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Kim S, Oh YS, Lee K, Kim S, Maeng WY, Kim KS, Kim GB, Cho S, Han H, Park H, Wang M, Avila R, Xie Z, Ko K, Choi J, Je M, Lee H, Lee S, Koo J, Park I. Battery-Free, Wireless, Cuff-Type, Multimodal Physical Sensor for Continuous Temperature and Strain Monitoring of Nerve. Small 2023; 19:e2206839. [PMID: 37069777 DOI: 10.1002/smll.202206839] [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: 11/05/2022] [Revised: 02/22/2023] [Indexed: 06/19/2023]
Abstract
Peripheral nerve injuries cause various disabilities related to loss of motor and sensory functions. The treatment of these injuries typically requires surgical operations for improving functional recovery of the nerve. However, capabilities for continuous nerve monitoring remain a challenge. Herein, a battery-free, wireless, cuff-type, implantable, multimodal physical sensing platform for continuous in vivo monitoring of temperature and strain from the injured nerve is introduced. The thin, soft temperature, and strain sensors wrapped around the nerve exhibit good sensitivity, excellent stability, high linearity, and minimum hysteresis in relevant ranges. In particular, the strain sensor integrated with circuits for temperature compensation provides reliable, accurate strain monitoring with negligible temperature dependence. The system enables power harvesting and data communication to wireless, multiple implanted devices wrapped around the nerve. Experimental evaluations, verified by numerical simulations, with animal tests, demonstrate the feasibility and stability of the sensor system, which has great potential for continuous in vivo nerve monitoring from an early stage to complete regeneration.
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Affiliation(s)
- Seunghwan Kim
- Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, Daejeon, 34141, Republic of Korea
| | - Yong Suk Oh
- Department of Mechanical Engineering, Changwon National University, Changwon, 51140, Republic of Korea
| | - Kwanghyoung Lee
- Department of Thoracic and Cardiovascular Surgery, Korea University College of Medicine, Seoul, 02841, Republic of Korea
| | - Seongchan Kim
- Center for Biomaterials, Korea Institute of Science and Technology, Seoul, 02841, Republic of Korea
| | - Woo-Youl Maeng
- School of Biomedical Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Kyung Su Kim
- School of Biomedical Engineering, Korea University, Seoul, 02841, Republic of Korea
- Interdisciplinary Program in Precision Public Health, Korea University, Seoul, 02841, Republic of Korea
| | - Ga-Been Kim
- Center for Biomaterials, Korea Institute of Science and Technology, Seoul, 02841, Republic of Korea
- School of Biomedical Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Seokjoo Cho
- Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, Daejeon, 34141, Republic of Korea
| | - Hyeonseok Han
- Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, Daejeon, 34141, Republic of Korea
| | - Hyunwoo Park
- School of Electrical Engineering, Korea Advanced Institute of Science and Technology, Daejeon, 34141, Republic of Korea
| | - Mengqiu Wang
- State Key Laboratory of Structural Analysis for Industrial Equipment, Department of Engineering Mechanics, Dalian University of Technology, Dalian, 116023, P. R. China
- Ningbo Institute of Dalian University of Technology, Ningbo, 315016, P. R. China
| | - Raudel Avila
- Department of Mechanical Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Zhaoqian Xie
- State Key Laboratory of Structural Analysis for Industrial Equipment, Department of Engineering Mechanics, Dalian University of Technology, Dalian, 116023, P. R. China
- Ningbo Institute of Dalian University of Technology, Ningbo, 315016, P. R. China
- DUT-BSU Joint Institute, Dalian University of Technology, Dalian, 116023, P. R. China
| | - Kabseok Ko
- Qualcomm Institute, La Jolla, CA, 92093, USA
- Department of Electronics Engineering, Kangwon National University, Chuncheon, 24341, Republic of Korea
| | - Jungrak Choi
- Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, Daejeon, 34141, Republic of Korea
| | - Minkyu Je
- School of Electrical Engineering, Korea Advanced Institute of Science and Technology, Daejeon, 34141, Republic of Korea
| | - Hyojin Lee
- Center for Biomaterials, Korea Institute of Science and Technology, Seoul, 02841, Republic of Korea
| | - Sungho Lee
- Department of Thoracic and Cardiovascular Surgery, Korea University College of Medicine, Seoul, 02841, Republic of Korea
| | - Jahyun Koo
- School of Biomedical Engineering, Korea University, Seoul, 02841, Republic of Korea
- Interdisciplinary Program in Precision Public Health, Korea University, Seoul, 02841, Republic of Korea
| | - Inkyu Park
- Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, Daejeon, 34141, Republic of Korea
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Friedrich S, Kim GB, Bray C, Cantor R, Dilling J, Fretwell S, Hall JA, Lennarz A, Lordi V, Machule P, McKeen D, Mougeot X, Ponce F, Ruiz C, Samanta A, Warburton WK, Leach KG. Limits on the Existence of sub-MeV Sterile Neutrinos from the Decay of ^{7}Be in Superconducting Quantum Sensors. Phys Rev Lett 2021; 126:021803. [PMID: 33512206 DOI: 10.1103/physrevlett.126.021803] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Accepted: 12/15/2020] [Indexed: 06/12/2023]
Abstract
Sterile neutrinos are natural extensions to the standard model of particle physics and provide a possible portal to the dark sector. We report a new search for the existence of sub-MeV sterile neutrinos using the decay-momentum reconstruction technique in the decay of ^{7}Be. The experiment measures the total energy of the ^{7}Li daughter atom from the electron capture decay of ^{7}Be implanted into sensitive superconducting tunnel junction (STJ) quantum sensors. This first experiment presents data from a single STJ operated at a low count rate for a net total of 28 days, and provides exclusion limits on sterile neutrinos in the mass range from 100 to 850 keV that improve upon previous work by up to an order of magnitude.
