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Intra-Ring Wood Density and Dynamic Modulus of Elasticity Profiles for Black Spruce and Jack Pine from X-ray Densitometry and Ultrasonic Wave Velocity Measurement

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Academic year: 2021

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Figure

Figure 1. Prototype device for measuring the ultrasonic wave propagation time.
Figure 3 shows the within-ring variation in wood density and DMOE for black spruce and jack pine, revealing similar within-ring density patterns between the two species
Figure 3. Examples of within-ring profiles and the fits obtained with the 6th order polynomials for:
Table 1. Average, standard variation (between parenthesis) and range of Pearson’s coefficient of  determination between measured and predicted within-ring density and DMOE values from the 6th  order polynomial models for different rings for black spruce an
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