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This study was conducted to characterize the volatile components of Korean fermented tea and blended tea with Korean fermented tea and several herbs. A total of 161 volatile components in 4 samples of FT (fermented tea), BT (blended tea) 1, BT2, and BT3 were analyzed in this study. A total of 61 volatile compounds were identified in the FT sample, which contained the most abundant hydrocarbons. The major compounds were 3-methyldecane (10.48%), 2,2,4, 6,6-pentamethylheptane (10.00%), and 2,3,6-trimethyloctane (7.90%). A total of 75 volatile compounds were identified in the BT1 sample, which consisted of fermented tea, orange cosmos, lemon grass, chamomile, and peppermint. L-(-)-menthol (36.79%), menthone (24.92%), and isomenthone (8.70%) were the highest compounds. A total of 76 volatile compounds were identified in the BT2 sample, which was composed of fermented tea, rose hip, lemongrass, lavender, and peppermint. Alcohols were identified as the most abundant, and linalool (26.32%), linalyl acetate (18.45%), and L-(-)-menthol (11.99%) were the major components. A total of 85 volatile compounds were identified in the BT3 sample composed of fermented tea, citrus peel, chamomile, hibiscus, and beet. Sesquiterpenes were identified as the most abundant including L-limonene (74.45%), β-myrcene (3.06%), and γ-terpinene (7.47%).
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http://dx.doi.org/10.3746/pnf.2018.23.3.245 | DOI Listing |
Microbiologyopen
October 2025
Department of Biochemistry, Faculty of Science and Technology, Chiromo Campus, Off Riverside Drive, University of Nairobi, Nairobi, Kenya.
Alkaline pectinases are in demand in industrial processes that require the degradation of plant pectins at high pH, for example, removal of pectin stains from fabrics, cutlery, and porcelain; treatment of pectic wastewater; fermentation of coffee, tea, and cocoa; manufacture of poultry and animal feeds, and processing of textiles, and so forth. The present study aimed to (a) screen four alkaliphilic microbial isolates, previously obtained from samples collected around Lake Bogoria (soda lake), Baringo County, Kenya, for alkaline pectinases, and (b) characterize the pectinase-producers. The screening data revealed that all the isolates were pectinase producers, exhibiting catalytic activities that ranged from 1.
View Article and Find Full Text PDFFood Res Int
November 2025
College of Food Science and Engineering, Gansu Agricultural University, Lanzhou, China. Electronic address:
In this study, yak bone collagen peptide-tea polyphenol binding peptides (YCP/TP) were successfully prepared and investigated for their positive effects in replacing nitrite to improve the color, texture, flavor and bacterial community structure of fermented sausages. Results showed that YCP/TP primarily binds through hydrogen bond interactions, enhancing its stability and functional properties. The YCP/TP can effectively inhibit the increase in pH, protein carbonyls and TBARS (p < 0.
View Article and Find Full Text PDFFood Res Int
November 2025
Shaanxi Engineering Laboratory for Food Green Processing and Safety Control, and Shaanxi Key Laboratory for Hazard Factors Assessment in Processing and Storage of Agricultural Products, College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an 710119, China. Electronic ad
In this study, we produced instant dark tea (IDT) by liquid-state fermentation of Ziyang selenium-enriched summer-autumn tea leaves utilizing Eurotium cristatum. Then, the novel mechanism of IDT against obesity was investigated. Our results for the first time revealed that IDT could alleviate obesity by regulating the gut microbiota and promoting adipose thermogenesis.
View Article and Find Full Text PDFFood Res Int
November 2025
Tea Research Institution, Yunnan Academy of Agricultural Sciences, Kunming 650200, China; Yunnan Key Laboratory of Tea Science, Tea Research Institution, Yunnan Academy of Agricultural Sciences, Kunming 650200, China. Electronic address:
Pu-erh raw tea (PRT), a post-fermented tea, is prized for its complex flavor profile and health-promoting properties. While extended storage enhances its sensory attributes, the decade-scale metabolic dynamics underpinning flavor evolution remain unexplored. This study comprehensively characterized non-volatile metabolomic profiles and flavor changes in PRT across a 10-year storage period (2012-2023).
View Article and Find Full Text PDFJ Food Sci Technol
October 2025
Department of Liquor Brewing, Moutai Institute, Renhuai, 564507 China.
Unlabelled: This study explored the impact of green tea addition on bacterial communities in Moutai-flavored fermentation using high-throughput sequencing, alongside physicochemical and flavor analysis. Significant differences in microbial succession were observed over the 40-day fermentation period among types with varying tea proportions, resulting in distinct bacterial communities. Sixteen dominant genera, including , , and , were identified, with their relative abundances and succession patterns varying by type.
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