bluuebunny/crossref_metadata_2025 huggingface dataset:
Searches for the new magnetic intermediate-mass stars on various stages of MS evolution
Authors: Semenko Evgeny A.
Published: August 2014

A limited list of new results of the searches for the new magnetic stars among late B and early A stars is in this work. Continual observations with spectroscopic devices of the 6m Russian telescope BTA led to successful detection of about 10 new magnetic stars that occupy different parts of evolutional tracks for the stars of 2–3 solar masses. Measurements of the longitudinal magnetic field show weak and medium strength magnetic field in all program stars.
The evolution of surface magnetic fields in young solar-type stars
Authors: Folsom C. P. , Petit P. , Bouvier J. , Donati J.-F. , Morin J.
Published: August 2014

The surface rotation rates of young solar-type stars decrease rapidly with age from the end of the pre-main sequence though the early main sequence. This suggests that there is also an important change in the dynamos operating in these stars, which should be observable in their surface magnetic fields. Here we present early results in a study aimed at observing the evolution of these magnetic fields through this critical time period. We are observing stars in open clusters and stellar associations to provide precise ages, and using Zeeman Doppler Imaging to characterize the complex magnetic fields. Presented here are results for six stars, three in the in the β Pic association (~10 Myr old) and three in the AB Dor association (~100 Myr old).
Coronal influence on dynamos
Authors: Warnecke Jörn , Brandenburg Axel
Published: August 2014

We report on turbulent dynamo simulations in a spherical wedge with an outer coronal layer. We apply a two-layer model where the lower layer represents the convection zone and the upper layer the solar corona. This setup is used to study the coronal influence on the dynamo action beneath the surface. Increasing the radial coronal extent gradually to three times the solar radius and changing the magnetic Reynolds number, we find that dynamo action benefits from the additional coronal extent in terms of higher magnetic energy in the saturated stage. The flux of magnetic helicity can play an important role in this context.
High-resolution spectropolarimetry of κ Cet: A proxy for the young Sun
Authors: do Nascimento J. D. , Petit P. , Castro M. , de Mello G. F. Porto , Jeffers S. V. , Marsden S. C. , Ribas I. , Guinan E. ,   the Bcool Collaboration
Published: August 2014

κ1 Cet (HD 20630, HIP 15457, d = 9.16 pc, V = 4.84) is a dwarf star approximately 30 light-years away in the equatorial constellation of Cetus. Among the solar proxies studied in the Sun in Time, κ1 Cet stands out as potentially having a mass very close to solar and a young age. On this study, we monitored the magnetic field and the chromospheric activity from the Ca II H & K lines of κ1 Cet. We used the technique of Least-Square-Deconvolution (LSD, Donati et al. 1997) by simultaneously extracting the information contained in all 8,000 photospheric lines of the echelogram (for a linelist matching an atmospheric model of spectral type K1). To reconstruct a reliable magnetic map and characterize the surface differential rotation of κ1 Cet we used 14 exposures spread over 2 months, in order to cover at least two rotational cycles (Prot ~9.2 days). The Least Square deconvolution (LSD) technique was applied to detect the Zeeman signature of the magnetic field in each of our 14 observations and to measure its longitudinal component. In order to reconstruct the magnetic field geometry of κ1 Cet, we applied the Zeeman Doppler Imaging (ZDI) inversion method. ZDI revealed a structure in the radial magnetic field consisting of a polar magnetic spot. On this study, we present the fisrt look results of a high-resolution spectropolarimetric campaign to characterize the activity and the magnetic fields of this young solar proxy.
The large scale magnetic field of the G0 dwarf HD 206860 (HN Peg)
Authors: Saikia Sudeshna Boro , Jeffers Sandra V. , Petit Pascal , Marsden Stephen , Morin Julien , Reiners Ansgar ,   the Bcool project
Published: August 2014

HD 206860 is a young planet (HN Peg b) hosting star of spectral type G0V and it has a potential debris disk around it. In this work we measure the longitudinal magnetic field of HD 206860 using spectropolarimetric data and we measure the chromospheric activity using Ca II H&K, H-alpha and Ca II infrared triplet lines.
What controls the large-scale magnetic fields of M dwarfs?
Authors: Gastine T. , Morin J. , Duarte L. , Reiners A. , Christensen U. , Wicht J.
Published: August 2014

Observations of active M dwarfs show a broad variety of large-scale magnetic fields encompassing dipole-dominated and multipolar geometries. We detail the analogy between some anelastic dynamo simulations and spectropolarimetric observations of 23 M stars. In numerical models, the relative contribution of inertia and Coriolis force –estimated by the so-called local Rossby number– is known to have a strong impact on the magnetic field geometry. We discuss the relevance of this parameter in setting the large-scale magnetic field of M dwarfs.
Meridional flow velocities for solar-like stars with known activity cycles
Authors: Baklanova Dilyara , Plachinda Sergei
Published: August 2014

The direct measurements of the meridional flow velocities on stars are impossible today. We suppose that the matter on a surface of solar-like stars with stable activity period passes the way equal to 2π R∗ during the stellar Hale cycle. We present here the dependence of meridional flow velocity on Rossby number, which is an effective parameter of the stellar magnetic dynamo.
Constraining Stellar Winds of Young Sun-like Stars
Authors: Johnstone Colin P. , Lüftinger Theresa , Güdel Manuel , Fichtinger Bibiana
Published: August 2014

As part of the project Pathways to Habitability (http://path.univie.ac.at/), we study the properties of the stellar winds of low-mass and Sun-like stars, and their influences on the atmospheres of potentially habitable planets. For this purpose, we combine mapping of stellar magnetic fields with magnetohydrodynamic wind models.
New observations of chemically peculiar stars with ESPaDOnS
Authors: Khalack V. , Yameogo B. , Thibeault C. , LeBlanc F.
Published: August 2014

