Myrosinase-positive bacteria from local fermented foods and beverages in Thailand with the capacity to metabolize glucosinolate and produce isothiocyanates (ITCs) were isolated and used as selected strains for Thai cabbage fermentation. Enterobacter xiangfangensis 4A-2A3.1 (EX) from fermented fish and Enterococcus casseliflavus SB2X2 (EC) from fermented cabbage were the two highest ITC producers among seventeen strains identified by 16S rRNA technique. EC and EX were used to ferment Thai cabbage (Brassica oleracea L. var. capitata) containing glucoiberin, glucoraphanin and 4-hydroxyglucobrassicin at 430.5, 615.1 and 108.5 µmol/100 g DW, respectively for 3 days at 25 °C. Different amounts of iberin nitrile, iberin, sulforaphane and indole 3-acetonitrile were produced by spontaneous, EX- and EC-induced cabbage fermentations, and significantly higher ITCs were detected (p < 0.01) with increased antioxidant activities. Iberin and sulforaphane production in EX-induced treatment peaked on day 2 at 117.4 and 294.1 µmol/100 g DW, respectively, significantly higher than iberin at 51.7 µmol/100 g DW but not significantly higher than sulforaphane at 242.6 µmol/100 g DW in EC-induced treatment at day 2. Maximum health-promoting benefits from this functional food can be obtained from consumption of a liquid portion of the fermented cabbage with higher ITC level along with a solid portion.

Overuse of antibiotics in aquaculture has generated bacterial resistance and altered the ecology. Aquacultural disease control requires an environmentally sustainable approach. Bacterial exopolysaccharides (EPSs) as bioimmunostimulants have not been extensively explored in aquaculture. This study investigated EPS produced from 5% w/v riceberry broken rice as a carbon source and 1% w/v soybean meal as a nitrogen source by Bacillus tequilensis PS21 from milk kefir grain for its immunomodulatory, antioxidant activities and resistance to pathogenic Streptococcus agalactiae in Nile tilapia (Oreochromis niloticus). The FTIR spectrum of EPS confirmed the characteristic bonds of polysaccharides, while the HPLC chromatogram of EPS displayed only the glucose monomer subunit, indicating its homopolysaccharide feature. This EPS (20 mg/mL) exhibited DPPH scavenging activity of 65.50 ± 0.31%, an FRAP value of 2.07 ± 0.04 mg FeSO₄/g DW, and antimicrobial activity (14.17 ± 0.76 mm inhibition zone diameter) against S. agalactiae EW1 using the agar disc diffusion method. Five groups of Nile tilapia were fed diets (T1 (Control) = 0.0, T2 = 0.1, T3 = 0.2, T4 = 1.0, and T5 = 2.0 g EPS/kg diet) for 90 days. Results showed that EPS did not affect growth performances or body composition, but EPS (T4 + T5) significantly stimulated neutrophil levels and serum lysozyme activity. EPS (T5) significantly induced myeloperoxidase activity, catalase activity, and liver superoxide dismutase activity. EPS (T5) also significantly increased the survival of fish at 80.00 ± 5.77% at 14 days post-challenge with S. agalactiae EW1 compared to the control (T1) at 53.33 ± 10.00%. This study presents an efficient method for utilizing agro-industrial biowaste as a prospective source of value-added EPS via a microbial factory to produce a bio-circular green economy model that preserves a healthy environment while also promoting sustainable aquaculture.

