Surface decontamination of white cheese by pulsed UV light treatment
JOURNAL OF FOOD SAFETY AND FOOD QUALITY-ARCHIV FUR LEBENSMITTELHYGIENE, cilt.71, sa.4, ss.86-92, 2020 (SCI-Expanded)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 71 Sayı: 4
- Basım Tarihi: 2020
- Doi Numarası: 10.2376/0003-925x-71-86
- Dergi Adı: JOURNAL OF FOOD SAFETY AND FOOD QUALITY-ARCHIV FUR LEBENSMITTELHYGIENE
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, PASCAL, Aquatic Science & Fisheries Abstracts (ASFA), CAB Abstracts, Food Science & Technology Abstracts, Veterinary Science Database
- Sayfa Sayıları: ss.86-92
- Sivas Cumhuriyet Üniversitesi Adresli: Evet
Özet
Surface contamination of cheese varieties with pathogenic microorganisms is a potential risk in dairy industry. Pulsed UV (PUV) light is a method, which provides rapid inactivation of a wide range of microorganisms on foods. In this study, white cheese inoculated on top surface with Staphylococcus aureus or Escherichia coli O157:H7 was exposed to PUV light. Treatment parameters were time (5, 15, 30, 45, 60 s) and distance from the quartz window of xenon lamp (5, 8, 13 cm). The 60 s-8 cm treatment (91.22 J/cm(2)) resulted in the highest inactivation level without visually altering the appearance of white cheese. After this treatment, approximately 1.31 and 2.20 log(10) reductions (cfu/cm(2)) were obtained for S. aureus and E. coli 0157:H7, respectively. Lipid oxidation, pH, and moisture content, except the color parameters, remained unchanged (p>0.05) after the 60 s-8 cm treatment. Only 1.75 % of the PUV light reached to a depth of 0.5 cm in white cheese after treatment at 5 cm. These findings indicate that although PUV light is able to reduce pathogen counts of white cheese, this technology can only be utilized for surface decontamination.