Cr 10

The pH was measured repeatedly five times for each sample using a pH-meter (MP-120, Mettler-Toledo, Schwarzenbach, Switzerland). Results were derived as average values. Color values of raw meats of post- and pre-rigor and cured pork loins before and after cooking were repeatedly measured six times to obtain the average value. The meat color of cured pork loin was measured using a color meter (CR-10, Minolta Co, LTD, Osaka, Japan) with aperture size of 8 mm and a CIE standard illuminant D65 and 10° observer. Lightness (L* value), redness (a* value), and yellowness (b* value) were recorded.

About 15 flowers at different branches from same plant were collected and mixed, and their petals were used for the measurement of flower color. Petals from every plant (all nine plants and three in each treatment), were measured respectively. The color of fresh petals was measured using lightness (L*), hue-angle (h*), and two chromatic components, a* and b*, of the CIEL*a*b*color coordinates using a Color Reader (CR-10; Konica Minolta Sensing Inc., Tokyo, Japan). L* values indicated lightness, and the h* values were calculated from tan⁻¹(b*/a*) [49 (link)].

The color of steamed and unsteamed maple wood before and after irradiation was measured in the color space CIE L*a*b*. To measure the color of maple wood, in the color space CIE L*a*b*, the color reader CR-10 (Konica Minolta, Osaka, Japan) was measured. A D65 light source was used and the diameter of the optical scanning aperture was 8 mm.
The color measurement was performed on a radial surface machined by planning. The color coordinates of maple wood samples in the color space CIE L*a*b* before irradiation are given in Table 1.
The total color difference ΔE* of the color change of the surface of the maple wood samples under the influence of UV radiation is determined according to the following equation ISO 11 664-4:
$$\Delta E^{*}=\sqrt{{\left(L_{298}^{*}-L_0^{*}\right)}^2+{\left(a_{298}^{*}-a_0^{*}\right)}^2+{\left(b_{298}^{*}-b_0^{*}\right)}^2}$$
where L^*₀, a^*₀, b^*₀ are values on the coordinates of the color space of the surface of the dried milled native and thermally treated maple wood before exposure.
L^*₂₉₈, a^*₂₉₈, b^*₂₉₈ are values on the surface color coordinates of the dried milled native and thermal treated maple wood during UV exposure.