http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Choi, Dukhyun,Choi, Min-Yeol,Choi, Won Mook,Shin, Hyeon-Jin,Park, Hyun-Kyu,Seo, Ju-Seok,Park, Jongbong,Yoon, Seon-Mi,Chae, Seung Jin,Lee, Young Hee,Kim, Sang-Woo,Choi, Jae-Young,Lee, Sang Yoon,Kim, Jo WILEY-VCH Verlag 2010 ADVANCED MATERIALS Vol.22 No.19
<B>Graphic Abstract</B> <P>The cover shows an image of fully rollable transparent nanogenerators synthesized using chemical vapor deposition grown large-scale graphene sheets as transparent electrodes and piezoelectric ZnO nanorod arrays. Sang-Woo Kim, Jae-Young Choi, and co-workers report on p. 2187 the electrical and structural stability of the nanogenerators, with excellent charge scavenging performance under external mechanical loads such as bending and rolling. This study shows that graphene-based nanogenerators are very promising for self-powered rollable transparent device applications. <img src='wiley_img_2010/09359648-2010-22-19-ADMA201090066-content.gif' alt='wiley_img_2010/09359648-2010-22-19-ADMA201090066-content'> </P>
남세현,Chong-hai Lee1,Yu-wei Tang,Yuan-sheng Liu,Ki-chul Kim,Sang-yeol Chun,염유림,Hyung chang Kim,Myoung-deok Lee 대한한의학회 2015 대한한의학회지 Vol.36 No.4
The purpose of this report is to evaluate effect of Korean medical treatment on idiopathic gonadotropin-dependent precocious puberty (G-DPP) patient received herbal medicine. We administered Aesopjiyoun-tang remedy to idiopathic G-DPP and analyzed the delay effect by hormonal value and radiographs; the height growth effect by measurement of height. After Korean medical treatment, suppression effect to peak- Luteinizing Hormone level (LHL) is 14.39IU/L to 10.9IU/L for 13month, growth effect to height value is 11cm/13month; and change of mean growth velocity (MGV) is 6.08cm/year to 10.06cm/year. The gain in height by treatment is 3.98cm/year. The result suggests Aesopjiyoun-tang can be an effective treatment for G-DPP. Herbal medicine can be used as an alternative treatment in place of the GnRH treatment.
Global Regulation of Plant Immunity by Histone Lysine Methyl Transferases
Lee, Sanghun,Fu, Fuyou,Xu, Siming,Lee, Sang Yeol,Yun, Dae-Jin,Mengiste, Tesfaye American Society of Plant Biologists 2016 The Plant cell Vol.28 No.7
<P>Posttranslational modification of histones modulates gene expression affecting diverse biological functions. We showed that the Arabidopsis thaliana histone methyl transferases SET DOMAIN GROUP8 (SDG8) and SDG25 regulate pep1-, flg22-, and effector-triggered immunity as well as systemic acquired resistance. Genome-wide basal and induced transcriptome changes regulated by SDG8 and/or SDG25 showed that two genes of the SDG-dependent transcriptome, CAROTENOID ISOMERASE2 (CCR2) and ECERIFERUM3 (CER3), were also required for plant immunity, establishing mechanisms in defense functions for SDG8 and SDG25. CCR2 catalyzes the biosynthesis of carotenoids, whereas CER3 is involved in the biosynthesis of cuticular wax. SDG8 and SDG25 affected distinct and overlapping global and locus-specific histone H3 lysine 4 (H3K4) and histone H3 lysine 36 (H3K36) methylations. Loss of immunity in sdg mutants was attributed to altered global and CCR2- and CER3-specific histone lysine methylation (HLM). Loss of immunity in sdg, ccr2, and cer3 mutants was also associated with diminished accumulation of lipids and loss of cuticle integrity. In addition, sdg8 and sdg25 mutants were impaired in H2B ubiquitination (H2Bubn) at CCR2, CER3, and H2Bubn regulated R gene, SNC1, revealing crosstalk between the two types of histone modifications. In summary, SDG8 and SDG25 contribute to plant immunity directly through HLM or indirectly through H2Bubn and by regulating expression of plant immunity genes, accumulation of lipids, biosynthesis of carotenoids, and maintenance of cuticle integrity.</P>
Sung, Won-Yong,Ahn, Hyo Min,Oh, Chang-Yeol,Lee, Byoung Kuk The Korean Institute of Electrical Engineers 2018 Journal of Electrical Engineering & Technology Vol.13 No.1
In this paper, the design process and the control method of the power conversion system (PCS) that consists of a bidirectional DC-DC converter and a 3-level T-type inverter for an energy storage system is presented. Especially the design method of the output LCL filter for a 3-lvel T-type inverter without complex mathematical process are proposed. The validity of the control method and design process in this paper are verified through simulation and experimental analysis.
