Ho-Seok Kwak

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It is accepted that blood phosphatidylethanol (PEth) concentrations are reliable biomarkers of ethanol (alcohol) exposure. We therefore conducted a preliminary study to test the hypothesis that(More)
Vitamin D2 (ergocalciferol) and D3 (cholecalciferol) can be procured from exogenous sources. These are then metabolized to 25-hydroxyvitamin D (25OHD2 and 25OHD3) in the liver. Measuring the levels(More)
OBJECTIVES The aim was to investigate the effect of -maternal smoking exposure assessed by urinary tobacco-specific nitrosamine metabolite 4-(methylnitrosamino)-1-(3-pyridyl)-a1-butanol (NNAL) with(More)
Fetal lung maturity is estimated using the lecithin/sphingomyelin ratio (L/S ratio) in amniotic fluid and it is commonly measured with thin-layer chromatography (TLC). The TLC method is time(More)
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