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Stander S, Kim BS, Guillemin I, Rhoten S, Wratten S, Brookes E, O'Malley JT, Bansal A, Msihid J, Thomas R, Bahloul D. Estimating meaningful change thresholds for Skin Pain-Numeric Rating Scale, Sleep-Numeric Rating Scale and Dermatology Life Quality Index in patients with prurigo nodularis. J Eur Acad Dermatol Venereol 2024. [PMID: 38329222 DOI: 10.1111/jdv.19800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Accepted: 11/21/2023] [Indexed: 02/09/2024]
Abstract
BACKGROUND Prurigo nodularis (PN) is characterized by intensely itchy nodules/lesions and skin pain, which can have a substantial impact on health-related quality of life (HRQoL). Treatment benefits on such symptoms and impacts are best assessed in trials using patient-reported outcome (PROs) instruments such as Skin Pain Numerical Rating Scale (NRS), Sleep-NRS and Dermatology Life Quality Index (DLQI). However, no guidance exists for interpreting meaningful changes in scores using these PROs in patients with PN. OBJECTIVES The main objective was to derive within-patient (responder definition) and between-group improvement thresholds for interpreting Skin Pain-NRS, Sleep-NRS and DLQI total scores in patients with PN. The measurement properties of the three PROs were also evaluated. METHODS Intention-to-treat (ITT), blinded and pooled data were used from the Phase 3 PRIME (NCT04183335) and PRIME2 (NCT04202679) studies evaluating the efficacy of dupilumab in adult patients with PN. Anchor- and distribution-based methods were applied to derive responder definition and between-group thresholds for Skin Pain-NRS, Sleep-NRS and DLQI. Data were additionally used to examine the instrument measurement properties, including reliability, validity and responsiveness. RESULTS A total of 311 patients (mean age 49.5 years, 65.3% female) were included in the pooled ITT population. The within-patient improvement threshold for Skin Pain-NRS was estimated as 4.0 points, 2.0 points for Sleep-NRS and 9.0 points for DLQI total score. A 1.5-point improvement in Skin Pain-NRS scores, 1.0-point in Sleep-NRS and 4.0-point in DLQI indicated a between-group meaningful change. Adequate to good psychometric properties were demonstrated for all three instruments. CONCLUSIONS The results of this study can aid interpretation of Skin Pain-NRS, Sleep-NRS and DLQI scores in patients with PN in both clinical trials and clinical practice to better understand and treat PN-related skin pain and the impact of PN on sleep quality and HRQoL.
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Affiliation(s)
- S Stander
- University Clinic Münster, Münster, Germany
| | - B S Kim
- Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | | | - S Rhoten
- IQVIA, San Francisco, California, USA
| | | | | | | | - A Bansal
- Regeneron, Tarrytown, New York, USA
| | | | - R Thomas
- Regeneron, Tarrytown, New York, USA
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2
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Lim CM, Choi SW, Kim BS, Lee SJ, Kang HS. Dynamic Fixation versus Static Screw Fixation for Syndesmosis Injuries in Pronation External Rotation Ankle Fractures: A Retrospective Case Control Study. Malays Orthop J 2023; 17:48-58. [PMID: 38107359 PMCID: PMC10723001 DOI: 10.5704/moj.2311.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Accepted: 12/02/2022] [Indexed: 12/19/2023] Open
Abstract
Introduction The current standard treatment for ankle syndesmosis injury is static screw fixation. Dynamic fixation was developed to restore the dynamic function of the syndesmosis. The purpose of this study was to determine that which of static screw fixation and dynamic fixation is better for treatment of ankle syndesmosis injury in pronation-external rotation fractures. Materials and methods Thirty patients were treated with dynamic fixation (DF group) and 28 patients with static screw fixation (SF group). The primary outcome was Olerud-Molander Ankle Outcome Score. The secondary outcome were Visual Analogue Scale score and American Orthopedic Foot and Ankle Society score, radiographic outcomes, complications and cost effectiveness. To evaluate the radiographic outcome, the tibiofibular clear space, tibiofibular overlap, and medial clear space were compared using the pre-operative and last follow-up plain radiographs. To evaluate the cost effectiveness, the total hospital cost was compared between the two groups. Results There was no significant difference in primary outcome. Moreover, there were no significant difference in secondary outcome including Visual Analogue Scale score and American Orthopedic Foot and Ankle Society score and radiographic outcome. Two cases of reduction loss and four cases of screw breakage were observed in the SF group. No complication in the DF group was observed. Dynamic fixation was more cost effective than static screw fixation with respect to the total hospital cost. Conclusion Although dynamic fixation provided similar clinical and radiologic outcome, dynamic fixation is more cost effective with fewer complications than static screw fixation in ankle syndesmosis injury of pronation-external rotation fractures.
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Affiliation(s)
- C M Lim
- Department of Orthopaedic Surgery, Jeju National University Hospital, Jeju, South Korea
| | - S W Choi
- Department of Orthopaedic Surgery, Jeju National University Hospital, Jeju, South Korea
| | - B S Kim
- Department of Orthopaedic Surgery, Jeju National University Hospital, Jeju, South Korea
| | - S J Lee
- Department of Orthopaedic Surgery, Jeju National University Hospital, Jeju, South Korea
| | - H S Kang
- Department of Orthopaedic Surgery, Jeju National University Hospital, Jeju, South Korea
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Jiao T, Kim BS, Guo P, Li B. Self-Assembled Nanocomposites and Nanostructures for Environmental and Energic Applications. Nanomaterials (Basel) 2023; 13:220. [PMID: 36677973 PMCID: PMC9866243 DOI: 10.3390/nano13020220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Accepted: 12/26/2022] [Indexed: 06/17/2023]
Abstract
With the rapid development of nanotechnology, nanocomposites and nanostructures have attracted significant attention due to their unique physical and chemical properties and variable functionalities [...].
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Affiliation(s)
- Tifeng Jiao
- School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, China
| | - Byoung-Suhk Kim
- Department of Organic Materials & Fiber Engineering, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si 54896, Republic of Korea
| | - Peizhi Guo
- Institute of Materials for Energy and Environment, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, China
| | - Bingbing Li
- Department of Chemistry and Biochemistry, Central Michigan University, Mount Pleasant, MI 48859, USA
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Kim DY, Ma CH, Jang Y, Radhakrishnan S, Ko TH, Kim BS. A simple and green approach to develop porous carbons from biomass lignin for advanced asymmetric supercapacitors. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.129785] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Choi YJ, Kim BS, Rhee TM, Lee HJ, Lee H, Park JB, Lee SP, Han KD, Kim YJ, Hk KIM. Augmented risk of ischemic stroke in hypertrophic cardiomyopathy patients without documented atrial fibrillation. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.1734] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Ischemic stroke is a common complication in patients with hypertrophic cardiomyopathy (HCM) (1). Although atrial fibrillation (AF) is a well-established risk factor for ischemic stroke in HCM, the risk of ischemic stroke in patients with HCM without documented AF is less recognized (1, 2). This study aimed to determine the risk of ischemic stroke and identify its risk factors in patients with HCM without documented AF.
Methods
This nationwide population-based cohort study used the Korean National Health Insurance database. After excluding patients with a prior history of AF, thromboembolic events, cancer, or the use of anticoagulants, we identified 8,328 HCM patients without documented AF and 1:2 propensity score-matched 16,656 non-HCM controls. The clinical outcome was an incident ischemic stroke.
Results
During a mean follow-up of approximately 6 years, ischemic stroke occurred in 328/8,328 (3.9%) patients with HCM and 443/16,656 (2.7%) controls. Among individuals who developed ischemic stroke, the proportion of AF concomitantly detected accounted for 26.5% (87/328) and 5.8% (26/443) in the HCM and control groups, respectively. The overall incidence of ischemic stroke was 0.716/100 person-years in the HCM group, which was significantly higher than that in the control group (0.44/100 person-years) (HR 1.643; 95% CI, 1.424–1.895; P<0.001, Figure 1). The subgroup analysis according to age, sex, and comorbidities (chronic heart failure, hypertension, dyslipidemia, and vascular disease) consistently demonstrated a higher risk of ischemic stroke in the HCM group (P for interaction >0.05). In the HCM group, age ≥65 years (adjusted hazard ratio [HR] 2.741; 95% confidence interval [CI], 2.156–3.486; P<0.001) and chronic heart failure (adjusted HR 1.748; 95% CI, 1.101–2.745; P=0.018) were independent risk factors for ischemic stroke. Overall incidence was 1.360/100 in patients with HCM aged ≥65 and 2.315/100 person-years years in those with chronic heart failure, respectively. Also, compared to controls aged <65 years and without CHF, adjusted HR for ischemic stroke was 4.756 (95% CI 3.807–5.867) in patients with HCM aged ≥65 years and 2.539 (95% CI 1.638–3.936) in those with CHF, respectively (Figure 2).
Conclusions
Patients with HCM without documented AF are at a higher risk of ischemic stroke than the propensity score-matched general population. Age ≥65 years and chronic heart failure are two strong independent risk factors for ischemic stroke in this population.
Funding Acknowledgement
Type of funding sources: None.
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Affiliation(s)
- Y J Choi
- Korea University Guro Hospital , Seoul , Korea (Democratic People's Republic of)
| | - B S Kim
- The Catholic University of Korea , Seoul , Korea (Republic of)
| | - T M Rhee
- Seoul National University Hospital, Internal medicine , Seoul , Korea (Republic of)
| | - H J Lee
- Seoul National University Hospital, Internal medicine , Seoul , Korea (Republic of)
| | - H Lee
- Seoul National University Hospital, Internal medicine , Seoul , Korea (Republic of)
| | - J B Park
- Seoul National University Hospital, Internal medicine , Seoul , Korea (Republic of)
| | - S P Lee
- Seoul National University Hospital, Internal medicine , Seoul , Korea (Republic of)
| | - K D Han
- The Catholic University of Korea , Seoul , Korea (Republic of)
| | - Y J Kim
- Seoul National University Hospital, Internal medicine , Seoul , Korea (Republic of)
| | - K I M Hk
- Seoul National University Hospital, Internal medicine , Seoul , Korea (Republic of)
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Kim BS, Lee Y, Shin JH. Impact of estimated pulse wave velocity on cardiovascular outcomes in a general population. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.2832] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract
Background
Estimated pulse wave velocity (ePWV), a simple surrogate estimate of carotid-femoral pulse wave velocity which was gold standard for measuring aortic stiffness, has been demonstrated to predict cardiovascular (CV) outcome. However, there was limited data on its predictive capacity for CV outcomes in the general population. The study aim was to investigate the independent association between ePWV and CV outcomes in general population.
Methods
A total of 10,030 subjects aged between 40 and 69 years were followed over 18-year period in the Ansan-Ansung cohort study. Levels of ePWV, which was calculated from an equation based on age and mean blood pressure, were categorized according to quartiles. A major adverse cardiovascular event (MACE) was defined as a composite of myocardial infarction, coronary artery disease, stroke, heart failure, peripheral artery disease, and cardiovascular death.
Results
The incidence rates of CV death, and MACE were 7.0% and 22.1% in the fourth (highest) quartile of ePWV and 0.1% and 4.5% in the first (lowest) quartile of ePWV. After adjusting for relevant covariates, patients with third and fourth quartile of ePWV showed significantly higher risk of CV death (hazard ratio [HR] 3.92; 95% confidence intervals [CI] 1.09–14.15 in third quartile and HR 8.53; 95% CI 2.13–34.10 in fourth quartile), and MACE (HR 1.54; 95% CI 1.15–2.08 in third quartile and HR 1.56; 95% CI 1.05–2.32) compared to the reference of first (lowest) quartile of ePWV. However, there were no improvement of C statistic for CV death and MACE when adding ePWV to the Cox regression models with 10-year atherosclerotic cardiovascular disease (ASCVD) risk.
Conclusion
These results suggest that ePWV predicted CV death and MACE in general population. The value of ePWV, a simple and useful indicator of aortic stiffness, is expected to serve as a potential marker to identify high risk groups of CV event in general population.
Funding Acknowledgement
Type of funding sources: None.
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Affiliation(s)
- B S Kim
- Hanyang University Guri Hospital , Guri , Korea (Republic of)
| | - Y Lee
- Hanyang University Guri Hospital , Guri , Korea (Republic of)
| | - J H Shin
- Hanyang University Guri Hospital , Guri , Korea (Republic of)
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Lee Y, Shin JH, Kim BS, Kim WH, Kook H, Park HC. Influence of concomitant percutaneous transluminal angioplasty with percutaneous coronary intervention on outcomes in patients with stable lower extremity artery disease. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.1974] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Patients with stable lower extremity artery diseases (LEAD) frequently present with coronary artery diseases; thus, concomitant percutaneous transluminal angioplasty (PTA) at the time of percutaneous coronary intervention (PCI) is often performed. We investigated the influence of concomitant PTA on both cardiovascular (CV) and limb outcomes in the Korean National Health Insurance Service registry.
Methods
Among 78,185 patients undergoing PCI between 2012 and 2015, 6,563 patients (279 for the PTA+PCI group vs. 6,284 for the PCI group) suffering from stable LEAD without limb ischemia were included. Major adverse CV events (MACEs) were defined as a composite of CV death, myocardial infarction (MI) and coronary revascularization. Patients were followed for at least 3 years.
Results
After 1:5 propensity score matching was conducted, 279 patients in the PTA+PCI group and 1,385 patients in the PCI group were compared. The risk of all-cause death was higher in the PTA+PCI group than in the PCI group, whereas the risks of MACE, MI, revascularization, stroke, CV death and bleeding event were not different between the 2 groups in the matched cohort. In contrast, the risks of end-stage renal diseases and unfavorable limb outcomes were higher in the PTA+PCI group than in the PCI group (Figure 1). Mediation analyses revealed that amputation and repeat Percutaneous transluminal angioplasty after discharge significantly mediated the association between the concomitant PTA and all-cause death (Figure 2).
Conclusions
CPTA at the time of PCI is not associated with an increased risk of CV events but may increase the risk of all-cause death by increasing unfavorable renal and limb outcomes in patients with stable LEAD.
Funding Acknowledgement
Type of funding sources: None.
