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Park SH, Lee JH, Bong JG, Kim JG, Kim KH, Sang HJ, Youn HS. Comparative analysis of high resolution synchrotron radiation images of fibrocystic change and breast cancer. Cancer Res 2009. [DOI: 10.1158/0008-5472.sabcs-4009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Abstract #4009
Background: Synchrotron radiation imaging enables us to observe detailed microscopic structures of a biologic sample without staining. If synchrotron imaging can reveal microstructures of breast tissues with various pathologic conditions effectively, this may be used for clinical purposes related to diagnosis and treatment of breast diseases. We attempted to get high resolution x-ray microscopic images of human breast tissues of fibrocystic change and breast cancer using zone plates and phase contrast technique, and compared distinctive features of breast tissues of these conditions seen in synchrotron images.
 Material and Methods: X-ray microscopic images were obtained from the Beam line 1B2 of Pohang Light Source, the third generation synchrotron radiation facility with operating energy of 2.5 GeV at Pohang, South Korea. The x-ray was set at 11.1 KeV, and the beam was monochromatized by W/B4C monochromator. The condenser and microscopic objective zone plates were used as x-ray lenses. Formalin-fixed 10 μm thick human breast tissues were attached on Kapton film, and positioned 25 m away from the beam source. Zernike phase plate next to the condenser zone plate was applied for phase contrast imaging. The magnified x-ray image was converted into a visual image on the CsI(TI) scintillation crystal and captured by a full frame CCD camera. The obtained synchrotron images of fibrocystic change and breast cancer tissues were analyzed and compared to one another.
 Results: High resolution x-ray microscopic images of fibrocystic change and breast cancer tissues with a spatial resolution of 60 nm were obtained. The synchrotron images of fibrocystic change showed a harmonious framework of breast tissues with profuse glandular structures and various collagen strands. However, the synchrotron images of breast cancer tissues revealed altered breast parenchyma with architectural distortion and extensive fibrosis. The collagen strands were thickened, interrupted and irregularly oriented. The glandular elements and ductal structures were atrophic or lost.
 Discussion: The synchrotron images of breast cancer reveal severe alteration of breast parenchyma, collagen strands and glandular structures, compared to those of fibrocystic change. These changes are important features of breast cancer seen in high resolution synchrotron images.
Citation Information: Cancer Res 2009;69(2 Suppl):Abstract nr 4009.
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Kim BS, Kim DW, Im SA, Kim C, Kim TY, Yoon SS, Heo D, Bang YJ, Park S, Kim B, Kim N. Effective second-line chemotherapy for extranodal NK/T-cell lymphoma consisting of etoposide, ifosfamide, methotrexate, and prednisolone. Ann Oncol 2009; 20:121-8. [DOI: 10.1093/annonc/mdn551] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Johnson MA, Davey A, Park S, Hausman DB, Poon LW. Age, race and season predict vitamin D status in African American and white octogenarians and centenarians. J Nutr Health Aging 2008; 12:690-5. [PMID: 19043643 PMCID: PMC2978665 DOI: 10.1007/bf03028616] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
OBJECTIVE Poor vitamin D status has been associated with osteoporosis, falls, cardiovascular diseases, cancer, autoimmune diseases, pain, nursing home placement, and other age-related conditions, but little is known about the prevalence and predictors of vitamin D status in those aged 80 and older. Thus, this study tested the hypothesis that vitamin D status would be 1) poorer in a population-based multi-ethnic sample of centenarians as compared with octogenarians and 2) predicted by specific dietary, demographic or environmental factors. DESIGN Cross-sectional population-based analyses. SETTING Northern Georgia in the United States. PARTICIPANTS Men and women aged 80 to 89 (octogenarians, n=80) and 98 and older (centenarians, n=237). MEASUREMENTS Regression analyses were used to examine the associations of serum 25-hydroxyvitamin D [25(OH)D] with age, gender, race, living arrangements, dairy food intake, supplement intake, and season. RESULTS The prevalence of vitamin D insufficiency [25(OH)D<50 nmol/L] was higher in centenarians than in octogenarians (p<0.02). In logistic regression analyses, the risk of being vitamin D insufficient was significantly increased by being a centenarian vs. octogenarian (p<0.005) and by being African American vs. white (p<0.001) and decreased by taking a supplement with vitamin D (p<0.001) or by having vitamin D status measured in the summer or fall (each p<0.05), compared with spring. CONCLUSIONS Centenarians and octogenarians are at high risk for vitamin D insufficiency for many of the same reasons identified in younger populations. Given the numerous potential adverse consequences of poor vitamin D status, efforts are needed to ensure vitamin D adequacy in these older adults.
