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Pu Liu,Zhengshan Chen,Ganlu Wang,Tie Mao,Chao Li,Yanan Zhou,Hong Xie,Tong Xiang 한국지질과학협의회 2024 Geosciences Journal Vol.28 No.1
The karst geothermal reservoir, Sinian Dengying Formation was investigated from the hydrogeochemical perspective. Integrated techniques including XRD + SEM, isotopes, saturation index and PHREEQC modeling were applied. With 37.3–72 ?, the targeted waters indicate low-mediate temperature geothermal reservoir. The CO2 concentration in the geothermal waters varies from 1.2 mg/L to 52.42 mg/L, and the log(PCO2) value ranges from −2.53 to −1.29, indicating an open carbonate system. A further D-18O stable isotope analysis addresses the geothermal waters are replenished by meteoric water from +815.52 m to +1427.78 m. Strong water-rock interactions are indicated by apparent 18O shift. The dominating hydrochemical type is SO4·HCO3-Ca·Mg with some Cl-Na. The CO2-TDS-SI-Carbonates comprehensive analysis illustrate the origin of Ca2+, Mg2+, and HCO3−, mainly from dolomite. The correlation of 18O-SO42-SI_Gypsum gives sound evidence for the processes of gypsum dissolution. Three inverse models were established and the results showed, that geothermal waters are controlled by two major factors: 1) the adjacent location to salt basin geological profiles with halite dissolution; and 2) the clay minerals such as Na-montmorillonite causing cation exchanges between Na+ and Ca2+ in the geothermal waters, resulting in excess of Na in relation to Cl concentrations.
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Yi-Bin Lan,Xiao-Feng Xiang,Wei-Xi Yang,Bao-Qing Zhu,Hong-Tie Pu,Chang-Qing Duan 한국식품과학회 2020 Food Science and Biotechnology Vol.29 No.12
Berries of six Vitis davidii Foex (spine grape)cultivars (‘Baiputao’, ‘Gaoshan 1’, ‘Gaoshan 2’, ‘Seputao’,‘Miputao’, and ‘Tianputao’) were harvested from a commercialvineyard in Hunan Province in China. Free andbound volatile compounds and fatty acids were analyzedby GC–MS, and amino acids were analyzed by HPLC. ‘Tianputao’ and ‘Miputao’ were characterized by relativelyhigher concentrations of aromatic amino acids and lowerconcentrations of branched-chain amino acids. The majorfree volatile compounds of spine grapes were hexanal, (E)-2-hexenal, 1-hexanol, (E)-2-hexenol, (E)-b-damascenone,and benzeneacetaldehyde. The major glycosidically boundvolatile compounds identified were 1-hexanol, menthol,nerol, 1-butanol, 3-methyl-3-butenol, benzenemethanol, bphenylethanol,eugenol, and guaiacol. (E)-b-damascenone,benzeneacetaldehyde, guaiacol, and eugenol had odoractivity values (OAVs)[1 in all cultivar grapes. Partialleast squares discriminant analysis (PLS-DA) revealed‘Tianputao’ to be distinct from the other cultivars due to itsrelatively higher concentrations of major terpenoids,norisoprenoids, higher alcohols, and aromatic amino acids.
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