View Article |
Rapid microbial detection model system in uht milk products using poly (l-lactic acid) (plla) thin film
Nurul Hidayah Yusof1, Norrakiah Abdullah Sani2, Farah Hannan Anuar3, Mohd Suzeren Jamil4, Saiful Irwan Zubairi5.
Ultra-high temperature is a process that involves heating of milk to a very high temperature to produce sterile milk products.
However, food poisoning due to consumption of UHT milk still happen in Malaysia. This study was done to develop a
film that is made by poly(L-lactic acid) (PLLA) to detect the presence of microorganisms in UHT milk products. UHT milk
that was used in this study was full cream milk. Contaminated milk that contained Bacillus cereus was made to conduct
a model system on the relationship between colony forming unit of microorganisms and contact angle. Contaminated
milk was also used as a control sample to study the difference of milk properties between fresh and contaminated milk.
Physicochemical analysis (Brix, colour, pH and contact angle) and microbiological analysis (total plate count) were
done to UHT milk sample as soon as the packaging of the milk was unsealed. Analysis was done with 30 min time interval
until 4 h and 30 min since the unsealing of packaging. The results showed that presence of microorganisms in UHT milk
was detected after the milk product was unsealed and exposed to environment for 3 h and 30 min. Contact angle resulted
from the presence of microorganisms in UHT milk was 64.34 - 65.44° with its colony forming unit, 2.1 – 3.9 cfu/mL.
Therefore, the potential usage of contact angle on PLLA thin film with respect to colony forming unit (cfu) in detecting
the presence of microorganisms in UHT milk product was attained and well modelled.
Affiliation:
- Universiti Kebangsaan Malaysia, Malaysia
- Universiti Kebangsaan Malaysia, Malaysia
- Universiti Kebangsaan Malaysia, Malaysia
- Universiti Kebangsaan Malaysia, Malaysia
- Universiti Kebangsaan Malaysia, Malaysia
Toggle translation
|
|
Indexation |
Indexed by |
MyJurnal (2021) |
H-Index
|
6 |
Immediacy Index
|
0.000 |
Rank |
0 |
Indexed by |
Web of Science (SCIE - Science Citation Index Expanded) |
Impact Factor
|
JCR (1.009) |
Rank |
Q4 (Multidisciplinary Sciences) |
Additional Information |
JCI (0.15) |
Indexed by |
Scopus 2020 |
Impact Factor
|
CiteScore (1.4) |
Rank |
Q2 (Multidisciplinary) |
Additional Information |
SJR (0.251) |
|
|
|