Effect of Milk Quality and Stabilizers on Some Physicochemical Properties of UHT-Milk
I., E., Ibrahim, A., S., A. (2018). Effect of Milk Quality and Stabilizers on Some Physicochemical Properties of UHT-Milk. EKB Journal Management System, 15(1), 49-64. doi: 10.21608/ajfs.2018.16348
El-Sayed I.; Amel Ibrahim; Awad S.. "Effect of Milk Quality and Stabilizers on Some Physicochemical Properties of UHT-Milk". EKB Journal Management System, 15, 1, 2018, 49-64. doi: 10.21608/ajfs.2018.16348
I., E., Ibrahim, A., S., A. (2018). 'Effect of Milk Quality and Stabilizers on Some Physicochemical Properties of UHT-Milk', EKB Journal Management System, 15(1), pp. 49-64. doi: 10.21608/ajfs.2018.16348
I., E., Ibrahim, A., S., A. Effect of Milk Quality and Stabilizers on Some Physicochemical Properties of UHT-Milk. EKB Journal Management System, 2018; 15(1): 49-64. doi: 10.21608/ajfs.2018.16348

Effect of Milk Quality and Stabilizers on Some Physicochemical Properties of UHT-Milk

Alexandria Journal of Food Science and Technology
Article 5, Volume 15, Issue 1, June 2018, Page 49-64  XML PDF (3.32 MB)
Document Type: Original Article
DOI: 10.21608/ajfs.2018.16348
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Authors
El-Sayed I.1; Amel Ibrahim2; Awad S.* 2
1Department of Dairy Technology Research, Food Technology Research Institute, ARC, Egypt.
2Department of Dairy Science and Technology, Faculty of Agriculture, Alexandria University, Egypt.
Abstract
Milk quality and stabilizers were investigated to revere their effects on undesirable changes in sensory of UHT milk as influenced by storage at 25°C or 37°C. The obtained results showed that the total microbial count, psychrophilic
bacteria, mesophilic & thermophilic spore forming bacteria were higher in grade B (GB) milk than in grade A (GA) milk. Seven treatments were carried out with GA, GB, reconstituted full cream milk powder (FCMP), FCMP mix with GA and GB milk, meanwhile, two commercial stabilizers were separately evaluated. Mesophilic and thermophilic
spore forming bacteria exhibited high scores and were found in standardized pasteurized GB milk comparing with GA milk. The type of stabilizer has no any effect on the UHT milk quality. The treatments of UHT milk made using GB milk received low levels of sensory properties (color & flavor), as well as, fat separation and sedimentation could be noted during storage when compared to that made from GA milk or FCMP. The fat separation and sedimentation
were more pronounced in treatments stored at 37 °C when compared to that stored at 25°C. Results of SDS-PAGE and RP-HPLC did not show any significant differences among all treatments in proteolysis during storage period. Accordingly’ the fat separation and sedimentation were not related only to proteolysis but were related to quality of milk used in processing.
Keywords
UHT milk; Sedimentation; fat separation; milk stabilizers
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