucleophile. This attack can lead to a rearranged structure, which exhibits the same connectivity as the SO2‐extruded oxidation product that was previously observed in the aquatic environment and characterized by NMR spectroscopy. We report a detailed reaction mechanism for this intramolecular aromatic nucleophilic substitution, and we discuss the possibility of this reaction pathway for other sulfonamide drugs.
Electrochemical‐Reduction‐Assisted Assembly of a Polyoxometalate/Graphene Nanocomposite and Its Enhanced Lithium‐Storage Performance
Authors: Wang Shan , Li Haolong , Li Shuang , Liu Fang , Wu Dongqing , Feng Xinliang , Wu Lixin 
Published: July 2013

AbstractHerein, we present an electrochemically assisted method for the reduction of graphene oxide (GO) and the assembly of polyoxometalate clusters on the reduced GO (rGO) nanosheets for the preparation of nanocomposites. In this method, the Keggin‐type H4SiW12O40 (SiW12) is used as an electrocatalyst. During the reduction process, SiW12 transfers the electrons from the electrode to GO, leading to a deep reduction of GO in which the content of oxygen‐containing groups is decreased to around 5 %. Meanwhile, the strong adsorption effect between the SiW12 clusters and rGO nanosheets induces the spontaneous assembly of SiW12 on rGO in a uniformly dispersed state, forming a porous, powder‐type nanocomposite. More importantly, the nanocomposite shows an enhanced capacity of 275 mAh g−1 as a cathode active material for lithium storage, which is 1.7 times that of the pure SiW12. This enhancement is attributed to the synergistic effect of the conductive rGO support and the well‐dispersed state of the SiW12 clusters, which facilitate the electron transfer and lithium‐ion diffusion, respectively. Considering the facile, mild, and environmentally benign features of this method, it is reasonable as a general route for the incorporation of more types of functional polyoxometalates onto graphene matrices; this may allow the creation of nanocomposites for versatile applications, for example, in the fields of catalysis, electronics, and energy storage.
ChemInform Abstract: Ba2Cd(B3O6)2: A Congruent‐Melting Compound with Isolated B3O6 Units.
Authors: Zhou Zhongxiang , et al. et al. 
Published: July 2013

AbstractPowders of the title compound are prepared by solid state reaction of stoichiometric mixtures of Ba(NO3)2, CdO, and H3BO3 (810 °C, 48 h).
ChemInform Abstract: Ba2YFeO5.5: A Ferromagnetic Pyroelectric Phase Prepared by Topochemical Oxidation.
Authors: Luo Kun , Johnson Roger D. , Tran Thao T. , Halasyamani P. Shiv , Radaelli Paolo G. , Hayward Michael A. 
Published: July 2013

AbstractFe4+ containing Ba2YFeO5.5 is obtained by heating the cation‐ordered perovskite phase Ba2YFeO5 under 80 atm O2 (410 °C, 1 d).
ChemInform Abstract: Practical Enantioselective Hydrogenation of α‐Aryl‐ and α‐Carboxyamidoethylenes by Rhodium(I)‐{1,2‐Bis[(o‐tert‐butoxyphenyl)(phenyl)phosphino]ethane}.
Authors: Mohar Barbara , Stephan Michel 
Published: July 2013

AbstractThe title catalyst system displays high efficiency in the hydrogenation of α‐amidostyrenes (I) and α‐amidoacrylates (V).
ChemInform Abstract: Enantioselective Synthesis of 3,4‐Dihydropyran Derivatives via a Michael Addition Reaction Catalyzed by Chiral Pybox—diph—Zn(II) Complex.
Authors: Ray Sumit K. , Rout Subhrajit , Singh Vinod K. 
Published: July 2013

AbstractResulting Michael addition products are all found to exist in rapid equilibrium with their diastereomeric hemiketal form, formed by two carbonyl groups in 1,5‐position.
ChemInform Abstract: Evaluation of Cyclopentyl Methyl Ether (CPME) as a Solvent for Radical Reactions.
Authors: Kobayashi Shoji , Kuroda Hiroyuki , Ohtsuka Yuta , Kashihara Takashi , Masuyama Araki , Watanabe Kiyoshi 
Published: July 2013

AbstractCPME is demonstrated to be an effective solvent for a variety of radical addition and reduction reactions.
ChemInform Abstract: TMPZnOPiv·LiCl: A New Base for the Preparation of Air‐Stable Solid Zinc Pivalates of Sensitive Aromatics and Heteroaromatics.
Authors: Stathakis Christos I. , Manolikakes Sophia M. , Knochel Paul 
Published: July 2013

AbstractHindered zinc amide (I) provides a fast access to zinc pivalates of a wide range of aromatic and heteroaromatic substrates bearing sensitive functionalities like aldehyde or nitro groups.
ChemInform Abstract: Broadening the Catalyst and Reaction Scope of Regio‐ and Chemoselective C—H Oxygenation: A Convenient and Scalable Approach to 2‐Acylphenols by Intriguing Rh(II) and Ru(II) Catalysis.
Authors: Shan Gang , Han Xuesong , Lin Yun , Yu Shanyou , Rao Yu 
Published: July 2013

AbstractThe novel method demonstrates excellent ortho‐selectivity and good functional group tolerance.
ChemInform Abstract: Unveiling the Reactivity of Propargylic Hydroperoxides under Gold Catalysis.
Authors: Alcaide Benito , Almendros Pedro , Quiros M. Teresa , Lopez Ramon , Menendez Maria I. , Sochacka‐Cwikla Aleksandra 
Published: July 2013

AbstractThis gold‐catalyzed reaction of primary and secondary propargylic hydroperoxides with a variety of O‐ and C‐nucleophiles furnishes β‐functionalized ketones.
ChemInform Abstract: Cu(I)‐Catalyzed Domino Reaction of 3‐Cyclopropylideneprop‐2‐en‐1‐ones.
Authors: Miao Maozhong , Cao Jian , Zhang Jingjing , Huang Xian , Wu Luling 
Published: July 2013

AbstractAn interesting new route to benzofuranone derivatives with one highly strained three‐membered ring and one four‐membered ring is reported.
ChemInform Abstract: Regio‐ and Enantioselective Synthesis of Pyrrolidines Bearing a Quaternary Center by Palladium‐Catalyzed Asymmetric [3 + 2] Cycloaddition of Trimethylenemethanes.
Authors: Trost Barry M. , Lam Tom M. , Herbage Melissa A. 
Published: July 2013

AbstractIn reactions of electron‐rich imines LGA proved to be very efficient whereas LGB gives better results with electron‐deficient imines.
ChemInform Abstract: Rhodium‐ and Platinum‐Catalyzed [4 + 3] Cycloaddition with Concomitant Indole Annulation: Synthesis of Cyclohepta[b]indoles.
Authors: Shu Dongxu , Song Wangze , Li Xiaoxun , Tang Weiping 
Published: July 2013

AbstractThe procedure renders possible an access to various highly functionalized important structural motifs.
ChemInform Abstract: Highly Enantioselective Friedel—Crafts Alkylation/N‐Hemiacetalization Cascade Reaction with Indoles.
Authors: Cheng Hong‐Gang , Lu Liang‐Qiu , Wang Tao , Yang Qing‐Qing , Liu Xiao‐Peng , Li Yang , Deng Qiao‐Hui , Chen Jia‐Rong , Xiao Wen‐Jing 
Published: July 2013

AbstractThe method allows the preparation of a broad spectrum of diversely functionalized polycyclic indole skeletons with generally high enantioselectivity.
ChemInform Abstract: Unexpected Formation of N‐(1‐(2‐Aryl‐hydrazono)isoindolin‐2‐yl)benzamides and Their Conversion into 1,2‐(Bis‐1,3,4‐oxadiazol‐2‐yl)benzenes.
Authors: Paraschivescu Codruta C. , Matache Mihaela , Dobrota Cristian , Nicolescu Alina , Maxim Catalin , Deleanu Calin , Farcasanu Ileana C. , Hadade Niculina D. 
Published: July 2013

AbstractIsoindolinyl benzamides (III) are obtained as major products along with trace amounts of the predictable 1,2‐bis‐aroylhydrazones.
ChemInform Abstract: Eco‐Efficient, Regioselective and Rapid Access to 4,5‐Disubstituted 1,2,3‐Thiadiazoles via [3 + 2] Cycloaddition of α‐Enolicdithioesters with Tosyl Azide under Solvent‐Free Conditions.
Authors: Singh Maya Shankar , Nagaraju Anugula , Verma Girijesh Kumar , Shukla Gaurav , Verma Rajiv Kumar , Srivastava Abhijeet , Raghuvanshi Keshav 
Published: July 2013

AbstractThe title reaction is assumed to proceed via azide transfer from tosyl azide to dithio esters (I) followed by Wolff‐type heterocyclization.
ChemInform Abstract: Cascade Syntheses Routes to the Centrocountins.
Authors: Eschenbrenner‐Lux Vincent , Dueckert Heiko , Khedkar Vivek , Bruss Hanna , Waldmann Herbert , Kumar Kamal 
Published: July 2013

AbstractCascade synthesis routes to tetracyclic indoloquinolines using easily accessible substrates are presented.
ChemInform Abstract: Regioselective Synthesis of Phenoxathiin Derivatives under Transition‐Metal‐Free Conditions.
Authors: Hu Fangdong , Zhao Xin , Li Yanqiu , Feng Lei , Ma Chen 
Published: July 2013

