2.6. Sensory evaluation
Sensory panelists were employees of the Kearney Agricultural Center in Parlier, CA, with most having performed sensory evaluation of avocados in the past. Panelists were provided a training session instructing them in the use of hedonic and line scales, the meaning of the sensory characteristics being evaluated, and on how to properly cleanse the palate by the use of small pieces of carrot and a sip of water. Generally 12–14 panelists attended each tasting. Sensory evaluations were held in a dedicated sensory evaluation laboratory at the Kearney Agricultural Center. Panelists were seated in individual three-sided evaluation booths that were designed to standardize the testing environment. Samples were received through a small door in the booth. On the day of sensory testing fruit were removed from the storage rooms and allowed to adjust to ambient temperature conditions in the laboratory. Four fruit from each treatment were selected for sensory evaluation based upon size and firmness as determined by penetrometer measurement of firmness, the main goal being to provide fully ripe fruit to the panelists. Preparation consisted of cutting the fruit in half, top to bottom, and removing the seed. Only the mid-section of the fruit was used for sensory evaluation, with the portions above and below the seed cavity and within 13 mm of the penetrometer puncture being discarded. The remainder of the fruit was cut into pieces approximately 13 mm square and placed into 30-mL paper soufflé cups that were labeled with 3-digit random numbers for presentation to the panelists. Six samples were presented in random order to each panelist in a tasting session. Panelists rated each sample for overall liking using a 9-point hedonic scale where 1 = dislike extremely and 9 = like extremely. Then the sample was rated for the degree of creaminess, richness, nuttiness and grassiness by placing marks on 150-mm line scales corresponding to the intensity of the sensory attribute present. Twelve fruit were tasted for each treatment at each harvest date, with each fruit being tasted by 10 panelists.
2.6 ประเมินรับความรู้สึกSensory panelists were employees of the Kearney Agricultural Center in Parlier, CA, with most having performed sensory evaluation of avocados in the past. Panelists were provided a training session instructing them in the use of hedonic and line scales, the meaning of the sensory characteristics being evaluated, and on how to properly cleanse the palate by the use of small pieces of carrot and a sip of water. Generally 12–14 panelists attended each tasting. Sensory evaluations were held in a dedicated sensory evaluation laboratory at the Kearney Agricultural Center. Panelists were seated in individual three-sided evaluation booths that were designed to standardize the testing environment. Samples were received through a small door in the booth. On the day of sensory testing fruit were removed from the storage rooms and allowed to adjust to ambient temperature conditions in the laboratory. Four fruit from each treatment were selected for sensory evaluation based upon size and firmness as determined by penetrometer measurement of firmness, the main goal being to provide fully ripe fruit to the panelists. Preparation consisted of cutting the fruit in half, top to bottom, and removing the seed. Only the mid-section of the fruit was used for sensory evaluation, with the portions above and below the seed cavity and within 13 mm of the penetrometer puncture being discarded. The remainder of the fruit was cut into pieces approximately 13 mm square and placed into 30-mL paper soufflé cups that were labeled with 3-digit random numbers for presentation to the panelists. Six samples were presented in random order to each panelist in a tasting session. Panelists rated each sample for overall liking using a 9-point hedonic scale where 1 = dislike extremely and 9 = like extremely. Then the sample was rated for the degree of creaminess, richness, nuttiness and grassiness by placing marks on 150-mm line scales corresponding to the intensity of the sensory attribute present. Twelve fruit were tasted for each treatment at each harvest date, with each fruit being tasted by 10 panelists.
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