자유수평축 조류발전 시스템의 3차원 유동특성

최진형(Jin Hyung Choi),도덕희(Deog Hee Doh),조효제(Hyo Je Jo),이연원(Yeon Won Lee),Suzuki K,Kato S 한국가시화정보학회 2010 한국가시화정보학회지 Vol.8 No.2

Flow characteristics of a free-horizontal-ax is-turbine (FHAT) current power generation system have been investigated by the use of a volumetric PTV. Three types of FHAT system (S50, SE50, S65) have been tested under the current speed 1.35 knot, 1.5 knot and 2 knot. The width of the blade installed around the body is 50 ㎜. Based upon the power generation characteristics of the FHAT, the flow features of the blade have been investigated. Among the three models it has been verified that the S65 is the most appropriate for power generations.

Cloning and induction patterns of Cu/Zn superoxide dismutase in responses to immune elicitors and nucleopolyhedrovirus in the beet armyworm Spodoptera exigua

Mi Y. NOH,조용훈,Cheol H. PARK,Eun S. LEE,Hyo J. LEE,김익수,이용석,Sook J. SEO,In S. BANG,김선곤,한연수 한국곤충학회 2010 Entomological Research Vol.40 No.6

Superoxide dismutase (SOD) is a metalloenzyme that catalyzes the dismutation of the superoxide anion to oxygen and hydrogen peroxide, and has accordingly been known to play an important role in reducing oxidative stresses induced by various stresses and infection. In an attempt to investigate whether it is involved in antiviral immune responses in insects, the full-length cDNA of SeCu/ZnSOD was obtained from the cDNA library of Spodoptera exigua. It is 1,008 bp long (excluding poly-A tail) with the open reading frame of 459 bp encoding 152 amino acids. Sequence analysis with BLAST shows identities to various insects such as Bombyx mori (80%), Hyphantria cunea (80%), Plutella xylostella (77%), Aedes aegypti (73%), Apis mellifera (71%), Lasius niger (70%), Drosophila melanogaster (69%) and Gryllotalpa orientalis (67%). During development, S. exigua expressed SeCu/ZnSOD predominantly at embryonic stage, pupal stage and adult female stage, whereas it was slightly expressed in larvae and adult male. In addition, SeCu/ZnSOD was highly expressed in the fat body, hemocyte, silk gland and Malpighian tubule, although the levels of SeCu/ZnSOD transcripts were very low in the gut. Furthermore, SeCu/ZnSOD mRNA was slightly induced in response to either lipopolysaccharide or laminarin. Finally, SeCu/ZnSOD mRNA was induced in carcass in response to S. exigua nucleopolyhedrovirus (SeNPV) infection, whereas it was not strikingly induced in the gut. The precise roles of SeCu/ZnSOD in antiviral immune response remains to be further studied.

W(110) 표면에 CO와 O_2의 공동흡착

이경희,한현석,윤효근,부진효,이순보,곽현태 성균관대학교 기초과학연구소 1998 論文集 Vol.49 No.-

The coadsorption of CO and O₂ on W(110) surface was studied by LEED, TDS, and photoelectron spectroscopy. In the TDS for the coadsorption of CO at RT on O₂ precovered W(110) surface, two CO desorption states were observed at about 400 and 1150 K, called α and β , respectively. The β-CO spectra with second order desorption kinetics were shifted to lower desorption temperature as increasing the amount of preadsorbed atomic oxygen on the W(110). Moreover, the β-CO spectra were gradually increased with increasing the amount of preadsorbed oxygen to 0.5 ML. Even though a (2 x 1) LEED pattern appeared during oxygen adsorption at RT and 1-3 L oxygen exposures, we didn't observe any new pattern induced by CO in this study. Only the structure of c(11 x 5) was obtained at temperature in the range of 800-1100 K. These results indicated that there were interaction between CO and O and thereby the β-CO might riot be dissociated even at the higher temperature than 800 K. By using the XPS and UPS, it was also confirmed that the coadsorbed β-CO at 900 K doesn't dissociate as the experimental results of the adsorption of pure CO on W(110) surface at the same temperature. According to the valence band spectra, two CO peaks at near -10.7 eV (4σ) and -7.0 eV (5σ+1π) were observed, indicating molecular CO adsorption on the oxygen preadsorbed surface at RT. Even heating the coadsorbed surface to 900 K, we could also detect the CO 4σ peak which can be an important factor for identifying a contribution of the CO 4σ molecular orbital to the CO-metal bond. To our best knowledge, this is the first report and quite contradictory result to that reported previously.

Volumetric PTV에 의한 수평자유축 조류발전 시스템의 3차원 유동특성 분석

최진영(Jin Hyung Choi),도덕희(Deog Hee Doh),조효제(Hyo Je Jo),이연원(Yeon Won Lee),Suzuki K.,Kato S. 한국가시화정보학회 2009 한국가시화정보학회 학술발표대회 논문집 Vol.2009 No.11

Flow characteristics of a free-horizontal-axis-turbine(FHAT) current power generation system have been investigated by the use of a volumetric PTV. Three types of FHAT system have been tested under the current speed 1.35knot, 1.5knot and 2knot. The width of the blade installed around the body is 50mm. The load test has been carried out under the same flow conditions. Among the models it has been verified that the S65 is most appropriate for power generations.

