bluuebunny/crossref_metadata_2025_split huggingface dataset:
Direct View on Nanoionic Proton Mobility
Authors: Chan Wing K. , Haverkate Lucas A. , Borghols Wouter J. H. , Wagemaker Marnix , Picken Stephen J. , van Eck Ernst R. H. , Kentgens Arno P. M. , Johnson Mark R. , Kearley Gordon J. , Mulder Fokko M. 
Published: March 2011

AbstractThe field of nanoionics is of great importance for the development of superior materials for devices that rely on the transport of charged ions, like fuel cells, batteries, and sensors. Often nanostructuring leads to enhanced ionic mobilities due to the induced space‐charge effects. Here these large space‐charge effects occurring in composites of the proton‐donating solid acid CsHSO4 and the proton‐accepting TiO2 or SiO2 are studied. CsHSO4 is chosen for this study because it can operate effectively as a fuel‐cell electrolyte at elevated temperature while its low‐temperature conductivity is increased upon nano­structuring. The composites have a negative enthalpy of formation for defects involving the transfer of protons from the acid to the acceptor. Very high defect densities of up to 10% of the available sites are observed by neutron diffraction. The effect on the mobility of the protons is observed directly using quasielastic neutron scattering and nuclear magnetic resonance spectroscopy. Surprisingly large fractions of up to 25% of the hydrogen ions show orders‐of‐magnitude enhanced mobility in the nanostructured composites of TiO2 or SiO2, both in crystalline CsHSO4 and an amorphous fraction.
Protein‐Enabled Layer‐by‐Layer Syntheses of Aligned, Porous‐Wall, High‐Aspect‐Ratio TiO2 Nanotube Arrays
Authors: Berrigan John D. , Kang Tae‐Sik , Cai Ye , Deneault James R. , Durstock Michael F. , Sandhage Kenneth H. 
Published: March 2011

AbstractAn aqueous, protein‐enabled (biomimetic), layer‐by‐layer titania deposition process is developed, for the first time, to convert aligned‐nanochannel templates into high‐aspect‐ratio, aligned nanotube arrays with thin (34 nm) walls composed of co‐continuous networks of pores and titania nanocrystals (15 nm ave. size). Alumina templates with aligned open nanochannels are exposed in an alternating fashion to aqueous protamine‐bearing and titania precursor‐bearing (Ti(IV) bis‐ammonium‐lactato‐dihydroxide, TiBALDH) solutions. The ability of protamine to bind to alumina and titania, and to induce the formation of a Ti–O‐bearing coating upon exposure to the TiBALDH precursor, enables the layer‐by‐layer deposition of a conformal protamine/Ti–O‐bearing coating on the nanochannel surfaces within the porous alumina template. Subsequent protamine pyrolysis yields coatings composed of co‐continuous networks of pores and titania nanoparticles. Selective dissolution of the underlying alumina template through the porous coating then yields freestanding, aligned, porous‐wall titania nanotube arrays. The interconnected pores within the nanotube walls allow enhanced loading of functional molecules (such as a Ru‐based N719 dye), whereas the interconnected titania nanoparticles enable the high‐aspect‐ratio, aligned nanotube arrays to be used as electrodes (as demonstrated for dye‐sensitized solar cells with power conversion efficiencies of 5.2 ± 0.4%).
Nonbuoyancy density‐driven convective mass and heat transfer: Scaling analysis and solution methodology
Authors: Krantz William B. , Lee Hanyong , Chaudhuri Siladitya Ray , Hwang Sun‐Tak 
Published: March 2011

AbstractDensity change during mass or heat transfer can cause convection in the absence of buoyancy forces. Prior studies have shown that this convection can be significant in the determination of diffusion coefficients and in the casting of polymeric membranes. Including this effect is challenging even for advanced numerical codes. A general methodology for obtaining the mass‐average velocity for unsteady‐state, one‐dimensional, multicomponent mass and/or heat transfer circumvents the problem of numerically solving the coupled continuity equation. Scaling analysis permits assessing the importance of this convection for a generic equation‐of‐state. Numerical predictions for evaporation from a liquid layer for components having density ratios of 1:1 and 0.7:1 indicate that ignoring convection results in errors of 34% and 24% in the evaporation time and final thickness, respectively. This convection also influences the evaporation in the percutaneous application of cosmetics, medications, and insecticides, curing of paints, varnishes, and lacquers, and formation of thin films. © 2011 American Institute of Chemical Engineers AIChE J, 2012
Do rhesus monkeys recognize themselves in mirrors?
Authors: Anderson James R. , Gallup Gordon G. 
Published: March 2011

