2010
DOI: 10.2202/1556-3758.1853
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Inactivation of Polyphenoloxidase of Pear by Pulsed Electric Fields

Abstract: Pulsed electric fields (PEF) were utilized for inhibition of polyphenoloxidase (PPO) of pear. The effects of PEF electric field strength, treatment time and the temperature on the reduction of PPO activity were evaluated in this study. A maximum of 95.5% inactivation of pear PPO was observed with the PEF treatment at 35 kV/cm for 1200 ?s at 40°C. The classical first-order inactivation as well as modified Hülsheger’s kinetic model adequately described the enzymatic inhibition in PEF processing. The second-order… Show more

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Cited by 14 publications
(6 citation statements)
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“…In a variety of liquid food processes, PEF treatment facilitated mass transfer, improved the diffusion of cellular liquids which improved food dehydration [ 5 ] and promoted extraction efficiency of functional compounds from food plants [ 6 ]. PEF was also utilized in fruit and vegetable processing to deactivate microorganisms [ 1 ], to reduce pesticide residues [ 7 ], and to inactivate enzymes [ 8 ].…”
Section: Introductionmentioning
confidence: 99%
“…In a variety of liquid food processes, PEF treatment facilitated mass transfer, improved the diffusion of cellular liquids which improved food dehydration [ 5 ] and promoted extraction efficiency of functional compounds from food plants [ 6 ]. PEF was also utilized in fruit and vegetable processing to deactivate microorganisms [ 1 ], to reduce pesticide residues [ 7 ], and to inactivate enzymes [ 8 ].…”
Section: Introductionmentioning
confidence: 99%
“…; Zhao et al . ). The main reason is assigned to the fact that liquid or semisolid foods are capable of quickly conducting electricity than solid foods.…”
Section: Nonthermal Processingmentioning
confidence: 97%
“…Zhao i wsp. [28] badali możliwości wykorzystania pulsacyjnego pola elektrycznego do inaktywacji polifenylooksydazy wyekstrahowanej z gruszki (in vitro). Maksymalną inaktywację, wynoszącą 95,5 %, stwierdzono w przypadku zastosowania prądu elektrycznego o natężeniu 35 kV/cm przez 1200 µs w temp.…”
Section: Mechanizm Elektropermeabilizacji I Wpływ Pola Elektrycznego unclassified