박예나 교수

Objectives: This study was conducted to identify factors determining the toxicity of manufactured silver nano-particles (AgNPs) on aquatic organisms. Methods: For this purpose, we prepared several AgNPs with varied characteristics, including hydrodynamic size (nano-<TEX>$^{ABC}Ag^{Cit}\;vs$</TEX>-sized-<TEX>$^{ABC}Ag^{Cit}$</TEX>), impurities (<TEX>$^{ABC}Ag$</TEX> stock vs <TEX>$^{ABC}Ag$</TEX>), and citrate capping (<TEX>$^{ABC}Ag^{Cit}$</TEX>), using a commercially available manufactured AgNP

As concerns regarding water pollution grow, the need increases for a fast and accurate assessment of ecological risk. In this context, many studies have been conducted to identify biomarkers which can sensitively indicate exposure to and effects of various contaminants in a water environment. However, the utility of most such biomarkers in the real water environment is not yet validated. In this paper, we conducted a thorough review of publications that were related to developing or evaluating m

Acute and chronic toxicities of sediment elutriate and surface water samples collected at Lake Shihwa were evaluated using standard toxicity testing organisms including Vibrio fischeri, Daphnia magna and Moina macrocopa. Acute exposure resulted in toxic effects in all surface water or sediment elutriate samples, except for those collected from the reed swamp and Okgu stream. The rainy season influenced the toxicity of the water samples, presumably either by dilution of point discharge or through

Can we resolve the unemployment volatility puzzle (Shimer 2005) despite the cyclical opportunity cost of employment? Chodorow-Reich and Karabarbounis (2016) found that the opportunity cost of employment is highly procyclical, which poses significant challenges to the models of labor market fluctuations. Introducing procyclical opportunity cost inevitably weakens wage rigidity regardless of the exact types of wage bargaining, and it dampens the labor market volatility. We study the roles of the u