bluuebunny/crossref_metadata_2025 huggingface dataset:
Three-body problem, the measure of oscillating types. A short review
Authors: Marchal Christian
Published: January 2015

The theoretical three body problem, with three given non infinitesimal point masses, has two types of oscillating motions. In the first type at least two mutual distances are unbounded, but their inferior limit is bounded: there are an infinite number of larger and larger ejections, but without escape. In the second type, it is the velocities that are unbounded: there are an infinite number of nearer and nearer quasi-collisions, without exact collisions.

The first type has only a theoretical interest: its measure in phase space is zero. But the second type has a positive measure in phase space and a physical interest: it governs most of the collisions of stars.
On the orbital structure of the HD 82943 multi-planet system
Authors: Baluev Roman V. , Beaugé Cristian
Published: January 2015

HD 82943 hosts a mysterious multi-planet system in the 2:1 mean-motion resonance that puzzles astronomers for more than a decade. We describe our new analysis of all radial velocity data currently available for this star, including both the most recent Keck data and the older but more numerous CORALIE measurements.

Here we pay a major attention to the task of optimal scheduling of the future observation of this system. Applying several optimality criteria, we demonstrate that in the forthcoming observational season of HD 82943 (the winter 2014/2015) rather promising time ranges can be found. Observations of the near future may give rather remarkable improvement of the orbital fit, but only if we choose their time carefully.
Dynamics and Habitability in Binary Star Systems
Authors: Eggl Siegfried , Georgakarakos Nikolaos , Pilat-Lohinger Elke
Published: January 2015

Determining planetary habitability is a complex matter, as the interplay between a planet's physical and atmospheric properties with stellar insolation has to be studied in a self consistent manner. Standardized atmospheric models for Earth-like planets exist and are commonly accepted as a reference for estimates of Habitable Zones. In order to define Habitable Zone boundaries, circular orbital configurations around main sequence stars are generally assumed. In gravitationally interacting multibody systems, such as double stars, however, planetary orbits are forcibly becoming non circular with time. Especially in binary star systems even relatively small changes in a planet's orbit can have a large impact on habitability. Hence, we argue that a minimum model for calculating Habitable Zones in binary star systems has to include dynamical interactions.
Tidal evolution in multiple planet systems: application to Kepler-62 and Kepler-186
Authors: Bolmont Emeline , Raymond Sean N. , Leconte Jérémy , Correia Alexandre , Quintana Elisa
Published: January 2015

A large number of observed exoplanets are part of multiple planet systems. Most of these systems are sufficiently close-in to be tidally evolving. In such systems, there is a competition between the excitation caused by planet-planet interactions and tidal damping. Using as an example two multiple planet systems, which host planets in the surface liquid water habitable zone (HZ): Kepler-62 and Kepler-186, we show the importance and effect of both planetary and stellar tides on the dynamical evolution of planets and on the climate of the HZ planets.
Pebble Delivery for Inside-Out Planet Formation
Authors: Hu Xiao , Tan Jonathan C. , Chatterjee Sourav
Published: January 2015

Inside-Out Planet Formation (IOPF; Chatterjee & Tan 2014, hereafter CT14) is a scenario for sequential in situ planet formation at the pressure traps of retreating dead zone inner boundaries (DZIBs) motivated to explain the many systems with tightly packed inner planets (STIPs) discovered by Kepler. The scenario involves build-up of a pebble-dominated protoplanetary ring, supplied by radial drift of pebbles from the outer disk. It may also involve further build-up of planetary masses to gap-opening scales via continued pebble accretion. Here we study radial drift & growth of pebbles delivered to the DZIB in fiducial IOPF disk models.
On the relativistic Lagrange-Laplace secular dynamics for extrasolar systems
Authors: Sansottera M. , Grassi L. , Giorgilli A.
Published: January 2015

We study the secular dynamics of extrasolar planetary systems by extending the Lagrange-Laplace theory to high order and by including the relativistic effects. We investigate the long-term evolution of the planetary eccentricities via normal form and we find an excellent agreement with direct numerical integrations. Finally we set up a simple analytic criterion that allows to evaluate the impact of the relativistic effects in the long-time evolution.
1/1 resonant periodic orbits in three dimensional planetary systems
Authors: Antoniadou Kyriaki I. , Voyatzis George , Varvoglis Harry
Published: January 2015

We study the dynamics of a two-planet system, which evolves being in a 1/1 mean motion resonance (co-orbital motion) with non-zero mutual inclination. In particular, we examine the existence of bifurcations of periodic orbits from the planar to the spatial case. We find that such bifurcations exist only for planetary mass ratios $\rho=\frac{m_2}{m_1}<0.0205$. For ρ in the interval 0<ρ<0.0205, we compute the generated families of spatial periodic orbits and their linear stability. These spatial families form bridges, which start and end at the same planar family. Along them the mutual planetary inclination varies. We construct maps of dynamical stability and show the existence of regions of regular orbits in phase space.
Empirically Derived Dynamical Models for the 55 Cancri and GJ 876 Planetary Systems
Authors: Nelson Benjamin E. , Ford Eric B. , Wright Jason T. , Fischer Debra A.
Published: January 2015

In this paper we present empirically derived dynamical models for the 55 Cancri and GJ 876 planetary systems.
Diagrams of stability of circumbinary planetary systems
Authors: Popova Elena
Published: January 2015

The stability diagrams in the “pericentric distance — eccentricity” plane of initial data are built and analyzed for Kepler-38, Kepler-47, and Kepler-64 (PH1). This completes a survey of stability of the known up to now circumbinary planetary systems, initiated by Popova & Shevchenko (2013), where the analysis was performed for Kepler-16, 34, and 35. In the diagrams, the planets appear to be “embedded” in the fractal chaos border; however, I make an attempt to measure the “distance” to the chaos border in a physically consistent way. The obtained distances are compared to those given by the widely used numerical-experimental criterion by Holman & Wiegert (1999), who employed smooth polynomial approximations to describe the border. I identify the resonance cells, hosting the planets.
Transit observations with the three San Pedro Mártir telescopes
Authors: Ricci D. , Reyes-Ruiz M. , Michel R. , Ayala-Loera C. , Ramón-Fox G. , Fox Machado L. , Navarro-Meza S. , Brown Sevilla S. , Curiel S.
Published: January 2015

Exoplanetary transit observations were carried out for the first time with all the three telescopes at the San Pedro Mártir National Astronomical Observatory in Baja California, Mexico.

