Comparison on the antioxidant properties of fresh and convection oven-dried guava (Psidium guajava L.)


Citation

Siow L. F, . and Hui Y. W, . Comparison on the antioxidant properties of fresh and convection oven-dried guava (Psidium guajava L.). pp. 639-644. ISSN 22317546

Abstract

Antioxidant properties of both fresh and convection oven-dried guavas (Psidium guajava L.) were determined. Guava slices of 1.0 cm wide 3.0 cm long and 0.5cm thick (20 g) were subjected to convection drying at 40C for 9 12 and 14 hours respectively and their water activity total phenolic content (TPC) and antioxidant activities were measured. Guavas that had been subjected to drying for 9 12 and 14 hours were shown to achieve the water activity of 0.36-0.49. Ascorbic Acid Equivalent Antioxidant Capacity (AEAC) of guava was found to decrease for all the drying durations. Convection oven-drying of guava for 12 and 14 hours showed a significant decrease in TPC (p 0.01) and Ferric Reducing Power Assay (FRP) (p 0.01). Nine hours of convection oven-drying was shown to retain most of the TPC AEAC and FRP of guava.


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Abstract

Antioxidant properties of both fresh and convection oven-dried guavas (Psidium guajava L.) were determined. Guava slices of 1.0 cm wide 3.0 cm long and 0.5cm thick (20 g) were subjected to convection drying at 40C for 9 12 and 14 hours respectively and their water activity total phenolic content (TPC) and antioxidant activities were measured. Guavas that had been subjected to drying for 9 12 and 14 hours were shown to achieve the water activity of 0.36-0.49. Ascorbic Acid Equivalent Antioxidant Capacity (AEAC) of guava was found to decrease for all the drying durations. Convection oven-drying of guava for 12 and 14 hours showed a significant decrease in TPC (p 0.01) and Ferric Reducing Power Assay (FRP) (p 0.01). Nine hours of convection oven-drying was shown to retain most of the TPC AEAC and FRP of guava.

Additional Metadata

[error in script]
Item Type: Article
AGROVOC Term: Antioxidants
AGROVOC Term: Guavas
AGROVOC Term: Convection
AGROVOC Term: Drying
AGROVOC Term: Psidium guajava
Depositing User: Ms. Suzila Mohamad Kasim
Last Modified: 24 Apr 2025 06:27
URI: http://webagris.upm.edu.my/id/eprint/21778

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