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Filtering by: Creator Graves, Joshua D. Remove constraint Creator: Graves, Joshua D. Decade 2000-2009 Remove constraint Decade: 2000-2009

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  • Total synthesis of (-)-7-epicylindrospermopsin

    Creator:
    Hansen, Joshua D.
    Abstract:
    The first asymmetric synthesis of (-)-7-epicylindrospermopsin via intramolecular nitrone cycloaddition is described. The synthesis utilized a convergent approach to prepare the cycloaddition precursor 176, which was assembled by condensation of hydroxylamine 175 with aldehyde 145. Hydroxylamine 175 was synthesized from ethylene glycol (166) in seven steps. Aldehyde 145 was completed...
    Resource Type:
    Dissertation
    Full Text:
    OF THE DISSERTATION OF Joshua D. Hansen for the degree of Doctor of Philosophy in Chemistry

  • The Gospel : according to Matt

    Creator:
    Weber, Joshua D.
    Abstract:
    The Gospel: According to Matt is a novel, told in the first person, simple past tense, depicting the struggle of a young man attempting to make sense of his relationship with his estranged father as he wrestles with a growing crisis of faith. Matt is deeply sincere in his desire...
    Resource Type:
    Masters Thesis
    Full Text:
    AN ABSTRACT OF THE THESIS OF Joshua D. Weber for the degree of

  • Accretion of interplanetary dust in polar ice

    Creator:
    Brook, Edward J., Kurz, Mark D., Curtice, Joshua, and Cowburn, Stuart
    Abstract:
    Measurements of helium isotopes in particles separated from polar ice demonstrate that extraterrestrial ³He dominates the ³He flux at the GISP2 (Greenland) and Vostok (Antarctica) ice core sites. Replicate measurements of late Holocene ice samples yield ³He fluxes of 0.62±0.27×10⁻¹² cm³ STP cm⁻² ka⁻¹ (GISP2) and 0.77 ± 0.25 ×...
    Resource Type:
    Article
    Full Text:
    , USA Mark D. Kurz and Joshua Curtice Department of Marine Chemistry and Geochemistry, Woods Hole