We present preliminary results on WASP-39 and WASP-43, two Hot Jupiters known for the presence of a highly-inflated radius. Using the defocused photometry technique, we observed these systems, achieving photometric precision of ± 3–5mmag peak-to-valley. The preliminary fit of their lightcurves shows physical and orbital parameters consistent with published results.
Ranking in-orbit fragmentations and space objects
Authors: Rossi Alessandro , Valsecchi Giovanni B. , Alessi Elisa Maria
Published: January 2015

The future space debris environment will be dominated by the production of fragments coming from massive fragmentations. In order to identify the most relevant parameters influencing the long term evolution of the environment and to assess the criticality of selected space objects in different regions of the circumterrestrial space, a large parametric study was performed. In this framework some indicators were produced to quantify and rank the relevance of selected fragmentations on the long term evolution of the space debris population. Based on the results of the fragmentation studies, a novel analytic index, the Criticality of Spacecraft Index, aimed at ranking the environmental criticality of abandoned objects in LEO, has been devised and tested on a sample population of orbiting objects.
New methods for space debris collision assessment
Authors: Casanova Daniel , Tardioli Chiara , Lemaître Anne
Published: January 2015

Collisions between two pieces of space debris or between a piece of debris and an operative satellite is a real problem. Furthermore, collisions are responsible for the creation of new space debris systematically. The way to exclude the possibility of a collision consists of analysing the trajectories and looking for a time of coincidence. However, the analysis of all pairs of objects collected in a large orbit catalogue is unfeasible. The proposed method consists of reducing the possible pairs of candidates for a collision into a short list of pairs at real risk of collision. The method is based on a three-filter sequence: the first two filters are based on the geometry of the orbits, while the third one searches for a time of coincidence. This new method is tested resulting into an efficient tool for space debris collision assessment.
The family of Quasi-satellite periodic orbits in the circular co-planar RTBP
Authors: Pousse Alexandre , Robutel Philippe , Vienne Alain
Published: January 2015

In the circular case of the coplanar Restricted Three-body Problem, we studied how the family of quasi-satellite (QS) periodic orbits allows to define an associated libration center. Using the averaged problem, we highlighted a validity limit of this one: for QS orbits with low eccentricities, the averaged problem does not correspond to the real problem. We do the same procedure to L3, L4 and L5 emerging periodic orbits families and remarked that for very high eccentricities ${\cal F}_{L_4}$ and ${\cal F}_{L_5}$ merge with ${\cal F}_{L_3}$ which bifurcates to a stable family.
Excluding interlopers from asteroid families
Authors: Radović Viktor , Novaković Bojan
Published: January 2015

To study an asteroid family it is crucial to determine reliably the list of its members, i.e. to reduce the number of interlopers as much as possible. However, as the number of known asteroids increases fast it becomes more and more difficult to obtain robust list of members of an asteroid family. To cope with these challenges we are proposing a new approach that may help to significantly reduce presence of interlopers among the family members.
Long-term evolution of asteroids in the 2:1 Mean Motion Resonance
Authors: Skoulidou Despoina K. , Tsiganis Kleomenis , Varvoglis Harry
Published: January 2015

The problem of the origin of asteroids residing in the Jovian first-order mean motion resonances is still open. Is the observed population survivors of a much larger population formed in the resonance in primordial times? Here, we study the evolution of 182 long-lived asteroids in the 2:1 Mean Motion Resonance, identified in Brož & Vokrouhlické (2008). We numerically integrate their trajectories in two different dynamical models of the solar system: (a) accounting for the gravitational effects of the four giant planets (i.e. 4-pl) and (b) adding the terrestrial planets from Venus to Mars (i.e. 7-pl). We also include an approximate treatment of the Yarkovksy effect (as in Tsiganis et al.2003), assuming appropriate values for the asteroid diameters.
Spin-orbit coupling and chaotic rotation for eccentric coorbital bodies
Authors: Leleu Adrien , Robutel Philippe , Correia Alexandre C. M.
Published: January 2015

The presence of a co-orbital companion induces the splitting of the well known Keplerian spin-orbit resonances. It leads to chaotic rotation when those resonances overlap.
Effects of planetary mass accretion on the planets migration: the disk structures
Authors: Álvarez Ramiro , Nagel Erick
Published: January 2015

We develop numerical tools to detect and quantify the mass and area for all structures of a protoplanetary disk with different optical depths. We consider two planets of 0.1 MJ. They are initially at 12.5 and 20 AU embedded in a viscous disk, where planetary mass accretion and migration are allowed. We find a gap region with optically thick streams, this region is characterized by an optically thin filling factor near to 1. Additionally, we generate the Spectral Energy Distribution of each structure of the disk considering silicate dust. Our tools are useful to identify the locations of structures and sub-structures as possible sites where the material is accumulated.
Rapid clump formation in discs of young stellar objects class O-I
Authors: Stoyanovskaya Olga P. , Snytnikov Valeriy N.
Published: January 2015