AbstractSelf‐recognition continues to attract attention because of the evidence of a striking difference between the great apes and humans, on the one hand, and all other primates; the former are capable of self‐recognition, whereas no compelling evidence exists for prosimians, monkeys, or lesser apes. This is in spite of numerous attempts to facilitate mirror self‐recognition in other primates. Although all previous attempts to find self‐recognition in rhesus macaques have failed, a recent article [Rajala et al., PLoS One 9:e12865, 2010] claimed the opposite—that adult male rhesus monkeys did recognize their own image in a mirror. We critically examine this claim, and conclude that the article fails to provide acceptable evidence for self‐recognition in rhesus monkeys. Am. J. Primatol. 73:603–606, 2011. © 2011 Wiley‐Liss, Inc.
Glänzende Aussichten für lumineszierende Siliciumdioxidnanopartikel
Authors: Bonacchi Sara , Genovese Damiano , Juris Riccardo , Montalti Marco , Prodi Luca , Rampazzo Enrico , Zaccheroni Nelsi 
Published: March 2011

AbstractSiliciumdioxidnanopartikel verfügen über besondere Eigenschaften, z. B. eine geringe Toxizität, und stellen eine vielseitige Plattform für die Nanotechnologie dar. Ein geeignetes Design oder eine geeignete Derivatisierung führen zu selbst unter physiologischen Bedingungen stabilen Kolloiden und ermöglichen verschiedenste Funktionen. Insbesondere bei der Wahl passender Farbstoffe und Synthesestrategien können sehr hell leuchtende Nanosysteme resultieren. So bieten Siliciumdioxidnanopartikel ein einzigartiges Potenzial, und weitere Verbesserungen könnten neue Anwendungen in Bereichen wie medizinischer Diagnose und Therapie, Umwelt‐ und Lebensmittelanalytik sowie Sicherheit bringen. Hier stellen wir Mehrkomponenten‐Nanosysteme auf Siliciumdioxidbasis vor, die zu gerichtetem Energie‐ und Elektronentransfer fähig sind und sich für Funktionen wie Lichtsammeln und Signalverstärkung eignen.
Luminescent Silica Nanoparticles: Extending the Frontiers of Brightness
Authors: Bonacchi Sara , Genovese Damiano , Juris Riccardo , Montalti Marco , Prodi Luca , Rampazzo Enrico , Zaccheroni Nelsi 
Published: March 2011

AbstractSilica nanoparticles are versatile platforms with many intrinsic features, such as low toxicity. Proper design and derivatization yields particularly stable colloids, even in physiological conditions, and provides them with multiple functions. A suitable choice of dyes and synthetic strategy may, in particular, yield a very bright nanosystem. Silica nanoparticles thus offer unique potential in the nanotechnology arena, and further improvement and optimization could substantially increase their application in fields of high social and economic impact, such as medical diagnostics and therapy, environmental and food analysis, and security. This paper describes silica‐based, multicomponent nanosystems with intrinsic directional energy‐ and electron‐transfer processes, on which highly valued functions like light harvesting and signal amplification are based.
Plantwide oscillations diagnosis—current state and future directions
Authors: Shoukat Choudhury M. A. A. 
Published: March 2011

AbstractThis paper describes the currently available techniques for root‐cause diagnosis of plantwide oscillation and future directions for research in this area. Plantwide oscillation arises mainly for three reasons: (1) tight controller tuning, (2) loop interactions and (3) presence of nonlinear faults such as valve stiction and sensor faults. Plantwide oscillation is detrimental for plant operation because it causes large variability in the control loops resulting in reduced profitability due to inferior quality products, larger rejection rates, reduction in average throughput and increase in energy requirements. Copyright © 2011 Curtin University of Technology and John Wiley & Sons, Ltd.
Hydroxyapatite (n‐HA)/unsaturated poly(ester‐amide) nanocomposites for bone fixation material
Authors: Ai Yong‐Ping , Zeng Ying‐Ying , Xie Shi‐Kun , Tang Fang‐Gen , He De‐Yong , Yi Rong‐Xi , Li Jiu‐Ming , Jiang Fen , Zhou Tai‐Ping 
Published: March 2011

AbstractA new type of unsaturated poly(ester‐amide) viz maleic anhydride‐phthalic anhydride‐ethylene glycol‐neopentylene glycol‐glycin copolymer was prepared by melt polycondensation. The copolymer was characterized by FT‐IR, gel permeation chromatography, and thermal gravimetric analysis. The molecular structure of crosslinked unsaturated poly(ester‐amide) was determined by wide‐angle X‐ray diffraction. Hydroxyapatite (n‐HA) was used to boost up the new unsaturated poly (ester‐amide), the flexural properties of n‐HA/unsaturated poly(ester‐amide) nanocomposites with different n‐HA content were measured. Studies of degradation behavior were carried out in simulated body fluid at pH 7.4 and 37°C, the flexural strength changes and cumulative mass loss of n‐HA/ unsaturated poly(ester‐amide) nanocomposites were measured at different degradation times. The n‐HA/unsaturated poly(ester‐amide) nanocomposites was hydrolyzed in 1M NaOH standard solution at room temperature to study the mass loss with different n‐HA contents. All the preliminary results suggested that n‐HA/unsaturated poly(ester‐amide) nanocomposites might be potentially used as a new type of bone fixation material. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011
Creep behavior of wood flour composites made from linseed oil‐based polyester thermosets
Authors: Mosiewicki Mirna A. , Marcovich Norma E. , Aranguren Mirta I. 
Published: March 2011

AbstractThe creep behavior of new polymers prepared by free radical polymerization of styrene‐crosslinked resins obtained from linseed oil and derived wood flour (WF) composites have been analyzed. Results of short‐time flexural creep tests at different temperatures are reported. The effects of the wood flour content and temperature are discussed. The creep deformation is significantly reduced with the incorporation of wood flour, due to the excellent fiber/matrix interaction. The creep strain was modeled using the creep power law and the Bürgers models. The parameters were determined from the best fitting of the experimental data using a nonlinear optimization method. Although both models gave a good description of the viscoelastic creep of the materials, the Bürgers model was preferred because of its ability to predict recovery. A master curve was built using the time temperature superposition principle, and the time shifts were well fitted using Arrhenius model. There was a good superposition of the short‐term master curve and long‐term data for samples tested at the same time after preparation. A reduction of the creep deformation was observed when the responses of samples tested after 2 and 5 years from preparation were compared, which was attributed to aging derived from the oxidative crosslinking of linseed oil fragments in the network. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011
Structure‐property and swelling behavior of electron beam irradiated poly(vinyl alcohol)/acrylamide/sodium montmorillonite clay composites
Authors: Abd Alla Saffa G. , Helal Reham H. , Wasfy Ashraf A. F. , El‐Naggar Abdel Wahab M. 
Published: March 2011

AbstractComposites based on poly(vinyl alcohol) (PVA), acrylamide monomer (AM) and sodium montmorillonite clay (MMT) were prepared, in the form of thin films, by solution casting. The PVA/AM/MMT composites films were then exposed to electron beam irradiation to form crosslinked network structure. The structure‐property behavior of PVA/AM/MMT hybrids was demonstrated by x‐ray diffraction (XRD), scanning electron microscopy, gel content, color intensity, thermogravimetric analysis (TGA) and swelling behavior in aqueous solutions. The results indicated that the introduction of MMT clay ratio up to 5% decreased the gel content of PVA/AM hydrogels. The color measurements indicated that the introduction of MMT clay ratio up to 5% was shown to affect the color intensity of composite films. It was found that both PVA/AM hydrogels and PVA/AM/MMT composites reached the equilibrium swelling state in water after four hours; however PVA/AM/MMT composites displayed higher swelling than PVA/AM hydrogels. However, the swelling of PVA/AM hydrogels or their composites at the equilibrium state increased with increasing temperature up to 60°C. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011
Design, Synthesis and Evaluation of Novel Rhodanine‐containing Sorafenib Analogs as Potential Antitumor Agents
Authors: Li Wei , Zhai Xin , Zhong Zheng , Li Guangyue , Pu Yongxiao , Gong Ping 
Published: March 2011

AbstractA series of rhodanine‐containing sorafenib analogs was designed, synthesized and evaluated for theirin‐vitroantitumor activity against three cancer cell lines (A549, H460 and HT29). Pharmacological data indicated that some of the target compounds possessed marked antiproliferative activity superior to the reference drug sorafenib, especially the most promising compound7r(with the IC50value of 0.8, 1.3 and 2.8 µM against A549, H460 and HT29 cell lines, respectively). The activity was found to strongly depend on the substitution pattern of the rhodanine motif at C‐5″ position. Results suggested that this series of compounds could serve as the bases for the development of novel antitumor agents.
The role of feedback mechanisms in biological network models—A tutorial
Authors: Radde Nicole 
Published: March 2011

