bluuebunny/crossref_metadata_2025_split huggingface dataset:
Integration of over 9,000 mass spectrometry experiments builds a global map of human protein complexes
Authors: Drew Kevin , Lee Chanjae , Huizar Ryan L , Tu Fan , Borgeson Blake , McWhite Claire D , Ma Yun , Wallingford John B , Marcotte Edward M 
Published: June 2017

AbstractMacromolecular protein complexes carry out many of the essential functions of cells, and many genetic diseases arise from disrupting the functions of such complexes. Currently, there is great interest in defining the complete set of human protein complexes, but recent published maps lack comprehensive coverage. Here, through the synthesis of over 9,000 published mass spectrometry experiments, we present hu.MAP, the most comprehensive and accurate human protein complex map to date, containing > 4,600 total complexes, > 7,700 proteins, and > 56,000 unique interactions, including thousands of confident protein interactions not identified by the original publications. hu.MAP accurately recapitulates known complexes withheld from the learning procedure, which was optimized with the aid of a new quantitative metric (k‐cliques) for comparing sets of sets. The vast majority of complexes in our map are significantly enriched with literature annotations, and the map overall shows improved coverage of many disease‐associated proteins, as we describe in detail for ciliopathies. Using hu.MAP, we predicted and experimentally validated candidate ciliopathy disease genes in vivo in a model vertebrate, discovering CCDC138, WDR90, and KIAA1328 to be new cilia basal body/centriolar satellite proteins, and identifying ANKRD55 as a novel member of the intraflagellar transport machinery. By offering significant improvements to the accuracy and coverage of human protein complexes, hu.MAP (http://proteincomplexes.org) serves as a valuable resource for better understanding the core cellular functions of human proteins and helping to determine mechanistic foundations of human disease.
Nanoporous Titanium Oxide Morphologies Produced by Anodizing of Titanium
Authors: Sklar G.P. , Singh H. , Mahajan V. , Gorhe D. , Namjoshi S.A. , LaCombe J.C. 
Published: June 2017

AbstractA quick and dependable technique has been developed that allows us to selectively produce anodized TiO2 in the form of nanotubes. The process employs mild chemical conditions and ambient temperature. The method can consistently produce nearly 100% surface coverage of nanotubes within 10 min of anodizing. Anodizing in relatively high pH electrolytes for 1 hour permitted us to produce nanotubes of 2μm length. We attribute the repeatability of our results to a brief pre-anodizing etching step that consistently leads to excellent anodizing results. Without this etching step, we experienced very poor consistency in that only small patches of titania nanotubes were formed.
Atomic Layer Deposition for the Conformal Coating of Nanoporous Materials
Authors: Elam Jeffrey W. , Xiong Guang , Han Catherine Y. , Wang H. Hau , Birrell James P. , Hryn John N. , Pellin Michael J. , Poco John F. , Satcher Joe H. 
Published: June 2017

AbstractAtomic layer deposition (ALD) is ideal for applying precise, conformal coatings over nanoporous materials. We have recently used ALD to coat two nanoporous solids: anodic aluminum oxide (AAO) and silica aerogels. AAO possesses hexagonally ordered pores with diameters d∼10 nm and thicknesses L∼70 microns. The AAO membranes were coated by ALD with successive layers of A1203, TiO2 and V2O5 to fabricate catalytic membranes. SEM, TEM and EDAX analysis of the membranes demonstrate that the ALD layers uniformly coat the extremely high aspect ratio (L/d∼104) AAO pores. These catalytic membranes show remarkable selectivity in the oxidative dehydrogenation of cyclohexane. Additional AAO membranes coated with ALD Pd films show promise as hydrogen sensors. Silica aerogels have the lowest density and highest surface area of any solid material. Consequently, these materials serve as an excellent substrate to fabricate novel catalytic materials and gas sensors by ALD. In this study, both thin film and monolithic aerogels were coated by ZnO ALD and the properties of the aerogels were investigated as a function of the coating thickness.
Solidified Fillings of Nanopores
Authors: Huber Patrick , Knorr Klaus 
Published: June 2017

