Hằng Nguyễn Thị will give a lecture at Matís, room 312, Vínlandsleið 12, on Friday 26 January at 11 am. Its project is called: The effect of packaging methods and storage temperature on the quality of cobia (Rachycentron canadum) fillets in cold stores.
The English name is: "Effects of packaging methods and storage temperature on the quality of Cobia (Rachycentron canadum) fillets during frozen storage"
The aim of this project was to study the quality and stability of cobia (Rachycentron canadum) fillets that were packaged in different ways and then stored in different conditions. On the one hand, the fillets were stored in open plastic bags, on the other hand in evacuated plastic bags. The fillets were then stored in a cold store for up to 5 months at -18 ° C and -25 ° C, respectively. Every month throughout the storage period, measurements were made of boiling efficiency, water content, nitrogen concentration in the total volatile nitrogenous base (TVB-N), phospholipids (PL), free fatty acid (FFA) formation and oxidation (PV and TBARS) to assess the effect of storage. on the quality of the cobia fillets.
The amount of phospholipids decreased significantly and the concentration of FFA increased during the storage period, which shows that enzyme activity was considerable in all experimental groups. There were significant changes in PV and TBARS values during storage. The choice of storage temperature and the length of storage had a significant effect on lipid degradation. The lipids were more stable at the lower storage temperature (-25 °). Furthermore, the results showed that the packing of cobia fillets in vacuum-packed packaging significantly reduced the oxidation or development of fillets compared to the air-packed fillets. Interestingly, cobia fillets in vacuum-packed containers stored at -18 ° C had a somewhat better quality compared to fillets in conventional packages stored at a lower temperature of -25 ° C.
Project for a master's degree in food science worked at Matís.
Supervisors: Sigurjón Arason (HÍ / Matís), María Guðjónsdóttir (HÍ), Magnea Karlsdóttir (Matís), Tumi Tómasson (UNU-FTP). Nha Trang University (NTU) in Vietnam.
Examiner: Kristín Anna Þórarinsdóttir (Marel).