2.4. Determination of peel color and fruit firmness
Ten individual fruit were selected for the determination of peel color, which was measured around the equatorial region of the middle part of the fruit at three points using a Chromameter- 2 reflectance colorimeter (Minolta, Osaka, Japan) equipped with a CR-300 measuring head. Color was recorded using the CIE a*, b* and L* scale, where a* indicates green-red color, b* indicates blue-yellow color and L* indicates the light (scaled 1–100, 1 indicates the black and 100 indicates white). The instrument was calibrated with a standard white tile before measurements were taken. The values of a* and b* were converted into hue angle: h _ = tan _1 (b*/a*). Fruit firmness was determined as described by Yan et al. (2011). Fruit firmness (N) was expressed as the mean of three measure- ments.
2.4. Determination of peel color and fruit firmness Ten individual fruit were selected for the determination of peel color, which was measured around the equatorial region of the middle part of the fruit at three points using a Chromameter- 2 reflectance colorimeter (Minolta, Osaka, Japan) equipped with a CR-300 measuring head. Color was recorded using the CIE a*, b* and L* scale, where a* indicates green-red color, b* indicates blue-yellow color and L* indicates the light (scaled 1–100, 1 indicates the black and 100 indicates white). The instrument was calibrated with a standard white tile before measurements were taken. The values of a* and b* were converted into hue angle: h _ = tan _1 (b*/a*). Fruit firmness was determined as described by Yan et al. (2011). Fruit firmness (N) was expressed as the mean of three measure- ments.
การแปล กรุณารอสักครู่..
