https://nova.newcastle.edu.au/vital/access/ /manager/Index en-au 5 https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:29843 K) and mass density (ρ) showed a distinctive layered structure in the sclera consisting of a thin outer layer with K=2.47 ± 0.09 GPa and ρ=1.06 ± 0.02g/cm³ followed by three layers of successively decreasing K towards the vitreous body. In general, the myopic eye was less stiff at vertical distances between 1 and 4 mm from the optic nerve head. This study suggests that the Guinea pig sclera has a layered structure with different values of K and ρ; these differences may be related to the specific collagen-network structure of each layer.]]> Wed 11 Apr 2018 14:14:54 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:51632 Mon 29 Jan 2024 18:27:57 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:44487 co-2-(diethylamino)ethyl methacrylate) [P(MEO₂MA-co-DEA)] 80:20 mol % copolymer brushes were synthesized on planar silica substrates via surface-initiated activators continuously regenerated via electron transfer atom transfer radical polymerization. Brush thickness was sensitive to changes in pH and temperature as monitored with ellipsometry. At low pH, the brush is charged and swollen, while at high pH, the brush is uncharged and more collapsed. Clear thermoresponsive behavior is also observed with the brush more swollen at low temperatures compared to high temperatures at both high and low pH. Neutron reflectometry was used to determine the polymer volume fraction profiles (VFPs) at various pH values and temperatures. A region of lower polymer content, or a depletion region, near the substrate is present in all of the experimental polymer VFPs, and it is more pronounced at low pH (high charge) and less so at high pH (low charge). Polymer VFPs calculated through numerical self-consistent field theory suggest that enrichment of DEA monomers near the substrate results in the experimentally observed non-monotonic VFPs. Adsorption of DEA monomers to the substrate prior to initiation of polymerization could give rise to DEA segment-enriched region proximal to the substrate.]]> Fri 14 Oct 2022 08:57:26 AEDT ]]>