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Alginate-chitosan microcapsules containing probiotics (Yeast, Y235) were prepared by emulsification/external gelation and emulsification/internal gelation techniques respectively. The gel beads by external gelation showed asymmetrical structure, but those by internal gelation showed symmetrical structure in morphology. The cell viability was approximately 80% for these two techniques. However, during cell culture process, emulsification/internal gelation microcapsules showed higher cell growth and lower cell leakage. Moreover, the survival rate of entrapped low density cells with culture (ELDCwc) increased obviously than that directly entrapped high density cells (dEHDC) and free cells when keeping in simulated gastrointestinal conditions. It indicated the growth process of cells in microcapsule was important and beneficial to keep enough active probiotics under harmful environment stress. Therefore, the emulsification/internal gelation technique was the preferred method for application in food or biotechnological industries. Copyright © 2013 Elsevier Ltd. All rights reserved.


Huiyi Song, Weiting Yu, Meng Gao, Xiudong Liu, Xiaojun Ma. Microencapsulated probiotics using emulsification technique coupled with internal or external gelation process. Carbohydrate polymers. 2013 Jul 1;96(1):181-9

PMID: 23688468

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