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Diware MS, Ganorkar SP, Park K, Chegal W, Cho HM, Cho YJ, Kim YD, Kim H. Dielectric function, critical points, and Rydberg exciton series of WSe 2 monolayer. J Phys Condens Matter 2018; 30:235701. [PMID: 29714172 DOI: 10.1088/1361-648x/aac187] [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: 06/08/2023]
Abstract
The complex dielectric function ([Formula: see text]) of WSe2 monolayer grown by atomic layer deposition is investigated using spectroscopic ellipsometry. Band structure parameters are obtained by standard line-shape analysis of the second-energy-derivative of [Formula: see text] spectra. The fundamental band gap is observed at 2.26 eV, corresponds to transition between valence band (VB) maximum at the K point and conduction band (CB) minimum at Q point in the Brillouin zone (BZ). Two strong so-called A and B excitonic peaks in [Formula: see text] spectra originate from vertical transitions from spin-orbit split (0.43 eV) VB to CB at K point of the BZ. Binding energies of A and B exactions are 0.71 and 0.28 eV, respectively. Well resolved five excited excitons states has been detected within the spectral region between A and B. Energy profile of the Rydberg series shows significant deviation from the hydrogenic behavior, discussed in connection with the 2D hydrogen model. Results presented here will improve our understanding about the optical response of 2D materials and will help to design better optoelectronic applications and validate theoretical considerations.
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Affiliation(s)
- M S Diware
- CeNSCMR and Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea
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Kim E, Rew HJ, Shin TK, Cho HM, Wickramasuriya SS, Yi YJ, Jeong J, Choi I, Heo JM. Standard Body Weight and Serum Estradiol and Progesterone Concentrations in Response to Total Lysine Content in Female Broiler Breeders from 14 to 42 Days after Hatch. Rev Bras Cienc Avic 2018. [DOI: 10.1590/1806-9061-2017-0586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- E Kim
- Chungnam National University, South Korea
| | - HJ Rew
- Chungnam National University, South Korea
| | - TK Shin
- Chonbuk National University, South Korea
| | - HM Cho
- Chungnam National University, South Korea
| | | | - YJ Yi
- Chonbuk National University, South Korea
| | - J Jeong
- Chungnam National University, South Korea
| | - I Choi
- Chungnam National University, South Korea
| | - JM Heo
- Chungnam National University, South Korea
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Kang BS, Cho HS, Lee SY, Choi SI, Oh JE, Cho HM. Performance of an Automated Digital Gamma–Imaging System Based upon Cadmium Telluride-Complementary Metal-Oxide Semiconductor Sensor and Collimated75Se Source for Nondestructive Testing. NUCL SCI ENG 2017. [DOI: 10.13182/nse162-200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- B. S. Kang
- Catholic University of Daegu, Department of Radiological Science, Kyoungsan 712-702, Korea
| | - H. S. Cho
- Yonsei University, Department of Radiological Science, Wonju 220-710, Korea
| | - S. Y. Lee
- Yonsei University, Department of Radiological Science, Wonju 220-710, Korea
| | - S. I. Choi
- Yonsei University, Department of Radiological Science, Wonju 220-710, Korea
| | - J. E. Oh
- Yonsei University, Department of Radiological Science, Wonju 220-710, Korea
| | - H. M. Cho
- Yonsei University, Department of Radiological Science, Wonju 220-710, Korea
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Yoo J, Yi YJ, Wickramasuriya SS, Kim E, Shin TK, Cho HM, Kim N, Heo JM. Evaluation of sulphur amino acid requirement of male Korean native ducklings from hatch to 21 day of age. Br Poult Sci 2017; 58:272-277. [PMID: 28100065 DOI: 10.1080/00071668.2017.1280722] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [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: 10/20/2022]
Abstract
1. A dose-response experiment was conducted with male Korean native ducklings (KND) to evaluate the total sulphur amino acid (TSAA) requirement from hatch to 21 d of age. 2. A completely randomised design with 7 dietary TSAA concentrations (0.62%, 0.65%, 0.68%, 0.71%, 0.74%, 0.77% and 0.80%) were used with 6 replications per treatment. 3. Body weight (BW) and feed intake were measured weekly to calculate average daily gain (ADG), average daily feed intake (ADFI) and feed conversion ratio (FCR). One duckling per pen (n = 6) was killed by cervical dislocation to weigh empty body and drumsticks at the conclusion of experiment. 4. BW was improved significantly with increasing TSAA content, in a non-linear manner. A significant decrease of FCR was shown with increasing TSAA contents. TSAA requirement was determined by taking a mean value after fitting the data to both a linear-plateau and a quadratic-plateau model. Estimated TSAA requirements were 0.70%, 0.70%, 0.66% and 0.70% for the maximum BW, ADG and ADFI and for the minimum FCR, respectively. Increasing TSAA content improved quantity of full body weight (FBW), empty body weight (EBW) and drumstick weight (DSW), but there was no effect on proportion of DSW in relation to EBW and proportion of EBW to FBW. 5. In conclusion, the growth of male KND during 1 to 21 d of age was improved with increasing TSAA content, suggesting optimal TSAA requirements estimated by two analysis models.