The formation of planetesimals and large bodies in circumstellar discs can be referred to the stage of massive unstable disc emerging due to the gravitational collapse in the molecular cloud. We have simulated the dynamics of gas and boulder clumps in such systems. The features of instability development in massive disc is discussed. Unlike medium-massive discs the massive disc can provide conditions for simultaneous formation of several clumps as a result of overdensity ring fragmentation. We found regimes where 3, 2 or 1 overdensity ring appear in the disc and then fragment into clumps collecting about a half of the disc mass.
AtPHT4;4 is a chloroplast-localized ascorbate transporter in Arabidopsis
Authors: Miyaji Takaaki , Kuromori Takashi , Takeuchi Yu , Yamaji Naoki , Yokosho Kengo , Shimazawa Atsushi , Sugimoto Eriko , Omote Hiroshi , Ma Jian Feng , Shinozaki Kazuo , Moriyama Yoshinori
Published: January 2015

Ascorbate is an antioxidant and coenzyme for various metabolic reactions in vivo. In plant chloroplasts, high ascorbate levels are required to overcome photoinhibition caused by strong light. However, ascorbate is synthesized in the mitochondria and the molecular mechanisms underlying ascorbate transport into chloroplasts are unknown. Here we show that AtPHT4;4, a member of the phosphate transporter 4 family of Arabidopsis thaliana, functions as an ascorbate transporter. In vitro analysis shows that proteoliposomes containing the purified AtPHT4;4 protein exhibit membrane potential- and Cl−-dependent ascorbate uptake. The AtPHT4;4 protein is abundantly expressed in the chloroplast envelope membrane. Knockout of AtPHT4;4 results in decreased levels of the reduced form of ascorbate in the leaves and the heat dissipation process of excessive energy during photosynthesis is compromised. Taken together, these observations indicate that the AtPHT4;4 protein is an ascorbate transporter at the chloroplast envelope membrane, which may be required for tolerance to strong light stress.
A Pliable Electroporation Patch (ep-Patch) for Efficient Delivery of Nucleic Acid Molecules into Animal Tissues with Irregular Surface Shapes
Authors: Wei Zewen , Huang Yuanyu , Zhao Deyao , Hu Zhiyuan , Li Zhihong , Liang Zicai
Published: January 2015

Delivery of nucleic acids into animal tissues by electroporation is an appealing approach for various types of gene therapy, but efficiency of existing methodsis not satisfactory. Here we present the validation of novel electroporation patch (ep-Patch) for efficient delivery of DNA and siRNA into mouse tissues. Using micromachining technology, closely spaced gold electrodes were made on the pliable parylene substrate to form a patch-like electroporation metrics. It enabled large coverage of the target tissues and close surface contact between the tissues and electrodes, thus providing a uniform electric field to deliver nucleic acids into tissues, even beneath intact skin. Using this ep-Patch for efficiently delivery of both DNA and siRNA, non-invasive electroporation of healthy mouse muscle tissue was successfully achieved. Delivery of these nucleic acids was performed to intact tumors with satisfactory results. Silencing of tumor genes using the ep-Patch was also demonstrated on mice. This pliable electroporation patch method constitutes a novel way of in vivo delivery of siRNA and DNA to certain tissues or organs to circumvent the disadvantages of existing methodologies for in vivo delivery of nucleic acid molecules.
Simulation of the ground states of spin rings with cavity-assisted neutral atoms
Authors: Xue Peng , Zhan Xiang , Bian Zhihao
Published: January 2015

Quantum phase transitions occur when the ground state of a Hamiltonian undergoes qualitative changes with a control parameter changing. In this paper we consider a particular system—an Isng-type spin ring with competing many-body interactions. Depending on the relative strength interactions, the ground state of the system is either a product state or entangled state. We implement the system in a cavity-assisted neutral atomic simulator and study the non-locality and entanglement of the simulated ground state of an Ising-type three-spin ring with the control parameter changing. The simplicity of the setup and its robustness to noise give it a great practicality within the framework of current experimental technology.
Focus-independent particle size measurement from streak images: a comparison of multivariate methods
Authors: Tazik Shawna K. , Pearl Megan R. , Rekully Cameron M. , Viole Nicholas S. , DeJong Stephanie A. , Shaw Timothy J. , Richardson Tammi L. , Myrick Michael L.
Published: January 2015

Fluorescent particles in-flow are imaged and sized regardless of their degree of focus using image processing and multivariate calibration.
Rapid microstructure characterization of polymer thin films with 2D-array multifocus Raman microspectroscopy
Authors: Samuel Ashok Zachariah , Yabumoto Sohshi , Kawamura Kenichi , Iwata Koichi
Published: January 2015

Multifocus Raman imaging is one of the fast-imaging alternatives to the conventional single point mapping technique.
Effect of hematocrit on blood dynamics on a compact disc platform
Authors: Kar Shantimoy , Dash Monika , Maiti Tapas Kumar , Chakraborty Suman
Published: January 2015

We investigate blood flow dynamics on a rotationally actuated lab-on-a-compact disk (LOCD) platform, as a function of the hematocrit level of the blood sample.
Coupling carbon nanotube film microextraction with desorption corona beam ionization for rapid analysis of Sudan dyes (I–IV) and Rhodamine B in chilli oil
Authors: Chen Di , Huang Yun-Qing , He Xiao-Mei , Shi Zhi-Guo , Feng Yu-Qi
Published: January 2015

A rapid analysis method by coupling carbon nanotube film (CNTF) microextraction with desorption corona beam ionization (DCBI) is presented.
In situ electrochemical synthesis of Ni-capped electrochemiluminescence nanoprobe for ultrasensitive detection of cancer cells
Authors: Wen Qingqing , Yang Pei-Hui
Published: January 2015

A facile, novel and in situ electrochemical synthesis of a Ni-capped (NiS@CdS/PANINF) composite electrochemiluminescence (ECL) nanoprobe was developed to fabricate an ECL cytosensor for the ultrasensitive detection of cancer cells.
Multi-site cyclization via initial C–H activation using a rhodium(iii) catalyst: rapid assembly of frameworks containing indoles and indolines
Authors: Huang Ji-Rong , Qin Liu , Zhu Yu-Qin , Song Qiang , Dong Lin
Published: January 2015

