SURVIVAL OF MICROORGANISMS IN GALACTOOLIGOSACCHARIDE STORED AT VARIOUS TEMPERATURES
- Authors
- Bang, Jihyun; Choi, Seonyeong; Kim, Hoikyung; Ryu, Jee-Hoon
- Issue Date
- 2월-2014
- Publisher
- WILEY
- Citation
- JOURNAL OF FOOD SAFETY, v.34, no.1, pp.50 - 56
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF FOOD SAFETY
- Volume
- 34
- Number
- 1
- Start Page
- 50
- End Page
- 56
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/99469
- DOI
- 10.1111/jfs.12094
- ISSN
- 0149-6085
- Abstract
- Food-grade galactooligosaccharide (GOS) has a low water activity (a(w)). We investigated the survival of Escherichia coli, Salmonella spp., Pseudomonas aeruginosa, Listeria monocytogenes, Staphylococcus aureus, Aspergillus flavus and Saccharomyces cerevisiae in GOS as affected by inoculum levels and storage temperatures. The five bacteria (inoculated at 3 or 6logcfu/g), and the fungus A.flavus (3logcfu/g) and S.cerevisiae (3logcfu/g), were inoculated into GOS and the material stored at 4, 22 or 50C for 28 days. When ca. 6logcfu/g of microorganisms were inoculated into GOS, the final numbers of L.monocytogenes and S.aureus (thus after 28 days of storage) were higher than those of E.coli, Salmonella spp. and P.aeruginosa, at all storage temperatures tested. In GOS inoculated with ca. 3logcfu/g of microorganisms, A.flavus numbers were the highest after 28 days. S.cerevisiae levels were lower than those of gram-positive but higher than those of gram-negative bacteria. The overall level of survival by temperature was 4C>22C>50C, regardless of inoculum level. Thus, microbial survival in low-a(w) GOS was affected by temperature and inoculum level but the microorganisms did not grow during the storage. Practical ApplicationsThis study showed that survival of microorganisms in GOS was affected by storage temperature and inoculum level. Microorganisms did not grow in GOS at all temperatures tested, but they still survived in GOS for up to 28 days upon storage temperature. This information will be useful in development of effective microbiological safety strategies to be incorporated in preparation or storage of low-a(w) food and food ingredients.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - Graduate School > Department of Biotechnology > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.