title: (17)O NMR and Raman Spectroscopies of Green Tea Infusion with Nanomaterial to Investigate Their Properties.
abstract: (17)O NMR and Raman spectrograms of green tea infusions with nanomaterial were investigated. Different green tea infusions were prepared by steeping tea powder with different concentrations of nanomaterial aqueous solution. The tea infusions were tested with (17)O NMR and Raman spectroscopies. The (17)O NMR results showed that line width increased to 90 in the tea infusions after nanomaterial was added as a result of the effects of the self-association of Ca(2+) and tea polyphenol. The results of Raman spectroscopy showed that, in tea infusions, the enhancement of C─C and C─O stretching vibrations suggest an increase in the number of effective components in water.
authors.affiliation: South China University of Technology, School of Chemistry and Chemical Engineering, Guangzhou 510640, Guangdong, China.
authors.forename: Changyan
authors.initials: C
authors.lastname: Zhou
authors.affiliation: South China University of Technology, School of Chemistry and Chemical Engineering, Guangzhou 510640, Guangdong, China.
authors.forename: Huiping
authors.initials: H
authors.lastname: Zhang
authors.affiliation: South China University of Technology, School of Chemistry and Chemical Engineering, Guangzhou 510640, Guangdong, China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Yan
authors.affiliation: South China University of Technology, School of Chemistry and Chemical Engineering, Guangzhou 510640, Guangdong, China.
authors.forename: Xinya
authors.initials: X
authors.lastname: Zhang
mesh_terms: D002118:Calcium / Q000032:analysis*; D006863:Hydrogen-Ion Concentration; D009682:Magnetic Resonance Spectroscopy; D049329:Nanostructures / Q000032:analysis* / Q000737:chemistry; D010103:Oxygen Isotopes; D013059:Spectrum Analysis, Raman; D013662:Tea / Q000737:chemistry*
chemical_list: D010103:Oxygen Isotopes; D013662:Tea; D002118:Calcium