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Affiliation(s)
- J Yoo
- a Department of Animal Science and Biotechnology , Chungnam National University , Daejeon 34134 , South Korea
| | - Y J Yi
- b Division of Biotechnology , Chonbuk National University , Iksan 54596 , South Korea
| | - S S Wickramasuriya
- a Department of Animal Science and Biotechnology , Chungnam National University , Daejeon 34134 , South Korea
| | - E Kim
- a Department of Animal Science and Biotechnology , Chungnam National University , Daejeon 34134 , South Korea
| | - T K Shin
- a Department of Animal Science and Biotechnology , Chungnam National University , Daejeon 34134 , South Korea
| | - H M Cho
- a Department of Animal Science and Biotechnology , Chungnam National University , Daejeon 34134 , South Korea
| | - N Kim
- a Department of Animal Science and Biotechnology , Chungnam National University , Daejeon 34134 , South Korea
| | - J M Heo
- a Department of Animal Science and Biotechnology , Chungnam National University , Daejeon 34134 , South Korea
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Shin TK, Cho HM, Wickramasuriya SS, Kim E, Lee SK, Heo JM. Dietary fibre improved ileal morphology without reducing ileal digestibility in weaned pigs housed in an inferior environmental condition. Anim Prod Sci 2017. [DOI: 10.1071/anv57n12ab036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Cho HM, Wickramasuriya SS, Shin TK, Kim E, Lee SK, Heo JM. Dietary cellulose could reduce cytokine responses without compromising growth performance in weaner pigs under a farm-like circumstance. Anim Prod Sci 2017. [DOI: 10.1071/anv57n12ab035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Je UK, Cho HM, Hong DK, Cho HS, Park YO, Park CK, Kim KS, Lim HW, Kim GA, Park SY, Woo TH, Cho SI. 3D reconstruction based on compressed-sensing (CS)-based framework by using a dental panoramic detector. Phys Med 2015; 32:213-7. [PMID: 26494155 DOI: 10.1016/j.ejmp.2015.09.005] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/17/2015] [Revised: 09/22/2015] [Accepted: 09/24/2015] [Indexed: 10/22/2022] Open
Abstract
In this work, we propose a practical method that can combine the two functionalities of dental panoramic and cone-beam CT (CBCT) features in one by using a single panoramic detector. We implemented a CS-based reconstruction algorithm for the proposed method and performed a systematic simulation to demonstrate its viability for 3D dental X-ray imaging. We successfully reconstructed volumetric images of considerably high accuracy by using a panoramic detector having an active area of 198.4 mm × 6.4 mm and evaluated the reconstruction quality as a function of the pitch (p) and the angle step (Δθ). Our simulation results indicate that the CS-based reconstruction almost completely recovered the phantom structures, as in CBCT, for p≤2.0 and θ≤6°, indicating that it seems very promising for accurate image reconstruction even for large-pitch and few-view data. We expect the proposed method to be applicable to developing a cost-effective, volumetric dental X-ray imaging system.
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Affiliation(s)
- U K Je
- Department of Radiation Convergence Engineering, iTOMO Research Group, Yonsei University, Wonju 220-710, Republic of Korea
| | - H M Cho
- Department of Radiation Convergence Engineering, iTOMO Research Group, Yonsei University, Wonju 220-710, Republic of Korea
| | - D K Hong
- Department of Radiation Convergence Engineering, iTOMO Research Group, Yonsei University, Wonju 220-710, Republic of Korea
| | - H S Cho
- Department of Radiation Convergence Engineering, iTOMO Research Group, Yonsei University, Wonju 220-710, Republic of Korea.
