SciELO - Scientific Electronic Library Online

 
vol.41 número6Predição da energia metabolizável do milho de primeira e segunda safra para leitõesExtração assistida por microondas para frutos da espécie andina Vaccinium meridionale: Condições experimentais na remoção de polifenóis totais índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados

Journal

Artigo

Indicadores

Links relacionados

Compartilhar


Ciência e Agrotecnologia

versão impressa ISSN 1413-7054versão On-line ISSN 1981-1829

Resumo

FERREIRA, Wallas Felippe de Souza et al. Influence of pH on the efficacy of ozonated water to control microorganisms and its effect on the quality of stored strawberries (Fragaria x ananassa Duch.). Ciênc. agrotec. [online]. 2017, vol.41, n.6, pp.692-700. ISSN 1413-7054.  https://doi.org/10.1590/1413-70542017416013317.

Ozonation has been proposed as an alternative for the post-harvest treatment of plant products. Therefore, the objective of this study was to evaluate the influence of the pH on the efficacy of ozonated water to control microorganisms and to determine the possible effects of ozone on the quality of stored strawberries. To evaluate the influence of pH on ozonated water in Portola variety strawberries, the strawberries were divided into six batches. Three batches were exposed to ozonated water and three batches were exposed to non-ozonized water with different pH levels and an immersion time of 5 min. The pH values used were 3.0, 6.5 and 8.7. After the ozonation, the fruits were stored in a cold chamber at 5 °C for 6 days, and analyses were performed every two days. A completely randomized design was adopted using a 6x4 factorial scheme with three replications. The aerobic mesophiles, molds and yeasts, total coliforms and Escherichia coli were quantified, and the presence of Salmonella spp. was assessed. For the quality evaluation, the mass loss, titratable acidity (TA), pH, soluble solids (SS), SS/TA ratio and color were analyzed. The pH of the water was verified to influenced the effectiveness of the ozonated water to control the aerobic mesophiles and molds and yeasts. The ozonated water can retard fresh mass losses and maintain the pH, soluble solids, titratable acidity, SS/TA ratio and color variables.

Palavras-chave : Ozone; microbiological quality; qualitative changes.

        · resumo em Português     · texto em Inglês     · Inglês ( pdf )