Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/84669
Título: | Evaluation of active LDPE films for packaging of fresh orange juice |
Autor(es): | Rodrigues, Pedro V. Vieira, Dalila Assunção Maia Martins, Paola Chaves Martins, Vilásia Guimarães Castro, Maria Cidália Rodrigues Machado, A. V. |
Palavras-chave: | Active packaging Orange juice Physicochemical characteristics Microbial stability Shelf-life |
Data: | 2023 |
Editora: | Multidisciplinary Digital Publishing Institute (MDPI) |
Revista: | Polymers |
Citação: | Rodrigues, P.V.; Vieira, D.M.; Martins, P.C.; Martins, V.G.; Castro, M.C.R.; Machado, A.V. Evaluation of Active LDPE Films for Packaging of Fresh Orange Juice. Polymers 2023, 15, 50. https://doi.org/10.3390/polym15010050 |
Resumo(s): | Microbial development, enzymatic action, and chemical reactions influence the quality of untreated natural orange juice, compromising its organoleptic characteristics and causing nutritional value loss. Active low-density polyethylene (LDPE) films containing green tea extract (GTE) were previously prepared by a blown film extrusion process. Small bags were prepared from the produced films, which were then filled with fresh orange juice and stored at 4 °C. Ascorbic acid (AA) content, sugar content, browning index, color parameters, pH, total acidity (TA) and microbial stability were evaluated after 3, 7, and 14 days of storage. The packaging containing GTE maintained the microbial load of fresh juice beneath the limit of microbial shelf-life (6 log CFU/mL) for the bacterial growth, with a more prominent effect for LDPE with 3%GTE. Regarding yeasts and molds, only the CO_LDPE_3GTE package maintained the microbial load of fresh juice below the limit for up to 14 days. At 14 days, the lowest levels of AA degradation (32.60 mg/100 mL of juice) and development of brown pigments (browning index = 0.139) were observed for the packages containing 3% of GTE, which had a pH of 3.87 and sugar content of 11.4 g/100 mL of juice at this time. Therefore, active LDPE films containing 3% of GTE increase the shelf-life of fresh juice and can be a promising option for storage of this food product while increasing sustainability. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/84669 |
DOI: | 10.3390/polym15010050 |
e-ISSN: | 2073-4360 |
Versão da editora: | https://www.mdpi.com/2073-4360/15/1/50 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | IPC - Artigos em revistas científicas internacionais com arbitragem |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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polymers-15-00050-v2.pdf | 909,36 kB | Adobe PDF | Ver/Abrir |
Este trabalho está licenciado sob uma Licença Creative Commons