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  • 1
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    CRYSTAL STRUCTURE AND MAGNETIC PROPERTY OF SYNTHETIC GENGENBACHITE, KH8(Fe2.66Al0.34)(PO4)6{middle dot}6H2O (2013)
    Mineralogical Association of Canada
    Details
    Publication Date: 2013-06-12
    Description: Synthetic gengenbachite, KH 8 (Fe 2.66 Al 0.34 )(PO 4 ) 6 ·6H 2 O, has been prepared hydrothermally at 423–393 K. Single-crystal X-ray structure refinements ( R 1 = 0.035 for 1838 [ I 〉 2( I )] unique reflections and wR 2 = 0.083 for all 1863 reflections) confirm that gengenbachite crystallizes in the trigonal space group P 31 c (No. 159) and is isotypic with synthetic (NH 4 ) H 8 Fe 3+ 3 (PO 4 ) 6 ·6H 2 O. The crystal structure consists of [FeO 6 ] octahedra and [PO 4 ] tetrahedra forming a three-dimensional framework with eight-membered-ring channels running along the [100], [010], and [110] directions. All but one hydrogen atom have been located to allow description of the hydrogen bonds in gengenbachite. Magnetic susceptibility analysis of gengenbachite yielded the Curie constant C = 12.07 emu·K·mol –1 and the Weiss constant P = –58.9 K. The effective magnetic moment per Fe atom μ eff = 6.03 μ B provides further support for high-spin Fe 3+ in octahedral coordination.
    Print ISSN: 0008-4476
    Topics: Geosciences
    Published by Mineralogical Association of Canada
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  • 2
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    Numerical studies of independent control of electron density and gas temperature via nonlinear coupling in dual-frequency atmospheric pressure dielectric barrier discharge plasmas (2016)
    American Institute of Physics (AIP)
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    Publication Date: 2016-07-06
    Description: Dielectric barrier discharges (DBDs) provide a promising technology of generating non-equilibrium cold plasmas in atmospheric pressure gases. For both application-focused and fundamental studies, it is important to explore the strategy and the mechanism for enabling effective independent tuning of key plasma parameters in a DBD system. In this paper, we report numerical studies of effects of dual-frequency excitation on atmospheric DBDs, and modulation as well as separate tuning mechanism, with emphasis on dual-frequency coupling to the key plasma parameters and discharge evolution. With an appropriately applied low frequency to the original high frequency, the numerical calculation demonstrates that a strong nonlinear coupling between two frequencies governs the process of ionization and energy deposition into plasma, and thus raises the electron density significantly (e.g., three times in this case) in comparisons with a single frequency driven DBD system. Nevertheless, the gas temperature, which is mainly determined by the high frequency discharge, barely changes. This method then enables a possible approach of controlling both averaged electron density and gas temperature independently.
    Print ISSN: 1070-664X
    Electronic ISSN: 1089-7674
    Topics: Physics
    Published by American Institute of Physics (AIP)
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  • 3
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    High-resolution laser microwave double-resonance spectroscopy of hyperfine splitting of trapped ^{113}Cd^{+} and ^{111}Cd^{+} ions (2012)
    American Physical Society (APS)
    Details
    Publication Date: 2012-08-30
    Description: Author(s): J. W. Zhang, Z. B. Wang, S. G. Wang, K. Miao, B. Wang, and L. J. Wang The ground-state hyperfine splittings of laser-cooled 113 Cd + and 111 Cd + ions confined in a linear Paul trap have been measured to be 15 199 862 854.96(0.12) Hz and 14 530 507 349.9(1.1) Hz, respectively, using a microwave-optical double-resonance technique. The results for 113 Cd + agrees with previou... [Phys. Rev. A 86, 022523] Published Wed Aug 29, 2012
    Keywords: Atomic and molecular structure and dynamics
    Print ISSN: 1050-2947
    Electronic ISSN: 1094-1622
    Topics: Physics
    Published by American Physical Society (APS)
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  • 4
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    Survivin is essential for fertile egg production and female fertility in mice (2014)
    Springer Nature
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    Publication Date: 2014-03-28
    Description: Survivin is essential for fertile egg production and female fertility in mice Cell Death and Disease 5, e1154 (March 2014). doi:10.1038/cddis.2014.126 Authors: Z-Z Jiang, M-W Hu, Z-B Wang, L Huang, F Lin, S-T Qi, Y-C Ouyang, H-Y Fan, H Schatten, T W Mak & Q-Y Sun
    Keywords: folliculogenesisapoptosisgranulosa cellmeiosisoocyteSurvivin
    Electronic ISSN: 2041-4889
    Topics: Biology , Medicine
    Published by Springer Nature
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  • 5
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    Measurements of particle number size distributions and optical properties in urban Shanghai during 2010 World Expo: relation to air mass history (2014)
    Co-Action Publishing
    In: Tellus B
    Details
    Publication Date: 2014-10-30
    Description: To investigate the air quality during 2010 World Expo, continuous measurements of particle number size distributions and optical parameters were performed at urban Shanghai from April to June 2010. Total particle number and volume concentrations in the size range 16–600 nm were 12 700±6200 cm −3 and 16±8 µm 3 /cm 3 , respectively. Meanwhile, the optical parameters, particle light-scattering coefficient b sp,532nm and absorption coefficient b ap,532nm were 210±140 Mm −1 and 26±20 Mm −1 , respectively. Strong correlation ( R =0.69) was observed between b sp,532nm and the number concentration of accumulation mode particles, especially in the specific size range 300–500 nm ( R =0.87). Cluster analysis on air mass history was performed to explore the relationship between air mass origins and the optical as well as microphysical parameters. Back trajectories were classified into four major clusters. Air masses came from the west direction, in which continental aerosols were predominant, associating with the polluted cases during the summertime in Shanghai. In addition, the northern air mass showed the lower values of aerosol single scattering albedo ω 0,532nm , indicating the presence of smaller light-absorbing particles originated from the North China Plain. Keywords: particle number size distribution, aerosol optical properties, air mass history, cluster analysis, 2010 World Expo (Published: 29 October 2014) Citation: Tellus B 2014, 66 , 22319, http://dx.doi.org/10.3402/tellusb.v66.22319
    Print ISSN: 0280-6509
    Electronic ISSN: 1600-0889
    Topics: Geography , Physics
    Published by Co-Action Publishing on behalf of The International Meteorological Institute in Stockholm.
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  • 6
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    CeO2 nanocubes-graphene oxide as durable and highly active catalyst support for proton exchange membrane fuel cell (2014)
    Springer Nature
    Details
    Publication Date: 2014-12-11
    Description: Rapid degradation of cell performance still remains a significant challenge for proton exchange membrane fuel cell (PEMFC). In this work, we develop novel CeO2 nanocubes-graphene oxide nanocomposites as durable and highly active catalyst support for proton exchange membrane fuel cell. We show that the use of CeO2 as the radical scavenger in the catalysts remarkably improves the durability of the catalyst. The catalytic activity retention of Pt-graphene oxide-8 wt.% CeO2 nanocomposites reaches as high as 69% after 5000 CV-cycles at a high voltage range of 0.8–1.23 V, in contrast to 19% for that of the Pt-graphene oxide composites. The excellent durability of the Pt-CeO2 nanocubes-graphene oxide catalyst is attributed to the free radical scavenging activity of CeO2, which significantly slows down the chemical degradation of Nafion binder in catalytic layers, and then alleviates the decay of Pt catalysts, resulting in the excellent cycle life of Pt-CeO2-graphene oxide nanocomposite catalysts. Additionally, the performance of single cell assembled with Nafion 211 membrane and Pt-CeO2-graphene oxide catalysts with different CeO2 contents in the cathode as well as the Pt-C catalysts in the anode are also recorded and discussed in this study. Scientific Reports 4 doi: 10.1038/srep07415
    Electronic ISSN: 2045-2322
    Topics: Natural Sciences in General
    Published by Springer Nature
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  • 7
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    A positioning system for forest diseases and pests based on GIS and PTZ camera (2014)
    Institute of Physics (IOP)
    Details
    Publication Date: 2014-03-19
    Description: Forest diseases and pests cause enormous economic losses and ecological damage every year in China. To prevent and control forest diseases and pests, the key is to get accurate information timely. In order to improve monitoring coverage rate and economize on manpower, a cooperative investigation model for forest diseases and pests is put forward. It is composed of video positioning system and manual labor reconnaissance with mobile GIS embedded in PDA. Video system is used to scan the disaster area, and is particularly effective on where trees are withered. Forest diseases prevention and control workers can check disaster area with PDA system. To support this investigation model, we developed a positioning algorithm and a positioning system. The positioning algorithm is based on DEM and PTZ camera. Moreover, the algorithm accuracy is validated. The software consists of 3D GIS subsystem, 2D GIS subsystem, video control subsystem and disaster positioning subsystem. 3D GIS subsyste...
