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Search Results: 1 - 10 of 7667 matches for " Soon-Oh Jung "
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Analysis of Skin Humidity Variation Between Sasang Types
Soon-Oh Jung,Soo-Jin Park,Han Chae,Soo Hyun Park,Minwoo Hwang,Sang-Hyuk Kim,Young-Kyu Kwon
Evidence-Based Complementary and Alternative Medicine , 2009, DOI: 10.1093/ecam/nep087
Abstract: The purpose of this study was to examine the relationship between variations in skin humidity (SH) induced by perspiration across Sasang types and to identify novel and effective Sasang classification factors. We also analyzed the responses of each Sasang type to sweating-related QSCC II items. The results revealed a significant difference in SH across gender and significant differences in SH before and after perspiration between Tae-Eum and So-Eum men. In addition, Tae-Eum women showed significant differences in SH compared with women classified as another Sasang type. Furthermore, evaluation of the items related to sweating in the QSCC II and their relationship to each constitution revealed a significant difference between Tae-Eum and other Sasang types. Overall, the results of this study indicate that there is a distinct SH difference following perspiration between Tae-Eum and other Sasang types. Such findings may aid in Sasang typology diagnostic testing with the support of further sophisticated clinical studies.
Vegetation of mono-layer landfill cover made of coal bottom ash and soil by compost application  [PDF]
Seul Bi Lee, Sang Yoon Kim, Chan Yu, Soon-Oh Kim, Pil Joo Kim
Journal of Agricultural Chemistry and Environment (JACEN) , 2013, DOI: 10.4236/jacen.2013.23008
Abstract: Monolayer barriers called evapotranspiration (ET) covers were developed as alternative final cover systems in waste landfills but high-quality soil remains a limiting factor in these cover systems. Coal bottom ash was evaluated to be a very good alternative to soil in previous tests and a combination of soil (65% wt.wt-1) and coal bottom ash (35% wt.wt-1) was evaluated to be the most feasible materials for ET cover systems. In our pot test, selected manure compost as soil amendment for the composite ET cover system, which was made of soil and bottom ash at ca. 40 Mg.ha-1 application level was very effective to promote vegetation growth of three plants; namely, garden cosmos (Cosmosbipinnatus), Chinese bushclover (Lespedezacuneata), and leafy lespedeza (Lespedeza cyrtobotrya). To evaluate the effect of compost application on plant growth in an ET vegetative cover system, two couples of lysimeters, packed with soil and a mixture of soil and bottom ash, were installed in a pilot landfill cover system in 2007. Manure composts were applied at the rates of 0 and  40 Mg.ha-11before sowing the five plant species, i.e.indigo-bush (Amorphafruticosa), Japanese mugwort (Artemisia princeps, Arundinella hirta, Lespedezacuneata, and Lespedezacyrtobotrya). Unseeded native plant (green foxtail,Setaria viridis) was dominant in all treatments in the 1st year after installation while the growth of the sown plants significantly improved over the years. Total biomass productivity significantly increased with manure compost application, and more significantly increased in the composite ET cover made of soil and bottom ash treatment compared to the single soil ET cover, mainly due to more improved soil nutrient levels promoting vegetation growth and maintaining the vegetation system. The use of bottom ash as a mixing material in ET cover systems has a strong potential as an alternative to fine-grained soils, and manure compost addition can effectively enhance vegetative propagation in ET cover systems.
Removal of arsenate and arsenite from aqueous solution by waste cast iron

Nag-Choul Choi,Song-Bae Kim,Soon-Oh Kim,Jae-Won Lee,Jun-Boum Park,

环境科学学报(英文版) , 2012,
Abstract: The removal of As(III) and As(V) from aqueous solution was investigated using waste cast iron, which is a byproduct of the iron casting process in foundries. Two types of waste cast iron were used in the experiment: grind precipitate dust (GPD) and cast iron shot (CIS). The X-ray diffraction analysis indicated the presence of Fe0 on GPD and CIS. Batch experiments were performed under different concentrations of As(III) and As(V) and at various initial pH levels. Results showed that waste cast iron was effective in the removal of arsenic. The adsorption isotherm study indicated that the Langmuir isotherm was better than the Freundlich isotherm at describing the experimental result. In the adsorption of both As(III) and As(V), the adsorption capacity of GPD was greater than CIS, mainly due to the fact that GPD had higher surface area and weight percent of Fe than CIS. Results also indicated the removal of As(III) and As(V) by GPD and CIS was influenced by the initial solution pH, generally decreasing with increasing pH from 3.0 to 10.5. In addition, both GPD and CIS were more effective at the removal of As(III) than As(V) under given experimental conditions. This study demonstrates that waste cast iron has potential as a reactive material to treat wastewater and groundwater containing arsenic.
Evaluation of Methane Yield on Mesophilic-Dry Anaerobic Digestion of Piggery Manure Mixed with Chaff for Agricultural Area  [PDF]
Dong-Heui Kwak, Mi-Sug Kim, Jae-Seung Kim, Young-Youl Oh, Soon-Ok Noh, Byung-Ok So, Su-Young Jung, Su-Jin Jung, Soo-Wan Chae
Advances in Chemical Engineering and Science (ACES) , 2013, DOI: 10.4236/aces.2013.34029
Abstract: A mesophilic-dry anaerobic digestion process is valid in treating high-concentration substrates containing low moisture content. It has merits of lower wastewater discharge and lower heat capacity required in maintaining reactor temperature as compared with a thermophilic-wet anaerobic digestion process. In fact, chaff can be easily obtained in farming areas and used as a mixture substrate as one of bulking agents for controlling moisture and supplying carbon. For this reason, this study applies the chaff to improve livestock manure, which contains high moisture content and is discharged from domestic pig farms. This study aims at verifying its feasibility for improving methane production efficiency on a basis of BMP (Biochemical Methane Potential) assay obtained through a series of experiments. Finding results were methane gas production and gas production per volatile solid (VS) added, and methane gas production among biogas production were increased as the chaff added in the piggery manure was increased. According to experimental results for improving the methane production efficiency, mixture of the chaff and the piggery manure played an important role in controlling the moisture content and improving the methane gas production rate, and also verified its feasibility in the mesophilic-dry anaerobic digestion process indicating relatively less difficulty for operation and management.
Paclitaxel-loaded poly(lactide-co-glycolide)/poly(ethylene vinyl acetate) composite for stent coating by ultrasonic atomizing spray
Soon Hong Yuk, Keun Sang Oh, Jinah Park, Soon-Joong Kim, Jung Ho Kim and Il Keun Kwon
Science and Technology of Advanced Materials , 2012,
Abstract: The mixture of poly(lactide-co-glycolide) (PLGA) and poly(ethylene vinyl acetate) (PEVA) forms a homogeneous liquid in an organic solvent such as tetrahydrofuran, and a phase-separated PLGA/PEVA composite can be prepared from it by evaporating the organic solvent. Exploiting this phenomenon, we designed a novel method of preparing a drug-loaded PLGA/PEVA composite and used it for coating drug-eluting stents (DESs). Paclitaxel (PTX), an anticancer drug, was chosen as a model drug. PLGA acts as a microdepot for PTX, and PEVA provides mechanical strength to the coating material. The presence of PLGA in the PLGA/PEVA composite suppressed PTX crystallization in the coating material, and PTX showed a sustained release rate over more than 30 days. The mechanical strength of the PLGA/PEVA composite was better than that of PEVA used as a control. After coating the stent with a PLGA/PEVA composite using ultrasonic atomizing spray, the morphology of the coated material was observed by scanning electron microscopy, and the release pattern of PTX was measured by high-performance liquid chromatography.
New Constituents from the Korean Sponge Plakortis simplex
Jung Soon Oh,Buyng Su Hwang,Ok-Hwa Kang,Dong-Yeul Kwon,Jung-Rae Rho
Marine Drugs , 2013, DOI: 10.3390/md11114407
Abstract: Six new cyclic peroxides ( 1– 6) were isolated from the Korean sponge Plakortis simplex, along with two new alkylpyridinium alkaloids ( 7 and 8). The structures of these compounds were completely determined by a combination of NMR analysis and chemical reactions. Compounds 1– 6 exhibited cytotoxic/antifungal activities against RAW264.7 cells and Candida albicans.
Microporation is a valuable transfection method for efficient gene delivery into human umbilical cord blood-derived mesenchymal stem cells
Jung Lim, Sun Park, Chang Jeong, Ji Oh, Seong Kim, Chung Ryu, Soon A Park, Jae Ahn, Wonil Oh, Sin-Soo Jeun, Jong Chang
BMC Biotechnology , 2010, DOI: 10.1186/1472-6750-10-38
Abstract: Using microporation with EGFP as a reporter gene, hUCB-MSCs were transfected with higher efficiency (83%) and only minimal cell damage than when conventional liposome-based reagent (<20%) or established electroporation methods were used (30-40%). More importantly, microporation did not affect the immunophenotype of hUCB-MSCs, their proliferation activity, ability to differentiate into mesodermal and ectodermal lineages, or migration ability towards cancer cells. In addition, the BDNF gene could be successfully transfected into hUCB-MSCs, and BDNF expression remained fairly constant for the first 2 weeks in vitro and in vivo. Moreover, microporation of BDNF gene into hUCB-MSCs promoted their in vitro differentiation into neural cells.Taken together, the present data demonstrates the value of microporation as an efficient means of transfection of MSCs without changing their multiple properties. Gene delivery by microporation may enhance the feasibility of transgenic stem cell therapy.Stem cells are highly attractive and valuable candidates for biomedical applications including the development of cell and gene therapy. Of the various stem cells, mesenchymal stem cells (MSCs) show a particular potential for clinical use because of their high proliferative capacity, ability to differentiate into multiple lineages [1-3], and ability to migrate into injured organs [4,5] and cancers [6,7]. Moreover, MSCs are not immunogenic, and so do not elicit a proliferative response of allogeneic lymphocytes in vitro [8]. Therefore, MSCs have become a major focus of research for potential therapeutic applications for various diseases.In recent years, efforts have been made to improve the therapeutic efficacy of MSCs through combination approaches using MSCs and genes. Additionally, a new therapeutic strategy has been developed that uses MSCs for the targeted delivery and local production of biologic agents in tumors [6,9]. Viruses are commonly used as vehicles to deliver transgenes into
Effects of Flow-Induced Shear Stress on Limbal Epithelial Stem Cell Growth and Enrichment
Yun Gyeong Kang, Ji Won Shin, So Hee Park, Min-Jae Oh, Hyo Soon Park, Jung-Woog Shin, Su-Hyang Kim
PLOS ONE , 2014, DOI: 10.1371/journal.pone.0093023
Abstract: The roles of limbal epithelial stem cells (LESCs) are widely recognized, but for these cells to be utilized in basic research and potential clinical applications, researchers must be able to efficiently isolate them and subsequently maintain their stemness in vitro. We aimed to develop a biomimetic environment for LESCs involving cells from their in vivo niche and the principle of flow-induced shear stress, and to subsequently demonstrate the potential of this novel paradigm. LESCs, together with neighboring cells, were isolated from the minced limbal tissues of rabbits. At days 8 and 9 of culture, the cells were exposed to a steady flow or intermittent flow for 2 h per day in a custom-designed bioreactor. The responses of LESCs and epithelial cells were assessed at days 12 and 14. LESCs and epithelial cells responded to both types of flow. Proliferation of LESCs, as assessed using a BrdU assay, was increased to a greater extent under steady flow conditions. Holoclones were found under intermittent flow, indicating that differentiation into transient amplifying cells had occurred. Immunofluorescent staining of Bmi-1 suggested that steady flow has a positive effect on the maintenance of stemness. This finding was confirmed by real-time PCR. Notch-1 and p63 were more sensitive to intermittent flow, but this effect was transient. K3 and K12 expression, indicative of differentiation of LESCs into epithelial cells, was induced by flow and lasted longer under intermittent flow conditions. In summary, culture of LESCs in a bioreactor under a steady flow paradigm, rather than one of intermittent flow, is beneficial for both increasing proliferation and maintaining stemness. Conversely, intermittent flow appears to induce differentiation of LESCs. This novel experimental method introduces micro-mechanical stimuli to traditional culture techniques, and has potential for regulating the proliferation and differentiation of LESCs in vitro, thereby facilitating research in this field.
Effect of SiC-Impurity Layer and Growth Temperature on MgB2 Superconducting Tapes Fabricated by HPCVD
Mahipal Ranot,Won Kyung Seong,Soon-Gil Jung,Won Nam Kang,J Joo,C-J Kim,B-H Jun,S. Oh
Physics , 2011,
Abstract: The influence of SiC-impurity layer and growth temperature on microstructure and superconducting properties were studied for MgB2 superconducting tapes. The pulsed laser deposition (PLD) system was used for the deposition of amorphous SiC-impurity layers on the flexible metallic Cu (001) tapes. The MgB2 superconducting tapes were fabricated by growing MgB2 films on the top of SiC/Cu tapes over a wide temperature range of 460 - 600 {\deg}C by using hybrid physical-chemical vapor deposition (HPCVD) system. Among all tapes, the MgB2/SiC/Cu tape deposited at a temperature of 540 {\deg}C has the highest Tc of ~ 37.7 K. Scanning electron microscopy (SEM) images revealed the hexagonal shaped MgB2 grains with good connectivity, and their sizes were found to vary with growth temperatures. As compared to MgB2/Cu tapes, the MgB2/SiC/Cu tapes exhibited opposite trend in the dependence of critical current density (Jc) with deposition temperatures. The improved Jc (H) behavior could be explained on the basis of the enhanced flux pinning force density (Fp) for MgB2/SiC/Cu tapes upon increasing growth temperature.
Primary signet ring cell carcinoma of the appendix: A rare case report and our 18-year experience
Yoon Ho Ko, Chan-Kwon Jung, Soon Nam Oh, Tae Hee Kim, Hye Sung Won, Jin Hyoung Kang, Hyung Jin Kim, Won Kyung Kang, Seong Taek Oh, Young Seon Hong
World Journal of Gastroenterology , 2008,
Abstract: Primary adenocarcinoma of the appendix is a rare malignancy that constitutes < 0.5% of all gastrointestinal neoplasms. Moreover, primary signet ring cell carcinoma of the appendix is an exceedingly rare entity. We have encountered 15 cases of primary appendiceal cancer among 3389 patients who underwent appendectomy over the past 18 years. In the present report, we describe a rare case of primary signet ring cell carcinoma of the appendix with ovarian metastases and unresectable peritoneal dissemination occurring in a 67-year-old female patient. She underwent appendectomy and bilateral salpingo-oophorectomy with a laparoscopy procedure. She then received palliative systemic chemotherapy with 12 cycles of oxaliplatin, 5-fluorouracil, and leucovorin (FOLFOX-4). The patient currently is well without progression of disease 12 mo after beginning chemotherapy.
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