http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
제갈덕주(Deok Ju Jegal) 언어과학회 2014 언어과학연구 Vol.0 No.69
The Purpose of this study is to examine the general structure of polysemy and facets. Polysemous words are understood that one lexeme has many sememe. But in recent years, A study about facets and multi-faceted words have been conducted by Cruse(1995), Lim Ji-Ryong(2011) etc. Lim Ji-Ryong(2011) argues that Korean words consist of 3 types. They are monosemous, polysemous, and faceted words. In this paper, I will also accept such an opinion. But I don`t agree that facets are a kind of a word type. I think that polysemy and facets are a kind of characters on a word. So In Jegal Deok-Ju(2013), I have argued that. And In this paper, I will examine the structure where polysemy and facts coexist. To achieve this, this study will be based on Ogden·Richards(1923).
Jegal, J. H.,Choi, G. H.,Lee, H. J.,Kim, K. D.,Lee, S. C. THE POLYMER SOCIETY OF KOREA 2016 Macromolecular Research Vol.24 No.1
<P>We describe a novel approach for surface engineering of titanium (Ti) with polymer nanoparticles that can sustainably release an osteogenic compound, simvastatin (SV). The SV-loaded nanoparticles (SV-GC-CA) were prepared by self-assembly of 5 beta-cholanic acid-conjugated glycol chitosan (GC-CA) in the presence of SV. Dynamic light scattering (DLS) and transmission electron microscopy (TEM) analyses showed that the SV-GC-CA nanoparticles had a hydrodynamic diameter of 371.4 nm with a spherical shape. The surface engineering of Ti was performed by pre-treatment of Ti surface with polydopamine (PD) coatings, followed by immobilization of the SV-GC-CA nanoparticles. The immobilization of the SV-GC-CA nanoparticles onto PD-treated Ti surfaces could be achieved by a simple dipping method in an aqueous solution. The successful immobilization of the SV-GC-CA nanoparticles onto Ti surfaces was confirmed by field-emission scanning electron microscopy (FE-SEM), and the density of immobilized nanoparticles could be controlled. SV was sustainably released for up to 20 days, and the release rate was dependent on the loading amount of SV. The Ti substrate functionalized with SV-releasing nanoparticles significantly promoted alkaline phosphatase (ALP) activity of osteoblast-like cells (MC3T3-E1). The surface engineering approach described in this work has an applicability for various medical devices to generate surfaces with improved osteogenic potentials.</P>
Tyrosinase inhibitory flavonoid from <i>Juniperus communis</i> fruits
Jegal, Jonghwan,Park, Sang-a,Chung, KiWung,Chung, Hae Young,Lee, Jaewon,Jeong, Eun Ju,Kim, Ki Hyun,Yang, Min Hye Informa UK (TaylorFrancis) 2016 Bioscience, biotechnology, and biochemistry Vol.80 No.12
<P>The fruits of Juniperus communis have been traditionally used in the treatment of skin diseases. In our preliminary experiment, the MeOH extract of J. communis effectively suppressed mushroom tyrosinase activity. Three monoflavonoids and five biflavonoids were isolated from J. communis by bioassay-guided isolation and their inhibitory effect against tyrosinase was evaluated. According to the results of all isolates, hypolaetin 7-O--xylopyranoside isolated from J. communis exhibited most potent effect of decreasing mushroom tyrosinase activity with an IC50 value of 45.15M. Further study provided direct experimental evidence for hypolaetin 7-O--D-xylopyranoside-attenuated tyrosinase activity in -MSH-stimulated B16F10 murine melanoma cell. Hypolaetin 7-O--D-xylopyranoside from the EtOAc fraction of J. communis was also effective at suppressing -MSH-induced melanin synthesis. This is the first report of the enzyme tyrosinase inhibition by J. communis and its constituent. Therapeutic attempts with J. communis and its active component, hypolaetin 7-O--D-xylopyranoside, might be useful in treating melanin pigmentary disorders.</P>
Implementation of three-phase four-leg inverter using SiC MOSFET for UPS applications
Jegal, Jun-Hyeok,Kwon, Minho,Oh, Chang-Yeol,Kim, Kiryong,Lee, Jong-Pil The Korean Institute of Power Electronics 2021 JOURNAL OF POWER ELECTRONICS Vol.21 No.1
This study implemented a 30 kW, 750 V<sub>dc</sub>, silicon-carbide (SiC)-based uninterruptible power supply(UPS) applied it on a three-phase four-leg inverter. For component selection, LC filter and DC-link capacitor were designed based on the PSIM simulation. SiC MOSFET was used to achieve higher efficiency and better reliability than the conventional Si IGBT-based UPS applications. Furthermore, desaturation (DeSat) protection method was applied to protect the overcurrent during the short-circuit condition of SiC MOSFET. Thus, the DeSat protection method was applied to SiC MOSFET, thereby enabling a 1 ㎲ protection by complementally switching and zener diode voltage optimization. Accordingly, the transient time of the DeSat protection can be disregarded, thereby enabling fast protection. Meanwhile, several topologies have been studied for unbalanced loads compensation. The current research used a three-phase four-leg inverter topology for compactness and neutral current control. In addition, voltage compensation became possible even in unbalanced load condition by introducing a dual-loop controller for the three-phase four-leg inverter. A dual-loop controller comprises PR and PI controllers to the stationary αβo and synchronous dqo reference frames, respectively. Thermal and efficiency tests were also performed in the rated power test. Under a 30 kW load condition, the surface epoxy molding compound temperature of SiC MOSFET was approximately 72 ℃, and the highest efficiency was approximately 99.1% under 10 kW load condition. Finally, the effectiveness of the implementation was demonstrated through the experiment results.
