Jeju National University

Microhabitats are associated with bacterial and archaeal community structure in acid mine drainage from an abandoned mine

Acid mine drainage (AMD) is a severe environmental problem and a heterogeneous low-pH ecosystem containing diverse microbial communities. Microbial community structure across visually distinct AMD microhabitats remains poorly understood, particularly in South Korea, where field-b...

Argentine Export Tax Variation and Bilateral Agricultural Trade: Evidence on Destination Heterogeneity and Vertical Differentiation

ABSTRACT Argentina applies differentiated export taxes ( retenciones ) on agricultural commodities, and these rates have changed repeatedly since 2010. This article examines the bilateral trade effects of that variation on the taxed commodities, wheat, corn, beef, raw soybeans, s...

Non-typhoon extreme waves in the Northeast Asian Marginal Seas: Observation-based identification, synoptic conditions, and classification

This study presents an observation-based approach for identifying, characterizing, and classifying non-typhoon extreme waves in the Northeast Asian Marginal Seas using in-situ wave and wind measurements, with reanalysis data used to interpret the associated synoptic conditions. E...

Integrated LC-DAD-QToF-MS Characterization and Quantitative Profiling of Polyphenolic Metabolites in Idesia polycarpa

Idesia polycarpa, a dioecious tree distributed in East Asia, is known for its pharmacologically relevant secondary metabolites. In this study, a comprehensive phytochemical investigation was conducted to characterize and quantify the major polyphenolic metabolites across differen...

Hybrid deep learning for three-way classification of human-written, AI-generated, and AI-rephrased text

Abstract The rapid proliferation of large language models (LLMs) has made it increasingly difficult to distinguish AI-generated and AI-rephrased text from authentic human writing, posing serious risks to academic integrity, journalism, and e-commerce credibility. This paper prese...

Relationships Between Loneliness, Common Mental Disorders, and Lifetime Suicidality in a Korean Adult Population

Objective Loneliness has emerged as a significant public health concern in Korea. Recent studies suggest that loneliness may be closely associated with common mental disorders (CMDs) and suicidal thoughts and behaviors. This study evaluated associations between loneliness, CMDs,...

Prevalence and molecular profile of clonal hematopoiesis in a community-based Korean cohort: a cross-sectional analysis of the Jeju Genome Project

Clonal hematopoiesis (CH) increases with age; however, population-based Korean data defined using variant-level driver criteria remain limited. We characterized CH in a large community-based Korean whole-genome sequencing (WGS) cohort within the Jeju Genome Project (JGP). We perf...

A Retrospective Multicenter Study of Measles Seropositivity in Korea from 2014 to 2024

Background: Measles is a highly contagious viral disease requiring high herd immunity.Although the Republic of Korea has maintained measles elimination through national immunization programs, sporadic cases continue to occur.We evaluated age-and period-specific measles immunity l...

A report of 34 unrecorded bacterial species in Korea, belonging to the Actinobacteria

Ko, Kwan Su, Cha, Chang-Jun, Im, Wan-Taek, Kim, Seung-Bum, Seong, Chi-Nam, Bae, Jin-Woo, Jahng, Kwangyeop, Cho, Jang-Cheon, Joh, Ki-seong, Lee, Soon Dong (2017): A report of 34 unrecorded bacterial species in Korea, belonging to the Actinobacteria. Journal of Species Research 6 (...

Nationwide Multicenter Laboratory-Based Analysis of Varicella-Zoster Virus IgG and IgM Seropositivity in Korea, 2014–2024

Background: Varicella-zoster virus (VZV) remains an endemic, vaccine-preventable infection in Korea, despite high national vaccination coverage. Understanding long-term population immunity trends is essential for refining the disease-control and immunization policies. In this nat...