AbstractWe present a selection of x-ray diffraction patterns of spherical (He, Ar), dumbbell- (N2, CO), and chain-like molecules (n-C9H20, n-C19H40) solidified in nanopores of silica glass (mean pore diameter 7nm). These patterns allow us to demonstrate how key principles governing crystallization have to be adapted in order to accomplish solidification in restricted geometries. 4He, Ar, and the spherical close packed phases of CO and N2 adjust to the pore geometry by introducing a sizeable amount of stacking faults. For the pore solidified, medium-length chainlike n-C19H40 we observe a close packed structure without lamellar ordering, whereas for the short-chain C9H20 the layering principle survives, albeit in a modified fashion compared to the bulk phase.
Preparation and Characterization of Fibrous Cerium Oxide Templated from Activated Carbon Fibers
Authors: Crocker Mark , Graham Uschi M. , Gonzalez Rolando , Morris Erin , Jacobs Gary , Andrews Rodney 
Published: June 2017

AbstractHigh surface area cerium oxide has been prepared using a carbon templating method. Impregnation of a highly mesoporous activated carbon (Darco KB-B) with an aqueous solution of cerium nitrate, followed by carbon burn off, afforded ceria with surface area of up to 148 m2/g. According to thermogravimetric studies, ceria formation proceeds via decomposition of cerium nitrate at ca. 410 K; oxidation of the carbon template commences at the same temperature, being facilitated by the release of NO2 from the Ce compound. Use of activated carbon fibers (ACFs) as template was found to provide a simple route to fibrous cerium oxide. The lower surface areas (3 - 59 m2/g) of the resulting ceria fibers reflect the largely microporous nature of the ACFs; evidently the Ce nitrate solution is unable to penetrate their micropores. Consequently, the surface area of the ceria product is found to increase with increasing mesoporosity of the ACF template. Electron microscopy reveals that the ceria fibers are composed of highly crystalline primary particles of 5-10 nm diameter; further, the fibers display a number of interesting morphological features at the macro- and nano-scales.
Surface Defect-mediated Reactivity of Au/TiO2(110)
Authors: Park Ken T. , Pan Minghu , Meunier Vincent , Shelton William , Kalinin Sergei , Baddorf Arthur P. , Plummer E.W. 
Published: June 2017

AbstractMetal clusters supported by transition metal oxides, as exemplified by the Au/TiO2 system, have found broad applications as catalytic and sensor materials. The unusual properties of these systems originate from the specific interactions of metal clusters mediated by an oxide substrate, including local reduction below the cluster. In this work, we present recent results on the local interactions between one-dimensional defects on a TiO2 surface and their reactivity with oxygen and Au nano-clusters studied by a combination of Scanning Tunneling Microscopy and Spectroscopy (STM/S). High-resolution STM images, interpreted with first-principles theory, show that the observed one-dimensional strands have partially reduced Ti atoms coordinated above three-coordinated, surface oxygen atoms. When strands are exposed to 5 x 10-7 Torr O2 at 300 K, oxygen is adsorbed and randomly nucleated on and along the strands. The results indicate the presence of exposed Ti that act as an active site for oxygen adsorption even at room temperature. Gold nano-particles of diameters 5 nm and less have also been deposited on the sub-stoichiometric rows of TiOx and characterized by STM. Like point defects and step edges on TiO2(110), the strands serve as nucleation sites for gold nano-clusters. The 1D defects of the surface are interpreted in terms of a surface crystallographic shear type structure, in contrast to the proposed Ti2O3 added row model by Onish and Iwasawa [Phys. Rev. Lett. 76, (1996) 791]. The implications of this behavior and specific interaction between gold clusters, defects and gas molecules for catalytic activity of the Au/TiO2 system are discussed.
Photocatalytic activities of layered intercalated materials H2NiTi4O10/TiO2 under UV and visible light irradiation
Authors: Wu Jihuai , Huang Yunfang , Li Taohai , Lin Jianming , Huang Miaoliang , Wei Yuelin 
Published: June 2017

AbstractH2NiTi4O10/TiO2 intercalated compound was fabricated by successive intercalation reactions of H2NiTi4O10 with n-C6H13NH2/C2H5OH mixed solution and acid TiO2 sol, followed by irradiating with a high-pressure mercury lamp. H2NiTi4O10, a layered perovskite type compound with TiO2-loading, exhibited a high activity for decomposition of methyl orange under UV and visible light irradiation. The experimental results showed that methyl orange was degraded with the decomposition ratio of 59.0 % by using H2NiTi4O10/TiO2 as photocatalyst under visible light ( > 420 nm) irradiation for 24 h. The H2NiTi4O10/TiO2 possessed higher photocatalytic activity than those commercial titania powder (Degussa P-25) which showed the decomposition ratio just only 24% under same condition.
Synthesis and Characterization of Photocatalytic TiO2-ZnFe2O4 Nanoparticles
Authors: Srinivasan Sesha S. , Wade Jeremy , Stefanakos Elias K. 
Published: June 2017

