Publications by authors named "K S Ra"

Mercury (Hg) is a contaminant that poses health risks for human populations relying on seafood consumption. To mitigate its impact, identifying and monitoring Hg sources have become priorities, notably under the Minamata Convention. Bivalves are commonly used as sentinels in contaminant biomonitoring but can accumulate Hg from diverse environmental media.

View Article and Find Full Text PDF

This study investigated the spatial distribution and chemical characteristics of potentially toxic elements (PTEs) in road-deposited sediments (RDS) at the Port of Busan by size fraction. Enrichment factor (EF) values for Zn, Cd, and Sb in fine RDS <250 μm were 52-69, 49-78, and 46-44, respectively, indicating 'extremely high enrichment'. Various statistical analyses, including PCA and PMF models, revealed a strong correlation between pollution levels in RDS <250 μm and vehicle type, identifying non-exhaust emissions (NEE) of vehicles as a primary source of PTEs in RDS from the port.

View Article and Find Full Text PDF
Article Synopsis
  • - Polymetallic nodules on the seafloor contain valuable metals, but their leachates can harm marine ecosystems during mining operations by affecting marine organisms.
  • - The study focused on the marine copepod Tigriopus koreanus, examining how exposure to these leachates influences mortality, development, fecundity, and specific gene expressions related to detoxification and reproduction.
  • - While there were no significant changes in mortality, the leachates shortened developmental time and increased fecundity, with certain metals like manganese and iron showing a positive impact on copepod development when combined with others.
View Article and Find Full Text PDF

This study examines the impact of status inconsistency on status-threatening activities within NCAA Division I men's basketball teams. Specifically, we focus on a nested form of status that includes both individual and group-level elements. We argue that organizations dealing with status inconsistency stemming from such nested form face challenges in reducing status inconsistency.

View Article and Find Full Text PDF

This study investigates the applicability of elemental and Cu isotope compositions in sediments and bivalves from the Korean coast to monitor anthropogenic Cu contamination. Sediments with high Cu (>64.4 mg/kg) and/or moderate enrichment levels (EF) exhibit homogenous δCu values (-0.

View Article and Find Full Text PDF