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Affiliation(s)
- S Friedrich
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - G B Kim
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - C Bray
- Department of Physics, Colorado School of Mines, Golden, Colorado 80401, USA
| | - R Cantor
- STAR Cryoelectronics LLC, Santa Fe, New Mexico 87508, USA
| | - J Dilling
- TRIUMF, Vancouver, British Columbia V6T 2A3, Canada
| | - S Fretwell
- Department of Physics, Colorado School of Mines, Golden, Colorado 80401, USA
| | - J A Hall
- STAR Cryoelectronics LLC, Santa Fe, New Mexico 87508, USA
| | - A Lennarz
- TRIUMF, Vancouver, British Columbia V6T 2A3, Canada
- Department of Physics and Astronomy, McMaster University, Hamilton, Ontario L8S 4M1, Canada
| | - V Lordi
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - P Machule
- TRIUMF, Vancouver, British Columbia V6T 2A3, Canada
| | - D McKeen
- TRIUMF, Vancouver, British Columbia V6T 2A3, Canada
| | - X Mougeot
- Université Paris-Saclay, CEA, List, Laboratoire National Henri Becquerel (LNE-LNHB), F-91120 Palaiseau, France
| | - F Ponce
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
- Department of Physics, Stanford University, Stanford, California 94305, USA
| | - C Ruiz
- TRIUMF, Vancouver, British Columbia V6T 2A3, Canada
| | - A Samanta
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | | | - K G Leach
- Department of Physics, Colorado School of Mines, Golden, Colorado 80401, USA
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Fretwell S, Leach KG, Bray C, Kim GB, Dilling J, Lennarz A, Mougeot X, Ponce F, Ruiz C, Stackhouse J, Friedrich S. Direct Measurement of the ^{7}Be L/K Capture Ratio in Ta-Based Superconducting Tunnel Junctions. Phys Rev Lett 2020; 125:032701. [PMID: 32745397 DOI: 10.1103/physrevlett.125.032701] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Revised: 05/19/2020] [Accepted: 06/25/2020] [Indexed: 06/11/2023]
Abstract
We report a high-statistics measurement of the L/K orbital electron capture ratio in ^{7}Be embedded in cryogenic Ta. The thin Ta film formed part of a high-resolution superconducting tunnel junction radiation detector that was used to identify the signals from different decay channels. The measured L/K capture ratio of 0.070(7) is significantly larger than the only previous measurement of this quantity and the theoretical predictions that include in-medium effects. This value is a uniquely sensitive probe of the 1s and 2s orbital overlaps with the nucleus and is of relevance to nuclear and atomic physics, as well as Li production in novae and other astrophysical scenarios. This is the first experiment that uses superconducting tunnel junctions for nuclear-recoil detection, opening a new experimental avenue for low-energy precision measurements with rare isotopes.
