علوم وتكنولوجيا الأغذية 73 (2016): 615-621

المُلخص:

Slightly acid electrolyzed water (SAcEW) and ultrasound (US) treatment have emerged as an environmental-friendly antimicrobial agent. However, SAcEW treatment alone shows low antimicrobial efficiency. Therefore, the aim of this study was to develop a hurdle approach that combined SAcEW and US to improve the antimicrobial effect against Bacillus cereus as well as inhibition of the growth on potato. US treatment under different conditions of dip times, acoustic energy densities (AED) and temperatures were conducted to obtain the optimal condition. Our findings demonstrate that 3 min of US with 400 W/L of AED at 40 C treatment (US 40 C) significantly (p 0.05) reduced B. cereus population by 2.3 0.1 log CFU/g with minimal change in the color of potato. In addition, 3 min of SAcEW (pH, 5.35.5 ORP, 958981 mV ACC, 2830 mg/L) simultaneous with US40 C treatment (SAcEW US40 C) an approximately 3.0 log CFU/g reduction in B. cereus. Furthermore, SAcEW US40 C treatment efficiently extended lag time of B. cereus by 0.210.5 hrs, reduced that of specific growth rate by 0.010.23 log CFU/h during storage at different temperatures from 5 to 35 C. Therefore, this combined hurdle technology is capable of improving microbial safety of potato during storage and distribution.

التقرير:

https://www.sciencedirect.com/science/article/pii/S0023643816302006