Lower Cretaceous fossil localities along the south coast of Victoria, southeastern Australia, reveal a rich terrestrial biota that inhabited volcaniclastic river floodplains within the extensional rift system between Australia and Antarctica (Fig. 1; Fig. S1) (Rich & Rich, 1989; Willcox & Stagg, 1990; Dettmann et al., 1992; Rich & Vickers-Rich, 2000; Rich, Vickers-Rich & Gangloff, 2002). Among the diverse assemblage of terrestrial and aquatic tetrapods currently recognised from this region-temnospondyls, crocodyliforms, ornithischian and theropodan dinosaurs, multituberculate, monotreme and tribosphenic mammals, plesiosaurs, pterosaurs and chelonians-small-bodied, turkey- to rhea-sized ornithopod dinosaurs were especially abundant and diverse (Woodward, 1906; Flannery & Rich, 1981; Molnar, Flannery & Rich, 1981; Rich & Rich, 1989; Rich & Vickers-Rich, 1994; Currie, Vickers-Rich & Rich, 1996; Rich, Gangloff & Hammer, 1997; Warren, Rich & Vickers-Rich, 1997; Rich & Vickers-Rich, 1999, 2000; Rich, Vickers-Rich & Gangloff, 2002; Rich & Vickers-Rich, 2004; Kear, 2006; Smith et al., 2008; Close et al., 2009; Rich et al., 2009a, 2009b; Barrett et al., 2010; Benson et al., 2010; Herne, Nair & Salisbury, 2010; Barrett et al., 2011a; Benson et al., 2012; Fitzgerald et al., 2012).
pes 2009 highly compressed pc
Synthesis of PAni-Y2O3 composites was carried out by a single-step, in situ chemical oxidative polymerization technique with ammonium persulfate (APS) as the oxidant (37). Fine-grade Y2O3 powder at weight percentages (wt%) of 10, 20, 30, 40 and 50 was added to a freshly prepared reaction mixture (0.2 mol/l aniline and 0.25 mol/l APS in 1 mol/l HCl) at 5C. The mixture was stirred during the polymerization of aniline for 10 h. The resultant solution was filtered and washed with deionized water and acetone. The recovered composite was dried at 60C in a hot air oven for 8 h to achieve constant weight. These synthesized PAni composites with various weight percentages of Y2O3 (PY1, PAni with Y2O3 of 10 wt%; PY2, 20 wt%; PY3, 30 wt%; PY4, 40 wt%; and PY5, 50 wt%) were compressed into rectangular pellets under a pressure of 9 tons in a table-top hydraulic pellet press. These rectangular pellets of standard X-band (WR-90) dimensions of thickness of up to 0.0025 m fit exactly between the X-band waveguide adapters of a vector network analyzer. 2ff7e9595c
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