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Moon HG, Bae S, Chae Y, Kim YJ, Kim HM, Song M, Bae MS, Lee CH, Ha T, Seo JS, Kim S. Assessment of potential ecological risk for polycyclic aromatic hydrocarbons in urban soils with high level of atmospheric particulate matter concentration. Ecotoxicol Environ Saf 2024; 272:116014. [PMID: 38295737 DOI: 10.1016/j.ecoenv.2024.116014] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2023] [Revised: 11/06/2023] [Accepted: 01/21/2024] [Indexed: 02/25/2024]
Abstract
Polycyclic aromatic hydrocarbons (PAHs) are known to be representative carcinogenic environmental pollutants with high toxicity. However, information on the potential ecological and environmental risks of PAH contamination in soil remains scarce. Thus, this study was evaluated the potential ecological risks of PAHs in soils of five Korean areas (Gunsan (GS), Gwangju, Yeongnam, Busan, and Gangwon) using organic carbon (OC)-normalized analysis, mean effect range-median quotient (M-ERM-Q), toxic equivalent quantity (TEQ) analysis, and risk quotient (RQ) derived by the species sensitivity distribution model. In this study, atmospheric particulate matter has a significant effect on soil pollution in GS through the presence of hopanes and the similar pattern of PAHs in soil and atmospheric PAHs. From analysis of source identification, combustion sources in soils of GS were important PAH sources. For PAHs in soils of GS, the OC-normalized analysis, M-ERM-Q, and TEQ analysis have 26.78 × 105 ng/g-OC, 0.218, and 49.72, respectively. Therefore, the potential ecological risk assessment results showed that GS had moderate-high ecological risk and moderate-high carcinogenic risk, whereas the other regions had low ecological risk and low-moderate carcinogenic risk. The risk level (M-ERM-Q) of PAH contamination in GS was similar to that in Changchun and Xiangxi Bay in China. The Port Harcourt City in Nigeria for PAH has the highest risk (M-ERM-Q = 4.02 and TEQ = 7923). Especially, compared to China (RQPhe =0.025 and 0.05), and Nigeria (0.059), phenanthrene showed the highest ecological risk in Korea (0.001-0.18). Korea should focus on controlling the release of PAHs originating from the PM in GS.
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Affiliation(s)
- Hi Gyu Moon
- Ecological Risk Assessment Center, Gyeongnam Branch Institute, Korea Institute of Toxicology (KIT), Jinju 52834, the Republic of Korea
| | - Seonhee Bae
- Ecological Risk Assessment Center, Gyeongnam Branch Institute, Korea Institute of Toxicology (KIT), Jinju 52834, the Republic of Korea
| | - Yooeun Chae
- Ecological Risk Assessment Center, Gyeongnam Branch Institute, Korea Institute of Toxicology (KIT), Jinju 52834, the Republic of Korea
| | - Yong-Jae Kim
- Medical Industry Venture Center, Korea Testing Laboratory, Wonju 26495, the Republic of Korea
| | - Hyung-Min Kim
- Ecological Risk Assessment Center, Gyeongnam Branch Institute, Korea Institute of Toxicology (KIT), Jinju 52834, the Republic of Korea
| | - Mijung Song
- Department of Earth and Environmental Sciences, Jeonbuk National University, the Republic of Korea
| | - Min-Suk Bae
- Department of Environmental Engineering, Mokpo National University, Muan 58554, the Republic of Korea
| | - Chil-Hyoung Lee
- Green Energy & Nano Technology R&D Group, Korea Institute of Industrial Technology, Gwangju 61012, the Republic of Korea
| | - Taewon Ha
- Green Energy & Nano Technology R&D Group, Korea Institute of Industrial Technology, Gwangju 61012, the Republic of Korea
| | - Jong-Su Seo
- Ecological Risk Assessment Center, Gyeongnam Branch Institute, Korea Institute of Toxicology (KIT), Jinju 52834, the Republic of Korea.
| | - Sooyeon Kim
- Ecological Risk Assessment Center, Gyeongnam Branch Institute, Korea Institute of Toxicology (KIT), Jinju 52834, the Republic of Korea.
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Chae Y, Bae S, Moon HG, Kim YJ, Park CB, Park JW, Kim DW, Seo JS, Kim S. Identification of aquatic ecological risk of bisphenol S in four Asian countries based on the SSD and alternative toxicity data of model species Danio rerio. Environ Sci Pollut Res Int 2023:10.1007/s11356-023-27915-0. [PMID: 37256405 DOI: 10.1007/s11356-023-27915-0] [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] [Grants] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Accepted: 05/19/2023] [Indexed: 06/01/2023]
Abstract
Bisphenol S (BPS), an organic compound and bisphenol analog, is commonly used as a substitute for bisphenol A. BPS is widely used in epoxy glues, can coatings, and thermal receipt papers; however, its risks have not been fully determined and the probability of its toxicity has been continuously suggested. In this study, we conducted BPS toxicity tests on aquatic plants (acute), cladocerans (acute and chronic), and fish (chronic) to determine its adverse effects, and calculated the toxicity values. Additionally, we conducted an ecological risk assessment of BPS in freshwater ecosystems with toxicity data from previous studies using the species sensitivity distribution method and BPS exposure data from 14 rivers in four countries in Asia (China, Japan, India, and South Korea). The chronic-based risk quotient (RQ) values of BPS in one river in China and two rivers in India were > 1, indicating a high ecological risk of BPS to aquatic organisms. The other four rivers in China showed medium ecological risk (0.1 < RQ < 1) and those in Japan and South Korea showed negligible chronic risk (RQ < 0.1) to aquatic organisms. We also suggest sensitive indicators in the model organism Danio rerio and highlighted the importance of the development of new method of ecological risk assessment. This study could provide new information that will assist in managing BPS and bisphenol analogs in freshwater ecosystems.
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Affiliation(s)
- Yooeun Chae
- Ecological Risk Assessment Center, Gyeongnam Branch Institute, Korea Institute of Toxicology (KIT), Jinju, 52834, Republic of Korea
| | - Seonhee Bae
- Ecological Risk Assessment Center, Gyeongnam Branch Institute, Korea Institute of Toxicology (KIT), Jinju, 52834, Republic of Korea
| | - Hi Gyu Moon
- Ecological Risk Assessment Center, Gyeongnam Branch Institute, Korea Institute of Toxicology (KIT), Jinju, 52834, Republic of Korea
| | - Yong-Jae Kim
- Medical Industry Venture Center, Korea Testing Laboratory, Wonju, 26495, Republic of Korea
| | - Chang-Beom Park
- Environmental Exposure & Toxicology Research Center, Korea Institute of Toxicology (KIT), Jinju, 52834, Republic of Korea
| | - June-Woo Park
- Environmental Exposure & Toxicology Research Center, Korea Institute of Toxicology (KIT), Jinju, 52834, Republic of Korea
| | - Dae-Wook Kim
- Environmental Safety-Assessment Center, Korea Institute of Toxicology (KIT), Jinju, 52834, Republic of Korea
| | - Jong-Su Seo
- Gyeongnam Branch Institute, Korea Institute of Toxicology (KIT), Jinju, 52834, Republic of Korea
| | - Sooyeon Kim
- Ecological Risk Assessment Center, Gyeongnam Branch Institute, Korea Institute of Toxicology (KIT), Jinju, 52834, Republic of Korea.
