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Search Results: 1 - 10 of 38380 matches for " Jun-Bong Seo "
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The effect of dimiristoylphosphatidylethanol on the rotational mobility of n-(9-Anthroyloxy) stearic acid in neuronal and model membranes  [PDF]
Young-Sik Park, No-Soo Park, Jun-Bong Seo, Soo-Kyoung Bae, You-Kwang kim, Ki-Soo Seong, Young-Jun Kim, Ju-Won Park, Joung-Moung Shin, Young-Chan Jeon, In-Kyo Chung, Moon-Kyoung Bae, Hye-Ock Jang, Il Yun
Journal of Biophysical Chemistry (JBPC) , 2010, DOI: 10.4236/jbpc.2010.13016
Abstract: The aim of this study was to provide a basis for examining the molecular mechanism for the pharmacological action of ethanol. We studied di¬myristoyl¬phosphatidylethanol (DMPEt)’s effects on specific locations of n-(9-anthroyloxy) palmitic acid or stearic acid (n-AS) within phos¬pholipids of synaptosomal plasma membrane vesicles isolated from bovine cerebral cortex (SPMV) and liposomes of total lipids (SPMVTL) and phospholipids (SPMVPL) extracted from SPMV. DMPEt increased rotational mobility (increased disordering) of hydrocarbon interior, but it decreased mobility (increased ordering) of membrane interface, in native and model membranes. The degree of rotational mobility in accordance with the carbon atom numbers of phospholipids comprising neuronal membranes was in the order at the 16, 12, 9, 6 and 2 position of aliphatic chain present in phospholipids. The sensitivity of increasing or decreasing effect of rotational mobility of hydrocarbon interior or surface region by DMPEt differed depending on the neuronal and model membranes in the descending order of SPMV, SPMVPL and SPMVTL.
Hwang Sun Won y Juan Rulfo, Corea y México en la narrativa de los a os cincuenta
Claudia Macías,Yoon Bong Seo
Espiral , 1998,
Abstract:
Reconfigurable Gradient Index using VO2 Memory Metamaterials
M. D. Goldflam,T. Driscoll,B. Chapler,O. Khatib,N. Marie Jokerst,S. Palit,D. R. Smith,Bong-Jun Kim,Giwan Seo,Hyun-Tak Kim,M. Di Ventra,D. N. Basov
Physics , 2011, DOI: 10.1063/1.3615804
Abstract: We demonstrate tuning of a metamaterial device that incorporates a form of spatial gradient control. Electrical tuning of the metamaterial is achieved through a vanadium dioxide layer which interacts with an array of split ring resonators. We achieved a spatial gradient in the magnitude of permittivity, writeable using a single transient electrical pulse. This induced gradient in our device is observed on spatial sc ales on the order of one wavelength at 1 THz. Thus, we show the viability of elements for use in future devices with potential applications in beamforming and communications
Solid-Phase Immunoassay of Polystyrene-Encapsulated Semiconductor Coreshells for Cardiac Marker Detection
Sanghee Kim,Jaetae Seo,Roopchan Ramdon,Hyeon-Bong Pyo,Kyuho Song,Byoung Hun Kang
Journal of Nanomaterials , 2012, DOI: 10.1155/2012/693575
Abstract: A solid-phase immunoassay of polystyrene-encapsulated semiconductor nanoparticles was demonstrated for cardiac troponin I (cTnI) detection. CdSe/ZnS coreshells were encapsulated with a carboxyl-functionalized polystyrene nanoparticle to capture the target antibody through a covalent bonding and to eliminate the photoblinking and toxicity of semiconductor luminescent immunosensor. The polystyrene-encapsulated CdSe/ZnS fluorophores on surface-modified glass chip identified cTnI antigens at the level of ~ng/mL. It was an initial demonstration of diagnostic chip for monitoring a cardiovascular disease.
Lower Lip Reconstruction after Wide Excision of a Malignancy with Barrel-Shaped Excision or the Webster Modification of the Bernard Operation
Hyung Joon Seo,Seong Hwan Bae,Su Bong Nam,Soo Jong Choi
Archives of Plastic Surgery , 2013, DOI: http://dx.doi.org/10.5999/aps.2013.40.1.36
Abstract: Background Because there are numerous methods for reconstruction of the lower lip,it is not easy to choose the optimal method. In choosing the surgical method for lowerlip reconstruction, we obtained acceptable outcomes based on our treatment strategy,which included either a barrel-shaped excision or the Webster modification of the Bernardoperation. We report on the surgical outcomes based on our treatment strategy.Methods This study included 26 patients who underwent lower lip reconstructive surgeryfrom September 1996 to September 2010. The operation was done using either a barrelshapedexcision or the Webster modification, considering the location of the defect, the size ofthe defect, and the amount of residual tissue on the lateral side of the vermilion after excision.Results In our series, 3 patients underwent a single barrel-shaped excision, and nine patientsunderwent a double barrel-shaped excision. In addition, the unilateral Webster modificationwas performed on in 6 patients, and there were eight cases of bilateral Webster modification.All of the patients except one were satisfied with the postoperative shape of the lip. In onecase both recurrence and dehiscence occurred. One patient had a good postoperative lip shape,but had difficulty wearing a denture, and also underwent commissuroplasty. Furthermore,there were two patients who complained of drooling, and 4 with paresthesia.Conclusions A soft tissue defect resulting from wide excision of a lower lip malignancy canbe successfully reconstructed using only one of two surgical methods: the barrel-shapedexcision or the Webster modification of the Bernard operation.
Content Authoring and Cloud System Implementation for Smart Learning  [PDF]
Hyun-Seo Hwang, Jin-Tae Park, Kyeong-Taek Seo, Jun-Soo Yun, Il-Young Moon, Oh-Young Kwon, Byeong-Jun Kim
Journal of Computer and Communications (JCC) , 2015, DOI: 10.4236/jcc.2015.35017
Abstract:

In this paper, we implement a content authoring and cloud system for cloud-based smart cloud learning. With the advent of the smartphone and mobile devices such as tablets, the educational paradigm is also changing. Was using the computer to aid in the learning e-learning started in ICT education are evolving Over the variety, in recent years, combines smart learning and social learning, cloud-based smart devices in e-learning the concept of Smart Cloud Smart Education Services Learning was gives rise to the term. Smart Cloud and free running is always the knowledge content uploaded by anyone, anywhere, can also be shared with other users. A terminal and location, without limitations on time, are continuously available to the environment of a high- quality knowledge content was coming through a variety of smart media, open educational content platform is built over the level of the possible conditions than e-learning. In this paper, we develop applications and Web sites that can provide authored content for smart cloud learning. In addition, we have built the cloud for content management and the website that can share content with other users. In the future, should wish to study a way that can provide customized services over the learner analysis based on big data technology.

A case of colon perforation due to enteropathy-associated T-cell lymphoma
Jun Bong Kim,Seong Hwan Kim,Young Kwan Cho,Sang Bong Ahn
World Journal of Gastroenterology , 2013, DOI: 10.3748/wjg.v19.i11.1841
Abstract: Enteropathy-associated T-cell lymphoma (EATL) is an extremely rare disease, which is often related to gluten-sensitive enteropathy. It is an uncommon intestinal lymphoma with very poor prognosis and high mortality rate. In the absence of specific symptoms or radiological findings, it is difficult to diagnose early. Major complications of EATL have been known as intestinal perforation or obstruction, and only 5 cases of EATL are reported in South Korea. In this study, we report a case of 71-year-old male with symptoms of diarrhea, which later it progressed into cancer perforation of the colon. The initial colonoscopic findings were normal and computed tomography scan demonstrated a segmental wall thickening of the distal ascending colon with nonspecific multiple small lymphnodes, along the ileocolic vessels, but no signs of mass or obstruction. The histologic findings of resected specimen confirmed EATL type II. Patient expired two weeks after the operation. Therefore, we emphasize the need of random biopsy in the presence of normal mucosa appearance on colonoscopy for the early diagnosis of EATL.
Viperin Regulates Cellular Lipid Metabolism during Human Cytomegalovirus Infection
Jun-Young Seo,Peter Cresswell
PLOS Pathogens , 2013, DOI: 10.1371/journal.ppat.1003497
Abstract: Human cytomegalovirus (HCMV) has been shown to induce increased lipogenesis in infected cells, and this is believed to be required for proper virion envelopment. We show here that this increase is a consequence of the virus-induced redistribution of the host protein viperin to mitochondria and its capacity to interact with and block the function of the mitochondrial trifunctional protein (TFP), the enzyme that mediates fatty acid-β-oxidation. The resulting decrease in cellular ATP levels activates the enzyme AMP-activated protein kinase (AMPK), which induces expression of the glucose transporter GLUT4, resulting in increased glucose import and translocation to the nucleus of the glucose-regulated transcription factor ChREBP. This induces increased transcription of genes encoding lipogenic enzymes, increased lipid synthesis and lipid droplet accumulation, and generation of the viral envelope. Viperin-dependent lipogenesis is required for optimal production of infectious virus. We show that all of these metabolic outcomes can be replicated by direct targeting of viperin to mitochondria in the absence of HCMV infection, and that the motif responsible for Fe-S cluster binding by viperin is essential. The data indicate that viperin is the major effector underlying the ability of HCMV to regulate cellular lipid metabolism.
Enhancement in Elastic Modulus of GFRP Bars by Material Hybridization  [PDF]
Dong-Woo Seo, Ki-Tae Park, Young-Jun You, Hyeong-Yeol Kim
Engineering (ENG) , 2013, DOI: 10.4236/eng.2013.511105
Abstract:

Fiber reinforced polymer (FRP) reinforcing bars for concrete structure has been extensively investigated for last two decades and a number of FRP bars are commercially available. However, one of shortcomings of the existing FRP bars is its low elastic modulus, if glass fibers are used (i.e., GFRP). The main objective of this study using the concept of material hybridization is to develop a viable hybrid FRP bar for concrete structures, especially for marine and port con- crete structures. The purposes of hybridization are to increase the elastic modulus of GFRP bar with acceptable tensile strength. Two types of hybrid GFRP bar were considered in the development: GFRP crust with steel core and GFRP bar with steel wires dispersed over the cross-section. Using E-glass fibers and unsaturated polyester resins, the hybrid GFRP bar samples of 13 mm in diameter were pultruded and tested for tensile properties. The effect of hybridization on tensile properties of GFRP bars was evaluated by comparing the results of tensile test with those of non-hybrid GFRP bars. The results of this study indicated that the elastic modulus of the hybrid GFRP bar was increased by up to 270 percent by the material hybridization. The results of the test and the future recommendations are summarized in this paper. To ensure long-term durability of the hybrid GFRP bars in waterfront structure applications, the individual and combined effects of environmental conditions on hybrid GFRP rebar itself as well as on the interface between rebar and concrete should be accessed.

Experimental Study on the Mechanical Properties of FRP Bars by Hybridizing with Steel Wires  [PDF]
Ji-Hyun Hwang, Dong-Woo Seo, Ki-Tae Park, Young-Jun You
Engineering (ENG) , 2014, DOI: 10.4236/eng.2014.67039
Abstract:

Many studies on fiber reinforced polymer composite bars, as a substitute for reinforcing bars, have been conducted to solve corrosion of steel in reinforced concrete structures since 1960s’. However, FRP Bars have a lower elastic modulus than steel rebar as a structural component of concrete structures. Material properties with brittleness fracture and low elastic modulus can be improved by combining cheaper steel than carbon or aramid fibers. In this study, prototypes of FRP Bars with inserted steel wires (i.e., “FRP Hybrid Bars”) were developed and their tensile performance was compared depending on the proportion and diameter of steel. The FRP Hybrid Bars were made by dividing them into D13 and D16 according to the diameter and proportion of inserted wires: GFRPs were combined with wires having different diameters of 0.5 mm, 1.0 mm, and 2.0 mm in the proportion of 10%, 30%, 50%, and 70%, respectively. As a result of tensile tests, the elastic modulus of FRP Hybrid Bars were improved as 20% - 190% in comparison with the fully GFRP Bars.

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