Isolation and identification of yeast species involved in cocoa shallow box fermentation
Research was performed to correlate sugar content, pH of pulps and nibs and temperature with the yeast species involved in cocoa fermentation process in Perak and Samarahan at different fermentation periods. The pH of pulps and nibs had an inversely proportional relationship where a decrement in the...
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| Format: | Final Year Project Report / IMRAD |
| Language: | English English |
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Universiti Malaysia Sarawak, (UNIMAS)
2012
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| Online Access: | http://ir.unimas.my/id/eprint/6199/ http://ir.unimas.my/id/eprint/6199/1/OOI%20TENG%20SIN.pdf http://ir.unimas.my/id/eprint/6199/4/OOI%20TENG%20SIN%20full.pdf |
| _version_ | 1848835860455227392 |
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| author | Ooi, Teng Sin |
| author_facet | Ooi, Teng Sin |
| author_sort | Ooi, Teng Sin |
| building | UNIMAS Institutional Repository |
| collection | Online Access |
| description | Research was performed to correlate sugar content, pH of pulps and nibs and temperature with the yeast species involved in cocoa fermentation process in Perak and Samarahan at different fermentation periods. The pH of pulps and nibs had an inversely proportional relationship where a decrement in the pH of pulps would cause an increment in the pH of nibs. The temperature at both areas had shown the same pattern where the highest temperature was stated at the 72 hours fermentation period and fluctuated after that as a result of turning of cocoa bean process. The sugar content of the Perak samples was initially high but decreased to 5.1 Brix at the end of fermentation due to microorganism reaction. The sugar content of the Samarahan samples was initially low but increased to 6.5 Brix at the end of cocoa fermentation process due to pectinolytic activity. 21 yeast isolates were isolated from both places. Four yeast isolates were managed to be sequenced and two species were identified as Candida krusei and Pichia anomala. Further identification using PCR molecular technique need to be carried out to identify and find out more about different types of yeast species involved at different cocoa fermentation periods. |
| first_indexed | 2025-11-15T06:14:35Z |
| format | Final Year Project Report / IMRAD |
| id | unimas-6199 |
| institution | Universiti Malaysia Sarawak |
| institution_category | Local University |
| language | English English |
| last_indexed | 2025-11-15T06:14:35Z |
| publishDate | 2012 |
| publisher | Universiti Malaysia Sarawak, (UNIMAS) |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | unimas-61992024-02-21T01:55:40Z http://ir.unimas.my/id/eprint/6199/ Isolation and identification of yeast species involved in cocoa shallow box fermentation Ooi, Teng Sin GE Environmental Sciences QD Chemistry SB Plant culture Research was performed to correlate sugar content, pH of pulps and nibs and temperature with the yeast species involved in cocoa fermentation process in Perak and Samarahan at different fermentation periods. The pH of pulps and nibs had an inversely proportional relationship where a decrement in the pH of pulps would cause an increment in the pH of nibs. The temperature at both areas had shown the same pattern where the highest temperature was stated at the 72 hours fermentation period and fluctuated after that as a result of turning of cocoa bean process. The sugar content of the Perak samples was initially high but decreased to 5.1 Brix at the end of fermentation due to microorganism reaction. The sugar content of the Samarahan samples was initially low but increased to 6.5 Brix at the end of cocoa fermentation process due to pectinolytic activity. 21 yeast isolates were isolated from both places. Four yeast isolates were managed to be sequenced and two species were identified as Candida krusei and Pichia anomala. Further identification using PCR molecular technique need to be carried out to identify and find out more about different types of yeast species involved at different cocoa fermentation periods. Universiti Malaysia Sarawak, (UNIMAS) 2012 Final Year Project Report / IMRAD NonPeerReviewed text en http://ir.unimas.my/id/eprint/6199/1/OOI%20TENG%20SIN.pdf text en http://ir.unimas.my/id/eprint/6199/4/OOI%20TENG%20SIN%20full.pdf Ooi, Teng Sin (2012) Isolation and identification of yeast species involved in cocoa shallow box fermentation. [Final Year Project Report / IMRAD] (Unpublished) |
| spellingShingle | GE Environmental Sciences QD Chemistry SB Plant culture Ooi, Teng Sin Isolation and identification of yeast species involved in cocoa shallow box fermentation |
| title | Isolation and identification of yeast species involved in cocoa shallow box fermentation |
| title_full | Isolation and identification of yeast species involved in cocoa shallow box fermentation |
| title_fullStr | Isolation and identification of yeast species involved in cocoa shallow box fermentation |
| title_full_unstemmed | Isolation and identification of yeast species involved in cocoa shallow box fermentation |
| title_short | Isolation and identification of yeast species involved in cocoa shallow box fermentation |
| title_sort | isolation and identification of yeast species involved in cocoa shallow box fermentation |
| topic | GE Environmental Sciences QD Chemistry SB Plant culture |
| url | http://ir.unimas.my/id/eprint/6199/ http://ir.unimas.my/id/eprint/6199/1/OOI%20TENG%20SIN.pdf http://ir.unimas.my/id/eprint/6199/4/OOI%20TENG%20SIN%20full.pdf |