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Han BH, Jang SH, Jang YJ, Na SW, Yoon JJ, Moon HG, Kim SY, Seo CS, Lee HS, Lee YM, Kang DG, Lee YJ. Diesel vehicles-derived PM2.5 induces lung and cardiovascular injury attenuates by Securiniga suffruticosa: Involvement of NF-κB-mediated NLRP3 inflammasome activation pathway. Biomed Pharmacother 2023; 162:114637. [PMID: 37027986 DOI: 10.1016/j.biopha.2023.114637] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Revised: 03/29/2023] [Accepted: 03/30/2023] [Indexed: 04/09/2023] Open
Abstract
Respiratory exposure to Particulate matter (PM), including Diesel exhaust particulate (DEP), causes oxidative stress-induced lung inflammation. Especially, fine particulate matter with an aerodynamic diameter less than 2.5 µm (PM2.5) is a serious air pollutant associated with various health problems including cardiovascular diseases. The present study aimed to examine the inhibitory effect of Securiniga suffruticosa (S. suffruiticosa) on DEP and PM-induced lung and cardiovascular diseases. Mice inhaled DEP by using nebulizer chamber for two weeks. Treatment with S. suffruiticosa reduced the expression of C-X-C motif ligand 1/2 in bronchoalveolar lavage fluid and Muc5ac, ICAM-1, TNF-⍺, IL-6 mRNA in lung were also attenuated by S. suffruiticosa. In thoracic aorta, DEP increased CAMs, TNF-⍺ and inflammasome markers such as NLRP3, Caspase-1, and ASC. However, S. suffruiticosa suppressed these levels. S. suffruiticosa inhibited PM2.5 induced production of intracellular reactive oxygen species (ROS); and inhibited the translocation of NF-κB p65 to the nucleus in human umbilical vein endothelial cells. Taken together, this study proved that exposure to PM2.5 induced both lung and vascular inflammation, however, S. suffruiticosa attenuated this injury via the downregulation of the NLRP3 signaling pathway. These findings suggest that S. suffruiticosa may have potential therapeutic benefit against air pollution-mediated lung and cardiovascular diseases.
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Affiliation(s)
- Byung Hyuk Han
- Hanbang Cardio-Renal Syndrome Research Center, Wonkwang University, 460, Iksan-daero, Iksan, Jeonbuk 54538, Republic of Korea; College of Korean Medicine and Professional Graduate School of Korea Medicine, Wonkwang University, 460, Iksan-daero, Iksan, Jeonbuk 54538, Republic of Korea
| | - Se Hoon Jang
- Hanbang Cardio-Renal Syndrome Research Center, Wonkwang University, 460, Iksan-daero, Iksan, Jeonbuk 54538, Republic of Korea; College of Korean Medicine and Professional Graduate School of Korea Medicine, Wonkwang University, 460, Iksan-daero, Iksan, Jeonbuk 54538, Republic of Korea
| | - Youn Jae Jang
- Hanbang Cardio-Renal Syndrome Research Center, Wonkwang University, 460, Iksan-daero, Iksan, Jeonbuk 54538, Republic of Korea; College of Korean Medicine and Professional Graduate School of Korea Medicine, Wonkwang University, 460, Iksan-daero, Iksan, Jeonbuk 54538, Republic of Korea
| | - Se Won Na
- Hanbang Cardio-Renal Syndrome Research Center, Wonkwang University, 460, Iksan-daero, Iksan, Jeonbuk 54538, Republic of Korea; College of Korean Medicine and Professional Graduate School of Korea Medicine, Wonkwang University, 460, Iksan-daero, Iksan, Jeonbuk 54538, Republic of Korea
| | - Jung Joo Yoon
- Hanbang Cardio-Renal Syndrome Research Center, Wonkwang University, 460, Iksan-daero, Iksan, Jeonbuk 54538, Republic of Korea; College of Korean Medicine and Professional Graduate School of Korea Medicine, Wonkwang University, 460, Iksan-daero, Iksan, Jeonbuk 54538, Republic of Korea
| | - Hi Gyu Moon
- Center for Ecological Risk Assessment, Gyeongnam Branch Institute, Korea Institute of Toxicology, Jinju 52834, Republic of Korea
| | - Soo Yeon Kim
- Center for Ecological Risk Assessment, Gyeongnam Branch Institute, Korea Institute of Toxicology, Jinju 52834, Republic of Korea
| | - Chang Seob Seo
- KM Science Research Division, Korea Institute of Oriental Medicine, 34054 Daejeon, Republic of Korea
| | - Ho Sub Lee
- Hanbang Cardio-Renal Syndrome Research Center, Wonkwang University, 460, Iksan-daero, Iksan, Jeonbuk 54538, Republic of Korea; College of Korean Medicine and Professional Graduate School of Korea Medicine, Wonkwang University, 460, Iksan-daero, Iksan, Jeonbuk 54538, Republic of Korea
| | - Young Mi Lee
- Department of Oriental Pharmacy, College of Pharmacy and Wonkwang-Oriental Medicines Research Institute, Wonkwang University, Iksan 54538, Republic of Korea
| | - Dae Gill Kang
- Hanbang Cardio-Renal Syndrome Research Center, Wonkwang University, 460, Iksan-daero, Iksan, Jeonbuk 54538, Republic of Korea; College of Korean Medicine and Professional Graduate School of Korea Medicine, Wonkwang University, 460, Iksan-daero, Iksan, Jeonbuk 54538, Republic of Korea.
| | - Yun Jung Lee
- Department of Oriental Pharmacy, College of Pharmacy and Wonkwang-Oriental Medicines Research Institute, Wonkwang University, Iksan 54538, Republic of Korea.
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Moon HG, Jung Y, Shin B, Lee D, Kim K, Woo DH, Lee S, Kim S, Kang CY, Lee T, Kim C. Identification of Chemical Vapor Mixture Assisted by Artificially Extended Database for Environmental Monitoring. Sensors (Basel) 2022; 22:s22031169. [PMID: 35161915 PMCID: PMC8840270 DOI: 10.3390/s22031169] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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: 12/15/2021] [Revised: 01/21/2022] [Accepted: 01/30/2022] [Indexed: 05/06/2023]
Abstract
A fully integrated sensor array assisted by pattern recognition algorithm has been a primary candidate for the assessment of complex vapor mixtures based on their chemical fingerprints. Diverse prototypes of electronic nose systems consisting of a multisensory device and a post processing engine have been developed. However, their precision and validity in recognizing chemical vapors are often limited by the collected database and applied classifiers. Here, we present a novel way of preparing the database and distinguishing chemical vapor mixtures with small data acquisition for chemical vapors and their mixtures of interest. The database for individual vapor analytes is expanded and the one for their mixtures is prepared in the first-order approximation. Recognition of individual target vapors of NO2, HCHO, and NH3 and their mixtures was evaluated by applying the support vector machine (SVM) classifier in different conditions of temperature and humidity. The suggested method demonstrated the recognition accuracy of 95.24%. The suggested method can pave a way to analyze gas mixtures in a variety of industrial and safety applications.