We present the first results of the estimation of gravity and effective temperature for some poorly studied chemically peculiar stars that were recently observed with the spectropolarimeter ESPaDOnS at CFHT. We have analyzed the spectra of HD71030, HD95608 and HD116235 to determine their radial velocity, vsini and the average abundance of several chemical species. We have also analyzed our results to verify for possible vertical abundance stratification of iron and chromium in these stars.
The Dominion Astrophysical Observatory Magnetic Field Survey (DMFS)
Authors: Bohlender David A. , Monin Dmitry
Published: August 2014

In this paper we present a few results from the first three years of an ongoing survey of globally-ordered magnetic fields in relatively faint (down to V ≈ 9) upper main sequence peculiar stars that we are conducting on the Dominion Astrophysical Observatory (DAO) Plaskett telescope. The DMFS uses the inexpensive DAO polarimeter module, dimaPol, mounted at the Cassegrain focus of the 1.8 m telescope to detect new magnetic stars and determine rotation periods and longitudinal magnetic field curves using medium-resolution (R ≈ 10,000) circular spectropolarimetry of both the Hβ line and metal lines in an approximately 280 Å wide wavelength region centered on Hβ. By concentrating on the mid-B to A-type peculiar stars, the DMFS provides an extension to the ‘Magnetism in Massive Stars’ (MIMES) Large Program which concentrated on similar field detections in more massive stars.
Roadmap on the theoretical work of BinaMIcS
Authors: Mathis Stéphane , Neiner Coralie , Alecian Evelyne , Wade Gregg ,   the BinaMIcS collaboration
Published: August 2014

We review the different theoretical challenges concerning magnetism in interacting binary or multiple stars that will be studied in the BinaMIcS (Binarity and Magnetic Interactions in various classes of Stars) project during the corresponding spectropolarimetric Large Programs at CFHT and TBL. We describe how completely new and innovative topics will be studied with BinaMIcS such as the complex interactions between tidal flows and stellar magnetic fields, the MHD star-star interactions, and the role of stellar magnetism in stellar formation and vice versa. This will strongly modify our vision of the evolution of interacting binary and multiple stars.
The dichotomy between strong and ultra-weak magnetic fields among intermediate-mass stars
Authors: Lignières François , Petit Pascal , Aurière Michel , Wade Gregg A. , Böhm Torsten
Published: August 2014

Until recently, the detection of magnetic fields at the surface of intermediate-mass main-sequence stars has been limited to Ap/Bp stars, a class of chemically peculiar stars. This class represents no more than 5-10% of the stars in this mass range. This small fraction is not explained by the fossil field paradigm that describes the Ap/Bp type magnetism as a remnant of an early phase of the star-life. Also, the limitation of the field measurements to a small and special group of stars is obviously a problem to study the effect of the magnetic fields on the stellar evolution of a typical intermediate-mass star.

Thanks to the improved sensitivity of a new generation of spectropolarimeters, a lower bound to the magnetic fields of Ap/Bp stars, a two orders of magnitude desert in the longitudinal magnetic field and a new type of sub-gauss magnetism first discovered on Vega have been identified. These advances provide new clues to understand the origin of intermediate-mass magnetism as well as its influence on stellar evolution. In particular, a scenario has been proposed whereby the magnetic dichotomy between Ap/Bp and Vega-like magnetism originate from the bifurcation between stable and unstable large scale magnetic configurations in differentially rotating stars. In this paper, we review these recent observational findings and discuss this scenario.
Magnetic fields in single late-type giants in the Solar vicinity: How common is magnetic activity on the giant branches?
Authors: Konstantinova-Antova Renada , Aurière Michel , Charbonnel Corinne , Drake Natalia , Wade Gregg , Tsvetkova Svetla , Petit Pascal , Schröder Klaus-Peter , Lèbre Agnes
Published: August 2014

We present our first results on a new sample containing all single G, K and M giants down to V = 4 mag in the Solar vicinity, suitable for spectropolarimetric (Stokes V) observations with Narval at TBL, France. For detection and measurement of the magnetic field (MF), the Least Squares Deconvolution (LSD) method was applied (Donati et al. 1997) that in the present case enables detection of large-scale MFs even weaker than the solar one (the typical precision of our longitudinal MF measurements is 0.1-0.2 G). The evolutionary status of the stars is determined on the basis of the evolutionary models with rotation (Lagarde et al. 2012; Charbonnel et al., in prep.) and fundamental parameters given by Massarotti et al. (1998). The stars appear to be in the mass range 1-4 M⊙, situated at different evolutionary stages after the Main Sequence (MS), up to the Asymptotic Giant Branch (AGB).

The sample contains 45 stars. Up to now, 29 stars are observed (that is about 64% of the sample), each observed at least twice. For 2 stars in the Hertzsprung gap, one is definitely Zeeman detected. Only 5 G and K giants, situated mainly at the base of the Red Giant Branch (RGB) and in the He-burning phase are detected. Surprisingly, a lot of stars ascending towards the RGB tip and in early AGB phase are detected (8 of 13 observed stars). For all Zeeman detected stars v sin i is redetermined and appears in the interval 2-3 km/s, but few giants with MF possess larger v sin i.
Polarimetry of R Aqr and PN M2-9
Authors: Navarro Silvana G. , Sabin Laurence , Ramírez Julio , Hiriart David
Published: August 2014

