RT info:eu-repo/semantics/conferenceObject
T1 Effect of high pressure carbon dioxide (HPCD) treatment on enzyme inactivation and other properties of tomato juice
A1 Trigueros Andrés, Ester
A1 Illera Gigante, Alba Ester
A1 Sanz Díez, Mª Teresa
A1 Melgosa Gómez, Rodrigo
A1 García Solaesa, Ángela
A1 Beltrán Calvo, Sagrario
K1 Ingeniería química
K1 Chemical engineering
AB Among the recent non-thermal technologies developed, HPCD treatment has been shown to be effective for the inactivation of microorganisms and enzymes avoiding food exposure tothe adverse effects of high temperatures. Processing of tomato juice can result in amodification of its consistency and a decrease of its viscosity due to the activity of enzymessuch as pectinmethylesterase (PME), polygalacturonase (PG). Peroxidase (POD) catalyzesoxidation reactions related to the production of undesirable flavours and colours. The mainobjective of this work was to study the effect of the HPCD technology on tomato juice. Theinfluence of HPCD process parameters such as pressure (8.5 - 20 MPa) and temperature (35 and 45 ºC) on the inactivation kinetics of PME, PG and POD and physical parameters such aspH and particle size distribution was evaluated. Results showed that increasing pressure andtemperature decreased the residual activity of the enzymes evaluated. The results obtainedshowed a higher efficiency of the HPCD technology regarding the high pressure processing(HPP) technology since the pressure required to achieve enzymatic inactivation by HPCD (8.5– 20 MPa) are well below the pressure required by HPP (600-800 MPa) for the same purpose.HPCD technology uses much softer processing conditions that modify the tomato juice to alesser extent and achieve a greater degree of enzymatic inactivation. The tomato juice pHvalue (4.1 ± 0.1) did not change significantly (p ≤ 0.05) before and after HPCD treatment.The particle size distribution (PSD) of the tomato juice was bimodal, with a particle diameterthat shifted towards lower sizes after HPCD treatment, indicating that homogenization isfavoured by this treatment.
YR 2017
FD 2017
LK http://hdl.handle.net/10259/4579
UL http://hdl.handle.net/10259/4579
LA eng
NO Ponencia presentada en: 16th European Meeting   on Supercritical Fluids, 25 a 28 de abril de 2017, Lisboa
NO (MINECO) and the European Regional Development Fund(ERDF) for financial support of project CTQ2015-64396-R and AEI’s contract. To MINECOfor RM’s pre-doctoral contract (BES-2013-063937).
DS Repositorio Institucional de la Universidad de Burgos
RD 25-abr-2024