96,219 results match your criteria: "Seoul national University[Affiliation]"

Marine and terrestrial organisms often utilise EGF/EGF-like domains in wet adhesives, yet their roles in adhesion remain unclear. Here, we investigate the Barbatia virescense byssal system and uncover an oxidation-independent, reversible, and robust adhesion mechanism where EGF/EGF-like domain tandem repetitions in adhesive proteins bind robustly to GlcNAc-based biopolymer. EGF/EGF-like-domain-containing proteins demonstrate over three-fold superior underwater adhesion to chitosan compared to the well-known strongest wet-adhesive proteins, mefp-5, and suckerin, when adhering to mica in an surface forces apparatus-based measurement.

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Passive and active suppression of transduced noise in silicon spin qubits.

Nat Commun

January 2025

Department of Physics and Astronomy, and Institute of Applied Physics, Seoul National University, Seoul, Korea.

Addressing and mitigating decoherence sources plays an essential role in the development of a scalable quantum computing system, which requires low gate errors to be consistently maintained throughout the circuit execution. While nuclear spin-free materials, such as isotopically purified silicon, exhibit intrinsically promising coherence properties for electron spin qubits, the omnipresent charge noise, when converted to magnetic noise under a strong magnetic field gradient, often hinders stable qubit operation within a time frame comparable to the data acquisition time. Here, we demonstrate both open- and closed-loop suppression techniques for the transduced noise in silicon spin qubits, resulting in a more than two-fold (ten-fold) improvement of the inhomogeneous coherence time (Rabi oscillation quality) that leads to a single-qubit gate fidelity of over 99.

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Effect of nanoparticulate CaCO on the biological properties of calcium silicate cement.

Sci Rep

January 2025

Department of Dental Biomaterials Science, Dental Research Institute, School of Dentistry, Seoul National University, 101 Daehak-ro, Jongno-gu, Seoul, 03080, South Korea.

This study aimed to evaluate the effects of nanoparticulate CaCO (NPCC) on the biological properties of calcium silicate-based cements (CSCs), including their cytotoxicity, in vitro osteogenic activity, and interactions with rat femur tissue. The average size of NPCC was 90.3±26.

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Association between genetically predicted leisure and social activities and cardiovascular disease and other health outcomes.

Nat Cardiovasc Res

January 2025

Samsung Advanced Institute for Health Sciences and Technology (SAIHST), Sungkyunkwan University, Samsung Medical Center, Seoul, South Korea.

Participation in leisure and social activities (LSA) is associated with better health outcomes and lower mortality. Previous observational studies demonstrated a relationship between engagement in LSA and both mental and physical health. Although several studies examined the association between LSA and health outcomes, including cardiovascular disease, their possible causal relationship has not been studied.

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Understanding how symmetry-breaking processes generate order out of disorder is among the most fundamental problems of nature. The scalar Higgs mode - a massive (quasi-) particle - is a key ingredient in these processes and emerges with the spontaneous breaking of a continuous symmetry. Its related exotic and elusive axial counterpart, a Boson with vector character, can be stabilized through the simultaneous breaking of multiple continuous symmetries.

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The recent sea ice changes in the Northern Hemisphere (NH), necessitate elucidating the sea ice variability over the past 2.6 million years (Ma), when the Earth's glacial cycles transitioned from ∼41 to ∼100 kyr periodicity, following the Mid-Pleistocene Transition (MPT) period (0.7-1.

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Molecular Display of the Animal Meta-Venome for Discovery of Novel Therapeutic Peptides.

Mol Cell Proteomics

December 2024

Institute for Cell Engineering, Division of Immunology, Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA. Electronic address:

Animal venoms, distinguished by their unique structural features and potent bioactivities, represent a vast and relatively untapped reservoir of therapeutic molecules. However, limitations associated with comprehensively constructing and expressing highly complex venom and venom-like molecule libraries have precluded their therapeutic evaluation via high throughput screening. Here, we developed an innovative computational approach to design a highly diverse library of animal venoms and "metavenoms".

