Publications by authors named "Young Yun"

Donor-acceptor dyads are promising materials for improving triplet-sensitized photon upconversion due to faster intramolecular energy transfer (ET), which unfortunately competes with charge transfer (CT) dynamics. To circumvent the issue associated with CT, we propose a novel purely organic donor-acceptor dyad, where the CT character is confined within the donor moiety. In this work, we report the synthesis and characterization of a stable organic radical donor-triplet acceptor dyad () consisting of the acceptor perylene () linked to the donor (4--carbazolyl-2,6-dichlorophenyl)-bis(2,4,6-trichlorophenyl)methyl radical ().

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  • Optimizing the educational experience in otologic surgery is crucial due to the complexities of ear anatomy and challenges in video quality during surgical viewings.* -
  • The study aimed to enhance the quality of tympanomastoidectomy surgical videos using AI techniques and assessed their effectiveness through trainee feedback.* -
  • Results indicated that AI-enhanced videos significantly aided trainees in understanding procedures, especially for those with less experience, making surgical education more effective.*
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Individuals diagnosed with advanced cancer often experience stress and depression, factors linked to worse survival. Curability belief-defined as the hope and expectation of cure through treatment, based on affective forecasting-may differ from the patient's actual life expectancy (i.e.

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Background: Air pollution may exacerbate diabetes-related indicators; however, the longitudinal associations between air pollutant concentrations and glycemic markers remain unclear. In this prospective cohort study, we examined the longitudinal associations between air pollution and glycemic indicators among older individuals with normoglycemia at baseline and determined whether these associations differed according to changes in physical activity levels.

Methods: Overall, 1,856 participants (mean age, 70.

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Stroke, a leading cause of death and disability, lacks effective treatments. Post-stroke secondary damage worsens the brain microenvironment, further exacerbating brain injury. Microglia's role in responding to stroke-induced damage in peri-infarct regions is crucial.

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Anion exchange membrane water electrolysis (AEMWE) offers a sustainable path for hydrogen production with advantages such as high current density, dynamic responsiveness, and low-cost electrocatalysts. However, the development of efficient and durable oxygen evolution reaction (OER) electrocatalysts under operating conditions is crucial for achieving the AEMWE. This study systematically investigated Fe-Co-Ni ternary amorphous electrocatalysts for the OER in AEMWE through a comprehensive material library system comprising 21 composition series.

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Importance: Limited data suggest that early palliative care (EPC) improves quality of life (QOL) and survival in patients with advanced cancer.

Objective: To evaluate whether comprehensive EPC improves QOL; relieves mental, social, and existential burdens; increases survival rates; and helps patients develop coping skills.

Design, Setting, And Participants: This nonblinded randomized clinical trial (RCT) recruited patients from 12 hospitals in South Korea from September 2017 to October 2018.

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In recent years, human anatomy education has faced challenges with traditional donor dissection, leading to the emergence of virtual dissection as an alternative. This study aims to investigate the academic performance and satisfaction of medical students by comparing the virtual and donor dissections. An open-labeled crossover randomized controlled trial was conducted with 154 first-year medical students in Human Anatomy and Neuroanatomy laboratories, which were divided into three classes.

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Purpose: To investigate the toxicity of type I interferons (IFNs) on the ocular surface and assess their efficacy in ocular surface tumors.

Methods: We examined the effects of IFN-α2a, IFN-α2b and IFN-β on corneal epithelial cells and stromal fibroblasts in vitro as well as the impact of IFN-α2a on the ocular surface in mice. Additionally, we analyzed the therapeutic and adverse effects of topically administered IFN-α2a and IFN-α2b in patients with ocular surface tumors.

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Glucagon-like peptide-1 (GLP-1) receptor agonists (GLP-1RAs) are effective antiobesity drugs. However, the precise central mechanisms of GLP-1RAs remain elusive. We administered GLP-1RAs to patients with obesity and observed a heightened sense of preingestive satiation.

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  • The study focuses on enhancing the lithium deposition process on lithium foil-based anodes to prevent unsafe, high-aspect-ratio lithium shapes that can occur when reaction kinetics are slow.
  • Researchers analyze the kinetics of lithium deposition through various real-time and detailed electrochemical methods, aiming to uncover the limitations of current processes.
  • They develop ultra-thin double-walled carbon nanotube membranes that promote safer lithium deposition by creating numerous lithium nuclei, leading to uniform deposition and prolonged battery cycling performance, even under high current densities.
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Backgruound: The Korean Endocrine Hormone Reference Standard Data Center (KEHRS DC) has created reference standards (RSs) for endocrine hormones since 2020. This study is the first of its kind, wherein the KEHRS DC established RSs for serum Cpeptide levels in a healthy Korean population.

Methods: Healthy Korean adults were recruited from May 2021 to September 2023.