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Fletcher C, Coyne M, Villa O, Park S, Azadi P, Comstock L. Molecular Biology of Protein Glycosylation in the Symbiotic Anaerobe Bacteroides Fragilis. Int J Infect Dis 2008. [DOI: 10.1016/j.ijid.2008.05.149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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1255
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You JS, Park S, Chung SP, Park JW. Performance of cellular phones with video telephony in the use of automated external defibrillators by untrained laypersons. Emerg Med J 2008; 25:597-600. [PMID: 18723715 DOI: 10.1136/emj.2008.058503] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
AIM To evaluate the hypothesis that using an automated external defibrillator (AED) with video telephony-directed cellular phone instructions for untrained laypersons would increase the probability of successful performance of AEDs. Real-time communication with visual images can provide critical information and appropriate instructions to both laypersons and dispatchers. METHODS A prospective observational study was undertaken. 52 public officers with no previous experience in the use of a defibrillator were presented with a scenario in which they were asked to use an AED on a manikin according to the instructions given to them by cellular phones with video telephony. The proportion who successfully delivered a shock and the time interval from cardiac arrest to delivery of the shock were recorded. RESULTS Placement of the electrode pads was performed correctly by all 52 participants and 51 (98%) delivered an accurate shock. The mean (SD) time to correct shock delivery was 131.8 (20.6) s (range 101-202). CONCLUSION Correct pad placement and shock delivery can be performed using an AED when instructions are provided via video telephone because a dispatcher can monitor every step and provide correct information.
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Shin D, Yu T, Yang W, Jeon B, Park S, Hwang J. Combustion characteristics of simulated gas fuel in a 30 kg/h scale pyrolysis-melting incinerator. WASTE MANAGEMENT (NEW YORK, N.Y.) 2008; 28:2422-2427. [PMID: 18325753 DOI: 10.1016/j.wasman.2007.11.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2006] [Revised: 08/26/2007] [Accepted: 11/25/2007] [Indexed: 05/26/2023]
Abstract
Combustion characteristics of gas fuel in a pyrolysis-melting incinerator having a 30 kg/h capacity were investigated. Pyrolyzed gas from waste was simulated by propane that was injected in the combustion chamber, and burnt through multi-staged combustion by distributing the combustion air to primary, secondary, and tertiary air nozzles. Temperatures and the concentrations of gas components in the combustion chamber were measured. Combustion performance was evaluated with respect to the temperature distribution and combustion gas concentrations of O2, CO and NOx. Using secondary air and/or tertiary air, the combustion performance was improved, and, in particular, NOx concentration decreased significantly following the tertiary air injection.
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Kim D, Lee Y, Cho K, Ham W, Park S, Choi Y, Hong S. POD-6.09: Retroperitoneal Lymph Node Recurrence in Patients with Transitional Cell Carcinoma of Upper Urinary Tract. Urology 2008. [DOI: 10.1016/j.urology.2008.08.125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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1258
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Lee K, Park SH, Cha YH, Lee JY, Lee YW, Yea KH, Jeong YU. Generation of intense proton beams from plastic targets irradiated by an ultraintense laser pulse. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2008; 78:056403. [PMID: 19113222 DOI: 10.1103/physreve.78.056403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2007] [Revised: 09/06/2008] [Indexed: 05/27/2023]
Abstract
Proton beams generated from thin aluminum and Mylar foil targets that are irradiated by a 30fs Ti:sapphire laser pulse with an intensity of 2.2x10;{18}Wcm;{2} were investigated. Protons from the Mylar targets were observed to have an energy higher by a factor of 2 and were higher in number by an order of magnitude as compared with those generated from the aluminum targets. The maximum proton energy of 1.3+/-0.12MeV obtained from the Mylar target was found to be similar with previous observations that used laser pulses with different intensities. To address the anomalous behavior of the maximum proton energy for plastic targets, an acceleration model is proposed. In this model, the protons are accelerated by a resistively induced electric field in the front of the target, which can account for the experimental observations.