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Affiliation(s)
- Y Lee
- Hanyang University, Division of Cardiology, Department of internal medicine , Seoul , Korea (Republic of)
| | - J H Shin
- Hanyang University, Division of Cardiology, Department of internal medicine , Seoul , Korea (Republic of)
| | - B S Kim
- Hanyang University Guri Hospital , Seoul , Korea (Republic of)
| | - W H Kim
- Hanyang University, Division of Cardiology, Department of internal medicine , Seoul , Korea (Republic of)
| | - H Kook
- Hanyang University, Division of Cardiology, Department of internal medicine , Seoul , Korea (Republic of)
| | - H C Park
- Hanyang University, Division of Cardiology, Department of internal medicine , Seoul , Korea (Republic of)
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Yang JY, Ko TH, Kuk YS, Seo MK, Kim BS. A Facile Fabrication of Ordered Mesoporous Carbons Derived from Phenolic Resin and Mesophase Pitch via a Self-Assembly Method. Nanomaterials 2022; 12:nano12152686. [PMID: 35957116 PMCID: PMC9370532 DOI: 10.3390/nano12152686] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/02/2022] [Revised: 07/29/2022] [Accepted: 08/03/2022] [Indexed: 12/10/2022]
Abstract
Ordered and disordered mesoporous structures were synthesized by a self-assembly method using a mixture of phenolic resin and petroleum-based mesophase pitch as the starting materials, amphiphilic triblock copolymer F127 as a soft template, hydrochloric acid as a catalyst, and distilled water as a solvent. Then, mesoporous carbons were obtained via autoclave method at low temperature (60 °C) and then carbonization at a relatively low temperature (600 °C), respectively. X-ray diffraction (XRD), small-angle X-ray scattering (SAXS), and transmission electron microscopy (TEM) analyses revealed that the porous carbons with a mesophase pitch content of approximately 10 wt% showed a highly ordered hexagonal mesostructure with a highly uniform pore size of ca. 5.0 nm. In addition, the mesoporous carbons prepared by self-assembly and low-temperature autoclave methods exhibited the amorphous or crystalline carbon structures with higher specific surface area (SSA) of 756 m2/s and pore volume of 0.63 cm3/g, depending on the synthesis method. As a result, mesoporous carbons having a high SSA were successfully prepared by changing the mixing ratio of mesophase pitch and phenolic resin. The electrochemical properties of as-obtained mesoporous carbon materials were investigated. Further, the OMC-meso-10 electrode delivered the maximum SC of about 241 F/g at an applied current density of 1 A/g, which was higher than those of the MC-10 (~104 F/g) and OMC-20 (~115 F/g).
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Affiliation(s)
- Jae-Yeon Yang
- Convergence Research Division, Korea Carbon Industry Promotion Agency (KCARBON), 110-11 Banryong-ro, Deokjin-gu, Jeonju-si 54853, Jeollabuk-do, Korea
| | - Tae Hoon Ko
- Department of Nano Convergence Engineering, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si 54896, Jeollabuk-do, Korea
| | - Yun-Su Kuk
- Convergence Research Division, Korea Carbon Industry Promotion Agency (KCARBON), 110-11 Banryong-ro, Deokjin-gu, Jeonju-si 54853, Jeollabuk-do, Korea
| | - Min-Kang Seo
- Convergence Research Division, Korea Carbon Industry Promotion Agency (KCARBON), 110-11 Banryong-ro, Deokjin-gu, Jeonju-si 54853, Jeollabuk-do, Korea
- Correspondence: (M.-K.S.); (B.-S.K.); Tel.: +82-063-270-2352 (M.K.S. & B.S.K.)
| | - Byoung-Suhk Kim
- Department of Organic Materials & Fiber Engineering, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si 54896, Jeollabuk-do, Korea
- Correspondence: (M.-K.S.); (B.-S.K.); Tel.: +82-063-270-2352 (M.K.S. & B.S.K.)
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9
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Krishnaraj C, Radhakrishnan S, Ramachandran R, Ramesh T, Kim BS, Yun SI. In vitro toxicological assessment and biosensing potential of bioinspired chitosan nanoparticles, selenium nanoparticles, chitosan/selenium nanocomposites, silver nanoparticles and chitosan/silver nanocomposites. Chemosphere 2022; 301:134790. [PMID: 35504473 DOI: 10.1016/j.chemosphere.2022.134790] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Revised: 04/15/2022] [Accepted: 04/27/2022] [Indexed: 05/20/2023]
Abstract
Hydrogen peroxide (H2O2) is widely used in various industries and biological fields. H2O2 rapidly contaminants with water resources and hence simple detection process is highly wanted in various fields. The present study was focused on the biosensing, antimicrobial and embryotoxicity of bioinspired chitosan nanoparticles (Cs NPs), selenium nanoparticles (Se NPs), chitosan/selenium nanocomposites (Cs/Se NCs), silver nanoparticles (Ag NPs) and chitosan/silver nanocomposites (Cs/Ag NCs) synthesized using the aqueous Cucurbita pepo Linn. leaves extract. The physico-chemical properties of as-synthesized nanomaterials were confirmed by various spectroscopic and microscopic techniques. Further, hydrogen peroxide (H2O2) sensing properties and their sensitivities were confirmed by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and chronoamperometry (CA) methods, in which Cs/Ag NCs showed pronounced sensing properties. In addition, the mode of antibacterial interaction results clearly demonstrated the effective inhibitory activity of as-prepared Ag NPs and Cs/Ag NCs against Gram negative pathogenic bacteria. The highest embryotoxicity was recorded at 0.19 μg/ml of Ag NPs and 1.56 μg/ml of Se NPs. Intriguingly, the embryo treated with Cs/Se NCs and Cs/Ag NCs significantly reduced the toxicity in the presence of Cs matrix. However, Cs/Se NCs did not show good response in H2O2 sensing than the Cs/Ag NCs, implying the biocompatibility of Cs/Ag NCs. Overall, the obtained results clearly suggest that Cs/Ag NCs could be suitable for dual applications such as for the detection of environmental pollutant biosensors and for biomedical research.
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Affiliation(s)
- Chandran Krishnaraj
- Department of Food Science and Technology, College of Agriculture and Life Sciences, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do, 54896, Republic of Korea; Department of Agricultural Convergence Technology, College of Agriculture and Life Science, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do, 54896, Republic of Korea.
| | - Sivaprakasam Radhakrishnan
- Department of Organic Materials & Fiber Engineering, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do, 54896, Republic of Korea
| | - Rajan Ramachandran
- Laboratory of Functional Molecules and Materials, School of Physics and Optoelectronic Engineering, Shandong University of Technology, Zibo, 255000, Shandong, China
| | - Thiyagarajan Ramesh
- Department of Basic Medical Sciences, College of Medicine, Prince Sattam Bin Abdulaziz University, Al-Kharj, 11942, Saudi Arabia
| | - Byoung-Suhk Kim
- Department of Organic Materials & Fiber Engineering, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do, 54896, Republic of Korea; Department of Carbon Composites Convergence Materials Engineering, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do, 54896, Republic of Korea
| | - Soon-Il Yun
- Department of Food Science and Technology, College of Agriculture and Life Sciences, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do, 54896, Republic of Korea; Department of Agricultural Convergence Technology, College of Agriculture and Life Science, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do, 54896, Republic of Korea.
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Moore SL, Ciccarino CJ, Halbertal D, McGilly LJ, Finney NR, Yao K, Shao Y, Ni G, Sternbach A, Telford EJ, Kim BS, Rossi SE, Watanabe K, Taniguchi T, Pasupathy AN, Dean CR, Hone J, Schuck PJ, Narang P, Basov DN. Nanoscale lattice dynamics in hexagonal boron nitride moiré superlattices. Nat Commun 2021; 12:5741. [PMID: 34593793 PMCID: PMC8484559 DOI: 10.1038/s41467-021-26072-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2021] [Accepted: 09/02/2021] [Indexed: 11/12/2022] Open
Abstract
Twisted two-dimensional van der Waals (vdW) heterostructures have unlocked a new means for manipulating the properties of quantum materials. The resulting mesoscopic moiré superlattices are accessible to a wide variety of scanning probes. To date, spatially-resolved techniques have prioritized electronic structure visualization, with lattice response experiments only in their infancy. Here, we therefore investigate lattice dynamics in twisted layers of hexagonal boron nitride (hBN), formed by a minute twist angle between two hBN monolayers assembled on a graphite substrate. Nano-infrared (nano-IR) spectroscopy reveals systematic variations of the in-plane optical phonon frequencies amongst the triangular domains and domain walls in the hBN moiré superlattices. Our first-principles calculations unveil a local and stacking-dependent interaction with the underlying graphite, prompting symmetry-breaking between the otherwise identical neighboring moiré domains of twisted hBN. Here, the authors investigate the lattice dynamics of twisted hexagonal boron nitride layers via nano-infrared spectroscopy, showing local and stacking-dependent variations of the optical phonon frequencies associated to the interaction with the graphite substrate.
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Affiliation(s)
- S L Moore
- Department of Physics, Columbia University, New York, NY, USA.
| | - C J Ciccarino
- John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, USA
| | - D Halbertal
- Department of Physics, Columbia University, New York, NY, USA
| | - L J McGilly
- Department of Physics, Columbia University, New York, NY, USA
| | - N R Finney
- Department of Mechanical Engineering, Columbia University, New York, NY, USA
| | - K Yao
- Department of Mechanical Engineering, Columbia University, New York, NY, USA
| | - Y Shao
- Department of Physics, Columbia University, New York, NY, USA
| | - G Ni
- Department of Physics, Columbia University, New York, NY, USA
| | - A Sternbach
- Department of Physics, Columbia University, New York, NY, USA
| | - E J Telford
- Department of Physics, Columbia University, New York, NY, USA
| | - B S Kim
- Department of Mechanical Engineering, Columbia University, New York, NY, USA
| | - S E Rossi
- Department of Physics, Columbia University, New York, NY, USA
| | - K Watanabe
- National Institute for Materials Science, 1-1 Namiki, Tsukuba, Japan
| | - T Taniguchi
- National Institute for Materials Science, 1-1 Namiki, Tsukuba, Japan
| | - A N Pasupathy
- Department of Physics, Columbia University, New York, NY, USA
| | - C R Dean
- Department of Physics, Columbia University, New York, NY, USA
| | - J Hone
- Department of Mechanical Engineering, Columbia University, New York, NY, USA
| | - P J Schuck
- Department of Mechanical Engineering, Columbia University, New York, NY, USA
| | - P Narang
- John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, USA
| | - D N Basov
- Department of Physics, Columbia University, New York, NY, USA
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Ma MJ, Seong JG, Radhakrishnan S, Ko TH, Kim BS. Preparation of Network-Structured Carbon Nanofiber Mats Based on PAN Blends Using Electrospinning and Hot-Pressing Methods for Supercapacitor Applications. Nanomaterials (Basel) 2021; 11:2447. [PMID: 34578763 PMCID: PMC8467548 DOI: 10.3390/nano11092447] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Revised: 09/16/2021] [Accepted: 09/18/2021] [Indexed: 11/29/2022]
Abstract
In this work, we prepared network-structured carbon nanofibers using polyacrylonitrile blends (PAN150 and PAN85) with different molecular weights (150,000 and 85,000 g mol-1) as precursors through electrospinning/hot-pressing methods and stabilization/carbonization processes. The obtained PAN150/PAN85 polymer nanofibers (PNFs; PNF-73, PNF-64 and PNF-55) with different weight ratios of 70/30, 60/40 and 50/50 (w/w) provided good mechanical and electrochemical properties due to the formation of physically bonded network structures between the blended PAN nanofibers during the hot-processing/stabilization processes. The resulting carbonized PNFs (cPNFs; cPNF-73, cPNF-64, and cPNF-55) were utilized as anode materials for supercapacitor applications. cPNF-73 exhibited a good specific capacitance of 689 F g-1 at 1 A g-1 in a three-electrode set-up compared to cPNF-64 (588 F g-1 at 1 A g-1) and cPNF-55 (343 F g-1 at 1 A g-1). In addition, an asymmetric hybrid cPNF-73//NiCo2O4 supercapacitor device also showed a good specific capacitance of 428 F g-1 at 1 A g-1 compared to cPNF-64 (400 F g-1 at 1 A g-1) and cPNF-55 (315 F g-1 at 1 A g-1). The cPNF-73-based device showed a good energy density of 1.74 W h kg-1 (0.38 W kg-1) as well as an excellent cyclic stability (83%) even after 2000 continuous charge-discharge cycles at a current density of 2 A g-1.
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Affiliation(s)
- Min-Jung Ma
- Department of Organic Materials & Fiber Engineering, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si 54896, Jeollabuk-do, Korea; (M.-J.M.); (J.-G.S.); (S.R.)
- Department of Carbon Composites Convergence Materials Engineering, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si 54896, Jeollabuk-do, Korea
| | - Jae-Gyoung Seong
- Department of Organic Materials & Fiber Engineering, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si 54896, Jeollabuk-do, Korea; (M.-J.M.); (J.-G.S.); (S.R.)
| | - Sivaprakasam Radhakrishnan
- Department of Organic Materials & Fiber Engineering, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si 54896, Jeollabuk-do, Korea; (M.-J.M.); (J.-G.S.); (S.R.)
| | - Tae-Hoon Ko
- Department of Nano Convergence Engineering, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si 54896, Jeollabuk-do, Korea
| | - Byoung-Suhk Kim
- Department of Organic Materials & Fiber Engineering, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si 54896, Jeollabuk-do, Korea; (M.-J.M.); (J.-G.S.); (S.R.)
- Department of Carbon Composites Convergence Materials Engineering, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si 54896, Jeollabuk-do, Korea
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Margolis DJ, Mitra N, Duke JL, Berna R, Margolis JD, Hoffstad O, Kim BS, Yan AC, Zaenglein AL, Chiesa Fuxench Z, Dinou A, Wasserman J, Tairis N, Mosbruger TL, Ferriola D, Damianos G, Kotsopoulou I, Monos DS. Human leukocyte antigen class-I variation is associated with atopic dermatitis: A case-control study. Hum Immunol 2021; 82:593-599. [PMID: 33875297 PMCID: PMC8238855 DOI: 10.1016/j.humimm.2021.04.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 03/23/2021] [Accepted: 04/04/2021] [Indexed: 12/21/2022]
Abstract
Atopic dermatitis (AD) is a common immune-medicated skin disease. Previous studies have explored the relationship between Human Leukocyte Antigen (HLA) allelic variation and AD with conflicting results. The aim was to examine HLA Class I genetic variation, specifically peptide binding groove variation, and associations with AD. A case-control study was designed to evaluate HLA class I allelic variation and binding pocket polymorphisms, using next generation sequencing on 464 subjects with AD and 388 without AD. Logistic regression was used to evaluate associations with AD by estimating odds ratios (95% confidence intervals). Significant associations were noted with susceptibility to AD (B*53:01) and protection from AD (A*01:01, A*02:01, B*07:02 and C*07:02). Evaluation of polymorphic residues in Class I binding pockets revealed six amino acid residues conferring protection against AD: A9F (HLA-A, position 9, phenylalanine) [pocket B/C], A97I [pocket C/E], A152V [pocket E], A156R [pocket D/E], B163E [pocket A] and C116S [pocket F]. These findings demonstrate that specific HLA class I components are associated with susceptibility or protection from AD. Individual amino acid residues are relevant to protection from AD and set the foundation for evaluating potential HLA Class I molecules in complex with peptides/antigens that may initiate or interfere with T-cell responses.
