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Títol:
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Changes of health-related compounds throughout cold storage of tomato juice stabilized by thermal or high intensity pulsed electric field treatments
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Autor/a:
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Odriozola Serrano, Isabel; Soliva-Fortuny, Robert; Martín Belloso, Olga
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Notes:
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The effect of high intensity pulsed electric fields (HIPEF) processing (35 kV/cm for 1500 μs in bipolar 4-μs pulses at 100 Hz, with an energy
density of 8269 kJ/L) on the main bioactive compounds and antioxidant capacity of tomato juice was investigated and compared to heat
pasteurization (90 °C for 1 min or 30 s) having the fresh juice as a reference. HIPEF and heat treated tomato juices showed higher lycopene and
lower vitamin C levels than the untreated juice. However, no significant changes in the total phenolic content and antioxidant capacity were
observed between treated and fresh juices just after processing. Lycopene, vitamin C and antioxidant capacity of both treated and untreated juices
decreased exponentially during storage following a first order kinetics (R2= 0.763–0.987), whereas tomato juices maintained their initial phenolic
content. HIPEF-treated tomato juice maintained higher lycopene and vitamin C content than the thermally treated juices during the storage time.
Hence, the application of HIPEF may be appropriate to achieve nutritious and fresh like tomato juice.
This study has been carried out with financial support from the Commission of the European Communities, Framework 6, Priority 5 'Food Quality and Safety', Integrated Project NovelQ FP6-CT-2006-015710.This work was also supported by the Interministerial Commission for Science and Technology (CICYT) of the Ministerio de Educación y Ciencia (Spain) through the Project ALI 2005-05768. Isabel Odriozola-Serrano thanks the Agència de Gestió d'Ajuts Universitaris i de Recerca of the Generalitat de Catalunya (Spain) and the European Social Fund for the predoctoral grant. |
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Matèries:
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-Thermal treatment
-High intensity pulsed electric fields
-Tomato juice
-Bioactive compounds |
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Drets:
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(c) Elsevier, 2008
info:eu-repo/semantics/restrictedAccess |
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Tipus de document:
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article
publishedVersion |
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Publicat per:
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Elsevier
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Compartir:
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