Nathan T. Morrell

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Wnt signals exercise strong cell-biological and regenerative effects of considerable therapeutic value. There are, however, no specific Wnt agonists and no method for in vivo delivery of purified Wnt proteins. Wnts contain lipid adducts that are required for activity and we exploited this lipophilicity by packaging purified Wnt3a protein into lipid(More)
Type Ia supernovae are key tools for measuring distances on a cosmic scale. They are generally thought to be the thermonuclear explosion of an accreting white dwarf in a close binary system. The nature of the mass donor is still uncertain. In the single-degenerate model it is a main-sequence star or an evolved star, whereas in the double-degenerate model it(More)
INTRODUCTION Injury to the saphenous nerve at the ankle has been described as a complication resulting from incision and dissection over the distal tibia and medial malleolus. However, the exact course and location of the distal saphenous nerve is not well described in the literature. The purpose of this study was to determine the distal limit of the(More)
  • Joanna Thomas-Osip, Andrew Mcwilliam, M M Phillips, N Morrell, I Thompson, T Folkers +1 other
  • 2008
We report precipitable water vapor (PWV) measurements made at Las Campanas Observatory using optical spectra of H 2 O lines obtained with the Magellan echelle spec-trograph, and calculated using a robust technique that is accurate to 5-10%. Calibration of the relationship between our PWV measurements and opacity values at 225 GHz was – 2 – made possible by(More)
  • R Gamen, Gosset, N Morrell, V Niemela, H Sana, Y Nazé +3 others
  • 2006
(Affiliations are given below the references) ABSTRACT Context. Since the discovery, with the EINSTEIN satellite, of strong X-ray emission associated with HD 93162 (≡WR 25), this object has been predicted to be a colliding-wind binary system. However, radial-velocity variations that would prove the suspected binary nature have yet to be found. Aims. We(More)
  • Subo Dong, B J Shappee, J L Prieto, S W Jha, K Z Stanek, T W-S Holoien +24 others
  • 2016
We report the discovery of ASASSN-15lh (SN 2015L), which we interpret as the most luminous supernova yet found. At redshift z = 0.2326, ASASSN-15lh reached an absolute magnitude of Mu ,AB = -23.5 ± 0.1 and bolometric luminosity Lbol = (2.2 ± 0.2) × 10(45) ergs s(-1), which is more than twice as luminous as any previously known supernova. It has several(More)
  • A Damineli, D J Hillier, M F Corcoran, O Stahl, J H Groh, J Arias +10 others
  • 2008
A full description of the 5.5-yr low excitation events in η Carinae is presented. We show that they are not simple and brief, as thought before, but a combination of two components. The first, the 'slow variation' component, is revealed by slow changes in the ionization level of circumstellar matter across the whole cycle and is caused by the gradual(More)
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