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Affiliation(s)
- D J Margolis
- Department of Biostatistics, Epidemiology and Informatics, Perelman School of Medicine, Philadelphia, PA, United States; Department of Dermatology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States.
| | - N Mitra
- Department of Biostatistics, Epidemiology and Informatics, Perelman School of Medicine, Philadelphia, PA, United States
| | - J L Duke
- Department of Pathology and Laboratory Medicine, Children's Hospital of Philadelphia, Philadelphia, PA, United States
| | - R Berna
- Department of Dermatology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States
| | - J D Margolis
- Department of Biostatistics, Epidemiology and Informatics, Perelman School of Medicine, Philadelphia, PA, United States
| | - O Hoffstad
- Department of Biostatistics, Epidemiology and Informatics, Perelman School of Medicine, Philadelphia, PA, United States
| | - B S Kim
- Division of Dermatology, Department of Medicine, Center for the Study of Itch, Washington University School of Medicine, St. Louis, MO, United States
| | - A C Yan
- Division of Dermatology, Department of Medicine, Center for the Study of Itch, Washington University School of Medicine, St. Louis, MO, United States
| | - A L Zaenglein
- Departments of Dermatology and Pediatrics, Pennsylvania State University/Hershey Medical Center, Hershey, PA, United States
| | - Z Chiesa Fuxench
- Department of Dermatology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States
| | - A Dinou
- Department of Pathology and Laboratory Medicine, Children's Hospital of Philadelphia, Philadelphia, PA, United States
| | - J Wasserman
- Department of Pathology and Laboratory Medicine, Children's Hospital of Philadelphia, Philadelphia, PA, United States
| | - N Tairis
- Department of Pathology and Laboratory Medicine, Children's Hospital of Philadelphia, Philadelphia, PA, United States
| | - T L Mosbruger
- Department of Pathology and Laboratory Medicine, Children's Hospital of Philadelphia, Philadelphia, PA, United States
| | - D Ferriola
- Department of Pathology and Laboratory Medicine, Children's Hospital of Philadelphia, Philadelphia, PA, United States
| | - Georgios Damianos
- Department of Pathology and Laboratory Medicine, Children's Hospital of Philadelphia, Philadelphia, PA, United States
| | - Ioanna Kotsopoulou
- Department of Pathology and Laboratory Medicine, Children's Hospital of Philadelphia, Philadelphia, PA, United States
| | - D S Monos
- Department of Pathology and Laboratory Medicine, Children's Hospital of Philadelphia, Philadelphia, PA, United States; Department of Pathology and Laboratory Medicine, Perelman Schools of Medicine, University of Pennsylvania, Philadelphia, PA, United States.
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13
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Jeon BJ, Kang JE, Park MY, Kim BS. Antifungal activity of streptavidin C1 and C2 against pathogens causing Fusarium wilt. Lett Appl Microbiol 2021; 73:453-459. [PMID: 34214198 DOI: 10.1111/lam.13533] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 06/28/2021] [Accepted: 06/29/2021] [Indexed: 11/29/2022]
Abstract
Fusarium wilt is caused by the soil-inhabiting fungus Fusarium oxysporum ff. spp. and is one of the most devastating plant diseases, resulting in losses and decreasing the quality and safety of agricultural crops. We recently reported the structures and biochemical properties of two biotin-binding proteins, streptavidin C1 and C2 (isolated from Streptomyces cinnamonensis strain KPP02129). In the present study, the potential of the biotin-binding proteins as antifungal agent for Fusarium wilt pathogens was investigated using recombinant streptavidin C1 and C2. The minimum inhibitory concentration of streptavidin C2 was found to be 16 µg ml-1 for inhibiting the mycelial growth of F. oxysporum f.sp. cucumerinum and F. oxysporum f.sp. lycopersici, while that of streptavidin C1 was found to be 64 µg ml-1 . Compared with the nontreated control soil, the population density of F. oxysporum f.sp. lycopersici in the soil was reduced to 49·5% and 39·6% on treatment with streptavidin C1 (500 µg ml-1 ) and C2 (500 µg ml-1 ), respectively. A greenhouse experiment revealed that Fusarium wilt of tomato plants was completely inhibited on soil drenching using a 50-ml culture filtrate of the streptavidin-producing strain KPP02129.
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Affiliation(s)
- B J Jeon
- Department of Plant Biotechnology, Korea University Graduate School, Seoul, South Korea
| | - J E Kang
- Department of Plant Biotechnology, Korea University Graduate School, Seoul, South Korea.,Department of Plant Biotechnology, Institute of Life Science and Natural Resources, Korea University, Seoul, South Korea
| | - M Y Park
- Department of Plant Biotechnology, Korea University Graduate School, Seoul, South Korea.,Materials Research Team, Central Research Institute of Kyung Nong Corporation, Gyungju, Gyungbuk, South Korea
| | - B S Kim
- Department of Plant Biotechnology, Korea University Graduate School, Seoul, South Korea.,Division of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul, South Korea
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Bae HJ, Park YK, Cho DY, Choi JH, Kim BS, Shin YS. Predictors of the Effects of Flow Diversion in Very Large and Giant Aneurysms. AJNR Am J Neuroradiol 2021; 42:1099-1103. [PMID: 33926897 PMCID: PMC8191680 DOI: 10.3174/ajnr.a7085] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Accepted: 12/24/2020] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE The treatment paradigm for very large and giant aneurysms has recently changed to flow diversion, in light of the results of the Pipeline for Uncoilable or Failed Aneurysms trial. However, the effects of flow diversion were definitely unknown. We explored this topic and identified the predictors of such effects. MATERIALS AND METHODS We retrospectively reviewed 51 patients with unruptured aneurysms admitted to our institution for flow diversion between February 2014 and August 2019. Patients were categorized into an effect group (no filling or remnant entry) and a no-effect group (subtotal or total filling). We evaluated the aneurysm size and shape, incorporation vessel, parent artery stenosis and curvature, stagnation of contrast medium within the aneurysm, use of balloon angioplasty, and intra-aneurysm thrombus as potential predictors of the effects of flow diversion. RESULTS The effect group comprised 34 patients (66.7%, 34/51; no filling, 35.3%, 18/51; and remnant entry, 31.4%, 16/51). The no-effect group comprised 17 patients (33.3%, 17/51; subtotal filling, 29.4%, 15/51; and total filling, 3.9%, 2/51). An incorporation vessel and balloon angioplasty were independent risk factors for the no-effect group in multivariate logistic regression analyses (OR = 0.13 and 0.05; 95% confidence intervals, 0.02-0.62 and 0.00-0.32; P values, .021 and .004, respectively). CONCLUSIONS Flow diversion is effective for very large and giant aneurysms, but the outcomes require further improvement. The results of this study show that an incorporated vessel and excessive balloon angioplasty might compromise flow diversion. This finding can help improve the outcomes of flow diversion.
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Affiliation(s)
- H J Bae
- From the Department of Neurosurgery (H.J.B.), Yeouido St. Mary's Hospital, The Catholic University of Korea College of Medicine, Seoul, Korea
| | - Y K Park
- Department of Neurosurgery (Y.K.P.), Inje University Ilsan Paik Hospital, Goyang, Korea
| | - D Y Cho
- Department of Neurosurgery (D.Y.C.), Ewha Womans University, Seoul, Korea
| | - J H Choi
- Department of Neurosurgery (J.H.C., Y.S.S.), Seoul St. Mary's Hospital, The Catholic University of Korea College of Medicine. Seoul, Republic of Korea
| | - B S Kim
- Department of Radiology (B.S.K.), Seoul St. Mary's Hospital, The Catholic University of Korea College of Medicine, Seoul, Korea
| | - Y S Shin
- Department of Neurosurgery (J.H.C., Y.S.S.), Seoul St. Mary's Hospital, The Catholic University of Korea College of Medicine. Seoul, Republic of Korea
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15
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Acharya J, Ojha GP, Kim BS, Pant B, Park M. Modish Designation of Hollow-Tubular rGO-NiMoO 4@Ni-Co-S Hybrid Core-shell Electrodes with Multichannel Superconductive Pathways for High-Performance Asymmetric Supercapacitors. ACS Appl Mater Interfaces 2021; 13:17487-17500. [PMID: 33844490 DOI: 10.1021/acsami.1c00137] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The scrupulous designation of hollow and porous electroactive materials incorporating prolific redox-active polyphase transition-metal oxide decorated with polyphase transition-metal sulfide onto rGO (reduced graphene oxide)-supported conductive substrate has never been an easy task due to the very good coordination affair of sulfur toward transition metals. Herein, cost-effective hydrothermal growth followed by a metal-organic framework (MOF)-mediated sulfidation approach is employed to achieve burl-like Ni-Co-S nanomaterial-integrated hollow and porous NiMoO4 nanotubes onto rGO-coated Ni foam (rGO-NiMoO4@Ni-Co-S) as the electrode material for supercapacitors. The open framework of the rGO-Co-MOF template after the etching and sulfidation process not only enables the creation of a tubular structure of NiMoO4 nanorods but also provides convenient ion-electron pathways to promote rapid faradic reactions for the hybrid composite electrode. Owing to the unique hollow and tubular structure, the as-fabricated rGO-NiMoO4@Ni-Co-S electrode exhibits a high specific capacity of 318 mA h g-1 at 1 A g-1 and remarkable cyclic performance of 88.87% after 10,000 consecutive charge-discharge cycles in an aqueous 2 M KOH electrolyte on a three-electrode configuration. Moreover, the assembled rGO-NiMoO4@Ni-Co-S//rGO-MDC (MOF-derived carbon) asymmetric supercapacitor device exhibits a satisfactory energy density of 57.24 W h kg-1 at a power density of 801.8 W kg-1 with an admirable life span of 90.89% after 10,000 repeated cycles.
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Affiliation(s)
- Jiwan Acharya
- Carbon Composite Energy Nanomaterials Research Center, Woosuk University, Wanju, Chonbuk 55338, South Korea
| | - Gunendra Prasad Ojha
- Carbon Composite Energy Nanomaterials Research Center, Woosuk University, Wanju, Chonbuk 55338, South Korea
| | - Byoung-Suhk Kim
- Department of Organic Materials & Fiber Engineering, Jeonbuk National University, Jeonju 54896, South Korea
| | - Bishweshwar Pant
- Carbon Composite Energy Nanomaterials Research Center, Woosuk University, Wanju, Chonbuk 55338, South Korea
| | - Mira Park
- Carbon Composite Energy Nanomaterials Research Center, Woosuk University, Wanju, Chonbuk 55338, South Korea
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Abstract
Patients with cleidocranial dysplasia (CCD) caused by mutations in RUNX2 have severe dental anomalies, including delayed or absent eruption of permanent teeth. This requires painful and expensive surgical/orthodontic intervention because of the absence of medicine for this condition. Here, we demonstrate that nicotinamide, a vitamin B3 and class III histone deacetylase inhibitor, significantly improves delayed tooth eruption in Runx2+/- mice, a well-known CCD animal model, through the restoration of decreased osteoclastogenesis. We also found that Csf1 mRNA and protein levels were significantly reduced in Runx2+/- osteoblasts as compared with wild type whereas RANKL and OPG levels had no significant difference between wild type and Runx2+/- osteoblasts. The nicotinamide-induced restoration of osteoclastogenesis of bone marrow-derived macrophages in Runx2+/- mice was due to the increased expression of RUNX2 and CSF1 and increased RANKL/OPG ratio. RUNX2 directly regulated Csf1 mRNA expression via binding to the promoter region of the Csf1 gene. In addition, nicotinamide enhanced the RUNX2 protein level and transacting activity posttranslationally with Sirt2 inhibition. Taken together, our study shows the potential and underlying molecular mechanism of nicotinamide for the treatment of delayed tooth eruption by using the Runx2+/- murine model, suggesting nicotinamide as a candidate therapeutic drug for dental abnormalities in patients with CCD.
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Affiliation(s)
- H Yoon
- Department of Molecular Genetics and Pharmacology, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, Republic of Korea
| | - H J Kim
- Department of Molecular Genetics and Pharmacology, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, Republic of Korea
| | - H R Shin
- Department of Molecular Genetics and Pharmacology, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, Republic of Korea
| | - B S Kim
- Department of Molecular Genetics and Pharmacology, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, Republic of Korea
| | - W J Kim
- Department of Molecular Genetics and Pharmacology, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, Republic of Korea
| | - Y D Cho
- Department of Periodontology, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, Republic of Korea
| | - H M Ryoo
- Department of Molecular Genetics and Pharmacology, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, Republic of Korea
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17
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Hong ' MK, Choi WK, Park JH, Kuk YS, Kim BS, Seo MK. Relationship Between Functionalized Multi-Walled Carbon Nanotubes and Damping Properties of Multi-Walled Carbon Nanotubes/Carbon Fiber-Reinforced Plastic Composites for Shaft. J Nanosci Nanotechnol 2020; 20:6862-6870. [PMID: 32604528 DOI: 10.1166/jnn.2020.18810] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The mechanical properties and damping behavior of carbon fiber-reinforced plastic composites with functionalized multi-walled carbon nanotubes were examined. The functionalized multi-walled carbon nanotubes were blended with epoxy resins to prepare multi-walled carbon nanotubes/carbon fiber-reinforced plastic composites. The dispersion properties of functionalized multi-walled carbon nanotubes in epoxy resins were examined using surface free energy. The mechanical properties of functionalized multi-walled carbon nanotubes/carbon fiber-reinforced plastic composites were measured by interlaminar shear strength and torsion strength. The functionalized multi-walled carbon nanotubes/carbon fiber-reinforced plastic composites had superior mechanical properties due to the increase in dispersion properties of functionalized multi-walled carbon nanotubes in epoxy resins. However, the tan delta values of damping behavior, analyzed by dynamic mechanical analysis, varied with the type of functional groups of functionalized multi-walled carbon nanotubes. The composites obtained from functionalized multi-walled carbon nanotubes obtained through spermidine amidation reaction and carbon fiber-reinforced plastic showed excellent tan delta values due to the flexible segments in side chains.
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Affiliation(s)
- Mi-Kyoung Hong '
- Korea Institute of Carbon Convergence Technology, Jeonju 54853, South Korea
| | - Woong-Ki Choi
- Korea Institute of Carbon Convergence Technology, Jeonju 54853, South Korea
| | - Jong-Hyun Park
- Department of Carbon Materials and Fiber Engineering, Jeonbuk National University, Jeonju 54896, South Korea
| | - Yun-Su Kuk
- Korea Institute of Carbon Convergence Technology, Jeonju 54853, South Korea
| | - Byoung-Suhk Kim
- Department of Carbon Materials and Fiber Engineering, Jeonbuk National University, Jeonju 54896, South Korea
| | - Min-Kang Seo
- Korea Institute of Carbon Convergence Technology, Jeonju 54853, South Korea
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18
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Kim BS, Kang J, Jun S, Kim H, Pak K, Kim GH, Heo HJ, Kim YH. Association between immunotherapy biomarkers and glucose metabolism from F-18 FDG PET. Eur Rev Med Pharmacol Sci 2020; 24:8288-8295. [PMID: 32894535 DOI: 10.26355/eurrev_202008_22625] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE To assess associations between parameters derived from F-18 fluorodeoxyglucose (FDG) positron emission tomography (PET) and mRNA expression levels of immune checkpoint biomarkers such as programmed death receptor 1 (PD-1), programmed death-ligand 1 (PD-L1), cytotoxic T-lymphocyte antigen 4 (CTLA-4) as well as tumor mutation burden (TMB) in non-small cell lung cancer (NSCLC) patients. PATIENTS AND METHODS Integrated data were downloaded from Genomic Data Common Data Portal. Clinical, mRNA-seq, and whole exome-seq data of lung adenocarcinoma and squamous cell carcinoma from The Cancer Genome Atlas (TCGA) database were analyzed. TMB was defined as the total number of somatic missense mutations per megabase of the genome examined. Expression levels of PD-1, PD-L1, CTLA4 mRNA and TMB were collected. Correlations between imaging parameters of glucose metabolism and the expression levels of genomic biomarkers from cancers were evaluated. Bonferroni correction (adjusted p<0.0027) was applied to reduce type 1 error. RESULTS Of 31 NSCLC cases, 11 cases were adenocarcinoma (LUAD) and 20 were squamous cell carcinoma (LUSC). In linear regression analysis, texture parameters such as low gray-level run emphasis (LGRE, R2=0.48, p<0.0001), short run low gray-level emphasis (SRLGE, R2=0.45, p<0.0001) and long run low gray-level emphasis (LRLGE, R2=0.41, p=0.0001) derived from gray-level run length matrix (GLRLM) showed remarkable correlation with PD-L1 mRNA expression. Expression of PD-1, CTLA-4, and TMB failed to show any significant correlation with parameters of the F-18 FDG PET/CT. CONCLUSIONS Texture parameters derived from PET, known to indicate glucose uptake distribution, were correlated with expression of PD-L1 mRNA but not with expression of PD-1, CTLA-4 and TMB. Thus, tumoral heterogeneity could be a surrogate marker for the identification of PD-L1 level in NSCLC.
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Affiliation(s)
- B S Kim
- Department of Nuclear Medicine, Kosin University Gospel Hospital, University of Kosin College of Medicine, Busan, Republic of Korea.
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Lee Y, Kim S, Kim M, Kim BS, Jeong E, Shim H, Won CW. A later menopausal age is associated with a lower prevalence of physical frailty in community-dwelling older adults: The Korean Frailty and Aging Cohort Study (KFACS). Arch Gerontol Geriatr 2020; 91:104243. [PMID: 32916429 DOI: 10.1016/j.archger.2020.104243] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Revised: 08/04/2020] [Accepted: 08/24/2020] [Indexed: 11/28/2022]
Abstract
OBJECTIVES The aim of this study was to determine whether age at menopause is associated with physical frailty. METHODS This was a cross-sectional study that included 1264 women (70-84 years) from the Korean and Aging Cohort Study (KFACS) who had records of their ages at menarche and their ages at menopause and had experienced a natural menopause. We used Fried criteria to assess physical frailty status. The ages at menopause and menarche were collected using self-reported questionnaires. RESULTS The prevalence of physical frailty decreased by 5.3 % with each year of increase in age at menopause after adjusting for age, marital status, years of education, diabetes mellitus, hypertension, polypharmacy, hospitalizations, falls, and hormone replacement therapy (p = 0.005). The prevalence of frailty significantly decreased by 4.1 % when the reproductive span increased by a year (p = 0.019). CONCLUSIONS This study found that a later menopausal age was associated with a lower risk of frailty using Fried criteria. In addition, it showed that a longer reproductive span was associated with a lower prevalence of frailty.
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Affiliation(s)
- Y Lee
- Department of Family Medicine, Kyung Hee University Medical Center, Seoul, Republic of Korea
| | - S Kim
- Department of Family Medicine, Kyung Hee University Medical Center, Seoul, Republic of Korea
| | - M Kim
- Department of Biomedical Science and Technology, College of Medicine, East-West Medical Research Institute, Kyung Hee University, Seoul, Republic of Korea
| | - B S Kim
- Department of Family Medicine, Kyung Hee University Medical Center, Seoul, Republic of Korea
| | - E Jeong
- Department of Family Medicine, Kyung Hee University Medical Center, Seoul, Republic of Korea
| | - H Shim
- Department of Family Medicine, Kyung Hee University Medical Center, Seoul, Republic of Korea
| | - C W Won
- Elderly Frailty Research Center, Department of Family Medicine, College of Medicine, Kyung Hee University, Seoul, Republic of Korea.
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Yun JK, Chong BK, Kim HJ, Lee IS, Gong CS, Kim BS, Lee GD, Choi S, Kim HR, Kim DK, Park SI, Kim YH. Comparative outcomes of robot-assisted minimally invasive versus open esophagectomy in patients with esophageal squamous cell carcinoma: a propensity score-weighted analysis. Dis Esophagus 2020; 33:5610078. [PMID: 31665266 DOI: 10.1093/dote/doz071] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Revised: 06/16/2019] [Indexed: 02/06/2023]
Abstract
Robots are increasingly used in minimally invasive surgery. We evaluated the clinical benefits of robot-assisted minimally invasive esophagectomy (RAMIE) in comparison with the conventional open esophageal surgery. From 2012 to 2016, 371 patients with esophageal squamous cell carcinoma underwent an Ivor Lewis or McKeown procedure at our institution. Of these, 130 patients underwent laparoscopic gastric conduit formation followed by RAMIE, whereas 241 patients underwent conventional esophageal surgery, including laparotomy and open esophagectomy (OE). We compared the short- and long-term clinical outcomes of these patients using the propensity score-based inverse probability of treatment weighting technique (IPTW). Among the early outcomes, the OE group showed a higher incidence of pneumonia (P = 0.035) and a higher requirement for vasopressors (P = 0.001). Regarding the long-term outcomes, all-cause mortality was significantly higher (P = 0.001) and disease-free survival was lower (P = 0.006) in the OE group. Wound-related problems also occurred more frequently in the OE group (P = 0.020) during the long-term follow-up. There was no statistical intergroup difference in the recurrence rates (P = 0.191). The Cox proportional-hazard analysis demonstrated that wound problems (HR 0.16, 95% CI 0.02-0.57; P = 0.017), pneumonia (HR 0.23, 95% CI 0.06-0.68; P = 0.019), and use of vasopressors (HR 0.14, 95% CI 0.08-0.25; P = 0.001) were independent predictors of mortality. RAMIE could be a better surgical option for selected patients with esophageal squamous cell carcinoma.
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Affiliation(s)
- J K Yun
- Division of Thoracic Surgery, Department of Thoracic & Cardiovascular Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - B K Chong
- Division of Thoracic Surgery, Department of Thoracic & Cardiovascular Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - H J Kim
- Division of Thoracic Surgery, Department of Thoracic & Cardiovascular Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - I-S Lee
- Division of Stomach Surgery, Department of Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - C-S Gong
- Division of Stomach Surgery, Department of Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - B S Kim
- Division of Stomach Surgery, Department of Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - G D Lee
- Division of Thoracic Surgery, Department of Thoracic & Cardiovascular Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - S Choi
- Division of Thoracic Surgery, Department of Thoracic & Cardiovascular Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - H R Kim
- Division of Thoracic Surgery, Department of Thoracic & Cardiovascular Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - D K Kim
- Division of Thoracic Surgery, Department of Thoracic & Cardiovascular Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - S-I Park
- Division of Thoracic Surgery, Department of Thoracic & Cardiovascular Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Y-H Kim
- Division of Thoracic Surgery, Department of Thoracic & Cardiovascular Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
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21
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Gnana Sundara Raj B, Ko TH, Acharya J, Seo MK, Khil MS, Kim HY, Kim BS. A novel Fe2O3-decorated N-doped CNT porous composites derived from tubular polypyrrole with excellent rate capability and cycle stability as advanced supercapacitor anode materials. Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2020.135627] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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22
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Seo M, Won CW, Kim S, Yoo JH, Kim YH, Kim BS. The Association of Gait Speed and Frontal Lobe among Various Cognitive Domains: The Korean Frailty and Aging Cohort Study (KFACS). J Nutr Health Aging 2020; 24:91-97. [PMID: 31886814 DOI: 10.1007/s12603-019-1276-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
OBJECTIVE The aim of this study was to determine how gait speed and frontal lobe functionsin community-dwelling older adults in Korea. DESIGN This was a cross-sectional study. SETTING The study used data from the Korean Frailty and Aging Cohort Survey (KFACS), a multi-center longitudinal study addressing 10 centers across urban, rural, and suburban communities in Korea, between 2016 and 2017. PARTICIPANTS A total of 1552 older adults who underwent both gait speed tests and cognitive functions tests during the investigation of the KFACS. MEASUREMENTS Gait speed was assessed by asking participants to walk from a starting point to a point 4 meters away at a normal gait. Cognitive functions were evaluated using various standardized cognitive functions tests. RESULTS Gait speed was slower when participants were older or less educated The percentage of women, higher BMI, people with lower incomes, singles, smokers, and drinkers was high in the slower gait group. Also, all cognitive function scores were low and depression score was high in the group with slower walking speed. The slower walking speed showed low physical activity score and high prevalence of hypertension, osteoarthritis and osteoporosis. Among the seven cognitive functions (MMSE, memory, TMT, Recall, Recognition, digit span, and Fab), only TMT showed no significant difference between different gait speed groups. The other six cognitive functions showed higher results in the fastest gait speed group (T3), Participants in middle gait speed group (T2) also showed higher results in five of the seven cognitive function scores as well (Memory, Recall, Recognition, digit span, and Fab). CONCLUSION In this study, we found correlation between the slower gait speeds and the decrease in cognitive function, and especially the frontal lobe dysfunction was most prominent of all cognitive dysfunctions.
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Affiliation(s)
- M Seo
- B.S. Kim, Kyunghee hospital, Republic of Korea,+82-10-8232-8696, FAX: +82-2-958-8699,
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23
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Kim BJ, Kim JH, Kim BS, Kang JH. P4390Sex-specific association between secondhand smoke exposure and metabolic syndrome in 118,609 Korean never-smokers verified by both self-reported questionnaire and cotinine. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz745.0795] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
No study has reported the relationship between secondhand smoke (SHS) exposure and metabolic syndrome (MetS) in self-reported never-smokers verified by nicotine metabolite.
Purpose
The aim of this study is to determine the relationship between SHS exposure and MetS in self-reported and cotinine-verified never-smokers.
Methods
A total of 118,609 self-reported and cotinine-verified never-smokers (38,385 men; age 34.8±7.1 years) who participated in Kangbuk Samsung Health Study (KSHS) and Kangbuk Samsung Cohort study (KSCS) between 2011 and 2016 were included. Cotinine-verified never-smoker was defined as individuals having urinary cotinine <50 ng/mL. SHS exposure was defined as having experienced passive smoking indoors at home or the workplace.
Results
The prevalence of SHS exposure in the overall population was 22.6%, with rates of 27.4% for males and 20.3% for females (p<0.001). The overall prevalence of MetS was 6.8%; the prevalence in males was higher than that in females (10.7% versus 4.9%, p<0.001). In both males and females, the prevalence of MetS in group with SHS exposure was higher than that in group without SHS exposure (11.3% versus 10.4%, p=0.010 for males; 5.8% versus 4.6%, p<0.001 for females). However, there was significant gender interaction for the relationships between SHS exposure and MetS (p for interaction=0.010). A multivariate regression model was adjusted for the baseline variables including age, body mass index, frequency of alcohol drinking and vigorous exercise, blood urea nitrogen, creatinine, uric acid, total cholesterol, LDL cholesterol, and hsCRP. The results showed that SHS exposure only in females was associated with MetS (odds ratio [95% confidence interval], 1.17 [1.06, 1.29] for females; 1.02 [0.94, 1.11] for males). In particular, females with SHS exposure of ≥1 hours/day, ≥3 times/week, and ≥10 years increased the prevalence of MetS compared to those without SHS exposure (1.21 [1.02, 1.45], 1.30 [1.14, 1.49], and 1.12 [0.99, 1.28], respectively.
Conclusions
This study showed that the SHS exposure in females was significantly associated with MetS in self-reported never-smokers with low urinary cotinine levels (<50 ng/mL), suggesting that more active anti-smoking programs in the home and public are needed to reduce the risk of MetS.
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Affiliation(s)
- B J Kim
- Division.of Cardiology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea (Republic of)
| | - J H Kim
- Division.of Cardiology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea (Republic of)
| | - B S Kim
- Division.of Cardiology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea (Republic of)
| | - J H Kang
- Division.of Cardiology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea (Republic of)
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Kim BJ, Kim JH, Seo DC, Kim BS, Kang JH. 4947Association between secondhand smoke exposure and diabetes mellitus in 131,724 Korean never smokers using self-reported questionnaire and cotinine: gender differences. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz746.0017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
No study has reported the relationship between secondhand smoke (SHS) exposure and diabetes mellitus in self-reported never-smokers verified by nicotine metabolite.
Purpose
The aim of this study is to determine the relationship between SHS exposure and diabetes mellitus in self-reported and cotinine-verified never-smokers.
Methods
A total of 131,724 self-reported and cotinine-verified never-smokers (42,681 men; age 35.0±7.1 years) enrolled in Kangbuk Samsung Health Study (KSHS) and Kangbuk Samsung Cohort study (KSCS) between 2011 and 2016 were included. Cotinine-verified never-smoker was defined as individuals having urinary cotinine <50 ng/mL. SHS exposure was defined as having experienced passive smoking indoors at home or the workplace. Diabetes mellitus was defined as having a fasting blood glucose level of ≥7.0mmol/L, hemoglobin A1C ≥6.5% or taking anti-diabetic medication(s).