AbstractThe wide bandgap semiconductor TiO2 has become the dominant UV-activated photocatalyst in the field of air and water detoxification because of its high stability, low cost, high oxidation potential and chemically favorable properties. The demand for visible-light activated photocatalytic systems is increasing rapidly; however, currently, the efficiency and availability of photocatalysts that can be activated effectively by the solar spectrum and particularly indoor lighting is severely limited. In this paper, a new coprecipitation/hydrolysis synthesis route is used to create a TiO2-ZnFe2O4 nanocomposite that is directed towards extending the photoresponse of TiO2 from UV to visible wavelengths (>400nm). The effect of TiO2's accelerated anatase-rutile phase transformation due to the presence of the coupled ZnFe2O4 narrow bandgap semiconductor is evaluated. The transformation's dependence on pH, calcination temperature, particle size, and ZnFe2O4 concentration has been analyzed using XRD, SEM, and UV-Visible spectrometry. The requirements for retaining the highly photoactive anatase phase present in a ZnFe2O4 nanocomposite are outlined. The visible-light activated photocatalytic activity of the TiO2-ZnFe2O4 nanocomposites have been compared to an Aldrich TiO2 reference catalyst, using a solar-simulated photoreactor for the degradation of phenol.
Clays pillared by zirconia nanoparticles: structure, adsorption and catalytic properties
Authors: Sadykov Vladislav A. , Kuznetsova Tatyana G. , Bunina Rimma V. , Mezentseva Natalya V. , Efremov Dmitrii K. , Avdeev Vasilii I. , Doronin Vladimir P. , Kuznetsov Vladimir L. , Volodin Aleksander M. , Paukshtis Eugenii A. , Alikina Galina M. , Matyshak Valerii A. , Lunin Valerii V. 
Published: June 2017

AbstractModeling of high resolution nitrogen adsorption isotherms by the Grand Canonical Monte Carlo (GCMC) method for zirconia-pillared clays containing 20 wt.% of ZrO2 revealed that the pillars are comprised of separate Zr4(μ-OH)8(OH)m (H2O)n units (Zr4 tetramers) and their dimers (Zr8 complexes) as sheets or loose 3D structures. This agrees with the results of modeling of the condensation process in solution using the Density Functional Theory approach (DFT) and the semiempirical PM3 method. Bridging and terminal hydroxyls strongly bound with Zr cations are involved in anchoring supported Cu cations and Pt. This nanostructure of the active component as well as the developed micro- and mesoporosity appear to be responsible for the high performance of Pt+Cu/ZrPILC catalysts in the NOx selective reduction by propylene and decane in realistic feeds.
Interfacial Processes in Nanoporous Platinum: Double-Layer Charging Versus Chemisorption
Authors: Viswanath R.N. , Kramer D. , Rösner H. , Weissmüller J. 
Published: June 2017

AbstractWhen conductive solids with nanoscale porosity are immersed in electrolyte and biased against a suitable counter electrode, the surface is charged and the properties of the matter at the surface vary reversibly as the function of the bias voltage. Due to the immense surface area at nanoscale pore size, the local changes are reflected in the macroscopic materials properties. Specifically, changes in the superficial interatomic bonding lead to a stress and strain of the material, with strain amplitude and strain energy density of sufficient magnitude to suggest possible application as actuator materials. We discuss an experiment which provides an insight into the underlying microscopic processes at the metal electrolyte interface: are changes in the surface bonding in the metal dominant, or does the effect arise mainly from the formation of chemical bonds with adsorbates? We studied the variation of the surface stress charge coefficient of Pt in weakly adsorbing aqueous solutions of NaF of various concentrations. As the concentration is reduced, we find initially an increase in the magnitude of the surface stress-charge coefficient, followed by saturation at a value of -1.9V. Since specific adsorption is expected to be reduced as the solution become more diluted, in favor of the capacitive charging, the results support the notion that changes in the bonding between the metal atoms control the variation in the surface stress during double-layer charging.
Fabrication of transparent polymer-inorganic hybrid material
Authors: Li S. , Toprak M. S. , Jo Y. S , Kim D. K. , Muhammed M. 
Published: June 2017