    Print ISSN: 1755-1307
    Electronic ISSN: 1755-1315
    Topics: Geography , Geosciences , Physics
    Published by Institute of Physics (IOP)
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  • 8
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    Nitriding iron at lower temperatures (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-02-01
    Description: The microstructure in the surface layer of a pure iron plate was refined at the nanometer scale by means of a surface mechanical attrition treatment that generates repetitive severe plastic deformation of the surface layer. The subsequent nitriding kinetics of the treated iron with the nanostructured surface layer were greatly enhanced, so that the nitriding temperature could be as low as 300 degrees C, which is much lower than conventional nitriding temperatures (above 500 degrees C). This enhanced processing method demonstrates the technological significance of nanomaterials in improving traditional processing techniques and provides a new approach for selective surface reactions in solids.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tong, W P -- Tao, N R -- Wang, Z B -- Lu, J -- Lu, K -- New York, N.Y. -- Science. 2003 Jan 31;299(5607):686-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12560546" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 9
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    Power loss of slipper/swashplate based on elastohydrodynamic Lubrication model in axial piston pump (2018)
    Institute of Physics (IOP)
    Details
    Publication Date: 2018-10-31
    Description: Energy saving of the hydraulic system is significantly realized by improving the efficiency of the pump. The slipper/swashplate lubricating surface is one of the main energy consumption parts in axial piston pump which is always used in the hydraulic system. Being a hydraulic bearing in axial piston pump, the slipper/swashplate pair exerts both the bearing function and the sealing function under the oscillating working condition. Because of viscous friction and leakage flow, power loss of slipper/swashplate is also one of the main power loss sources in axial piston pump. A precise model of lubricating surfaces, which includes oil film thickness, dynamic pressure field, load carrying ability and energy dissipation, is indispensable to develop more effective lubricating surface morphology. An elastohydrodynamic lubricating oil film model has been established for the sliding surfaces between slipper/swashplate interfaces. The model includes an isothermal fluid model, micro-motion o...
    Print ISSN: 1755-1307
    Electronic ISSN: 1755-1315
    Topics: Geography , Geosciences , Physics
    Published by Institute of Physics (IOP)
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  • 10
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    Chlorinated indium tin oxide electrodes with high work function for organic device compatibility (2011)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2011-04-16
    Description: In organic light-emitting diodes (OLEDs), a stack of multiple organic layers facilitates charge flow from the low work function [~4.7 electron volts (eV)] of the transparent electrode (tin-doped indium oxide, ITO) to the deep energy levels (~6 eV) of the active light-emitting organic materials. We demonstrate a chlorinated ITO transparent electrode with a work function of 〉6.1 eV that provides a direct match to the energy levels of the active light-emitting materials in state-of-the art OLEDs. A highly simplified green OLED with a maximum external quantum efficiency (EQE) of 54% and power efficiency of 230 lumens per watt using outcoupling enhancement was demonstrated, as were EQE of 50% and power efficiency of 110 lumens per watt at 10,000 candelas per square meter.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Helander, M G -- Wang, Z B -- Qiu, J -- Greiner, M T -- Puzzo, D P -- Liu, Z W -- Lu, Z H -- New York, N.Y. -- Science. 2011 May 20;332(6032):944-7. doi: 10.1126/science.1202992. Epub 2011 Apr 14.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Materials Science and Engineering, University of Toronto, 184 College Street, Toronto, Ontario, Canada M5S 3E4. michael.helander@utoronto.ca〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21493822" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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