bluuebunny/crossref_metadata_2025_split huggingface dataset:
Los influencers en el protocolo. Un caso de estudio
Authors: Muiños Morales Pilar 
Published: February 2018

La figura del prescriptor ha sido siempre un recurso utilizado en la publicidad, pero con la aparición de las redes sociales, esa figura se ha ampliado y se implantado en la sociedad el concepto de influencer, como una persona o personalidad que tiene la habilidad de influir en un determinado público a través de sus valoraciones sobre alguna marca, productos, servicios o eventos. .Los blogs y espacios como las redes sociales, sobre todo Twitter, Instagram o Youtube han favorecido la aparición de un nuevo perfil de prescriptores, unos líderes de opinión a los que las marcas y las empresas recurren para multiplicar el alcance de sus acciones de comunicación. En este artículo se analiza qué son los influencers, cómo identificarlos gracias a medidores de influencia, cuáles de ellos son importantes en el protocolo y la organización de eventos y de qué forma influyen en ellos.___________________The figure of the prescriber has always been a resource used in advertising, but with the emergence of social networks, that figure has been expanded and the concept of influencer has appeared, as a person or personality who has the ability to influence in a certain public throughout his/her opinions on some brand, product, service or event.Blogs and social networks, especially Twitter, Instagram or Youtube have favoured the development of a new profile of prescribers, opinion leaders that brands and companies use to multiply the scope of their communication actions. This article examines what influencers are, how to identify them through online impact gauge, which are important in protocol and organization of events, and how they influence them.
Basal Settings Control Fast Ice Flow in the Recovery/Slessor/Bailey Region, East Antarctica
Authors: Diez Anja , Matsuoka Kenichi , Ferraccioli Fausto , Jordan Tom A. , Corr Hugh F. , Kohler Jack , Olesen Arne V. , Forsberg René 
Published: February 2018

AbstractThe region of Recovery Glacier, Slessor Glacier, and Bailey Ice Stream, East Antarctica, has remained poorly explored, despite representing the largest potential contributor to future global sea level rise on a centennial to millennial time scale. Here we use new airborne radar data to improve knowledge about the bed topography and investigate controls of fast ice flow. Recovery Glacier is underlain by an 800 km long trough. Its fast flow is controlled by subglacial water in its upstream and topography in its downstream region. Fast flow of Slessor Glacier is controlled by the presence of subglacial water on a rough crystalline bed. Past ice flow of adjacent Recovery and Slessor Glaciers was likely connected via the newly discovered Recovery‐Slessor Gate. Changes in direction and speed of past fast flow likely occurred for upstream parts of Recovery Glacier and between Slessor Glacier and Bailey Ice Stream. Similar changes could also reoccur here in the future.
Cohesion‐Induced Stabilization in Stick‐Slip Dynamics of Weakly Wet, Sheared Granular Fault Gouge
Authors: Dorostkar Omid , Guyer Robert A. , Johnson Paul A. , Marone Chris , Carmeliet Jan 
Published: February 2018

AbstractWe use three‐dimensional discrete element calculations to study stick‐slip dynamics in a weakly wet granular layer designed to simulate fault gouge. The granular gouge is constituted by 8,000 spherical particles with a polydisperse size distribution. At very low liquid content, liquids impose cohesive and viscous forces on particles. Our simulations show that by increasing the liquid content, friction increases and granular layer shows higher recurrence time between slip events. We also observe that slip events exhibit larger friction drop and layer compaction in wet system compared to dry. We demonstrate that a small volume of liquid induces cohesive forces between wet particles that are responsible for an increase in coordination number leading to a more stable arrangement of particles. This stabilization is evidenced with 2 orders of magnitude lower particle kinetic energy in wet system during stick phase. Similar to previous experimental studies, we observe enhanced frictional strength for wet granular layers. In experiments, the physicochemical processes are believed to be the main reason for such behavior; we show, however, that at low confining stresses, the hydromechanical effects of induced cohesion are sufficient for observed behavior. Our simulations illuminate the role of particle interactions and demonstrate the conditions under which induced cohesion plays a significant role in fault zone processes, including slip initiation, weakening, and failure.
Contrasting Impact of Future CO2 Emission Scenarios on the Extent of CaCO3 Mineral Undersaturation in the Humboldt Current System
Authors: Franco A. C. , Gruber N. , Frölicher T. L. , Kropuenske Artman L. 
Published: February 2018

