Constructing simplified microbial consortia to improve the key flavor compounds during strong aroma-type Baijiu fermentation was written by Gao, Jiangjing;Qin, Jiejie;Ye, Fangping;Ding, Feng;Liu, Guoying;Li, Anjun;Ren, Cong;Xu, Yan. And the article was included in International Journal of Food Microbiology in 2022.Reference of 2198-61-0 The following contents are mentioned in the article:
The ester compounds play key roles in maintaining the sensory characteristics of alc. beverages. For strong aroma-type Baijiu fermentation, the volatile acids from pit mud microbes are key precursors for ester synthesis. However, the volatile acids can only be efficiently synthesized by the pit mud microbes in grains which attaches to pit mud. Elevating the ester contents in the upper layer’s fermented grains is vital to improve the quality of raw liquor. In this study, we applied top-down strategy and aim to simplify and obtain pit mud microbial consortia to efficiently produce caproate but not off-flavor compounds The simplified consortia with Caproiciproducens spp. as dominant species can use unsterilized fermentation water as sole substrate for caproate production, and stable caproate production was achieved by inoculating these simplified consortia in scaling-up fermentation The fermented broth was then applied to facilitate the fermentation of upper layer’s grains to prompt ester synthesis. Finally, the contents of variety esters such as Et caproate, Et pentanoate and Et octanoate were markedly increased. Together, this study demonstrates that constructing simplified microbial consortia containing key flavor-producing species is feasible to improve the flavor quality of spontaneously fermented foods. This study involved multiple reactions and reactants, such as Isopentyl hexanoate (cas: 2198-61-0Reference of 2198-61-0).
Isopentyl hexanoate (cas: 2198-61-0) belongs to esters. Volatile esters with characteristic odours are used in synthetic flavours, perfumes, and cosmetics. Certain volatile esters are used as solvents for lacquers, paints, and varnishes. Acyl chlorides and acid anhydrides alcoholysis is another way to produce esters. Acyl chlorides and acid anhydrides react with alcohols to produce esters. Anydrous conditions are recommended since both acyl chlorides and acid anhydrides react with water.Reference of 2198-61-0
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics