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Park, Sang Mi,Lee, Tae Hoon,Zhao, Rongjie,Kim, Youn Sook,Jung, Ji Yun,Park, Chung A.,Jegal, Kyung Hwan,Ku, Sae Kwang,Kim, Jae Kwang,Lee, Chul Won,Kim, Young Woo,Cho, Il Je,An, Won G.,Kim, Sang Chan D.A. Spandidos 2018 International journal of molecular medicine Vol.41 No.5
<P>Socheongryong-Tang (SCRT) is a natural medicine prescription that has been mainly used in East Asia for the treatment of inflammatory disorders, including asthma and allergic rhinitis. The present study evaluated the anti-inflammatory effects of SCRT on lipopolysaccharide (LPS)-stimulated RAW 264.7 cells and in a rat model of carrageenan (CA)-induced paw edema. Levels of tumor necrosis factor-α (TNF-α), interleukin (IL)-1β, IL-6 and prostaglandin E<SUB>2</SUB> (PGE<SUB>2</SUB>) in the culture supernatant were quantified and nitric oxide (NO) production was monitored. In addition, the effect of SCRT on the protein expression of nuclear factor-κB (NF-κB), mitogen-activated protein kinases (MAPKs), inducible NO synthase (iNOS) and cyclooxygenase-2 (COX-2) was assessed by western blot analysis. Furthermore, the effects of SCRT on acute inflammation <I>in vivo</I> and changes in the histomorphometry and histopathology of paw skin were observed using CA-treated rats. SCRT (1 mg/ml) inhibited the LPS-induced changes in the protein expression of NF-κB, JNK, ERK1/2, iNOS and COX-2, as well as the production of NO, PGE<SUB>2</SUB> and cytokines. In the rat paw edema assay, administration of 1 g/kg of lyophilized powder obtained from the aqueous extracts of SCRT for 3 consecutive days inhibited the CA-induced increases in skin thickness, mast cell degranulation, and infiltration of inflammatory cells in the ventral and dorsal pedis skin within 4 h. These results demonstrated that SCRT exerts its anti-inflammatory activities in LPS-stimulated RAW 264.7 cells through decreasing the production of inflammatory mediators, including PGE<SUB>2</SUB>, NO and cytokines, via suppression of the NF-κB and JNK and ERK1/2 signaling pathways. In addition, the data of the CA-induced paw edema indicated an anti-edema effect of SCRT. SCRT (1 g/kg) reduced acute edematous inflammation through inhibition of mast cell degranulation and infiltration of inflammatory cells. Therefore, the present study provided scientific evidence for the anti-inflammatory activities of SCRT as well as the underlying mechanisms.</P>
LPS로 유도한 RAW 264.7 세포의 염증반응에서 자초(紫草)의 항염증 효과
최선복 ( Sun Bok Choi ),배기상 ( Gi Sang Bae ),조일주 ( Il Joo Jo ),박경철 ( Kyoung Chel Park ),서승희 ( Seung Hee Seo ),김동구 ( Dong Goo Kim ),신준연 ( Joon Yeon Shin ),곽태신 ( Tae Sin Gwak ),이정현 ( Jung Hyun Lee ),이금산 ( G 대한본초학회 2013 大韓本草學會誌 Vol.28 No.2
Objective: Lithospermum Erythrorhizon (LE) has been used as an anti-bacterial and anti-inflammatory agent. However, it is unclear that LE aqueous extract could show the anti-inflammatory effects in RAW 264.7cells. The purpose of this study was to investigate the anti-inflammatory effect of aqueous extract from LE on lipopolysaccharide (LPS) - induced inflammatory response. Methods: To measure out the cytotoxicity of LE, we performed the MTT assay. To evaluate the anti-inflammatory effects of LE, we examined the inflammatory mediators such as nitric oxide (NO), prostaglandin E2 (PGE2) and pro-inflammatory cytokines (tumor necrosis factor (TNF)-a, interleukin, (IL)-1β and (IL)-6) on RAW 264.7 cells. We also examined molecular mechanisms such as mitogen-activated protein kinases (MAPKs) and nuclear factor-B (NF-κB) activation by western blot. Results : Aqueous Extract from LE itself did not have any cytotoxic effect in RAW 264.7 cells. Aqueous extract from LE inhibited LPS-induced productions of inflammatory mediators such as NO, PGE2, and pro-inflammatory cytokines including TNF-a, IL-1β and IL-6 in RAW 264.7cells. In addition, LE inhibited the phosphorylation of p38 kinases (p38), c-Jun NH2-terminal kinase (JNK), and NF-κB activation in RAW 264.7 cells. Conclusion : LE down-regulated LPS-induced production of inflammatory mediators through the inhibition of p38, JNK and NF-κB activation. Taken together, these results could provide the evidence for the anti-inflammatory effects of LE. Therefore, LE may be a novel target in the management of inflammation and help to support a potential strategy for prevention and therapy of inflammatory diseases.
