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Investigation of Germicide and Growth Enhancer Effects on Bean Sprout using NMR-based Metabolomics
윤다혜,마서희,최현수,노현경,옥영준,김석만 한국자기공명학회 2016 Journal of the Korean Magnetic Resonance Society Vol.20 No.4
Bean sprouts are often cultivated in the circumstances prevailing in the improper using of germicide and growth enhancer. The influence of ingestion those bean sprouts are unknown. The components of the bean sprouts are needed to evaluate for food safety. The extracts of the control, 0.5 g/L germicide, 1 g/L germicide, 12.5 mL/L growth enhancer and 25 mL/L growth enhancer were used to compare the components in the experiment. Nuclear Magnetic Resonance spectroscopy (NMR) was used to analyze the extracts. Statistical analysis of metabolomics showed significant changes between the control and head and the stem of the bean sprouts. Significant changes in metabolites were identified with the bean sprouts cultivated with germicide and growth enhancer by applying qualitative and quantitative analysis. Similar changes in the area of the bean sprouts were observed after treated to germicide and growth enhancer. Although treating germicide and growth enhancer showed no particular harmful metabolites changes to human, it made significant changes in the morphological and the metabolites of the bean sprouts. These changes indicate that the germicide and growth enhancer has substantially potential to influence the growth of the bean sprouts.
Toxicological Assessment of Microcystin-LR to Zebrafish (Danio rerio) Using Metabolomics
윤다혜,최현수,노현경,옥영준,오상아,마서희,윤창신,김석만 대한화학회 2017 Bulletin of the Korean Chemical Society Vol.38 No.4
Microcystins are one of the most frequently found hepatotoxic cyclic peptides in fresh- and brackish-water. Zebrafish (Danio rerio) were exposed to 20 ppb of microcystin-LR (MCLR) for 72 h in order to investigate the metabolic responses. Proton nuclear magnetic resonance (1H-NMR) spectroscopy was used to analyze the metabolic profiles. As a result, male and female zebrafish showed different patterns of metabolic perturbation in relation to their detoxification profiles. Glutathione was reduced for the MCLR excretion, and fumarate and creatine were increased for the energy demands required for detoxification in the male zebrafish. The correlation of metabolites in the metabolic pathway network was changed due to MCLR exposure. The correlations connected with myo-inositol, betaine, and NADPH considerably altered in the MCLR-exposed group.
1H-NMR-based Metabolomic Study of Miamiensis avidus-infected Olive Flounder
윤다혜,윤창신,최현수,노현경,옥영준,김도형,김희수,김석만 대한화학회 2017 Bulletin of the Korean Chemical Society Vol.38 No.5
The scuticociliate Miamiensis avidus (M. avidus) is an aetiological agent of mass mortalities in cultured fish worldwide. The external signs of infection by this histiophagous parasite are hemorrhage, muscle ulceration, and exophthalmia. In this study, we infected olive flounder (Paralichthys olivaceus) with M. avidus under laboratory conditions, and used1H-nuclear magnetic resonance (NMR) spectroscopy to detect the metabolomic alterations during the infection. Multivariate data analysis showed that there were distinct differences in metabolomes between the control and the infected groups. Analysis of the metabolomic changes indicated that the olive flounder experienced severe metabolic shifts to anaerobic respiration and hypoxia.