| | - Y O Park
- Department of Radiation Convergence Engineering, iTOMO Research Group, Yonsei University, Wonju 220-710, Republic of Korea
| | - C K Park
- Department of Radiation Convergence Engineering, iTOMO Research Group, Yonsei University, Wonju 220-710, Republic of Korea
| | - K S Kim
- Department of Radiation Convergence Engineering, iTOMO Research Group, Yonsei University, Wonju 220-710, Republic of Korea
| | - H W Lim
- Department of Radiation Convergence Engineering, iTOMO Research Group, Yonsei University, Wonju 220-710, Republic of Korea
| | - G A Kim
- Department of Radiation Convergence Engineering, iTOMO Research Group, Yonsei University, Wonju 220-710, Republic of Korea
| | - S Y Park
- Department of Radiation Convergence Engineering, iTOMO Research Group, Yonsei University, Wonju 220-710, Republic of Korea
| | - T H Woo
- Department of Radiation Convergence Engineering, iTOMO Research Group, Yonsei University, Wonju 220-710, Republic of Korea
| | - S I Cho
- Department of Radiation Convergence Engineering, iTOMO Research Group, Yonsei University, Wonju 220-710, Republic of Korea
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Ulvestad A, Singer A, Clark JN, Cho HM, Kim JW, Harder R, Maser J, Meng YS, Shpyrko OG. Topological defect dynamics in operando battery nanoparticles. Science 2015; 348:1344-7. [DOI: 10.1126/science.aaa1313] [Citation(s) in RCA: 264] [Impact Index Per Article: 29.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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Bocquet S, Saro A, Mohr JJ, Aird KA, Ashby MLN, Bautz M, Bayliss M, Bazin G, Benson BA, Bleem LE, Brodwin M, Carlstrom JE, Chang CL, Chiu I, Cho HM, Clocchiatti A, Crawford TM, Crites AT, Desai S, de Haan T, Dietrich JP, Dobbs MA, Foley RJ, Forman WR, Gangkofner D, George EM, Gladders MD, Gonzalez AH, Halverson NW, Hennig C, Hlavacek-Larrondo J, Holder GP, Holzapfel WL, Hrubes JD, Jones C, Keisler R, Knox L, Lee AT, Leitch EM, Liu J, Lueker M, Luong-Van D, Marrone DP, McDonald M, McMahon JJ, Meyer SS, Mocanu L, Murray SS, Padin S, Pryke C, Reichardt CL, Rest A, Ruel J, Ruhl JE, Saliwanchik BR, Sayre JT, Schaffer KK, Shirokoff E, Spieler HG, Stalder B, Stanford SA, Staniszewski Z, Stark AA, Story K, Stubbs CW, Vanderlinde K, Vieira JD, Vikhlinin A, Williamson R, Zahn O, Zenteno A. MASS CALIBRATION AND COSMOLOGICAL ANALYSIS OF THE SPT-SZ GALAXY CLUSTER SAMPLE USING VELOCITY DISPERSION σvAND X-RAYYXMEASUREMENTS. ACTA ACUST UNITED AC 2015. [DOI: 10.1088/0004-637x/799/2/214] [Citation(s) in RCA: 100] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Bleem LE, Stalder B, de Haan T, Aird KA, Allen SW, Applegate DE, Ashby MLN, Bautz M, Bayliss M, Benson BA, Bocquet S, Brodwin M, Carlstrom JE, Chang CL, Chiu I, Cho HM, Clocchiatti A, Crawford TM, Crites AT, Desai S, Dietrich JP, Dobbs MA, Foley RJ, Forman WR, George EM, Gladders MD, Gonzalez AH, Halverson NW, Hennig C, Hoekstra H, Holder GP, Holzapfel WL, Hrubes JD, Jones C, Keisler R, Knox L, Lee AT, Leitch EM, Liu J, Lueker M, Luong-Van D, Mantz A, Marrone DP, McDonald M, McMahon JJ, Meyer SS, Mocanu L, Mohr JJ, Murray SS, Padin S, Pryke C, Reichardt CL, Rest A, Ruel J, Ruhl JE, Saliwanchik BR, Saro A, Sayre JT, Schaffer KK, Schrabback T, Shirokoff E, Song J, Spieler HG, Stanford SA, Staniszewski Z, Stark AA, Story KT, Stubbs CW, Vanderlinde K, Vieira JD, Vikhlinin A, Williamson R, Zahn O, Zenteno A. GALAXY CLUSTERS DISCOVERED VIA THE SUNYAEV-ZEL'DOVICH EFFECT IN THE 2500-SQUARE-DEGREE SPT-SZ SURVEY. ACTA ACUST UNITED AC 2015. [DOI: 10.1088/0067-0049/216/2/27] [Citation(s) in RCA: 410] [Impact Index Per Article: 45.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Saliwanchik BR, Montroy TE, Aird KA, Bayliss M, Benson BA, Bleem LE, Bocquet S, Brodwin M, Carlstrom JE, Chang CL, Cho HM, Clocchiatti A, Crawford TM, Crites AT, de Haan T, Desai S, Dobbs MA, Dudley JP, Foley RJ, Forman WR, George EM, Gladders MD, Gonzalez AH, Halverson NW, Hlavacek-Larrondo J, Holder GP, Holzapfel WL, Hrubes JD, Jones C, Keisler R, Knox L, Lee AT, Leitch EM, Liu J, Lueker M, Luong-Van D, Mantz A, Marrone DP, McDonald M, McMahon JJ, Mehl J, Meyer SS, Mocanu L, Mohr JJ, Murray SS, Nurgaliev D, Padin S, Patej A, Pryke C, Reichardt CL, Rest A, Ruel J, Ruhl JE, Saro A, Sayre JT, Schaffer KK, Shirokoff E, Spieler HG, Stalder B, Stanford SA, Staniszewski Z, Stark AA, Story K, Stubbs CW, Vanderlinde K, Vieira JD, Vikhlinin A, Williamson R, Zahn O, Zenteno A. MEASUREMENT OF GALAXY CLUSTER INTEGRATED COMPTONIZATION AND MASS SCALING RELATIONS WITH THE SOUTH POLE TELESCOPE. ACTA ACUST UNITED AC 2015. [DOI: 10.1088/0004-637x/799/2/137] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Ulvestad A, Clark JN, Singer A, Vine D, Cho HM, Harder R, Meng YS, Shpyrko OG. In situ strain evolution during a disconnection event in a battery nanoparticle. Phys Chem Chem Phys 2015; 17:10551-5. [DOI: 10.1039/c5cp00372e] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Disconnection of active material is a leading cause of battery degradation. X-ray imaging suggests the formation of an interphase layer on a cathode nanoparticle leads to disconnection.