AbstractFeedback circuits are network motifs that are important for the proper regulation of various cellular processes. Moreover, feedback is related to complex dynamic behavior such as bistability, hysteresis or oscillations, which has been investigated, especially in the context of intracellular networks, in recent years. Consequently, it is convenient to analyze the behavior of biological networks in terms of their feedback structure. While single feedback circuits are well‐investigated, a generalization of results to more complex networks is usually not straightforward. On the other hand, various results indicate that network complexity is directly connected to a proper functioning of the cell. Thus, theoretical approaches for the analysis of complex feedback systems are needed in order to understand cellular behavior at a systemic level. This work discusses the role of feedback mechanisms for intracellular regulation processes on different biological examples. We will recapitulate results for single elementary circuits and discuss recent attempts to develop a comprehensive theory that is also applicable for more complex networks of interrelated feedback structures. We will focus mainly on fixed point analysis and discuss concepts for a calculation of those in terms of the underlying graph topology.Copyright © 2011 John Wiley and Sons Asia Pte Ltd and Chinese Automatic Control Society
Practical Output Regulation of Uncertain Strict‐Feedback Form Systems
Authors: Montaseri Ghazal , Yazdanpanah Mohammad Javad 
Published: March 2011

AbstractIn this paper, an output feedback control is proposed to solve the practical output regulation problem of a class of nonlinear systems. In the first step of the design procedure, two sets of coordinate transformations are used to convert the output regulation problem of the system in the strict‐feedback form into the regulation problem of the transformed system in the uncertain normal form. Then, for the resulting system, a state feedback in the cast of nested sliding mode control is designed. Finally, by using the nonlinear separation principle, the output feedback controller is achieved by substituting the estimated states, resulting from the high‐gain observer, instead of real states. It can be shown that the states of the closed‐loop system are ultimately bounded.Copyright © 2011 John Wiley and Sons Asia Pte Ltd and Chinese Automatic Control Society
Invited review: Probing the structures of muscle regulatory proteins using small‐angle solution scattering
Authors: Lu Yanling , Jeffries Cy M. , Trewhella Jill 
Published: March 2011

AbstractSmall‐angle X‐ray and neutron scattering with contrast variation have made important contributions in advancing our understanding of muscle regulatory protein structures in the context of the dynamic molecular processes governing muscle action. The contributions of the scattering investigations have depended upon the results of key crystallographic, NMR, and electron microscopy experiments that have provided detailed structural information that has aided in the interpretation of the scattering data. This review will cover the advances made using small‐angle scattering techniques, in combination with the results from these complementary techniques, in probing the structures of troponin and myosin binding protein C. A focus of the troponin work has been to understand the isoform differences between the skeletal and cardiac isoforms of this major calcium receptor in muscle. In the case of myosin binding protein C, significant data are accumulating, indicating that this protein may act to modulate the primary calcium signals from troponin, and interest in its biological role has grown because of linkages between gene mutations in the cardiac isoform and serious heart disease. © 2011 Wiley Periodicals, Inc. Biopolymers 95: 505–516, 2011.
Identification of transcription factors perturbed by the synthesis of high levels of a foreign protein in yeast saccharomyces cerevisiae
Authors: Contador Carolina A. , Andrews Barbara A. , Liao James C. , Asenjo Juan A. 
Published: March 2011

AbstractFor years, micro‐organisms have been used for the industrial production of heterologous proteins. However, the production of foreign proteins causes undesirable problems for the host organism. The analysis of this phenomenon is desirable to improve the production of relevant proteins and so far no analysis of the effects of recombinant protein production on genetic regulation has been reported. In this work, network component analysis (NCA) was used to deduce transcription factor activities (TFAs) in a recombinant strain of Saccharomyces cerevisiae that produces a foreign protein, human superoxide dismutase (SOD) and compared the behavior of this yeast strain to the wild‐type host to see the effect of the expression of the protein at the regulatory level. NCA identified a network of 817 genes regulated by 87 transcription factors (TFs). From the identified TFs, 45 show significant change in their activities at least in one of the three phases of diauxic growth (glucose, ethanol, and early stationary phase). The major effect of the expression of SOD on the activity of the TFs was observed in the early stationary phase with 34 of them perturbed in comparison with 12 on glucose and 20 on ethanol. These TFs cover the main functions of the cell, such as developmental processes, cell cycle, metabolism, and environmental response. Five of them are present in all growth phases: Hal9, Mac1, Oaf3, Stp1, and Urc2. In addition, TFA analysis corroborates the hypothesis that copper plays a key role as a stress factor and suggests that YJL206C, a TF with unknown function, could be related to Ace2, a cell cycle regulator. © 2011 American Institute of Chemical Engineers Biotechnol. Prog., 2011
Superior thyroid artery origin in Caucasian Greeks: A new classification proposal and review of the literature
Authors: Natsis Konstantinos , Raikos Athanasios , Foundos Ioannis , Noussios George , Lazaridis Nikolaos , Njau Samouel N. 
Published: March 2011

