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Table 35. MC gradient results – E.pilularis Final MC gradient (%) BBT2 BBT3 Vacuum Conventional Vacuum Conventional 0.5 -0.2 3.2 0.8 -0.8 -1.5 0.7 0.4 < 0.0001 0.4 -0.1 1.5 0.4 -0.6 -0.6 0.5 0.2 < 0.0001 AA AA Average Maximum Minimum Standard deviation Significance (p) Grade quality (AS/NZS 4787 ) Basic density BBT1 Vacuum Conventional 1.4 0.4 3.5 1.0 -0.4 -0.5 0.9 0.3 < 0.0001 B A BBT4 Vacuum 1.0 3.6 -0.8 0.9 NA A The basic density results are displayed in Figure 35 and Table 36. Multiple pairwise comparisons produced significant differences between basic density populations of trials BBT1 and BBT2 but not between any other trial. The average basic density recorded each trial is similar to the value recorded by (Bootle, 2004) of 710 kg/m3 for mature native forest E. pilularis. 900 850 800 750 700 650 600 550 500 BBT1 BBT2 BBT3 BBT4 Table 36. Initial basic density results – E. pilularis Trial Average Maximum Minimum Standard deviation Basic density (kg/m3) BBT1 BBT2 BBT3 731.2 696.6 715.5 849.8 827.8 850.9 558.2 538.6 518.5 60.2 67.2 64.4 BBT4 713.6 883.6 539.2 67.2 Figure 35. Scattergram of basic density – E. pilularis Evaluation of super–heated steam vacuum drying viability and development of a predictive drying model for Australian hardwood species – Final report 71 Basic density (kg/m3)PDF Image | Evaluation of super-heated steam vacuum drying
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