bluuebunny/crossref_metadata_2025 huggingface dataset:
Planetesimal fragmentation and giant planet formation: the role of planet migration
Authors: Guilera O. M. , Swoboda D. , Alibert Y. , de Elía G. C. , Santamaría P. J. , Brunini A.
Published: January 2015

In the standard model of core accretion, the cores of the giant planets form by the accretion of planetesimals. In this scenario, the evolution of the planetesimal population plays an important role in the formation of massive cores. Recently, we studied the role of planetesimal fragmentation in the in situ formation of a giant planet. However, the exchange of angular momentum between the planet and the gaseous disk causes the migration of the planet in the disk. In this new work, we incorporate the migration of the planet and study the role of planet migration in the formation of a massive core when the population of planetesimals evolves by planet accretion, migration, and fragmentation.
Terrestrial planet formation in low-mass disks: dependence with initial conditions
Authors: Ronco M. P. , de Elía G. C. , Guilera O. M.
Published: January 2015

In general, most of the studies of terrestrial-type planet formation typically use ad hoc initial conditions. In this work we improved the initial conditions described in Ronco & de Elía (2014) starting with a semi-analytical model wich simulates the evolution of the protoplanetary disk during the gas phase. The results of the semi-analytical model are then used as initial conditions for the N-body simulations. We show that the planetary systems considered are not sensitive to the particular initial distribution of embryos and planetesimals and thus, the results are globally similar to those found in the previous work.
Influence of the inclination damping on the formation of planetary systems
Authors: Sotiriadis Sotiris , Libert Anne-Sophie , Tsiganis Kleomenis
Published: January 2015

Highly non-coplanar extrasolar systems (e.g. Upsilon Andromedae) and unexpected spin-orbit misalignment of some exoplanets have been discovered. In Libert and Tsiganis (2011), a significant increase of the mutual inclination of some multi-planet systems has been observed during the type II migration, as a result of planet-planet scattering and/or resonant interactions between the planets. Here we investigate the effect of the inclination damping due to planet-disk interactions on the previous results, for a variety of planetary systems with different initial configurations and mass ratios. Using the damping formulae for eccentricity and inclination provided by the numerical hydrodynamical simulations of Bitschet al.(2013), we examine their impact on the possible multiple resonances between the planets and how the growth in eccentricity and inclination is affected.
Can we expect the massive discs around young stellar objects class O-I to be a birthplace of planetesimal?
Authors: Snytnikov Valeriy N. , Stoyanovskaya Olga P. , Stadnichenko Olga A.
Published: January 2015

Possibility of large bodies formation in massive discs of young stellar objects (YSO) class O-I was investigated. On the stage of YSO O-I the whole of factors: chemical composition of gas and solids, chemical catalytic reactions, the disc self-gravitation, the increased ratio of solids to gas surface density, adiabatic gas cooling provides favorable conditions for gravitational instabilities development. We simulated 3D dynamics of gas and dust under self-consistent gravitational field and reproduced the formation and evolution of the disc around the protostar. We found that for stars of Solar mass there are regimes when the disc of variable mass is unstable for the development of fast gravitational instabilities.
Imaging with a small number of photons
Authors: Morris Peter A. , Aspden Reuben S. , Bell Jessica E. C. , Boyd Robert W. , Padgett Miles J.
Published: January 2015

Low-light-level imaging techniques have application in many diverse fields, ranging from biological sciences to security. A high-quality digital camera based on a multi-megapixel array will typically record an image by collecting of order 105 photons per pixel, but by how much could this photon flux be reduced? In this work we demonstrate a single-photon imaging system based on a time-gated intensified camera from which the image of an object can be inferred from very few detected photons. We show that a ghost-imaging configuration, where the image is obtained from photons that have never interacted with the object, is a useful approach for obtaining images with high signal-to-noise ratios. The use of heralded single photons ensures that the background counts can be virtually eliminated from the recorded images. By applying principles of image compression and associated image reconstruction, we obtain high-quality images of objects from raw data formed from an average of fewer than one detected photon per image pixel.
Dislocation-mediated relaxation in nanograined columnar palladium films revealed by on-chip time-resolved HRTEM testing
Authors: Colla M. -S. , Amin-Ahmadi B. , Idrissi H. , Malet L. , Godet S. , Raskin J. -P. , Schryvers D. , Pardoen T.
Published: January 2015

The high-rate sensitivity of nanostructured metallic materials demonstrated in the recent literature is related to the predominance of thermally activated deformation mechanisms favoured by a large density of internal interfaces. Here we report time-resolved high-resolution electron transmission microscopy creep tests on thin nanograined films using on-chip nanomechanical testing. Tests are performed on palladium, which exhibited unexpectedly large creep rates at room temperature. Despite the small 30-nm grain size, relaxation is found to be mediated by dislocation mechanisms. The dislocations interact with the growth nanotwins present in the grains, leading to a loss of coherency of twin boundaries. The density of stored dislocations first increases with applied deformation, and then decreases with time to drive additional deformation while no grain boundary mechanism is observed. This fast relaxation constitutes a key issue in the development of various micro- and nanotechnologies such as palladium membranes for hydrogen applications.
MLST-based inference of genetic diversity and population structure of clinical Klebsiella pneumoniae, China
Authors: Guo Chenyi , Yang Xianwei , Wu Yarong , Yang Huiying , Han Yanping , Yang Ruifu , Hu Liangping , Cui Yujun , Zhou Dongsheng
Published: January 2015

