Volume 9, Issue 36 (2012)
FSCT 2012, 9(36): 1-10 |
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Study of color changes of Mazafati date during drying for selecting optimum air temperature of drier. FSCT 2012; 9 (36) :1-10
URL: http://fsct.modares.ac.ir/article-7-2325-en.html
URL: http://fsct.modares.ac.ir/article-7-2325-en.html
Study of color changes of Mazafati date during drying for selecting optimum air temperature of drier
Abstract: (11153 Views)
In this study, Mazafati date samples were dried using a cabinet drier at five temperatures (50, 60, 70, 80 and 90 ˚C) and air flow rate of 1 m/s. Changes of total soluble solids, browning, pH, acidity and color parameters (L*, a* and b*) of date samples during drying were determined and compared. The results showed that total soluble solids, browning index and acidity increased and pH of date samples decreased. Moreover, L* and b* color parameters decreased and a* value increased. Overall, it was concluded that the moisture of Mazafati dates can be reduced by industrial drying. Furthermore, air temperatures of greater than 70˚C have negative effects on color of the date samples. Therefore, drying temperature of 70˚C was found to be the optimum condition for drying process of Mazafati date.
Received: 2011/10/24 | Accepted: 2012/10/23 | Published: 2012/10/23
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