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  • * A study tested the effects of a novel herbal complex called LK5, which has anti-inflammatory properties, on HaCaT cells and in a mouse model of AD.
  • * Results showed that LK5 reduced expression of inflammatory cytokines, improved clinical symptoms in mice, and inhibited itch, indicating its potential to modulate the immune response and alleviate AD symptoms by targeting the JAK-STAT pathway.
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Background: Although the survival outcomes of childhood cancer patients have improved, childhood cancer survivors suffer from various degrees of immune dysfunction or delayed immune reconstitution. This study aimed to investigate the effect of Korean Red Ginseng (KRG) on T cell recovery in childhood cancer patients who underwent autologous hematopoietic stem cell transplantation (ASCT) from the perspective of inflammatory and senescent phenotypes.

Methods: This was a single-arm exploratory trial.

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Migrant workers face challenging working conditions, resulting in physical and mental vulnerability. The objective is to identify their health vulnerabilities and ensure their right to health. Health records of 163 migrant workers (113 males and 50 females) (Group A) and 163 Korean citizens (Group B) visiting our institution were analyzed from August 2021 to July 2022.

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Poly-aromatic systems that contain quinodimethyl (QDM) units are appealing for several photonic and spintronic applications owing to the unique electronic structure, aromaticity, and spin state(s) of the QDM ring. Herein, we report the synthesis and characterization of novel QDM-based chromophores 1-3, which exhibit unique photo-excited behavior and aromaticity. Extending the aromatic core with a biphenyl/phenanthryl- and a pyrrolo-fragment led to reducing the optoelectronic bandgap and modulating the photophysics QDM 1-3.

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An innovative and efficient approach has been developed for the synthesis of 5,6-dihydropyrazolo[5,1-]isoquinolines. This one-pot tandem reaction involves the reaction of ,-cyclic azomethine imines with α,β-unsaturated ketones, using KCO as the base and DDQ as the oxidant. The process results in functionalized 5,6-dihydropyrazolo[5,1-]isoquinolines with good yields.

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Minor changes to side chains in conjugated polymers (CPs) can have pronounced effects on polymer properties by altering backbone planarity, solubility, and interaction with ions. Here, we report the photocontrolled synthesis of hydrophilic CPs from Grignard monomers and find that switching from alkyl to oligo(ethylene glycol) (OEG) side chains changes their photoreactivity. Specifically, installing hydrophilic side chains on the same monomer core yields higher molecular weight polymers and allows polymerization to proceed with lower-energy red light.

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The association between health-related role limitations in the mental and physical subdomains and clinical status (i.e., chronic disease and comorbid depressive symptoms) is mediated by health-promoting behaviors.

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Guillain-Barré syndrome (GBS) is an autoimmune disease that is generally preceded by an infection. Its typical symptoms are progressive symmetric paresis and an absence of deep tendon reflexes. GBS could be a life-threatening condition due to the paralysis of respiratory muscles, and admission to the intensive care unit should be considered for close monitoring.

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1,3-Dipolar cycloadditions of ,-cyclic azomethine imines with γ-NHTs-α,β-unsaturated ketones were developed to synthesize tricyclic dinitrogen-fused heterocycles. Highly functionalized tricyclic tetrahydroisoquinolines were readily obtained in good to high yields in the [3 + 2]-cycloaddition reaction of -Bz-protected ,-cyclic azomethine imines with γ-NHTs-α,β-unsaturated ketones under mild reaction conditions. Moreover, DABCO-catalyzed cycloaddition of -Ts-protected ,-cyclic azomethine imines with γ-NHTs-α,β-unsaturated ketones followed by cleavage of the tosyl group is a convenient route to synthesize tetrahydropyrazolo [5,1-]isoquinolines in good yields with excellent diastereoselectivities.

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  • The voltage profiles of hard carbon anodes during lithiation and sodiation show a sloping drop followed by a plateau, but the exact redox sites and storage mechanisms are not fully understood, limiting commercial development.
  • A comparison of lithium- and sodium-ion storage reveals that the sloping section is due to lithium intercalation in graphitic lattices, while sodium's sloping part is from chemisorption on closed pore surfaces.
  • The findings also show that the plateau capacities for both alkali ions depend on different factors—sodium capacity relies on the closed pore volume, and lithium capacity is influenced by intercalation ability, highlighting an inverse relationship between intercalation preference and capacity.
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This study aimed to investigate the risk factors for glaucoma conversion and progression in eyes with large optic disc cupping without retinal nerve fiber layer defect (RNFLD). Five hundred forty-two eyes of 271 subjects who had a vertical cup-to-disc ratio (CDR) ≥ 0.6 without RNFLD were enrolled.

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Purpose: We aimed to examine different effects of the current capability of and changes in self-management strategies on improving health behavior and psychological health (satisfaction of life, depression, and anxiety) after 6 months in cancer patients.

Methods: A prospective cohort study was conducted, including 540 cancer patients. We measured cancer patients' self-management strategies' capability with Smart Management Strategies for Health (SMASH) Assessment Tool (SAT) baseline scores and changes with SMASH change scores based on a clinically meaningful 10% change of the scores.

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