Multilocus sequence typing was applied to a collection of 327 clinical isolates of Klebsiella pneumoniae from China, which was proven to be a good representative of the global diversity of K. pneumoniae. Three lineages L1 to L3 are presented in the population with limited genetic flow across different lineages. However, extremely high levels of recombination can be observed within lineages to the extent at which the alleles are associated almost randomly. Lineages L2 and L3 most likely represent highly specific subgroups of less-virulent K. pneumoniae with modified metabolic networks, while lineage L1 contains not only hypervirulent clones with massive acquisition of virulent genes but also ‘primitive and intermediate forms’ during evolution of hypervirulent K. pneumoniae.
Development and Validation of A 48-Target Analytical Method for High-throughput Monitoring of Genetically Modified Organisms
Authors: Li Xiaofei , Wu Yuhua , Li Jun , Li Yunjing , Long Likun , Li Feiwu , Wu Gang
Published: January 2015

The rapid increase in the number of genetically modified (GM) varieties has led to a demand for high-throughput methods to detect genetically modified organisms (GMOs). We describe a new dynamic array-based high throughput method to simultaneously detect 48 targets in 48 samples on a Fludigm system. The test targets included species-specific genes, common screening elements, most of the Chinese-approved GM events and several unapproved events. The 48 TaqMan assays successfully amplified products from both single-event samples and complex samples with a GMO DNA amount of 0.05 ng and displayed high specificity. To improve the sensitivity of detection, a preamplification step for 48 pooled targets was added to enrich the amount of template before performing dynamic chip assays. This dynamic chip-based method allowed the synchronous high-throughput detection of multiple targets in multiple samples. Thus, it represents an efficient, qualitative method for GMO multi-detection.
A single-step enzyme immunoassay capillary sensor composed of functional multilayer coatings for the diagnosis of marker proteins
Authors: Funano Shun-ichi , Sugahara Masato , Henares Terence G. , Sueyoshi Kenji , Endo Tatsuro , Hisamoto Hideaki
Published: January 2015

A single-step, easy-to-use enzyme immunoassay capillary sensor, composed of substrate-immobilized hydrophobic coating, hydrogel coating, and soluble coating containing an enzyme-labeled antibody, was developed.
Nuclear accumulation of anthracyclines in the endothelium studied by bimodal imaging: fluorescence and Raman microscopy
Authors: Majzner K. , Wojcik T. , Szafraniec E. , Lukawska M. , Oszczapowicz I. , Chlopicki S. , Baranska M.
Published: January 2015

Anthracycline antibiotics display genotoxic activity towards cancer cells but their clinical utility is limited by their cardiac and vascular toxicity.
Online SERS detection and characterization of eight biologically-active peptides separated by capillary zone electrophoresis
Authors: Negri Pierre , Sarver Scott A. , Schiavone Nicole M. , Dovichi Norman J. , Schultz Zachary D.
Published: January 2015

Sheath-flow SERS provides a low cost, sensitive and chemical specific detector for routine characterization of biomolecules following a CZE separation.
Wavelength-dependent penetration depth of near infrared radiation into cartilage
Authors: Padalkar M. V. , Pleshko N.
Published: January 2015

In this study, we established how the depth of penetration into cartilage varies throughout the NIR frequency range (4000–10 000 cm−1).
Analysis of volatile compounds in Chinese Laobaigan liquor using headspace solid-phase microextraction coupled with GC-MS
Authors: Du Liping , He Tingting , Li Wei , Wang Ruoyu , Xiao Dongguang
Published: January 2015

The volatile compounds in “Hengshui Laobaigan” liquor were detected by HS-SPME coupled with GC-MS. Five fibers were evaluated and compared, in terms of sensitivity and reproducibility, for the analysis of aroma compounds in Laobaigan liquor.
Determination of tannic acid based on luminol chemiluminescence catalyzed by cupric oxide nanoparticles
Authors: Li Guang-Wen , Hong Lei , Tong Meng-Sha , Deng Hao-Hua , Xia Xing-Hua , Chen Wei
Published: January 2015

Tannic acid was identified to inhibit the CL signal of CuO nanoparticles-catalyzed luminol–H2O2 system, and a flow injection method was developed for tannic acid determination.
Synthesis of nanoporous 1,2,4-oxadiazole networks with high CO2 capture capacity
Authors: Ko Dongah , Patel Hasmukh A. , Yavuz Cafer T.
Published: January 2015

Reproducible oxadiazole networks from silylated monomers show considerable CO2 uptake while being processable into membranes.
[Bmim]2SbCl5: a main group metal-containing ionic liquid exhibiting tunable photoluminescence and white-light emission
Authors: Wang Ze-Ping , Wang Jin-Yun , Li Jian-Rong , Feng Mei-Ling , Zou Guo-Dong , Huang Xiao-Ying
Published: January 2015

Presented is an antimony-based photoluminescent material, namely [Bmim]2SbCl5, exhibiting bright yellow and white light photoluminescence with quantum yield as high as 86.3%.
Nitrogen-doped Fe/Fe3C@graphitic layer/carbon nanotube hybrids derived from MOFs: efficient bifunctional electrocatalysts for ORR and OER
Authors: Li Ji-Sen , Li Shun-Li , Tang Yu-Jia , Han Min , Dai Zhi-Hui , Bao Jian-Chun , Lan Ya-Qian
Published: January 2015

A novel nitrogen-doped Fe/Fe3C@graphitic layer/carbon nanotube hybrid derived from MOFs has been first fabricated by a facile approach. The hybrid exhibited outstanding bifunctional electrocatalytic activity for ORR and OER.
A mitochondria-targetable fluorescent probe for peroxynitrite: fast response and high selectivity
Authors: Zhang Hongxing , Liu Jing , Sun Yuan-Qiang , Huo Yingying , Li Yaohua , Liu Weizhi , Wu Xiao , Zhu Nishu , Shi Yawei , Guo Wei
Published: January 2015

A mitochondria-targetable fluorescence probe, methyl(4-hydroxyphenyl)amino-substituted pyronin (1), was exploited, which could highly selectively sense peroxynitrite (ONOO−) within seconds.
Photodriven [2]rotaxane–[2]catenane interconversion
Authors: Tron Arnaud , Jacquot de Rouville Henri-Pierre , Ducrot Aurélien , Tucker James H. R. , Baroncini Massimo , Credi Alberto , McClenaghan Nathan D.
Published: January 2015