몽골인 체질진단지 개발 : 개정 및 번역

김경수,김상혁,이갑수,유정희,황민우,이준희,고병희,김효정,이시우,김종열,문영식,이의주,Kim, Kyung-Su,Kim, Sang-Hyuk,Lee, Gab-Su,Yoo, Jung-Hee,Hwang, Min-Woo,Lee, Jun-Hee,Koh, Byung-Hee,Kim, Hyo-Jung,Lee, Si-Woo,Kim, Jong-Yoel,Moon, Young-S 사상체질의학회 2007 사상체질의학회지 Vol.19 No.3

1. Objectives This study focuses on the Revision and Translation of the Mongolian's Sasang constitution Diagnosis Questionnaire (SDQ-M) 2. Methods 03'SDQ's questionnaire analysis study have been performed based on the absolutely diagnosed group of 423 cases who have respond to the Sasang constitution Diagnosis Questionnaire (SDQ) from June to November, 2003. 3. Results and Conclusions Revised 05'SDQ-M's traits, which result from on the basis of 03'SDQ's questionnaire analysis study results and socio-cultural understanding via Mongolian physical constitution diagnosis as well as Mongolian translators' interchange, are as follows. (1) 05'SDQ-M is mainly adjusted in terms of external appearances and the nature of illness symptoms. (2) 05'SDQ-M's physical constitution questionnaires are equally adjusted. (3) 05'SDQ-M is re-used, deleted, or created on the basis of 03'SDQ's questionnaire analysis results. (4) 05'SDQ-M is translated to be easy for Mongolians.

Diphenylalanine Peptide Nanotube Energy Harvesters

Lee, Ju-Hyuck,Heo, Kwang,Schulz-Schö,nhagen, Konstantin,Lee, Ju Hun,Desai, Malav S.,Jin, Hyo-Eon,Lee, Seung-Wuk American Chemical Society 2018 ACS NANO Vol.12 No.8

<P>Piezoelectric materials are excellent generators of clean energy, as they can harvest the ubiquitous vibrational and mechanical forces. We developed large-scale unidirectionally polarized, aligned diphenylalanine (FF) nanotubes and fabricated peptide-based piezoelectric energy harvesters. We first used the meniscus-driven self-assembly process to fabricate horizontally aligned FF nanotubes. The FF nanotubes exhibit piezoelectric properties as well as unidirectional polarization. In addition, the asymmetric shapes of the self-assembled FF nanotubes enable them to effectively translate external axial forces into shear deformation to generate electrical energy. The fabricated peptide-based piezoelectric energy harvesters can generate voltage, current, and power of up to 2.8 V, 37.4 nA, and 8.2 nW, respectively, with 42 N of force, and can power multiple liquid-crystal display panels. These peptide-based energy-harvesting materials will provide a compatible energy source for biomedical applications in the future.</P> [FIG OMISSION]</BR>

Poster Session : PS 0663 ; Rheumatology ; The Seasonality of Gout Onset and Flares in Korea

( Hyo Jin Choi ),( Chan Hee Lee ),( Joo Hyun Lee ),( Bo Young Yoon ),( Hyoun Ah Kim ),( Chang Hee Suh ),( Sang Tae Choi ),( Jung Soo Song ),( Hoyeon Joo ),( Sung Jae Choi ),( Ji Soo Lee ),( Kee Chul S 대한내과학회 2014 대한내과학회 추계학술대회 Vol.2014 No.1

Background: To evaluate seasonality of gout onset and fi ares in Korea. Methods: We retrospectively examined data from 330 patients seen at nine rheumatology multicenter clinics, under urate lowering therapy (ULT) more than one year after stopping prophylactic medication. Demographic data, clinical and laboratory features and seasonality of gout fi are were collected. Season was classifi ed as three-month time intervals (the period from March through May was defi ned as spring). Results: The mean age was 52.2 years and mean disease duration was 26.8 months. The male to female count was 318:12. The season of gout onset was most common in summer (28.5%). During ULT, 113 of the 330 patients (34.2%) experienced at least one gouty attack in the period from stopping prophylaxis to one year later. Total gout fi ares were one hundred forty-seven (male 97.3%). Gout fi ares were most common in summer (30.6%), and then fall (25.2%), spring (22.4%), and winter (21.8%). The most common month of fi are was June (13.6%), following by August (10.2%), September (9.5%) and February (9.5%). The aggravating factor was identifi ed in 60 fi ares; alcohol (68.3%), concomitant drugs (13.3%), food (10.0%), and work/exercise (8.3%). The proportion of alcohol in summer was higher (88.9%) than other seasons. In the patients with attained to the target serum uric acid (< 6mg/dL) at the end of prophylaxis (n=52), gout fi ares were most common in fall (35.8%) and September (17.0%). Conclusions: Gout onset of Korea was most common in summer. The summer and fall were most common seasons of gout fi are during ULT. We suggested that increased physical activity, changes of temperature, dehydration and alcohol consumption might be associated with our results.