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Affiliation(s)
- Hi Gyu Moon
- Center for Ecological Risk Assessment, Korea Institute of Toxicology (KIT), Jinju 52834, Korea; (H.G.M.); (S.K.)
| | - Youngmo Jung
- Sensor System Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea; (Y.J.); (B.S.); (D.L.); (K.K.); (D.H.W.); (S.L.)
| | - Beomju Shin
- Sensor System Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea; (Y.J.); (B.S.); (D.L.); (K.K.); (D.H.W.); (S.L.)
| | - Donggeun Lee
- Sensor System Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea; (Y.J.); (B.S.); (D.L.); (K.K.); (D.H.W.); (S.L.)
| | - Kayoung Kim
- Sensor System Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea; (Y.J.); (B.S.); (D.L.); (K.K.); (D.H.W.); (S.L.)
| | - Deok Ha Woo
- Sensor System Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea; (Y.J.); (B.S.); (D.L.); (K.K.); (D.H.W.); (S.L.)
| | - Seok Lee
- Sensor System Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea; (Y.J.); (B.S.); (D.L.); (K.K.); (D.H.W.); (S.L.)
| | - Sooyeon Kim
- Center for Ecological Risk Assessment, Korea Institute of Toxicology (KIT), Jinju 52834, Korea; (H.G.M.); (S.K.)
| | - Chong-Yun Kang
- Center for Electronic Materials, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea;
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 02841, Korea
| | - Taikjin Lee
- Sensor System Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea; (Y.J.); (B.S.); (D.L.); (K.K.); (D.H.W.); (S.L.)
- Correspondence: (T.L.); (C.K.)
| | - Chulki Kim
- Sensor System Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea; (Y.J.); (B.S.); (D.L.); (K.K.); (D.H.W.); (S.L.)
- Correspondence: (T.L.); (C.K.)
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Lee KS, Shim J, Lee JS, Lee J, Moon HG, Park YJ, Park D, Son DI. Adsorption behavior of NO2 molecules in ZnO-mono/multilayer graphene core–shell quantum dots for NO2 gas sensor. J IND ENG CHEM 2022. [DOI: 10.1016/j.jiec.2021.11.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Moon HG, Jung Y, Shin B, Song YG, Kim JH, Lee T, Lee S, Jun SC, Kaner RB, Kang C, Kim C. On-Chip Chemiresistive Sensor Array for On-Road NO x Monitoring with Quantification. Adv Sci (Weinh) 2020; 7:2002014. [PMID: 33240761 PMCID: PMC7675194 DOI: 10.1002/advs.202002014] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 07/10/2020] [Indexed: 05/03/2023]
Abstract
The adverse effects of air pollution on respiratory health make air quality monitoring with high spatial and temporal resolutions essential especially in cities. Despite considerable interest and efforts, the application of various types of sensors is considered immature owing to insufficient sensitivity and cross-interference under ambient conditions. Here, a fully integrated chemiresistive sensor array (CSA) with parts-per-trillion sensitivity is demonstrated with its application for on-road NO x monitoring. An analytical model is suggested to describe the kinetics of the sensor responses and quantify molecular binding affinities. Finally, the full characterization of the system is connected to implement on-road measurements on NO x vapor with quantification as its ultimate field application. The obtained results suggest that the CSA shows potential as an essential unit to realize an air-quality monitoring network with high spatial and temporal resolutions.
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Affiliation(s)
- Hi Gyu Moon
- National Center for Efficacy Evaluation of Respiratory Disease ProductKorea Institute of ToxicologyJeongeupJeollabuk‐do56212Republic of Korea
- Center for Electronic MaterialsKorea Institute of Science and Technology (KIST)Seoul02792Republic of Korea
- Department of Chemistry and BiochemistryUniversity of CaliforniaLos AngelesCA90095USA
| | - Youngmo Jung
- Sensor System Research CenterKorea Institute of Science and Technology (KIST)Seoul02792Republic of Korea
- Department of Material Science and EngineeringYonsei UniversitySeoul03722Republic of Korea
| | - Beomju Shin
- Sensor System Research CenterKorea Institute of Science and Technology (KIST)Seoul02792Republic of Korea
| | - Young Geun Song
- Center for Electronic MaterialsKorea Institute of Science and Technology (KIST)Seoul02792Republic of Korea
| | - Jae Hun Kim
- Sensor System Research CenterKorea Institute of Science and Technology (KIST)Seoul02792Republic of Korea
| | - Taikjin Lee
- Sensor System Research CenterKorea Institute of Science and Technology (KIST)Seoul02792Republic of Korea
| | - Seok Lee
- Sensor System Research CenterKorea Institute of Science and Technology (KIST)Seoul02792Republic of Korea
| | - Seong Chan Jun
- Department of Material Science and EngineeringYonsei UniversitySeoul03722Republic of Korea
| | - Richard B. Kaner
- Department of Chemistry and BiochemistryUniversity of CaliforniaLos AngelesCA90095USA
- Department of Materials Science and EngineeringUniversity of CaliforniaLos AngelesCA90095USA
| | - Chong‐Yun Kang
- Center for Electronic MaterialsKorea Institute of Science and Technology (KIST)Seoul02792Republic of Korea
- KU‐KIST Graduate School of Converging Science and TechnologyKorea UniversitySeoul02841Republic of Korea
| | - Chulki Kim
- Sensor System Research CenterKorea Institute of Science and Technology (KIST)Seoul02792Republic of Korea
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Lee CH, Shim HE, Song L, Moon HG, Lee K, Yang JE, Song HY, Choi YJ, Choi DS, Jeon J. Efficient and stable radiolabeling of polycyclic aromatic hydrocarbon assemblies: in vivo imaging of diesel exhaust particulates in mice. Chem Commun (Camb) 2019; 55:447-450. [DOI: 10.1039/c8cc08304e] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
As a robust radioanalytical method for tracking carbonaceous particulates in vivo, polycyclic aromatic hydrocarbons from diesel exhaust were labeled with a radioactive-iodine-tagged pyrene analogue.
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Affiliation(s)
- Chang Heon Lee
- Advanced Radiation Technology Institute
- Korea Atomic Energy Research Institute
- Jeongeup 56212
- Republic of Korea
| | - Ha Eun Shim
- Advanced Radiation Technology Institute
- Korea Atomic Energy Research Institute
- Jeongeup 56212
- Republic of Korea
| | - Lee Song
- Advanced Radiation Technology Institute
- Korea Atomic Energy Research Institute
- Jeongeup 56212
- Republic of Korea
| | - Hi Gyu Moon
- Jeonbuk Department of Inhalation Research
- Korea Institute of Toxicology
- Jeongeup 56212
- Republic of Korea
| | - Kyuhong Lee
- Jeonbuk Department of Inhalation Research
- Korea Institute of Toxicology
- Jeongeup 56212
- Republic of Korea
| | - Jung Eun Yang
- World Institute of Kimchi
- Gwangju 61755
- Republic of Korea
| | - Ha Yeon Song
- Advanced Radiation Technology Institute
- Korea Atomic Energy Research Institute
- Jeongeup 56212
- Republic of Korea
| | - Yong Jun Choi
- School of Environmental Engineering
- University of Seoul
- Seoul 02504
- Republic of Korea
| | - Dae Seong Choi
- Advanced Radiation Technology Institute
- Korea Atomic Energy Research Institute
- Jeongeup 56212
- Republic of Korea
| | - Jongho Jeon
- Advanced Radiation Technology Institute
- Korea Atomic Energy Research Institute
- Jeongeup 56212
- Republic of Korea
- Radiation Biotechnology and Applied Radioisotope Science
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Lee J, Bubar CT, Moon HG, Kim J, Busnaina A, Lee H, Shefelbine SJ. Measuring Bone Biomarker Alkaline Phosphatase with Wafer-Scale Nanowell Array Electrodes. ACS Sens 2018; 3:2709-2715. [PMID: 30460852 DOI: 10.1021/acssensors.8b01298] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Biosensors that can analyze a single drop of biological fluid can overcome limitations such as extraction volume from humans or animals, ethical problems, time, and cost. In this work, we have developed a highly sensitive electrochemical (EC) biosensor based on a nanowell array (NWA) for the detection of alkaline phosphatase (ALP), a serum indicator of bone formation. The size of the electrode is 2 × 1 mm2 and has over 10 million nanowells (400 nm diameter) arranged uniformly on the electrode surface. For detecting ALP, anti-ALP was immobilized and oriented on the NWA surface using a self-assembled monolayer and protein G. EC impedance spectroscopy (EIS) was used to determine the amount of ALP in 10 μL of sample. The impedance was calibrated with ALP concentration. The NWA has a linear dynamic range from 1 pg/mL to 100 ng/mL with a limit of detection (LOD) at 12 pg/mL. We used the sensor to measure the ALP in real mouse serum from 4, 10, and 20 weeks old mice and compared the results to the standard photometric assay. This work demonstrates the potential of EC NWA sensors to analyze a single drop of a real body fluid sample and to be developed for broad applications.