AbstractPolymer-inorganic hybrid materials composed of polymethyl methacrylate (PMMA) and zinc compounds were prepared by sol-gel in-situ transition polymerization of zinc complex in PMMA matrix. Zinc acetate dihydrate dissolved in ethanol was used as the inorganic precursor. Monoethanolamine (MEA) acted as a complexing agent to control the hydrolysis of zinc acetate to produce a zinc compound network, and then PMMA, formed in-situ through a radical polymerization, were chemically bonded to the forming zinc compound network to realize a hybrid material. Transparent homogenous hybrid materials with slight colours from pink to yellow were fabricated by varying the composition. TEM, FT-IR were employed to investigate structural and physical properties. The UV-shielding effect was evaluated by UV-VIS. The low content of zinc (around 0.02 wt%) and the fine particle size rendered it visibly transparent and capable of greatly attenuating UV radiation in the full UV range.
A Study of the Structure of CeO2 Nanorods
Authors: Bugayeva Natalia 
Published: June 2017

AbstractHydrated CeOx2 nanoparticles of rod-like morphology have been obtained via a two-stage chemical precipitation method. The structure of the particles has been investigated using high resolution imaging techniques with a transmission electron microscope. The particles are found to exhibit five-fold symmetry and multiple twinning around {111} crystallographic planes. A structural model for the rod-like morphology is proposed. The mechanism of formation of such a structure is likely to depend on the unique chemistry of cerium and the preparation route.
Optical, Electrical and Switching Properties of Gadolinium - Gadolinium Hydride / Palladium Silver System
Authors: Schmitt H. , Shalaan E. 
Published: June 2017

AbstractGadolinium (Gd)- and gadolinium/magnesium (Gd/Mg)-films as well as top layers of catalytic films were prepared by rf-sputtering technique. To improve the optical properties, optical transparency, color and switching time, the Gd films were modified with Mg. By change of the sputtering parameters, the grain size of the Gd-films was varied in the range from 29 nm to 9.5 nm. To improve the catalytic properties, palladium-films (Pd) were modified with silver (Ag).To investigate the influence of the structure and the microstructure on the optical and the switching properties of the films, X-ray diffraction measurements and scanning electron microscope studies were performed.It is shown that the optical transmission of the GdH3 films can be improved by the modification of the gadolinium-films with magnesium. Further, a significant influence of the grain size is found. If the grains size of the films is reduced to 9.5 nm, the optical transmission of the films increases. The reduced grain size, leading to a larger inner surface, decreases the optical and the electrical switching time and the optical transmission. A reduction of the switching time is attained by the modification of the catalytic palladium films with silver.
Morphology, structure and optical properties of MOCVD grown pseudo-binary alloy nanowires of Zn1-xCdxSe on Si and GaAs substrates
Authors: Ng C. M. , Shan C. X. , Liu Z. , Hark S. K. 
Published: June 2017

AbstractLong and fine Zn1-xCdxSe pseudo-binary alloy nanowires of various compositions x covering the entire range were grown by metalorganic chemical vapor deposition, using diethlyzinc, dimethylcadmium and diisopropylselenide as precursors, on Si (100) and GaAs (100) substrates; sputtered gold was used as a catalyst to promote nanowire formation. By controlling the ratio of the flows of the precursors, the temperature and the pressure during growth, we obtained nanowires of desired compositions. The morphology, structure and optical properties of the nanowires were studied by various techniques, including secondary electron microscopy, atomic force microscopy, transmission electron microscopy, X-ray diffraction, photoluminescence, and Raman scattering. Depending on the substrate, composition and conditions of growth, either the zincblende or wurtzite nanowires were obtained. At compositions where the stable form would have been normally wurtzite, the zincblende form could be obtained under certain growth conditions. From the orientations of the ordered nanowires on the substrate surface, their directions of growth were deduced and confirmed by high resolution lattice imaging. The relationship between the band gap and the composition of the nanowires were measured and found to deviate from that of bulk alloys and epilayers. The interplay between the growth conditions and compositions and morphology of the nanowires are discussed.
Pioneering Development of Atomic Resolution In Situ Environmental Transmission Electron Microscopy for Probing Gas-Solid Reactions and In Situ Nanosynthesis
Authors: Gai Pratibha L. , Boyes Edward D. 
Published: June 2017

