Single- and multi-cycle high hydrostatic pressure treatment on microbiological quality of mud snail (Bullacta exarata) during refrigerated storage |
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| Affiliation: | 1. School of Computer and Information Science, Hubei Engineering University, Xiaogan 432000, China;2. School of Electronic Engineering, Xidian University, Xi׳an 710071, China;1. Commonwealth Scientific and Industrial Research Organisation, Food and Nutrition, 671 Sneydes Road, Private Bag 16, Werribee, VIC 3030, Australia;2. Commonwealth Scientific and Industrial Research Organisation, Australian Animal Health Laboratory, 5 Portarlington Road, Geelong, VIC 3220, Australia;1. Beijing Key Laboratory of Functional Food from Plant Resources, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, People’s Republic of China;2. Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, People’s Republic of China;3. Institute of Apicultural Research, Chinese Academy of Agricultural Sciences, Beijing 100083, People’s Republic of China;4. Beijing Weifengyongzhu Technology Developing Co., Ltd., District A, Beijing 100020, People’s Republic of China;5. Pingyuan County Weifengyongzhu Technology Co., Ltd., Shandong Province, Dezhou City 252100, People’s Republic of China;1. Institute of Geophysics, Czech Academy of Sciences, v. v. i., Boční II 1401, 14131 Prague, Czech Republic;2. Charles University in Prague, Faculty of Mathematics and Physics Ke Karlovu 3, 121 16 Prague, Czech Republic;3. Institute of Geophysics, Polish Academy of Sciences, Księcia Janusza 64, 01–452 Warsaw, Poland;1. Faculdade de Agronomia e Medicina Veterinária, Universidade de Brasília, Brasília, DF, Brazil;2. Embrapa Recursos Genéticos e Biotecnologia, Brasilia, DF, Brazil;3. Embrapa Caprinos e Ovinos, Sobral, Ceará, Brazil;4. CNPq Fellow, Brazil;5. Vice coordinator of INCT-Pecuária, Faculdade de Agronomia e Medicina Veterinária, Universidade de Brasília, Brasília, DF,, Brazil;6. Embrapa Secretaria de Relações Internacionais, Embrapa Labex EUA, Brasília, DF, 70770-901, Brazil |
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| Abstract: | High hydrostatic pressure (HHP) processing is an industrial technology used for preservation of a wide range of food products, and vacumm-packed mud snails (Bullacta exarata) were HHP processed to ensure food safety and shelf-life stability. The effects of single- and multi-cycle HHP treatment, especially the combination of different intensities, on the microbial behavior and shelf-life extension of B. exarata during subsequent storage were investigated. Total microbial count, psychrophilic microorganisms, Clostridium bacteria, total Enterobacteriaceae and H2S-producing bacteria were enumerated during subsequent refrigerated storage, and Gompertz model was chosen to predict the shelf-life, growth rate, lag time and generation time. The results showed that the initial microbial load was obviously reduced as the pressure increased. Total Enterobacteriaceae and H2S-producing bacteria were not detected in multi-cycle HHP processing during refrigerated storage. Moreover, multi-cycle HHP method (B + F) could improve the shelf-life of B. exarata for more than 38 days. The model indicated that the lag time for Clostridium bacteria processed with multi-cycle HHP (B + F) was extended to 24.65 days. Our findings will be of aid for the establishment of general process guidelines, and demonstrated that multi-cycle HHP technology has potential for application in mud snail preservation and processing. |
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| Keywords: | Mud snail Multi-cycle high hydrostatic pressure Refrigerated storage Microbiology Gompertz equation |
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