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Affiliation(s)
- Andrew Ulvestad
- Department of Physics
- University of California-San Diego
- La Jolla
- USA
| | - Jesse N. Clark
- Stanford PULSE Institute
- SLAC National Accelerator Laboratory
- Menlo Park
- USA
- Center for Free-Electron Laser Science (CFEL)
| | - Andrej Singer
- Department of Physics
- University of California-San Diego
- La Jolla
- USA
| | - David Vine
- Advanced Photon Source
- Argonne National Laboratory
- Argonne
- USA
| | - H. M. Cho
- Department of NanoEngineering
- University of California-San Diego
- La Jolla
- USA
| | - Ross Harder
- Advanced Photon Source
- Argonne National Laboratory
- Argonne
- USA
| | - Ying Shirley Meng
- Department of NanoEngineering
- University of California-San Diego
- La Jolla
- USA
| | - Oleg G. Shpyrko
- Department of Physics
- University of California-San Diego
- La Jolla
- USA
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Diware MS, Cho HM, Chegal W, Cho YJ, Jo JH, O SW, Paek SH, Yoon YH, Kim D. Solution immersed silicon (SIS)-based biosensors: a new approach in biosensing. Analyst 2015; 140:706-9. [DOI: 10.1039/c4an01584c] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The non-reflecting condition for p-polarized waves is effectively utilized for biomolecular detection through the measurement of thickness change.
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Affiliation(s)
- M. S. Diware
- Center for Nanometrology
- Korea Research Institute of Standards and Science
- Daejeon 305-340
- Republic of Korea
| | - H. M. Cho
- Center for Nanometrology
- Korea Research Institute of Standards and Science
- Daejeon 305-340
- Republic of Korea
| | - W. Chegal
- Center for Nanometrology
- Korea Research Institute of Standards and Science
- Daejeon 305-340
- Republic of Korea
| | - Y. J. Cho
- Center for Nanometrology
- Korea Research Institute of Standards and Science
- Daejeon 305-340
- Republic of Korea
| | - J. H. Jo
- Department of Applied Optics and Electromagnetic
- Hannam University
- Daejeon 306-791
- Republic of Korea
| | - S. W. O
- Department of Bio-Microsystem Technology
- Korea University
- Seoul 136-701
- Republic of Korea
| | - S. H. Paek
- Department of Bio-Microsystem Technology
- Korea University
- Seoul 136-701
- Republic of Korea
| | - Y. H. Yoon
- Division of Mechanical System Engineering
- Chonbuk National University
- Jeonju 561-756
- Republic of Korea
| | - D. Kim
- Division of Mechanical System Engineering
- Chonbuk National University
- Jeonju 561-756
- Republic of Korea
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McDonald M, Benson BA, Vikhlinin A, Aird KA, Allen SW, Bautz M, Bayliss M, Bleem LE, Bocquet S, Brodwin M, Carlstrom JE, Chang CL, Cho HM, Clocchiatti A, Crawford TM, Crites AT, de Haan T, Dobbs MA, Foley RJ, Forman WR, George EM, Gladders MD, Gonzalez AH, Halverson NW, Hlavacek-Larrondo J, Holder GP, Holzapfel WL, Hrubes JD, Jones C, Keisler R, Knox L, Lee AT, Leitch EM, Liu J, Lueker M, Luong-Van D, Mantz A, Marrone DP, McMahon JJ, Meyer SS, Miller ED, Mocanu L, Mohr JJ, Murray SS, Padin S, Pryke C, Reichardt CL, Rest A, Ruhl JE, Saliwanchik BR, Saro A, Sayre JT, Schaffer KK, Shirokoff E, Spieler HG, Stalder B, Stanford SA, Staniszewski Z, Stark AA, Story KT, Stubbs CW, Vanderlinde K, Vieira JD, Williamson R, Zahn O, Zenteno A. THE REDSHIFT EVOLUTION OF THE MEAN TEMPERATURE, PRESSURE, AND ENTROPY PROFILES IN 80 SPT-SELECTED GALAXY CLUSTERS. ACTA ACUST UNITED AC 2014. [DOI: 10.1088/0004-637x/794/1/67] [Citation(s) in RCA: 73] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Ruel J, Bazin G, Bayliss M, Brodwin M, Foley RJ, Stalder B, Aird KA, Armstrong R, Ashby MLN, Bautz M, Benson