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Protective effects of methylnissolin and methylnissolin-3-O-β-d-glucopyranoside on TNF-α-induced inflammation in human dermal fibroblasts.

Toxicol In Vitro

December 2024

Department of Preventive Medicine, College of Korean Medicine, Gachon University, Seongnam 13120, Republic of Korea. Electronic address:

Methylnissolin-3-O-β-d-glucopyranoside (MNG) and methylnissolin (MN) are pterocarpan derivatives that are found in plants, such as Astragalus membranaceus. There are limited existing studies on the potential health benefits of MNG, and currently there is no evidence to suggest that MNG has any impact on skin-aging. Tumor necrosis factor-alpha (TNF-α) plays a significant role in skin aging by promoting chronic inflammation, damaging skin cells, and impairing the skin's natural repair mechanisms.

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Efficient separation and preconcentration of nanoparticles are crucial in a wide range of biomedical applications, particularly as target substances continue to diminish in size. In this study, we introduce an electric field-assisted membrane system that synergistically combines oversized-pore membranes with an electrokinetic particle retention mechanism. Utilizing Ti/Au-coated poly(tetrafluoroethylene) (PTFE) membranes, our approach generates electrokinetic forces to effectively separate and retain charged nanoparticles even smaller than the pores, achieving a separation efficiency over 99% and a preconcentration factor of 1.

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Correction: (Thio)chromenone derivatives exhibit anti-metastatic effects through selective inhibition of uPAR in cancer cell lines: discovery of an uPAR-targeting fluorescent probe.

Chem Commun (Camb)

January 2025

Center for Metareceptome Research, Graduate School of Pharmaceutical Sciences, Chung-Ang University, 84 Heukseok-ro, Dongjak, Seoul 06974, Republic of Korea.

Correction for '(Thio)chromenone derivatives exhibit anti-metastatic effects through selective inhibition of uPAR in cancer cell lines: discovery of an uPAR-targeting fluorescent probe' by So-Young Chun , , 2025, https://doi.org/10.1039/D4CC05907G.

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It remains unclear why unilateral proximal carotid artery occlusion (UCAO) causes benign oligemia in mice, yet leads to various outcomes (asymptomatic-to-death) in humans. We hypothesized that inhibition of nitric oxide synthase (NOS) both transforms UCAO-mediated oligemia into full infarction and expands pre-existing infarction. Using 900 mice, we i) investigated stroke-related effects of UCAO with/without intraperitoneal administration of the NOS inhibitor (NOSi) N-nitro-L-arginine methyl ester (L-NAME, 400 mg/kg); ii) examined the rescue effect of the NO-donor, molsidomine (200 mg/kg at 30 minutes); and iii) tested the impact of antiplatelet medications.

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Artificial intelligence application in endodontics: A narrative review.

Imaging Sci Dent

December 2024

Department of Conservative Dentistry, Faculty of Dentistry, Universitas Sumatera Utara, Medan, Indonesia.

Purpose: This review aimed to explore the scientific literature concerning the methodologies and applications of artificial intelligence (AI) in the field of endodontics. The findings may equip dentists with the necessary technical knowledge to understand the opportunities presented by AI.

Materials And Methods: Articles published between 1992 and 2023 were retrieved through an electronic search of Medline via the PubMed, Scopus, and Google Scholar databases.

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Preliminary report: Protective effects of probiotics on cefovecin-induced gut dysbiosis in dogs.

Can J Vet Res

January 2025

Laboratory of Veterinary Dermatology (Han, Hwang) and Research Institute for Veterinary Science (Han, Mun, Hwang), College of Veterinary Medicine, Seoul National University, Seoul, Republic of Korea; ORIGIN Veterinary Dermatology Clinic, Busan, Republic of Korea (Kang); Department of Companion Animal Health Care, College of Medical Health, Kyungbok University, Namyangju, Republic of Korea (Kim S-J); Department of Large Animal Internal Medicine, College of Veterinary Medicine, Kangwon National University, Chuncheon, Republic of Korea (Kim Y-H).

