Browsing by Title

Now showing items 8177-8196 of 24102

    • The extraction of total RNA by the detergent and phenol method 

      Slater, R. J. (1984)
      Successful extraction of RNA depends on the quantitative recovery of pure nucleic acids in an undegraded form. In practice, this means that a selective extraction process is required to remove all the unwanted cellular ...

    • Extraction of underlying factors causing construction projects delay in Nigeria 

      Egwim, Christian Nnaemeka; Alaka, Hafiz; Oseghale, Raphael; Balogun, Habeeb (2021-09-07)
      Purpose This paper aims to establish the most underlying factors causing construction projects delay from the most applicable. Design/methodology/approach The paper conducted survey of experts using systematic review of ...

    • Extragalactic archaeology with the C, N, and O chemical abundances 

      Vincenzo, Fiorenzo; Kobayashi, Chiaki (2018-02-09)
      We predict how the C, N, and O abundances within the interstellar medium of galaxies evolve as functions of the galaxy star formation history (SFH). We adopt a hydrodynamical cosmological simulation, focusing on three ...

    • Extragalactic chemistry of molecular gas: lessons from the local universe 

      Garcia-Burillo, S.; Fuente, A.; Martin-Pintado, J.; Usero, A.; Gracia-Carpio, J.; Planesas, P. (2006)

    • Extragalactic Peaked-Spectrum Radio Sources at Low Frequencies 

      Callingham, J. R.; Ekers, R. D.; Gaensler, B. M.; Line, J. L. B.; Hurley-Walker, N.; Sadler, E. M.; Tingay, S. J.; Hancock, P. J.; Bell, M. E.; Dwarakanath, K. S.; For, B. -Q.; Franzen, T. M. O.; Hindson, Luke; Johnston-Hollitt, M.; Kapinska, A. D.; Lenc, E.; McKinley, B.; Morgan, J.; Offringa, A. R.; Procopio, P.; Staveley-Smith, L.; Wayth, R. B.; Wu, C.; Zheng, Q. (2017-02-20)
      We present a sample of 1,483 sources that display spectral peaks between 72 MHz and 1.4 GHz, selected from the GaLactic and Extragalactic All-sky Murchison Widefield Array (GLEAM) survey. The GLEAM survey is the widest ...

    • Extragalactic Peaked-Spectrum Radio Sources at Low-Frequencies are Young Radio Galaxies 

      Slob, M. M.; Callingham, J. R.; Röttgering, H. J. A.; Williams, W. L.; Duncan, K. J.; Gasperin, F. de; Hardcastle, M. J.; Miley, G. K. (2022-12-20)
      We present a sample of 373 peaked-spectrum (PS) sources with spectral peaks around 150 MHz, selected using a subset of the two LOw Frequency ARray (LOFAR) all-sky surveys, the LOFAR Two Meter Sky Survey and the LOFAR LBA ...

    • Extragalactic Radio Sources as a Piece of the Cosmological Jigsaw 

      Krause, M. (2018-02-26)
      Early on, extragalactic radio sources have pointed to a cosmologically evolv- ing Universe. They were also an important piece of evidence for the existence of supermassive black holes, now thought to be a key component of ...

    • An extragalactic spectroscopic survey of the SSA22 field 

      Saez, C.; Lehmer, B. D.; Bauer, F. E.; Stern, D.; Gonzales, A.; Rreza, I.; Alexander, D. M.; Matsuda, Y.; Geach, J. E.; Harrison, F. A.; Hayashino, T. (2015-07-01)
      We present Very Large Telescope VIMOS, Keck DEIMOS and Keck LRIS multi-object spectra of 367 sources in the field of the z ≈ 3.09 protocluster SSA22. Sources are spectroscopically classified via template matching, allowing ...

    • Extrasolar planets around HD 196050, HD 216437 and HD 160691 

      Jones, H.R.A.; Butler, R.P.; Marcy, G.W.; Tinney, C.G.; Penny, A.J.; McCarthy, C.; Carter, B.D. (2002-12)

    • Extreme infrared variables from UKIDSS - II. an end-of-survey catalogue of eruptive YSOs and unusual stars 

      Lucas, P. W.; Smith, L. C.; Pena, C. Contreras; Froebrich, Dirk D.; Drew, Janet E.; Kumar, M. S. N.; Borissova, J.; Minniti, D.; Kurtev, R.; Monguio, M. (2017-12-11)
      We present a catalogue of 618 high-amplitude infrared variable stars (1 < ΔK < 5 mag) detected by the two widely separated epochs of 2.2 μm data in the UKIDSS Galactic plane survey, from searches covering ∼1470 deg2. Most ...