The bipolar or more complex morphology observed in planetary nebulae have been explained by two principal hypothesis: by the existence of a companion and an accreting disk or by the effects of magnetic field, (or a combination of both). Symbiotics are binary systems and some of them show morphologies similar to those observed on planetary nebulae. This fact could support the binary hypothesis for PNe. We have therefore performed polarimetric observations of symbiotic systems and some planetary nebulae in order, first to detect linear polarisation with POLIMA at the San Pedro Mártir observatory, and ultimately to prove the existence and physical properties of those disks. We present here the first results of a project dedicated to the analysis of the polarisation observed in evolved objects starting with the PN M2-9 and R Aqr.
Hall Effect in Neutron Star Crusts
Authors: Gourgouliatos K. N. , Cumming A.
Published: August 2014

The crust of Neutron Stars can be approximated by a highly conducting solid crystal lattice. The evolution of the magnetic field in the crust is mediated through Hall effect, namely the electric current is carried by the free electrons of the lattice and the magnetic field lines are advected by the electron fluid. Here, we present the results of a time-dependent evolution code which shows the effect Hall drift has in the large-scale evolution of the magnetic field. In particular we link analytical predictions with simulation results. We find that there are two basic evolutionary paths, depending on the initial conditions compared to Hall equilibrium. We also show the effect axial symmetry combined with density gradient have on suppressing turbulent cascade.
Axisymmetric and stationary magnetic field structures in neutron star crusts under various boundary conditions
Authors: Fujisawa Kotaro , Kisaka Shota
Published: August 2014

We have calculated many Hall equilibrium states within the neutron star crust under various boundary conditions in order to investigate the influences of the boundary conditions clearly. We have found two important features of these solutions. First, the magnitude of the core magnetic fields affects the toroidal to total magnetic field energy ratio within the crust (Et/E). If the core magnetic fields are vanished, the crustal toroidal magnetic fields become weak and the typical energy ratio is only Et / E ~ 0.1%. If the core magnetic fields are strong, however, the crustal toroidal magnetic fields become strong and the typical ratio reaches Et / E ~ 15%. Second, the core toroidal magnetic fields and the twisted magnetosphere around the star make the size of the crustal toroidal magnetic field regions large. Therefore if the strong core magnetic fields have strong toroidal component, both strength and size of the crustal toroidal magnetic fields become large. These results show that the Hall MHD evolutions would be deeply affected by both inner and outer boundary conditions.
Magnetars: the explosive character of a small class of strongly magnetized neutron stars
Authors: Rea Nanda
Published: August 2014

I will review our current knowledge on the most magnetic objects in the Universe, a small sample of neutron stars called magnetars. The powerful persistent high energy emission and the flares from these strongly magnetized (1015 Gauss) neutron stars are providing crucial information about the physics involved at these extremes conditions, reserving us many unexpected surprises.
NSMAXG: A new magnetic neutron star spectral model in XSPEC
Authors: Ho Wynn C. G.
Published: August 2014

The excellent sensitivity of X-ray telescopes, such as Chandra and XMM-Newton, is ideal for the study of cooling neutron stars, which can emit at these energies. In order to exploit the wealth of information contained in the high quality data, a thorough knowledge of the radiative properties of neutron star atmospheres is necessary. A key factor affecting photon emission is magnetic fields, and neutron stars are known to have strong surface magnetic fields. Here I briefly describe our latest work on constructing magnetic (B ≥ 1010 G) atmosphere models of neutron stars and the NSMAXG implementation of these models in XSPEC. Our results allow for more robust extractions of neutron star parameters from observations.
The future of evolutionary economics is in a vision from the past
Authors: STOELHORST J. W.
Published: August 2014

This essay comments on discussions of the future of evolutionary economics by Winter (2014) and Witt (2014). I agree with their assessment of evolutionary economics as a theoretically fragmented field that has had little success in effecting a paradigm shift in mainstream economics. However, I question if such a paradigm shift should be the primary goal of evolutionary economists. I argue that evolutionary economists could increase their impact if they would be willing and able to recast themselves as evolutionary social scientists. This was the vision for economics that Veblen held out more than a century ago. I lay out the theoretical building blocks for realizing this vision available today.
Stable Two-Dimensional Conductance Switch of Polyaniline Molecule Connecting to Graphene Nanoribbons
Authors: Fan Zhi-Qiang , Chen Ke-Qiu
Published: August 2014

Incorporating the characteristics of the single-layer graphene nanoribbon and the polyaniline molecule, we theoretically design a two-dimensional molecular device and investigate its transport properties by applying nonequilibrium Green's functions in combination with density-functional theory. The calculated results reveal that the arrangements of frontier molecular orbitals and the energy gap between the HOMO and the LUMO of an isolated polyaniline molecule are different between its two isolable states: full reduced leucoemeraldine base and full oxidized pernigraniline base. When a polyaniline molecule connects to two graphene nanoribbons as a two-dimensional molecular device, the conductance of its full oxidized pernigraniline base is much higher than the conductance of its full reduced leucoemeraldine base. The switch ratios of two bases' currents almost maintain a constant value before 0.8 V. In other word, the conductance switch behavior in our device is stable in a big bias region which makes it have a broader application in future logic and memory devices.
Preparation of poly(N-acetylaniline)–Prussian blue hybrid composite film and its application to hydrogen peroxide sensing
Authors: Zhou Lei , Wu Shouguo , Xu Haihong , Zhao Qiping , Zhang Zhixin , Yao Yao
Published: August 2014

A poly(N-acetylaniline)–Prussian blue (PNAANI–PB) hybrid composite film was prepared by co-electrodeposition.
Voltammetric determination of antifungal agents in pharmaceuticals and cosmetics using boron-doped diamond electrodes
Authors: Mielech-Łukasiewicz Katarzyna , Rogińska Katarzyna
Published: August 2014

This paper presents attractive methods for the determination of ketoconazole and ciclopirox olamine. The recommended procedures are based on oxidation of the said compounds on the BDD electrode. The properties of this electrode and the usage of the SWV technique facilitated the development of sensitive and accuracy procedures intended to determine the selected antifungal agents.
Simultaneous determination of berberine and palmatine in human plasma and in urine by capillary electrophoresis combined with polypropylene hollow fiber liquid–liquid–liquid microextraction
Authors: Song Tianhe , Zhang Kalin Yanbo , Lao Lixing , Lee Kai Fai , Wai Tang Sydney Chi , Ng Tzi Bun , Wing Sze Stephen Cho
Published: August 2014

A new assay is described for the determination of alkaloids using capillary electrophoresis combined with polypropylene hollow fiber liquid–liquid–liquid microextraction.
Fractionation of an ECM hydrogel into structural and soluble components reveals distinctive roles in regulating macrophage behavior
Authors: Slivka P. F. , Dearth C. L. , Keane T. J. , Meng F. W. , Medberry C. J. , Riggio R. T. , Reing J. E. , Badylak S. F.
Published: August 2014

Extracellular matrix (ECM) derived from mammalian tissues has been utilized to repair damaged or missing tissue and improve healing outcomes.
Gas-phase synthesis and reactivity of Cu+–benzyne complexes
Authors: Chai Yunfeng , Shen Shanshan , Weng Guofeng , Pan Yuanjiang
Published: August 2014

Cu+–benzyne complexes bearing ligands (L) were synthesized and their addition reactivity was studied in the gas phase using electrospray ionization ion trap mass spectrometry.
Dual effect of thiol addition on fluorescent polymeric micelles: ON-to-OFF emissive switch and morphology transition
Authors: Mabire Anne B. , Robin Mathew P. , Willcock Helen , Pitto-Barry Anaïs , Kirby Nigel , O'Reilly Rachel K.
Published: August 2014

Reaction with a thiol causes solution-state self-assembled block copolymer nanoparticles to undergo a simultaneous morphology transition from micelles to vesicles coupled to an ON-to-OFF switch in particle fluorescence.
Trapping atmospheric CO2 with gold
Authors: Collado Alba , Gómez-Suárez Adrián , Webb Paul B. , Kruger Hedi , Bühl Michael , Cordes David B. , Slawin Alexandra M. Z. , Nolan Steven P.
Published: August 2014

The ability of gold-hydroxides to fix CO2 is reported. [Au(IPr)(OH)] and [{Au(IPr)}2(μ-OH)][BF4] react with atmospheric CO2 to form the trigold carbonate complex [{Au(IPr)}3(μ3-CO3)][BF4].
Enhanced water stability of a microporous acylamide-functionalized metal–organic framework via interpenetration and methyl decoration
Authors: Zheng Baishu , Lin Xiu , Wang Zhaoxu , Yun Ruirui , Fan Yanpeng , Ding Mingsheng , Hu Xiaolian , Yi Pinggui
Published: August 2014

A microporous acylamide-functionalized MOF with a 2-fold interpenetrated and methyl decorated framework (HNUST-4) exhibits good water stability, high and selective CO2 uptake at ambient temperature.
CO dissociation on magnetic Fen clusters
Authors: Jedidi Abdesslem , Markovits Alexis , Minot Christian , Abderrabba Manef , Van Hove Michel A.
Published: August 2014

CO adsorption on iron clusters is studied using density functional theory. Both topologies and electronic structures are detailed. With increasing size, Fe clusters tend to dissociate CO.
Ion mobility and clustering of sodium hydroxybenzoates in aqueous solutions: a molecular dynamics simulation study
Authors: Gujt Jure , Podlipnik Črtomir , Bešter-Rogač Marija , Spohr Eckhard
Published: August 2014

At sufficiently high concentrations hydroxybenzoate anions in aqueous solutions form clusters of various sizes and shapes. Different degrees of cluster formation for each isomer lead to differences in their mobility.
Solvent effects and potential of mean force: a multilayered-representation quantum mechanical/molecular mechanics study of the CH3Br + CN− reaction in aqueous solution
Authors: Xu Yulong , Zhang Jingxue , Wang Dunyou
Published: August 2014

The potential of mean force for the CH3Br + CN− reaction was obtained at the CCSD(T)/MM level of theory using a multilayered-representation quantum mechanical/molecular mechanics approach, as well as the reactant, transition state and product complexes along the reaction pathway in aqueous solution.
Tuning electronic and magnetic properties of silicene with magnetic superhalogens
Authors: Zhao Tianshan , Zhang Shunhong , Wang Qian , Kawazoe Yoshiyuki , Jena Puru
Published: August 2014

Functionalized silicene with magnetic superhalogens has potential to be a magnetic half-metal.
Single-molecule electronics: from chemical design to functional devices
Authors: Sun Lanlan , Diaz-Fernandez Yuri A. , Gschneidtner Tina A. , Westerlund Fredrik , Lara-Avila Samuel , Moth-Poulsen Kasper
Published: August 2014

The use of single molecules in electronics represents the next limit of miniaturisation of electronic devices, which would enable to continue the trend of aggressive downscaling of silicon-based electronic devices.
Striking difference between alkane and olefin metathesis using the well-defined precursor [Si–O–WMe5]: indirect evidence in favour of a bifunctional catalyst W alkylidene–hydride
Authors: Riache N. , Callens E. , Espinas J. , Dery A. , Samantaray M. K. , Dey R. , Basset J. M.
Published: August 2014

Metathesis of linear alkanes versus olefins using supported multifunctional catalyst gives a very striking different distribution of metathesis products.
New PtIIdiimine–dithiolate complexes containing a 1,2-dithiolate-1,2-closo-dicarbadodecarborane: an experimental and theoretical investigation
Authors: Pintus Anna , Aragoni M. Carla , Coles Simon J. , Coles (née Huth) Susanne L. , Isaia Francesco , Lippolis Vito , Musteti Ana-Daniela , Teixidor Francesc , Viñas Clara , Arca Massimiliano
Published: August 2014

A new class of solvatochromic diimine–dithiolate complexes [Pt(N^N)(dtoc)] (dtoc2−= 1,2-dithiolate-1,2-closo-dicarbadodecaborane) is reported.
A computational study of the mechanism for water oxidation by (bpc)(bpy)RuIIOH2
Authors: Wang Ying , Ahlquist Mårten S. G.
Published: August 2014

A mechanistic study on the catalytic cycle water oxidation with1[(bpc)(bpy)RuIIOH2]+(Hbpc = 2,2′-bipyridine-6-carboxylic acid, bpy = 2,2′-bipyridine) is described in this paper.
Future paper based printed circuit boards for green electronics: fabrication and life cycle assessment
Authors: Liu Jingping , Yang Cheng , Wu Haoyi , Lin Ziyin , Zhang Zhexu , Wang Ronghe , Li Baohua , Kang Feiyu , Shi Lei , Wong Ching Ping
Published: August 2014

A multilayer printed circuit board (PCB) can be fabricated using commercially available printing paper, which shows comparable functionalities with the conventional organic PCBs but 100 times lower environmental impact.
Rational design of MoS2@graphene nanocables: towards high performance electrode materials for lithium ion batteries
Authors: Kong Debin , He Haiyong , Song Qi , Wang Bin , Lv Wei , Yang Quan-Hong , Zhi Linjie
Published: August 2014

A unique MoS2@graphene nanocable with a novel contact model between MoS2 nanosheets and graphene has been developed for high-performance lithium storage.
Self-assembly of azobenzene-based two-component gels
Authors: Zhang Yuan , Xue Pengchong , Yao Boqi , Sun Jiabao
Published: August 2014

Two-component gels were formed and their photophysical properties were dependent on the ratio of the two compounds.
Peptide modified gold nanoparticles for improved cellular uptake, nuclear transport, and intracellular retention
Authors: Yang C. , Uertz J. , Yohan D. , Chithrani B. D.
Published: August 2014

A novel hyperspectral imaging technique is used to image GNPs: a combination of three peptides is used for efficient nuclear targeting and improved retention of GNPs targeted into the nucleus is shown for the first time. This is important for future cancer therapeutics as GNPs can be used as radiation dose enhancers and anticancer drug carriers.
Low-temperature CVD synthesis of patterned core–shell VO2@ZnO nanotetrapods and enhanced temperature-dependent field-emission properties
Authors: Yin Haihong , Yu Ke , Song Changqing , Wang Zhiliang , Zhu Ziqiang
Published: August 2014

ZnO nanotetrapods were used as templates, and patterned VO2@ZnO nanotetrapods were grown on an ITO/glass substrate via a low-temperature CVD method. These VO2@ZnO nanotetrapods showed strongly enhanced temperature-dependent FE properties.
A facile method for the synthesis of quaternary Ag–In–Zn–S alloyed nanorods
Authors: Tang Xiaosheng , Zang Zhigang , Zu Zhiqiang , Chen Weiwei , Liu Yan , Han Genquan , Lei Xiaohua , Liu Xianmin , Du Xiaoqin , Chen Weimin , Wang Yu , Xue Junmin
Published: August 2014

Ag–In–Zn–S nanorods with tunable photoluminescence were synthesized by a facile approach.
Confining Pt nanoparticles in porous carbon structures for achieving durable electrochemical performance
Authors: Yang C. , Zhou M. , Xu Q.
Published: August 2014

Uniformly confining Pt nanoparticles in porous carbon structure can give rise to remarkably improved stability and long-term catalytic performance for carbon-supported Pt electrocatalsyts.
Design of polyhedral oligomeric silsesquioxane (POSS) based thermo-responsive amphiphilic hybrid copolymers for thermally denatured protein protection applications
Authors: Li Zibiao , Tan Beng H. , Jin Guorui , Li Kai , He Chaobin
Published: August 2014

Hybrid micelles for simple and spontaneous protein protection using easily controllable temperature as the sole trigger in an “on-demand” fashion.
MoS2 nanosheet production by the direct exfoliation of molybdenite minerals from several type-localities
Authors: Savjani Nicky , Lewis Edward A. , Pattrick Richard A. D. , Haigh Sarah J. , O'Brien Paul
Published: August 2014

This work raises the possibility that the unrefined mineral molybdenite could be used as a cost-effective source of MoS2 nanosheets.
Efficient synthesis of glycosylamines in solventless conditions promoted by mechanical milling
Authors: Lingome Cédric Epoune , Pourceau Gwladys , Gobert-Deveaux Virginie , Wadouachi Anne
Published: August 2014

A mecanosynthesis of glycosylamines under solventless conditions was established. This environmentally friendly approach optimized with l-rhamnose, was investigated using a variety of amines and other carbohydrates.
Facile microcapsule fabrication by spray deposition of a supramolecular hydrogel
Authors: Shundo Atsuomi , Hoshino Yuuki , Higuchi Takahiro , Matsumoto Yuji , Penaloza Jr David P. , Matsumoto Keigo , Ohno Masashi , Miyaji Katsuaki , Goto Masahiro , Tanaka Keiji
Published: August 2014

When a supramolecular hydrogel, that was based on the self-assembly of low-molecular-weight molecules, was sprayed onto a solid substrate, the resultant residue after drying off the water contained microcapsules composed of the fibrils.
Enhanced photocatalytic behavior and excellent electrochemical performance of hierarchically structured NiO microspheres
Authors: Wang Xiong , Mao Huimin , Shan Yuchen
Published: August 2014

The obtained Hierarchically structured nickel oxide exhibits excellent photocatalytic and electrochemical performances.
A facile synthesis of hierarchical TiO2for dye adsorption and photocatalysis
Authors: Lai Lu-Lu , Wu Jin-Ming
Published: August 2014