Results
The frequency of diabetes mellitus in the overall population was 1.6%; the frequency in males was higher than that in females (2.2% versus 1.3%, p<0.001). The overall frequency of SHS exposure was 22.9%, with rates of 27.6% for males and 20.7% for females (p<0.001). The frequency of diabetes mellitus in group with SHS exposure was higher than that in group without SHS exposure only in females (1.8% versus 1.2%, p<0.001 for females; 2.2% versus 2.2%, p=0.956 for males). There was significant gender interaction for the relationships between SHS exposure and diabetes mellitus (p for interaction <0.001). A multivariate regression model was adjusted for the baseline variables including age, waist circumference, body mass index, frequency of alcohol drinking and vigorous exercise, systolic blood pressure, blood urea nitrogen, creatinine, uric acid, total cholesterol, HDL cholesterol, LDL cholesterol, triglyceride, and hsCRP. Only in females, SHS exposure was significantly associated with diabetes mellitus (odds ratio [95% confidence interval], 1.40 [1.20, 1.65] for females; 1.00 [0.85, 1.19] for males). Higher frequency and longer duration of SHS exposure were also significantly associated with diabetes mellitus (p<0.001) for all trends). In particular, females with SHS exposure of ≥1 hours/day, ≥3 times/week, and ≥10 years increased the risk of diabetes mellitus 51–64% above that for those without SHS exposure (1.64 [1.25, 2.13], 1.51 [1.21, 1.87], and 1.59 [1.30, 1.95], respectively.
Conclusions
This study showed that the SHS exposure in females was significantly associated with diabetes mellitus in self-reported never-smokers verified by urinary cotinine and this association was proportional to the frequency and duration of SHS exposure. These findings suggest the importance of banning smoking in the home and public to reduce the risk of diabetes mellitus.
Acknowledgement/Funding
None
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Affiliation(s)
- B J Kim
- Division.of Cardiology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea (Republic of)
| | - J H Kim
- Division.of Cardiology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea (Republic of)
| | - D C Seo
- Division.of Cardiology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea (Republic of)
| | - B S Kim
- Division.of Cardiology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea (Republic of)
| | - J H Kang
- Division.of Cardiology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea (Republic of)
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Shin HR, Bae HS, Kim BS, Yoon HI, Cho YD, Kim WJ, Choi KY, Lee YS, Woo KM, Baek JH, Ryoo HM. PIN1 is a new therapeutic target of craniosynostosis. Hum Mol Genet 2019; 27:3827-3839. [PMID: 30007339 PMCID: PMC6216213 DOI: 10.1093/hmg/ddy252] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Accepted: 07/05/2018] [Indexed: 01/14/2023] Open
Abstract
Gain-of-function mutations in fibroblast growth factor receptors (FGFRs) cause congenital skeletal anomalies, including craniosynostosis (CS), which is characterized by the premature closure of craniofacial sutures. Apert syndrome (AS) is one of the severest forms of CS, and the only treatment is surgical expansion of prematurely fused sutures in infants. Previously, we demonstrated that the prolyl isomerase peptidyl-prolyl cis-trans isomerase interacting 1 (PIN1) plays a critical role in mediating FGFR signaling and that Pin1+/- mice exhibit delayed closure of cranial sutures. In this study, using both genetic and pharmacological approaches, we tested whether PIN1 modulation could be used as a therapeutic regimen against AS. In the genetic approach, we crossbred Fgfr2S252W/+, a mouse model of AS, and Pin1+/- mice. Downregulation of Pin1 gene dosage attenuated premature cranial suture closure and other phenotypes of AS in Fgfr2S252W/+ mutant mice. In the pharmacological approach, we intraperitoneally administered juglone, a PIN1 enzyme inhibitor, to pregnant Fgfr2S252W/+ mutant mice and found that this treatment successfully interrupted fetal development of AS phenotypes. Primary cultured osteoblasts from Fgfr2S252W/+ mutant mice expressed high levels of FGFR2 downstream target genes, but this phenotype was attenuated by PIN1 inhibition. Post-translational stabilization and activation of Runt-related transcription factor 2 (RUNX2) in Fgfr2S252W/+ osteoblasts were also attenuated by PIN1 inhibition. Based on these observations, we conclude that PIN1 enzyme activity is important for FGFR2-induced RUNX2 activation and craniofacial suture morphogenesis. Moreover, these findings highlight that juglone or other PIN1 inhibitors represent viable alternatives to surgical intervention for treatment of CS and other hyperostotic diseases.
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Affiliation(s)
- H R Shin
- BK21 Program, Department of Molecular Genetics and Dental Pharmacology and Therapeutics, School of Dentistry and Dental Research Institute, Seoul National University, Seoul, Republic of Korea
| | - H S Bae
- BK21 Program, Department of Molecular Genetics and Dental Pharmacology and Therapeutics, School of Dentistry and Dental Research Institute, Seoul National University, Seoul, Republic of Korea
| | - B S Kim
- BK21 Program, Department of Molecular Genetics and Dental Pharmacology and Therapeutics, School of Dentistry and Dental Research Institute, Seoul National University, Seoul, Republic of Korea
| | - H I Yoon
- BK21 Program, Department of Molecular Genetics and Dental Pharmacology and Therapeutics, School of Dentistry and Dental Research Institute, Seoul National University, Seoul, Republic of Korea
| | - Y D Cho
- BK21 Program, Department of Molecular Genetics and Dental Pharmacology and Therapeutics, School of Dentistry and Dental Research Institute, Seoul National University, Seoul, Republic of Korea.,Department of Periodontology, School of Dentistry, Seoul National University, Seoul, Republic of Korea
| | - W J Kim
- BK21 Program, Department of Molecular Genetics and Dental Pharmacology and Therapeutics, School of Dentistry and Dental Research Institute, Seoul National University, Seoul, Republic of Korea
| | - K Y Choi
- Department of Plastic and Reconstructive Surgery, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Y S Lee
- BK21 Program, Department of Molecular Genetics and Dental Pharmacology and Therapeutics, School of Dentistry and Dental Research Institute, Seoul National University, Seoul, Republic of Korea
| | - K M Woo
- BK21 Program, Department of Molecular Genetics and Dental Pharmacology and Therapeutics, School of Dentistry and Dental Research Institute, Seoul National University, Seoul, Republic of Korea
| | - J H Baek
- BK21 Program, Department of Molecular Genetics and Dental Pharmacology and Therapeutics, School of Dentistry and Dental Research Institute, Seoul National University, Seoul, Republic of Korea
| | - H M Ryoo
- BK21 Program, Department of Molecular Genetics and Dental Pharmacology and Therapeutics, School of Dentistry and Dental Research Institute, Seoul National University, Seoul, Republic of Korea
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26
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Yoo M, Kim S, Kim BS, Yoo J, Lee S, Jang HC, Cho BL, Son SJ, Lee JH, Park YS, Roh E, Kim HJ, Lee SG, Kim BJ, Kim MJ, Won CW. Moderate hearing loss is related with social frailty in a community-dwelling older adults: The Korean Frailty and Aging Cohort Study (KFACS). Arch Gerontol Geriatr 2019; 83:126-130. [PMID: 31003135 DOI: 10.1016/j.archger.2019.04.004] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2019] [Revised: 04/04/2019] [Accepted: 04/07/2019] [Indexed: 11/19/2022]
Abstract
OBJECTIVES To determine whether hearing loss is associated with social frailty in older adults. METHODS Cross-sectional analysis of cohort study data. Hearing was measured using of Pure-tone audiometry. Hearing loss was determined based on the average of hearing thresholds at 0.5, 1, and 2 kHz in the ear that had better hearing. Social frailty was defined based on the summation of the following 5 social components (1. Neighborhood meeting attendance 2. Talking to friend(s) sometimes 3.Someone gives you love and affection 4. Living alone 5. Meeting someone every day). Participants who had no correspondence to the components were considered non-social frailty; those with 1-2 components were considered social prefrailty; and those having 3 or more components were considered social frailty. RESULTS The prevalence of non-social frailty, social prefrailty, social frailty was 27.6%, 60.7% and 11.7% respectively. Of the five questions, two components (Neighborhood meeting attendance and Presence of someone who shows love and affection to the participants) were associated with hearing loss (p < 0.001). Compared to non-social frailty, the odds ratio of social frailty for hearing loss was 2.24 (95% CI 1.48-3.38) after adjusting for age, residential area, economic status, smoking, depressive disorder and MMSE, and 2.17 (95% CI 1.43-3.30) after further adjustments with physical frailty. CONCLUSION Hearing loss was associated with social frailty even after controlling confounding factors even including physical frailty.
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Affiliation(s)
- M Yoo
- Department of Family Medicine, Kyung Hee University Medical Center, kyungheedaero 23, dongdaemun-gu, 02447, Seoul, Republic of Korea
| | - S Kim
- Department of Family Medicine, Kyung Hee University Medical Center, kyungheedaero 23, dongdaemun-gu, 02447, Seoul, Republic of Korea
| | - B S Kim
- Department of Family Medicine, Kyung Hee University Medical Center, kyungheedaero 23, dongdaemun-gu, 02447, Seoul, Republic of Korea
| | - J Yoo
- Department of Family Medicine, Kyung Hee University Medical Center, kyungheedaero 23, dongdaemun-gu, 02447, Seoul, Republic of Korea
| | - S Lee
- Department of Family Medicine, Kyung Hee University Medical Center, kyungheedaero 23, dongdaemun-gu, 02447, Seoul, Republic of Korea
| | - H C Jang
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
| | - B L Cho
- Department of Family Medicine, Center for Health Promotion and Optimal Aging, Seoul National University College of Medicine & Hospital, Seoul, Republic of Korea
| | - S J Son
- Department of Psychiatry, Ajou University School of Medicine, Suwon, Republic of Korea
| | - J H Lee
- Catholic institute of U-healthcare, The Catholic University of Korea, Republic of Korea
| | - Y S Park
- Department of Family Medicine, Hallym University Chuncheon Sacred Heart Hospital, Chuncheon, Republic of Korea
| | - E Roh
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Korea University, Seoul, Republic of Korea
| | - H J Kim
- Department of Family Medicine, Jeju National University School of Medicine, Jeju, Republic of Korea
| | - S G Lee
- Department of Physical & Rehabilitation Medicine, Chonnam National University Medical School, Gwangju, Republic of Korea
| | - B J Kim
- Department of Psychiatry, College of Medicine, Gyeongsang National University, Jinju, Republic of Korea
| | - M J Kim
- East-West Medical Research Institute, Kyung Hee University, Seoul, Republic of Korea
| | - C W Won
- Department of Family Medicine, Kyung Hee University Medical Center, kyungheedaero 23, dongdaemun-gu, 02447, Seoul, Republic of Korea; Elderly Frailty Research Center, Department of Family Medicine, Kyung Hee University College of Medicine, kyungheedaero 23, dongdaemun-gu, 02447, Seoul, Republic of Korea.
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27
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Kim BS, Kyung WS, Denlinger JD, Kim C, Park SR. Strong One-Dimensional Characteristics of Hole-Carriers in ReS 2 and ReSe 2. Sci Rep 2019; 9:2730. [PMID: 30804468 PMCID: PMC6389895 DOI: 10.1038/s41598-019-39540-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Accepted: 12/31/2018] [Indexed: 11/11/2022] Open
Abstract
Each plane of layered ReS2 and ReSe2 materials has 1D chain structure, from which intriguing properties such as 1D character of the exciton states and linearly polarized photoluminescence originate. However, systematic studies on the 1D character of charge carriers have not been done yet. Here, we report on systematic and comparative studies on the energy-momentum dispersion relationships of layered transition metal dichalcogenides ReS2 and ReSe2 by angle resolved photoemission. We found that the valence band maximum or the minimum energy for holes is located at the high symmetric Z-point for both materials. However, the out-of-plane (\documentclass[12pt]{minimal}
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\begin{document}$${k}_{z}$$\end{document}kz) dispersion for ReSe2 (20 meV) is found to be much smaller than that of ReS2 (150 meV). We observe that the effective mass of the hole carriers along the direction perpendicular to the chain is about 4 times larger than that along the chain direction for both ReS2 and ReSe2. Remarkably, the experimentally measured hole effective mass is about twice heavier than that from first principles calculation for ReS2 although the in-plane anisotropy values from the experiment and calculations are comparable. These observation indicate that bulk ReS2 and ReSe2 are unique semiconducting transition metal dichalcogenides having strong one-dimensional characters.
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Affiliation(s)
- B S Kim
- Department of Physics and Astronomy, Seoul National University, Seoul, 08826, Korea.,Center for Correlated Electron Systems, Institute for Basic Science, Seoul, 08826, Korea.,Department of Physics, Incheon National University, Incheon, 22012, Korea
| | - W S Kyung
- Department of Physics and Astronomy, Seoul National University, Seoul, 08826, Korea.,Center for Correlated Electron Systems, Institute for Basic Science, Seoul, 08826, Korea.,Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - J D Denlinger
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - C Kim
- Department of Physics and Astronomy, Seoul National University, Seoul, 08826, Korea. .,Center for Correlated Electron Systems, Institute for Basic Science, Seoul, 08826, Korea.
| | - S R Park
- Department of Physics, Incheon National University, Incheon, 22012, Korea.
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Kang I, Kim S, Kim BS, Yoo J, Kim M, Won CW. Sleep Latency in Men and Sleep Duration in Women Can Be Frailty Markers in Community-Dwelling Older Adults: The Korean Frailty and Aging Cohort Study (KFACS). J Nutr Health Aging 2019; 23:63-67. [PMID: 30569070 DOI: 10.1007/s12603-018-1109-2] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVES To test whether sleep disturbances are associated with frailty in older men and women. DESIGN Cross-sectional analysis of cohort study data. The participants were 1168 community-dwelling older adults aged 70 to 84 years who took part in the Korean Frailty and Aging Cohort Study and completed both self-reported sleep parameters and assessment of frailty. Univariate and multivariate survey logistic regression models were used to calculate odds ratios (OR) with 95% confidence intervals (CI) for frailty. Frailty was defined using the Fried's criteria. RESULTS Frailty was associated with sleep latency in men. The odds ratio for this association was 3.39 (95% CI 1.31-8.76) after adjusting for age, body mass index (BMI), physical activity, and select comorbidities, and 2.16 (95% CI 0.75-6.23) after further adjusting for depression. Frailty was associated with long sleep duration of more than 8 hours a night in women. The odds ratio for this association was 3.95 (95% CI, 1.27-12.33) after adjusting for age, BMI, physical activity, select comorbidities, and the number of medications. CONCLUSION Prolonged sleep latency (≥60 minutes) in men and long sleep duration (>8hr per night) in women were each independently associated with higher odds of frailty. Long sleep latency in elderly men and long sleep duration in elderly women may suggest they have a high chance of frailty.