Tandem multi-site cyclization triggered by Rh(iii)-catalyzed C–H activation has been achieved for highly efficient synthesis of spirocycle indolin-3-one (C2-cyclization), benzo[a]carbazole (C3-cyclization) and an unusual indoxyl core (N1-cyclization).
A fundamental study on the [(μ-Cl)3Mg2(THF)6]+ dimer electrolytes for rechargeable Mg batteries
Authors: Liu Tianbiao , Cox Jonathan T. , Hu Dehong , Deng Xuchu , Hu Jianzhi , Hu Mary Y. , Xiao Jie , Shao Yuyan , Tang Keqi , Liu Jun
Published: January 2015

The long sought [MgCl]+ solution species in the Mg-dimer electrolytes was characterized by soft mass spectrometry.
Template-free TiO2 hollow submicrospheres embedded with SnO2 nanobeans as a versatile scattering layer for dye-sensitized solar cells
Authors: Wang Chih-Liang , Liao Jin-Yun , Zhao Yubao , Manthiram Arumugam
Published: January 2015

Nanobean SnO2-embedded TiO2 hollow submicrospheres as a scattering layer of dye-sensitized solar cells allow to simultaneously promote dye adsorption, light harvesting, and electron transport, leading to 28% improvement in the conversion efficiency compared to film-based SnO2.
Biocatalytic conversion of ethylene to ethylene oxide using an engineered toluene monooxygenase
Authors: Carlin D. A. , Bertolani S. J. , Siegel J. B.
Published: January 2015

We report the first recombinant enzyme in E. coli capable of transforming ethylene to ethylene oxide.
Surfactant free superparamagnetic iron oxide nanoparticles for stable ferrofluids in physiological solutions
Authors: Mandel K. , Straßer M. , Granath T. , Dembski S. , Sextl G.
Published: January 2015

Ferrofluids of superparamagnetic Fe3O4 nanoparticles with “patchy” silica shell are stable over a wide pH range and in physiological solutions.
Transition-metal-free persulfuration to construct unsymmetrical disulfides and mechanistic study of the sulfur redox process
Authors: Xiao Xiao , Feng Minghao , Jiang Xuefeng
Published: January 2015

A sulfur redox process has been developed between sulfinate and thiosulfate, which efficiently affords diverse unsymmetrical disulfides and provides a new method to modify pharmaceuticals and natural products with this biologically active moiety without extra oxidant or reductant.
Remote rearrangement of the metal center in a (η6-C6Me6)Ru(ii) complex
Authors: Takano Koichi , Ikeda Yousuke , Kodama Shintaro , Ishii Youichi
Published: January 2015

Reaction of [(η6-C6Me6)Ru(Ph)(PMe3)]+ with internal alkynes gave rise to the 1,4-Ru migration to form the o-vinylaryl complex, providing the first example of 1,4-metal migration of a group 8 metal center; in one case further isomerization to an η3-allyl complex was observed.
Rhodium(iii)-catalyzed C–H activation and intermolecular annulation with terminal alkynes: from indoles to carbazoles
Authors: Jia Jinlong , Shi Jingjing , Zhou Jie , Liu Xuelei , Song Yanling , Xu H. Eric , Yi Wei
Published: January 2015

A new and mild Rh(iii)-catalyzed intermolecular annulation of indoles with terminal alkynes for the direct synthesis of carbazoles has been developed.
A theoretical study of asymmetric electron transport through linearly aromatic molecules
Authors: Liu Hongmei , He Yuanyuan , Zhang Jinjiang , Zhao Jianwei , Chen Li
Published: January 2015

Rectification properties can be achieved in linearly conjugated molecules by tuning the position of a side π-bridge.
Anodization control for barrier-oxide thinning and 3D interconnected pores and direct electrodeposition of nanowire networks on native aluminium substrates
Authors: Gillette Eleanor , Wittenberg Stefanie , Graham Lauren , Lee Kwijong , Rubloff Gary , Banerjee Parag , Lee Sang Bok
Published: January 2015

A 3D interconnecting network of AAO pores is designed to be compatible with a barrier layer thinning technique, allowing direct electrodeposition of Ni nanostructures into the pore network using the native aluminum as a substrate.
Modeling of catalytically active metal complex species and intermediates in reactions of organic halides electroreduction
Authors: Lytvynenko Anton S. , Kolotilov Sergey V. , Kiskin Mikhail A. , Eremenko Igor L. , Novotortsev Vladimir M.
Published: January 2015

Quantum chemical calculations of the species that form or can potentially form in reductive electrocatalytic dehalogenation of organic compounds (both halide reduction intermediates and catalytically active complex species).
Electrochemical lithiation performance and characterization of silicon–graphite composites with lithium, sodium, potassium, and ammonium polyacrylate binders
Authors: Han Zhen-Ji , Yamagiwa Kiyofumi , Yabuuchi Naoaki , Son Jin-Young , Cui Yi-Tao , Oji Hiroshi , Kogure Akinori , Harada Takahiro , Ishikawa Sumihisa , Aoki Yasuhito , Komaba Shinichi
Published: January 2015

Performances of Si–graphite electrodes are highly improved by using alkali-neutralized polyacrylate binders.
Orthometallation of N-substituents at the NHC ligand of [Rh(Cl)(COD)(NHC)] complexes: its role in the catalytic hydrosilylation of ketones
Authors: Lázaro Guillermo , Fernández-Alvarez Francisco J. , Munárriz Julen , Polo Víctor , Iglesias Manuel , Pérez-Torrente Jesús J. , Oro Luis A.
Published: January 2015