BA, Bleem LE, Bocquet S, Carlstrom JE, Chang CL, Chapman SC, Cho HM, Clocchiatti A, Crawford TM, Crites AT, de Haan T, Desai S, Dobbs MA, Dudley JP, Forman WR, George EM, Gladders MD, Gonzalez AH, Halverson NW, Harrington NL, High FW, Holder GP, Holzapfel WL, Hrubes JD, Jones C, Joy M, Keisler R, Knox L, Lee AT, Leitch EM, Liu J, Lueker M, Luong-Van D, Mantz A, Marrone DP, McDonald M, McMahon JJ, Mehl J, Meyer SS, Mocanu L, Mohr JJ, Montroy TE, Murray SS, Natoli T, Nurgaliev D, Padin S, Plagge T, Pryke C, Reichardt CL, Rest A, Ruhl JE, Saliwanchik BR, Saro A, Sayre JT, Schaffer KK, Shaw L, Shirokoff E, Song J, Šuhada R, Spieler HG, Stanford SA, Staniszewski Z, Starsk AA, Story K, Stubbs CW, van Engelen A, Vanderlinde K, Vieira JD, Vikhlinin A, Williamson R, Zahn O, Zenteno A. OPTICAL SPECTROSCOPY AND VELOCITY DISPERSIONS OF GALAXY CLUSTERS FROM THE SPT-SZ SURVEY. ACTA ACUST UNITED AC 2014. [DOI: 10.1088/0004-637x/792/1/45] [Citation(s) in RCA: 92] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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McDonald M, Bayliss M, Benson BA, Foley RJ, Ruel J, Sullivan P, Veilleux S, Aird KA, Ashby MLN, Bautz M, Bazin G, Bleem LE, Brodwin M, Carlstrom JE, Chang CL, Cho HM, Clocchiatti A, Crawford TM, Crites AT, de Haan T, Desai S, Dobbs MA, Dudley JP, Egami E, Forman WR, Garmire GP, George EM, Gladders MD, Gonzalez AH, Halverson NW, Harrington NL, High FW, Holder GP, Holzapfel WL, Hoover S, Hrubes JD, Jones C, Joy M, Keisler R, Knox L, Lee AT, Leitch EM, Liu J, Lueker M, Luong-Van D, Mantz A, Marrone DP, McMahon JJ, Mehl J, Meyer SS, Miller ED, Mocanu L, Mohr JJ, Montroy TE, Murray SS, Natoli T, Padin S, Plagge T, Pryke C, Rawle TD, Reichardt CL, Rest A, Rex M, Ruhl JE, Saliwanchik BR, Saro A, Sayre JT, Schaffer KK, Shaw L, Shirokoff E, Simcoe R, Song J, Spieler HG, Stalder B, Staniszewski Z, Stark AA, Story K, Stubbs CW, Šuhada R, van Engelen A, Vanderlinde K, Vieira JD, Vikhlinin A, Williamson R, Zahn O, Zenteno A. A massive, cooling-flow-induced starburst in the core of a luminous cluster of galaxies. Nature 2012; 488:349-52. [DOI: 10.1038/nature11379] [Citation(s) in RCA: 135] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2012] [Accepted: 07/12/2012] [Indexed: 11/09/2022]
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Abstract
Between March 2000 and February 2006, we carried out a prospective study of 100 patients with a low-grade isthmic spondylolisthesis (Meyerding grade II or below), who were randomised to receive a single-level and instrumented posterior lumbar interbody fusion with either one or two cages. The minimum follow-up was for two years. At this stage 91 patients were available for review. A total of 47 patients received one cage (group 1) and 44 two cages (group 2). The clinical and radiological outcomes of the two groups were compared. There were no significant differences between the two groups in terms of post-operative pain, Oswestry Disability Score, clinical results, complication rate, percentage of post-operative slip, anterior fusion rate or posterior fusion rate. On the other hand, the mean operating time was 144 minutes (100 to 240) for patients in group 1 and 167 minutes (110 to 270) for those in group 2 (p = 0.0002). The mean blood loss up to the end of the first post-operative day was 756 ml (510 to 1440) in group 1 and 817 ml (620 to 1730) in group 2 (p < 0.0001). Our results suggest that an instrumented posterior lumbar interbody fusion performed with either one or two cages in addition to a bone graft around the cage has a low rate of complications and a high fusion rate. The clinical outcomes were good in most cases, regardless of whether one or two cages had been used.