Hierarchical flower-like H2Ti5O11·3H2O assembled with radial nanowires was fabricated through a template-free solution-based method, which could be converted to TiO2with controllable morphologies and phases by a subsequent acid-treating or annealing process.
Synthesis of randomly aminated polyvinylpyrrolidone and its use in the preparation of hydrolyzable conjugates
Authors: Prado Anselmo del , Navarro Rodrigo , Gallardo Alberto , Elvira Carlos , Reinecke Helmut
Published: August 2014

Preparation of side-aminated polyvinylpyrrolidones and their potential application as pH-sensitive drug-conjugate carriers.
Metal-organic frameworks (MOFs) as precursors towards TiOx/C composites for photodegradation of organic dye
Authors: Guo Zhengang , Cheng Jin Kiat , Hu Zhigang , Zhang Mei , Xu Qing , Kang Zixi , Zhao Dan
Published: August 2014

TiOx/C composites were prepared by pyrolyzing MIL-125 that exhibited excellent catalytic activities towards the photodegradation of methylene blue.
Easy procedure to prepare nitrogen-containing activated carbons for supercapacitors
Authors: Shang Tong-Xin , Zhang Ming-Yang , Jin Xiao-Juan
Published: August 2014

The urea-formaldehyde resin adhesive in waste medium density fiberboard play a role in modifying the activated carbons.
Catalytic performance of AuIII supported on SiO2 modified activated carbon
Authors: Tian Xiaohui , Hong Guotai , Liu Ying , Jiang BinBo , Yang Yongrong
Published: August 2014

SiO2 modified activated carbon was used as a composite support for gold to enhance its catalytic stability in the acetylene hydrochlorination reaction.
Preparation of composite electrodes with carbon nanotubes for lithium-ion batteries by low-energy ball milling
Authors: Tao T. , Rahman M. M. , Ramireddy T. , Sunarso J. , Chen Y. , Glushenkov A. M.
Published: August 2014

A method to prepare oxide–carbon nanotube composite electrodes for lithium-ion batteries has been demonstrated. A phase with severe transport limitations, LiFeTiO4, has been selected as a model electrode material.
Reduction of surface area of lignin improves enzymatic hydrolysis of cellulose from hydrothermally pretreated wheat straw
Authors: Sipponen M. H. , Pihlajaniemi V. , Pastinen O. , Laakso S.
Published: August 2014

24 h enzymatic hydrolysis (15 FPU g−1) of solid residues from wheat straw autohydrolysis. Cellulose conversion as a function of lignin content (left) or lignin surface area (right) in solid residues.
Palladacycle-catalyzed Suzuki–Miyaura reaction of aryl/heteroaryl halides with MIDA boronates in EtOH/H2O or H2O
Authors: Li Yabo , Wang Jingran , Wang Zhiwei , Huang Mengmeng , Yan Beiqi , Cui Xiuling , Wu Yusheng , Wu Yangjie
Published: August 2014

With good to excellent yields, a series of mono- or diheteroaryl compounds were synthesizedviathe palladacycle-catalyzed Suzuki–Miyaura reaction of variousN-methyliminodiacetic acid (MIDA) boronates with aryl/heteroaryl halides in EtOH/H2O or H2O.
Conjugated oligomers incorporating azulene building blocks – seven- vs. five-membered ring connectivity
Authors: Amir Elizabeth , Murai Masahito , Amir Roey J. , Cowart John S. , Chabinyc Michael L. , Hawker Craig J.
Published: August 2014

The properties of isomeric azulene derivatives based on 7- versus 5-membered ring substitution were examined by the synthesis and characterization of well-defined electroactive oligomers.
Discovery of a tetracontinuous, aqueous lyotropic network phase with unusual 3D-hexagonal symmetry
Authors: Sorenson Gregory P. , Schmitt Adam K. , Mahanthappa Mahesh K.
Published: August 2014

An aliphatic gemini dicarboxylate surfactant is shown to form a new 3D-hexagonal lyotropic liquid crystalline phase with P63/mcm symmetry.
Design of tetraphenyl silsesquioxane based covalent-organic frameworks as hydrogen storage materials
Authors: Li Xiao-Dong , Zang Hua-Ping , Wang Jun-Tao , Wang Jun-Fei , Zhang Hong
Published: August 2014

Four tetraphenyl silsesquioxane based covalent-organic frameworks (sil-COFs) have been designed under a ctn or bor net topology as high-capacity hydrogen storage materials.
Enhanced photocatalytic activity of hydroxylated and N-doped anatase derived from amorphous hydrate
Authors: Fan Chenyao , Chen Chao , Wang Jia , Fu Xinxin , Ren Zhimin , Qian Guodong , Wang Zhiyu
Published: August 2014

Controlling the degree of disorder to prepare hydroxylated and N-doped TiO2 with various colours and enhanced photocatalytic activity.
An efficient near infrared photocatalyst of Er3+/Tm3+/Yb3+tridoped (CaWO4@(TiO2/CaF2)) with multi-stage CaF2nanocrystal formation
Authors: Huang Shouqiang , Lou Ziyang , Shan Aidang , Zhu Nanwen , Feng Kaili , Yuan Haiping
Published: August 2014

A near-infrared photocatalyst, Er3+/Tm3+/Yb3+tridoped (CaWO4@(TiO2/CaF2) is presented, in which the CaF2nanocrystals are converted from CaWO4precursors in a multi-stage process, and the remaining CaWO4are wrapped in CaF2and TiO2nanocrystals to form a heterostructure.
Nanostructured cobalt sulfide-on-fiber with tunable morphology as electrodes for asymmetric hybrid supercapacitors
Authors: Rakhi R. B. , Alhebshi Nuha A. , Anjum D. H. , Alshareef H. N.
Published: August 2014

