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http://hdl.handle.net/10400.5/4456
Título: | Fresh-cut carrot (cv. Nantes) quality as affected by abiotic stress (heat shock and UV-C irradiation) pre-treatments |
Autor: | Alegria, Carla Pinheiro, Joaquina Duthoit, Margarida Gonçalves, Elisa M. Moldao-Martins, Margarida Abreu, Marta |
Palavras-chave: | abiotic stress heat shock UV-C radiation fresh-cut carrot quality |
Data: | 2012 |
Editora: | Elsevier |
Citação: | "LWT-Food Science and Technology". ISSN 0023-6438. 48 (2012). 197-203 |
Resumo: | Abiotic stresses such as heat shock and UV-C irradiation can be used to induce synthesis of bioactive compounds and to prevent decay in fresh-cut fruits and vegetables. This study aimed to evaluate the effects of heat shock and UV-C radiation stress treatments, applied in whole carrots, on the overall quality of fresh-cut carrot cv. Nantes during storage (5 C). Heat shock (HS, 100 C/45 s) and UV-C (0.78 0.36 kJ/m2) treated samples had higher phenolic content and exhibited reduced POD activities during storage when compared to control (Ctr) samples (200 mg/L free chlorine/1 min). All samples showed reduced carotenoid content considering raw material. Nonetheless, UV samples registered a three-fold increase in carotenoid content in subsequent storage. Fresh-cut carrot colour showed a continuous increase in whiteness index (WI) values during storage regardless of treatment without impairing visual quality. Respiratory metabolism was affected by both abiotic stress treatments since reduced O2/CO2 rates were found, more significant in HS samples. The decontamination effect was more expressive in HS samples, where a 2.5 Log10 cfu/g reduction in initial microbial load and reduced microbial growth were achieved |
Descrição: | Available at Sciverse ScienceDirect |
Peer review: | yes |
URI: | http://hdl.handle.net/10400.5/4456 |
ISSN: | 0023-6438 |
Versão do Editor: | www.elsevier.com/locate/wt |
Aparece nas colecções: | DCEB - Artigos de Revistas |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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REP-M.Moldao Martins-12.pdf | 437,75 kB | Adobe PDF | Ver/Abrir |
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