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Affiliation(s)
- JuKyung Lee
- Department of Mechanical and Industrial Engineering, College of Engineering, Northeastern University, Boston, Massachusetts 02115, United States
- Korea Institute of Toxicology, Jeongeup-Si 56212, Republic of Korea
| | - Cameron T. Bubar
- Department of Mechanical and Industrial Engineering, College of Engineering, Northeastern University, Boston, Massachusetts 02115, United States
| | - Hi Gyu Moon
- Korea Institute of Toxicology, Jeongeup-Si 56212, Republic of Korea
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, United States
| | - Jonghan Kim
- Department of Pharmaceutical Sciences, School of Pharmacy, Bouve College of Health Sciences, Northeastern University, Boston, Massachusetts 02115, United States
| | - Ahmed Busnaina
- Department of Mechanical and Industrial Engineering, College of Engineering, Northeastern University, Boston, Massachusetts 02115, United States
| | - HeaYeon Lee
- Department of Pharmaceutical Sciences, School of Pharmacy, Bouve College of Health Sciences, Northeastern University, Boston, Massachusetts 02115, United States
- Mara Nanotech New York, Inc., New York, New York 10031-9101, United States
| | - Sandra J. Shefelbine
- Department of Mechanical and Industrial Engineering, College of Engineering, Northeastern University, Boston, Massachusetts 02115, United States
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Moon HG, Jung Y, Jun D, Park JH, Chang YW, Park HH, Kang CY, Kim C, Kaner RB. Hollow Pt-Functionalized SnO 2 Hemipill Network Formation Using a Bacterial Skeleton for the Noninvasive Diagnosis of Diabetes. ACS Sens 2018; 3:661-669. [PMID: 29411965 DOI: 10.1021/acssensors.7b00955] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Hollow-structured nanomaterials are presented as an outstanding sensing platform because of their unique combination of high porosity in both the micro- and nanoscale, their biocompatibility, and flexible template applicability. Herein, we introduce a bacterial skeleton method allowing for cost-effective fabrication with nanoscale precision. As a proof-of-concept, we fabricated a hollow SnO2 hemipill network (HSHN) and a hollow Pt-functionalized SnO2 hemipill network (HPN). A superior detecting capability of HPN toward acetone, a diabetes biomarker, was demonstrated at low concentration (200 ppb) under high humidity (RH 80%). The detection limit reaches 3.6 ppb, a level satisfying the minimum requirement for diabetes breath diagnosis. High selectivity of the HPN sensor against C6H6, C7H8, CO, and NO vapors is demonstrated using principal component analysis (PCA), suggesting new applications of HPN for human-activity monitoring and a personal healthcare tool for diagnosing diabetes. The skeleton method can be further employed to mimic nanostructures of biomaterials with unique functionality for broad applications.
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Affiliation(s)
| | | | | | - Ji Hyun Park
- Institute for Pure and Applied Mathematics, University of California, Los Angeles, California 90095, United States
| | - Young Wook Chang
- Department of Materials Science and Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 03722, Korea
| | - Hyung-Ho Park
- Department of Materials Science and Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 03722, Korea
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Hong AR, Kim JH, Lee KH, Kim TY, Im SA, Kim TY, Moon HG, Han WS, Noh DY, Kim SW, Shin CS. Long-term effect of aromatase inhibitors on bone microarchitecture and macroarchitecture in non-osteoporotic postmenopausal women with breast cancer. Osteoporos Int 2017; 28:1413-1422. [PMID: 28083668 DOI: 10.1007/s00198-016-3899-6] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [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: 06/28/2016] [Accepted: 12/28/2016] [Indexed: 12/13/2022]
Abstract
UNLABELLED In non-osteoporotic postmenopausal women with breast cancer, aromatase inhibitors (AIs) negatively affected bone mineral density (BMD), lumbar spine trabecular bone score (TBS) as a bone microarchitecture index, and hip geometry as a bone macroarchitecture index. INTRODUCTION AIs increase the risk of fracture in patients with breast cancer. Therefore, we aimed to evaluate the long-term skeletal effects of AIs in postmenopausal women with primary breast cancer. METHODS We performed a retrospective longitudinal observational study in non-osteoporotic patients with breast cancer who were treated with AIs for ≥3 years (T-score >-2.5). Patients with previous anti-osteoporosis treatment or those who were given bisphosphonate during AI treatment were excluded from the analysis. We serially assessed BMD, lumbar spine TBS, and hip geometry using dual-energy X-ray absorptiometry. RESULTS BMD significantly decreased from baseline to 5 years at the lumbar spine (-6.15%), femur neck (-7.12%), and total hip (-6.35%). Lumbar spine TBS also significantly decreased from baseline to 5 years (-2.12%); this change remained significant after adjusting for lumbar spine BMD. The annual loss of lumbar spine BMD and TBS slowed after 3 and 1 year of treatment, respectively, although there was a relatively constant loss of BMD at the femur neck and total hip for up to 4 years. The cross-sectional area, cross-sectional moment of inertia, minimal neck width, femur strength index, and section modulus significantly decreased, although the buckling ratio increased over the treatment period (all P < 0.001); these changes were independent of total hip BMD. CONCLUSIONS Long-term adjuvant AI treatment negatively influenced bone quality in addition to BMD in patients with breast cancer. This study suggests that early monitoring and management are needed in non-osteoporotic patients with breast cancer who are starting AIs.