Inverse Transfer Method Using Polymers with Various Functional Groups for Controllable Graphene Doping

Lee, Seong Kyu,Yang, Jae Won,Kim, Hyun Ho,Jo, Sae Byeok,Kang, Boseok,Bong, Hyojin,Lee, Hyo Chan,Lee, Geunsik,Kim, Kwang S.,Cho, Kilwon American Chemical Society 2014 ACS NANO Vol.8 No.8

<P>The polymer-supported transfer of chemical vapor deposition (CVD)-grown graphene provides large-area and high-quality graphene on a target substrate; however, the polymer and organic solvent residues left by the transfer process hinder the application of CVD-grown graphene in electronic and photonic devices. Here, we describe an inverse transfer method (ITM) that permits the simultaneous transfer and doping of graphene without generating undesirable residues by using polymers with different functional groups. Unlike conventional wet transfer methods, the polymer supporting layer used in the ITM serves as a graphene doping layer placed at the interface between the graphene and the substrate. Polymers bearing functional groups can induce n-doping or p-doping into the graphene depending on the electron-donating or -withdrawing characteristics of functional groups. Theoretical models of dipole layer-induced graphene doping offered insights into the experimentally measured change in the work function and the Dirac point of the graphene. Finally, the electrical properties of pentacene field effect transistors prepared using graphene electrodes could be enhanced by employing the ITM to introduce a polymer layer that tuned the work function of graphene. The versatility of polymer functional groups suggests that the method developed here will provide valuable routes to the development of applications of CVD-grown graphene in organic electronic devices.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/ancac3/2014/ancac3.2014.8.issue-8/nn503329s/production/images/medium/nn-2014-03329s_0006.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/nn503329s'>ACS Electronic Supporting Info</A></P>

Estimation of direct-contact fraction for phenanthrene in surfactant solutions by toxicity measurement

Lee, Hyo J.,Lee, Min W.,Lee, Dae S.,Woo, Seung H.,Park, Jong M. Elsevier 2007 Journal of biotechnology Vol.131 No.4

<P><B>Abstract</B></P><P>The toxicity of solutions containing nonionic surfactants Tween 80, Brij 35 and/or phenanthrene to <I>Pseudomonas putida</I> ATCC 17484 was investigated. The fraction of direct contact between micellar-phase phenanthrene and bacterial cell surface was estimated by using the toxicity data and a mathematical model. The mathematical model was used to calculate phenanthrene concentration in the micellar phase and aqueous pseudophase separately. The first-order death rate constant increased from 0.088±0.016 to 0.25±0.067h<SUP>−1</SUP> when the phenanthrene concentration was increased from 0 to 5.17×10<SUP>−6</SUP>M (equals water solubility). The intrinsic toxicity of surfactant was higher in Brij 35 than in Tween 80. When phenanthrene concentration was increased to 9.7×10<SUP>−5</SUP>M in surfactant solutions, the death rate constant increased to 1.8±0.024 and 0.41±0.088h<SUP>−1</SUP> for 8.4×10<SUP>−4</SUP>M Brij 35 and 7.6×10<SUP>−4</SUP>M Tween 80. The direct-contact fraction was 0.083 and 0.044 for Brij 35 and Tween 80, respectively, under these conditions using exponential model. The toxicity increased with increasing phenanthrene concentration at a fixed surfactant concentration. The toxicity decreased with increasing the surfactant concentration at a fixed phenanthrene concentration due to decreased contact of bacteria with phenanthrene present in the interior of surfactant micelles.</P>

Canna edulis Leaf Extract-Mediated Preparation of Stabilized Silver Nanoparticles: Characterization, Antimicrobial Activity, and Toxicity Studies

( S. V. Otari ),( S. H. Pawar ),( Sanjay K. S. Patel ),( Raushan K. Singh ),( Sang-yong Kim ),( Jai Hyo Lee ),( Liaoyuan Zhang ),( Jung-kul Lee ) 한국미생물 · 생명공학회 2017 Journal of microbiology and biotechnology Vol.27 No.4

A novel approach to synthesize silver nanoparticles (AgNPs) using leaf extract of Canna edulis Ker-Gawl. (CELE) under ambient conditions is reported here. The as-prepared AgNPs were analyzed by UV-visible spectroscopy, transmission emission microscopy, X-ray diffraction, Fourier transform-infrared spectroscopy, energy-dispersive analysis of X-ray spectroscopy, zeta potential, and dynamic light scattering. The AgNPs showed excellent antimicrobial activity against various pathogens, including bacteria and various fungi. The biocompatibility of the AgNPs was analyzed in the L929 cell line using NRU and MTT assays. Acridine orange/ ethidium bromide staining was used to determine whether the AgNPs had necrotic or apoptotic effects on L929 cells. The concentration of AgNPs required for 50% inhibition of growth of mammalian cells is far more than that required for inhibition of pathogenic microorganisms. Thus, CELE is a candidate for the eco-friendly, clean, cost-effective, and nontoxic synthesis of AgNPs.