The Utility of a Three-Dimensional Approach with T-Shaped Osteotomy in Osseous Genioplasty
Jegal, Jung Jae,Kang, Seok Joo,Kim, Jin Woo,Sun, Hook Korean Society of Plastic and Reconstructive Surge 2013 Archives of Plastic Surgery Vol.40 No.4
Background Facial beauty depends on the form, proportion, and position of various units of the face. In terms of the frontal view and facial profile, the chin is the most prominent aesthetic element of the lower third of the face. Many methods have been implemented to obtain good proportions of the lower face. In this study, we applied the T-shaped genioplasty method to correcting chin deformities. Methods All of the procedures in 9 cases were performed under general anesthesia. For genioplasty, a horizontal cutting line and 1 or 2 vertical cutting lines were drawn 5 mm below the mental foramen. Osteotomed bone segments of the chin were used for horizontal widening using bone grafts or for horizontal shortening. Likewise, they were used as bone grafts for vertical lengthening or vertical shortening. The bone segments were approximated in the midline and held in place using miniplates. Results The postoperative appearance of the 9 cases showed that the lower third of the face had been naturally changed. At the same time, vertical lengthening or shortening, and horizontal widening or shortening could be implemented during the operation. Satisfactory results were obtained based on reviews of the patients' preoperative and postoperative photographs. The patients were also satisfied with the outcomes. Conclusions Using T-shaped genioplasty, we efficiently adjusted the shape and position of the chin to obtain good proportions of the lower face and change its contour to obtain an aesthetically appealing oval face in accordance with East Asians' aesthetic preferences.
Jegal, Hyuk,Jun, Hyun Ju,Kim, Ki Jong International Academy of Physical Therapy Research 2015 Journal of International Academy of Physical Ther Vol.6 No.1
The purpose of this study was to investigate the relationship the quality of life, osteoarthritis and osteoporosis in the Republic of Korea. This study was utilized raw data from the 2010 KCHS. In total, 229,229 individuals participated in the 2010 survey. The final analysis was identified 22,545 individuals who had been diagnosed by a doctor with arthritis or osteoporosis. To identify the relationship between the quality of life - related after treated or treating of arthritis, osteoporosis, A multiple linear regression analysis was performed. Treating group for osteoarthritis of their quality of life has statistically been less than after treated group(B=-.068, p<.001). Treating group for osteoporosis of their quality of life has statistically been less than after treated group(B=-.083, p<.001). Non-treatment group who was diagnosed by doctor, but no treated subject for osteoarthritis of their quality of life has statistically been less than after treated group(B=-.075, p<.001). Non-treatment group that was diagnosed by doctor, but no treated subject for osteoporosis of their quality of life has statistically been less than after treated group(B=-.045, p<.001). Non-treatment group who was diagnosed by doctor, but no treated subject for osteoporosis and arthritis of their quality of life has statistically been less than after treated group(B=-.0121, p<.001). as a result of those data, we understand that the decision maker for treatment has been chosen by quality of life, including pain, mobility activity and so on.
Eupatilin induces Sestrin2-dependent autophagy to prevent oxidative stress
Jegal, K. H.,Ko, H. L.,Park, S. M.,Byun, S. H.,Kang, K. W.,Cho, I. J.,Kim, S. C. Springer Science + Business Media 2016 Apoptosis Vol.21 No.5
<P>Eupatilin (5,7-dihydroxy-3,4,6-trimethoxyflavone) has many pharmacological activities including anti-inflammation, anti-oxidant and anti-cancer effects. Autophagy is the basic cellular machinery involving the digestion of damaged cellular components. In the present study, we investigated the protection effects of eupatilin against arachidonic acid (AA) and iron-induced oxidative stress in HepG2 cells and tried to elucidate the molecular mechanisms responsible. Eupatilin increased cell viability against AA + iron in a concentration-dependent manner and prevented mitochondrial dysfunction and reactive oxygen species (ROS) production. In addition, AA + iron increased the levels of pro-apoptotic proteins and these changes were prevented by eupatilin. Eupatilin also induced autophagy, as evidenced by the accumulation of microtubule-associated protein 1 light chain3-II and the detection of autophagic vacuoles. Furthermore, the protective effects of eupatilin on mitochondrial dysfunction and ROS production were significantly abolished by autophagy inhibitors. Eupatilin also increased the mRNA level of sestrin-2 and its promoter-driven reporter gene activity, which resulted in the up-regulation of sestrin-2 protein. Finally, gene silencing using sestrin-2 siRNA and the ectopic expression of recombinant adenoviral sestrin-2 indicated that sestrin-2 induction by eupatilin was required for autophagy-mediated cytoprotection against AA + iron. Our results suggest that eupatilin activates sestrin-2-dependent autophagy, thereby preventing oxidative stress induced by AA + iron.</P>