2.8. Sensory evaluation
Sensory evaluation of beverages was carried out on 1st day of storage at 4 _C. Sensory evaluation of the samples was made individually by using three-point ranking test (Altug & Elmaci, 2005). Ranking test was applied to questions of sensory intensities. Three samples were tested with a panel of 20 untrained panelists. The panelists received the samples (coded with three digit numbers) in balanced, random order. Panelists ranked three samples in ascending order of any related property. Water was provided for mouth rinsing during the ranking of individual samples. Because the rank scale used was 1 ผ preferred least and 3 ผ preferred most, the highest rank sum meant that the product was the most preferred. The ranking datawas analyzed by using the critical value tables (Lawless & Heymann, 2010; Newell & MacFarlane, 1987). For each property, the ranks were summed and the differences between the sums were compared to critical value in this table. The number where the two points cross was the critical value for the difference; in our case it was 15. If the difference of sum of their rank between each pair of samples was greater than the critical value, it was considered that the samples were significantly different in the related property or in overall acceptability (Marshall, 2006). On the other hand, to determine which samples were significantly different, the multiple comparison test (Duncan) method was also performed. Significant differences between fermented beverages having different apple juice concentrations were
evaluated for each sensory property, individually. Since this study involved taste or food quality evaluations,where the soy milk, apple juice and the culture used are wholesomeproducts without additives, it has fallen into Exempt Category of IRB procedure (Anonymous, 2015).
2.8. Sensory evaluationSensory evaluation of beverages was carried out on 1st day of storage at 4 _C. Sensory evaluation of the samples was made individually by using three-point ranking test (Altug & Elmaci, 2005). Ranking test was applied to questions of sensory intensities. Three samples were tested with a panel of 20 untrained panelists. The panelists received the samples (coded with three digit numbers) in balanced, random order. Panelists ranked three samples in ascending order of any related property. Water was provided for mouth rinsing during the ranking of individual samples. Because the rank scale used was 1 ผ preferred least and 3 ผ preferred most, the highest rank sum meant that the product was the most preferred. The ranking datawas analyzed by using the critical value tables (Lawless & Heymann, 2010; Newell & MacFarlane, 1987). For each property, the ranks were summed and the differences between the sums were compared to critical value in this table. The number where the two points cross was the critical value for the difference; in our case it was 15. If the difference of sum of their rank between each pair of samples was greater than the critical value, it was considered that the samples were significantly different in the related property or in overall acceptability (Marshall, 2006). On the other hand, to determine which samples were significantly different, the multiple comparison test (Duncan) method was also performed. Significant differences between fermented beverages having different apple juice concentrations wereevaluated for each sensory property, individually. Since this study involved taste or food quality evaluations,where the soy milk, apple juice and the culture used are wholesomeproducts without additives, it has fallen into Exempt Category of IRB procedure (Anonymous, 2015).
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