Ngo, Duc Tung,Le, Hang T. T.,Kim, Chanhoon,Lee, Jae-Young,Fisher, John G.,Kim, Il-Doo,Park, Chan-Jin The Royal Society of Chemistry 2015 ENERGY AND ENVIRONMENTAL SCIENCE Vol.8 No.12
<P>Electrode materials with three-dimensional (3D) mesoporous structures possess superior features, such as a shortened solid-phase lithium diffusion distance, a large pore volume, full lithium ion accessibility, and a high specific area, which can facilitate fast lithium ion transport and electron transfer between solid/electrolyte interfaces. In this work, we introduce a facile synthesis route for the preparation of a 3D nanoarchitecture of Ge coated with carbon (3D-Ge/C) <I>via</I> a carbothermal reduction method in an inert atmosphere. 3D-Ge/C showed excellent cyclability: almost 86.8% capacity retention, corresponding to a charge capacity of 1216 mA h g<SUP>−1</SUP> even after 1000 cycles at a 2C-rate. Surprisingly, the high average reversible capacity of 1122 mA h g<SUP>−1</SUP> was maintained at a high charge rate of 100C (160 A g<SUP>−1</SUP>). Even at an ultrahigh charge rate of 400C (640 A g<SUP>−1</SUP>), an average capacity of 429 mA h g<SUP>−1</SUP> was attained. Further, the full cell composed of a 3D-Ge/C anode and an LiCoO<SUB>2</SUB> cathode exhibited excellent rate capability and cyclability with 94.7% capacity retention over 50 cycles. 3D-Ge/C, which offers a high energy density like batteries as well as a high power density like supercapacitors, is expected to be used in a wide range of electrochemical devices.</P> <P>Graphic Abstract</P><P>A novel, facile synthetic route has been proposed to prepare a 3D nanoarchitecture of Ge coated with carbon (3D-Ge/C) <I>via</I> carbothermal reduction. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c5ee02183a'> </P>
Highly porous coral-like silicon particles synthesized by an ultra-simple thermal-reduction method
Ngo, Duc Tung,Le, Hang T. T.,Pham, Xuan-Manh,Jung, Ji-Won,Vu, Ngoc Hung,Fisher, John G.,Im, Won-Bin,Kim, Il-Doo,Park, Chan-Jin The Royal Society of Chemistry 2018 Journal of materials chemistry. A, Materials for e Vol.6 No.6
<P>Porous Si is considered a potential anode material for next-generation Li-ion batteries (LIBs) because of its high specific capacity, low lithiation/delithiation potential, low cost, and environmental friendliness. In this work, we introduce a simplified Mg-thermal-reduction method for the production of mass-scalable coral-like bulk-Si powder with a high surface area (38 m<SUP>2</SUP> g<SUP>−1</SUP>), broad pore-size distribution (2-200 nm), and 3-dimensionally (3D) interconnected Si structure for application in LIBs. The porous, coral-like Si electrode delivered a high reversible capacity of 2451 mA h g<SUP>−1</SUP>, corresponding to ∼70% of the theoretical capacity of Si, at a rate of C/10. After 100 cycles, the porous, coral-like Si electrode maintained a capacity of 1956 mA h g<SUP>−1</SUP>, corresponding to 79.8% of the initial reversible capacity. Importantly, a reasonably high reversible capacity of 614 mA h g<SUP>−1</SUP> was achieved even at a high rate of 10C. These outstanding results demonstrate that the 3D-networked, porous, coral-like Si powder, synthesized <I>via</I> a NaCl-assisted Mg-thermal-reduction process on a stainless-steel plate over a period of one minute, can be employed as a promising anode material for the next generation of high-energy LIBs.</P>
Ryu, BoMi,Choi, Il-Whan,Qian, Zhong-Ji,Heo, Soo-Jin,Kang, Do-Hyung,Oh, Chulhong,Jeon, You-Jin,Jang, Chul Ho,Park, Won Sun,Kang, Kyong-Hwa,Je, Jae-Young,Kim, Se-Kwon,Kim, Young-Mog,Ko, Seok-Chun,Kim, G The Korean Society of Phycology 2014 ALGAE Vol.29 No.4
Despite the extensive literature on marine algae over the past few decades, a paucity of published research and studies exists on red algae. The purpose of this study was to evaluate the potential therapeutic properties of the ethanol extract of the red alga Callophyllis japonica against lipopolysaccharide (LPS)-stimulated macrophage inflammation. The C. japonica extract (CJE) significantly inhibited the nitric oxide (NO) production and the induced dose-dependent reduction of the protein and mRNA levels of inducible nitric oxide synthase and cyclooxygenase-2. Additionally, the CJE reduced the mRNA levels of inflammatory cytokines, including tumor necrosis factor-${\alpha}$, interleukin (IL)-$1{\beta}$, and IL-6. We investigated the mechanism by which the CJE inhibits NO by examining the level of mitogen-activated protein kinases (MAPKs) activation, which is an inflammation-induced signaling pathway in macrophages. The CJE significantly suppressed the LPS-induced phosphorylation of c-Jun N-terminal kinase, extracellular signal-regulated kinase and p38 MAPK. Taken together, the results of this study demonstrate that the CJE inhibits LPS-induced inflammation by blocking the MAPK pathway in macrophages.