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Affiliation(s)
| | - W. W. Park
- Department of Orthopaedic Surgery, Korea Hospital, 1740-16 Daeyeon-Dong, Nam-Gu, Pusan 608-811, Korea
| | - S.-J. Kim
- Department of Nuclear Medicine, Pusan National University, School of Medicine, 1-10 Ami-Dong, Seo-Gu, Pusan 602-739, Korea
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Lee YS, Lee IK, Kang WK, Cho HM, Park JK, Oh ST, Kim JG, Kim YH. Surgical and pathological outcomes of laparoscopic surgery for transverse colon cancer. Int J Colorectal Dis 2008; 23:669-73. [PMID: 18379794 PMCID: PMC2386750 DOI: 10.1007/s00384-008-0471-7] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 03/04/2008] [Indexed: 02/04/2023]
Abstract
PURPOSE Several multi-institutional prospective randomized trials have demonstrated short-term benefits using laparoscopy. Now the laparoscopic approach is accepted as an alternative to open surgery for colon cancer. However, in prior trials, the transverse colon was excluded. Therefore, it has not been determined whether laparoscopy can be used in the setting of transverse colon cancer. This study evaluated the peri-operative clinical outcomes and oncological quality by pathologic outcomes of laparoscopic surgery for transverse colon cancer. MATERIALS AND METHODS Analysis of the medical records of patients who underwent laparoscopic colorectal resection from August 2004 to November 2007 was made. Computed tomography, barium enema, and colonoscopy were performed to localize the tumor preoperatively. Extended right hemicolectomy, transverse colectomy, and extended left hemicolectomy were performed for transverse colon cancer. Surgical outcomes and pathologic outcomes were compared between transverse colon cancer (TCC) and other site colon cancer (OSCC). RESULTS Of the 312 colorectal cancer patients, 94 patients underwent laparoscopic surgery for OSCC, and 34 patients underwent laparoscopic surgery for TCC. Patients with TCC were similar to patients with OSCC in age, gender, body mass index, operating time, blood loss, time to pass flatus, start of diet, hospital stay, tumor size, distal resection margin, proximal resection margin, number of lymph nodes, and radial margin. One case in TCC and three cases in OSCC were converted to open surgery. CONCLUSIONS Laparoscopic surgery for transverse colon cancer and OSCC had similar peri-operative clinical and acceptable pathological outcomes.
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Affiliation(s)
- Y S Lee
- Department of Surgery, The Catholic University of Korea, Seoul, South Korea.
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Affiliation(s)
- M E Lee
- Department of Chemistry, Graduate School, Yonsei University, Seoul 120-749, Korea.
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Kim J, Oh SN, Cho HM, Park MK, Kim KR, Elkins JW. Background monitoring and long-range transport of atmospheric CFC-11 and CFC-12 at Kosan, Korea. Environ Monit Assess 2001; 70:47-56. [PMID: 11516020 DOI: 10.1023/a:1010640004389] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [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
The background concentrations of atmospheric CFC-11 and CFC-12 were monitored to assess their impact on stratospheric ozone depletion and global warming from September 1995 to March 1999 at Kosan, Korea, located at eastern margin of the Asian Continent. The concentrations of atmospheric CFC-11 at Kosan have decreased slightly, at a rate of -2.5 pptv yr(-1), over the period in response to the Montreal Protocol. The CFC-12 mixing ratio at Kosan continues to increase in the atmosphere at a rate of 5.7 pptv yr(-1) despite international regulations, because of its extreme atmosphere persistence. Recent trends of these two chlorofluorocarbons at Kosan, Korea were concordant with those of the northern hemispheric background monitored unit at Mauna Loa, Hawaii. The maximum seasonal mean mixing ratios of CFC-11 and CFC-12 at Kosan, Korea, were 270 +/- 4 pptv in the spring and 538 +/- 9 pptv in the winter, and the corresponding seasonal minima were 267 +/- 7 and 529 +/- 12 pptv. This occurred in the summer and was due to southeasterly winds from the northwestern Pacific Ocean. By performing a three-day isentropic backward trajectory analysis, it was shown that air masses at Kosan, and with the exception of summer, mainly originated from central and northern China. In particular, the mixing ratios of these two contaminant species are closely related with their air mass trajectories.
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Affiliation(s)
- J Kim
- Applied Meteorology Research Laboratory, Meterological Research Institute, Seoul, Korea.
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Chun EM, Park YJ, Kang HS, Cho HM, Jun DY, Kim YH. Expression of the apolipoprotein C-II gene during myelomonocytic differentiation of human leukemic cells. J Leukoc Biol 2001; 69:645-50. [PMID: 11310852] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023] Open
Abstract
Apolipoprotein C-II (apoC-II), which is known to activate lipoprotein lipase (LPL), was identified by ordered differential display (ODD)-polymerase chain reaction (PCR) as a cDNA fragment exhibiting a distinct increase in expression during 12-O-tetradecanoylphorbol 13-acetate (TPA)-induced differentiation of promonocytic U937 cells into monocytes and macrophages. The amount of apoC-II mRNA expression detectable in U937 cells significantly increased and reached a maximum 24-48 h after treatment with 32 nM TPA. apoC-II mRNA was also detected in monocytic THP-1 cells but was not detected in promyelocytic HL-60 cells. In healthy human tissues, the most significant expression of apoC-II mRNA was in the liver. Although apoC-II mRNA expression was markedly up-regulated during the induced differentiation of HL-60 cells into monocytes and macrophages with 32 nM TPA, such expression was not induced during the differentiation of HL-60 cells into granulocytes with 1.25% dimethyl sulfoxide. These results suggest that human apoC-II expression is induced at the transcription level during myelomonocytic differentiation and may confer an important role to macrophages involved in normal lipid metabolism and atherosclerosis.
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Affiliation(s)
- E M Chun
- Department of Microbiology, College of Natural Sciences, Kyungpook National University, Taegu, Korea
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Abstract
The nucleotide sequence of Hs 3-PGDH gene, encoding human 3-phosphoglycerate dehydrogenase that catalyzes the initiating step in the phosphorylated pathway of serine biosynthesis, has been determined. The 3-PGDH gene has a predicted 533 amino acid open reading frame, encoding a 56.8kDa protein that shares 94.0% similarity with rat-liver 3-PGDH. Two different transcripts corresponding to 3-PGDH mRNA were detected in human normal tissues. A dominant 2.1kb transcript was expressed at high levels in prostate, testis, ovary, brain, liver, kidney, and pancreas, and weakly expressed in thymus, colon, and heart. A 710bp transcript also appeared as a weaker band where the 2.1kb mRNA was expressed, and it was more significant than the 2.1kb mRNA in heart and skeletal muscle. The TPA-induced monocytic differentiation of U937, which also resulted in growth arrest, abruptly downregulated the expression of 3-PGDH. Removal of TPA restored cell growth through the retrodifferentiation process and subsequent expression of 3-PGDH. The 3-PGDH mRNA was markedly expressed in human leukemias, lymphoma Sup-T1, colon adenocarcinoma COLO 320DM, epitheloid carcinoma HeLa S3, and murine lymphoma BW5147.G.1.4, but not in human leukemia K562. This report demonstrates that the human 3-PGDH gene is regulated at the transcriptional level depending on tissue specificty and cellular proliferative status, and its transcriptional regulation mechanism may be a useful target for diagnosis and therapy of cancer.
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MESH Headings
- 3T3 Cells
- Amino Acid Sequence
- Animals
- Base Sequence
- Blotting, Northern
- Carbohydrate Dehydrogenases/genetics
- DNA, Complementary/chemistry
- DNA, Complementary/genetics
- DNA, Complementary/isolation & purification
- Female
- Gene Expression Regulation, Enzymologic
- HL-60 Cells
- HeLa Cells
- Humans
- Jurkat Cells
- K562 Cells
- Male
- Mice
- Molecular Sequence Data
- Phosphoglycerate Dehydrogenase
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- Sequence Alignment
- Sequence Analysis, DNA
- Sequence Homology, Amino Acid
- Tissue Distribution
- Tumor Cells, Cultured
- U937 Cells
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Affiliation(s)
- H M Cho
- Department of Microbiology, College of Natural Sciences, Kyungpook National University, Taegu, South Korea
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Lee YW, Cho HM, Shin DJ, Lee IW. Noncollimated bidirectional shearing interferometer for measuring a long radius of curvature. Appl Opt 1997; 36:5317-5320. [PMID: 18259348 DOI: 10.1364/ao.36.005317] [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: 05/25/2023]
Abstract
A method for measuring a long radius of curvature with a modified half-aperture bidirectional shearing interferometer is described. A plane mirror of the interferometer is replaced with a test mirror, and the incident beam is decollimated by shifting of the source to equalize the widths of the bidirectional shearing fringes reflected from the plane and test mirrors. This method can be applied to concave and convex surfaces.
