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The Effect of Encapsulation on The Stability of Probiotic Bacteria in Ice Cream and Simulated Gastrointestinal Conditions

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Abstract

The objective of this work was to explore the effect of two encapsulating polysaccharides (sodium alginate and carrageenan) on the viability of probiotic bacteria (L. acidophilus) in ice cream and under simulated gastrointestinal (GIT) conditions. For the purpose, probiotic cells were encapsulated in sodium alginate and carrageenan by an encapsulator using standard operating conditions. Ice cream was manufactured by adding free and microencapsulated probiotics. The survival of free and encapsulated probiotics was monitored over a period of 120 days at − 20 °C. Furthermore, the survival of free and encapsulated probiotic bacteria under the simulated GIT conditions was investigated. The results of the study showed that encapsulation significantly (p < 0.05) improved the cell survival of probiotics in ice cream compared to free cells (non-encapsulated). The viable cell count of probiotic bacteria in the free-state in ice cream was 9.97 log cfu/ml at 0 day that decreased to 6.12 log cfu/ml after 120 days. However, encapsulation improved the viability of the probiotics in the prepared ice cream and GIT. The cell count of probiotics encapsulated with sodium alginate and carrageenan was 9.91 log cfu/ml and 9.89 log cfu/ml respectively at 0 day that decreased to 8.74 log cfu/ml and 8.39 log cfu/ml respectively after 120 days. Similarly, during simulated gastrointestinal assay, the survival rate of encapsulated probiotic bacteria in simulated gastric solution and intestinal solutions was higher than that of free cells. In the case of encapsulated bacteria, only three log while for free cells seven log reduction was recorded. Sodium alginate microcapsules exhibited better release profile than carrageenan. Conclusively, the incorporation of encapsulated probiotics had a significant effect on quality parameters and sensorial characteristics of ice cream.

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Acknowledgments

The authors are thankful to the Government College University Faisalabad and National Institute of Food Science and Technology, University of Agriculture, Faisalabad for providing technical support and laboratory facilities during research work.

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Authors and Affiliations

  1. Institute of Home & Food Sciences, Government College University, Faisalabad, Pakistan

    Muhammad Afzaal, Farhan Saeed, Muhammad Umair Arshad, Muhammad Tahir Nadeem & Tabussam Tufail

  2. National Institute Food Science & Technology, University of Agriculture University, Faisalabad, Pakistan

    Muhammad Saeed

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  1. Muhammad Afzaal
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  2. Farhan Saeed
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  3. Muhammad Umair Arshad
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  4. Muhammad Tahir Nadeem
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Correspondence to Muhammad Afzaal.

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Afzaal, M., Saeed, F., Arshad, M.U. et al. The Effect of Encapsulation on The Stability of Probiotic Bacteria in Ice Cream and Simulated Gastrointestinal Conditions. Probiotics & Antimicro. Prot. 11, 1348–1354 (2019). https://doi.org/10.1007/s12602-018-9485-9

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