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Affiliation(s)
- I Kang
- Chang Won Won, MD. Ph.D, Elderly Frailty Research Center, Department of Family Medicine, Kyung Hee University College of Medicine, Kyungheedaero 23, Dongdaemun-gu, Seoul, 02447 Republic of Korea.Tel: +82 2 958 8700; E-mail:
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Yoo J, Lee JS, Kim S, Kim BS, Choi H, Song DY, Kim WB, Won CW. Length of hospital stay after hip fracture surgery and 1-year mortality. Osteoporos Int 2019; 30:145-153. [PMID: 30361752 DOI: 10.1007/s00198-018-4747-7] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Accepted: 10/18/2018] [Indexed: 11/30/2022]
Abstract
UNLABELLED There is ongoing effort to discharge patients early after hip fracture surgery to reduce the medical and economic burden. We tried to find whether there is any related side effect, and discovered that early discharge, especially before 10 days after surgery, is associated with higher mortality. INTRODUCTION The aim of this study was to analyze the association between the length of hospital stay after hip fracture and 1-year mortality in older adults aged ≥ 65 years old. METHODS We conducted a retrospective cohort study using the Korean National Health Insurance Service data to identify patients who were discharged after hip fracture surgery from 2007 to 2009 among 487,460 older adults of age ≥ 65 years. The lengths of stay involving hip fracture surgery were categorized at 10-day interval, and analyzed in relation to 1-year mortality from the date of hospital discharge. RESULTS A total of 4213 patients were discharged after hip fracture surgery, of whom 604 (14.3%) died within 1 year of discharge. The average length of stay was 30.7 days (standard deviation 24.5 days). The 1-year mortality was the highest for the length of stay ≤ 10 days group at 21.7%, followed by 15.2%, 14.3%, 13.3%, and 12.4% for > 40, 21-30, 31-40, and 11-20 days groups, respectively (p value 0.05). On Cox proportional hazard regression, the adjusted hazard ratio for length of stay ≤ 10 days group was 1.56 (95% confidence interval 1.14-2.12) against the reference group (11-20 days), while other groups did not show statistical significance. Higher risk of death was associated with increasing age, male gender, Charlson comorbidity index ≥3, subtrochanteric fracture, and discharge to tertiary care hospitals and long-term care hospitals. CONCLUSION Older adults discharged within 10 days of hospital admission for hip fracture surgery have higher 1-year mortality after discharge.
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Affiliation(s)
- J Yoo
- Department of Family Medicine, College of Medicine, Kyung Hee University, 23 Kyungheedae-ro, Dongdaemun-gu, Seoul, South Korea
| | - J S Lee
- Clinical Research Center, Asan Medical Center, 88, 43-gil Olympic-ro, Songpa-gu, Seoul, South Korea
| | - S Kim
- Department of Family Medicine, College of Medicine, Kyung Hee University, 23 Kyungheedae-ro, Dongdaemun-gu, Seoul, South Korea
| | - B S Kim
- Department of Family Medicine, College of Medicine, Kyung Hee University, 23 Kyungheedae-ro, Dongdaemun-gu, Seoul, South Korea
| | - H Choi
- Department of Family Medicine, College of Medicine, Kyung Hee University, 23 Kyungheedae-ro, Dongdaemun-gu, Seoul, South Korea
| | - D Y Song
- Elderly Frailty Research Center, Kyung Hee University, 23 Kyungheedae-ro, Dongdaemun-gu, Seoul, South Korea
| | - W B Kim
- Department of Medicine, Graduate School, Kyung Hee University, 23 Kyungheedae-ro, Dongdaemun-gu, Seoul, South Korea
| | - C W Won
- Department of Family Medicine, College of Medicine, Kyung Hee University, 23 Kyungheedae-ro, Dongdaemun-gu, Seoul, South Korea.
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Kim K, Seo J, Lee E, Ko KT, Kim BS, Jang BG, Ok JM, Lee J, Jo YJ, Kang W, Shim JH, Kim C, Yeom HW, Il Min B, Yang BJ, Kim JS. Large anomalous Hall current induced by topological nodal lines in a ferromagnetic van der Waals semimetal. Nat Mater 2018; 17:794-799. [PMID: 30013056 DOI: 10.1038/s41563-018-0132-3] [Citation(s) in RCA: 102] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2017] [Accepted: 06/13/2018] [Indexed: 06/08/2023]
Abstract
Topological semimetals host electronic structures with several band-contact points or lines and are generally expected to exhibit strong topological responses. Up to now, most work has been limited to non-magnetic materials and the interplay between topology and magnetism in this class of quantum materials has been largely unexplored. Here we utilize theoretical calculations, magnetotransport and angle-resolved photoemission spectroscopy to propose Fe3GeTe2, a van der Waals material, as a candidate ferromagnetic (FM) nodal line semimetal. We find that the spin degree of freedom is fully quenched by the large FM polarization, but the line degeneracy is protected by crystalline symmetries that connect two orbitals in adjacent layers. This orbital-driven nodal line is tunable by spin orientation due to spin-orbit coupling and produces a large Berry curvature, which leads to a large anomalous Hall current, angle and factor. These results demonstrate that FM topological semimetals hold significant potential for spin- and orbital-dependent electronic functionalities.
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Affiliation(s)
- Kyoo Kim
- Department of Physics, Pohang University of Science and Technology, Pohang, Republic of Korea
- Max Planck POSTECH/Hsinchu Center for Complex Phase Materials, Pohang University of Science and Technology, Pohang, Republic of Korea
| | - Junho Seo
- Department of Physics, Pohang University of Science and Technology, Pohang, Republic of Korea
- Center for Artificial Low Dimensional Electronic Systems, Institute for Basic Science (IBS), Pohang, Republic of Korea
| | - Eunwoo Lee
- Department of Physics and Astronomy, Seoul National University, Seoul, Republic of Korea
- Center for Correlated Electron Systems, Institute for Basic Science (IBS), Seoul, Republic of Korea
- Center for Theoretical Physics (CTP), Seoul National University, Seoul, Republic of Korea
| | - K-T Ko
- Department of Physics, Pohang University of Science and Technology, Pohang, Republic of Korea
- Max Planck POSTECH/Hsinchu Center for Complex Phase Materials, Pohang University of Science and Technology, Pohang, Republic of Korea
| | - B S Kim
- Department of Physics and Astronomy, Seoul National University, Seoul, Republic of Korea
- Center for Correlated Electron Systems, Institute for Basic Science (IBS), Seoul, Republic of Korea
| | - Bo Gyu Jang
- Department of Chemistry, Pohang University of Science and Technology, Pohang, Republic of Korea
| | - Jong Mok Ok
- Department of Physics, Pohang University of Science and Technology, Pohang, Republic of Korea
- Center for Artificial Low Dimensional Electronic Systems, Institute for Basic Science (IBS), Pohang, Republic of Korea
| | - Jinwon Lee
- Department of Physics, Pohang University of Science and Technology, Pohang, Republic of Korea
- Center for Artificial Low Dimensional Electronic Systems, Institute for Basic Science (IBS), Pohang, Republic of Korea
| | - Youn Jung Jo
- Department of Physics, Kyungpook National University, Daegu, Republic of Korea
| | - Woun Kang
- Department of Physics, Ewha Womans University, Seoul, Republic of Korea
| | - Ji Hoon Shim
- Department of Chemistry, Pohang University of Science and Technology, Pohang, Republic of Korea
| | - C Kim
- Department of Physics and Astronomy, Seoul National University, Seoul, Republic of Korea
- Center for Correlated Electron Systems, Institute for Basic Science (IBS), Seoul, Republic of Korea
| | - Han Woong Yeom
- Department of Physics, Pohang University of Science and Technology, Pohang, Republic of Korea
- Center for Artificial Low Dimensional Electronic Systems, Institute for Basic Science (IBS), Pohang, Republic of Korea
| | - Byung Il Min
- Department of Physics, Pohang University of Science and Technology, Pohang, Republic of Korea
| | - Bohm-Jung Yang
- Department of Physics and Astronomy, Seoul National University, Seoul, Republic of Korea.
- Center for Correlated Electron Systems, Institute for Basic Science (IBS), Seoul, Republic of Korea.
- Center for Theoretical Physics (CTP), Seoul National University, Seoul, Republic of Korea.
| | - Jun Sung Kim
- Department of Physics, Pohang University of Science and Technology, Pohang, Republic of Korea.
- Center for Artificial Low Dimensional Electronic Systems, Institute for Basic Science (IBS), Pohang, Republic of Korea.
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Kim BS, Kim TH, Kwon CH, Kim SH, Kim HJ, Hwang HK, Chung SM. P6250Association between preoperative high sensitive troponin I levels and cardiovascular events after non cardiac surgery in the elderly. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy566.p6250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- B S Kim
- Konkuk University Hospital, Division of Cardiology, Department of Medicine, Seoul, Korea Republic of
| | - T H Kim
- Konkuk University Hospital, Department of Orthopedic surgery, Seoul, Korea Republic of
| | - C H Kwon
- Konkuk University Hospital, Division of Cardiology, Department of Medicine, Seoul, Korea Republic of
| | - S H Kim
- Konkuk University Hospital, Division of Cardiology, Department of Medicine, Seoul, Korea Republic of
| | - H J Kim
- Konkuk University Hospital, Division of Cardiology, Department of Medicine, Seoul, Korea Republic of
| | - H K Hwang
- Konkuk University Hospital, Division of Cardiology, Department of Medicine, Seoul, Korea Republic of
| | - S M Chung
- Konkuk University Hospital, Division of Cardiology, Department of Medicine, Seoul, Korea Republic of
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Kim BJ, Seo DC, Kim BS, Kang JH. P2509Association between cigarette smoking and incidence of diabetes mellitus using two different smoking stratifications in 78,212 Korean individuals: self-reported questionnaire and urine cotinine level. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy565.p2509] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- B J Kim
- Division.of Cardiology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea Republic of
| | - D C Seo
- Division.of Cardiology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea Republic of
| | - B S Kim
- Division.of Cardiology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea Republic of
| | - J H Kang
- Division.of Cardiology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea Republic of
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Park JK, Choi YW, Kim BS, Chang KS, Lee YG, Shin JH, Lim YH, Park HC, Shin J. P1880Independent effect of physical activity and resting heart rate on incidence of atrial fibrillation in general population. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy565.p1880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- J K Park
- Hanyang University, Seoul, Korea Republic of
| | - Y W Choi
- Hanyang University, Seoul, Korea Republic of
| | - B S Kim
- Hanyang University, Seoul, Korea Republic of
| | - K S Chang
- Hanyang University, Seoul, Korea Republic of
| | - Y G Lee
- Hanyang University Kuri Hospital, Cardiology, Guri, Korea Republic of
| | - J H Shin
- Hanyang University Kuri Hospital, Cardiology, Guri, Korea Republic of
| | - Y H Lim
- Hanyang University, Seoul, Korea Republic of
| | - H C Park
- Hanyang University Kuri Hospital, Cardiology, Guri, Korea Republic of
| | - J Shin
- Hanyang University, Seoul, Korea Republic of
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Kim IC, Kim TH, Lee SH, Kim BS. Extremely Foldable and Highly Transparent Nanofiber-Based Electrodes for Liquid Crystal Smart Devices. Sci Rep 2018; 8:11517. [PMID: 30069032 PMCID: PMC6070569 DOI: 10.1038/s41598-018-29940-3] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Accepted: 07/20/2018] [Indexed: 11/09/2022] Open
Abstract
The nylon 6 nanofiber-reinforced cellulose acetate (NF-r-CA) film as a fiber-based transparent substrate is used to develop the highly transparent electrodes with excellent durable and extremely foldable properties. Mechanical properties of the NF-r-CA films are greatly improved, suggesting that the nanofibers provide an effective reinforcement. The NF-r-CA transparent films show smooth surface morphologies (RRMS ~ 27 nm) than as-spun nylon 6 nanofiber membrane, indicating the successful infiltration of cellulose acetate into the voids of nylon nanofiber membranes. The NF45-r-CA electrodes prepared using AgNWs concentration of 0.025 wt% and electrospinning time of 45 min are highly transparent (~90%), lower sheet resistance (~24 Ω sq-1) and mechanically robust (59.7 MPa). The sheet resistance of NF45-r-CA electrodes remains almost constant, and the change ratio is less than 0.01% even after a repeated bending test of 10,000 cycles (bending radius ~1 mm), whereas ITO electrode shows gradual increase in sheet resistance and then eventually no electrical signal at about 270 cycles. We also demonstrate the successful fabrication of the foldable polymer-disperse liquid crystal film utilizing highly transparent NF45-r-CA electrode, which shows outstanding working stability after bending test of 500 cycles at an extreme bending radius of 1.5 mm.
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Affiliation(s)
- In Chul Kim
- Department of Organic Materials & Fiber Engineering, Chonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do, 54896, Republic of Korea
| | - Tae-Hyung Kim
- Graduate School of Flexible & Printable Electronics Engineering, Chonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do, 54896, Republic of Korea
| | - Seung Hee Lee
- Department of Polymer-Nano Science and Technology, Chonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do, 54896, Republic of Korea. .,Department of BIN Convergence Technology, Chonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do, 54896, Republic of Korea.
| | - Byoung-Suhk Kim
- Department of Organic Materials & Fiber Engineering, Chonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do, 54896, Republic of Korea. .,Department of BIN Convergence Technology, Chonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do, 54896, Republic of Korea.
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Gnana Sundara Raj B, Kim HY, Kim BS. Ultrasound assisted formation of Mn2SnO4 nanocube as electrodes for high performance symmetrical hybrid supercapacitors. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2018.05.021] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Abstract
The aim of the present study was to investigate the potential of a fast gas chromatography (GC) e-nose for freshness discrimination and for prediction of storage time as well as sensory and internal quality changes during storage of hen eggs. All samples were obtained from the same egg production farm and stored at 20 °C for 20 d. Egg sampling was conducted every 0, 3, 6, 9, 12, 16, and 20 d. During each sampling time, 4 egg cartons (each containing 10 eggs) were randomly selected: one carton for Haugh units, one carton for sensory evaluation and 2 cartons for the e-nose experiment. The e-nose study included 2 independent test sets; calibration (35 samples) and validation (28 samples). Every sampling time, 5 replicates were prepared from one egg carton for calibration samples and 4 replicates were prepared from the remaining egg carton for validation samples. Sensors (peaks) were selected prior to multivariate chemometric analysis; qualitative sensors for principal component analysis (PCA) and discriminant factor analysis (DFA) and quantitative sensors for partial least square (PLS) modeling. PCA and DFA confirmed the difference in volatile profiles of egg samples from 7 different storage times accounting for a total variance of 95.7% and 93.71%, respectively. Models for predicting storage time, Haugh units, odor score, and overall acceptability score from e-nose data were developed using calibration samples by PLS regression. The results showed that these quality indices were well predicted from the e- nose signals, with correlation coefficients of R2 = 0.9441, R2 = 0.9511, R2 = 0.9725, and R2 = 0.9530 and with training errors of 0.887, 1.24, 0.626, and 0.629, respectively. As a result of ANOVA, most of the PLS model results were not significantly (P > 0.05) different from the corresponding reference values. These results proved that the fast GC electronic nose has the potential to assess egg freshness and feasibility to predict multiple egg freshness indices during its circulation in the supply chain.