AbstractStudies on the origin of the superior thyroid artery, define that it could originate either from the external carotid artery, (at the level of common carotid bifurcation), or from the common carotid artery. However, there is a classical anatomic knowledge that the superior thyroid artery is a branch of the external carotid artery. Variability in the anatomy of the superior thyroid artery was studied on 100 carotids. Moreover, a review about the origin of superior thyroid artery between recent and previous cadaveric, autopsy, and angiographic studies, on adults and fetuses, was carried out. The superior thyroid artery originated from the external carotid artery in 39% and at the level of carotid bifurcation and common carotid artery in 61% of cases. The anterior branches of the external carotid artery were separate in 76% of cases, while common trunks between the arteries were found in 24% of the specimens. A new classification proposal on the origin of the superior thyroid artery is also suggested. In this study, the origin of superior thyroid artery is considered at the level of the carotid bifurcation and not from the external carotid artery as stated in many classical anatomy textbooks. This has a great impact on the terminology when referring to the anterior branches of the external carotid artery, which could be termed as anterior branches of the cervical carotid artery. Head and neck surgeons must be familiar with anatomical variations of the superior thyroid artery in order to achieve a better surgical outcome. Clin. Anat. 24:699–705, 2011. © 2011 Wiley‐Liss, Inc.
ChemInform Abstract: HRTEM, SAED and XRD Investigations of La4O4[AsO4]Br and Pr4O4[AsO4]Br.
Authors: Ben Yahia Hamdi , Rodewald Ute Ch. , Boulahya Khalid , Gonzalez‐Calbet Jose Maria , Poettgen Rainer 
Published: March 2011

AbstractThe new title compounds are synthesized by solid state reaction of stoichiometric mixtures of La2O3 or Pr6O11, NH4H2AsO4, and NH4Br using NaBr as a flux (Pt tubes, 900 °C, 72 h).
ChemInform Abstract: Structure‐Composition‐Property Relationships of 6H‐BaTi1‐yCoyO3‐δ (0.1 ≤ y ≤ 0.4).
Authors: Miranda Laura , Boulahya Khalid , Hernando Maria , Sinclair Derek C. , Jimenez‐Villacorta Felix , Varela Aurea , Gonzalez‐Calbet Jose M. , Parras Marina 
Published: March 2011

AbstractThe title solid solutions are prepared from stoichiometric mixtures of BaCO3, TiO2, and Co3O4 (Pt crucible, 1648 K for 2 d (y = 0.1), 1473 K for 3 d (y = 0.2), 1373 K for 3 d (y = 0.3), 1398 K for 6 d (y = 0.4)).
ChemInform Abstract: Electrodes Modified with Multiwalled Carbon Nanotubes Carrying Fe3O4 Beads: High Sensitivity to H2O2.
Authors: Kang Shi‐Zhao , Chen Hong , Mu Jin 
Published: March 2011

AbstractIndium tin oxide electrodes modified with multiwalled carbon nanotubes carrying Fe3O4 beads are characterized by cyclic voltammetry.
ChemInform Abstract: Large‐Scale Synthesis of Ultrathin Hexagonal Tin Disulfide Nanosheets with Highly Reversible Lithium Storage.
Authors: Zhai Chuanxin , Du Ning , Zhang Hui , Yang Deren 
Published: March 2011

AbstractUltrathin (<5 nm thickness) hexagonal SnS2 nanosheets are hydrothermally synthesized from solutions of SnCl4 and thioacetamide in water (autoclave, 160 °C, 12 h).
ChemInform Abstract: A New Iron Oxyselenide Ce2O2FeSe2: Synthesis and Characterization.
Authors: McCabe Emma E. , Free David G. , Evans John S. O. 
Published: March 2011

AbstractThe title compound is prepared from stoichiometric mixtures of CeO2O, Se, and Fe powders using Al powder as an oxygen‐getter in a second crucible (two alumina crucibles in an evacuated quartz tube, 1050 °C, 12 h).
ChemInform Abstract: Development of a Mild Procedure for the Addition of Bisulfite to Electrophilic Olefins.
Authors: Fini Francesco , Nagabelli Murali , Adamo Mauro F. A. 
Published: March 2011

AbstractThe method proceeds at room temperature, affords only a slight excess of bisulfite, is catalyzed by a simple amine, and complemented by an easy purification procedure.