Effects of pH, temperature, and pre-pulsed electric field treatment on pulsed electric field and heat inactivation of Escherichia coli O157:H7
Yükleniyor...
Tarih
2003
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Int Assoc Food Protection
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
This investigation was undertaken to study the inactivation of Escherichia coli O157:H7 by pulsed electric field (PEF) treatment and heat treatment after exposure to different stresses. E. coli O157:H7 cells exposed to different pHs (3.6, 5.2, and 7.0 for 6 h), different temperatures (4, 35, and 40degreesC for 6 h), and different pre-PEF treatments (10, 15, and 20 kV/cm) were treated with PEFs (20, 25, and 30 kV/cm) or heat (60degreesC for 3 min). The results of these experiments demonstrated that a pH of 3.6 and temperatures of 4 and 40degreesC caused significant decreases in the inactivation of E. coli O157:H7 by PEF treatment and heat treatment (P < 0.05). Pre-PEF treatments, pHs of 5.2 and 7.0, and a temperature of 35degreesC, on the other hand,did not result in any resistance of E. coli O157:H7 cells to inactivation by PEF treatment and heat treatment (P > 0.05).
Açıklama
Anahtar Kelimeler
Listeria-Monocytogenes, Acid Adaptation, Salmonella-Typhimurium, Environmental Stresses, Growth Atmosphere, Cross-Protection, Resistance, Shock, Tolerance, Survival
Kaynak
Journal of Food Protection
WoS Q Değeri
Q1
Scopus Q Değeri
Q2
Cilt
66
Sayı
5
