Effect of some natural coating of table egg on shelf life during refrigerator storage
Keywords:
Table egg,, Natural coating,, Refrigerator storage,, Shelf life.Abstract
Two experiments were carried out at the College of Veterinary Medicine, University of Baghdad during the period from 02 / 11 / 2022 to 05 / 02 / 2023, aimed to compare between three coating table egg which were Starch, Carboxy Methyle Cellulose (CMC) and Agar on its quality characteristics, egg components percentage and microbial counts during Zero, 1, 2, 4 weeks of refrigerator storage. A total of 160 fresh table eggs (Brown shell eggs) were collected from a retail stores in Fallujah city. These eggs were separated in half for two experiments (80 egg per experiment). After egg collection 80 eggs of each experiment were immediately distributed into four groups of treatments: T1: 20 eggs were uncoated egg as control group. T2: 20 eggs were Starch coated egg. T3: 20 eggs were Carboxy methyl cellulose coated egg. T4: 20 eggs were Agar coated egg. All eggs were dried and refrigerator storage immediately after treatment. Results revealed that the processes of coating table eggs at the beginning of the experiment contributed to a significant increase in egg weight compared to control treatment eggs, and the highest weights were especially in eggs coated with CMC and Agar treatments, and this is due to the formation of a relatively thick layer of covers around the egg shell. When the storage age advanced to 1, 2, 4 weeks, there were a decrease in the weights of eggs and all interior quality for all treatments, but the percentage of decrease was significantly in the eggs of the control treatment, Then comes the coated treatment with starch, while the decrease were not significant for the two coated treatments using CMC and Agar. Also, coating processes with starch, CMC and Agar did not allow to increase total bacterial count and coliform bacterial count significant on egg shell compared with control treatment. In conclusion, coating table egg is very imported to extending shelf life of table eggs during storage and we recommended CMC and Agar as coating materials.