Orthometallation of one N-substituent of the NHC ligand in Rh-NHC species affords hydrido-bridged binuclear rhodium(iii) complexes which have proven to be resting states in catalytic ketone hydrosilylation reactions.
Synthesis and anticancer activity evaluation of η5-C5(CH3)4R ruthenium complexes bearing chelating diphosphine ligands
Authors: Rodríguez-Bárzano A. , Lord R. M. , Basri A. M. , Phillips R. M. , Blacker A. J. , McGowan P. C.
Published: January 2015

A series of ruthenium complexes with η5-C5(CH3)4R and diphosphine ligands have been synthesised and evaluated in vitro as anticancer agents. IC50 values in the nanomolar range have been obtained against two types of cell lines.
Photoinduced interactions of two dirhodium complexes with d(GTCGAC)2 probed by 2D NOESY
Authors: Palmer Alycia M. , Knoll Jessica D. , Turro Claudia
Published: January 2015

2D 1H–1H NOESY reveals that irradiation of cis-H,H-[Rh2(HNOCCH3)2(dppz)(CH3CN)4]2+ results in covalent binding and end-capping of the complex to d(GTCGAC)2.
Intense photo- and tribo-luminescence of three tetrahedral manganese(ii) dihalides with chelating bidentate phosphine oxide ligand
Authors: Chen Jun , Zhang Qing , Zheng Fa-Kun , Liu Zhi-Fa , Wang Shuai-Hua , Wu A-Qing , Guo Guo-Cong
Published: January 2015

Three air-stable centrosymmetric tetrahedral manganese(ii) dihalide complexes with chelating bidentate phosphine oxide ligand display intense green photoluminescence with a total quantum yield varying from 32 to 70% and vivid triboluminescence.
To new beginnings and a better alternative
Authors: Cwiertny David M.
Published: January 2015

David M. Cwiertny, Editor-in-Chief of Environmental Science: Water Research & Technology, introduces the inaugural issue.
Fabrication and characterization of the nano-composite of whey protein hydrolysate chelated with calcium
Authors: Xixi Cai , Lina Zhao , Shaoyun Wang , Pingfan Rao
Published: January 2015

The chelation of calcium ions to WPH caused molecular folding and aggregation leading to the formation of a WPH-calcium chelate of nanoparticle size, and the principal sites of calcium-binding corresponded to the carboxyl groups and carbonyl groups of WPH. The WPH-calcium chelate could significantly improve calcium absorption at the intestinal level.
Bioaccessibility of polyphenols associated with dietary fiber and in vitro kinetics release of polyphenols in Mexican ‘Ataulfo’ mango (Mangifera indica L.) by-products
Authors: Blancas-Benitez Francisco J. , Mercado-Mercado Gilberto , Quirós-Sauceda Ana E. , Montalvo-González Efigenia , González-Aguilar Gustavo A. , Sáyago-Ayerdi Sonia G.
Published: January 2015

The biological properties of polyphenol (PP) depend on its bioaccessibility and bioavailability.
Mortar samples from the Abbey of Saint John at Müstair: a combined spatially resolved X-ray fluorescence and X-ray absorption (XANES) study
Authors: Hormes Josef , Xiao Qunfeng , Hu Yongfeng , Bläuer Christine , Diekamp Anja , Goll Jürg , Bovenkamp G.-Lisa
Published: January 2015

Three mortar samples from the Abbey of Saint John, in the Swiss village of Mustair have been investigated using synchrotron radiation based techniques (XRF and XANES).
Synthesis and biological evaluation of pentanedioic acid derivatives as farnesyltransferase inhibitors
Authors: Yang Liuqing , Liu Wei , Mei Hanbing , Zhang Yuan , Yu Xiaojuan , Xu Yufang , Li Honglin , Huang Jin , Zhao Zhenjiang
Published: January 2015

The present study reports a series of novel potent farnesyltransferase inhibitors from chemical modifications of the lead compounds, such as compound 13n with an IC50 value of 0.0029 μM.
SnO2nanotube arrays embedded in a carbon layer for high-performance lithium-ion battery applications
Authors: Um Ji Hyun , Yu Seung-Ho , Cho Yong-Hun , Sung Yung-Eun
Published: January 2015

SnO2nanotube arrays embedded in a carbon layer were fabricated via a simple sol–gel method, which has shown good battery performance.
A tough, smart elastomeric bio-based hyperbranched polyurethane nanocomposite
Authors: Thakur Suman , Karak Niranjan
Published: January 2015

A self-healable and shape-recoverable tough hyperbranched polyurethane and iron oxide–reduced graphene oxide nanocomposite is fabricated by an in situ polymerization technique.
Ultrathin porous hierarchically textured NiCo2O4–graphene oxide flexible nanosheets for high-performance supercapacitors
Authors: Mitchell Elias , Jimenez Ashley , Gupta Ram K. , Gupta Bipin Kumar , Ramasamy Karthik , Shahabuddin Mohammad , Mishra Sanjay R.
Published: January 2015

A high-performance and flexible NiCO2O4–GO electrode for supercapacitor applications was fabricated using an electrochemical deposition method.
Highly regio- and diastereo-selective synthesis of novel tri- and tetra-cyclic perhydroquinoline architectures via an intramolecular [3 + 2] cycloaddition reaction
Authors: Bakthadoss M. , Kannan D. , Srinivasan J. , Vinayagam V.
Published: January 2015

A facile and efficient synthetic protocol was established for the construction of novel tri- and tetra-cyclic pyrrolo/pyrrolizinoquinoline architectures via an intramolecular [3 + 2] cycloaddition reaction strategy.
P-stereogenic PNP pincer-Pd catalyzed intramolecular hydroamination of amino-1,3-dienes
Authors: Yang Zehua , Xia Chao , Liu Delong , Liu Yangang , Sugiya Masashi , Imamoto Tsuneo , Zhang Wanbin
Published: January 2015