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Lee Y, Hong S, Cho K, Kim D, Ham W, Park S, Choi Y, Kwon S. MP-1.01: The Role of Hyperinsulinemia and Insulin Resistance in Prostate Growth: Are They Truly Associated with Prostatic Enlargement? Urology 2008. [DOI: 10.1016/j.urology.2008.08.199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Park S. Comparison of the Efficacy of the Pulsed Bipolar System and Conventional Bipolar Electrosurgery in Total Laparoroscopic Hysterectomy (TLH). J Minim Invasive Gynecol 2008. [DOI: 10.1016/j.jmig.2008.09.426] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Portet C, Chmiola J, Gogotsi Y, Park S, Lian K. Electrochemical characterizations of carbon nanomaterials by the cavity microelectrode technique. Electrochim Acta 2008. [DOI: 10.1016/j.electacta.2008.05.019] [Citation(s) in RCA: 98] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Park S, Scheffler TL, Gunawan AM, Shi H, Zeng C, Hannon KM, Grant AL, Gerrard DE. Chronic elevated calcium blocks AMPK-induced GLUT-4 expression in skeletal muscle. Am J Physiol Cell Physiol 2008; 296:C106-15. [PMID: 18971392 DOI: 10.1152/ajpcell.00114.2008] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Muscle contraction stimulates glucose transport independent of insulin. Glucose uptake into muscle cells is positively related to skeletal muscle-specific glucose transporter (GLUT-4) expression. Therefore, our objective was to determine the effects of the contraction-mediated signals, calcium and AMP-activated protein kinase (AMPK), on glucose uptake and GLUT-4 expression under acute and chronic conditions. To accomplish this, we used pharmacological agents, cell culture, and pigs possessing genetic mutations for increased cytosolic calcium and constitutively active AMPK. In C2C12 myotubes, caffeine, a sarcoplasmic reticulum calcium-releasing agent, had a biphasic effect on GLUT-4 expression and glucose uptake. Low-concentration (1.25 to 2 mM) or short-term (4 h) caffeine treatment together with the AMPK activator, 5-aminoimidazole-4-carboxamide-1-beta-D-ribonucleoside (AICAR), had an additive effect on GLUT-4 expression. However, high-concentration (2.5 to 5 mM) or long-term (4 to 30 h) caffeine treatment decreased AMPK-induced GLUT-4 expression without affecting cell viability. The negative effect of caffeine on AICAR-induced GLUT-4 expression was reduced by dantrolene, which desensitizes the ryanodine receptor. Consistent with cell culture data, increases in GLUT-4 mRNA and protein expression induced by AMPK were blunted in pigs possessing genetic mutations for both increased cytosolic calcium and constitutively active AMPK. Altogether, these data suggest that chronic exposure to elevated cytosolic calcium concentration blocks AMPK-induced GLUT-4 expression in skeletal muscle.
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Bharathy M, Rassolov VA, Park S, zur Loye HC. Crystal Growth of Two New Photoluminescent Oxides: Sr3Li6Nb2O11 and Sr3Li6Ta2O11. Inorg Chem 2008; 47:9941-5. [DOI: 10.1021/ic801102t] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Park S, Chen ZY, Chanda AK, Schneider RW, Hollier CA. Viability of Phakopsora pachyrhizi Urediniospores Under Simulated Southern Louisiana Winter Temperature Conditions. PLANT DISEASE 2008; 92:1456-1462. [PMID: 30769571 DOI: 10.1094/pdis-92-10-1456] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Soybean rust, caused by Phakopsora pachyrhizi, originally occurred in Asia. It has now spread to South America and the continental United States. This disease has the potential to cause severe economic losses to U.S. soybean growers, especially in the south, where the environmental conditions are more favorable to P. pachyrhizi survival during winter. In the present study, the effect of simulated southern Louisiana winter temperature conditions (12°C, 14-h days and 1°C, 10-h nights with 75% relative humidity) on soybean rust urediniospore viability was examined. It was found that urediniospore viability declined rapidly from 72 to 40% after 1 day and then decreased gradually to 17% after 7 days and 11% after 60 days. Spores stored under southern Louisiana winter conditions for 60 days still produced pustules on inoculated leaves. In comparison, the viability of spores stored at room temperature decreased gradually and reached 0% at the end of 60 days. Winter temperature treatment not only reduced spore viability but also decreased germ tube growth. In addition, soybean rust spores recovered from overwintered dry kudzu leaves were also found viable. This study indicates that soybean rust spores could survive southern Louisiana winter conditions and initiate a new cycle of infection in the next growing season.
