Freeze-drying is a trend method for the preservation
of thermosensitive and nutritive food products. In this study, two different fruits,
kiwi fruit with high ascorbic acid content and cherry laurel fruit with high phenolic
content, were selected to study the freeze-drying effect on these compounds.
Ascorbic acid content, total phenolic content and antioxidant capacity of kiwi
and cherry laurel fruits were determined before and after freeze-drying
process. Ascorbic acid content of kiwi and cherry laurel fruit were 205.14±21.33
and 3.00±1.02
mg/100 g dry matter, respectively. Total phenolic content of kiwi and cherry
laurel fruits were 262.66±19.97
and 1056.78±90.73 mg GAE/100 g dry matter, respectively. Ascorbic acid contents
did not change, while antioxidant capacities increased by freeze-drying process
for both fruits. The total phenolic content of cherry laurel fruits increased significantly
after freeze-drying in contrast to the total phenolic content of kiwi fruits.
Color values changed with freeze-drying, the lightness and yellowness values
increased significantly for both fruits (p<0.05). The rehydration ratios of
freeze-dried kiwi and cherry laurel fruits were found similar at 25 and 40°C. The rehydration ratio in water at 40°C increased more quickly in the beginning of
immersion than the ratio at 25°C. The
results of this study showed that freeze-drying method is highly recommended
for the preservation of nutritive values of these fruits and off-season
products.
Ascorbic acid Phenolic Cherry laurel Kiwi fruit Freeze-drying
Birincil Dil | İngilizce |
---|---|
Bölüm | Araştırma Makaleleri |
Yazarlar | |
Yayımlanma Tarihi | 26 Mart 2019 |
Gönderilme Tarihi | 9 Ekim 2018 |
Yayımlandığı Sayı | Yıl 2019 Cilt: 17 Sayı: 1 |
Bu eser Creative Commons Atıf-GayriTicari 4.0 (CC BY-NC 4.0) Uluslararası Lisansı ile lisanslanmıştır.
Akademik Gıda (Academic Food Journal) is licensed under a Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0).