AbstractBase‐promoted condensation of 1,2‐dihaloarenes or 1‐halo‐2‐nitroarenes with 2‐sulfanylphenol (II) offers a simple regioselective synthesis of various phenoxathiin structures and aza‐analogues such as (XIII) and (XV).
ChemInform Abstract: Selective Access to Trisubstituted Macrocyclic E‐ and Z‐Alkenes from the Ring‐Closing Metathesis of Vinylsiloxanes.
Authors: Wang Yikai , Jimenez Miguel , Sheehan Patrick , Zhong Cheng , Hung Alvin W. , Tam Chun Pong , Young Damian W. 
Published: July 2013

AbstractRetention or inversion of alkene geometry during bromination depend on both ring size and steric relations in the substrate.
ChemInform Abstract: Use of Rhodium Nanoparticles in Hydrogenation and Hydroformylation Reactions
Authors: Guerrero Miguel , Chau Nguyet T. Than , Noel Sebastien , Denicourt‐Nowicki Audrey , Hapiot Frederic , Roucoux Alain , Monflier Eric , Philippot Karine 
Published: July 2013

AbstractReview: 158 refs.
Biogas Conditioning Using Hollow Fiber Membrane Contactors
Authors: Vogler Steffen , Braasch Axel , Buse Gerhard , Hempel Sören , Schneider Jürgen , Ulbricht Martin 
Published: July 2013

AbstractBiogas is a popular source of renewable energy. However, production and conversion of biogas at the same location can result in energy losses up to 60 %. This energy loss can be reduced by upgrading the biogas to biomethane for injection into an existing gas delivery network and other uses. In order to upgrade the raw biogas produced from agriculture and industrial plants unwanted and harmful gases like CO2 and H2S need to be removed. An innovative process for biogas conditioning using hollow fiber membrane contactors is presented. In comparison to membrane gas separation no elevated pressure is needed.
A clustering based coscheduling strategy for efficient scientific workflow execution in cloud computing
Authors: Deng Kefeng , Ren Kaijun , Song Junqiang , Yuan Dong , Xiang Yang , Chen Jinjun 
Published: July 2013

SUMMARYDue to its advantages of cost‐effectiveness, on‐demand provisioning and easy for sharing, cloud computing has grown in popularity with the research community for deploying scientific applications such as workflows. Although such interests continue growing and scientific workflows are widely deployed in collaborative cloud environments that consist of a number of data centers, there is an urgent need for exploiting strategies which can place application datasets across globally distributed data centers and schedule tasks according to the data layout to reduce both latency and makespan for workflow execution. In this paper, by utilizing dependencies among datasets and tasks, we propose an efficient data and task coscheduling strategy that can place input datasets in a load balance way and meanwhile, group the mostly related datasets and tasks together. Moreover, data staging is used to overlap task execution with data transmission in order to shorten the start time of tasks. We build a simulation environment on Tianhe supercomputer for evaluating the proposed strategy and run simulations by random and realistic workflows. The results demonstrate that the proposed strategy can effectively improve scheduling performance while reducing the total volume of data transfer across data centers. Concurrency and Computation: Practice and Experience, 2013.© 2013 Wiley Periodicals, Inc.
Toward an economic and energy‐aware cloud cost model
Authors: Mach Werner , Schikuta Erich 
Published: July 2013

SUMMARYThis paper represents an economic cost model for cloud computing aiming at comprising all kinds of cost of a commercial environment. To extend conventional state‐of‐the‐art models considering only fixed cost, we developed a concise but comprehensive analytical model, which includes also variable cost allowing for the development and evaluation of business strategies for cloud environments. These strategies can be used for both cloud providers and cloud consumers. The major goal of our model is to comprise all important economic fundamentals and methods. Thus, this new model supports the decision‐making process to be applied with business cases and enables cloud consumers and cloud providers to define their own business strategies and to analyze the respective impact on their business. On the basis of this model, also, the energy efficiency of cloud systems can be evaluated according to chosen business models. Copyright © 2013 John Wiley & Sons, Ltd.
IRF5, IRF8, and IRF7 in human pDCs — the good, the bad, and the insignificant?
Authors: Pelka Karin , Latz Eicke 
Published: July 2013

Interferon (IFN) regulatory factors (IRFs) are transcription factors with versatile functions in the regulation of innate and adaptive immune responses. In the current issue of the European Journal of Immunology, Steinhagen et al. [Eur. J. Immunol. 2013. 43: 1896–1906] investigate the regulation of IFN‐β and IL‐6 induction in human plasmacytoid DCs stimulated with CpG DNA. Using RNA interference studies, the authors identify critical roles for IRF5 and IRF8 as positive and negative regulators, respectively. In contrast, knockdown of IRF7 had no significant effect on IFN‐β or IL‐6 gene induction. In this Commentary, these findings are discussed in the context of the published literature and recent data regarding IRF5 and IRF8 as susceptibility genes for autoimmunity.