title: NMR-based metabolic profiling of rice wines by F(2)-selective total correlation spectra.
abstract: In this study, we performed NMR-based metabolic profiling of major rice wines (Japanese sake, Chinese Shaoxing wine, and Korean makgeolli). In the (1)H NMR spectra, the rice wines showed broad resonances in the region of about 7.9-9.0 ppm. These resonances showed many and complex correlations with approximately 0.5-4.5 ppm in the F(2)-selective TOCSY (total correlation spectroscopy) spectra, and these correlations were attributed mainly to peptides. These spectral patterns were characteristic of individual rice wines, and the combination of F(2)-selective TOCSY spectra and principal component analysis enabled us to classify the rice wine species. Furthermore, it also provided information about raw materials, namely, what type of koji (rice koji or wheat koji) was used. These spectra may be useful as a new "fingerprint" for quality control or food authentication.
authors.affiliation: Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo 113-8657, Japan.
authors.forename: Masanori
authors.initials: M
authors.lastname: Koda
authors.forename: Kazuo
authors.initials: K
authors.lastname: Furihata
authors.forename: Feifei
authors.initials: F
authors.lastname: Wei
authors.forename: Takuya
authors.initials: T
authors.lastname: Miyakawa
authors.forename: Masaru
authors.initials: M
authors.lastname: Tanokura
mesh_terms: D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D055442:Metabolome; D012275:Oryza / Q000737:chemistry* / Q000378:metabolism; D011786:Quality Control; D014920:Wine / Q000032:analysis*