Mostrando 1,841 - 1,860 Resultados de 334,646 Para Buscar '"electrón"', tiempo de consulta: 0.91s Limitar resultados
  1. 1841
    por Baskin, Artem, Král, Petr
    Publicado 2011
    “…We use large scale ab-initio calculations to describe electronic structures of graphene, graphene nanoribbons, and carbon nanotubes periodically perforated with nanopores. …”
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  2. 1842
  3. 1843
    por Schattschneider, P., Verbeeck, J.
    Publicado 2011
    “…The recent creation of electron vortex beams and their first practical application motivates a better understanding of their properties. …”
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  4. 1844
  5. 1845
    por Tsutsui, Makusu, Taniguchi, Masateru
    Publicado 2012
    “…This has led to significant progress in understanding electron transport in molecular systems at the single-molecule level and the concomitant emergence of new device concepts. …”
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  6. 1846
    por Ackermann, Hans-W.
    Publicado 2011
    “…The first phage electron micrographs were published in 1940 in Germany and proved the particulate nature of bacteriophages. …”
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  7. 1847
    “…Here we report that site-selectivity can be tuned by simply modifying the electronic nature of the reagents. A Hammett analysis is consistent with linking of this phenomenon to the Hammond postulate: electronic tuning to a more product-like transition state amplifies site-discriminating interactions between a reagent and its substrate. …”
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  8. 1848
    “…Researchers have used transmission electron microscopy (TEM) to make contributions to cell biology for well over 50 years, and TEM continues to be an important technology in our field. …”
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  9. 1849
    por Winkler, Jay R., Gray, Harry B.
    Publicado 2014
    “…[Image: see text] Electrons have so little mass that in less than a second they can tunnel through potential energy barriers that are several electron-volts high and several nanometers wide. …”
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  10. 1850
    por Cheng, Tianrong
    Publicado 2014
    “…OBJECTIVE: To review the available evidence evaluating the chemicals in refill solutions, cartridges, aerosols and environmental emissions of electronic cigarettes (e-cigarettes). METHODS: Systematic literature searches were conducted to identify research related to e-cigarettes and chemistry using 5 reference databases and 11 search terms. …”
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  11. 1851
  12. 1852
  13. 1853
  14. 1854
    “…In this study, various spectroscopic (electronic absorption, circular dichroism, magnetic circular dichroism, and resonance Raman) and computational (density functional theory (DFT) and time-dependent DFT) techniques were used to generate experimentally validated electronic structure descriptions for the “base-on” and “base-off” forms of NOCbl. …”
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  15. 1855
  16. 1856
    “…Electrical interfaces between biological cells and man-made electrical devices exist in many forms, but it remains a challenge to bridge the different mechanical and chemical environments of electronic conductors (metals, semiconductors) and biosystems. …”
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  17. 1857
    “…Our algorithm provides future researchers a road map on how to set up, maintain, and use an electronic database to improve evidence-based care and future clinical outcomes. …”
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  18. 1858
    por Lahme, S., Kealhofer, C., Krausz, F., Baum, P.
    Publicado 2014
    “…Ultrafast electron diffraction allows the tracking of atomic motion in real time, but space charge effects within dense electron packets are a problem for temporal resolution. …”
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  19. 1859
    “…Concerns about the increasing use of electronic cigarettes (e-cigarettes) and the impact of such use on smoke and tobacco-free policies have arisen, but to date, no systematic data describes e-cigarette policies on hospital campuses. …”
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  20. 1860
    por Read, David T., Dally, James W.
    Publicado 1996
    “…When a specimen surface carrying a high-frequency line grating is examined under a scanning electron microscope (SEM), moiré fringes are observed at several different magnifications. …”
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