A new P-stereogenic PNP pincer-Pd complex was readily prepared and was used in the asymmetric intramolecular hydroamination of amino-1,3-dienes, with the desired products being obtained in good yields and with excellent regioselectivities and up to moderate enantioselectivities.
A novel enantioselective synthesis of 6H-dibenzopyran derivatives by combined palladium/norbornene and cinchona alkaloid catalysis
Authors: Xu Di , Dai Li , Catellani Marta , Motti Elena , Della Ca’ Nicola , Zhou Zhiming
Published: January 2015

Chiral dibenzopyran derivatives were obtained by cinchona alkaloid, as organocatalyst, in combination, for the first time, with palladium/norbornene catalytic system.
Formamidine hydrochloride as an amino surrogate: I2-catalyzed oxidative amidation of aryl methyl ketones leading to free (N–H) α-ketoamides
Authors: Liu Shan , Gao Qinghe , Wu Xia , Zhang Jingjing , Ding Kerong , Wu Anxin
Published: January 2015

A highly efficient molecular iodine catalyzed oxidative amidation of aryl methyl ketones has been developed. This reaction represents a novel strategy for the synthesis of free (N–H) α-ketoamides.
Antioxidative and antimicrobial activities of the extracts from the seed coat of Bambara groundnut (Voandzeia subterranea)
Authors: Klompong Vilailak , Benjakul Soottawat
Published: January 2015

Antioxidative and antimicrobial activities of extracts from Bambarra groundnut seed coat, prepared using water, ethanol and acetone as the media at various temperatures (30, 60, 90 °C) were investigated.
Preparation, characterization, and catalytic application of nano Ag/ZnO in the oxidation of benzylic C–H bonds in sustainable media
Authors: Hosseini-Sarvari Mona , Ataee-Kachouei Tahereh , Moeini Fatemeh
Published: January 2015

Nano Ag/ZnO as a heterogeneous catalyst for the oxidation of benzylic C–H bonds in air was demonstrated.
Investigation on the optimization, design and microwave absorption properties of reduced graphene oxide/tetrapod-like ZnO composites
Authors: Zhang Long , Zhang Xiaohui , Zhang Guangjie , Zhang Zheng , Liu Shuo , Li Peifeng , Liao Qingliang , Zhao Yanguang , Zhang Yue
Published: January 2015

We demonstrated the excellent microwave absorption properties of RGO/tetrapod-like ZnO composites, and investigated the effects of RGO mass fractions and thickness of composites on microwave absorption properties in the range from 2 to 18 GHz.
Multicomponent hybrids of surfactant-capped lanthanide polyoxometalates and ZIF-8 with tuneable luminescence
Authors: Liu Chang , Yan Bing
Published: January 2015

Two kinds of surfactant-functionalized lanthanide polyoxometalates and ZIF-8 nanoparticles were diffused together in polymer hosts, whose luminescence colour can be tuned by adjusting the composing units to provide useful data for multicomponent hybrids.
Borohydride synthesis strategy to fabricate YBO3:Eu3+ nanophosphor with improved photoluminescence characteristics
Authors: Srivastava Shubham , Mondal Aparna , Sahu Niroj Kumar , Behera Shantanu K. , Nayak Bibhuti B.
Published: January 2015

Borohydride synthesized Eu3+-doped YBO3 exhibited better color purity and chromaticity co-ordinates as compared to phosphors derived from the solid state route.
Hyperbranched polysiloxane grafted graphene for improved tribological performance of bismaleimide composites
Authors: Yan Hongxia , Li Song , Jia Yuan , Ma Xiao Yan
Published: January 2015

Hyperbranched polysilane grafted reduced graphene oxide, marked as HBPSi-rGO, was synthesized by the reaction of hydrosilylation. The effects of HBPSi-rGO on tribological, mechanical and thermal performances of Bismaleimides have been studied.
Dynamic and static behavior of the E–E′ bonds (E, E′ = S and Se) in cystine and derivatives, elucidated by AIM dual functional analysis
Authors: Tsubomoto Yutaka , Hayashi Satoko , Nakanishi Waro
Published: January 2015

AIM-DFA (AIM dual functional analysis) is applied to the E–E′ bonds (E, E′ = S and Se) in R-cystine (1), its derivatives and MeEE′Me. The nature of E–E′ is elucidated by (θp, κp: dynamic behavior) and (R, θ: static behavior), through AIM-DFA.
Multiple target chemosensor: a fluorescent sensor for Zn(ii) and Al(iii) and a chromogenic sensor for Fe(ii) and Fe(iii)
Authors: Kim Yong Sung , Park Gyeong Jin , Lee Jae Jun , Lee Sun Young , Lee Seong Youl , Kim Cheal
Published: January 2015

A multifunctional fluorescent and colorimetric chemosensor for Zn2+, Al3+, Fe2+ and Fe3+ was designed and synthesized.
Efficient photocatalytic degradation of bisphenol A and dye pollutants over BiOI/Zn2SnO4 heterojunction photocatalyst
Authors: Yan Tao , Liu Hongye , Sun Meng , Wang Xiaodong , Li Mengmeng , Yan Qing , Xu Wenguo , Du Bin
Published: January 2015

The formation of a heterojunction between BiOI and Zn2SnO4 greatly enhanced the photocatalytic activity of BiOI/Zn2SnO4 composites.
An exonuclease III-aided “turn-on” fluorescence assay for mercury ions based on graphene oxide and metal-mediated “molecular beacon”
Authors: Zhou Ying , Xing Xiao-Jing , Pang Dai-Wen , Tang Hong-Wu
Published: January 2015

We present a low background, highly selective and amplified fluorescent sensor for Hg2+ using graphene oxide and Exo III.
Recovery rate and homogeneity of doping europium into luminescent metal hydrides by chemical analysis
Authors: Hahn R. , Kunkel N. , Hein C. , Kautenburger R. , Kohlmann H.
Published: January 2015

