Microbial populations, sensory, and volatile compounds profiling of local cooked rice
Objectives This study is designed to investigate the microbial populations, sensory, and volatile compounds profiling of locally cooked rice stored at room temperature (30 °C) on days 0, 1, 2, and 3 (D0, D1, D2, and D3) for the determination of specific spoilage organisms (SSOs)....
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
2023
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| Online Access: | http://psasir.upm.edu.my/id/eprint/112127/ http://psasir.upm.edu.my/id/eprint/112127/1/fyad065.pdf |
| _version_ | 1848865864789524480 |
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| author | Mohammad Sabri, Nur-Shahera Mahyudin, Nor Ainy Abdullah Sani, Muhammad Shirwan Han, Ming Gan Chong, Kah Hui Padmanabhan, Kousalya Shan, Jiang Mahmud Ab Rashid, Nor Khaizura |
| author_facet | Mohammad Sabri, Nur-Shahera Mahyudin, Nor Ainy Abdullah Sani, Muhammad Shirwan Han, Ming Gan Chong, Kah Hui Padmanabhan, Kousalya Shan, Jiang Mahmud Ab Rashid, Nor Khaizura |
| author_sort | Mohammad Sabri, Nur-Shahera |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | Objectives
This study is designed to investigate the microbial populations, sensory, and volatile compounds profiling of locally cooked rice stored at room temperature (30 °C) on days 0, 1, 2, and 3 (D0, D1, D2, and D3) for the determination of specific spoilage organisms (SSOs).
Materials and Methods
Microbiological, physicochemical, sensory evaluation, and volatile organic compounds (VOCs) analyses were conducted for samples of cooked rice stored at room temperature on days 0, 1, 2, and 3. SSO of cooked rice was then identified by linking present organisms with the changes occurring throughout the storage period.
Results
Microbiological analysis revealed the presence of spore-forming bacteria, yeast, and moulds, which survived the cooking process. While total viable count exceeded the microbiological limit at 6.90 log CFU/g on D3, panellists deemed cooked rice unacceptable for consumption on D2 at a total sensory score of 11.00, which indicates that D2 was the day cooked rice spoiled. Through culture-dependent and culture-independent methods, Bacillus cereus was identified as the sole bacteria observed throughout the storage period, confirming that the bacteria were SSOs. The VOC analysis proposed several metabolites, 3-eicosene, 1-heptadecene, hexacosane, phenol, 4,4ʹ-(1-methylethylidene)bis-, n-nonadecanol-1, and cyclohexanone, as potential spoilage markers of cooked rice.
Conclusions
B. cereus is confirmed to be the SSO of cooked rice, in which spoilage occured after 48 h of storage at room temperature. The organoleptic rejection in cooked rice was shown to be linked to the production of various compounds by B. cereus which could be proposed as potential spoilage markers for cooked rice. |
| first_indexed | 2025-11-15T14:11:29Z |
| format | Article |
| id | upm-112127 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T14:11:29Z |
| publishDate | 2023 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-1121272024-10-23T03:04:38Z http://psasir.upm.edu.my/id/eprint/112127/ Microbial populations, sensory, and volatile compounds profiling of local cooked rice Mohammad Sabri, Nur-Shahera Mahyudin, Nor Ainy Abdullah Sani, Muhammad Shirwan Han, Ming Gan Chong, Kah Hui Padmanabhan, Kousalya Shan, Jiang Mahmud Ab Rashid, Nor Khaizura Objectives This study is designed to investigate the microbial populations, sensory, and volatile compounds profiling of locally cooked rice stored at room temperature (30 °C) on days 0, 1, 2, and 3 (D0, D1, D2, and D3) for the determination of specific spoilage organisms (SSOs). Materials and Methods Microbiological, physicochemical, sensory evaluation, and volatile organic compounds (VOCs) analyses were conducted for samples of cooked rice stored at room temperature on days 0, 1, 2, and 3. SSO of cooked rice was then identified by linking present organisms with the changes occurring throughout the storage period. Results Microbiological analysis revealed the presence of spore-forming bacteria, yeast, and moulds, which survived the cooking process. While total viable count exceeded the microbiological limit at 6.90 log CFU/g on D3, panellists deemed cooked rice unacceptable for consumption on D2 at a total sensory score of 11.00, which indicates that D2 was the day cooked rice spoiled. Through culture-dependent and culture-independent methods, Bacillus cereus was identified as the sole bacteria observed throughout the storage period, confirming that the bacteria were SSOs. The VOC analysis proposed several metabolites, 3-eicosene, 1-heptadecene, hexacosane, phenol, 4,4ʹ-(1-methylethylidene)bis-, n-nonadecanol-1, and cyclohexanone, as potential spoilage markers of cooked rice. Conclusions B. cereus is confirmed to be the SSO of cooked rice, in which spoilage occured after 48 h of storage at room temperature. The organoleptic rejection in cooked rice was shown to be linked to the production of various compounds by B. cereus which could be proposed as potential spoilage markers for cooked rice. 2023 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/112127/1/fyad065.pdf Mohammad Sabri, Nur-Shahera and Mahyudin, Nor Ainy and Abdullah Sani, Muhammad Shirwan and Han, Ming Gan and Chong, Kah Hui and Padmanabhan, Kousalya and Shan, Jiang and Mahmud Ab Rashid, Nor Khaizura (2023) Microbial populations, sensory, and volatile compounds profiling of local cooked rice. Food Quality and Safety, 8. pp. 1-12. ISSN 2399-1399; ESSN: 2399-1402 https://academic.oup.com/fqs/article/doi/10.1093/fqsafe/fyad065/7469338?login=true 10.1093/fqsafe/fyad065 |
| spellingShingle | Mohammad Sabri, Nur-Shahera Mahyudin, Nor Ainy Abdullah Sani, Muhammad Shirwan Han, Ming Gan Chong, Kah Hui Padmanabhan, Kousalya Shan, Jiang Mahmud Ab Rashid, Nor Khaizura Microbial populations, sensory, and volatile compounds profiling of local cooked rice |
| title | Microbial populations, sensory, and volatile compounds profiling of local cooked rice |
| title_full | Microbial populations, sensory, and volatile compounds profiling of local cooked rice |
| title_fullStr | Microbial populations, sensory, and volatile compounds profiling of local cooked rice |
| title_full_unstemmed | Microbial populations, sensory, and volatile compounds profiling of local cooked rice |
| title_short | Microbial populations, sensory, and volatile compounds profiling of local cooked rice |
| title_sort | microbial populations, sensory, and volatile compounds profiling of local cooked rice |
| url | http://psasir.upm.edu.my/id/eprint/112127/ http://psasir.upm.edu.my/id/eprint/112127/ http://psasir.upm.edu.my/id/eprint/112127/ http://psasir.upm.edu.my/id/eprint/112127/1/fyad065.pdf |