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Affiliation(s)
- Samuel M Yimenu
- Department of Food Biotechnology, University of Science and Technology (UST), Gajeong-ro, Yuseong-gu, Daejeon, 305-350, Republic of Korea.,Department of Food Science and Postharvest Technology, College of Agriculture and Environmental Sciences, Arsi University, P.O. Box 193 Asella, Ethiopia
| | - J Y Kim
- Smart Food Distribution Research Group, Korea Food Research Institute, 1201-62, Anyangpangyo-ro, Bundang-gu, Seongnam-si, Gyeonggi-do, Republic of Korea
| | - B S Kim
- Department of Food Biotechnology, University of Science and Technology (UST), Gajeong-ro, Yuseong-gu, Daejeon, 305-350, Republic of Korea.,Smart Food Distribution Research Group, Korea Food Research Institute, 1201-62, Anyangpangyo-ro, Bundang-gu, Seongnam-si, Gyeonggi-do, Republic of Korea
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Yimenu SM, Kim JY, Koo J, Kim BS. Predictive modeling for monitoring egg freshness during variable temperature storage conditions. Poult Sci 2018; 96:2811-2819. [PMID: 28340058 DOI: 10.3382/ps/pex038] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2016] [Accepted: 01/18/2017] [Indexed: 11/20/2022] Open
Abstract
The overall aim of this research was to develop egg freshness prediction models in terms of selected quality indices. Six experiments (4 constant temperatures and 2 variable temperatures) were carried out on hen eggs for a total period of 10, 21, 26, 13, and 105 d at storage temperatures of 30, 20, 20 to 10, 30 to 10, and 5 and 10°C, to observe trends in the relative weight loss (RWL), Haugh unit (HU), yolk index (YI), albumin index (AI), yolk pH, and albumin pH. The results showed that there was an increasing trend in the RWL and a decreasing trend in the YI, AI, and HU for all temperature conditions. The changes in the yolk and albumin pH were not uniform. The data from the constant temperature conditions were used to determine the coefficients of the egg quality prediction models, which consisted of the primary model controlling the change rate of the quality indicator at a temperature condition in differential equation form, and the secondary model controlling the change rate with temperature, which was in quadratic polynomial form. The models were applied to the data from the fluctuating temperature conditions, and the zeroth, third, and eighth order kinetic models described the stepwise change in the RWL, HU, and YI, respectively. The accuracy and bias factor values for the RWL, HU, and YI were 1.116 and 0.940, 1.028 and 1.001, and 1.038 and 0.966, respectively. It can be concluded that the models can be used to predict egg freshness in terms of the RWL, HU, and YI at any temperature condition with in the range of 5 to 30°C during storage.
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Affiliation(s)
- S M Yimenu
- Department of Food Biotechnology, University of Science and Technology (UST), Gajeong-ro, Yuseong-gu, Daejeon, 305-350, Republic of Korea.,Department of Food Science and Postharvest Technology, College of Agriculture and Environmental Sciences, Arsi University, P.O. Box 193 Asella, Ethiopia
| | - J Y Kim
- Smart Food Distribution Research Group, Korea Food Research Institute, 1201-62, Anyangpangyo-ro, Bundang-gu, Seongnam-si, Gyeonggi-do, Republic of Korea.,Department of Mechanical Engineering, Kyung Hee University, Yongin-si, Gyeonggi-do, Republic of Korea
| | - J Koo
- Department of Mechanical Engineering, Kyung Hee University, Yongin-si, Gyeonggi-do, Republic of Korea
| | - B S Kim
- Department of Food Biotechnology, University of Science and Technology (UST), Gajeong-ro, Yuseong-gu, Daejeon, 305-350, Republic of Korea.,Smart Food Distribution Research Group, Korea Food Research Institute, 1201-62, Anyangpangyo-ro, Bundang-gu, Seongnam-si, Gyeonggi-do, Republic of Korea
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Youn SW, Lee JH, Yu DY, Kim Y, Kim BS, Seo SJ, Choe YB, Yun SK, Park J, Kim NI, Choi CW, Youn JI, Lee SJ, Lee MG, Kim KJ, Park CJ, Ro YS, Song HJ, Shin BS, Ahn SK, Lee JY, Won YH, Jang MS, Kim KH, Kim MH, Kim TY, Choi JH. The relationship between clinical characteristics including presence of exposed lesions and health-related quality of life (HRQoL) in patients with psoriasis: analysis from the nationwide epidemiologic study for psoriasis in Korea (EPI-PSODE study). J Eur Acad Dermatol Venereol 2018; 32:1499-1506. [PMID: 29430733 DOI: 10.1111/jdv.14865] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2017] [Accepted: 01/25/2018] [Indexed: 01/23/2023]
Abstract
BACKGROUND Psychological aspect and quality of life should be considered in treating patients with psoriasis. OBJECTIVE We sought to ascertain which clinical characteristics including presence of exposed lesions are associated with impairment of health-related quality of life (HRQoL) in patients with psoriasis. METHODS The EPI-PSODE study was a nationwide, multicenter, cross-sectional study conducted in Korea that included 1260 adult patients with psoriasis. In addition to clinical characteristics including presence of exposed lesions, data were collected using the Psoriatic Arthritis (PsA) Screening and Evaluation (PASE), Dermatology Life Quality Index (DLQI), MOS 36-Item Short-Form Health Survey (SF-36), Work Productivity and Activity Impairment Questionnaire Psoriasis (WPAI: PSO) and Medication Satisfaction Questionnaire (MSQ). RESULTS Patients with a DLQI score > 5 (n = 990) were younger, had an earlier onset of psoriasis, scored higher on the Psoriasis Area and Severity Index (PASI), had higher body surface area (BSA) and had higher PASE scores than patients with DLQI ≤ 5 (n = 266). The group of patients with exposed lesions (n = 871) were younger and male predominance, earlier onset of psoriasis, longer disease duration, higher PASI/BSA score and a higher proportion with drinking and smoking history each than the group of patients without exposed lesions (n = 389). Presence of exposed lesions negatively influenced DLQI, 36-Item Short-Form Health Survey (SF-36) (mental component), presenteeism, total work productivity impairment and total activity impairment in the WPAI: PSO. In multiple regression model, PASI score was the only variable which was significantly associated with all HRQoL measures. Presence of exposed lesions was a significant factor affecting DLQI and SF-36 (mental). CONCLUSION The presence of exposed lesions has a negative impact on quality of life, mental health and work productivity. Therefore, effective treatments are particularly needed for psoriasis patients with exposed lesions.
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Affiliation(s)
- S W Youn
- Department of Dermatology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea
| | - J-H Lee
- Department of Dermatology, Sungkyunkwan University School of Medicine, Samsung Medical Center, Seoul, Korea
| | - D Y Yu
- Medical Affairs, Janssen Korea, Seoul, Korea
| | - Y Kim
- Medical Affairs, Janssen Korea, Seoul, Korea
| | - B S Kim
- Department of Dermatology, Pusan National University School of Medicine, Busan, Korea
| | - S J Seo
- Department of Dermatology, Chung-Ang University Hospital, Seoul, Korea
| | - Y B Choe
- Department of Dermatology, Konkuk University School of Medicine, Seoul, Korea
| | - S-K Yun
- Department of Dermatology, Chonbuk National University Medical School, Jeonju, Korea
| | - J Park
- Department of Dermatology, Catholic University of Daegu School of Medicine, Daegu, Korea
| | - N I Kim
- Department of Dermatology, KyungHee University Medical center, Seoul, Korea
| | - C W Choi
- Department of Dermatology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea
| | - J I Youn
- Department of Dermatology, National Medical Center, Seoul, Korea
| | - S-J Lee
- Department of Dermatology, Kyungpook National University Hospital, Daegu, Korea
| | - M-G Lee
- Department of Dermatology, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - K J Kim
- Department of Dermatology, Hallym University Sacred Heart Hospital, Anyang, Korea
| | - C J Park
- Department of Dermatology, The Catholic University of Korea, Bucheon St. Mary's Hospital, Bucheon, Korea
| | - Y S Ro
- Department of Dermatology, Hanyang University Medical Center, Seoul, Korea
| | - H J Song
- Department of Dermatology, Korea University Guro Hospital, Seoul, Korea
| | - B S Shin
- Department of Dermatology, Chosun University Hospital, Gwangju, Korea
| | - S K Ahn
- Department of Dermatology, Wonju Severance Christian Hospital, Wonju, Korea
| | - J Y Lee
- Department of Dermatology, Chungbuk National University College of Medicine, Cheongju, Korea
| | - Y H Won
- Department of Dermatology, Chonnam National University Hospital, Gwangju, Korea
| | - M S Jang
- Department of Dermatology, Kosin University College of Medicine, Busan, Korea
| | - K H Kim
- Department of Dermatology, Dong-A University Hospital, Busan, Korea
| | - M H Kim
- Department of Dermatology, Dankook University Hospital, Cheonan, Korea
| | - T Y Kim
- Department of Dermatology, Catholic University of Korea Seoul St. Mary's Hospital, Seoul, Korea
| | - J-H Choi
- Department of Dermatology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea
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Kim WJ, Ko TH, Seo MK, Chung YS, Kim HY, Kim BS. Engineered carbon fiber papers as flexible binder-free electrodes for high-performance capacitive energy storage. J IND ENG CHEM 2018. [DOI: 10.1016/j.jiec.2017.10.033] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Ico G, Myung A, Kim BS, Myung NV, Nam J. Transformative piezoelectric enhancement of P(VDF-TrFE) synergistically driven by nanoscale dimensional reduction and thermal treatment. Nanoscale 2018; 10:2894-2901. [PMID: 29368772 DOI: 10.1039/c7nr08296g] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Despite the significant potential of organic piezoelectric materials in the electro-mechanical or mechano-electrical applications that require light and flexible material properties, the intrinsically low piezoelectric performance as compared to traditional inorganic materials has limited their full utilization. In this study, we demonstrate that dimensional reduction of poly(vinylidene fluoride trifluoroethylene) (P(VDF-TrFE)) at the nanoscale by electrospinning, combined with an appropriate thermal treatment, induces a transformative enhancement in piezoelectric performance. Specifically, the piezoelectric coefficient (d33) reached up to -108 pm V-1, approaching that of inorganic counterparts. Electrospun mats composed of thermo-treated 30 nm nanofibers with a thickness of 15 μm produced a consistent peak-to-peak voltage of 38.5 V and a power output of 74.1 μW at a strain of 0.26% while sustaining energy production over 10k repeated actuations. The exceptional piezoelectric performance was realized by the enhancement of piezoelectric dipole alignment and the materialization of flexoelectricity, both from the synergistic effects of dimensional reduction and thermal treatment. Our findings suggest that dimensionally controlled and thermally treated electrospun P(VDF-TrFE) nanofibers provide an opportunity to exploit their flexibility and durability for mechanically challenging applications while matching the piezoelectric performance of brittle, inorganic piezoelectric materials.
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Affiliation(s)
- G Ico
- Department of Bioengineering, University of California, Riverside, Riverside, CA 92521, USA.
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Kim S, Won CW, Kim BS, Kim S, Yoo J, Byun S, Jang HC, Cho BL, Son SJ, Lee JH, Park YS, Choi KM, Kim HJ, Lee SG. EuroQol Visual Analogue Scale (EQ-VAS) as a Predicting Tool for Frailty in Older Korean Adults: The Korean Frailty an Aging Cohort Study (KFACS). J Nutr Health Aging 2018; 22:1275-1280. [PMID: 30498837 DOI: 10.1007/s12603-018-1077-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
OBJECTIVES This study was conducted to determine the cutoff value and efficacy of the EuroQol Visual Analogue Scale (EQ-VAS) for predicting frailty. DESIGN The EQ-VAS medians (Interquartile Range) were compared and analyzed against the FFI. PARTICIPANTS The subjects were 1471 older adults aged 70 to 84 years who had completed both EQ-VAS and Fried Frailty index (FFI) in the first baseline year (2016) of the Korean Frailty and Aging Cohort Study. RESULTS Of the 1471 subjects,600 were classified as robust, 716 as pre-frail, and 155 as frail. The median EQ-VAS scores were 80.00 (20.00) for robust, 75.00 (25.00) for pre-frail, and 60.00 (25.00) for frail subjects.The medians of all five components of the FFI, weight loss (70.00 vs. 80.00), grip strength (70.00 vs. 80.00), exhaustion (70.00 vs. 80.00), walking velocity (70.00 vs. 80.00), and physical activity (70.00 vs. 80.00), were lower in the abnormal groups. We tested the efficacy of EQ-VAS as a diagnostic tool to predict frailty, and the area under the curve of EQ-VAS was 0.71 withthe optimal cut-off value of 72. CONCLUSION EQ-VAS presented negative correlation with FFI, and the optimal cut off value for frailty was 72. These results suggest that EQ-VAS is a valuable tool for assessing frailty andmay be a good predictor of frailty in Korean elderly population.
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Affiliation(s)
- S Kim
- Chang Won Won, MD. Ph.D, Elderly Frailty Research Center, Department of Family Medicine, Kyung Hee University College of Medicine, Kyungheedaero 23, Dongdaemun-gu, Seoul, 02447 Republic of Korea.Tel: +82 2 958 8700; E-mail:
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Sharma P, Radhakrishnan S, Khil MS, Kim HY, Kim BS. Simple room temperature synthesis of porous nickel phosphate foams for electrocatalytic ethanol oxidation. J Electroanal Chem (Lausanne) 2018. [DOI: 10.1016/j.jelechem.2017.12.025] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Saravanakumar B, Jayaseelan SS, Seo MK, Kim HY, Kim BS. NiCo 2S 4 nanosheet-decorated 3D, porous Ni film@Ni wire electrode materials for all solid-state asymmetric supercapacitor applications. Nanoscale 2017; 9:18819-18834. [PMID: 29177332 DOI: 10.1039/c7nr06725a] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Wire type supercapacitors with high energy and power densities have generated considerable interest in wearable applications. Herein, we report a novel NiCo2S4-decorated 3D, porous Ni film@Ni wire electrode for high performance supercapacitor application. In this work, a facile method is introduced to fabricate a 3D, porous Ni film deposited on a Ni wire as a flexible electrode, followed by decoration with NiCo2S4 as an electroactive material. The fabricated NiCo2S4-decorated 3D, porous Ni film@Ni wire electrode displays a superior performance with an areal and volumetric capacitance of 1.228 F cm-2 and 199.74 F cm-3, respectively, at a current density of 0.2 mA cm-1 with a maximum volumetric energy and power density (EV: 6.935 mW h cm-3; PV: 1.019 W cm-3). Finally, the solid state asymmetric wire type supercapacitor is fabricated using the fabricated NiCo2S4-decorated 3D, porous Ni film@Ni wire as a positive electrode and N-doped reduced graphene oxide (N-rGO) as a negative electrode and this exhibits good areal and volumetric capacitances of CA: 0.12 F cm-2 and CV: 19.57 F cm-2 with a higher rate capability (92%). This asymmetric wire type supercapacitor demonstrates a low leakage current and self-discharge with a maximum volumetric energy (EV: 5.33 mW h cm-3) and power (PV: 855.69 mW cm-3) density.
