Abd El-Wahab, E. (2004). TECHNOLOGICAL STUDIES ON KAKI FRUITS. Journal of Food and Dairy Sciences, 29(12), 7137-7146. doi: 10.21608/jfds.2004.240594
E. S. Abd El-Wahab. "TECHNOLOGICAL STUDIES ON KAKI FRUITS". Journal of Food and Dairy Sciences, 29, 12, 2004, 7137-7146. doi: 10.21608/jfds.2004.240594
Abd El-Wahab, E. (2004). 'TECHNOLOGICAL STUDIES ON KAKI FRUITS', Journal of Food and Dairy Sciences, 29(12), pp. 7137-7146. doi: 10.21608/jfds.2004.240594
Abd El-Wahab, E. TECHNOLOGICAL STUDIES ON KAKI FRUITS. Journal of Food and Dairy Sciences, 2004; 29(12): 7137-7146. doi: 10.21608/jfds.2004.240594
Food Technology Research Institute, Agriculture Research Center, Giza, Egypt
Abstract
Persimmon fruit (Diospyros kaki L.) has a nutritional and economic value. Physico-chemical composition were affected by storage at 5 ± 1 °C for 6 weeks, such as viscosity (mpa. s), TSS%, AIS%, total acidity %, total sugars %, and reducing sugars %, as well as tannins content%. Results of total activity of pectinases indicate that the kaki fruit contained a high level of natural enzymes especially in the over ripe fruits. The addition of 200 ppm of pectinex USP as a commercial pectolytic enzymes and 6% from concentrated serum-pulp from over ripe kaki pulp separately at 30°C for 2 hrs. in the kaki pulp gave a kaki pulp characterized by higher total soluble solid, and lower AIS and viscosity in both treatments. Meanwhile soluble tannins clearly decreased when 6% of concentrated serum-pulp were added. Organoleptic evaluation revealed that the nectar prepared from pectinex treated pulp had a higer score of color and appearance perciption. Whereas the nectar prepared from concentrated serum-pulp had a higher score of taste, aroma and the overall acceptability at room temperature after 3 months storage period. Statistical analysis ascertained that, there were significant differences between some of organoleptic parameters such color and aroma of the nectars after the end of storage.
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