A study on recovery rate and homogeneity of the activator ion concentration in luminescent europium doped metal hydrides and a reliable method for reproducibly doping europium are presented.
Synthesis of pillar[n]arenes (n = 5 and 6) with deep eutectic solvent choline chloride 2FeCl3
Authors: Cao Jin , Shang Yuhan , Qi Bin , Sun Xuzhuo , Zhang Lei , Liu Huiwen , Zhang Haibo , Zhou Xiaohai
Published: January 2015

A novel and distinct method of preparing pillar[n]arenes with high selectivity and efficiency has been achieved by condensation of 1,4-dialkoxybenzene and paraformaldehyde with the deep eutectic solvent in CH2Cl2 at room temperature.
Hierarchical-like multipod γ-MnS microcrystals: solvothermal synthesis, characterization and growth mechanism
Authors: Qi Kezhen , Selvaraj Rengaraj , Jeong Uiseok , Al-Kindy Salma M. Z. , Sillanpää Mika , Kim Younghun , Tai Cheuk-wai
Published: January 2015

Hierarchical-like multipod γ-MnS microcrystals have been synthesized by a simple solvothermal method and their possible growth mechanisms were proposed.
Facile synthesis of novel size-controlled antibacterial hybrid spheres using silver nanoparticles loaded with poly-dopamine spheres
Authors: Luo Hongyong , Gu Changwei , Zheng Weihua , Dai Fei , Wang Xinling , Zheng Zhen
Published: January 2015

Sub-micrometer hybrid spheres with a poly-dopamine core and loaded with silver nanoparticles (NPs) were fabricated by a facile method. The new hybrid spheres show a strong antibacterial activity due to their special structure, effectively preventing silver NP aggregation.
Load‐aware user association with quality of service support in heterogeneous cellular networks
Authors: Zhou Tianqing , Huang Yongming , Fan Lixing , Yang Luxi
Published: January 2015

In this study, the authors propose a user association scheme with quality of service support for load balancing in heterogeneous cellular networks (HCNs), which jointly considers user's achievable rate and load level of each BS instead of only utilising the former. To reveal how HCNs should self‐organise, the authors formulate it as a network‐wide weighted utility maximisation problem. Note that the formulated problem is a non‐linear mixed‐integer one, and its optimal solutions may be very difficult to be found when it is large‐scale. To solve the proposed problem, the authors design a low‐complexity distributed algorithm via dual decomposition. Numerical results show that, compared with the range expansion association (REA) and best power association (BPA), the strategy has a higher load balancing level (LBL) and a lower call blocking probability (CBP). Meanwhile, the proposed algorithm occupies a very fast convergence rate when its parameters are set properly.
Thermal modelling of a passively cooled inverter for wave power
Authors: Baudoin Antoine , Boström Cecilia
Published: January 2015

Owing to very costly maintenance operations, the reliability of electrical systems for offshore renewable energy is a major issue to make electricity production economical. Therefore proper thermal management is essential in order to avoid the components from being damaged by excessive temperature increase. Both analytic and computational fluid dynamics (CFD) models were implemented to assess the temperature increase in the inverter installed in a submerged substation and during working conditions. It was shown that this inverter could transmit a total power of up to about 35 kW. This limit is dependent on a certain distance between the modules and a perfect thermal contact with the hull. The influence of several of such parameters as well as the efficiency of passive cooling were studied.
Controlling stored energy in a concentrating solar thermal power plant to maximise revenue
Authors: Cirocco Luigi R. , Belusko Martin , Bruno Frank , Boland John , Pudney Peter
Published: January 2015

New electricity generation technologies are often assessed using simple metrics such as average return, break‐even energy prices or levelised cost of electricity. These simple metrics do not always capture the full economic value of a technology, particularly those that can react quickly and efficiently to changes in demand. In a wholesale spot market, opportunities exist to capture greater revenues, as currently achieved by peak power plants. This study demonstrates the use of two complementary methods to determine how storage should be operated to maximise revenue. First, the authors formulate and solve the problem as a linear program. The results indicate that there are distinct control modes. They then use Pontryagin's principle to confirm that the optimal operating strategy has three distinct control modes: (i) store all collected power, without generating, (ii) generate using collected power only and (iii) generate at maximum capacity using both collected and stored power. The mode that should be used at any instant depends only on the spot price of electricity relative to a pair of critical prices. These critical prices depend on the total energy that will be collected and the turnaround efficiency of the storage system.
Rheological profile of boron nitride–ethylene glycol nanofluids
Authors: Żyła Gaweł , Witek Adam , Gizowska Magdalena
Published: January 2015

The paper presents the complete rheological profile of boron nitride (BN)–ethylene glycol (EG) nanofluids. Nanofluids have been produced by two-step method on the basis of commercially available powder of plate-like grains of nanometrical thickness. Viscoelastic structure has been determined in oscillatory measurements at a constant frequency and temperature. Viscosity and flow curves for these materials have been measured. Studies have shown that the Carreau model can be used for the modeling of dynamic viscosity curves of the material. The samples were tested for the presence of thixotropy. The dependence of viscosity on temperature was also examined. The effect of temperature on the dynamic viscosity of BN-EG nanofluids can be modelled with the use of Vogel-Fulcher-Tammann expression.
Electron diffraction data on nucleation and growth of an hcp phase in homogeneous (Ar) and heterogeneous (Ar-Kr) clusters
Authors: Danylchenko O. G. , Kovalenko S. I. , Konotop O. P. , Samovarov V. N.
Published: January 2015