AbstractThe eastern boundary upwelling systems are among those regions that are most vulnerable to an ocean acidification‐induced transition toward undersaturated conditions with respect to mineral CaCO3, but no assessment exists yet for the Humboldt Current System. Here we use a high‐resolution (∼7.5 km) regional ocean model to investigate past and future changes in ocean pH and CaCO3 saturation state in this system. We find that within the next few decades, the nearshore waters off Peru are projected to become corrosive year round with regard to aragonite, the more soluble form of CaCO3. The volume of aragonite undersaturated water off Peru will continue to increase in the future irrespective of the amount of CO2 emitted to the atmosphere. In contrast, the development of the saturation state with regard to calcite, a less soluble form of carbonate, depends strongly on the scenario followed. By 2050, calcite undersaturation appears in the nearshore waters off Peru occasionally, but by 2090 in a high‐emission scenario (RCP8.5), ∼60% of the water in the euphotic zone will become permanently calcite undersaturated. Most of this calcite undersaturation off Peru can likely be avoided if a low emission scenario (RCP2.6) consistent with the Paris Agreement is followed. The progression of ocean acidification off Chile follows a similar pattern, except that the saturation states are overall higher. But also here, calcite undersaturated waters will become common in the subsurface waters under the RCP8.5 scenario by the end of this century, while this can be avoided under the RCP2.6 scenario.
Novel Blue Bipolar Thermally Activated Delayed Fluorescence Material as Host Emitter for High‐Efficiency Hybrid Warm‐White OLEDs with Stable High Color‐Rendering Index
Authors: Liang Jie , Li Chenglong , Zhuang Xuming , Ye Kaiqi , Liu Yu , Wang Yue 
Published: February 2018

AbstractA novel thermally activated delayed fluorescence (TADF) molecule, PHCz2BP, is synthesized and used to construct high performance organic light‐emitting diodes (OLEDs) in this work. PHCz2BP is not only the neat emitting layer for efficient sky‐blue OLED, with very high peak external quantum efficiency/power efficiency (EQE/PE) values of 4.0%/6.9 lm W−1, but also acts as a host to sensitize high‐luminance and high‐efficiency green, orange, and red electrophosphorescence with the universal high EQEs of >20%. More importantly, two hybrid white OLEDs based on the double‐layer emitting system of PHCz2BP:green phosphor/PHCz2BP:red phosphor are achieved. To the best of the knowledge, this is the first report for three‐color (blue–green–red) white devices that adopt a TADF blue host emitter and two phosphorescent dopants without any other additional host. Such simple emitting systems thus realized the best electroluminescent performance to date for the WOLEDs utilizing the hybrid TADF/phosphor strategy: forward‐viewing EQEs of 25.1/23.6% and PEs of 24.1/22.5 lm W−1 at the luminance of 1000 cd m−2 with the color rendering indexes of 85/87 and warm‐white Commission Internationale de L'Eclairage coordinates of (0.41, 0.46)/(0.42, 0.45), indicating its potential to be used as practical eye‐friendly solid‐state lighting in future.
Integrated Heterostructure of PDA/Bi‐AgIn5S8/TiO2 for Photoelectrochemical Hydrogen Production: Understanding the Synergistic Effect of Multilayer Structure
Authors: Guan Peng , Bai Hongye , Li Chunfa , Ge Yilin , Xu Dongbo , Chen Biyi , Xia Teng , Fan Weiqiang , Shi Weidong 
Published: February 2018

AbstractOvercoming one of most challenging limitations of bare TiO2 with large bandgap can be achieved by rational design and fabrication of heterostructures. Multicomponent sulfides with a nature of tunable band structure can be a good alternative to decorating TiO2, but there remains a major trade‐off between the high efficiency and the long‐term durability, so the stability issue must be addressed upon the use of sulfides. Here, an effective strategy is demonstrated with Bi‐doped AgIn5S8 (Bi‐AgIn5S8) decorated TiO2 photoanode, where twofold enhancement of the photocurrent is achieved. More importantly, it is the first time to integrate polydopamine passivation layer and AgIn5S8 for simultaneously enhancing the solar conversion efficiency and stability. The incident photon‐to‐current conversion efficiency value is tuned up to 45% (0.4 V vs Ag/AgCl), and the photocurrent density can keep for 90.8% after 5 h. Corresponding hydrogen evolution rate has increased to 8.6 µmol h−1, which is three times higher than that of bare TiO2.
Structural Coloration in Caloenas Nicobarica Pigeons and Refractive Index Modulated Sensing
Authors: Rashid Ijaz , Hassan Muhammad Umair , Khandwalla Abbas , Ameen Rayan Mohammed , Yetisen Ali Kemal , Dai Qing , Butt Haider 
Published: February 2018

AbstractThe Nicobar pigeon (Caloenas Nicobarica) belongs to the extinct dodo‐bird family and has been declared as an endangered species. Here, microscopic and spectroscopic measurements are carried out on the bird's feathers to study the structural coloration originating from the barbule nanostructures. A range of color shades is recorded with changing viewing and illumination angles at different locations of the feathers. A spectacular variation in colors is generated by photonic structures; red, green, and blue and their blends are observed. Hydrophobicity of the optical material is also investigated. A contact angle of ≈156° is observed demonstrating it to be superhydrophobic. Experimental observations of the optical properties are analyzed on these feathers for sensing made possible due to the material and structural properties at the interface between barbule's surface and solution. An optical response is observed with a redshift in optical spectra with increasing refractive index of the solution, which is correlated with concentration values. The structural coloration in Nicobar pigeon can be adopted for many practical applications such as color selective filters, nonreflecting coatings, and refractive index‐based sensing.
TTIP and agricultural trade: The case of tariff elimination and pesticide policy cooperation
Authors: Xiong Bo , Beghin John C. 
Published: February 2018

AbstractA possible Transatlantic Trade and Investment Partnership agreement will further integrate agricultural markets between the United States and the European Union. The elimination of tariffs and cooperation on sanitary and phytosanitary measures will promote cross‐Atlantic trade. We empirically estimate the impacts of tariffs and maximum residue limits on trade in plant products between the two partners. Furthermore, we simulate trade expansions under plausible negotiation outcomes. We find that a TTIP agreement promotes cross‐Atlantic trade in plant products, in both directions, by nearly 60% if tariffs are removed and MRLs are mutually recognized or harmonized to the Codex levels. [EconLit citations: Q17, F15]
A Chromium Hydroxide/MIL‐101(Cr) MOF Composite Catalyst and Its Use for the Selective Isomerization of Glucose to Fructose
Authors: Guo Qiang , Ren Limin , Kumar Prashant , Cybulskis Viktor J. , Mkhoyan K. Andre , Davis Mark E. , Tsapatsis Michael 
Published: February 2018

AbstractA metal–organic framework (MOF)‐based catalyst, chromium hydroxide/MIL‐101(Cr), was prepared by a one‐pot synthesis method. The combination of chromium hydroxide particles on and within Lewis acidic MIL‐101 accomplishes highly selective conversion of glucose to fructose in the presence of ethanol, matching the performance of optimized Sn‐containing Lewis acidic zeolites. Differently from zeolites, NMR spectroscopy studies with isotopically labeled molecules demonstrate that isomerization of glucose to fructose on this catalyst, proceeds predominantly via a proton transfer mechanism.
Tungsten doped mesoporous SBA‐16 as novel heterogeneous catalysts for oxidation of cyclopentene to glutaric acid
Authors: Jin Manman , Zhang Guodi , Guo Zhenmei , Lv Zhiguo 
Published: February 2018

Novel heterogeneous tungsten species in mesoporous silica SBA‐16 catalysts based on ship‐in‐a‐bottle methodology are originally reported for oxidizing cyclopentene (CPE) to glutaric acid (GAC) using hydrogen peroxide (H2O2). For all W‐SBA‐16 catalysts, isolated tungsten species and octahedrally coordinated tungsten oxide species are observed while WO3 crystallites are detected for the W‐SBA‐16 catalysts with Si/ W = 5, 10, and 20. The specific surface areas and the corresponding total pore volumes decrease significantly as increasing amounts of tungsten incorporated into the pores of SBA‐16. Using tungsten‐substituted mesoporous SBA‐16 heterogeneous catalysts, high yield of GAC (55%) is achieved with low tungsten loading (for Si/W = 30, ~13 wt%) for oxidation of CPE. The W‐SBA‐16 catalysts with Si/W = 30 can be reused five times without dramatic deactivation. In fact, low catalytic activity provided by bulk WO3 implies that the highly distributed tungsten species in SBA‐16 and the steric confinement effect of SBA‐16 are key elements for the outstanding catalytic performance.
Polyacrylamide copolymer/aminated carbon nanotube‐based aqueous nanofluids for application in high temperature and salinity
Authors: Lima Meiriane Cristina Faria Soares , Amparo Sthéfany Zaida Silva do , Siqueira Eder José , Miquita Douglas Rodrigues , Caliman Vinicius , Silva Glaura Goulart 
Published: February 2018

ABSTRACTPolymer aqueous nanofluids have numerous industrial applications due to their synergic properties as a polymer and nanoparticle in the same fluid. The main goal of this work was to prepare stable aqueous nanofluids with improved viscosity in high temperature and salinity conditions. Aminated carbon nanotube (OCNT‐TEPA) presented a CN photoemission peak at 285.5 eV in X‐ray photoelectron spectroscopy spectra, which is evidence of a grafting reaction. Fourier transform infrared spectra presented absorption bands attributed to amide and amine bonds. Elemental analyses showed 1.9 and 3.2 mass % N content increases for OCNT‐TEPA and OCNT‐TEPA‐AM, respectively. Samples aged at 70 °C in brine confirmed that the addition of OCNT‐TEPA increased the viscosity of nanofluids to 30% at day 90 compared to acrylamide–acrylic acid copolymer fluids. Nanotubes presented only 35% of the aminated functions compared to carbon black (Lima et al., Carbon 2016, 109, 209) , and their effects in the enhancement of viscosity and thermal and colloidal stability were 2× greater. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46382.
Simple and rapid system for two‐dimensional gel electrophoresis technique: A laboratory exercise for high school students
Authors: Maurye Praveen , Basu Arpita , Biswas Jayanta Kumar , Bandyopadhyay Tapas Kumar , Naskar Malay 
Published: February 2018

AbstractPolyacrylamide gel electrophoresis (PAGE) is the most classical technique favored worldwide for resolution of macromolecules in many biochemistry laboratories due to its incessant advanced developments and wide modifications. These ever‐growing advancements in the basic laboratory equipments lead to emergence of many expensive, complex, and tricky laboratory equipments. Practical courses of biochemistry at high school or undergraduate levels are often affected by these complications. Two dimensional gel electrophoresis technique (2D‐PAGE) used for resolving thousands of proteins in a gel is a combination of isoelectric focusing (first dimension gel electrophoresis technique) and sodium‐dodecylsulphate PAGE (second dimension gel electrophoresis technique or SDS‐PAGE). Two different laboratory equipments are needed to carry out effective 2D‐PAGE technique, which also invites extra burden to the school laboratory. Here, we describe a low cost, time saving and simple gel cassette for protein 2D‐PAGE technique that uses easily fabricated components and routine off‐the‐shelf materials. The performance of the apparatus was verified in a practical exercise by a group of high school students with positive outcomes. © 2018 by The International Union of Biochemistry and Molecular Biology, 46(3):237–244, 2018.
Directed C−H Bond Oxidation of Bridged Cycloalkanes Catalyzed by Palladium(II) Acetate
Authors: Larrosa Marta , Zonker Benjamin , Volkmann Jannis , Wech Felix , Logemann Christian , Hausmann Heike , Hrdina Radim 
Published: February 2018

AbstractWe have developed a synthesis of 1,2‐substituted adamantane carboxylic acids and further bridged cycloalkanes (cage compounds) by palladium acetate‐catalyzed C−H bond oxidation. Acetoxylation of cycloalkane framework was performed using picolylamide as a directing group. Modification of the substrate, ligand design and variation of reaction conditions enabled us to study the mechanism of acetoxylation of aliphatic compounds. Post‐functionalization reactions and cleavage of the directing group were developed. For the first time the synthesis and characterization of a β‐C3‐tri‐substituted adamantane derivatives was achieved.
Silylative Reductive Amination of α,β‐Unsaturated Aldehydes: A Convenient Synthetic Route to β‐Silylated Secondary Amines
Authors: Kim Eunae , Park Sehoon , Chang Sukbok 
Published: February 2018

