Functional potential and food safety of fresh-cut ‘Paluma’ guava under edible coatings

Authors

DOI:

https://doi.org/10.5433/1679-0359.2021v42n4p2313

Keywords:

Modified Atmosphere, ABTS. beta-carotene, DPPH, Lycopene, PET, Sodium alginate, Microbial quality.

Abstract

Guava is a fruit rich in antioxidants and its value can be enhanced by fresh-cut processing, which increases convenience for consumption. The objective of this study was to evaluate the changes in bioactive compounds, total antioxidant activity (TAA) and microbial quality in slices of fresh-cut (FC) ‘Paluma’ guava coated with chitosan at 2% (Q), calcium chloride at 1% (CC), calcium chloride at 1% + sodium alginate at 1% (CC + A), calcium chloride at 1% + chitosan at 2% (CC + Q), and control (T - without coating). Coated slices were packed in trays, wrapped with PVC film and kept at 3 ± 1 °C and 75 ± 4% RH for 12 days and evaluated for ascorbic acid, lycopene, beta-carotene, total extractable polyphenols (TEP), and TAA by ABTS+- and DPPH . Ascorbic acid content of slices did not differ by coatings, but TEP was higher in slices coated with Q. The TAA by DPPH was higher in slices coated with Q, however, by ABTS + - it was higher in those coated with Q, CC and CC + Q. No thermotolerant coliforms or Salmonella were detected in FC guava from any treatment. However, slices coated with Q showed the lowest counts of total coliforms and molds and yeasts. Therefore, the application of Q coating provided microbiological safety to FC guava, still maintaining the levels of bioactive compounds and TAA superior to the control slices, which can characterize this as a healthy FC product, with superior functional potential.

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Author Biographies

Fernanda dos Santos Nunes de Melo, Universidade Federal de Paraíba

Dra, Graduate Program in Food Science and Technology, Center of Technology, Universidade Federal de Paraíba, UFPB, João Pessoa, PB, Brazil.

Silvanda de Melo Silva, Universidade Federal de Paraíba

Profa, Dra, Graduate Program in Agronomy, PPGAgro, Center of Agrarian Sciences, CCA UFPB, Areia, PB, Brazil.

Alex Sandro Bezerra de Sousa, Universidade Federal de Paraíba

Doctoral Student of the Graduate Program in Agronomy, PPGAgro, CCA, UFPB, Areia, PB, Brazil.

Antônio Augusto Marques Rodrigues, Universidade Federal de Paraíba

Dr., PPGAgro, CCA, UFPB, Areia, PB, Brazil.

Raylson de Sá Melo, Universidade Federal do Ceará

Doctoral Student of the Graduate Program in Agronomy, Universidade Federal do Ceará, UFC, Fortaleza, CE, Brazil

Renato Pereira Lima, Universidade Federal de Paraíba

Dr., PPGAgro, CCA, UFPB, Areia, PB, Brazil.

Mariany Cruz Alves da Silva, Universidade Federal de Paraíba

Dra, Graduate Program in Food Science and Technology, Center of Technology, Universidade Federal de Paraiba, UFPB, João Pessoa, PB, Brazil.

Eduardo Felipe da Silva Santos, Universidade Federal de Paraíba

MSc, PPGAgro, CCA, UFPB, Areia, PB, Brazil.

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Published

2021-05-20

How to Cite

Melo, F. dos S. N. de, Silva, S. de M., Sousa, A. S. B. de, Rodrigues, A. A. M., Melo, R. de S., Lima, R. P., … Santos, E. F. da S. (2021). Functional potential and food safety of fresh-cut ‘Paluma’ guava under edible coatings. Semina: Ciências Agrárias, 42(4), 2313–2326. https://doi.org/10.5433/1679-0359.2021v42n4p2313

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