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Affiliation(s)
- S Fretwell
- Department of Physics, Colorado School of Mines, Golden, Colorado 80401, USA
| | - K G Leach
- Department of Physics, Colorado School of Mines, Golden, Colorado 80401, USA
| | - C Bray
- Department of Physics, Colorado School of Mines, Golden, Colorado 80401, USA
| | - G B Kim
- Nuclear and Chemical Sciences Division, Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - J Dilling
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
| | - A Lennarz
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
| | - X Mougeot
- CEA, LIST, Laboratoire National Henri Becquerel, CEA-Saclay, 91191 Gif-sur-Yvette Cedex, France
| | - F Ponce
- Nuclear and Chemical Sciences Division, Lawrence Livermore National Laboratory, Livermore, California 94550, USA
- Department of Physics, Stanford University, Stanford, California 94305, USA
| | - C Ruiz
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
| | - J Stackhouse
- Department of Physics, Colorado School of Mines, Golden, Colorado 80401, USA
| | - S Friedrich
- Nuclear and Chemical Sciences Division, Lawrence Livermore National Laboratory, Livermore, California 94550, USA
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Adam GO, Lee HR, Lee SJ, Kim SJ, Kim GB, Kang HS. Effects of acute lipopolysaccharide-induced toxemia model on some neglected blood parameters. Pol J Vet Sci 2019; 21:665-671. [PMID: 30605278 DOI: 10.24425/124304] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
The presence of lipopolysaccharide (LPS) in blood induces an inflammatory response which leads to multiple organ dysfunction and numerous metabolic disorders. Uncontrolled, improper or late intervention may lead to tissue hypoxia, anaerobic glycolysis and a disturbance in the acid -base balance. The effects of LPS-induced toxemia on biological and immunological markers were well studied. However, parameters such as base excess, ions, and acid-base balance were not fully investigated. Therefore, the objective of this study was to examine these blood parameters collectively in LPS-induced inflammatory toxemia in rat's model. After induction of toxemia by injecting LPS at a rate of 5 mg/kg body weight intravenously, blood was collected from the tail vein of twenty rats and immediately analyzed. After 24 hours, the animals were sacrificed and the blood was collected from the caudal vena cava. The results revealed that the levels of pH, bicar- bonate, partial pressure of oxygen, oxygen saturation, Alveolar oxygen, hemoglobin, hematocrit, magnesium (Mg2+), and calcium (Ca2+) were significantly decreased. On the other side, the levels of Base excess blood, Base excess extracellular fluid, partial pressure of carbon dioxide, lactate, Ca2+/Mg2+, potassium, and chloride were significantly increased compared to those found pre toxemia induction. However, sodium level showed no significant change. In conclusion, Acute LPS-toxemia model disturbs acid-base balance, blood gases, and ions. These parameters can be used to monitor human and animal toxemic inflammatory response induced by bacterial LPS conditions to assist in the management of the diagnosed cases.
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Affiliation(s)
- G O Adam
- Department of Pharmacology, College of Veterinary Medicine, Chonbuk National University, Iksan Campus, 79 Gobong-ro, Iksan-si, Jeollabuk-do 54596 Republic of Korea.,Department of Veterinary Medicine and Surgery, College of Veterinary Medicine, Sudan University of Science and Technology, P.O. Box No. 204, Hilat Kuku, Khartoum, Sudan
| | - H R Lee
- Department of Pharmacology, College of Veterinary Medicine, Chonbuk National University, Iksan Campus, 79 Gobong-ro, Iksan-si, Jeollabuk-do 54596 Republic of Korea
| | - S J Lee
- Korea Basic Science Institute Jeonju Center, Deokjingu, Jeonjusi, Jeollabukdo 54896, Republic of Korea
| | - S J Kim
- Department of Pharmacology, College of Veterinary Medicine, Chonbuk National University, Iksan Campus, 79 Gobong-ro, Iksan-si, Jeollabuk-do 54596 Republic of Korea
| | - G B Kim
- Department of Pharmacology, College of Veterinary Medicine, Chonbuk National University, Iksan Campus, 79 Gobong-ro, Iksan-si, Jeollabuk-do 54596 Republic of Korea
| | - H S Kang
- Department of Pharmacology, College of Veterinary Medicine, Chonbuk National University, Iksan Campus, 79 Gobong-ro, Iksan-si, Jeollabuk-do 54596 Republic of Korea
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Abstract
Bacterial communities in the different regions of gastrointestinal tract (GIT) of broiler chickens were analyzed by pyrosequencing approach to understand microbial composition and diversity. The DNA samples extracted from 7 different regions along the GIT were subjected to bacterial-community analysis by pyrosequencing of the V1-V3 region of 16S rRNA gene. Major bacterial phyla in the chicken-gut microbiota included Firmicutes, Proteobacteria, Bacteroidetes, Actinobacteria, and Acidobacteria, but Firmicutes were mostly dominant (67.3 ± 16.1% of the total sequence reads identified). Among Firmicutes, Lactobacillales, including the genera Lactobacillus and Enterococcus, were the most dominant (51.8 ± 34.5% of the total sequence reads identified) from the crop to ileum. In contrast, in the cecum and large intestine, those genera were rarely detected, and Clostridiales were dominant (55.9 ± 31.4%). Fast UniFrac analysis showed that microbial communities from the crop to jejunum of the same individual chicken were grouped together, and those from ileum, cecum, and large intestine were clustered in a more GIT-specific manner. The numbers of shared operational taxonomic units between the neighboring segments of GIT were low, ranging from 2.9 to 20.3%. However, the abundance of shared operational taxonomic units in each segment was relatively high, ranging from 61.7 to 85.0%, suggesting that substantial proportions of microbial communities were shared between each segment and its neighboring segments, comprising a core microbiota. Our results suggested that the microbial communities of 7 main segments in the chicken GIT were distinctive according to both individuals and the different segments of GIT, but their stability was maintained along the GIT.
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Affiliation(s)
- J H Choi
- Department of Systems Biotechnology, Institute of Microbiomics, and
| | - G B Kim
- Department of Animal Science and Technology, Chung-Ang University, Anseong 456-756, Republic of Korea
| | - C J Cha
- Department of Systems Biotechnology, Institute of Microbiomics, and
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Abstract
We report a very rare case of isolated multiple pulmonary arterial calcification with severe bilateral peripheral pulmonary arterial stenosis diagnosed in utero. Despite treatment with bisphosphonate for 6 months, systolic right ventricular pressure increased persistently and surpassed left ventricular pressure. After successful bilateral pulmonary arterioplasty at 13 months of age, the patient showed decreased systolic right ventricular pressure with normal interventricular septal configuration. This is the first case report for an isolated pulmonary artery calcification without other arterial calcification proven by non-contrast computed tomography of a living patient.
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Affiliation(s)
- S Cha
- Department of Pediatrics, Seoul National University Children's Hospital, Seoul, South Korea
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Jang YS, Kim GB, Kim KJ, Kim MS, Lee HJ, Lee JS, Lee KB, Lee MK, Lee SJ, Ri HC, Yoon WS, Yuryev YN, Kim YH. Development of decay energy spectroscopy using low temperature detectors. Appl Radiat Isot 2012; 70:2255-9. [PMID: 22410296 DOI: 10.1016/j.apradiso.2012.02.109] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2011] [Accepted: 02/22/2012] [Indexed: 10/28/2022]
Abstract
We have developed a high-resolution detection technique for measuring the energy and activity of alpha decay events using low-temperature detectors. A small amount of source material containing alpha-emitting radionuclides was enclosed in a 4π metal absorber. The energy of the alpha particles as well as that of the recoiled nuclides, low-energy electrons, and low-energy x-rays and γ-rays was converted into thermal energy of the gold absorber. A metallic magnetic calorimeter serving as a fast and sensitive thermometer was thermally attached to the metal absorber. In the present report, experimental demonstrations of Q spectroscopy were made with a new meander-type magnetic calorimeter. The thermal connection between the temperature sensor and the absorber was established with annealed gold wires. Each alpha decay event in the absorber resulted in a temperature increase of the absorber and the temperature sensor. Using the spectrum measured for a drop of (226)Ra solution in a 4π gold absorber, all of the alpha emitters in the sample were identified with a demonstration of good detector linearity. The resolution of the (226)Ra spectrum showed a 3.3 keV FWHM at its Q value together with an expected gamma escape peak at the energy shifted by its γ-ray energy.
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Affiliation(s)
- Y S Jang
- Korea Research Institute of Standards and Science (KRISS), Daejeon, South Korea
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Song MS, Kong ES, Kim GB, Kim NC, Kim CH, Kim CK, Kim HK, Roh YJ, Shin KR, Ahn SY, Lee KJ, Lee YW, Chang SO, Chon SJ, Cho NO, Cho MO, Choi KS. Development of Gerontological Nursing Curriculum Model. J Korean Acad Nurs 2003; 33:376-85. [PMID: 15314436 DOI: 10.4040/jkan.2003.33.3.376] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
PURPOSE This study was conducted to develop gerontological curriculum model which reflects the need of Korean society. METHOD Three round Delphi survey method was applied to find consensus of gerontological nursing competencies (knowledge, attitudes and skills) for graduates of nursing schools from the panel of gerontological nursing practice experts. Important concepts in gerontological nursing were delineated from literature review and discussions of gerontological nursing educators. Based on these results the gerontological nursing curriculum model was developed and course structure outlined by the researchers as a group. RESULT As the result of delphi survey, 32 items of knowledge, 29 items of attitude, and 21 items of skill were identified. The curriculum model constructed around a cube with three plane- functional capacity levels, settings, and nursing practice. Specific knowledge, attitudes and skills for gerontological theory and practicum course were suggested. Competency items were assigned to theory and/or practice. CONCLUSION A curriculum model for gerontological nursing has been developed by a group of gerontological nursing educators. The curriculum model should be further tested and developed with detailed theory and practicum course outline and textbooks.
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Affiliation(s)
- M S Song
- College of Nursing, Seoul National University, Chongno-Gu, Korea.
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Abstract
Exposure of grass shrimp (Palaemonetes pugio) embryos to four compounds (anthracene, pyrene, alpha-terthienyl, methylene blue) along with solar exposure resulted in extensive DNA strand damage using the comet assay. DNA tail moments of embryos exposed to these chemicals in the dark ranged from 1.8 to 4.3, while exposure to chemicals and solar resulted in tail moments of 14.3-15.3. Reduction of DNA tail moments when solar exposed embryos were transferred to the dark, suggested DNA repair systems were active. The comet assay can be used to follow both DNA damage and repair following exposure to phototoxic chemicals.
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Affiliation(s)
- R Lee
- Skidaway Institute of Oceanography, University System of Georgia, Savannah 31411, USA.
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Shin KR, Kong ES, Kim GB, Kim NC, Kim CH, Kim CK, Kim HK, Ro YJ, Song MS, Ahn SY, Lee KJ, Lee YW, Chang SO, Chon SJ, Cho NO, Cho MO, Choi KS. Lived Experience with Aging in Middle-Aged Woman. J Korean Acad Nurs 2002. [DOI: 10.4040/jkan.2002.32.6.878] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- K R Shin
- Gerontological Nursing Interest Group, Sigma Theta Tau, Korea
| | - E S Kong
- Gerontological Nursing Interest Group, Sigma Theta Tau, Korea
| | - G B Kim
- Gerontological Nursing Interest Group, Sigma Theta Tau, Korea
| | - N C Kim
- Gerontological Nursing Interest Group, Sigma Theta Tau, Korea
| | - C H Kim
- Gerontological Nursing Interest Group, Sigma Theta Tau, Korea
| | - C K Kim
- Gerontological Nursing Interest Group, Sigma Theta Tau, Korea
| | - H K Kim
- Gerontological Nursing Interest Group, Sigma Theta Tau, Korea
| | - Y J Ro
- Gerontological Nursing Interest Group, Sigma Theta Tau, Korea
| | - M S Song
- Gerontological Nursing Interest Group, Sigma Theta Tau, Korea
| | - S Y Ahn
- Gerontological Nursing Interest Group, Sigma Theta Tau, Korea
| | - K J Lee
- Gerontological Nursing Interest Group, Sigma Theta Tau, Korea
| | - Y W Lee
- Gerontological Nursing Interest Group, Sigma Theta Tau, Korea
| | - S O Chang
- Gerontological Nursing Interest Group, Sigma Theta Tau, Korea
| | - S J Chon
- Gerontological Nursing Interest Group, Sigma Theta Tau, Korea
| | - N O Cho
- Gerontological Nursing Interest Group, Sigma Theta Tau, Korea
| | - M O Cho
- Gerontological Nursing Interest Group, Sigma Theta Tau, Korea
| | - K S Choi
- Gerontological Nursing Interest Group, Sigma Theta Tau, Korea
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Koh CH, Kim GB, Maruya KA, Anderson JW, Jones JM, Kang SG. Induction of the P450 reporter gene system bioassay by polycyclic aromatic hydrocarbons in Ulsan Bay (South Korea) sediments. Environ Pollut 2001; 111:437-445. [PMID: 11202748 DOI: 10.1016/s0269-7491(00)00087-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [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
Polycyclic aromatic hydrocarbons (PAHs) and induction of the P450 reporter gene system (RGS) for 6- and 16-h exposure periods were determined in organic extracts of Ulsan Bay (South Korea) sediments to assess the utility of this bioassay as a screening tool for PAH contamination. The sum of the concentrations of 23 individual PAHs in 30 sediment samples (sigma PAH) based on GC-MS analysis ranged from 0.05 to 6.1 micrograms/g dry wt. P450 RGS fold induction ranged from 4.0 to 320 micrograms/g based on benzo[a]pyrene toxic equivalents (BaPEq). P450 RGS BaPEq and the 'chemical BaPEq', defined as the sum of the products of individual PAH concentrations and pre-determined toxic equivalency factors, exhibited very strong positive correlations with sigma PAH (r2 > 0.90; P < 0.001). Fold induction did not increase (and in some cases decreased) after the optimal incubation period (6 h) for PAHs, indicating that other compounds known to induce the P450 RGS (e.g. chlorinated organics) were not present at levels effecting significant induction. This was supported by GC-ECD analysis where non-ortho and mono-ortho polychlorinated biphenyls (PCBs) known to be strong P450 RGS inducers were found to be at very low or non-detectable levels in samples with the highest P450 RGS responses. The profound difference in PAH profiles for the two most contaminated sites suggested that this assay is especially sensitive for selected PAHs with greater than four rings. Combined with previous results, the P450 RGS shows promise as a useful screening tool for predicting deleterious biological effects resulting from CYP1A1-inducing, sediment-associated chemicals, particularly high molecular weight PAHs.
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Affiliation(s)
- C H Koh
- Department of Oceanography, Seoul National University, Seoul 151-742, South Korea
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Chon SJ, Kong ES, Kim GB, Kim NC, Kim CH, Kim CK, Kim HK, Ro YJ, Shin KR, Song MS, Ahn SY, Lee KJ, Lee YW, Cho NO, Cho MO, Choi KS. A Study of Gerontological Nursing Curriculum. J Korean Acad Nurs 2001. [DOI: 10.4040/jkan.2001.31.5.808] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- S J Chon
- Members of Gerontological Nursing Interest Group, Sigma Theta Tau, Korea
| | - E S Kong
- Members of Gerontological Nursing Interest Group, Sigma Theta Tau, Korea
| | - G B Kim
- Members of Gerontological Nursing Interest Group, Sigma Theta Tau, Korea
| | - N C Kim
- Members of Gerontological Nursing Interest Group, Sigma Theta Tau, Korea
| | - C H Kim
- Members of Gerontological Nursing Interest Group, Sigma Theta Tau, Korea
| | - C K Kim
- Members of Gerontological Nursing Interest Group, Sigma Theta Tau, Korea
| | - H K Kim
- Members of Gerontological Nursing Interest Group, Sigma Theta Tau, Korea
| | - Y J Ro
- Members of Gerontological Nursing Interest Group, Sigma Theta Tau, Korea
| | - K R Shin
- Members of Gerontological Nursing Interest Group, Sigma Theta Tau, Korea
| | - M S Song
- Members of Gerontological Nursing Interest Group, Sigma Theta Tau, Korea
| | - S Y Ahn
- Members of Gerontological Nursing Interest Group, Sigma Theta Tau, Korea
| | - K J Lee
- Members of Gerontological Nursing Interest Group, Sigma Theta Tau, Korea
| | - Y W Lee
- Members of Gerontological Nursing Interest Group, Sigma Theta Tau, Korea
| | - N O Cho
- Members of Gerontological Nursing Interest Group, Sigma Theta Tau, Korea
| | - M O Cho
- Members of Gerontological Nursing Interest Group, Sigma Theta Tau, Korea
| | - K S Choi
- Members of Gerontological Nursing Interest Group, Sigma Theta Tau, Korea
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Choo YM, Kim GB, Choi JY, Park JH, Park JH, Yang CW, Kim YS, Bang BK. Severe respiratory depression by low-dose baclofen in the treatment of chronic hiccups in a patient undergoing CAPD. Nephron Clin Pract 2000; 86:546-7. [PMID: 11124626 DOI: 10.1159/000045866] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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14
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Lee R, Kim GB, Maruya KA, Steinert SA, Oshima Y. DNA strand breaks (comet assay) and embryo development effects in grass shrimp (Palaemonetes pugio) embryos after exposure to genotoxicants. Mar Environ Res 2000; 50:553-557. [PMID: 11460748 DOI: 10.1016/s0141-1136(00)00110-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [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
Grass shrimp embryos develop in egg sacs (stages 1-10) attached to the female for 14-20 days after which they 'hatch' from the egg sacs into a swimming zoea stage (stage 11). Until they emerge from the egg sacs, embryos depend on lipids and lipovitellin stored within the egg. The percent of embryos which hatch after exposure to toxicants relative to controls was the basis of an embryo development assay. Exposure of embryos to chromium(III) chloride, sodium chromate, mercuric chloride, and 2-methyl-1,2-naphthoquinone (MNQ) resulted in a reduced hatching rate. In addition to effects on embryo development, DNA strand damage tests were carried out on contaminant-exposed embryos, using the single-cell electrophoresis method often referred to as comet assay. Development of stage 4 embryos was more affected by MNQ exposure than stage 7 embryos. The hatching rates of stages 4 and 7 embryos exposed to MNQ (172 micrograms/l) were 0 and 90%, respectively. DNA strand damage, measured as DNA tail moments, were 3.4 and 4.4, respectively. Thus, exposure of an early embryo stage to MNQ prevented full embryo development while development of later embryo stages was not affected. It may be that the DNA repair systems are more efficient in later embryo stages than in early stages and thus DNA damaged in the early stages affects development.