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Affiliation(s)
- Balasubramaniam Saravanakumar
- Department of BIN Convergence Technology, Chonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do 54896, Republic of Korea.
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Lei D, Li XD, Seo MK, Khil MS, Kim HY, Kim BS. NiCo2O4 nanostructure-decorated PAN/lignin based carbon nanofiber electrodes with excellent cyclability for flexible hybrid supercapacitors. POLYMER 2017. [DOI: 10.1016/j.polymer.2017.10.051] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Yamanaka S, Tajiri S, Fujimoto T, Matsumoto K, Fukunaga S, Kim BS, Okano HJ, Yokoo T. Generation of interspecies limited chimeric nephrons using a conditional nephron progenitor cell replacement system. Nat Commun 2017; 8:1719. [PMID: 29170512 PMCID: PMC5701015 DOI: 10.1038/s41467-017-01922-5] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2017] [Accepted: 10/25/2017] [Indexed: 01/08/2023] Open
Abstract
Animal fetuses and embryos may have applications in the generation of human organs. Progenitor cells may be an appropriate cell source for regenerative organs because of their safety and availability. However, regenerative organs derived from exogenous lineage progenitors in developing animal fetuses have not yet been obtained. Here, we established a combination system through which donor cells could be precisely injected into the nephrogenic zone and native nephron progenitor cells (NPCs) could be eliminated in a time- and tissue-specific manner. We successfully achieved removal of Six2+ NPCs within the nephrogenic niche and complete replacement of transplanted NPCs with donor cells. These NPCs developed into mature glomeruli and renal tubules, and blood flow was observed following transplantation in vivo. Furthermore, this artificial nephron could be obtained using NPCs from different species. Thus, this technique enables in vivo differentiation from progenitor cells into nephrons, providing insights into nephrogenesis and organ regeneration. The transplantation of tissue-specific progenitor cells may be an approach in organ regeneration. Here the authors show that the nephron progenitor population of a developing mouse kidney, when ablated, can be replaced by exogenously supplied rat nephron progenitors, generating interspecies nephrons.
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Affiliation(s)
- S Yamanaka
- Division of Nephrology and Hypertension, Department of Internal Medicine, Jikei University School of Medicine, Tokyo, 1058461, Japan
| | - S Tajiri
- Division of Nephrology and Hypertension, Department of Internal Medicine, Jikei University School of Medicine, Tokyo, 1058461, Japan.,Division of Regenerative Medicine, Jikei University School of Medicine, Tokyo, 1058461, Japan
| | - T Fujimoto
- Division of Nephrology and Hypertension, Department of Internal Medicine, Jikei University School of Medicine, Tokyo, 1058461, Japan.,Division of Regenerative Medicine, Jikei University School of Medicine, Tokyo, 1058461, Japan
| | - K Matsumoto
- Division of Nephrology and Hypertension, Department of Internal Medicine, Jikei University School of Medicine, Tokyo, 1058461, Japan
| | - S Fukunaga
- Division of Nephrology and Hypertension, Department of Internal Medicine, Jikei University School of Medicine, Tokyo, 1058461, Japan.,Department of Internal Medicine IV, Shimane University, Izumo, Shimane, 6938501, Japan
| | - B S Kim
- Division of Regenerative Medicine, Jikei University School of Medicine, Tokyo, 1058461, Japan.,Department of Urology, Kyungpook National University School of Medicine, Daegu, 41944, Korea
| | - H J Okano
- Division of Regenerative Medicine, Jikei University School of Medicine, Tokyo, 1058461, Japan
| | - T Yokoo
- Division of Nephrology and Hypertension, Department of Internal Medicine, Jikei University School of Medicine, Tokyo, 1058461, Japan.
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Park MY, Lee JS, Jin HJ, You HS, Kim GW, Ko HC, Kim BS, Kim MB, Kim HS. Localized argyria: troublesome side-effect of acupuncture. J Eur Acad Dermatol Venereol 2017; 32:e62-e65. [PMID: 28833654 DOI: 10.1111/jdv.14526] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- M Y Park
- Department of Dermatology, School of Medicine, Pusan National University, Busan, Korea
| | - J S Lee
- Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Gyeongbuk, Korea
| | - H J Jin
- Department of Dermatology, School of Medicine, Pusan National University, Busan, Korea
| | - H S You
- Department of Dermatology, School of Medicine, Pusan National University, Busan, Korea
| | - G W Kim
- Department of Dermatology, School of Medicine, Pusan National University, Busan, Korea
| | - H C Ko
- Department of Dermatology, School of Medicine, Pusan National University, Busan, Korea
| | - B S Kim
- Department of Dermatology, School of Medicine, Pusan National University, Busan, Korea.,Biomedical Research Institute, Pusan National University Hospital, Busan, Korea
| | - M B Kim
- Department of Dermatology, School of Medicine, Pusan National University, Busan, Korea.,Biomedical Research Institute, Pusan National University Hospital, Busan, Korea
| | - H S Kim
- Department of Dermatology, School of Medicine, Pusan National University, Busan, Korea.,Biomedical Research Institute, Pusan National University Hospital, Busan, Korea
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Ko TH, Lei D, Balasubramaniam S, Seo MK, Chung YS, Kim HY, Kim BS. Polypyrrole-Decorated Hierarchical NiCo2O4 Nanoneedles/Carbon Fiber Papers for Flexible High-Performance Supercapacitor Applications. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.07.047] [Citation(s) in RCA: 66] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Seon CR, Hong JH, Song I, Jang J, Lee HY, An YH, Kim BS, Jeon TM, Park JS, Choe W, Lee HG, Pak S, Cheon MS, Choi JH, Kim HS, Biel W, Bernascolle P, Barnsley R. VUV spectroscopy in impurity injection experiments at KSTAR using prototype ITER VUV spectrometer. Rev Sci Instrum 2017; 88:083511. [PMID: 28863699 DOI: 10.1063/1.4998970] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The ITER vacuum ultra-violet (VUV) core survey spectrometer has been designed as a 5-channel spectral system so that the high spectral resolving power of 200-500 could be achieved in the wavelength range of 2.4-160 nm. To verify the design of the ITER VUV core survey spectrometer, a two-channel prototype spectrometer was developed. As a subsequent step of the prototype test, the prototype VUV spectrometer has been operated at KSTAR since the 2012 experimental campaign. From impurity injection experiments in the years 2015 and 2016, strong emission lines, such as Kr xxv 15.8 nm, Kr xxvi 17.9 nm, Ne vii 46.5 nm, Ne vi 40.2 nm, and an array of largely unresolved tungsten lines (14-32 nm) could be measured successfully, showing the typical photon number of 1013-1015 photons/cm2 s.
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Affiliation(s)
- C R Seon
- National Fusion Research Institute, Gwahangno, 169-148 Yuseong-gu, Daejeon, South Korea
| | - J H Hong
- Korea Advanced Institute of Science and Technology, Daehak-ro, 291 Yuseong-gu, Daejeon, South Korea
| | - I Song
- Korea Advanced Institute of Science and Technology, Daehak-ro, 291 Yuseong-gu, Daejeon, South Korea
| | - J Jang
- Korea Advanced Institute of Science and Technology, Daehak-ro, 291 Yuseong-gu, Daejeon, South Korea
| | - H Y Lee
- Korea Advanced Institute of Science and Technology, Daehak-ro, 291 Yuseong-gu, Daejeon, South Korea
| | - Y H An
- National Fusion Research Institute, Gwahangno, 169-148 Yuseong-gu, Daejeon, South Korea
| | - B S Kim
- Department of Energy Systems Research, Ajou University, Suwon 443-749, South Korea
| | - T M Jeon
- Korea Advanced Institute of Science and Technology, Daehak-ro, 291 Yuseong-gu, Daejeon, South Korea
| | - J S Park
- Korea Advanced Institute of Science and Technology, Daehak-ro, 291 Yuseong-gu, Daejeon, South Korea
| | - W Choe
- Korea Advanced Institute of Science and Technology, Daehak-ro, 291 Yuseong-gu, Daejeon, South Korea
| | - H G Lee
- National Fusion Research Institute, Gwahangno, 169-148 Yuseong-gu, Daejeon, South Korea
| | - S Pak
- National Fusion Research Institute, Gwahangno, 169-148 Yuseong-gu, Daejeon, South Korea
| | - M S Cheon
- National Fusion Research Institute, Gwahangno, 169-148 Yuseong-gu, Daejeon, South Korea
| | - J H Choi
- National Fusion Research Institute, Gwahangno, 169-148 Yuseong-gu, Daejeon, South Korea
| | - H S Kim
- National Fusion Research Institute, Gwahangno, 169-148 Yuseong-gu, Daejeon, South Korea
| | - W Biel
- Institut für Plasmaphysik, Forschungszentrum Jülich Gmbh, EURATOM Association, Trilateral Euregio Cluster, D-52425 Jülich, Germany
| | - P Bernascolle
- ITER Organization, Route de Vinon-sur-Verdon - CS 90 046, 13067 Saint-Paul-lez-Durance, France
| | - R Barnsley
- ITER Organization, Route de Vinon-sur-Verdon - CS 90 046, 13067 Saint-Paul-lez-Durance, France
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Abstract
Hepatocyte-based therapies (e.g., hepatocyte transplantation and extracorporeal support devices) may provide alternative therapies to treat patients with liver disease, but suitable approaches to localize these cells to a given location while maintaining liver-specific gene expression must be developed. The suitability of highly porous three-dimensional sponges fabricated from poly (l-lactic acid) [PLLA] as an hepatocyte culture system was evaluated in this study. Sponges were fabricated utilizing a particulate leaching technique, and were approximately 95% porous, with an average pore diameter of 180 μm. Hepatocytes seeded into these sponges adhered and remained viable for 14 days. However, the secretion rate of albumin from these cells, an indication of liver-specific gene expression, was low (approximately 6 pg/cell/day at day 1), and decreased steadily over the 14 days of the experiment. Coating sponges with collagen, and more preferably, immobilizing cells within the PLLA sponges with a collagen gel, led to enhanced cell survival and albumin secretion at all time points. These data suggest that porous PLLA sponges may provide a novel system for long-term culture of hepatocytes, and proper design of the system may allow the liver-specific gene expression of hepatocytes transplanted in these matrices to be enhanced.
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Affiliation(s)
- P M Kaufmann
- Department of Surgery, University of Hamburg Medical Center, Germany
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Kim BS, Lee JG, Cho Y, Song SH, Huh KH, Kim MS, Kim YS. Reduction of Slit Diaphragm-associated Molecules by Sirolimus: Is it Enough to Induce Proteinuria? Transplant Proc 2017; 49:1165-1169. [PMID: 28583549 DOI: 10.1016/j.transproceed.2017.03.021] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Sirolimus (SRL), a mammalian target of rapamycin inhibitor, is widely used in transplantation, but the mechanisms whereby it induces adverse effects, such as proteinuria and edema, remain unclear. To determine whether isolated SRL induces proteinuria or not, the authors intraperitoneally injected C57BL/6 mice with different doses of SRL (0 mg/[kg·d], 3 mg/[kg·d], 10 mg/[kg·d], or 30 mg/[kg·d]) for 24 days. Urinary albumin excretion was then quantified using a double-sandwich enzyme-linked immunosorbent assay, and serum creatinine levels were measured using a single dry-film chemistry auto-analyzer. The mRNA expression levels of various genes were also measured by polymerase chain reaction. Urinary albumin was not detected in the SRL-treated mice, but serum creatinine levels were found to increase dose-dependently and were significantly higher in the animals treated with 30 mg/kg of SRL than in untreated controls. Glomerular mRNA expression profiling showed down-regulations of podocyte-related genes (Wilms tumor 1, synaptopodin, nephrin, CD2-associated protein, and podocin) and of transforming growth factor-beta (a marker of fibrosis) in sirolimus-treated mice. In addition, expressions of the antiapoptotic genes Bcl-2 and Bcl-xL were also down-regulated. Furthermore, the protein levels of these genes in mice kidney were also decreased by sirolimus. Although sirolimus treatment reduced the expressions of slit diaphragm-associated molecules and increased serum creatinine levels, it failed to induce proteinuria. Our findings indicate that proteinuria is not induced by isolated SRL treatment. Further studies are required to identify conditions in which sirolimus induces proteinuria.
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Affiliation(s)
- B S Kim
- The Research Institute for Transplantation, Yonsei University College of Medicine, Seoul, Republic of Korea; Division of Nephrolgy, Department of Internal Medicine, Severance Hospital, Yonsei University Health System, Seoul, Republic of Korea
| | - J G Lee
- The Research Institute for Transplantation, Yonsei University College of Medicine, Seoul, Republic of Korea; Department of Transplantation Surgery, Severance Hospital, Yonsei University Health System, Seoul, Republic of Korea
| | - Y Cho
- The Research Institute for Transplantation, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - S H Song
- The Research Institute for Transplantation, Yonsei University College of Medicine, Seoul, Republic of Korea; Department of Transplantation Surgery, Severance Hospital, Yonsei University Health System, Seoul, Republic of Korea
| | - K H Huh
- The Research Institute for Transplantation, Yonsei University College of Medicine, Seoul, Republic of Korea; Department of Transplantation Surgery, Severance Hospital, Yonsei University Health System, Seoul, Republic of Korea
| | - M S Kim
- The Research Institute for Transplantation, Yonsei University College of Medicine, Seoul, Republic of Korea; Department of Transplantation Surgery, Severance Hospital, Yonsei University Health System, Seoul, Republic of Korea
| | - Y S Kim
- The Research Institute for Transplantation, Yonsei University College of Medicine, Seoul, Republic of Korea; Department of Transplantation Surgery, Severance Hospital, Yonsei University Health System, Seoul, Republic of Korea.
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