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Affiliation(s)
- A R Hong
- Department of Internal Medicine, Seoul National University College of Medicine, 101 Daehak-ro, Jongno-gu, Seoul, 110-744, South Korea
| | - J H Kim
- Department of Internal Medicine, Seoul National University College of Medicine, 101 Daehak-ro, Jongno-gu, Seoul, 110-744, South Korea.
| | - K H Lee
- Department of Internal Medicine, Seoul National University College of Medicine, 101 Daehak-ro, Jongno-gu, Seoul, 110-744, South Korea
| | - T Y Kim
- Department of Internal Medicine, Seoul National University College of Medicine, 101 Daehak-ro, Jongno-gu, Seoul, 110-744, South Korea
| | - S A Im
- Department of Internal Medicine, Seoul National University College of Medicine, 101 Daehak-ro, Jongno-gu, Seoul, 110-744, South Korea
| | - T Y Kim
- Department of Internal Medicine, Seoul National University College of Medicine, 101 Daehak-ro, Jongno-gu, Seoul, 110-744, South Korea
| | - H G Moon
- Department of Surgery, Seoul National University College of Medicine, Seoul, South Korea
| | - W S Han
- Department of Surgery, Seoul National University College of Medicine, Seoul, South Korea
| | - D Y Noh
- Department of Surgery, Seoul National University College of Medicine, Seoul, South Korea
| | - S W Kim
- Department of Internal Medicine, Seoul National University College of Medicine, 101 Daehak-ro, Jongno-gu, Seoul, 110-744, South Korea
- Department of Internal Medicine, Seoul Metropolitan Government Boramae Medical Center, Seoul, South Korea
| | - C S Shin
- Department of Internal Medicine, Seoul National University College of Medicine, 101 Daehak-ro, Jongno-gu, Seoul, 110-744, South Korea
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11
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Moon HG, Jung Y, Han SD, Shim YS, Shin B, Lee T, Kim JS, Lee S, Jun SC, Park HH, Kim C, Kang CY. Chemiresistive Electronic Nose toward Detection of Biomarkers in Exhaled Breath. ACS Appl Mater Interfaces 2016; 8:20969-76. [PMID: 27456161 DOI: 10.1021/acsami.6b03256] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Detection of gas-phase chemicals finds a wide variety of applications, including food and beverages, fragrances, environmental monitoring, chemical and biochemical processing, medical diagnostics, and transportation. One approach for these tasks is to use arrays of highly sensitive and selective sensors as an electronic nose. Here, we present a high performance chemiresistive electronic nose (CEN) based on an array of metal oxide thin films, metal-catalyzed thin films, and nanostructured thin films. The gas sensing properties of the CEN show enhanced sensitive detection of H2S, NH3, and NO in an 80% relative humidity (RH) atmosphere similar to the composition of exhaled breath. The detection limits of the sensor elements we fabricated are in the following ranges: 534 ppt to 2.87 ppb for H2S, 4.45 to 42.29 ppb for NH3, and 206 ppt to 2.06 ppb for NO. The enhanced sensitivity is attributed to the spillover effect by Au nanoparticles and the high porosity of villi-like nanostructures, providing a large surface-to-volume ratio. The remarkable selectivity based on the collection of sensor responses manifests itself in the principal component analysis (PCA). The excellent sensing performance indicates that the CEN can detect the biomarkers of H2S, NH3, and NO in exhaled breath and even distinguish them clearly in the PCA. Our results show high potential of the CEN as an inexpensive and noninvasive diagnostic tool for halitosis, kidney disorder, and asthma.
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Affiliation(s)
- Hi Gyu Moon
- Center for Electronic Materials, Korea Institute of Science and Technology (KIST) , Seoul 136-791, Republic of Korea
- Department of Material Science and Engineering, Yonsei University , Seoul 120-749, Republic of Korea
| | - Youngmo Jung
- Department of Material Science and Engineering, Yonsei University , Seoul 120-749, Republic of Korea
- Department of Mechanical Engineering, Yonsei University , Seoul 120-749, Republic of Korea
| | - Soo Deok Han
- Center for Electronic Materials, Korea Institute of Science and Technology (KIST) , Seoul 136-791, Republic of Korea
- KU-KIST Graduate School of Converging Science and Technology, Korea University , Seoul 136-701, Republic of Korea
| | - Young-Seok Shim
- Center for Electronic Materials, Korea Institute of Science and Technology (KIST) , Seoul 136-791, Republic of Korea
| | - Beomju Shin
- Sensor System Research Center, Korea Institute of Science and Technology (KIST) , Seoul 136-791, Republic of Korea
| | - Taikjin Lee
- Sensor System Research Center, Korea Institute of Science and Technology (KIST) , Seoul 136-791, Republic of Korea
| | - Jin-Sang Kim
- Center for Electronic Materials, Korea Institute of Science and Technology (KIST) , Seoul 136-791, Republic of Korea
| | - Seok Lee
- Sensor System Research Center, Korea Institute of Science and Technology (KIST) , Seoul 136-791, Republic of Korea
| | - Seong Chan Jun
- Department of Mechanical Engineering, Yonsei University , Seoul 120-749, Republic of Korea
| | - Hyung-Ho Park
- Department of Material Science and Engineering, Yonsei University , Seoul 120-749, Republic of Korea
| | - Chulki Kim
- Sensor System Research Center, Korea Institute of Science and Technology (KIST) , Seoul 136-791, Republic of Korea
| | - Chong-Yun Kang
- Center for Electronic Materials, Korea Institute of Science and Technology (KIST) , Seoul 136-791, Republic of Korea
- KU-KIST Graduate School of Converging Science and Technology, Korea University , Seoul 136-701, Republic of Korea
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Lee ES, Jung SY, Kim JY, Kim JJ, Yoo TK, Kim YG, Lee KS, Lee ES, Kim EK, Min JW, Han W, Noh DY, Moon HG. Identifying the potential long-term survivors among breast cancer patients with distant metastasis. Ann Oncol 2016; 27:828-33. [PMID: 26823524 DOI: 10.1093/annonc/mdw036] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [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: 08/30/2015] [Accepted: 01/15/2016] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND We aimed to develop a prediction model to identify long-term survivors after developing distant metastasis from breast cancer. PATIENTS AND METHODS From the institution's database, we collected data of 547 patients who developed distant metastasis during their follow-ups. We developed a model that predicts the post-metastasis overall survival (PMOS) based on the clinicopathologic factors of the primary tumors and the characteristics of the distant metastasis. For validation, the survival data of 254 patients from four independent institutions were used. RESULTS The median duration of the PMOS was 31.0 months. The characteristics of the initial primary tumor, such as tumor stage, hormone receptor status, and Ki-67 expression level, and the characteristics of the distant metastasis presentation including the duration of disease-free interval, the site of metastasis, and the presence of metastasis-related symptoms were independent prognostic factors determining the PMOS. The association between tumor stage and the PMOS was only seen in tumors with early relapses. The PMOS score, which was developed based on the above six factors, successfully identified patients with superior survival after metastasis. The median PMOS for patients with a PMOS score of <2 and for patients with a PMOS score of >5 were 71.0 and 12 months, respectively. The clinical significance of the PMOS score was further validated using independent multicenter datasets. CONCLUSIONS We have developed a novel prediction model that can classify breast cancer patients with distant metastasis according to their survival after metastasis. Our model can be a valuable tool to identify long-term survivors who can be potential candidates for more intensive multidisciplinary approaches. Furthermore, our model can provide a more reliable survival information for both physicians and patients during their informed decision-making process.
