Fan, Guangsen published the artcileRoles of aging in the production of light-flavored Daqu, COA of Formula: C10H20O2, the main research area is Daqu aging physicochem property flavor microbiota; Aging process; Daqu; Microbial communities; Physicochemical parameters; Volatile compounds.
Daqu, a complex starting material used for Baijiu production, contains microorganisms, enzymes, and volatile compounds An important part of Daqu production is aging, but the physicochem. and microbial changes during aging remain largely unknown. This study characterized “”aging”” according to physicochem. parameters, volatile compounds, and microbial communities. Aging was found to aid in the stabilization of the physicochem. parameters. Solid-phase microextraction-gas chromatog.-mass spectrometry was used to detect 72 types of volatile compounds, which were predominantly alcs., esters, aldehydes, alkenes, and alkanes. During aging, these compounds changed considerably, but their structures eventually stabilized. A high-throughput sequencing approach was used to analyze the changing composition of the microbial communities. In general, aging helped to enrich and stabilize the microbial population for making Baijiu. A total of 35 bacteria were detected as prokaryotic; among these, 15 had a diversity abundance ratio of more than 1%. The dominant bacteria were from the genus Pantoea, but these decreased with aging, while bacteria from Lactobacillus and Weissella increased. After aging for 2 mo, Pantoea, Lactobacillus and Weissella accounted for 0.4%, 54.0%, and 18.9%, resp. A total of 12 eukaryotic yeast and fungi were detected, the most abundant of which were Incertae_Sedis_incertae_sedis, Saccharomycopsis, Trichocomaceae_unclassified, Pichia, Tremellales_unclassified, and Galactomyces. During aging, the levels of Trichocomaceae_unclassified, Saccharomycopsis, and Galactomyces initially decreased but then increased. Pichia stayed unchanged as aging progressed. In conclusion, aging led to rebalanced interactions among Daqu microbes and was important in improving Daqu quality and ensuring its stability.
Journal of Bioscience and Bioengineering published new progress about 16S rRNA Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 106-32-1 belongs to class esters-buliding-blocks, name is Ethyl octanoate, and the molecular formula is C10H20O2, COA of Formula: C10H20O2.
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics