Sürdürülebilir Kalkınma Amaçları

• 2
• 1
• 1

• MakaleAçık Erişim2024Scopus SJRQ2/r/munzur/2302
  Modeling the growth behavior of Salmonella spp. in grated carrots inoculated with different inoculum levels stored at various temperatures

  Omac, Basri

  The consumption of fresh and fresh-cut fruits and vegetables, such as carrots, has increased for the last decades for a healthy life and an adequate diet, but concerns regarding the microbial safety of them have been raised. The present study was conducted to develop predictive models for Salmonella spp. in grated carrots. The results showed that Salmonella spp. did not display growth at 5°C, but it grew in grated carrots at other temperatures (10, 15, 20, 25, and 37°C) for both inoculum levels. Also, the inoculum levels affected the growth of this pathogen in grated carrots when the storage temperatures ranged from 15 to 25°C. The theoretical minimum temperatures calculated using the Huang model were 3.48 and 5.79°C for inoculum levels of 101 and 102 CFU/g, respectively. The primary and secondary models performed well in terms of agreement between experimental and estimated values. Furthermore, compared to the Ratkowsky model, the theoretical minimum temperature was given a more reasonable value using the Huang model. The models developed in the present study will be a useful input for future quantitative microbial risk assessment to appraise the proliferation of Salmonella spp. in grated carrots throughout the production process, storage, and distribution.

  • 
  • 
  AtıfScopus4·WoS4·OpenAlex5

  İncele
• MakaleYalnız künye2022Scopus SJRQ2/r/munzur/2650
  Integration of electron beam technology into fresh produce wash water line: Effect of inoculum suspension medium and water quality parameters on the radioresistance of Salmonella Typhimurium ATCC 13311

  Omac, Basri; Moreira, Rosana G.; Castell-Perez, Elena

  Electron beam technology may be integrated into the fresh produce wash water line, as an advanced oxidation process (AOP). However, prior to implementation, effectiveness of the technology must be assessed. Hydroxyl radical scavengers were used to quantify the role of yield of hydroxyl radicals in inactivation of the selected pathogen in aqueous solution. The combined lethal effect of e-beam treatment with aqueous hydrogen peroxide (H2O2) solution was also investigated. The radioresistance of Salmonella Typhimurium ATCC 13311 in deionized (DI) water, that is radiation D10 values, increased (p <.05) from 0.15 ± 0.00 kGy to 0.18 ± 0.00 kGy and to 0.19 ± 0.06 kGy when peptone water (PW) and phosphate buffered saline (PBS) was dissolved into DI water, respectively. Membrane-permeable ethanol provided better protection for this pathogen than nonpermeable PEG. Results suggest that to minimize the protective effects of inoculating suspending media used for the preparation of Salmonella suspension, 1.0 mM phosphate buffer (PB) should be used in microbial studies of irradiated foods. Nitrate and dissolved organic carbon (DOC) reacting with hydrated electrons (eaq−) and hydroxyl radicals (·OH), respectively, induced more sequestering of ·OH. E-beam treatment with 0.60 kGy dose in aqueous solution with H2O2 led to a reduction of 6.44 ± 0.03 log CFU/mL f S. Typhimurium ATCC 13311.

  • 
  • 
  AtıfScopus3·WoS3·OpenAlex3

  İncele