Microencapsulation of Lactobacillus plantarum (mtcc 5422) by spray-freeze-drying method and evaluation of survival in simulated gastrointestinal conditions

Priyanka, Dolly and Anishaparvin, A. and Joseph, G. S. and Anandharamakrishnan, C. (2011) Microencapsulation of Lactobacillus plantarum (mtcc 5422) by spray-freeze-drying method and evaluation of survival in simulated gastrointestinal conditions. Journal of Microencapsulation, 28 (6). pp. 568-574.

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Abstract

Spray-drying (SD) and freeze-drying (FD) are widely used methods for microencapsulation of heat-sensitive materials like probiotics for long-term preservation and transport. Spray-freeze-drying (SFD) is relatively a new technique that involves spraying a solution into a cold medium and removal of solvent (water) by conventional vacuum FD method. In this study, the SFD microencapsulated Lactobacillus plantarum powder (1:1 and 1:1.5 core-to-wall ratios of whey protein) is compared with the microencapsulated powders produced by FD and SD methods. The SFD and FD processed microencapsulated powder show 20% higher cell viability than the SD samples. In simulated gastrointestinal conditions, the SFD and FD cells show up to 4 h better tolerance than SD samples and unencapsulated cells in acidic and pepsin condition. The morphology of SFD samples shows particles almost in spherical shape with numerous fine pores, which in turn results in good rehydration behaviour of the powdered product.

Item Type:	Article
Uncontrolled Keywords:	microencapsulation, spray-drying, freeze-drying, spray-freeze-drying, core-to-wall ratio
Subjects:	600 Technology > 08 Food technology > 06 Preservation and Storage > 03 Freeze drying 600 Technology > 08 Food technology > 09 Food Microbiology
Divisions:	Human Resource Development
Depositing User:	Food Sci. & Technol. Information Services
Date Deposited:	22 May 2012 06:04
Last Modified:	05 Dec 2016 12:22
URI:	http://ir.cftri.res.in/id/eprint/4851

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