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. Author manuscript; available in PMC: 2016 Aug 1.
Published in final edited form as: J Food Eng. 2015 Aug 1;159:36–41. doi: 10.1016/j.jfoodeng.2015.03.012

Table 3. Increase in x-ray attenuation on compression of bread in accordance with Beer-Lambert's law.

Whole wheat bread compressed to 1.5cm Average x-ray attenuation, μ (1/cm) Apparent density calculated using the density equation (7) (g/cm3) Apparent density using dimension techniques (g/cm3)
At 45 kVp At 55 kVp At 70 kVp ρ SD ρ SD
2 slices 0.206 0.171 0.142 0.357a 0.018 0.307a 0.035
4 slices 0.377 0.309 0.260 0.648a 0.020 0.607a 0.052
6 slices 0.609 0.492 0.410 0.947a 0.025 0.939a 0.078

Values are means, n=3; Means with different letter in a row differ significantly, p<0.05