Optimization of gelatin and gum arabic capsule infused with pandan flavor for multi-core flavor powder encapsulation.

This study aims to create multi-core encapsulated flavor powder (MEFP) using gelatin, gum arabic infused with pandan flavor to capture Michelia Alba D.C. flavor powder (MADFP). The optimized formulae of the flavor-infused shell using gelatin-gum arabic (GGA) system consisted of gelatin (3.00% w/v), gum arabic (3.73% w/v), and pandan flavor (5.26% w/v) and provided high yield recovery with low moisture content and low water activity. The optimized MEFP also retain the pandan flavor within the wall material with high encapsulation efficiency. The release of the pandan flavor content from the shell of MEFP within 15 min was 394.92 ±â€¯2.02 µg/mL with the slowest release rate constant. The MEFP exhibited the excellent efficiency encapsulation of the MADFP which suggested that MEFP can mutually retain the flavor within the wall material and entrap the flavor powder to protect active material against the heated steam system.

Microencapsulation of white champaca (Michelia alba D.C.) extract using octenyl succinic anhydride (OSA) starch for controlled release aroma.

The objective of the study was to optimise the encapsulation of Michelia alba D.C. (MAD) extract using octenyl succinic anhydride (OSA) starch. The MAD extract (5-10 g/100 g of dry starch) and the OSA starch (25-100 g/100 ml of water) was used in microcapsule preparation and analysed for the physicochemical and encapsulation properties. The optimised formula using the MAD extract and the OSA starch were 15.00 g/100 g of dry starch and 96.32 g/100 g water, which provided the highest in yield recovery (40.65% ± 0.99) and encapsulation efficiency (68.91% ± 1.50), with the lowest moisture content (3.19% ± 0.06) and water activity (0.236 ± 0.004). The aroma release from the optimum encapsulated powder in simulated artificial saliva fluid (SSF) suggested that linalool retention in microcapsules was higher than verbenone and 2-methyl butanoic acid. This study shows that the optimised formulation of MAD encapsulated flavour powder was found to be effective for controlling the aroma release.

Optimisation of microencapsulation of turmeric extract for masking flavour.

The aim of this study was to evaluate the odour masking property, encapsulation efficiency and physicochemical properties of turmeric extract prepared by a binary blend of wall materials, i.e. brown rice flour (BRF) and beta-cyclodextrin (ß-CD). Response surface methodology was applied to investigate the effect of encapsulation processing variables, including core loading mass (5-25%) and ß-CD (5-20%) concentration on product recovery, moisture content, hygroscopicity, curcuminoids encapsulation and volatile release. To investigate odour masking properties of a wall material combination, volatiles in headspace were monitored by GC-MS using ar-turmerone and 2-methyl-4-vinylguaiacol as marker compounds to represent turmeric extract. The obtained results revealed an optimal encapsulation process was 5% of core loading mass with addition 20g/L of ß-CD, since it enabled high curcuminoids encapsulation with low volatile release, moisture content and hygroscopicity. Turmeric powder with reduced odour can be used as a nutrient supplement or natural colorant for food products.

Identification of lactic acid bacteria associated with the production of plaa-som, a traditional fermented fish product of Thailand.

Plaa-som is a Thai fermented fish product for which whole fish or fish fillets are fermented with either cooked rice or steamed sticky rice, salt, and garlic. A total of 762 lactic acid bacteria (LAB) were isolated during plaa-som fermentation by culture on CaCO(3)-MRS agar plates. They were screened and grouped by amplified ribosomal DNA restriction analysis (ARDRA), giving six groups that were identified by ribosomal DNA sequencing as Lactococcus garvieae, Streptococcus bovis, Weissella cibaria, Pediococcus pentosaceus, Lactobacillus plantarum, and Lactobacillus fermentum. Freshly mixed ingredients contained low populations of LAB (less than 10 CFU/g) that subsequently grew during fermentation to final populations of approximately 10(7)CFU/g. Early stages of the process were dominated by the presence of Lc. garvieae, S. bovis, and W. cibaria. At 48 h into fermentation, W. cibaria, P. pentosaceus, and Lb. plantarum were prevalent, and gave way to a dominance of Lb. plantarum that completed the fermentation. A mixture of these LAB species could be considered as species for development of a starter culture for plaa-som fermentation.