Hyung-Sun Kim

ORCID: 0000-0002-0204-4512
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About
Contact & Profiles
Research Areas
  • Second Language Acquisition and Learning
  • Advanced Neuroimaging Techniques and Applications
  • Neonatal and fetal brain pathology
  • EFL/ESL Teaching and Learning
  • Stroke Rehabilitation and Recovery
  • Discourse Analysis in Language Studies
  • Transcranial Magnetic Stimulation Studies
  • Language, Metaphor, and Cognition
  • Vibrio bacteria research studies
  • Salmonella and Campylobacter epidemiology
  • Vector-borne infectious diseases
  • Photoreceptor and optogenetics research
  • Color perception and design
  • EEG and Brain-Computer Interfaces
  • Advanced MRI Techniques and Applications
  • Second Language Learning and Teaching
  • Tissue Engineering and Regenerative Medicine
  • Ergonomics and Musculoskeletal Disorders
  • Anatomy and Medical Technology
  • Digital Communication and Language
  • Memory and Neural Mechanisms
  • Natural Language Processing Techniques
  • Gold and Silver Nanoparticles Synthesis and Applications
  • Molecular Biology Techniques and Applications
  • SARS-CoV-2 and COVID-19 Research

Korea Institute of Toxicology
2016-2024

Gwangju Institute of Science and Technology
2007-2017

Vellore Institute of Technology University
2011

Chosun University
2007-2010

Seonam University
2007

Gyeongsang National University
2007

Korea Research Institute of Chemical Technology
2007

Eschar is an important finding for the diagnosis of scrub typhus. The IFA test possible typhus was performed. presence or absence eschar thoroughly examined. Among 176 cases confirmed by IFA, 162 (92.0%) had eschar; 128 patients (79.5%) eschars on front body. Eschars were primarily detected in males within 30 cm below umbilicus (19 patients, 35.8%). Distributions lower extremities and chest above 22.6% (12 patients) 20.8% (11 patients), respectively. A different pattern seen females. most...

10.4269/ajtmh.2007.76.806 article EN American Journal of Tropical Medicine and Hygiene 2007-05-01

The new semiconductors that were composed of a naphthalene or anthracene core unit and alkylated thienothiophene on both sides, 2,6-bis(5'-hexyl-thieno[3,2-b]thiophen-2'-yl)naphthalene (DH-TNT) 2,6-bis(5'-hexyl-thieno[3,2-b]thiophen-2'-yl)anthracene (DH-TAT), synthesized by Suzuki coupling reaction. obtained oligomers characterized FT-IR, mass elemental analysis, UV−visible spectroscopy, cyclovoltammetry, differencial scanning calorimetry, thermogravimetric analysis. Vacuum-evaporated films...

10.1021/cm070053g article EN Chemistry of Materials 2007-06-01

ABSTRACT Orientia tsutsugamushi is the causative agent of scrub typhus. For diagnosis typhus, we investigated performances conventional PCR (C-PCR), nested (N-PCR), and real-time quantitative (Q-PCR) targeting O. -specific 47-kDa gene. To compare detection sensitivities three techniques, used two template systems that plasmid DNA (plasmid sensitivity), including a partial region gene, genomic (genomic sensitivity) from buffy coat sample single patient. The C-PCR, N-PCR, Q-PCR were 5 × 10 4...

10.1128/jcm.01216-09 article EN Journal of Clinical Microbiology 2010-11-11

The purpose of this study is to find the optimal stiffness and volume bone cement their biomechanical effects on adjacent vertebrae determine a better strategy for conducting vertebroplasty.A three-dimensional finite-element model functional spinal unit was developed using computed tomography scans normal motion segment, comprising T11, T12 L1 vertebrae. Volumes cement, with appropriate mechanical properties, were inserted into trabecular core vertebra. Parametric studies done by varying...

10.3340/jkns.2012.52.5.435 article EN cc-by-nc Journal of Korean Neurosurgical Society 2012-01-01

Understanding light intensity and temperature increase is of considerable importance in designing or performing vivo optogenetic experiments. Our study describes the optimal power at target depth rodent brain that would maximize activation light-gated ion channels while minimizing increase. Monte Carlo (MC) simulations delivery were used to provide a guideline for suitable depth. In addition, MC with Pennes bio-heat model using data obtained from measurements temperature-measuring cannula...

10.1364/boe.7.004450 article EN cc-by Biomedical Optics Express 2016-10-06

We present a new method for inducing circumscribed subcortical capsular infarct (SCI), which imposes persistent motor impairment in rats. Photothrombotic destruction of the internal capsule (IC) was conducted Sprague Dawley rats (male; n=38). The performance all animals assessed using forelimb placing, use asymmetry, and single pellet reaching test. On basis degree recovery, were subdivided into either poor recovery group (PRG) or moderate (MRG). Imaging assessment impact SCI on brain...

10.1038/jcbfm.2014.2 article EN Journal of Cerebral Blood Flow & Metabolism 2014-01-29

We conducted a prospective study to target toxR in the blood of patients with skin and soft tissue infections who were admitted four tertiary hospitals assess clinical usefulness real-time quantitative PCR (Q-PCR) as diagnostic technique. performed conventional (C-PCR), nested (N-PCR), Q-PCR assays compared results those obtained using "gold standard" microbiological culture. The lower detection limit for assay was 5 x 10(0) copies/microl. By use samples infections, sensitivities C-PCR N-PCR...