AbstractDescribed here is a reductive amination/hydrosilylation cascade of α,β‐unsaturated aldehydes mediated by a Lewis acidic borane catalyst. The present reaction system provides an one‐pot synthetic route towards β‐silylated secondary amines that have not been accessible by other previous catalysis. Comparative 1H NMR studies on the silylative reduction of enimines revealed that steric bulkiness of primary amine reactants strongly affects both catalytic efficiency and regioselectivity. This strategy was applicable to a broad range of substrates and amenable to one‐pot gram‐scale synthesis. Moreover, a diastereoselective introduction of the β‐silyl group was also found to be feasible (d.r. up to 71:29).
Effect of KCNQ1 G229D mutation on cardiac pumping efficacy and reentrant dynamics in ventricles: Computational study
Authors: Yuniarti Ana Rahma , Setianto Febrian , Marcellinus Aroli , Hwang Han Jeong , Choi Seong Wook , Trayanova Natalia , Lim Ki Moo 
Published: February 2018

AbstractThere is growing interest in genetic arrhythmia since mutations in gene which encodes the ion channel underlie numerous arrhythmias. Hasegawa et al reported that G229D mutation in KCNQ1 underlies atrial fibrillation due to significant shortening of action potential duration (APD) in atrial cells. Here, we predicted whether KCNQ1 G229D mutation affects ventricular fibrillation generation, although it shortens APD slightly compared with the atrial cell. We analyzed the effects of G229D mutation on electrical and mechanical ventricle behaviors (not considered in previous studies). We compared action potential shapes under wild‐type and mutant conditions. Electrical wave propagations through ventricles were analyzed during sinus rhythm and reentrant conditions. IKs enhancement due to G229D mutation shortened the APD in the ventricular cells (6%, 0.3%, and 8% for endo, M, and epi‐cells, respectively). The shortened APD contributed to 7% shortening of QT intervals, 29% shortening of wavelengths, 20% decrease in intraventricular pressure, and increase in end‐systolic volume 17%, end‐diastolic volume 7%, and end‐diastolic pressure 11%, which further resulted in reduction in stroke volume as well as cardiac output (28%), ejection fraction 33% stroke work 44%, and ATP consumption 28%. In short, using computational model of the ventricle, we predicted that G229D mutation decreased cardiac pumping efficacy and increased the vulnerability of ventricular fibrillation.
Patient‐specific simulation of guidewire deformation during transcatheter aortic valve implantation
Authors: Vy Phuoc , Auffret Vincent , Castro Miguel , Badel Pierre , Rochette Michel , Haigron Pascal , Avril Stéphane 
Published: February 2018

AbstractTranscatheter aortic valve implantation is a recent mini‐invasive procedure to implant an aortic valve prosthesis. Prosthesis positioning in transcatheter aortic valve implantation appears as an important aspect for the success of the intervention. Accordingly, we developed a patient‐specific finite element framework to predict the insertion of the stiff guidewire, used to position the aortic valve. We simulated the guidewire insertion for 2 patients based on their pre‐operative CT scans. The model was designed to primarily predict the position and the angle of the guidewires in the aortic valve, and the results were successfully compared with intraoperative images.The present paper describes extensively the numerical model, which was solved by using the ANSYS software with an implicit resolution scheme, as well as the stabilization techniques which were used to overcome numerical instabilities. We performed sensitivity analysis on the properties of the guidewire (curvature angle, curvature radius, and stiffness) and the conditions of insertion (insertion force and orientation). We also explored the influence of the model parameters. The accuracy of the model was quantitatively evaluated as the distance and the angle difference between the simulated guidewires and the intraoperative ones.A good agreement was obtained between the model predictions and intraoperative views available for 2 patient cases. In conclusion, we showed that the shape of the guidewire in the aortic valve was mainly determined by the geometry of the patient's aorta and by the conditions of insertion (insertion force and orientation).
Solid‐State Route for the Synthesis of Scalable, Luminescent Silicon and Germanium Nanocrystals
Authors: Kirshenbaum Maxine J. , Boebinger Matthew G. , Katz Michael J. , McDowell Matthew T. , Dasog Mita 
Published: February 2018

AbstractGroup 14 nanocrystals (NCs) have gained significant attention in the last decade largely owing to their unique and tunable optoelectronic properties, allowing for diverse applications across a range of fields. Herein we report a gram‐scale method to prepare Si and Ge NCs from mesoporous metal oxides using a solid‐state metallothermic reduction method. Mesoporous SiO2 and GeO2 were prepared using a templated sol‐gel method. The influence of pore size of the metal oxide precursor and the nature of reducing metal on the formation of Si and Ge was investigated. The NCs were functionalized with dodecyl groups via microwave‐assisted hydrosilylation and hydrogermylation reactions, respectively. Si and Ge NCs were found to have tunable visible or near‐IR luminescence with high emission quantum yields.