The nucleation and growth of the hcp phase in homogeneous (Ar) and heterogeneous (Ar-Kr) clusters formed in adiabatically expanding supersonic jets of the inert gases are studied by electron diffraction. The average size of the clusters ranges from 2 × 103 to 1 × 105 atoms/cluster. A threshold size of the clusters is found at which an hcp phase forms along with the fcc structure. The relative amount of the hcp phase in the single crystal clusters increases with their size. The relative volume of the hcp phase in the heterogeneous clusters exceeds that in homogeneous clusters of the same size. A correlation is established between the relative volume of the hcp phase in the clusters and the number of “defect” planes contained in the fcc matrix from which hcp phase nucleates. It is found that in very large (δ ≥ 150 Å) polycrystalline aggregations the fraction of the hcp phase reaches a maximum and does not increase as the clusters become larger. A mechanism is proposed for the nucleation and growth of the hcp phase in inert gas clusters.
Experimental investigation and comparative analysis of Ni-18.75 at. % Fe alloy plasticity, in coarse-grained and nano-crystalline states in the 4.2–350 K temperature range
Authors: Tabachnikova E. D. , Podolskiy A. V. , Smirnov S. N. , Psaruk I. A. , Liao P. K.
Published: January 2015

The mechanical properties of a coarse-grained (CG) Ni-18.75 at. % Fe alloy, are studied in the temperature range of 4.2–350 K, under uniaxial compression and a constant strain rate. The average grain size is 35 μm. The temperature dependence of the yield stress is obtained, and the stress-strain curves are analyzed. The temperature dependences of flow stress, strain-rate sensitivity of flow stress, and the activation volume of plastic deformation, are obtained for a plastic strain of ε ≈ 2%. The thermal activation analysis of the experimental data of a coarse-grained alloy showed that plastic deformation at the 35–350 K temperature interval has a thermally-activated character, and is described by a single mechanism. The empirical estimates of the parameters of dislocation interaction with the local barriers, and estimates of the effective and internal stress, are obtained. A comparative analysis of the results is conducted, describing the properties of low-temperature thermally activated plastic deformation of the studied alloy, in both the CG and nanocrystalline (NC) states. It is concluded that in the CG state, within the studied temperature interval, the microscopic barriers controlling the thermally activated plastic flow, are different from the barriers in the NC state. The spectrum of local barriers, which can determine the thermally activated dislocation plasticity in NC and CG states, is discussed.
Planar dicyclic B6S6, B6S6−, and B6S62− clusters: Boron sulfide analogues of naphthalene
Authors: Li Da-Zhi , Bai Hui , Ou Ting , Chen Qiang , Zhai Hua-Jin , Li Si-Dian
Published: January 2015

Inorganic analogues of hydrocarbons or polycyclic aromatic hydrocarbons (PAHs) are of current interest in chemistry. Based upon global structural searches and B3LYP and CCSD(T) calculations, we present herein the perfectly planar dicyclic boron sulfide clusters: D2h B6S6 (1, 1Ag), D2h B6S6− (2, 2B3u), and D2h B6S62− (3, 1Ag). These are the global minima of the systems, being at least 0.73, 0.81, and 0.53 eV lower in energy, respectively, than their alternative isomers at the CCSD(T) level. The D2h structures feature twin B3S2 five-membered rings, which are fused together via a B2 unit and terminated by two BS groups. Bonding analyses show that the closed-shell B6S62− (3) cluster possesses 10 delocalized π electrons, closely analogous to the bonding pattern of the aromatic naphthalene C10H8. The B6S6− (2) and B6S6 (1) species are readily obtained upon removal of one or two π electrons from B6S62− (3). The results build a new analogous relationship between boron sulfide clusters and their PAH counterparts. The B6S6− (2) monoanion and B6S62− (3) dianion can be effectively stabilized in neutral LiB6S6 and Li2B6S6 salts, respectively.
Design of an ultrashort optical transmission cell for vacuum ultraviolet spectroscopy of supercritical fluids
Authors: Janik Ireneusz , Marin Timothy W.
Published: January 2015

We present the design and characteristics of an ultrathin flow cell optimized for vacuum ultraviolet transmission spectroscopy experiments on supercritical fluids. The cell operates satisfactorily at pressures up to 300 bar and temperatures up to 390 °C. The variable path length concept of the cell allows for optical transmission studies of analytes ranging from dense condensed-phase systems to gas-phase systems. The path length of the cell can be adjusted from hundreds of nanometers to hundreds of micrometers by an exchange of a variable thickness spacer sandwiched between two sapphire windows. In the path length range from nanometers to single micrometers, metal vapor deposited on one or both of the two sandwiched optical windows constitute the spacer. Spacers with thicknesses of 2 μm and greater can be constructed from simple commercially available metal foils. The cell has been used to measure the lowest-lying absorption band of water in both the vapor and condensed phases from room temperature up to and above the critical point. It has also found application in the studies of aqueous ions and nonaqueous liquids including various common organic solvents and carbon dioxide.
Electron-phonon interaction and thermal boundary resistance at the crystal-amorphous interface of the phase change compound GeTe
Authors: Campi Davide , Donadio Davide , Sosso Gabriele C. , Behler Jörg , Bernasconi Marco
Published: January 2015

Phonon dispersion relations and electron-phonon coupling of hole-doped trigonal GeTe have been computed by density functional perturbation theory. This compound is a prototypical phase change material of interest for applications in phase change non-volatile memories. The calculations allowed us to estimate the electron-phonon contribution to the thermal boundary resistance at the interface between the crystalline and amorphous phases present in the device. The lattice contribution to the thermal boundary resistance has been computed by non-equilibrium molecular dynamics simulations with an interatomic potential based on a neural network scheme. We find that the electron-phonon term contributes to the thermal boundary resistance to an extent which is strongly dependent on the concentration and mobility of the holes. Further, for measured values of the holes concentration and electrical conductivity, the electron-phonon term is larger than the contribution from the lattice. It is also shown that the presence of Ge vacancies, responsible for the p-type degenerate character of the semiconductor, strongly affects the lattice thermal conductivity of the crystal.