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North Polar Frontal Clouds And Dust Storms On Mars During Spring And Summer, Huiqun Wang, Jenny A. Fisher
North Polar Frontal Clouds And Dust Storms On Mars During Spring And Summer, Huiqun Wang, Jenny A. Fisher
Faculty of Science - Papers (Archive)
The complete archive of Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) Mars Daily Global Maps (MDGM) are used to study north polar clouds and dust storms that exhibit frontal structures during the spring and summer (Ls 0–180°). Results show that frontal events generally follow the edge of the polar cap during spring and mid/late summer with a gap in the distribution in early summer. The exact duration and timing of the gap vary from year to year. Twww.lw20.comen to twenty percent of spring and summer time frontal events exhibit complex morphologies. Distinct temperature signatures are associated with features observed …
Ion-Molecule Reactions Of O,S-Dimethyl Methylphosphonothioate: Evidence For Intramolecular Sulfur Oxidation During Vx Perhydrolysis, Jilliarne Williams, Martin Paine, Stephen J. Blanksby, Michael L. Rogers, Andrew M. Mcanoy
Ion-Molecule Reactions Of O,S-Dimethyl Methylphosphonothioate: Evidence For Intramolecular Sulfur Oxidation During Vx Perhydrolysis, Jilliarne Williams, Martin Paine, Stephen J. Blanksby, Michael L. Rogers, Andrew M. Mcanoy
Faculty of Science - Papers (Archive)
The alkaline perhydrolysis of the nerve agent O-ethyl S-[2-(diisopropylamino)ethyl] methylphosphonothioate (VX) was investigated by studying the ion-molecule reactions of HOO- with O,S-dimethyl methylphosphonothioate in a modified linear ion-trap mass spectrometer. In addition to simple proton transfer, two other abundant product ions are observed at m/z 125 and 109 corresponding to the S-methyl methylphosphonothioate and methyl methylphosphonate anions, respectively. The structure of these product ions is demonstrated by a combination of collision-induced dissociation and isotope-labeling experiments that also provide evidence for their formation by nucleophilic reaction pathways, namely, (i) S(N)2 at carbon to yield the S-methyl methylphosphonothioate anion and (ii) nucleophilic …
Aboriginal Settlement During The Lgm At Brockman, Pilbara Region, Western Australia, Michael Slack, Melanie Fillios, Richard L. Fullagar
Aboriginal Settlement During The Lgm At Brockman, Pilbara Region, Western Australia, Michael Slack, Melanie Fillios, Richard L. Fullagar
Faculty of Science - Papers (Archive)
This paper describes the results and implications of recent excavations on the Hamersley Iron Brockman 4 tenement, near Torn Price, Western Australia. Results concentrate on two rock shelters with Aboriginal occupation starting at least 32,000 years ago and extending throughout the Last Glacial period. Preliminary observations are proposed concerning the nature of Aboriginal foraging patterns as displayed in the flaked stone and faunal records for the Brockman region.