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( Joon Ho AHN ),( Min Chul KIM ),( Jae Yeong CHO ),( Hae Chang JEONG ),( Ki Hong LEE ),( Keun Ho PARK ),( Doo Sun SIM ),( Nam Sik YOON ),( Hyun Joo YOON ),( Kye Hun KIM ),( Young Joon HONG ),( Hyung W 대한내과학회 2014 대한내과학회 추계학술대회 Vol.2014 No.1
Background: There is limited data which compared clinical outcomes of stress hyperglycemia (SH) defi ned by random glucose (RG) and fasting blood glucose (FBG). Methods: A total of 1364 non-diabetic patients whose HbA1c <6.5% in the COREAAMI (The COnvergent REgistry of cAtholic and chonnAm university for Acute MI) registry were analyzed. All enrolled patients received PCI and were divided into two groups by initial glucose level for each RG and FBG: SH and normoglycemia group (188 [RG = 180 mg/dl] and 1176 patients [RG < 180 mg/dl] by RG; and 720 [FBG = 126 mg] and 644 patients [FBG < 126 mg/dl] by FBG). The primary outcome was all-cause mortality, and we also investigated the incidence of cardiac death, nonfatal MI, any revascularization and stroke during 4 years after AMI. Results: A total of 648 patients (47.5%) were checked FBG after PCI, and remained 716 patients checked FBG before PCI. When SH was defi ned by RG, in-hospital mortality (0.7% vs. 2.7%, p=0.024), all-cause mortality (hazard ratio [HR] 1.83, 95% confidence interval [CI] 1.33-2.52, p <0.001) and cardiac mortality (HR 2.72, 95% CI 1.75-4.22, p <0.001) were higher in SH group. However, there were no signifi cant differences in in-hospital mortality (0.6% vs. 1.3%, p=0.274), all-cause mortality (HR 1.21, 95% CI 0.93-1.58, p=0.160) and cardiac mortality (HR 1.32, 95% CI 0.88-1.99, p=0.175) between SH and normoglycemia group when SH was defi ned by FBG. The incidences of nonfatal MI, any revascularization and stroke were not signifi cantly different between the groups by both RG and FBG defi nition. Conclusions: SH was associated with higher mortality compared to patients with normoglycemia in non-diabetic AMI patients when only defi ned by RG, not FBG.
Analysis of Spatial Association of Entomopathogenic and Other Free-living Nematodes
Jung-Joon Park,Kijong Cho,Casey W. Hoy,Parwinder S. Grewal 한국응용곤충학회 2012 한국응용곤충학회 학술대회논문집 Vol.2012 No.10
Spatial association of entomopathogenic and free-living nematode populations were analyzed at the landscape scale. Free-living nematodes were classified into functional guilds based on their trophic level (i.e. bacterivores, carnivores, fungivores, and omnivores) and life history characteristics (i.e. r-selected colonizing versus K-selected persisting species) in the soil ecosystem. Differences in life history traits were hypothesized to result in different spatial associations of populations. Spatial aggregation indices were calculated for each nematode group. Spatial associations were analyzed and compared for entomopathogenic nematodes (EPN) and each trophic/life history group of free-living nematodes based on spatial analysis of distance indices (SADIE). Spatial aggregation indices (Ia) revealed that taxa with more K-selected persisting life history were less aggregated in their habitat, whereas more r-selected colonizer life history types showed more aggregation. Spatial aggregation index of EPN populations was similar to that of relatively r-selected colonizer type free-living nematodes, which share several life history traits including high reproductive rates and insect phoresy. There were substantial spatial associations between EPN and r-selected colonizer life history free-living nematode taxa.
산 및 알칼리 공정으로 조제한 수리미 가열 겔의 물성 특성
최영준(Yeung Joon Choi),박주동(Joo Dong Park),조영제(Young Je Cho),(Jae W. Park),김진수(Jin Soo Kim) 한국수산과학회 2002 한국수산과학회지 Vol.35 No.4
알칼리 pH에서 어육 단백질을 녹인 후 등전점 처리를 통하여 단백질을 회수하고, 중성으로 pH를 조절하여 조제한 알칼리 수리미 가열 겔의 파괴강도와 변형값은 수세 과정을 통해 조제한 기존의 수리미 가열 겔에 비하여 손색이 없는 것으로 나타났으나, 백색도 값은 수리미에 남아있는 혈색소와 육 색소로 인하여 낮게 나타났다. 산처리 수리미의 저장 modulus 값은 수분 함량이 감소함에 따라 감소하였으나, 알칼리 수리미의 경우는 증가하였다. 수리미의 최종 pH는 저장 modulus 값에 영향을 미치고 형태는 산처리와 알칼리 처리 수리미 간에 다소 차이를 보였다. Potassium bromide는 S-S 결합의 형성을 통해 가열 겔의 저장 modulus를 증가시키는 것으로 나타났다. 알칼리 처리 수리미는 파괴강도, 변형값 및 백색도에 미루어 어묵 grade의 연제품 제조를 위한 원료로는 손색이 없는 것으로 판단하였다. Rheological properties of surimi gel from white fishes by acid (add surimi) and alkali (alkali surimi) process and effect of chemicals on gelation were investigated by punch and dynamic tests. The breaking force and deformation values of heat-induced gel of acid surimi were less than their values of alkali and conventional surimi gel, and whiteness was greatly decreased. Gel point of acid surimi was decreased but it of alkali surimi was increased with increasing moisture content in the range of 80 to 85%. Storage modulus of acid surimi was the highest vaule in pH 6.8, but that of alkali surimi showed high vaule at neutral and slightly alkali pH. Propylene glycol increased storage modulus in 20∼50℃, but urea and 2-mercaptoethanol suppressed it. Potassium bromide improved storage modulus in 20∼80℃. The results suggest that alkai process is used for making surimi instead of conventional method.