Porous cobalt sulfide (Co9S8) nanostructures with tunable morphology directly nucleated over carbon fiber are evaluated as electrodes for asymmetric hybrid supercapacitors.
Flexible free-standing hydrogen-treated titanium dioxide nanowire arrays as a high performance anode for lithium ion batteries
Authors: Liu Yi , Liu Chunjie , Li Jianle
Published: August 2014

Herein, we fabricate flexible free-standing TiO2 nanowire arrays and create Ti3+ (oxygen vacancy) via hydrogenation to improve the electrical conductivity.
DTBDT-TTPD: a new dithienobenzodithiophene-based small molecule for use in efficient photovoltaic devices
Authors: Cheon Ye Rim , Kim Yu Jin , Back Jang Yeol , An Tae kyu , Park Chan Eon , Kim Yun-Hi
Published: August 2014

We designed and synthesized a dithienobenzodithiophene-based molecule with a planar molecular geometry, DTBDT-TTPD. It showed low band gap, deep HOMO level and the photovoltaic characteristics included a power conversion efficiency as high as 4.48%.
Synthesis and properties of silicon/magnesium silicon nitride diatom frustule replicas
Authors: Ødegård Ivar Andre , Romann Julien , Fossdal Anita , Røyset Arne , Tranell Gabriella
Published: August 2014

A novel method for the conversion of diatom bio-silica structures into nano-porous 3D silicon/magnesium silicon nitride replicas utilising simultaneous metallothermic reduction and nitriding is described. Optical, chemical and structural characterization of the replicas is also presented.
Towards industrialization of polymer solar cells: material processing for upscaling
Authors: Burgués-Ceballos Ignasi , Stella Marco , Lacharmoise Paul , Martínez-Ferrero Eugenia
Published: August 2014

In this review, we provide insights into the key aspects of material processing for the industriallization of organic solar cells. Upscaling techniques like doctor blade, inkjet printing, screen printing and roll-to-roll slot die are analyzed.
Spontaneous interlayer formation in OPVs by additive migration due to additive–metal interactions
Authors: Deckman Igal , Moshonov Moshe , Obuchovsky Stas , Brener Reuven , Frey Gitti L.
Published: August 2014

Additive–metal interactions can induce additive migration to the organic/electrode interface to spontaneously form interlayers that affect the metal work function and enhance OPV device performance.
Synthesis and characterization of water soluble biomimetic chitosans for bone and cartilage tissue regeneration
Authors: Lord Megan S. , Tsoi Bonny M. , Farrugia Brooke L. , Simon Ting S. R. , Baker Shenda , Wiesmann William P. , Whitelock John M.
Published: August 2014

Sulfated chitosan-arginine was synthesized to replicate growth factor-binding glycosaminoglycans. This material promoted cartilage formation from human progenitor cells while chitosan-arginine promoted bone.
A pH-responsive amphiphilic chitosan–pyranine core–shell nanoparticle for controlled drug delivery, imaging and intracellular pH measurement
Authors: Chou Hao-Syun , Hsiao Meng-Hsuan , Hung Wei-Yang , Yen Tin-Yo , Lin Hui-Yi , Liu Dean-Mo
Published: August 2014

A new type of CHC–PY core–shell nanoparticle provides multiple functionality, where a synergistic performance of nanotherapeutics, imaging and even diagnosis at a cellular resolution can be achieved simultaneously.
Photorefractive performances of a graphene-doped PATPD/7-DCST/ECZ composite
Authors: Chantharasupawong Panit , Christenson Cory W. , Philip Reji , Zhai Lei , Winiarz Jeffrey , Yamamoto Michiharu , Tetard Laurene , Nair Rahul R. , Thomas Jayan
Published: August 2014

We demonstrate the application of graphene-based materials to improve the speed and sensitivity of photorefractive polymers.
Biocompatibility of graphene oxide intravenously administrated in mice—effects of dose, size and exposure protocols
Authors: Liu Jia-Hui , Wang Tiancheng , Wang Haifang , Gu Yongen , Xu Yingying , Tang Huan , Jia Guang , Liu Yuanfang
Published: August 2014

The toxicity of graphene oxide intravenously injected into mice was dramatically tuned by dose, size and exposure protocols of graphene oxide.
Uptake of gold nanoparticles in primary human endothelial cells
Authors: Klingberg Henrik , B. Oddershede Lene , Loeschner Katrin , Larsen Erik H. , Loft Steffen , Møller Peter
Published: August 2014

Single-particle resolution techniques show that endothelial cells internalise 80 nm unmodified gold nanoparticles by endocytosis with subsequent transport to vesicles.
Flaviviral RNAs: weapons and targets in the war between virus and host
Authors: Bidet Katell , Garcia-Blanco Mariano A.
Published: August 2014

Flaviviruses are a genus of (+)ssRNA (positive ssRNA) enveloped viruses that replicate in the cytoplasm of cells of diverse species from arthropods to mammals. Many are important human pathogens such as DENV-1–4 (dengue virus types 1–4), WNV (West Nile virus), YFV (yellow fever virus), JEV (Japanese encephalitis virus) and TBEV (tick-borne encephalitis). Given their RNA genomes it is not surprising that flaviviral life cycles revolve around critical RNA transactions. It is these we highlight in the present article. First, we summarize the mechanisms governing flaviviral replication and the central role of conserved RNA elements and viral protein–RNA interactions in RNA synthesis, translation and packaging. Secondly, we focus on how host RNA-binding proteins both benefit and inhibit flaviviral replication at different stages of their life cycle in mammalian hosts. Thirdly, we cover recent studies on viral non-coding RNAs produced in flavivirus-infected cells and how these RNAs affect various aspects of cellular RNA metabolism. Together, the article puts into perspective the central role of flaviviral RNAs in modulating both viral and cellular functions.
Ethically Navigating the Maze of Billing, Documentation, and Reimbursement for Dysphagia Services in Long-Term Care
Authors: Casper Mary L.
Published: August 2014

Speech-language pathologists (SLPs) have an obligation to accurately record the services that they provide according to the guidelines from the patient's payer, meeting the expectations in the state's practice act and in keeping with the employer's policies relative to billing practices. Accurate, complete, and timely documentation of dysphagia services is a requirement of the ASHA Code of Ethics, as well as an expectation of employers and third-party payers, and is subject to review when determining coverage for claims submitted. Acquiring a familiarity with the myriad of policies, rules, regulations, and expectations can be likened to finding a way through a maze. Clinicians need to balance effective dysphagia service delivery with the demands of the various payers and the regulatory requirements in the SNF to practice in an ethical manner.
Dysphagia Following Prolonged Endotracheal Intubation: Is There A Rule of Thumb?
Authors: Coyle James L.
Published: August 2014

Prolonged endotracheal intubation is a common iatrogenic cause of swallowing disorders. Clinicians frequently seek a decision-making algorithm to determine appropriate timing of assessment, predict the course of recovery, and determine the need for interventions. Many risk factors are present in any patient requiring mechanical ventilation through an artificial airway, making each case a complex and unique puzzle. This paper reviews the literature regarding effects of prolonged endotracheal intubation and risk factors for adverse events, and underscores the uncertainty inherent in management after extubation.
Updates on the Epidemiology and Pattern of Traumatic Maxillofacial Injuries in a Nigerian University Teaching Hospital: A 12-Month Prospective Cohort In-Hospital Outcome Study
Authors: Olusanya AdeolaAdenike , Adeleye AmosOlufemi , Aladelusi TimothyOlukunle , Fasola AbiodunOlubayo
Published: August 2014

Many studies have been undertaken in Nigeria on maxillofacial trauma. However, only a few have considered both the skeletal and soft tissue injuries (in general) involving all the aspects of the maxillofacial region or considered other etiological sources of trauma apart from road traffic crashes. Fewer still have reviewed the outcome of management of facial injuries in our low-resource environment. This study sets out to examine the recent trends in both the clinical and epidemiological patterns of all facial injuries from all causes seen in a low-resource practice of a developing country. It also assessed the in-hospital treatment outcomes, and the levels of the patients’ satisfaction with treatment received in this setting. Over a 12-month period, the clinical records of consecutive patients who were evaluated and treated for maxillofacial injuries in our unit were prospectively acquired, entered into predesigned forms and subsequently analyzed. There were 259 patients (79.5% males) during the study period. The mean age was 32.21(± 16.588) years. Overall, motor bike crashes, 42.1%, were the commonest source of these traumas; and armed robbery was the commonest form (69.0%) of assault. Mandibular fractures were the commonest maxillofacial fractures (37.8%) whereas head injury had the highest frequency among the associated injuries (71.4%). Closed reduction and immobilization was deployed in 88.0% of those who had treatment and majority was satisfied with the esthetic outcome of the treatment received. Mean length of hospital stay was 12.6 (± 4.423) days. Maxillofacial trauma poses a significant socioeconomic burden on affected individuals in this study population. This is made worse by the presence of associated injuries in the other body systems. More local studies on the outcome of management of maxillofacial trauma will improve the available literature in this region.
Simulation of the Raman spectra of CO2: Bridging the gap between algebraic models and experimental spectra
Authors: Lemus R. , Sánchez-Castellanos M. , Pérez-Bernal F. , Fernández J. M. , Carvajal M.
Published: August 2014

The carbon dioxide Raman spectrum is simulated within an algebraic approach based on curvilinear coordinates in a local representation. The two main advantages of the present algebraic approach are a possible connection with configuration space and the correct description of systems with either local or normal mode character. The system Hamiltonian and polarizability tensor are expanded in terms of curvilinear coordinates. The curvilinear coordinates are in turn expanded into normal coordinates, obtaining an algebraic representation in terms of normal bosonic operators. A canonical transformation maps the operators into a local algebraic representation. The final step is an anharmonization procedure to local operators. The Raman spectrum of CO2 has been simulated, obtaining results close to experimental accuracy, and polarizability transition moments for the Raman spectral lines between 1150 cm−1 and 1500 cm−1 are reported. The comparison between experimental and simulated spectra has provided six new CO2 experimental vibrational terms.
Simultaneous use of camera and probe diagnostics to unambiguously identify and study the dynamics of multiple underlying instabilities during the route to plasma turbulence
Authors: Thakur S. C. , Brandt C. , Light A. , Cui L. , Gosselin J. J. , Tynan G. R.
Published: August 2014

We use multiple-tip Langmuir probes and fast imaging to unambiguously identify and study the dynamics of underlying instabilities during the controlled route to fully-developed plasma turbulence in a linear magnetized helicon plasma device. Langmuir probes measure radial profiles of electron temperature, plasma density and potential; from which we compute linear growth rates of instabilities, cross-phase between density and potential fluctuations, Reynold's stress, particle flux, vorticity, time-delay estimated velocity, etc. Fast imaging complements the 1D probe measurements by providing temporally and spatially resolved 2D details of plasma structures associated with the instabilities. We find that three radially separated plasma instabilities exist simultaneously. Density gradient driven resistive drift waves propagating in the electron diamagnetic drift direction separate the plasma into an edge region dominated by strong, velocity shear driven Kelvin-Helmholtz instabilities and a central core region which shows coherent Rayleigh-Taylor modes propagating in the ion diamagnetic drift direction. The simultaneous, complementary use of both probes and camera was crucial to identify the instabilities and understand the details of the very rich plasma dynamics.