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Affiliation(s)
- R Lee
- Skidaway Institute of Oceanography, University System of Georgia, 10 Ocean Science Circle, Savannah, GA 31411, USA.
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Kim GB, Kim YG, Kim SH, Park HG, Jew SS, Lee MG. Pharmacokinetics, skin absorption, stability, blood partition, and protein binding of AS 2-006A, a new wound healing agent. Biopharm Drug Dispos 2000; 21:113-9. [PMID: 11113884 DOI: 10.1002/1099-081x(200004)21:3<113::aid-bdd219>3.0.co;2-o] [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: 11/06/2022]
Abstract
After intravenous administration of AS 2-006A, 20, 50, and 90 mg/kg, to rats, the pharmacokinetic parameters, terminal half-life (69.8-86. 6 min), mean residence time (56.2-75.2 min), apparent volume of distribution at steady state (809-1040 mL/kg), and total body clearance (11.4-11.9 mL/min/kg), were dose-independent. After topical application of 0.5 or 1% AS 2-006A ointment, 300 mg, to abraded rat skin, the absorbed amounts were dose (0.5 and 1%) and time (30, 60, 120, 240, 360 and 480 min)-independent; the value was approximately 20%. The tissue-to-plasma ratios of AS 2-006A were greater than unity in all rat tissues studied, except in the muscle and large intestine. AS 2-006A was stable for up to 24 h incubation in rat plasma, and human plasma and urine; however, it seemed not to be stable in rat urine; the disappearance rate constant was 0.0218/h. AS 2-006A reached equilibrium fast between plasma and blood cells, and the equilibrium plasma/blood cells partition ratios were independent of the initial rabbit blood concentrations of AS 2-006A, 10, 20, and 50 microg/mL; the mean values were in the range of 2.38-2.75 for three rabbit blood. The protein binding of AS 2-006A to rat plasma was high, as the drug was under detection limit in the filtrate at the plasma concentrations of the drug, ranging from 7.21 to 228 microg/mL.
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Affiliation(s)
- G B Kim
- College of Pharmacy, Seoul National University, San 56-1, Shinlim-Dong, Kwanak-Gu, Seoul 151-742, Republic of Korea
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Kim GB, Kim YG, Jew SS, Lee MG. Determination of a new asiatic acid derivative, AS 2-006A in rat plasma and urine, and human plasma by high-performance liquid chromatography. Res Commun Mol Pathol Pharmacol 1999; 104:339-44. [PMID: 10741384] [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] [Subscribe] [Scholar Register] [Indexed: 04/14/2023]
Abstract
A high-performance liquid chromatographic method was developed for the determination of a new wound healing agent, AS 2-006A (ethoxymethyl 2-oxo-3, 23-O-isopropylideneasiatate), in rat plasma and urine, and human plasma. The sample preparation was simple: 2 volumes of acetonitrile were added to the biological samples to deproteinize it. A 50-microl aliquot of the supernatant was injected onto the reversed-phase column. The mobile phase employed was acetonitrile : H2O (9:1, v/v) and run at a flow rate of 1.1 ml/min. The column effluent was monitored by a UV detector set at 205 nm. The retention time for AS 2-006A was approximately 29.5 min. The detection limits for AS 2-006A in rat and human plasma were both 1 microg/ml, and in rat urine was 2 microg/ml. The coefficients of variation of the assay (within-day and between-day) were generally low (below 10.8%) for rat plasma and urine, and human plasma. No interferences from endogenous substances were found.
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Affiliation(s)
- G B Kim
- College of Pharmacy, Seoul National University, South Korea
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Kim GB. [Between science and ideology: the rise and fall of Bong-han theory in 1960's North Korea]. Hanguk Kwahaksa Hakhoeji 1999; 21:194-220. [PMID: 22334962] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
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Cho SG, Park YM, Moon H, Kim KM, Bae SS, Kim GB, Cho HS, Kim CC, Lee KS. Psoriasiform eruption triggered by recombinant granulocyte-macrophage colony stimulating factor (rGM-CSF) and exacerbated by granulocyte colony stimulating factor (rG-CSF) in a patient with breast cancer. J Korean Med Sci 1998; 13:685-8. [PMID: 9886182 PMCID: PMC3054540 DOI: 10.3346/jkms.1998.13.6.685] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Colony-stimulating factors (CSFs) are commonly used for the treatment of neutropenia following chemotherapy and for the mobilization of peripheral blood stem cells (PBSC). We recently experienced a rare case of a new onset of psoriasiform eruption by GM-CSF (granulocyte-macrophage colony-stimulating factor) which was exacerbated by G-CSF (granulocyte colony-stimulating factor) in a patient with breast cancer. A 36-year-old woman had received neoadjuvant chemotherapy (cyclophosphamide, epirubicin and 5-fluorouracil), modified radical mastectomy and adjuvant chemotherapy with paclitaxel and mitoxantrone followed by GM-CSF administration for the treatment of locally advanced breast cancer. She had developed a psoriatic skin lesion on face and both upper arms during leukocyte recovery in spite of no previous history of psoriasis. Next, the chemotherapy course was complicated by a flare of mild psoriatic skin lesion, although CSF was changed into G-CSF due to GM-CSF-associated psoriasis. Subsequently, she had had high-dose chemotherapy and autologous peripheral blood stem cell transplantation for consolidation therapy. GM-CSF was administered for the mobilization of PBSC and post-transplant period, but psoriatic skin lesion did not appear. During 6 months after PBSCT, psoriasiform eruption did not appear.