Analysis of Sugar and Pigment Isomers of the Betacyanin in Celosia cristata using HPLC
Lee, Sang Yeol,Byun, Si Myung 慶尙大學校 기초과학연구소 1985 基礎科學硏究所報 Vol.1 No.-
비름과에 속하는 Celosia cristata의 적색색소를 1.2% 아가로오스 젤 전기영동법에 의하여 분리하였다. 분리된 베타시아닌 색소로부터 당을 가수분해 시킨후 HPLC로 분석한 결과, 레드비트로부터 얻은 베타시아닌은 glucose 1가지만을 당성분으로 함유하고 있는데 반하여, Celosia cristata로부터 추출한 베타시아닌은 glucose와 glucuronic acid 2개의 당성분을 함유함을 알 수 있었다. 또한 HPLC를 이용하여 Celosia cristata의 베타시아닌이 지닌 이성질체의 종류를 조사한 결과, 레드비트의 베타시아닌과는 리텐션 타임이 서로 다른 4가지의 베타시아닌 이성질체를 함유하고 있다는 사실을 알았다.
Lee, Yongjae,Choi, Wonjun,Seo, Seungwon,Kim, Hwan-Yeol,Kim, Sung Joong Atomic Energy Society of Japan 2016 Journal of nuclear science and technology Vol.53 No.10
<P>If any severe accident occurs, application of the Severe Accident Management Guidance (SAMG) is initiated by the Technical Support Center (TSC). In order to provide advisory information to the TSC, required safety injection flow rate for maintaining the coolability of the reactor core has been suggested in terms of the depressurization pressure. In this study, mechanistic development of the safety injection flow map was performed by post-processing the core exit temperature (CET) data from MELCOR simulation. In addition, effect of oxidation during the core degradation was incorporated by including simulation data of core water level decrease rate. Using the CET increase rate and core water level decrease rate, safety injection flow maps required for removing the decay and oxidation heat and finally for maintaining the coolability of the reactor core were developed. Three initiating events of small break loss of coolant accidents without safety injection, station black out, and total loss of feed water were considered. Reactor coolant system depressurization pressure targeting the suggested injection flow achievable with one or two high pressure safety injections was included in the map. This study contributes on improving the current SAMG by providing more practical and mechanistic information to manage the severe accidents.</P>
Lee, Young Wook,Han, Sang Woo,Lee, Kang Yeol Elsevier 2018 Materials chemistry and physics Vol.214 No.-
<P><B>Abstract</B></P> <P>In this work, a facile synthetic method for site-selectively Pt-decorated PdPt bimetallic nanosheets (S-Pt-PdPt<SUB>BN</SUB>) has been described. The size, structure, and composition distribution of the synthesized S-Pt-PdPt<SUB>BN</SUB> were determined by transmission electron microscopy, scanning electron microscopy, energy-dispersive X-ray spectroscopy, and X-ray diffraction. The electrocatalytic activity of these bimetallic nanosheets was examined for the oxidation of methanol in an acidic solution. The electrochemically active surface area (ECSA) of S-Pt-PdPt<SUB>BN</SUB> was 0.842 cm<SUP>2</SUP>. This value is slightly lower than the ECSA (1.012 cm<SUP>2</SUP>) of the commercial Pt/C (Alpha, Pt 10%) electrode. Interestingly, even though the ECSA of the S-Pt-PdPt<SUB>BN</SUB>/C was smaller than that of the commercial Pt/C, the forward peak current density of the former (2.95 mA cm<SUP>−2</SUP>) was ca. 1.5 times higher than that of the latter (2.05 mA cm<SUP>−2</SUP>). Moreover, the current density of the S-Pt-PdPt<SUB>BN</SUB>/C catalysts was high even after 800 s of continuous electrocatalysis at 0.5 V. This current density is six times that of commercial Pt/C catalysts. Thus, the synthesized S-Pt-PdPt<SUB>BN</SUB> exhibited significantly enhanced electrocatalytic activity and better stability than the commercial Pt/C catalyst for methanol oxidation.</P> <P><B>Highlights</B></P> <P> <UL> <LI> A synthetic method for site-selectively Pt-decorated PdPt bimetallic nanosheets is described. </LI> <LI> These Pt-decorated PdPt bimetallic nanosheets are excellent electrocatalysts for MeOH oxidation. </LI> <LI> The Pt-decorated PdPt bimetallic nanosheets show enhanced electrocatalytic activity and stability. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Lee, Sang-Yeop,Yun, Sung Ho,Lee, Yeol Gyun,Choi, Chi-Won,Leem, Sun-Hee,Park, Edmond Changkyun,Kim, Gun-Hwa,Lee, Je Chul,Kim, Seung Il Oxford University Press 2014 The Journal of antimicrobial chemotherapy Vol.69 No.6
<P><B>Objectives</B></P><P>To determine the genomic sequence of extensively drug-resistant <I>Acinetobacter baumannii</I> DU202 and to perform proteomic characterization of antibiotic resistance in this strain using genome data.</P><P><B>Methods</B></P><P>The genome sequence of <I>A. baumannii</I> DU202 was determined using the Hi-Seq 2000 system and comparative analysis was performed to determine the unique characteristics of <I>A. baumannii</I> DU202. Previous proteomic results from the cell wall membrane fraction by one-dimensional electrophoresis and liquid chromatography combined with mass spectrometry analysis (1DE-LC-MS/MS), using the <I>A. baumannii</I> ATCC 17978 genome as a reference, were reanalysed to elucidate the resistance mechanisms of <I>A. baumannii</I> DU202 using strain-specific genome data. Additional proteomic data from the cytosolic fraction were also analysed.</P><P><B>Results</B></P><P>The genome of <I>A. baumannii</I> DU202 consists of 3660 genes and is most closely related to the Korean <I>A. baumannii</I> 1656-2 strain. More than 144 resistance genes were annotated in the <I>A. baumannii</I> DU202 genome, of which 72 that encoded proteins associated with antibiotic resistance were identified in the proteomic analysis of <I>A. baumannii</I> DU202 cultured in tetracycline, imipenem and Luria–Bertani broth (control) medium. Strong induction of β-lactamases, a multidrug resistance efflux pump and resistance–nodulation–cell division (RND) multidrug efflux proteins was found to be important in the antibiotic resistance responses of <I>A. baumannii</I> DU202.</P><P><B>Conclusions</B></P><P>Combining genomic and proteomic methods provided comprehensive information about the unique antibiotic resistance responses of <I>A. baumannii</I> DU202.</P>
Lee, Jang Yeol,Kim, Na Young,Shin, Dong Yun,Park, Hee-Young,Lee, Sang-Soo,Joon Kwon, S.,Lim, Dong-Hee,Bong, Ki Wan,Son, Jeong Gon,Kim, Jin Young Springer-Verlag 2017 JOURNAL OF NANOPARTICLE RESEARCH Vol.19 No.3
<P>Transition metals, such as iron (Fe)- or cobalt (Co)-based nanomaterials, are promising electrocatalysts for oxygen reduction reactions (ORR) in fuel cells due to their high theoretical activity and low cost. However, a major challenge to using these metals in place of precious metal catalysts for ORR is their low efficiency and poor stability, thus new concepts and strategies should be needed to address this issue. Here, we report a hybrid aciniform nanostructures of Fe nanofragments embedded in thin nitrogen (N)-doped graphene (Fe@N-G) layers via a heat treatment of graphene oxide-wrapped iron oxide (Fe2O3) microparticles with melamine. The heat treatment leads to transformation of Fe2O3 microparticles to nanosized zero-valent Fe fragments and formation of core-shell structures of Fe nanofragments and N-doped graphene layers. Thin N-doped graphene layers massively promote electron transfer from the encapsulated metals to the graphene surface, which efficiently optimizes the electronic structure of the graphene surface and thereby triggers ORR activity at the graphene surface. With the synergistic effect arising from the N-doped graphene and Fe nanoparticles with porous aciniform nanostructures, the Fe@N-G hybrid catalyst exhibits high catalytic activity, which was evidenced by high E-1/2 of 0.82 V, onset potential of 0.93 V, and limiting current density of 4.8 mA cm(-2) indicating 4-electron ORR, and even exceeds the catalytic stability of the commercial Pt catalyst.</P>