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Wu W, Kiryukhin V, Noh HJ, Ko KT, Park JH, Ratcliff W, Sharma PA, Harrison N, Choi YJ, Horibe Y, Lee S, Park S, Yi HT, Zhang CL, Cheong SW. Formation of pancakelike Ising domains and giant magnetic coercivity in ferrimagnetic LuFe2O4. PHYSICAL REVIEW LETTERS 2008; 101:137203. [PMID: 18851488 DOI: 10.1103/physrevlett.101.137203] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2008] [Indexed: 05/26/2023]
Abstract
We have studied quasi-two-dimensional multiferroic LuFe2O4 with strong charge-spin-lattice coupling, in which low-temperature coercivity approaches an extraordinary value of 9 T in single crystals. The enhancement of the coercivity is connected to the collective freezing of nanoscale pancakelike ferrimagnetic domains with large uniaxial magnetic anisotropy ("Ising pancakes"). Our results suggest that collective freezing in low-dimensional magnets with large uniaxial anisotropy provides an effective mechanism to achieve enhanced coercivity. This observation may help identify novel approaches for synthesis of magnets with enhanced properties.
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Oh YJ, Jo W, Kim S, Park S, Kim YS. Nanoscale observation of local bound charges of patterned protein arrays by scanning force microscopy. NANOTECHNOLOGY 2008; 19:365302. [PMID: 21828867 DOI: 10.1088/0957-4484/19/36/365302] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
A protein patterned surface using micro-contact printing methods has been investigated by scanning force microscopy. Electrostatic force microscopy (EFM) was utilized for imaging the topography and detecting the electrical properties such as the local bound charge distribution of the patterned proteins. It was found that the patterned IgG proteins are arranged down to 1 µm, and the 90° rotation of patterned anti-IgG proteins was successfully undertaken. Through the estimation of the effective areas, it was possible to determine the local bound charges of patterned proteins which have opposite electrostatic force behaviors. Moreover, we studied the binding probability between IgG and anti-IgG in a 1 µm(2) MIMIC system by topographic and electrostatic signals for applicable label-free detections. We showed that the patterned proteins can be used for immunoassay of proteins on the functional substrate, and that they can also be used for bioelectronics device application, indicating distinct advantages with regard to accuracy and a label-free detection.
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Chang J, Suh T, Jung W, Jang H, Park S. Metal Artifact Reduction Technique for Accurate Seeds Localization using Limited EPID Projections and Deformable Registration. Int J Radiat Oncol Biol Phys 2008. [DOI: 10.1016/j.ijrobp.2008.06.174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Lee K, Lee S, Cho E, Jeong S, Park J, Choi S, Park S. Concurrent Radiation Therapy and Chemotherapy with Continuous Paclitaxel Infusion Plus Weekly Cisplatin for Stage III Non-small Cell Lung Cancer: A Better Result than Weekly Paclitaxel and Cisplatin. Int J Radiat Oncol Biol Phys 2008. [DOI: 10.1016/j.ijrobp.2008.06.1808] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Je H, Choi E, Ahn S, Lee S, Park S, Kim J. Analysis of Respiratory Induced Liver Motion using Fiducial Marker in Stereotactic Radiosurgery for Liver Tumor. Int J Radiat Oncol Biol Phys 2008. [DOI: 10.1016/j.ijrobp.2008.06.090] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Berbeco R, Ionascu D, Hacker F, Zatwarnicki C, Park S, O'Farrell D, Mamon H. Convergent Radiotherapy: Adaptive Treatment Planning with Delivered Dose Information. Int J Radiat Oncol Biol Phys 2008. [DOI: 10.1016/j.ijrobp.2008.06.333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Kim HJ, Byun JH, Lee SS, Park SH, Lee MG, Kim MH, Yu ES. Metachronous multi-organ lesions in a jaundiced patient. Gut 2008; 57:1297, 1299. [PMID: 18719140 DOI: 10.1136/gut.2007.138529] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/08/2022]
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Choi W, Park S, Choi E, Kim J, Ahn S, Jung S, Lee S. Dose Optimization of Simultaneous Modulated Accelerated Radiation Therapy (SMART) using Fluorine-18-Labeled Fluoromisonidazole Positron Emission Tomography for Head and Neck Cancer. Int J Radiat Oncol Biol Phys 2008. [DOI: 10.1016/j.ijrobp.2008.06.507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Park S, Huh S. A fluorescent two-dimensional Zn(II) framework containing 2,2′-bipyridine-5,5′-dicarboxylic acid. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308082676] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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1275
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Bardhan J, Makowski L, Park S. Computational challenges in wide-angle X-ray solution scattering (WAXS). Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308092957] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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