10.1128/jcm.00027-08 article EN Journal of Clinical Microbiology 2008-07-10

Strokes attributable to subcortical infarcts have been increasing recently in elderly patients. To gain insight how this lesion influences the motor outcome and responds rehabilitative training, we used circumscribed photothrombotic capsular infarct models on 36 Sprague-Dawley rats (24 experimental 12 sham-operated). We 2-deoxy-2-[(18)F]-fluoro-D-glucose-micro positron emission tomography (FDG-microPET) assess longitudinal changes resting-state brain activity (rs-BA) daily single-pellet...

10.1038/jcbfm.2014.178 article EN Journal of Cerebral Blood Flow & Metabolism 2014-10-29

The global shortage of human blood for medical use has prompted the development alternative sources. Nonhuman primates (NHPs) are commonly used owing to their physiological similarities humans. objective current study was establish a controlled-blood-loss model in NHPs explore clinical and biological responses.

10.3389/fimmu.2023.1286632 article EN cc-by Frontiers in Immunology 2024-01-10

The prevalence of subcortical white matter strokes in elderly patients is on the rise, but these show mixed responses to conventional rehabilitative interventions. To examine whether cortical electrical stimulation can promote motor recovery after stroke, we delivered a small or wide region sensory-parietal cortex for two weeks rodent model circumscribed capsular infarct. sham-operated group (SOG) showed persistent and severe impairments together with decreased activation bilateral...

10.1177/0271678x15606136 article EN Journal of Cerebral Blood Flow & Metabolism 2015-12-04

Recent increase in the prevalence rate of white matter stroke demands specific research field. However, lack a pertinent animal model for has hampered investigations. Here, we describe novel method creating circumscribed capsular infarct that minimizes damage to neighboring gray structures. We used pre-surgery neural tracing with adeno-associated virus-green fluorescent protein (AAV-GFP) identify somatotopic organization forelimb area within internal capsule. The adjustment light intensity...

10.3791/53281 article EN Journal of Visualized Experiments 2016-06-02

Background: Stroke involving the cerebral white matter (WM) has increased in prevalence, but most experimental studies have focused on ischemic injury of gray matter.This study was performed to investigate WM a unique rat model photothrombotic infarct targeting posterior limb internal capsule (PLIC), focusing identification vulnerable structure by injury, subsequent glial reaction and fundamental histopathologic feature causing different neurologic outcomes.Methods: Light microscopy with...

10.4132/jptm.2017.02.17 article EN cc-by-nc Journal of Pathology and Translational Medicine 2017-05-11

Abstract ATB1651 gel is an antifungal drug candidate that enhances activity through substitution of several aryl rings, alkyl chains, and methyl groups. To ensure safety use gel, assessment its potentially toxic side effects necessary. In this study, we examined the repeated-dose toxicity to Yucatan minipigs (Sus scrofa) in accordance with Good Laboratory Practice guidelines. Five doses (0%, 0.2%, 0.5%, 1.0%, 3.0%) were administered dermally left right flanks 38 daily for 4 weeks. Mortality,...

10.1007/s43188-023-00222-z article EN cc-by Toxicological Research 2024-02-06

The brain grows with age in non-human primates (NHPs). Therefore, atlas-based stereotactic coordinates cannot be used directly to target subcortical structures if the size of animal's differs from that atlas. Furthermore, growth is non-uniform across different cortical regions, making it difficult simply apply a single brain-expansion ratio. We determined skull reference lines best reflect changes along X, Y, and Z axes plotted reference-line length against body weight. had linear...

10.5607/en.2019.28.3.425 article EN Experimental Neurobiology 2019-06-30

Recent increase in the prevalence rate of white matter stroke demands specific research field. However, lack a pertinent animal model for has hampered investigations. Here, we describe novel method creating circumscribed capsular infarct that minimizes damage to neighboring gray structures. We used pre-surgery neural tracing with adeno-associated virus-green fluorescent protein (AAV-GFP) identify somatotopic organization forelimb area within internal capsule. The adjustment light intensity...

10.3791/53281-v article EN Journal of Visualized Experiments 2016-06-02

Diclofenac sodium salt (DSS) is a widely used nonsteroidal anti-inflammatory drug. The present study was performed under good laboratory practice (GLP) regulations to investigate the toxicity of DSS after 4 weeks repeated intramuscular administration at doses 0, 2, 10, or 20 mg/kg/day in 32 minipigs and evaluate effect following 2-week recovery period. Dose-related clinical signs alterations hematological chemistry parameters, organ weight, macroscopic as well histopathological findings...

10.1016/j.toxrep.2021.02.022 article EN cc-by Toxicology Reports 2021-01-01

The claustrum, a brain nucleus located between the cortex and striatum, has recently been highlighted in drug-related reward processing. Methyl CpG-binding protein-2 (MeCP2) is transcriptional regulator that represses or activates expression of target gene known to have an important role regulation drug addiction dopaminergic system. claustrum region for regulating processing where most neurons receive dopamine input; additionally, this region, MeCP2 also abundantly expressed. Therefore,...

10.5607/en22034 article EN Experimental Neurobiology 2022-12-31
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