다형성교아세포종을 동반한 Von Recklinghausen氏 병 1예
이현개,이종수,백민우,이승재,박효일,지제근 인제대학교 1981 仁濟醫學 Vol.2 No.4
가족성으로 신경섬유종증에 동반되는 중추신경계의 종양으로 수막종, 신경교종, 신경초종 등이 있으며 이들은 드물지 않게 보고되었다. 그러나 신경교세포에 생기는 종양 중 신경섬유종증에 동반되어 대뇌에 생긴 다형성교아세포종은 매우 드물다. 본 교실에서 가족성으로 발생한 신경섬유종증의 환자에 동반된 다형성교아세포종을 경험하였으며 가족중 부친은 von Recklinghausen씨 병을, 또 두 자녀는 다발성 cafe´ au lait spots를 가지고 있었다. The tumors of the central nervous system associated with familial neurofibromatosis are meningioma, glioma, and neurilemmoma, which are not uncommon. Of the glial tumors of the central nervous system, the association of cerebral glioblastoma multiforme with neurofibro matosis is very rare. We have experienced the unusual coincidence of neurofibromatosis and glioblastoma multiforme in a 33 year old man, whose father was afflicted with von Recklinghausen's disease and whose son and daughter had also multiple cafe´ au lait spots on their bodies.
UV/O₃와 O₃로 처리된 ITO의 표면 특성과 OLED 소자 특성
김일(IL Kim),유도현(D.H. You),박구범(G.B. Park),육재호(J.H. Yuk),박종관(J.K. Park),조기선(G.S. Jo),이덕출(D.C. Lee) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
In this research We investigated the effect of UV/O₃, O₃ treatments of indium-tin oxide(ITO) surface on the performance of organic light emitting devices(OLEDs). The fundamental structure of OLEDs was ITO(anode) / TPD(Hole Transport Layer) / Alq₃ / Al(cathode). We performed UV/O₃, O₃ treatments and found that both treatments enhanced the performance of OLEDs. Current-Voltage, Luminance-Voltage characteristics were measured at room temperature.
Progress of physics studies in the Hanbit mirror device
kwang-il You,A. C. England,B. H. Park,D. C. Seo,D. K. Lee,H. G. Jhang,H. K. Na,J. Chung,J. G. Bak,J. H. Lee,J. H. Yeom,J. S. Hong,K. K. Choh,M. K. Park,S. G. Lee,S. H. Seo,S. J. Yoo,S. S. Kim,S. W. Yo 한국물리학회 2006 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.49 No.III
The Hanbit is a complex mirror device that has a slot and a double half-turn antennas in the central cell to launch high power ion cyclotron resonance frequency range waves for plasma production, heating, and stabilization. However, there is no other device, such as a neutral beam injector, to heat the plasma ions. Hanbit also has three low-power supplies to launch electron cyclotron resonance frequency range waves for heating electrons. Under these circumstances, the main physics study in the Hanbit device has been devoted to RF-wave and plasma interaction studies, including MHD stabilization by using only the RF waves. In this paper, we briefly report the main results of the RF-heating research, MHD stability studies and discharge analysis during the past few years, as well as the future plans.