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author:

Liu, Qin (Liu, Qin.) [1] | Jin, Xiaoxuan (Jin, Xiaoxuan.) [2] | Feng, Xiao (Feng, Xiao.) [3] | Yang, Hongshun (Yang, Hongshun.) [4] | Fu, Caili (Fu, Caili.) [5]

Indexed by:

Scopus SCIE

Abstract:

In the present study, the synergistic disinfection efficacy of low concentration electrolyzed water (LcEW) (free available chlorine, 4 mg/L) combined with brief heat enhancement was evaluated and the bactericidal mechanism was investigated by atomic force microscopy (AFM). The inactivation kinetics of Escherichia coil O157:H7 and Salmonella Typhimurium on organic carrot were fitted with Weibull model to evaluate the synergistic effects. LcEW is effective at inactivating E. coli O157:H7 and S. Typhimurium on organic carrots, and the efficacy is dependent on the temperature. The combined treatment with LcEW at 80 degrees C resulted in decimal reduction time (T-R) of 7.42 and 3.27 s for E. coli O157:H7 and S. Typhimurium, respectively. The reactive oxygen species generated from LcEW were responsible for the microbial inactivation. In addition, AFM observation of E. col O157:H7 and S. Typhimurium revealed morphological alterations in the bacterial cell structure, which illustrated the damage of cell membrane injury and intracellular component leakage. Quality attributes of carrot treated with LcEW and short-time heating (70 degrees C, 1 min) were not significantly different from controls. Compared to the control group, the combined treatment exhibited significantly (P < 0.05) greater inhibition of naturally occurring microbiota on organic carrots during storage at 4 degrees C. Consequently, the application of LcEW combined with short-time heat improved safety of organic carrot, without negatively affecting the sensory properties, which can be explored by the organic industry.

Keyword:

Atomic force microscopy Carrot Electrolysed water Electrolyzed oxidizing water Electrolyzed water Escherichia coli O157:H7 Food nanotechnology Fresh-cut Fresh produce Heat treatment Minimal processing Modelling Organic food Organic vegetable Pathogen Postharvest Prediction Salmonella Typhimurium Sanitation Weibull model

Community:

  • [ 1 ] [Liu, Qin]Natl Univ Singapore, Food Sci & Technol Programme, Dept Chem, Singapore 117543, Singapore
  • [ 2 ] [Jin, Xiaoxuan]Natl Univ Singapore, Food Sci & Technol Programme, Dept Chem, Singapore 117543, Singapore
  • [ 3 ] [Feng, Xiao]Natl Univ Singapore, Food Sci & Technol Programme, Dept Chem, Singapore 117543, Singapore
  • [ 4 ] [Yang, Hongshun]Natl Univ Singapore, Food Sci & Technol Programme, Dept Chem, Singapore 117543, Singapore
  • [ 5 ] [Liu, Qin]Natl Univ Singapore, Suzhou Res Inst, 377 Lin Quan St,Suzhou Ind Pk, Suzhou 215123, Jiangsu, Peoples R China
  • [ 6 ] [Jin, Xiaoxuan]Natl Univ Singapore, Suzhou Res Inst, 377 Lin Quan St,Suzhou Ind Pk, Suzhou 215123, Jiangsu, Peoples R China
  • [ 7 ] [Feng, Xiao]Natl Univ Singapore, Suzhou Res Inst, 377 Lin Quan St,Suzhou Ind Pk, Suzhou 215123, Jiangsu, Peoples R China
  • [ 8 ] [Yang, Hongshun]Natl Univ Singapore, Suzhou Res Inst, 377 Lin Quan St,Suzhou Ind Pk, Suzhou 215123, Jiangsu, Peoples R China
  • [ 9 ] [Fu, Caili]Fuzhou Univ, Coll Biol Sci & Technol, Fuzhou 350108, Fujian, Peoples R China
  • [ 10 ] [Fu, Caili]Changzhou Qihui Management & Consulting Co Ltd, Changzhou 213000, Jiangsu, Peoples R China

Reprint 's Address:

  • [Yang, Hongshun]Natl Univ Singapore, Food Sci & Technol Programme, Dept Chem, Singapore 117543, Singapore

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Source :

FOOD CONTROL

ISSN: 0956-7135

Year: 2019

Volume: 106

4 . 2 5 8

JCR@2019

5 . 6 0 0

JCR@2023

ESI Discipline: AGRICULTURAL SCIENCES;

ESI HC Threshold:133

CAS Journal Grade:1

Cited Count:

WoS CC Cited Count: 46

SCOPUS Cited Count: 54

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 4

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