Thermal aggregation of calcium-fortified skim milk enhances probiotic protection during convective droplet drying - Institut Agro Rennes-Angers Accéder directement au contenu
Article Dans Une Revue Journal of Agricultural and Food Chemistry Année : 2016

Thermal aggregation of calcium-fortified skim milk enhances probiotic protection during convective droplet drying

Résumé

Probiotic bacteria have been reported to confer benefits on hosts when delivered in an adequate dose. Spraydrying is expected to produce dried and microencapsulated probiotic products due to its low production cost and high energy efficiency. The bottleneck in probiotic application addresses the thermal and dehydration-related inactivation of bacteria during process. A protective drying matrix was designed by modifying skim milk with the principle of calcium-induced protein thermal aggregation. The well-defined single-droplet drying technique was used to monitor the droplet-particle conversion and the protective effect of this modified Ca-aggregated milk on Lactobacillus rhamnosus GG. The Ca-aggregated milk exhibited a higher drying efficiency and superior protection on L. rhamnosus GG during thermal convective drying. The mechanism was explained by the aggregation in milk, causing the lower binding of water in the serum phase and, conversely, local concentrated milk aggregates involved in bacteria entrapment in the course of drying. This work may open new avenues for the development of probiotic products with high bacterial viability and calcium enrichment.
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Dates et versions

hal-01454641 , version 1 (02-02-2017)

Identifiants

Citer

Juan Wang, Song Huang, Nan Fu, Romain Jeantet, Xiao Dong Chen. Thermal aggregation of calcium-fortified skim milk enhances probiotic protection during convective droplet drying. Journal of Agricultural and Food Chemistry, 2016, 64 (30), pp.6003-6010. ⟨10.1021/acs.jafc.6b02205⟩. ⟨hal-01454641⟩
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