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Rice bran as an encapsulating material to produce a healthy synbiotic product with improved gastrointestinal tolerance

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Abstract

To date, the coffee industry has the second highest market value in the world and consumer behavior has transitioned from drinking coffee just for its caffeine content to reduce sleepiness into an overall experience. Instant cold brew coffee in powder form can preserve the taste of coffee well; moreover, it is easy to transport. Several consumers have increasing interests in implementing lactic acid bacteria in healthy food due to their growing awareness of the probiotic’s role. Several scholars have presented stress adaptation characteristics of single probiotic strains; however, comparisons of the stress-tolerant capacities of different probiotic strains are incomplete. Five lactic acid strains are tested for adaptation under four sublethal conditions. Lactobacillus casei is the most resilient probiotic in terms of heat and cold adaptation, while Lactobacillus acidophilus is more tolerant to low acid and bile salt; Then, these probiotics are subjected to a stress challenge that stimulates drying temperature, including a heat and cold stress challenge. The results show that acid adaptation can improve Lactobacillus acidophilus TISTR 1338 tolerance to harsh drying temperatures. In addition, encapsulation using prebiotic extracts from rice bran, with pectin and resistant starch combined through crosslinking and treated by freeze-drying, provides the highest encapsulation efficiency. In summary, acid-adapted L. acidophilus TISTR 1388 at the sublethal level can be applied to high and low temperature processing techniques. Additionally, the amount of viable probiotic after in vitro digestion remains at 5 log CFU/g, which is suitable for application in the production of synbiotic cold brew coffee.

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The data that support the findings of this study are openly available in Springer Nature at http://doi.org/[doi], reference number [reference number].

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Funding

This research is a part of the process development of functional symbiotic products from defatted organic rice bran for promoting the digestive system, and it is a continuous project of the effects of prebiotics from rice bran extract on the growth of heat-resistant probiotic bacteria and their applicability. The authors have disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: Thailand Science Research and Innovation (TSRI) organization, Thailand [grant number CPR6405031700].

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All authors contributed equally to this work.

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Correspondence to Patimakorn Klaiprasitti.

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All authors declare that they have no conflicts of interest. Furthermore, this research is not applicable for ethical approval, and there are no competing interests.

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Communicated by Yusuf Akhter.

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Tianwitawat, C., Klaiprasitti, P. Rice bran as an encapsulating material to produce a healthy synbiotic product with improved gastrointestinal tolerance. Arch Microbiol 205, 265 (2023). https://doi.org/10.1007/s00203-023-03586-w

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  • DOI: https://doi.org/10.1007/s00203-023-03586-w

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