Screening and characteristic aroma analysis of aroma-producing yeasts in high-temperature Daqu was written by Lu, Yan-xiang;Liang, Hui-zhen;Chen, Peng;Liu, Zheng;Zhong, Cheng. And the article was included in Shipin Yanjiu Yu Kaifa in 2021.Computed Properties of C10H18O2 This article mentions the following:
Two yeast strains characterized by high aroma production, namely Y3 and Y5, were obtained from the high-temperature Daqu. After separation and purification, primary screening for aroma production using liquid fermentation, and secondary screening using solid fermentation were performed. Headspace solid-phase microextraction-gas chromatog.-mass spectrometry (HS-SPME-GC-MS) was employed to detect and analyze the products obtained after solid-state fermentation of Y3 and Y5. As a result, 43 and 37 volatile aroma compounds were recovered from Y3 and Y5, resp. The main aroma producing compounds among the products obtained after Y3 solid-state fermentation were 灏?phenethyl alc., isoamyl alc., isovaleric acid, and Et butyrate, and those obtained after Y5 solid-state fermentation were 灏?phenylethanol, 4-vinylguaiacol, and isoamyl alc. acid. Based on the morphol., physiol., and biochem. examinations, and mol. identification, Y3 was identified as Saccharomycopsis fibuligera, and Y5 was identified as Wickerhamomyces anomalus. Thereafter, Y3 and Y5 were mixed in equal proportions, and added to the Maotai-flavored liquor fermented grains to simulate the production and fermentation, and then the distilled liquor samples were examined using gas chromatog. (GC) for skeleton composition The results revealed that both Y3 and Y5 significantly increased the levels of Et acetate, Et lactate, and 灏?phenylethanol in liquor. In the experiment, the researchers used many compounds, for example, 5-Hexyldihydrofuran-2(3H)-one (cas: 706-14-9Computed Properties of C10H18O2).
5-Hexyldihydrofuran-2(3H)-one (cas: 706-14-9) 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. Esters contain a carbonyl center, which gives rise to 120鎺?C閳ユ弲閳ユ彊 and O閳ユ弲閳ユ彊 angles. Unlike amides, esters are structurally flexible functional groups because rotation about the C閳ユ彊閳ユ弲 bonds has a low barrier. Their flexibility and low polarity is manifested in their physical properties; they tend to be less rigid (lower melting point) and more volatile (lower boiling point) than the corresponding amides. Computed Properties of C10H18O2
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics