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- 저자 : ( Sang-hyoun Kim ) (검색결과 1,063 건)
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동씨침(董氏鍼)의 경항통(頸項痛) 치료(治療)에 관한 임상적(臨床的) 고찰(考察)
이채우,조태성,박인범,김상우,안창범,송춘호,윤현민,장경전,Lee, Chae-woo,Cho, Tai-Sung,Park, In-beohm,Kim, Sang-woo,Ahn, Chang-beohm,Song, Choon-ho,Youn, Hyoun-min,Jang, Kyung-jeon 대한침구의학회 2003 대한침구의학회지 Vol.20 No.2
Objective : The purpose of this study was to evidence the effect of Dong-Shi Acupuncture by improving degree of forty four patients who have received a Dong-Shi Acupuncture therapy at Dong Eui oriental hospital OPD and chiefly complained for neck pain and related symptoms. Materials and Methods: Forty four patients were diagnosed with physical inspection and radiography, and investigated into the effect of treatment sharing before treatment and after 2 weeks and 4 weeks treatment by Dr. Kim's method. Results and Conclusions: The conclusion of this study was that improving degree of forty four patients who have received a Dong-Shi acupuncture therapy for all items and excellence of the Dong-Shi Acupuncture was evidenced.
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Kim, Kyung Rok,Park, Sang Ho,Kim, Hyoun Sook,Rhee, Kyung Hee,Kim, Byung-Gyu,Kim, Dae Gyu,Park, Mi Seul,Kim, Hyun-Jung,Kim, Sunghoon,Han, Byung Woo Blackwell Publishing Ltd 2013 Proteins Vol.81 No.10
<P>Human cytosolic aspartyl-tRNA synthetase (DRS) catalyzes the attachment of the amino acid aspartic acid to its cognate tRNA and it is a component of the multi-tRNA synthetase complex (MSC) which has been known to be involved in unexpected signaling pathways. Here, we report the crystal structure of DRS at a resolution of 2.25 Å. DRS is a homodimer with a dimer interface of 3750.5 Å<SUP>2</SUP> which comprises 16.6% of the monomeric surface area. Our structure reveals the C-terminal end of the N-helix which is considered as a unique addition in DRS, and its conformation further supports the switching model of the N-helix for the transfer of tRNA<SUP>Asp</SUP> to elongation factor 1α. From our analyses of the crystal structure and post-translational modification of DRS, we suggest that the phosphorylation of Ser146 provokes the separation of DRS from the MSC and provides the binding site for an interaction partner with unforeseen functions.</P>
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Kim, Dong-Hoon,Kim, Sang-Hyoun,Kim, Ku-Yong,Shin, Hang-Sik Elsevier 2010 International journal of hydrogen energy Vol.35 No.4
<P><B>Abstract</B></P><P>A pilot-scale H<SUB>2</SUB>-producing anaerobic sequencing batch reactor (ASBR) treating food waste was operated. During the operation, the carbon/nitrogen (C/N) ratio was adjusted from 10 to 30 by changing the composition of the food waste. When the C/N ratio was lower than 20, the H<SUB>2</SUB> yield was maintained at around 0.5mol H<SUB>2</SUB>/mol hexose<SUB>added</SUB>, accounting for 2.3% of energy conversion efficiency contained in food waste to H<SUB>2</SUB>, but it gradually dropped at higher C/N ratios. The low performance was accompanied by increased production of lactate, propionate, and valerate. In order to recover the performance, alkaline shock (pH 12.5 for 1day) was imposed on the entire mixed liquor in the fermenter. This alkaline shock method was so effective that the H<SUB>2</SUB> yield significantly increased to over 0.9mol H<SUB>2</SUB>/mol hexose<SUB>added</SUB>, and was then stabilized at 0.69mol H<SUB>2</SUB>/mol hexose<SUB>added</SUB>. In addition, the settling characteristics of H<SUB>2</SUB>-producing ASBR, which was separated into three layers, were investigated. Ribonucleic acid (RNA) as well as volatile suspended solid concentrations of each layer were measured to suggest how to enhance the H<SUB>2</SUB> production in ASBR operation.</P>
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Tunable Bandgap Narrowing Induced by Controlled Molecular Thickness in 2D Mica Nanosheets
Kim, Sang Sub,Khai, Tran Van,Kulish, Vadym,Kim, Yoon-Hyun,Na, Han Gil,Katoch, Akash,Osada, Minoru,Wu, Ping,Kim, Hyoun Woo American Chemical Society 2015 Chemistry of materials Vol.27 No.12
<P>Bandgap engineering of atomically thin 2D crystals is critical for their applications in nanoelectronics, optoelectronics, and photonics. Here, we report a simple but rather unexpected approach for bandgap engineering of muscovite-type mica nanosheets (KAl<SUB>3</SUB>Si<SUB>3</SUB>O<SUB>10</SUB>(OH)<SUB>2</SUB>) via controlled molecular thickness. Through density functional calculations, we analyze electronic structures in 2D mica nanosheets and develop a general picture for tunable bandgap narrowing induced by controlled molecular thickness. From conducting atomic force microscopy, we observe an abnormal bandgap narrowing in 2D mica nanosheets, contrary to well-known quantum size effects. In mica nanosheets, decreasing the number of layers results in reduced bandgap energy from 7 to 2.5 eV, and the bilayer case exhibits a semiconducting nature with ∼2.5 eV. Structural modeling by transmission electron microscopy and density functional calculations reveal that this bandgap narrowing can be defined as a consequence of lattice relaxations as well as surface doping effects. These bandgap engineered 2D mica nanosheets open up an exciting opportunity for new physical properties in 2D materials and may find diverse applications in 2D electronic/optoelectronic devices.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/cmatex/2015/cmatex.2015.27.issue-12/cm504802j/production/images/medium/cm-2014-04802j_0006.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/cm504802j'>ACS Electronic Supporting Info</A></P>
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Kim, Jae-Hun,Mirzaei, Ali,Kim, Hyoun Woo,Kim, Sang Sub Elsevier 2018 APPLIED SURFACE SCIENCE - Vol.445 No.-
<P><B>Abstract</B></P> <P>In this study, a novel micro-nano hierarchical fluorinated Ag/SiO<SUB>2</SUB> structure having both superhydrophobic and superoleophobic properties is presented. SiO<SUB>2</SUB> layers with microscale roughness were fabricated using a combination of sol-gel and electrospraying processes. Nanoparticles of silver were deposited on SiO<SUB>2</SUB> using a UV reduction method; subsequent fluorination treatment resulted in micro-nano hierarchical fluorinated Ag/SiO<SUB>2</SUB> layers. The micro-nano hierarchical fluorinated Ag/SiO<SUB>2</SUB> layers have outstanding repellency towards different liquids including water, with a water contact angle of 170° and sliding angle of 1°. This demonstrated the excellent superhydrophobic nature of the micro-nano hierarchical structures. Long-term durability, durability of ex-situ and in-situ fluorinated Ag/SiO<SUB>2</SUB> layers in harsh environments, and ultraviolet resistance of the superhydrophobic fluorinated Ag/SiO<SUB>2</SUB> layers were studied. Thermal stability studies showed that the superhydrophobic properties were retained even at 400 °C for 10 h, indicating the good thermal resistance of the fluorinated Ag/SiO<SUB>2</SUB>. Finally, the fluorinated Ag/SiO<SUB>2</SUB> structure showed outstanding superoleophobicity (contact angle of 158°) towards mineral oil, which demonstrates the superamphiphobic nature of the micro-nano hierarchical fluorinated Ag/SiO<SUB>2</SUB> structures. Such superamphiphobic fluorinated Ag/SiO<SUB>2</SUB> layers can be used to produce self-cleanable, anti-fogging, anti-bacterial, anti-reflection, and anti-icing surfaces.</P> <P><B>Highlights</B></P> <P> <UL> <LI> The novel micro-nano hierarchical Ag/SiO<SUB>2</SUB> layers were prepared. </LI> <LI> Effects of UV light, fluorination, thermal stability and durability were studied. </LI> <LI> The fabricated layers demonstrated both superhydrophobicity and superoleophobicity. </LI> <LI> The fabricated layers showed good thermal stability and high durability in harsh environments. </LI> <LI> The fabricated layers can be used for advanced applications such as self-cleanable surfaces. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
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Kim, Sang‐,Bok,Jo, Ji‐,Hoon,Lee, Sung‐,Mi,Kim, Hyoun‐,Ee,Shin, Kwan‐,Ha,Koh, Young‐,Hag Wiley Subscription Services, Inc., A Wiley Company 2013 Journal of biomedical materials research. Part A Vol.101 No.6
<P><B>Abstract</B></P><P>This study investigated the utility of poly(ether imide) (PEI) coating for improving the corrosion resistance and biocompatibility of magnesium (Mg) implants for orthopedic application. In particular, the microstructure of the PEI coating layers was controlled by the adjustment of the temperature used to dry the spin‐coated wet PEI films. When a wet PEI film was dried at 4°C, a relatively thick and porous coating layer was achieved as a result of an extensive exchange of the solvent with water in a moist environment. In contrast, when a wet PEI film was dried at 70°C, a relatively thin and dense layer was created due to the faster evaporation of the solvent with a negligible exchange of the solvent with water. The porous PEI coating layer showed higher stability than did the dense one when immersed in a simulated body fluid (SBF), which was presumably attributed to the formation of chemical bonding between the PEI and the Mg substrate. Both the porous and the dense PEI coated Mg specimens showed significantly improved <I>in vitro</I> biocompatibility, which were assessed in terms of cell attachment, proliferation and differentiation. However, interestingly, the dense PEI coating layer showed greater cell proliferation and differentiation than did the porous layer. © 2012 Wiley Periodicals, Inc. J Biomed Mater Res Part A, 2013.</P>
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