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Affiliation(s)
- E S Lee
- Department of Surgery, Seoul National University College of Medicine, Laboratory of Breast Cancer Biology, Cancer Research Institute, Seoul National University College of Medicine, Seoul
| | - S Y Jung
- Center for Breast Cancer, National Cancer Center, Goyang
| | - J Y Kim
- Department of Surgery, College of Medicine, Gyeongsang National University, Jinju
| | - J J Kim
- Department of Surgery, Seoul National University College of Medicine, Laboratory of Breast Cancer Biology, Cancer Research Institute, Seoul National University College of Medicine, Seoul
| | - T K Yoo
- Department of Surgery, Seoul National University College of Medicine, Laboratory of Breast Cancer Biology, Cancer Research Institute, Seoul National University College of Medicine, Seoul
| | - Y G Kim
- Department of Surgery, Seoul National University College of Medicine, Laboratory of Breast Cancer Biology, Cancer Research Institute, Seoul National University College of Medicine, Seoul
| | - K S Lee
- Center for Breast Cancer, National Cancer Center, Goyang
| | - E S Lee
- Center for Breast Cancer, National Cancer Center, Goyang
| | - E K Kim
- Department of Surgery, Breast Cancer Center, Seoul National University Bundang Hospital, Seongnam
| | - J W Min
- Department of Surgery, Dankook University College of Medicine, Cheonan, Korea
| | - W Han
- Department of Surgery, Seoul National University College of Medicine, Laboratory of Breast Cancer Biology, Cancer Research Institute, Seoul National University College of Medicine, Seoul
| | - D Y Noh
- Department of Surgery, Seoul National University College of Medicine, Laboratory of Breast Cancer Biology, Cancer Research Institute, Seoul National University College of Medicine, Seoul
| | - H G Moon
- Department of Surgery, Seoul National University College of Medicine, Laboratory of Breast Cancer Biology, Cancer Research Institute, Seoul National University College of Medicine, Seoul
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Kang MG, Oh SM, Jung WS, Moon HG, Baek SH, Nahm S, Yoon SJ, Kang CY. Enhanced piezoelectric properties of vertically aligned single-crystalline NKN nano-rod arrays. Sci Rep 2015; 5:10151. [PMID: 25955763 PMCID: PMC4650816 DOI: 10.1038/srep10151] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [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: 09/22/2014] [Accepted: 04/01/2015] [Indexed: 11/30/2022] Open
Abstract
Piezoelectric materials capable of converting between mechanical and electrical energy have a great range of potential applications in micro- and nano-scale smart devices; however, their performance tends to be greatly degraded when reduced to a thin film due to the large clamping force by the substrate and surrounding materials. Herein, we report an effective method for synthesizing isolated piezoelectric nano-materials as means to relax the clamping force and recover original piezoelectric properties of the materials. Using this, environmentally friendly single-crystalline NaxK1-xNbO3 (NKN) piezoelectric nano-rod arrays were successfully synthesized by conventional pulsed-laser deposition and demonstrated to have a remarkably enhanced piezoelectric performance. The shape of the nano-structure was also found to be easily manipulated by varying the energy conditions of the physical vapor. We anticipate that this work will provide a way to produce piezoelectric micro- and nano-devices suitable for practical application, and in doing so, open a new path for the development of complex metal-oxide nano-structures.
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Affiliation(s)
- Min-Gyu Kang
- 1] Electronic Materials Research Center, Korea Institute of Science and Technology, 39-1, Hawolgok-dong, Seongbuk gu, Seoul, 136-791, Republic of Korea [2] Department of Materials Science and Engineering, Korea University, 145, Anam-ro, Sungbuk gu, Seoul 136-701, Republic of Korea
| | - Seung-Min Oh
- Electronic Materials Research Center, Korea Institute of Science and Technology, 39-1, Hawolgok-dong, Seongbuk gu, Seoul, 136-791, Republic of Korea
| | - Woo-Suk Jung
- Electronic Materials Research Center, Korea Institute of Science and Technology, 39-1, Hawolgok-dong, Seongbuk gu, Seoul, 136-791, Republic of Korea
| | - Hi Gyu Moon
- Electronic Materials Research Center, Korea Institute of Science and Technology, 39-1, Hawolgok-dong, Seongbuk gu, Seoul, 136-791, Republic of Korea
| | - Seung-Hyub Baek
- Electronic Materials Research Center, Korea Institute of Science and Technology, 39-1, Hawolgok-dong, Seongbuk gu, Seoul, 136-791, Republic of Korea
| | - Sahn Nahm
- Department of Materials Science and Engineering, Korea University, 145, Anam-ro, Sungbuk gu, Seoul 136-701, Republic of Korea
| | - Seok-Jin Yoon
- Electronic Materials Research Center, Korea Institute of Science and Technology, 39-1, Hawolgok-dong, Seongbuk gu, Seoul, 136-791, Republic of Korea
| | - Chong-Yun Kang
- 1] Electronic Materials Research Center, Korea Institute of Science and Technology, 39-1, Hawolgok-dong, Seongbuk gu, Seoul, 136-791, Republic of Korea [2] KU-KIST Graduate School of Converging Science and Technology, Korea University, 145, Anam-ro, Seongbuk gu, Seoul, 136-701, Republic of Korea
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14
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Jung WS, Kang MG, Moon HG, Baek SH, Yoon SJ, Wang ZL, Kim SW, Kang CY. High output piezo/triboelectric hybrid generator. Sci Rep 2015; 5:9309. [PMID: 25791299 PMCID: PMC4366849 DOI: 10.1038/srep09309] [Citation(s) in RCA: 184] [Impact Index Per Article: 20.4] [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: 09/29/2014] [Accepted: 01/30/2015] [Indexed: 12/23/2022] Open
Abstract
Recently, piezoelectric and triboelectric energy harvesting devices have been developed to convert mechanical energy into electrical energy. Especially, it is well known that triboelectric nanogenerators have a simple structure and a high output voltage. However, whereas nanostructures improve the output of triboelectric generators, its fabrication process is still complicated and unfavorable in term of the large scale and long-time durability of the device. Here, we demonstrate a hybrid generator which does not use nanostructure but generates much higher output power by a small mechanical force and integrates piezoelectric generator into triboelectric generator, derived from the simultaneous use of piezoelectric and triboelectric mechanisms in one press-and-release cycle. This hybrid generator combines high piezoelectric output current and triboelectric output voltage, which produces peak output voltage of ~370 V, current density of ~12 μA·cm−2, and average power density of ~4.44 mW·cm−2. The output power successfully lit up 600 LED bulbs by the application of a 0.2 N mechanical force and it charged a 10 μF capacitor to 10 V in 25 s. Beyond energy harvesting, this work will provide new opportunities for developing a small, built-in power source in self-powered electronics such as mobile electronics.