AbstractHighlights of our pioneering development of atomic resolution in situ environmental transmission electron microscope (ETEM) for direct probing of gas-solid reactions and in situ nanosynthesis are described. Dynamic studies on supported nanoparticle catalysts and carbon nanotubes under different reaction environments have been carried out. The results provide deep insights into the dynamic nanostructure of the materials and their mode of operation.
The Effect of Substrates / Ligands on Metal Nanocatalysts Investigated By Quantitative Z-Contrast Imaging and High Resolution Electron Microscopy
Authors: Xu Huiping , Menard Laurent , Frenkel Anatoly , Nuzzo Ralph , Johnson Duane , Yang Judith 
Published: June 2017

AbstractOur direct density function-based simulations of Ru-, Pt- and mixed Ru-Pt clusters on carbon-based supports reveal that substrates can mediate the PtRu5 particles [1]. Oblate structure of PtRu5 on C has been found [2]. Nevertheless, the cluster-substrate interface interactions are still unknown. In this work, we present the applications of combinations of quantitative z-contrast imaging and high resolution electron microscopy in investigating the effect of different substrates and ligand shells on metal particles. Specifically, we developed a relatively new and powerful method to determine numbers of atoms in a nanoparticle as well as three-dimensional structures of particles including size and shape of particles on the substrates by very high angle (~96mrad) annular dark-field (HAADF) imaging [2-4] techniques. Recently, we successfully synthesize icosahedra Au13 clusters with mixed ligands and cuboctahedral Au13 cores with thiol ligands, which have been shown by TEM to be of sub-nanometer size (0.84nm) and highly monodisperse narrow distribution. X-ray absorption and UV-visible spectra indicate many differences between icosahedra and cuboctahedral Au13 cores. Particles with different ligands show different emissions and higher quantum efficiency has been found in Au11 (PPH3) SC12)2C12. We plan to deposit those ligands-protected gold clusters onto different substrates, such as, TiO2 and graphite, etc. Aforementioned analysis procedure will be performed for those particles on the substrates and results will be correlated with that of our simulations and activity properties. This approach will lead to an understanding of the cluster-substrates relationship for consideration in real applications.
An Advanced Logarithmic Phase Mask for Extending Depth of Field of Hybrid Optical Systems
Authors: Nhu Le Van , Nhue Phan Nguyen , Hai Le Hoang 
Published: June 2017

In this paper, an advanced logarithmic phase mask is proposed and its performance is investigated. The essential performance characteristics of phase masks are shown, including the defocused modulation transfer functions (MTF), integral area of the MTF, Hilbert space angle, non-axial Strehl ratio, and decoded images. The results have demonstrated that our phase mask is highly beneficial to extend the depth of field of hybrid optical systems. The advantages of the proposed phase mask in	comparison to some other masks are also pointed out.
O número 120 na Bíblia Hebraica como um parâmetro para a medida de tempo
Authors: Hubner Manu Marcus 
Published: June 2017

Alguns números se destacam na Bíblia Hebraica pelo seu significado ou simbologia. O número cento e vinte é um deles. Além de suas qualidades matemáticas, o número cento e vinte possui qualidades simbólicas singulares. Esse número figura no Livro do Gênese como medida de tempo, no momento em que um limite de cento e vinte anos é decretado como expectativa máxima de vida do homem (Gn 6:3). Esse número também corresponde aos anos de vida do profeta Moisés (Dt 34:7). Além disso, o número cento e vinte está relacionado ao período de cento e vinte anos em que Noé construiu a arca para sobreviver ao dilúvio (Gn 6), aos cento e vinte dias em que Moisés esteve sobre o Monte Sinai em três períodos de quarenta dias cada, como também ao período de três gerações convencionais de quarenta anos cada, exemplificado pelo pacto de Deus com o povo de Israel: “...guardes todos os Seus estatutos e os Seus preceitos que eu te ordeno – tu, teu filho e o filho de teu filho...” (Dt 6:2). A Bíblia Hebraica pode, então, ser compreendida como um contrato entre Deus e o povo de Israel. Portanto, o teor simbólico do número cento e vinte se relaciona com sua subdivisão em três ciclos de quarenta anos cada, representado por uma instituição muito importante do mundo antigo: o contrato, que é celebrado entre três gerações convencionais, para as quais a Bíblia Hebraica atribui a extensão convencional de quarenta anos. E três gerações de quarenta anos representam exatamente cento e vinte anos. Além disso, é costume utilizarmos no hebraico moderno a expressão “‘aḏ mê-’āh wə-‘eś-rîm ”, desejando a alguém que viva até os cento e vinte anos, o que demonstra que o hebraico moderno está calcado em tradições antigas.