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Affiliation(s)
- Y W Lee
- Quantum Metrology Division, Korea Research Institute of Standards and Science, P. O. Box 102, Yusong, Taejon, 305-600, South Korea
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Abstract
Griseofulvin(GF) has become the drug of choice as an antifungal agent for patients who suffer from many kinds of fungal infection. In order to clarify hepatic injury by griseofulvin(GF) overload and the effect of UDCA on GF-induced hepatic injury, the authors carried out biochemical, histologic, and ultrastructural studies of liver following treatment with griseofulvin and ursodeoxycholic acid(UDCA) in mice. Urine porphobilinogen excretion in the group treated with GF alone was significantly increased and reached the highest level in the 4th week and declined thereafter. Biochemical studies of the liver function showed no remarkable changes of serum bilirubin levels throughout the experimental period in all groups, except for SGPT and alkaline phosphatase activities which were significantly elevated and reached the highest level in the second week. Then they slightly decreased in GF treated groups(GF alone and GF plus UDCA) in comparison with the control group. Pathologic findings in the group treated with GF alone include focal liver cell necrosis(esp, zone 3), Mallory bodies in hepatocytes(esp, zone 1), Kupffer cell activation, and brown protoporphyrin pigments in the hepatocytes, bile canaliculi and interlobular bile ducts with a marked inflammatory cell infiltration in the portal tracts. Under the polarizing light microscope, bile ductular and canalicular thrombi showed a "Maltese cross" birefringence in mice treated with GF alone. There is no definite finding of fatty change in hepatocyte. Under the microscope, the liver appeared normal with an intact lobular architecture in the GF plus UDCA treated group. Electron microscopically, GF-induced changes include swelling of mitochondria, globular protoporphyrin crystals in the hepatocyte cytoplasm, markedly dilated bile cannaliculi and bile ducts and the formation of a Mallory hyaline bodies in the hepatocytes. There were no noticeable structural changes in the GF plus UDCA-treated group. Therefore the results suggest that GF causes hepatic injury, namely porphyria and cholestasis, and the treatment of UDCA may have cytoprotective and choleretic effects on GF-induced hepatic injuries.
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Affiliation(s)
- S W Choi
- Department of Internal Medicine & Clinical Pathology, Catholic University Medical College, Seoul, Korea
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Park YM, Lee CD, Yoon KH, Han NI, Cho HM, Yook KS, Jeong JW, Kim BS, Jee MK, Kim BK. A case of subcutaneous seeding of hepatocellular carcinoma after fine needle aspiration biopsy. Korean J Intern Med 1989; 4:96-100. [PMID: 2562134 PMCID: PMC4534970 DOI: 10.3904/kjim.1989.4.1.96] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Cancer spread along the needle track following fine needle aspiration biopsy is said to be a rare complication. The authors report a case of subcutaneous implantation of hepatocellular carcinoma following ultrasono-guided fine needle aspiration biopsy. The patient, a 67-year-old Korean male was found to have a large hepatocellular carcinoma diagnosed by fine needle aspiration biopsy. Four months later, the patient felt two subcutaneous growing lumps at the previous aspiration site. The authors confirmed them histologically 11 months after aspiration.
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Hong KH, Lee IW, Cho HM, Lee YW. Enhancement of accuracy in OTF measurement. Appl Opt 1987; 26:4423-4424. [PMID: 20523377 DOI: 10.1364/ao.26.004423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
A knife-edge scanning method was developed to enhance the accuracy in OTF measurement. A slit image formed by the lens under test was scanned by a knife-edge which was moved by a stepping motor. It was possible to increase the signal-to-noise ratio with averaging 4-32 data at each point through a scan. The standard deviation was decreased to under 0.25% in the MTF unit.
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Abstract
Reaction centers isolated from the photosynthetic bacterium Rhodopseudomonas sphaeroides R-26 mutant were irradiated with laser pulses of variable energy and the amount of photooxidation of the primary electron donor bacteriochlorophyll was measured. The resultant light saturation curve fits an exponential function and not a hyperbolic or hyperbolic tangent function. Analysis using either a Poisson statistical model or a simple kinetic model predicts an exponential light saturation curve in the limit where the light pulse is long relative to any transient intermediate states. The absolute quantum yield of photochemistry was found to be 0.98, utilizing the entire light saturation curve. Distortions from the simple exponential light saturation behavior are predicted when very short laser pulses are used.
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