The reversible photocyclomerization of terminal anthracene units enables the interconversion between [2]rotaxane and [2]catenane molecular topologies.
An organocatalytic biomimetic approach to α-aminophosphonates
Authors: Kowalczyk Dorota , Albrecht Łukasz
Published: January 2015

A novel biomimetic approach to optically active α-aminophosphonates from readily available acylphosphonates employing chiral base catalysis.
Organometallic polyphosphorus and -arsenic ligands as linkers between pre-assembled linear CuI fragments
Authors: Fleischmann Martin , Dütsch Luis , Moussa Mehdi Elsayed , Schindler Andrea , Balázs Gábor , Lescop Christophe , Scheer Manfred
Published: January 2015

We present a simple route to multimetallic CuI building blocks and their interaction with organometallic polyphosphorus and -arsenic linkers affording in novel polynuclear complexes or one-dimensional coordination polymers.
A practical kit for micro-scale application of the ceiling crystallisation method
Authors: Adawy Alaa , Corbeek Wil , de Ronde Erik , van Enckevort Willem J. P. , de Grip Willem J. , Vlieg Elias
Published: January 2015

We present a crystal growth kit for an easy micro-scale application of the ceiling crystallisation method. The kit provides a convenient means for effectuating lab-based microgravity crystallisation conditions.
Optical properties and electronic transitions of DNA oligonucleotides as a function of composition and stacking sequence
Authors: Schimelman Jacob B. , Dryden Daniel M. , Poudel Lokendra , Krawiec Katherine E. , Ma Yingfang , Podgornik Rudolf , Parsegian V. Adrian , Denoyer Linda K. , Ching Wai-Yim , Steinmetz Nicole F. , French Roger H.
Published: January 2015

Ab initio-experimental investigation of UV optical properties and electronic transitions of B-DNA oligonucleotides.
A theoretical study on novel alkaline earth-based excess electron compounds: unique alkalides with considerable nonlinear optical responses
Authors: Sun Wei-Ming , Wu Di , Li Ying , Liu Jia-Yuan , He Hui-Min , Li Zhi-Ru
Published: January 2015

A series of novel excess electron compounds M(NH3)6NaCl and M(NH3)6Na2 (M = Mg and Ca) were designed, in which the lowest-energy M(NH3)6Na2 compounds are the first alkalides containing double alkali metal anions.
Supercapacitive behavior depending on the mesopore size of three-dimensional micro-, meso- and macroporous silicon carbide for supercapacitors
Authors: Kim Myeongjin , Oh Ilgeun , Kim Jooheon
Published: January 2015

A facile synthesis method is developed to prepare the three-dimensional micro-, meso- and macroporous silicon carbide spheres that exhibit a unique porous structure and morphology, resulting in high super-capacitive performance.
Co3O4 particles grown over nanocrystalline CeO2: influence of precipitation agents and calcination temperature on the catalytic activity for methane oxidation
Authors: Wu H. , Pantaleo G. , Di Carlo G. , Guo S. , Marcì G. , Concepción P. , Venezia A. M. , Liotta L. F.
Published: January 2015

Crystalline cobalt oxides were prepared by a precipitation method using three different precipitation agents, (NH4)2CO3, Na2CO3 and CO(NH2)2.
Sustainable production of dimethyl adipate by non-heme iron(iii) catalysed oxidative cleavage of catechol
Authors: Jastrzebski Robin , van den Berg Emily J. , Weckhuysen Bert M. , Bruijnincx Pieter C. A.
Published: January 2015

Selective catechol cleavage by a non-heme iron(iii) complex followed by hydrogenation and transesterifaction yields dimethyl adipate in a green and sustainable manner.
Monooxygenation of an appended phenol in a model system of tyrosinase: implications on the enzymatic reaction mechanism
Authors: Hamann Jessica Nadine , Rolff Malte , Tuczek Felix
Published: January 2015

A new model system of tyrosinase was established that performs an ortho-hydroxylation of the appended phenol in the absence of base.
Monodentate hydroxide as a super strong yet reversible active site for CO2capture from high-humidity flue gas
Authors: Liao Pei-Qin , Chen Huayao , Zhou Dong-Dong , Liu Si-Yang , He Chun-Ting , Rui Zebao , Ji Hongbing , Zhang Jie-Peng , Chen Xiao-Ming
Published: January 2015

Reversible chemisorption of CO2is realized by introducing monodentate hydroxide onto the pore surface of metal–organic frameworks.
Unexpected discovery of low-cost maricite NaFePO4as a high-performance electrode for Na-ion batteries
Authors: Kim Jongsoon , Seo Dong-Hwa , Kim Hyungsub , Park Inchul , Yoo Jung-Keun , Jung Sung-Kyun , Park Young-Uk , Goddard III William A. , Kang Kisuk
Published: January 2015

Maricite NaFePO4can function as an excellent cathode material for Na ion batteries, an unexpected result since it has been regarded as an electrochemically inactive electrode for rechargeable batteries.
First stages of siderite crystallisation during CO2 corrosion of steel evaluated using in situ synchrotron small- and wide-angle X-ray scattering
Authors: Ingham Bridget , Ko Monika , Laycock Nick , Kirby Nigel M. , Williams David E.
Published: January 2015

We use in situ synchrotron small- and wide-angle X-ray scattering (SAXS/WAXS) to demonstrate that the formation of crystalline siderite (FeCO3) during the corrosion of steel in CO2-saturated brine – a problem of practical interest relating to the growth of protective scales on the interior surface of oil and gas production pipelines – is preceded by the formation of a colloidal precipitate in the solution and an amorphous surface layer, both assumed to be amorphous ferrous carbonate. Grazing incidence SAXS shows instantaneous film formation upon the application of an anodic potential, followed by development of a separate population of particles at later times, then by the formation of crystalline species, observed by WAXS. These observations can be interpreted in terms of crystal nucleation within the amorphous surface layer. Traces of Cr3+ in the solution significantly accelerate the precipitation rate of the colloidal precursor and accelerate the appearance of the crystalline scale. We speculate on the significance of these observations for the nucleation, growth and morphology of the corrosion scale and hence its protectiveness.
Pharmacokinetic, partial pharmacodynamic and initial safety analysis of (−)-epicatechin in healthy volunteers
Authors: Barnett Christopher F. , Moreno-Ulloa Aldo , Shiva Sruti , Ramirez-Sanchez Israel , Taub Pam R. , Su Yongxuan , Ceballos Guillermo , Dugar Sundeep , Schreiner George , Villarreal Francisco
Published: January 2015

(−)-Epicatechin ((−)-EPI), a naturally occurring flavanol, has emerged as a likely candidate for cocoa-based product reported reductions in cardiometabolic risk.
Effects of Hyriopsis cumingii polysaccharides on angiogenesis, macrophage chemotaxis, proliferation and phagocytosis
Authors: Qiao Deliang , Wei Chuanbao , Ke Chunlin , Zeng Xiaoxiong
Published: January 2015

Hyriopsis cumingii polysaccharides (HCPS) showed anti-angiogenic activity and promoting effects on the chemotaxis, proliferation and phagocytosis of peritoneal macrophage.
In situ monitoring of corrosion processes by coupled micro-XRF/micro-XRD mapping to understand the degradation mechanisms of reinforcing bars in hydraulic binders from historic monuments
Authors: Grousset S. , Kergourlay F. , Neff D. , Foy E. , Gallias J.-L. , Reguer S. , Dillmann P. , Noumowé A.
Published: January 2015

In situ analyses under synchrotron XRD have highlighted the corrosion processes of a rebar embedded in concrete in the presence of chloride.
Laser-induced breakdown spectroscopy using laser pulses delivered by optical fibers for analyzing Mn and Ti elements in pig iron
Authors: Zeng Qingdong , Guo Lianbo , Li Xiangyou , He Chao , Shen Meng , Li Kuohu , Duan Jun , Zeng Xiaoyan , Lu Yongfeng
Published: January 2015

A portable FO-LIBS system can achieve comparable results with the conventional LIBS system.
Fast and cost-effective fabrication of large-area plasmonic transparent biosensor array
Authors: Intartaglia R. , Beke S. , Moretti M. , De Angelis F. , Diaspro A.
Published: January 2015

We report on the realization of large-area hydrophobic transparent substrates endowed with good plasmonic functionalities and low detection limits under ligand-free conditions, i.e. without stabilizing agents that hinder the detection capabilities.
Dimethylaminoethyl methacrylate copolymer-siRNA nanoparticles for silencing a therapeutically relevant gene in macrophages
Authors: Jain Ratnesh , Dandekar Prajakta , Loretz Brigitta , Koch Marcus , Lehr Claus-Michael
Published: January 2015

DMC nanoparticles target Bfl1/A1 gene in lung macrophages and effective silencing of Bfl1/A1 gene by DMC nanoparticles paves the way for research on alternative treatment strategies for tuberculosis.
Strong induction of iodothyronine deiodinases by chemotherapeutic selenocompounds
Authors: Stoedter M. , Renko K. , Ibáñez E. , Plano D. , Becker N.-P. , Martitz J. , Palop J. A. , Calvo A. , Sanmartín C. , Schomburg L.
Published: January 2015

Imidoselenocarbamates increase intracellular Se levels and DIO activities. The effects are cell- and compound-specific partly depending on their methyl- (A) or benzyl- (B) backbone.
Synthesis of proton caged disulphide compounds for gold nanoparticle functionalization
Authors: Sabbatella Gianfranco , Antonaroli Simonetta , Diociauti Marco , Nucara Alessandro , Carbone Marilena
Published: January 2015

Novel proton caged compounds have been synthesized, with a sulphur bridge to bind gold nanoparticles and release protons upon UV irradiation.
Substituted triphenylamines as building blocks for star shaped organic electronic materials
Authors: Lumpi Daniel , Holzer Brigitte , Bintinger Johannes , Horkel Ernst , Waid Simon , Wanzenböck Heinz D. , Marchetti-Deschmann Martina , Hametner Christian , Bertagnolli Emmerich , Kymissis Ioannis , Fröhlich Johannes
Published: January 2015

A series of star shaped organic semiconductors was synthesized and characterized. The applicability of these materials in organic electronic devices was demonstrated.
Synthesis of new ZnS–Bipy based hybrid organic–inorganic materials for photocatalytic reduction of 4-nitrophenol
Authors: Ramírez-Rave Sandra , Hernández-Gordillo Agileo , Calderón Héctor A. , Galano Annia , García-Mendoza Cinthia , Gómez Ricardo
Published: January 2015

4,4-Bipyridine ligand was attainted to react with ZnS surface forming ZnS–Bipy materials that are efficient catalysts for photoreduction of 4-nitrophenol.
The catalytic aerobic synthesis of quaternary α-hydroxy phosphonates via direct hydroxylation of phosphonate compounds
Authors: Gu Lijun , Jin Cheng , Zhang Hongtao
Published: January 2015

A highly efficient Cu-catalyzed direct hydroxylation of phosphonate compounds has been developed. This transformation provides a powerful method for the synthesis of quaternary α-hydroxy phosphonates in good yields.
Comment on “B38: an all-boron fullerene analogue” by J. Lv, Y. Wang, L. Zhu and Y. Ma, Nanoscale, 2014,6, 11692
Authors: Tai Truong Ba , Nguyen Minh Tho
Published: January 2015

Two structuresIandIIare almost degenerate in energy and the cluster B38can be considered to be of a transition size between 2D and 3D boron clusters.
Bright, efficient, and color-stable violet ZnSe-based quantum dot light-emitting diodes
Authors: Wang Aqiang , Shen Huaibin , Zang Shuaipu , Lin Qingli , Wang Hongzhe , Qian Lei , Niu Jinzhong , Song Li Lin
Published: January 2015

Highly stable violet-blue emitting ZnSe/ZnS core/shell QDs were synthesized and used as emitter in QD-LEDs, which achieved maximum brightness of 2632 cd/m2and peak EQE of 7.83%.
Nanoparticle delivery of chemosensitizers improve chemotherapy efficacy without incurring additional toxicity
Authors: Caster Joseph M. , Sethi Manish , Kowalczyk Sonya , Wang Edina , Tian Xi , Nabeel Hyder Sayed , Wagner Kyle T. , Zhang Ying-Ao , Kapadia Chintan , Man Au Kin , Wang Andrew Z.
Published: January 2015

We demonstrate proof of principle that nanoparticle delivery of chemosensitizers can improve efficacy of chemotherapy without increasing toxicity.
Highly enantioselective catalytic 1,3-dipolar cycloadditions of α-alkyl diazoacetates: efficient synthesis of functionalized 2-pyrazolines
Authors: Lee Sung Il , Kim Ka Eun , Hwang Geum-Sook , Ryu Do Hyun
Published: January 2015

Chiral oxazaborolidinium ion catalyzed 1,3-dipolar cycloaddition reaction of α-substituted diazoacetates gives functionalized 2-pyrazolines in high to excellent enantiomeric ratios.
“One-pot” synthesis of amidoxime via Pd-catalyzed cyanation and amidoximation
Authors: Yang Chu-Ting , Han Jun , Liu Jun , Gu Mei , Li Yi , Wen Jun , Yu Hai-Zhu , Hu Sheng , Wang Xiaolin
Published: January 2015

“One-pot” synthesis of amidoxime was developed for studies on the interactions between amidoxime and uranyl.
pH-responsive dendritic polyrotaxane drug-polymer conjugates forming nanoparticles as efficient drug delivery system for cancer therapy
Authors: Kang Yang , Zhang Xiao-Mei , Zhang Sheng , Ding Li-Sheng , Li Bang-Jing
Published: January 2015

pH stimuli-responsive controlled selective release of drugs at the endosomal compartments of the PR-g-DOX supramolecular micelles.
Nanoscale detection of metal-labeled copolymers in patchy polymersomes
Authors: Ruiz-Pérez Lorena , Madsen Jeppe , Themistou Efrosyni , Gaitzsch Jens , Messager Léa , Armes Steven P. , Battaglia Giuseppe
Published: January 2015

We report the synthesis and facile imaging of metal-labeled polymersome-forming block copolymersviaATRP and RAFT polymerization. The resulting polymersomes can be visualized using TEM, which allows resolution of single polymer chains.
Efficient and tunable fluorescence energy transfer via long-lived polymer excitons
Authors: Chen Wei , Sun Xingxing , Wang Xijun , Huang Qishen , Li Xinyang , Zhang Qun , Jiang Jun , Zhang Guoqing
Published: January 2015

A highly fluorescent polymer consisting of repeating pendant dye molecules, difluoroboron dibenzoylmethane (BF2dbm), and an end-capped Rhodamine B (RhB) exhibits efficient energy transfer (EnT) owing to long-lived polymer excitons.
Recent developments in micellar drug carriers featuring substituted poly(ε-caprolactone)s
Authors: Rainbolt Elizabeth A. , Washington Katherine E. , Biewer Michael C. , Stefan Mihaela C.
Published: January 2015

Synthetic modification of caprolactone monomers and polymers provides a route to self-assembling block copolymers for use in drug carrier applications.
Nanostructural heterogeneity in polymer networks and gels
Authors: Di Lorenzo F. , Seiffert S.
Published: January 2015

Many polymer gels display network defects and crosslinking inhomogeneity. This review reflects and interrelates investigations on the characterization of such polymer-network heterogeneity and on its impact on the swelling, elasticity, and permeability of polymer gels.
Activation of sucrose-derived carbon spheres for high-performance supercapacitor electrodes
Authors: Mao Lu , Zhang Yu , Hu Yating , Ho Kuan Hung , Ke Qingqing , Liu Huajun , Hu Zhigang , Zhao Dan , Wang John
Published: January 2015

Mesoporous carbons were prepared from carbon spheres derived from hydrothermal carbonization of sucrose, followed by KOH activation. Good electrochemical performance was achieved in both aqueous and organic electrolytes.
Angstrom-scale vanadium carbide rods as Pt electrocatalyst support for efficient methanol oxidation reaction
Authors: Yan Zaoxue , Gao Lina , Zhang Mingmei , Xie Jimin , Chen Min
Published: January 2015

Angstrom-scale vanadium carbide rods greatly increase the Pt electrocatalyst activity for methanol oxidation.
Removal of As(iii) from water using modified jute fibres as a hybrid adsorbent
Authors: Hao Linlin , Zheng Tong , Jiang Jiping , Hu Qi , Li Xilan , Wang Peng
Published: January 2015

Jute fibres were modified to produce an effective hybrid adsorbent with the advantages of an excellent arsenic removal effect and easy retrieval from rivers or lakes.
Improved thermal dehydrogenation of ammonia borane by MOF-5
Authors: Li Zhongyue , Liu Wei , Yang Huijuan , Sun Tai , Liu Kun , Wang Zhenhui , Niu Chao
Published: January 2015

TPD-MS spectra (left) and solid-state 11B NMR (right) of pristine AB, AB/MOF-5 and AB/JUC-32-Y.
Trap induced tunable unusual dielectric properties in transition metal doped reduced graphene oxide
Authors: Akhtar Abu Jahid , Gupta Abhisek , Saha Shyamal K.
Published: January 2015

Giant value of permittivity (ε ∼ 2214) and remarkably high magneto-dielectric effect (23%) are observed in nickel doped reduced graphene oxide (RGO).
Exfoliated graphite as a filler to improve poly(phenylene sulfide) electrical conductivity and mechanical properties
Authors: Zhang Maliang , Wang Haixia , Li Zhenhuan , Cheng Bowen
Published: January 2015

Electrical conductive poly(phenylene sulfide) (PPS)/exfoliated graphite (EG) composites were prepared by a 1-chlornaphthalene blending method, and the interface effects of EG and PPS on PPS/EG properties were characterized.
Synthesis of dual type Fe species supported mesostructured silica nanoparticles: synergistical effects in photocatalytic activity
Authors: Jusoh R. , Jalil A. A. , Triwahyono S. , Kamarudin N. H. N.
Published: January 2015

Dual type Fe species (isomorphously substituted Fe species and a colloidal α-FeOOH (IS-FeOOH)) supported on mesostructured silica nanoparticles (IS-FeOOH/MSN) were prepared by a simple electrochemical method followed by impregnation.
A modular approach to self-oscillating polymer systems driven by the Belousov–Zhabotinsky reaction
Authors: Zhou Hongwei , Zheng Zhaohui , Wang Qiguan , Xu Guohe , Li Jie , Ding Xiaobin
Published: January 2015

This review explores the principle, modular construction, integral control and engineering aspects of self-oscillating polymer systems driven by the Belousov–Zhabotinsky reaction.
Acid induced fluorinated graphene oxide
Authors: Yang Xuming , Jia Xinnan , Ji Xiaobo
Published: January 2015

Brown graphene oxide was interestingly tuned into nearly white fluorinated graphene oxide with rich oxygen groups under hydrothermal treatment with nitric and hydrofluoric acid.
Synthesis of a phosphinated tetracyanate ester and its miscible blend with 4,4′-oxydianiline/phenol-based benzoxazine
Authors: Lin Ching Hsuan , Wang Meng Wei , Chou Yu Wei , Chang Hou Chien , Juang Tzong Yuan , Su Wen Chiung
Published: January 2015

A phosphinated tetracyanate ester (4) was prepared and applied to copolymerize with a 4,4′-oxydianiline/phenol-based benzoxazine (P-oda) to enhance the properties of P-oda thermoset.
Pickering emulsions stabilized by palygorskite particles grafted with pH-responsive polymer brushes
Authors: Lu Jia , Zhou Wei , Chen Jing , Jin Yeling , Walters Keisha B. , Ding Shijie
Published: January 2015

The reversibility of emulsions stabilized by PAL–PDEAEMA particles switched by pH can last at least seven successive cycles.
Well dispersed silicon nanospheres synthesized by RF thermal plasma treatment and their high thermal conductivity and dielectric constant in polymer nanocomposites
Authors: Hou Guolin , Cheng Benli , Ding Fei , Yao Mingshui , Cao Yuebin , Hu Peng , Ma Ruixin , Yuan Fangli
Published: January 2015

Nanocomposites with high thermal conductivity and large dielectric constant incorporated with Si nanospheres prepared by thermal plasma are reported.
Temperature stress on a thin film transistor with a novel BaZnSnO semiconductor using a solution process
Authors: Li Jun , Huang Chuan-Xin , Zhang Jian-Hua , Zhu Wen-Qing , Jiang Xue-Yin , Zhang Zhi-Lin
Published: January 2015

This work reports the temperature stress on a thin film transistor based on a novel BaZnSnO semiconductor using a solution process.
Novel hybrid PVA–InZnO transparent thin films and sandwich capacitor structure by dip coating method: preparation and characterizations
Authors: Sugumaran Sathish , Bellan Chandar Shekar , Muthu Dinesh , Raja Sengodan , Bheeman Dinesh , Rajamani Ranjithkumar
Published: January 2015

In this paper, a very simple and cost effective dip coating method to obtain novel hybrid PVA–InZnO transparent thin films and sandwich capacitor structures for future transparent device applications.
Metal-free synthesis of imidazopyridine from nitroalkene and 2-aminopyridine in the presence of a catalytic amount of iodine and aqueous hydrogen peroxide
Authors: Tachikawa Yuma , Nagasawa Yoshitomo , Furuhashi Sohei , Cui Lei , Yamaguchi Eiji , Tada Norihiro , Miura Tsuyoshi , Itoh Akichika
Published: January 2015

We have developed a metal-free synthetic method for 3-nitroimidazo[1,2-a]pyridines from nitroalkenes and 2-aminopyridines using catalytic amounts of iodine and aqueous hydrogen peroxide as a terminal oxidant.
2-Amino-1-methyl-6-phenylimidazo[4,5-b]pyridine (PhIP) formation and fate: an example of the coordinate contribution of lipid oxidation and Maillard reaction to the production and elimination of processing-related food toxicants
Authors: Zamora Rosario , Hidalgo Francisco J.
Published: January 2015

Major chemical reactions dealing with carbonyl chemistry in foods (Maillard reaction and lipid oxidation) play a role in PhIP formation and fate, pointing to this and analogous heterocyclic aromatic amines as outcomes of this chemistry.
Preparation of N-doped carbon quantum dots for highly sensitive detection of dopamine by an electrochemical method
Authors: Jiang Guohua , Jiang Tengteng , Zhou Huijie , Yao Juming , Kong Xiangdong
Published: January 2015

The glass carbon electrode modified by N-doped carbon quantum dots (NCQD) (NCQD/GCE) has been used to detect dopamine (DA) with broad linear range and low detection limit.
Beyond problem-based learning: using dynamic PBL in chemistry
Authors: Overton Tina L. , Randles Christopher A.
Published: January 2015

This paper describes the development and implementation of a novel pedagogy, dynamic problem-based learning. The pedagogy utilises real-world problems that evolve throughout the problem-based learning activity and provide students with choice and different data sets. This new dynamic problem-based learning approach was utilised to teach sustainable development to first year chemistry undergraduates. Results indicate that the resources described here motivated students to learn about sustainability and successfully developed a range of transferable skills.
Cu-catalyzed transannulation reaction of pyridotriazoles with terminal alkynes under aerobic conditions: efficient synthesis of indolizines
Authors: Helan V. , Gulevich A. V. , Gevorgyan V.
Published: January 2015

A Cu(i)-catalyzed denitrogenative transannulation reaction of pyridotriazoles with terminal alkynes en route to indolizines was developed.
Efficient hydrogen production from formic acid using TiO2-supported AgPd@Pd nanocatalysts
Authors: Hattori Masashi , Einaga Hisahiro , Daio Takeshi , Tsuji Masaharu
Published: January 2015

AgPd@Pd core–shell nanocatalysts loaded on TiO2 nanoparticles were fabricated using a two-step microwave–polyol method for efficient hydrogen production from decomposition of formic acid.
Molecular recognition directed supramolecular control over perylene-bisimide aggregation resulting in aggregation induced enhanced emission (AIEE) and induced chiral amplification
Authors: Roy Bappaditya , Noguchi Takao , Tsuchiya Youichi , Yoshihara Daisuke , Yamamoto Tatsuhiro , Shinkai Seiji
Published: January 2015

Achiral functional perylene recognizes only dibenzoyl tartaric acid (d/l) among others by expressing different self-assembled structures, and the selectivity is further transferred to chiral amplification in an enantiomeric excess experiment.
Coordinated beamforming schemes based on modified signal‐to‐leakage‐plus‐noise ratio precoding designs
Authors: Patcharamaneepakorn Piya , Armour Simon , Doufexi Angela
Published: January 2015

In this study, linear transceiver designs are proposed based on modified definitions of signal‐to‐leakage‐plus‐noise ratio (mSLNR) for multi‐cell coordinated beamforming scenarios. Two mSLNR definitions are presented, one of which modifies the computation of leakage and noise powers, while the other applies the modified procedure to the desired power calculation in addition to the computation of leakage and noise powers. The proposed mSLNRs are generally valid for any receiver types. Various linear receivers are studied, several of which, when applied with the first mSLNR definition, are shown to be equivalent. Moreover, a special case of the proposed scheme is shown to be equivalent to an existing algorithm. Iterative precoding algorithms are also presented with a discussion on their convergence properties. The proposed transceiver designs are further extended to incorporate scheduling functionalities. A weighted sum rate maximisation problem is formulated and is solved by two separate approaches, namely power allocation and data‐substream selection methods. Simulation results show that, for multiple users per cell, the proposed algorithms can effectively integrate user and substream selections and achieve multi‐user diversity gain.
Capacity of channel with energy harvesting transmitter
Authors: Bafghi Hamid Ghanizade , Seyfe Babak , Mirmohseni Mahtab , Aref Mohammad Reza
Published: January 2015

The authors propose a new technique to model the arriving energy's knowledge (AEK) in the energy harvesting (EH) communication systems. They consider a batteryless EH transmitter with the AEK non‐causally provided to it. They show that the capacity of the authors' model in general case, that is, discrete memoryless channel, can be derived through a binning scheme. This resembles a Gelfand–Pinsker type capacity formula which intuitively is the result of treating the energy as a channel state. Moreover, they investigate two especial cases of binary and Gaussian channels with the EH transmitters. In the binary symmetric channel with EH transmitter (BSCEH), their coding scheme leads to achieve the capacity of the classic binary symmetric channel (BSC). In the batteryless Gaussian channel with EH transmitter, the upper bound on the capacity is derived, and it is shown this bound is less than the capacity of the EH Gaussian channel with infinite battery.
Modem based on sphere packing techniques in high‐dimensional Euclidian sub‐space for efficient data over voice communication through mobile voice channels
Authors: Kazemi Reza , Boloursaz Mashhadi Mahdi , Heidari Khoozani Mohsen , Behnia Fereydoon
Published: January 2015

The increased penetration of cellular networks has made voice channels widely available ubiquitously. On the other hand, mobile voice channels possess properties that make them an ideal choice for high priority, low‐rate real‐time communications. Mobile voice channel with the mentioned properties, could be utilised in emergency applications in vehicular communications area such as the standardised emergency call system planned to be launched in 2015. This study aims to investigate the challenges of data transmission through these channels and proposes an efficient data transfer structure. To this end, a proper statistical model for the channel distortion is proposed and an optimum detector is derived considering the proposed channel model. Optimum symbols are also designed according to the derived rule and analytical bounds on error probability are obtained for the orthogonal signaling and sphere packing techniques. Moreover, analytical evaluation is performed and appropriate simulation results are presented. Finally, it is observed that the proposed structure based on the sphere packing technique achieves superior performance compared with prior works in this field. Although the ideas offered in this study are utilised to cope with voice channel non‐idealities, the steps taken in this study could also be applied to channels with similar conditions.
Precoding methods for multi‐input multi‐ouput interference channels with channel covariance Feedback
Authors: Zhou Wen
Published: January 2015