Moringa fruit shell derived carbon-hydrogel functional composite for sustainable pharmaceutical remediation and triboelectric energy harvesting

The development of sustainable, multifunctional materials that simultaneously address environmental remediation and energy generation remains a critical challenge. We developed a biodegradable, cost-effective hydrogel composite, namely Moringa fruit shell-derived activated carbon...

Vascular Imaging Features and Time-Specific Recurrence Risk After Craniocervical Artery Dissection

Background and ObjectivesCraniocervical artery dissection (CCAD) is a major cause of stroke in young adults, yet its recurrence risk remains poorly defined because of delayed enrollment in prior research. We aimed to determine the temporal distribution of recurrent ischemic strok...

Tissue-specific anthocyanin quantification, comprehensive phytochemical profiling, and chemometric analysis of fruit and aerial parts of Rubus buergeri Miq.

Rubus buergeri , a winter-fruiting species native to East Asia, remains poorly characterized phytochemically. This study presents the first comprehensive phytochemical profiling of fruits and aerial parts collected from Jeju Island, Korea. A validated ultra-high-performance liqui...

Phytochemistry and Pharmacological Evidence of East Asian Crowberry Reported as Empetrum nigrum var. japonicum or E. nigrum subsp. asiaticum: A Critical Review of Potential Chemotypic Differentiation

East Asian crowberry has been reported under Empetrum nigrum var. japonicum and E. nigrum subsp. asiaticum. This critical narrative review evaluates taxonomy, phytochemistry, and pharmacological evidence from Korean, Japanese, and Chinese source-reported material in the context o...

Unrecorded prokaryotic species belonging to the class Actinobacteria in Korea

This dataset contains the digitized treatments in Plazi based on the original journal article Kim, Mi-Sun, Jeong, Seong-Hwa, Kang, Joo-Won, Kim, Seung-Bum, Cho, Jang-Cheon, Cha, Chang-Jun, Im, Wan-Taek, Bae, Jin-Woo, Lee, Soon-Dong, Kim, Won-Yong, Kim, Myung-Kyum, Seong, Chi-Nam...

Undetected Gastric Angiodysplastic Lesion Causing Obscure Gastrointestinal Bleeding

Obscure gastrointestinal bleeding (OGIB) has traditionally been defined to as bleeding originating from the small intestine that is beyond the reach of esophagogastroduodenoscopy and colonoscopy. However, gastric lesions associated with chronic intermittent bleeding may be undete...

Changing Clinical Characteristics, Diagnostic Patterns, and Outcomes of Tuberculosis in South Korea: The Korean Tuberculosis Cohort, 2019-2024

BACKGROUND: Tuberculosis (TB) remains a public health concern in South Korea despite declining national notifications. We evaluated temporal changes in clinical characteristics, diagnostic patterns, and treatment outcomes in the Korean Tuberculosis Cohort (KTBC) from 2019 to 2024...

Restoration of glucocorticoid receptor expression by sterol-enriched Sargassum horneri attenuates particulate matter-induced epithelial stress and surfactant transcriptional alterations in alveolar type II epithelial cells

Ambient particulate matter (PM) disrupts alveolar epithelial integrity by inducing oxidative stress and inflammatory signaling. While Sargassum horneri has been reported to protect against PM-associated airway injury, whether its sterol-enriched fraction contributes to glucocorti...

A retrospective study on the diseases of roe deer in Jeju (2008-2011)

This study was carried out using 58 roe deer carcasses in Jeju from April 2008 to October 2011. According to necropsy and laboratory examinations such as pathologic, parasitic, and bacterial tests, 17 (29.3%) bacterial infections, 49 (84.5%) parasitic infections, and 14 (24.1%) n...

Bleaching Dynamics of Crustose Coralline Algae in Jeju Island, Korea

Crustose coralline algae (CCA) are key reef-building organisms, yet their bleaching dynamics and associated environmental factors in natural ecosystems remain poorly understood. This is particularly relevant to Jeju Island, Korea, where declines in canopy-forming macroalgae and t...