    • Extreme infrared variables from UKIDSS-I : A concentration in star-forming regions 

      Contreras Peña, C.; Lucas, P.W.; Froebrich, D.; Kumar, M.S.N.; Goldstein, J.; Drew, J.E.; Adamson, A.J.; Davis, C.J.; Barentsen, Geert; Wright, N.J. (2014-04-01)
      We present initial results of the first panoramic search for high-amplitude near-infrared variability in theGalactic plane.We analyse the widely separated two-epoch K-band photometry in the fifth and seventh data releases ...

    • The extreme phronesis of Percy Cerutty : A narrativized life history of a legendary sports coach 

      Turner, David (2017-09-23)
      This paper presents and interprets a narrativized coaching life history of the Australian athletics coach Percy Cerutty (1895-1975). Through a relational process of self-improvement and practical wisdom sometimes called ...

    • Extreme radio flares and associated X-ray variability from young stellar objects in the Orion Nebula Cluster 

      Forbrich, Jan; Reid, Mark J.; Menten, Karl M.; Rivilla, Victor M.; Wolk, Scott J.; Rau, Urvashi; Chandler, Claire J. (2017-07-27)
      Young stellar objects are known to exhibit strong radio variability on timescales of weeks to months, and a few reports have documented extreme radio flares with at least an order of magnitude change in flux density on ...

    • The extreme red afterglow of GRB 060923: distance or dust? 

      Tanvir, N.; Levan, A.; Rol, E.; Starling, R.L.; Gorosabel, J.; Priddey, R.; Malesani, D.; Jakobsson, P.; O'Brien, P.T.; Jaunsen, A.O.; Hjorth, J.; Fynbo, J.; Melandri, A.; Gomboc, A.; Milvang-Jensen, B.; Fruchter, A.S.; Jarvis, M.J.; Fernandes, C.A.C.; Wold, T. (2008)

    • Extreme sensitivity displayed by single-crystal diamond deep ultra-violet photoconductive devices 

      Bevilacqua, Mose; Jackman, Richard B. (2009)
      Deep UV detection using a single crystal diamond (SCD) substrate without a homoepitaxial layer has been demonstrated using a defect passivation treatment. Despite evidence of surface damage on the SCD, the treatments lead ...

    • Extreme star formation in the Milky Way: luminosity distributions of young stellar objects in W49A and W51 

      Eden, D. J.; Moore, T. J. T.; Urquhart, J. S.; Elia, D.; Plume, R.; Konig, C.; Baldeschi, A.; Schisano, E.; Rigby, A. J.; Morgan, L. K.; Thompson, M. A. (2018-07-01)
      We have compared the star-formation properties of the W49A and W51 regions by using far-infrared data from the Herschel infrared Galactic Plane Survey (Hi-GAL) and 850-μm observations from the James Clerk Maxwell Telescope ...

    • An Extreme Starburst in the Core of a Rich Galaxy Cluster at z = 1.7 

      Webb, T.; Noble, A.; DeGroot, A.; Wilson, G.; Muzzin, A.; Bonaventura, N.; Cooper, M.; Delahaye, A.; Foltz, R.; Lidman, C.; Surace, J.; Yee, H.~K.~C.; Chapman, S.; Dunne, L.; Geach, J.; Hayden, B.; Hildebrandt, H.; Huang, J.; Pope, A.; Smith, M.~W.~L.; Perlmutter, S.; Tudorica, A. (2015-08-21)
      We have discovered an optically rich galaxy cluster at z = 1.7089 with star formation occurring in close proximity to the central galaxy. The system, SpARCS104922.6+564032.5, was detected within the Spitzer Adaptation of ...

    • Extremely Faint Blue-tail Stars in Centauri 

      Moehler, S.; Napiwotzki, R.; Sweigart, A.V.; Landsman, S.; Dreizler, S. (2002)

    • Extremely faint blue-tail stars in ω Centauri 

      Moehler, S.; Napiwotzki, R.; Sweigart, A.V.; Landsman, S.; Dreizler, S. (Astronomical Society of the Pacific, 2002)

    • Extremely inefficient star formation in the outer disks of nearby galaxies 

      Bigiel, F.; Leroy, A.; Walter, F.; Blitz, L.; Brinks, E.; de Blok, W.J.G.; Madore, B. (2010)
      We combine data from The H I Nearby Galaxy Survey and the GALEX Nearby Galaxy Survey to study the relationship between atomic hydrogen (H I) and far-ultraviolet (FUV) emission outside the optical radius (r 25) in 17 spiral ...