Usually, instantaneous channel information is required by the transmitter for the precoding in multi‐input multi‐output interference channels. In the case of fast fading channels, the resultant additional overhead of the system will be high. Against this, this study considers the scenario where the channel is spatially correlated and the transmitter only has the covariance information of the channel so that the system overhead can be reduced. On the basis of maximum signal‐to‐interference‐plus‐noise ratio (SINR) criterion, the author proposes two precoding methods, including the iterative precoding and bisection search precoding methods. The first method solves the optimal precoder of a given user provided that others' precoders are known, so that the SINR can be increased gradually. Whereas the second method introduces an auxiliary variable, transforms the original non‐convex problem into a convex one, and solves it by convex optimisation softwares. Both the proposed methods are proved to be convergent and their computation complexity and overheads are also analysed. Under various system settings, the proposed two methods are compared with a few existing precoding or joint transceiver methods by numerical method and computer simulation, and the superiority of the proposed methods is also shown in most cases.
FTIR/PCA study of propanol in argon matrix: The initial stage of clustering and conformational transitions
Authors: Doroshenko Iryna , Balevicius Vytautas , Pitsevich George , Aidas Kestutis , Sablinskas Valdas , Pogorelov Valeriy
Published: January 2015

FTIR spectra of 1-propanol in an argon matrix were studied in the range 11–30 K. Principal component analysis of dynamic FTIR spectra and nonlinear band shape fitting has been carried out. The peaks of monomer, open dimer, mixed propanol-water dimer and those of higher H-bond clusters have been resolved and analyzed. The attribution of certain FTIR peaks has been supported by proper density functional theory calculations. Analyzing dependences of the integral band intensities of various aggregates on temperature it has been deduced that in the initial stage of clustering monomers and dimers are the basic building blocks forming higher H-bond clusters. The peaks assigned to two conformers of monomers and mixed propanol-water dimers were investigated processing the temperature dependences of their integral intensities in Arrhenius plot. The obtained values of 0.18 kJ·mol−1 for propanol monomer and 0.26 kJ·mol−1 for mixed dimer are well comparable with the energy differences between the global minimum conformation of 1-propanol (Gt) and some other energetically higher structures (Tt or Tg).
Electron transport and stability of the oxygen subsystem of YBa2Cu3O7−δ single crystals upon prolonged exposure to air
Authors: Khadzhai G. Ya. , Vovk R. V.
Published: January 2015

Conductivity in the basal ab-plane of optimally oxygen-doped YBa2Cu3O7−δ single crystals was investigated before and after a prolonged exposure to air. The prolonged exposure was shown to increase the number of effective scattering centers for normal carriers. The excess conductivity for the samples studied was found to be an exponential function of temperature in a wide temperature range, while near the critical temperature Tc it is satisfactorily described by the Aslamazov–Larkin model. It was found that a prolonged exposure to air results in a considerable extension of the temperature range in which the pseudogap state is realized and a narrowing of the linear part of the ρab(T) dependence.
IR spectroscopy of the low-frequency phonon spectrum of the TbFe3(BO3)4 single-crystal
Authors: Kurnosov V. S. , Tsapenko V. V. , Bezmaternykh L. N. , Gudim I. A.
Published: January 2015

A study of the IR reflectance spectra of the TbFe3(BO3)4 crystal. We determined the frequencies of the polar lattice phonons in the high-temperature R32, and low- temperature P3121, phases. All 8A2 ⊕ 11E-modes were found in the high-temperature phase, with nine of them corresponding to lines of the absorption spectrum. In the low-temperature phase, of the 20A2 ⊕ 35E-modes allowed by the symmetry of the crystal lattice, 20A2 ⊕ 25E-modes were found.
Pressure effects on the relaxation of an excited nitromethane molecule in an argon bath
Authors: Rivera-Rivera Luis A. , Wagner Albert F. , Sewell Thomas D. , Thompson Donald L.
Published: January 2015

Classical molecular dynamics simulations were performed to study the relaxation of nitromethane in an Ar bath (of 1000 atoms) at 300 K and pressures 10, 50, 75, 100, 125, 150, 300, and 400 atm. The molecule was instantaneously excited by statistically distributing 50 kcal/mol among the internal degrees of freedom. At each pressure, 1000 trajectories were integrated for 1000 ps, except for 10 atm, for which the integration time was 5000 ps. The computed ensemble-averaged rotational energy decay is ∼100 times faster than the vibrational energy decay. Both rotational and vibrational decay curves can be satisfactorily fit with the Lendvay-Schatz function, which involves two parameters: one for the initial rate and one for the curvature of the decay curve. The decay curves for all pressures exhibit positive curvature implying the rate slows as the molecule loses energy. The initial rotational relaxation rate is directly proportional to density over the interval of simulated densities, but the initial vibrational relaxation rate decreases with increasing density relative to the extrapolation of the limiting low-pressure proportionality to density. The initial vibrational relaxation rate and curvature are fit as functions of density. For the initial vibrational relaxation rate, the functional form of the fit arises from a combinatorial model for the frequency of nitromethane “simultaneously” colliding with multiple Ar atoms. Roll-off of the initial rate from its low-density extrapolation occurs because the cross section for collision events with L Ar atoms increases with L more slowly than L times the cross section for collision events with one Ar atom. The resulting density-dependent functions of the initial rate and curvature represent, reasonably well, all the vibrational decay curves except at the lowest density for which the functions overestimate the rate of decay. The decay over all gas phase densities is predicted by extrapolating the fits to condensed-phase densities.
Asymmetric coupling and dispersion of surface-plasmon-polariton waves on a periodically patterned anisotropic metal film
Authors: Dutta Jhuma , Ramakrishna S. Anantha , Lakhtakia Akhlesh
Published: January 2015

The morphology of a columnar thin film (CTF) of silver renders it an effectively biaxially anisotropic continuum. CTFs of silver deposited on one-dimensional gratings of photoresist showed strong blazing action and asymmetrically coupled optical radiation to surface-plasmon-polariton (SPP) waves propagating only along one direction supported by either the CTF/photoresist or the CTF/air interfaces. Homogenization of the CTFs using the Bruggeman formalism revealed them to display hyperbolic dispersion, and the dispersion of SPP waves was adequately described thereby.