The objective of this study was to evaluate whether supplementation with probiotics over a 2-week period stabilizes the gut microbiota in dogs following prolonged cefovecin treatment. A significant number of clinical veterinarians prescribe oral probiotics to dogs in conjunction with systemic antibiotics with the intention of protecting against gut dysbiosis. The effects of antibiotics and probiotics in dogs have not been extensively studied, however, and the optimal treatment for gut dysbiosis remains uncertain.

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Hypoxia is a major obstacle in the treatment of solid tumors because it causes immune escape and therapeutic resistance. Drug penetration into the hypoxic regions of tumor microenvironment (TME) is extremely limited. This study proposes using the unidirectional fluid flow property of low-intensity pulsed ultrasound (LIPUS) to overcome drug penetration limitations in the TME.

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ConspectusWhile traditional quantum chemical theories have long been central to research, they encounter limitations when applied to complex situations. Two of the most widely used quantum chemical approaches, Density Functional Theory (DFT) and Time-Dependent Density Functional Theory (TDDFT), perform well in cases with relatively weak electron correlation, such as the ground-state minima of closed-shell systems (Franck-Condon region). However, their applicability diminishes in more demanding scenarios.

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Article Synopsis
  • Pedicle ossification is a rare complication that can occur after using a fibular free flap (FFF) for mandibular reconstruction, potentially simulating tumor recurrence and leading to diagnostic challenges.
  • A case study of a 38-year-old male with squamous cell carcinoma highlighted how postoperative complications led to the need for FFF reconstruction, and over 4 years, CT scans showed ossification in the flap's vascular pedicle, yet the patient remained asymptomatic.
  • Regular imaging and clinical assessments are key to distinguishing ossification from tumor recurrence, with surgery usually only considered if symptoms arise.
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Article Synopsis
  • The study aimed to assess the long-term outcomes of one-piece narrow-diameter implants (NDIs) and identify factors influencing marginal bone loss (MBL) around them.
  • The analysis involved 25 patients and 40 NDIs over an average of 10.5 years, with a high survival rate of 95.1% for implants and a mean MBL of 0.44 mm, primarily linked to the use of guided bone regeneration (GBR).
  • The findings suggest that NDIs perform well clinically over time, showing acceptable MBL, but further research with larger samples is recommended to confirm these results.
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Current options in jaw and facial reconstructions.

J Korean Assoc Oral Maxillofac Surg

December 2024

Department of Oral and Maxillofacial Surgery, Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Korea.

In recent years, many advances have been made in surgical fields of oral and maxillofacial reconstruction, and the variety and complexity of available surgical approaches consider different functionalities of the jaw and the aesthetics of the face. There is no validated or scientifically proven basis for deciding which flap to use for reconstruction, so decisions are often made based on the direct and indirect experiential knowledge of the reconstructive surgeon. Considering the modified ladder, elevator, and pie reconstructive options, their risk and donor morbidity, and their long-term outcomes, the simplest option that will achieve the best long-term outcome in terms of form and function and with the lowest donor morbidity should be chosen for the patient's health and social welfare.

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Trends and perspectives in minimally invasive surgery in oral and maxillofacial surgery.

J Korean Assoc Oral Maxillofac Surg

December 2024

Department of Oral and Maxillofacial Surgery, Seoul National University Dental Hospital, School of Dentistry, Seoul National University, Seoul, Korea.

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Purpose: To investigate the dietary factors affecting male lower urinary tract symptoms (LUTS).

Materials And Methods: This retrospective study analyzed men who underwent health check-ups. The men who completed the International Prostate Symptom Score (IPSS) and a dietary questionnaire with 19 items were included in the study.

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Objectives: This study compared the clinical accuracy of two different stationary face scanners, employing progressive capture and multi-view simultaneous capture scanning technologies.

Methods: Forty dentate volunteers participated in the study. Soft tissue landmarks were marked with a pen on the participants' faces to measure the distances between them.

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