Publications by authors named "Hyunyoung Jo"
Article Synopsis
- - The study analyzed changes in particulate matter (PM) in Northeast Asia, focusing on emission reduction efforts following two major air quality campaigns in 2016 and 2022 around the Korean Peninsula, using ground, aircraft measurements, and simulations.
- - Significant reductions in air pollutants were observed, with PM and sulfur dioxide (SO) concentrations in the Beijing-Tianjin-Hebei region dropping by 47.2% and 73.9%, respectively, due to effective emission strategies, also reflecting similar trends in Seoul.
- - WRF-Chem model results indicated overall decreases in particulate pollutants, with shifts in their formation processes and transport patterns, revealing that the dominant factor for improving air quality was enhanced emission reduction measures rather than
Article Synopsis
- The study investigated high concentrations of particulate matter (PM) after a cold front passed in January 2018, using the WRF and CMAQ models to analyze the meteorological and pollution changes.
- The analysis divided the event into two stages, noting that Stage 2 had a higher contribution from vertical advection due to atmospheric conditions after the cold front compared to Stage 1.
- Key findings included the impact of meteorological factors like temperature drops and increased wind and humidity on PM levels, highlighting how varying synoptic patterns can alter air pollution dynamics in the region.
Article Synopsis
- The WRF-CMAQ model was evaluated during the KORUS-AQ 2016 campaign, focusing on anthropogenic chlorine (Cl) emissions and their effects on air quality in the Korean Peninsula.
- High gas-particle partitioning ratios at aircraft measurement altitudes led to significant underestimations of Cl concentrations, though the model’s predictions for nitryl chloride (ClNO) chemistry were more accurate.
- The introduction of Cl emissions improved model performance for nitrate formation, showcasing that activated ClNO chemistry was key in enhancing oxidation processes, particularly in the early morning when hydroperoxyl and hydroxyl radicals dominated.
Article Synopsis
- Eleven new Flavobacterium bacterial strains were isolated from freshwater and identified through gene sequencing, revealing distinct characteristics and genome sizes.
- The average nucleotide identity analysis showed that two strains belong to the same species, while the others represent separate novel species, each exhibiting low genetic similarity with known Flavobacterium species.
- The study proposes ten new species, including Flavobacterium praedii and Flavobacterium marginilacus, based on genomic, phylogenetic, and phenotypic evaluations, confirming their uniqueness from existing species.
Northeast Asia has been suffering from dramatic increases of particulate matter (PM) since the late 1990s, and it still continues to undergo haze despite various abating regulations. In this study, we investigated aerosol-cloud-precipitation (ACP) interactions with the varied PM, and the impact of long-range transport (LRT) process on ACP in springtime was assessed in Northeast Asia. Our long-term (1995-2019) analysis of PM exhibited the correlation with decreases of both sunshine duration and drizzle occurrences that can be interpreted as direct and indirect aerosol effects, while cloud cover induced by the varied PM was found only in more than 90% cloud cover (9/10-10/10 category).
View Article and Find Full Text PDFTo forecast haze pollution episodes caused by high concentrations of long-range transported pollutants emitted in the areas upstream of South Korea, it is crucial to study and identify their behaviour. We analysed the three-dimensional air quality structure in Seoul using ground observation data and aerosol lidar measurements to identify vertical aerosol intrusion into the Korean Peninsula during the spring of 2016. The intrusions were particularly affected by the development of the atmospheric boundary layer (ABL) in the leeward regions.
View Article and Find Full Text PDFBackground: Both air pollution and weather impact hospitalization for respiratory diseases. However, few studies have investigated the contribution of weather to hospitalization related to the adverse effects of air pollution. This study analyzed the effects of particulate matter (PM) on daily respiratory-related hospital admissions, taking into account meteorological factors.
View Article and Find Full Text PDFRapid diagnostic tests (RDTs) can detect anti-malaria antibodies in human blood. As they can detect parasite infection at the low parasite density, they are useful in endemic areas where light infection and/or re-infection of parasites are common. Thus, malaria antibody tests can be used for screening bloods in blood banks to prevent transfusion-transmitted malaria (TTM), an emerging problem in malaria endemic areas.
View Article and Find Full Text PDFThe combination of therapeutic nucleic acids and chemotherapeutic drugs has shown great promise for cancer therapy. In this study, asialoglycoprotein receptors (ASGPR) targeting-ligand-based liposomes were tested to determine whether they can co-deliver vimentin siRNA and doxorubicin to hepatocellular carcinoma (HCC) selectively. To achieve this goal, we developed an ASGPR receptor targeted co-delivery system called gal-doxorubicin/vimentin siRNA liposome (Gal-DOX/siRNA-L).
View Article and Find Full Text PDFObjective: Little is known about the characteristic differences in alexithymic construct in various psychiatric disorders because of a paucity of direct comparisons between psychiatric disorders. Therefore, this study explored disorder-related differences in alexithymic characteristics among Korean patients diagnosed with four major psychiatric disorders (n=388).
Methods: Alexithymic tendencies, as measured by the Korean version of the 20-item Toronto Alexithymia Scale (TAS-20K), of patients classified into four groups according to major psychiatric diagnosis were compared.