This data evaluated the capacity of Bacillus spp. isolated from Thai milk kefir to produce exopolysaccharide (EPS) on cassava pulp and tested its antioxidant and antibacterial properties. Thailand's starch industry generates million tons of cassava pulp, which is underutilized or bio-transformed into higher-value bioproducts. Antioxidant and antibacterial bacterial exopolysaccharides are beneficial in the food, feed, pharmaceutical, and cosmetic industries. Moisture, ash, fat, protein, fiber, starch, sugar, neutral detergent fiber (NDF), acid detergent fiber (ADF), and acid detergent lignin (ADL) were analyzed from cassava pulp as an EPS substrate. After 3 days of bacterial fermentation, EPS generation, culture pH, reducing sugar amount, and bacterial count were recorded. Antioxidant activities and bioactive content including hydroxyl radical scavenging activity, 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity, ferric reducing antioxidant power (FRAP), total phenolic and flavonoid content (TPC and TFC), and antimicrobial activity against two Nile tilapia pathogens (Streptococcus agalactiae and Staphylococcus aureus) from different Bacillus species were evaluated. Proximate analysis, dinitrosalicylic acid assay, pH value record, bacterial count using spread plate method, antioxidant activity and bioactive content assays via spectrophotometry, and agar disk diffusion were the main approaches. This study used microbial cell factories to convert agro-biowaste, such as cassava pulp, into EPS bioproducts which accords with a bio-circular green economy model.

Aims: The characteristics, antioxidant property of Hawm Nil rice (Purple rice), Red Hawm rice (Red rice), Khao Dawk Mali 105 rice (White rice) milk kefirs and mixing of three color rice milk kefir in different ratios were investigated. Then, anti-inflammatory activity of Hawm Nil rice kefir was studied. Methodology: The physiochemical properties, total phenolic compounds and antioxidant activities of these rice milk kefirs were investigated. Anti-inflammatory measurements were performed to study blood chemistry, hematological values and tumor necrosis factor-a (TNF-a) level in colitis rats compared with rats treated with prednisolone (positive control) and cow's milk kefir. Results: All the rice kefir formulas had lower pH values than the cow's milk kefir. Moreover, they all exhibited no changing viscosity. Lactic acid concentrations increased in cow's milk kefir during 24-48 h. Alcohol concentrations in all the rice formulas increased within 24-48 h, while cow's milk only increased at 72 h. Antioxidant activity, most of the rice milk kefirs had antioxidant activity higher than cow's milk by DPPH assay. In addition, the Hawm Nil rice milk kefir had high antioxidant activity by DPPH assay and FRAP assay. Blood chemistry, hematological values and tumor necrosis factor-α (TNF-α) levels in colitis rats treated with Hawm Nil rice milk kefir did not differ from those treated with prednisolone and cow's milk kefir. TNF-α in the serum of colitis rats treated with Hawm Nil rice milk kefir was significantly reduced when compared to the PBS buffer. Conclusion: The findings indicated that color rice kefirs may offer protection against chemically induced tissue injury. Hawm Nil rice milk kefir exerted potential antioxidant and anti-inflammatory activities and was safe for human consumption. Other Thai colored rice will be used to develop Thai rice milk kefir products as new and antioxidant-rich beverages and functional foods for human health benefits in the future.

Humans are increasingly consuming insects as an alternative source of protein, with various products being developed to improve their acceptability. Insect protein extracts are becoming notable food ingredients, with a few studies investigating the functional and biological properties of proteins from different insects. This study determined the effect of hydrolysis time on the functional, chemical, and biological activities of cricket protein hydrolysate (CPH) extracted from Gryllus bimaculatus. The cricket powder was hydrolyzed using the enzyme alcalase at 4% w/w. The hydrolysate samples were collected at 20, 40, 60, 120, and 180 min and analyzed for many properties. The CPH obtained at 120 and 180 min had the highest degree of hydrolysis (DH) (84.42-84.78%), while the CPH obtained from 60-180 min hydrolysis had the highest yield (34.92-36.99%). Free amino acids increased over time. The CPH powder was highly soluble at pH 7 and had higher foaming ability and stability than the control, while the emulsion abilities of the CPH and the control were similar. The CPH obtained after 120 to 180 min of hydrolysis showed the strongest antioxidant activity analyzed using the DPPH, FRAP, and ABTS assays. CPH after 120 minutes of hydrolysis showed the highest ACE inhibition ability of 67.59%. The results suggested that CPH prepared by hydrolyzing cricket powder with alcalase for 60 and 120 minutes was suitable and showed potential as a protein source with high water solubility and good foaming ability for further non-food applications.