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Affiliation(s)
- Woo-Suk Jung
- Electronic Materials Research Center, Korea Institute of Science and Technology (KIST), Seoul 136-791, Korea
| | - Min-Gyu Kang
- Electronic Materials Research Center, Korea Institute of Science and Technology (KIST), Seoul 136-791, Korea
| | - Hi Gyu Moon
- Electronic Materials Research Center, Korea Institute of Science and Technology (KIST), Seoul 136-791, Korea
| | - Seung-Hyub Baek
- 1] Electronic Materials Research Center, Korea Institute of Science and Technology (KIST), Seoul 136-791, Korea [2] Department of Nanomaterials Science and Technology, University of Science and Technology (UST), Daejeon, 305-333, Korea
| | - Seok-Jin Yoon
- Electronic Materials Research Center, Korea Institute of Science and Technology (KIST), Seoul 136-791, Korea
| | - Zhong-Lin Wang
- School of Material Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245, United States
| | - Sang-Woo Kim
- School of Advanced Materials Science and Engineering, SKKU Advanced Institute of Nanotechnology (SAINT), Center for Human Interface Nanotechnology (HINT), Sungkyunkwan University, Suwon 440-746, Korea
| | - Chong-Yun Kang
- 1] Electronic Materials Research Center, Korea Institute of Science and Technology (KIST), Seoul 136-791, Korea [2] KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 136-701, Korea
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15
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Moon HG, Choi YR, Shim YS, Choi KI, Lee JH, Kim JS, Yoon SJ, Park HH, Kang CY, Jang HW. Extremely sensitive and selective NO probe based on villi-like WO3 nanostructures for application to exhaled breath analyzers. ACS Appl Mater Interfaces 2013; 5:10591-6. [PMID: 24090094 DOI: 10.1021/am402456s] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Self-assembled WO3 thin film nanostructures with 1-dimensional villi-like nanofingers (VLNF) have been synthesized on the SiO2/Si substrate with Pt interdigitated electrodes using glancing angle deposition (GAD). Room-temperature deposition of WO3 by GAD resulted in anisotropic nanostructures with large aspect ratio and porosity having a relative surface area, which is about 32 times larger than that of a plain WO3 film. A WO3 VLNF sensor shows extremely high response to nitric oxide (NO) at 200 °C in 80% of relative humidity atmosphere, while responses of the sensor to ethanol, acetone, ammonia, and carbon monoxide are negligible. Such high sensitivity and selectivity to NO are attributed to the highly efficient modualtion of potential barriers at narrow necks between individual WO3 VLNF and the intrinsically high sensitivity of WO3 to NO. The theoretical detection limit of the sensor for NO is expected to be as low as 88 parts per trillion (ppt). Since NO is an approved biomarker of chronic airway inflammation in asthma, unprecedentedly high response and selectivity, and ppt-level detection limit to NO under highly humid environment demonstrate the great potential of the WO3 VLNF for use in high performance breath analyzers.
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Affiliation(s)
- Hi Gyu Moon
- Electronic Materials Research Center, Korea Institute of Science and Technology , Seoul 136-791, Republic of Korea
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16
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Moon HG, Han W, Kim JY, Kim SJ, Yoon JH, Oh SJ, Yu JH, Noh DY. Effect of multiple invasive foci on breast cancer outcomes according to the molecular subtypes: a report from the Korean Breast Cancer Society. Ann Oncol 2013; 24:2298-304. [PMID: 23704201 DOI: 10.1093/annonc/mdt187] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND In this study, the prognostic impact of the presence of the multifocal or multicentric tumor (MMT) and its association with molecular subtypes were investigated. PATIENTS AND METHODS We investigated the breast cancer metastasis and survival in patients with multifocal or multicentric invasive foci in the same breast. The study population includes 2882 patients in the Seoul National University Hospital Breast Care Center (SNUHBCC) dataset and 41 179 patients in Korean Breast Cancer Registry (KBCR) dataset. RESULTS From SNUHBCC dataset, we observed a significant role of MMT in developing distant metastasis and death when the tumors were triple-negative subtype. This subtype-specific prognostic importance of MMT in overall survival was also seen in KBCR dataset (HR, 1.32; 95% CI, 1.02-1.69). In tumors <2 cm, the hazard ratios (HRs) for node metastasis and death were similar along the tumor size change in triple-negative subtype, while other subtypes showed a stepwise increment, suggesting the biologic importance of small invasive foci in this subtype. CONCLUSIONS Our results demonstrate the prognostic importance of MMT in patients with triple-negative breast cancers. Small additional invasive foci in triple-negative breast cancer patients should be considered as clinically relevant tumor deposits.
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Affiliation(s)
- H G Moon
- Department of Surgery and Cancer Research Institute, Seoul National University College of Medicine, Seoul
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Gwon HJ, Moon HG, Jang HW, Yoon SJ, Yoo KS. Sensitivity enhancement of nanostructured SnO2 gas sensors fabricated using the glancing angle deposition method. J Nanosci Nanotechnol 2013; 13:2740-2744. [PMID: 23763153 DOI: 10.1166/jnn.2013.7352] [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] [Indexed: 06/02/2023]
Abstract
0.5 wt.% Pd-catalyzed SnO2 thin-film gas sensors with microstructures controlled on a nanometer scale were fabricated by an e-beam evaporator using the glancing angle deposition (GAD) method. After annealing at 500 degrees C for 1 h, the sensors produced were polycrystalline with a nanoporous, tilted columnar microstructure. The gas-sensing properties of these SnO2 sensors were measured in the concentration range of 1 to 5 ppm NO2 at 250 degrees C and of 10 to 50 ppm C2H5OH at 400 degrees C, respectively. The sensors fabricated by e-beam evaporation in combination with the GAD method showed much higher sensitivities than normally prepared sensors and exhibited rapid response times. The gas sensitivity (S = R(gas)/R(air)) of the SnO2 sensor using the GAD method was 43.4 for 5 ppm NO2 and 0.08 for 10 ppm C2H5OH, respectively. These sensors showed excellent sensitivities compared to the normal thin film sensors (S = 2 for 5 ppm NO2 and 0.92 for 10 ppm C2H5OH). We consider that the nanostructured sensors produced using the GAD process could be used to detect various gases emitted by automobiles and industrial installations.
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Affiliation(s)
- Hyo Jin Gwon
- Department of Materials Science and Engineering, University of Seoul, 90 Jeonnong-dong, Dongdaemun-gu, Seoul 130-743, Korea
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Shim YS, Moon HG, Kim DH, Zhang L, Yoon SJ, Yoon YS, Kang CY, Jang HW. Au-decorated WO3 cross-linked nanodomes for ultrahigh sensitive and selective sensing of NO2 and C2H5OH. RSC Adv 2013. [DOI: 10.1039/c3ra41331d] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Ahn SK, Kim JS, Kim M, Lee JW, Kim T, Kim JY, Moon HG, Han W, Noh DY. Abstract P1-01-08: A Nomogram for predicting two or less axillary lymph node involvement for breast cancer. Cancer Res 2012. [DOI: 10.1158/0008-5472.sabcs12-p1-01-08] [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] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
BACKGROUND: Completion axillary lymph node dissection (ALND) is currently the standard of care in the event of a positive sentinel lymph node biopsy (SLNB). However, result from Z0011 indicate that women with a one or two involved axillary nodes and clinical T1-T2 tumors undergoing lumpectomy with radiation therapy followed by systemic therapy do not benefit from completion of ALND in terms of survival. As a result, the use of intraoperative frozen section during SLNB will be declined.
OBJECTIVE: To define possible predictors of having two or less involved axillary node using preoperative image study to provide information for surgeons making decision about sparing intraoperative frozen section analysis of sentinel lymph node.
METHODS: We reviewed the records of 1214 patients with clinical T1-T2 and clinical node negative invasive breast cancer. None of these patients were in situ cancer on initial gun biopsy nor received neoadjuvant chemotherapy. Factors associated with having three or more involved axillary nodes were evaluated by univariate and multivariate logistic regression analysis.
RESULTS: Among 1214 patients, 203 patients (16.7%) had three or more positive nodes. On a multivariate analysis, having three or more positive nodes was associated with primary tumor size by breast US, axillary LN grade according to cortical thickness by US and presence of axillary LN enlargement on chest CT. The area under ROC curve corresponding to the multivariate logistic regression model applied to dataset of 1214 patients was 0.827 (95% CI: 0.793–0.860). When applied to a validation dataset of 378 patients, it was 0.899 (95% CI: 0.841–0.957). A nomogram to predict the probability of having two or less axillary nodes involvement based on patients' age and preoperative image findings was developed from the multivariate logistic regression model.
