期刊
LWT-FOOD SCIENCE AND TECHNOLOGY
卷 136, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.lwt.2020.110293
关键词
Microencapsulation; gamma-Aminobutyric acid; Dextran; Inulin; Lactobacillus plantarum
资金
- Indian Council of Agricultural Research (ICAR) New Delhi
- National Agricultural Science Fund (NASF) [NASF/AE6017/2016-17/49]
In this study, gamma-aminobutyric acid (GABA) and Lactobacillus plantarum (LP) were co-encapsulated using spray drying in a biocompatible matrix. The optimal shell composition obtained by mixture design maintained the stability of microcapsules. The research showed that the produced microcapsules had high thermal stability and good viability of bacteria and GABA retention.
In this study, a bioactive neurotransmitter commonly known as gamma-aminobutyric acid (GABA), and a probiotic Lactobacillus plantarum (LP) were co-encapsulated using spray drying in a biocompatible matrix composed of inulin, dextran, and maltodextrin. The effects of each wall material on the physicochemical characteristics of microcapsules such as moisture content, GABA content, flowability, bulk, and tapped density were evaluated. The optimum shell composition obtained by D-optimal mixture design was 0.4%, 4.6%, and 8.4% of inulin, dextran, and maltodextrin respectively. The optimum formulation exhibited maximum GABA and LP encapsulation efficiencies of 84.22% and 99.21% respectively, along with a desirability of 0.86. The microcapsules maintained a spherical morphology with particle size in the range of 10-35 mu m, as determined from SEM and optical microscopic images. The FTIR analysis confirmed that inulin, dextran, and maltodextrin retained their native chemical structure in the microcapsules even after spray drying. The TGA results revealed that the produced microcapsules were highly thermostable. Furthermore, no significant differences (p < 0.05) in the viability of bacteria and GABA retention was found after 120 days of storage at 4 degrees C. Thus, the microcapsules offer GABA, probiotics, and prebiotics in a single multifunctional platform for delivery through various food matrices.
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