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Affiliation(s)
- S G Cho
- Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul
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Kim GB, Nakata H, Tanabe S. In vitro inhibition of hepatic cytochrome P450 and enzyme activity by butyltin compounds in marine mammals. Environ Pollut 1998; 99:255-261. [PMID: 15093319 DOI: 10.1016/s0269-7491(97)00121-8] [Citation(s) in RCA: 7] [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] [Received: 11/06/1996] [Accepted: 09/11/1997] [Indexed: 05/24/2023]
Abstract
The present study attempted to examine the in-vitro inhibition of hepatic microsomal P450 content and activity by butyltins in marine mammals and discussed on their possible effects in animals in the wild. Decreases in P450 content and the activities of ethoxyresorufin O-deethylase (EROD, catalyzed by CYPIA subfamily) and penthoxyresorufin O-depentylase (PROD, catalyzed by CYP2B subfamily) by tributyltin (TBT) were observed in in-vitro experiments using hepatic microsomes of a pinniped and a cetacean. Among P450 family, EROD activity is more sensitive to TBT than P450 content and PROD activity, indicating a specific mode of action of TBT on different P450 forms. On the other hand, dibutyltin and monobutyltin have no inhibitory effect on EROD activity at concentrations less than 0.5 mM, indicating that the inhibition of enzyme activity in hepatic microsome of marine mammal is mainly by TBT. TBT concentrations that affect P450 contents and activities are above 10 times higher than the values found in the liver of various marine mammals.
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Affiliation(s)
- G B Kim
- Department of Environment Conservation, Ehime University, Tarumi 3-5-7, Matsuyama, Japan
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Abstract
OBJECTIVE Hypereosinophilic syndrome (eosinophilia without demonstrable cause) commonly involves eosinophilic infiltration of the liver and spleen, but few reports have described the imaging findings. Accordingly, we reviewed the imaging findings in five patients with this syndrome in whom the liver was involved. MATERIALS AND METHODS Five patients who had hypereosinophilic syndrome with hepatic involvement were included in the study. The diagnosis of hepatic involvement was based on pathologic proof in two patients and on imaging and laboratory findings in the other three. Histologic examination of the hepatic lesions showed extensive eosinophilic infiltration in two patients and centrilobular necrosis in one. All patients had chest radiography, barium studies of the gastrointestinal tract, abdominal CT, and sonography. Four patients had hepatosplenic scintigraphy. All patients were followed up for 4-24 months. RESULTS All patients had mild to marked hepatomegaly with multiple focal lesions. Focal lesions were detected on sonograms in three patients, on CT scans in four, and on scintigrams in three. On sonograms, the lesions were usually small (less than 2 cm in diameter), sharply or poorly defined nodules with varied echogenicity scattered throughout the liver. The lesions were hypodense with poorly defined margins on CT scans and appeared as variably sized areas of decreased radionuclide uptake on scintigrams. For each patient, the number, size, and shape of the lesions varied considerably from one imaging study to another. On follow-up studies 2-6 months after treatment, the appearance of the liver was normal. Other radiologic findings included transient pulmonary infiltrates (two patients), mild cardiomegaly (one patient), and mild lymphadenopathy (three patients). CONCLUSION Hypereosinophilic syndrome is a cause of focal hepatic lesions seen on sonograms, CT scans, or scintigrams. The lesions are characterized by the varied appearance on the different types of images and the disappearance of the lesions with treatment.
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Affiliation(s)
- G B Kim
- Department of Radiology, Kyungpook National University College of Medicine, Taegu, Korea
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Levin AN, Kim GB. [Experience in blood bank activities in a pediatric department]. Med Sestra 1974; 33:37-9. [PMID: 4495178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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