CONCLUSION: Patients with a low probability of having three or more positive nodes can be identified from preoperative image finding. The nomogram developed will be helpful to surgeons making decision about sparing intraoperative frozen section analysis of sentinel lymph.
Citation Information: Cancer Res 2012;72(24 Suppl):Abstract nr P1-01-08.
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Affiliation(s)
- SK Ahn
- Seoul National University College of Medicine, Seoul, Korea
| | - JS Kim
- Seoul National University College of Medicine, Seoul, Korea
| | - Mk Kim
- Seoul National University College of Medicine, Seoul, Korea
| | - JW Lee
- Seoul National University College of Medicine, Seoul, Korea
| | - T Kim
- Seoul National University College of Medicine, Seoul, Korea
| | - JY Kim
- Seoul National University College of Medicine, Seoul, Korea
| | - HG Moon
- Seoul National University College of Medicine, Seoul, Korea
| | - W Han
- Seoul National University College of Medicine, Seoul, Korea
| | - D-Y Noh
- Seoul National University College of Medicine, Seoul, Korea
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Moon HG, Shim YS, Kim DH, Jeong HY, Jeong M, Jung JY, Han SM, Kim JK, Kim JS, Park HH, Lee JH, Tuller HL, Yoon SJ, Jang HW. Self-activated ultrahigh chemosensitivity of oxide thin film nanostructures for transparent sensors. Sci Rep 2012; 2:588. [PMID: 22905319 PMCID: PMC3421433 DOI: 10.1038/srep00588] [Citation(s) in RCA: 46] [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: 05/18/2012] [Accepted: 08/02/2012] [Indexed: 11/30/2022] Open
Abstract
One of the top design priorities for semiconductor chemical sensors is developing simple, low-cost, sensitive and reliable sensors to be built in handheld devices. However, the need to implement heating elements in sensor devices, and the resulting high power consumption, remains a major obstacle for the realization of miniaturized and integrated chemoresistive thin film sensors based on metal oxides. Here we demonstrate structurally simple but extremely efficient all oxide chemoresistive sensors with ~90% transmittance at visible wavelengths. Highly effective self-activation in anisotropically self-assembled nanocolumnar tungsten oxide thin films on glass substrate with indium-tin oxide electrodes enables ultrahigh response to nitrogen dioxide and volatile organic compounds with detection limits down to parts per trillion levels and power consumption less than 0.2 microwatts. Beyond the sensing performance, high transparency at visible wavelengths creates opportunities for their use in transparent electronic circuitry and optoelectronic devices with avenues for further functional convergence.
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Affiliation(s)
- Hi Gyu Moon
- Electronic Materials Research Center, Korea Institute of Science and Technology, Seoul 136-791, Republic of Korea
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Moon HG, Shim YS, Kim DH, Jang HW, Han SH, Park HH, Yoon SJ. Highly ordered large-area colloid templates for nanostructured TiO2 thin film gas sensors. J Nanosci Nanotechnol 2012; 12:3496-3500. [PMID: 22849154 DOI: 10.1166/jnn.2012.5589] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
We report a novel process that uses highly ordered colloidal templating to fabricate nanostructured TiO2 thin film gas sensors. An O2 plasma treatment is used to decrease the contact angle of a water droplet on a SiO2/Si substrate from 46 degrees to 3 degrees. The formation of this hydrophilic surface enhances the adhesion of polystyrene microspheres to the substrate during the spin coating of the colloidal solution, leading to a large-area colloid template of closely packed monolayer microspheres on the substrates. Embossed TiO2 thin film gas sensors fabricated through highly ordered colloidal templating using O2 plasma exhibit substantially enhanced gas sensing performance as compared to those without surface treatments prior to colloidal templating.
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Affiliation(s)
- Hi Gyu Moon
- Electronic Materials Center, Korea Institute of Science and Technology (KIST), Seoul 136-791, Korea
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Ahn SK, Moon HG, Shin HC, Kim HS, Yom CK, Han W, Noh DY. Abstract P4-09-15: Preoperative TPS as Valuable Prognostic Marker for Breast Cancer. Cancer Res 2010. [DOI: 10.1158/0008-5472.sabcs10-p4-09-15] [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] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
BACKGROUND: Several serum markers are used in management of breast cancer patients. Among these, tissue polypeptide specific antigen (TPS) has been recently proposed as a potential new marker for breast cancer.
METHODS: We reviewed the records of 2247 patents with breast cancer treated between November 2000 and December 2007. We evaluated the association between clinicopathologic features and recurrence free survival with preoperative TPS.
RESULTS: Among 2271 breast cancer patients, elevated preoperative TPS level (TPS>80 U/L) were identified in 479 patients (21.1%). Age (>45), tumor size (>2cm), tumor stage, nodal metastasis, progesterone receptor, Ki-67, recurrence and visceral metastasis were associated with elevated TPS levels. 193 patients had evidence of relapse. Elevated TPS were associated with poor recurrence free survival. (P<0.001) On a multivariate analysis with using the Cox model, nodal metastasis, estrogen receptor, Ki-67, histologic grade and elevated TPS(p=0.053) were independent prognostic factors for recurrence free survival.
CONCLUSION: Elevated preoperative TPS levels are associated with poor breast cancer outcome. Preoperative TPS can be a valuable prognostic marker for breast cancer.
Figure available in online version.
Citation Information: Cancer Res 2010;70(24 Suppl):Abstract nr P4-09-15.
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Affiliation(s)
- SK Ahn
- Seoul National University College of Medicine, Korea
| | - HG Moon
- Seoul National University College of Medicine, Korea
| | - HC Shin
- Seoul National University College of Medicine, Korea
| | - HS Kim
- Seoul National University College of Medicine, Korea
| | - CK Yom
- Seoul National University College of Medicine, Korea
| | - W Han
- Seoul National University College of Medicine, Korea
| | - D-Y. Noh
- Seoul National University College of Medicine, Korea
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Ha JH, Jin DQ, Shin SM, Moon HG, Lee ES, Park YH. Effects of angiotensin II on the renal antioxidant activities of borderline hypertensive rats. Kidney Blood Press Res 2002; 24:185-91. [PMID: 11528211 DOI: 10.1159/000054226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 11/19/2022] Open
Abstract
This study was aimed to study the angiotensin II (Ang II)-induced antioxidant changes in the kidney of borderline-hypertensive rats (BHR). We measured renal antioxidant enzyme activities, and glutathione (GSH) contents and lipid peroxide levels in relation to the age of subjects. In the antioxidant enzyme assays, consistent changes were not observed in relation to age. However, in the assay for reduced GSH, nonenzymatic antioxidant, contents of adult and aged rats were much greater than those of weanling rats. Subcutaneous injection of pressor dose of human Ang II (200 microg/kg over 90 min) significantly reduced enzymatic activities in the weanling (4-week-aged) and adult (10-week-aged) BHR. However, in the relatively aged (16-week-aged) rats, Ang II did not alter enzymatic activities. Renal GSH contents of aged BHR, were highly increased by Ang II. Renal lipid peroxide levels of weanling and adult BHR were increased by Ang II, but decreased in the aged rats. However, these characteristic changes of renal antioxidant due to Ang II of the BHR could not be observed in the age-matched control, Wistar-Kyoto rats (WKR). From these results, it can be concluded that impacts of oxidative stress on the kidney of BHR may be greater in the young rats.
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Affiliation(s)
- J H Ha
- Department of Pharmacology, Yeungnam University, Kyungsan, Republic of Korea
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