Growth and survival of microencapsulated probiotics prepared by emulsion and internal gelation.

Efficient microencapsulation of probiotics by most existing methods is limited by low throughput. In this work, and were microencapsulated by a method based on emulsion and internal gelation. The growth and survival of microencapsulated microbes under different stressors were investigated using free non-encapsulated ones as a control. The results showed that the prepared micro-beads by emulsion and internal gelation exhibited a spherical and smooth shape, with sizes between 300 and 500 μm. Both and grew well and survived better when encapsulated in micro-beads. The survival rates were increased 25% and 40% for microencapsulated and respectively when compared with non-encapsulated controls under high temperature and high humidity. The increases of survival rates were 60% for microencapsulated and 25% for in simulated gastric juice. And the increases were 15% and 20% respectively when the survival rates of the microencapsulated and were determined in simulated intestinal juice. The microencapsulation by emulsion and internal gelation offers an effective way to protect microbes in adverse in vitro and in vivo conditions and is promising for the large-scale production of probiotics microencapsulation.