접지품질 개선을 위한 접지저항 최적화 및 접지충진제의 전기적 특성 연구
박철근(Park Chul-Geun),안성준(Ahn Seong-Joon),우제욱(Woo, J.W.),안수준(Ahn, S.J.),유용정(Yu, Y.J.),안승준(Ahn Seung-Joon) 한국산학기술학회 2006 한국산학기술학회논문지 Vol.7 No.6
시설물이나 장비로 surge wave가 유입되는 것을 방지하기 위해서는 접지시스템의 접지저항을 수 Ω 정도로 낮추어야 하지만 시공비를 낮추기 위하여 적절한 접지저항 값을 결정하는 것이 중요한 문제이다. 본 연구에서는 접지 저항 simulator를 이용하여 최적화된 경제적 접지저항(임피던스) 값을 설정하였으며 수용성 알칼리족 원소와 활성탄소를 주성분으로 하는 새로운 접지충진제를 개발하여 접지품질을 개선하기 위한 전기적 특성을 평가하였다. In earthing technologies, the intrusion of the surge wave can be protected when the earthing resistance is as low as several ohms. However, the cost for realizing such a low resistance is quite high. Therefore it is important to determine appropriate target value of the earthing resistance to install cost-effective grounding system. In this work, we have proposed an optimization method of the earthing resistance according to the various environmental parameters by using a numerical simulator. We have also developed new catalyst composed of water-soluble alkaline elements and activated carbon and investigated its electrical characteristics for enhancement of the earthing qualities.
참나물(Pimpinella brachycaroa)의 경단절편체로부터 다량의 이차체세포배 발생과 식물체 재분화
김준철(Joon C kim),박영찬(Young C. Park),이광웅(Kwang-W Lee),조성호(Sung H. Cho),한태진(Tae J. Han) 강원대학교 기초과학연구소 1997 기초과학연구 Vol.8 No.-
For the induction of somatic embryogenic callus, shoot-tip explants of Pimpinella brachycarpa were cultured on MS medium supplemented with 0.5mg/L 2.4-D and 0.1mg /L BA for four weeks. Embryogenic calli were cluster of small and dense cells termed proembryogenic masses(PEMs), whereas non-embryogenic calli were friable. These PEMs developed into multi-somatic embryo when transferred to MS medium with 0.1mg /L NAA. After three weeks of culture, globular, heart and torpedo-stage embryos appeared and these embryos were excised and transferred to MS liquid medium with OJ mg/L NAA at a density of 20 embryos/mL. After two weeks of culture in the liquid medium, these somatic embryos developed into plantlets with cotyledons, hypocotyls and radicles. Upon transfer to MS medium with 2.0 mg/L GA₃ plantlets were proliperated and these regenerants were acclimated to soil under greenhouse conditions. Secondary somatic embryogenesis took placed in shoot-tip explants of in vitro PEM-derived regenerants on MS medium with 0.1 mg/L NAA at a frequency of 72 %
Engineering ferromagnetic lines in graphene by local functionalization using AFM lithography
Bae Ho Park,Ik-Su Byun,Danil W. Boukhvalov,Duk Hyun Lee,Wondong Kim,Jaeyoon Baik,Hyun-Joon Shin,Young-Woo Son 한국자기학회 2021 한국자기학회 학술연구발표회 논문개요집 Vol.31 No.1
Monolayer graphene with sp<sup>2</sup>-carbon-atom network is a promising platform for next-generation spintronic devices due to its high carrier mobility and long spin relaxation length. For implementation of practical and high-density graphene-based spintronic devices, we need to define nanoscale areas with ferromagnetic properties on graphene. Up to now, conventional ferromagnetic metal electrodes accompanied by barrier insulators have been used for injection and detection of polarized spins in graphene-based spintronic devices. If graphene-based materials show ferromagnetic behaviors, they will become ideal candidates for spin injectors and detectors, because they structurally, chemically, and electrically match well with pristine graphene. In this presentation, I will report on local magnetic characteristics of nanoscale graphene oxidized and hydrogenated by atomic force microscope (AFM) lithography without conventional sources of surface contamination and chemical agents. By using AFM lithography, we can selectively control functional groups and their coverages on the nanoscale at the surface of graphene. By performing magnetic force microscope (MFM) measurement, we can clearly distinguish local magnetic signal of selectively oxidized or hydrogenated graphene from that of surrounding pristine graphene which does not produce ferromagnetic signal. The nanoscale oxidized and hydrogenated graphene show experimental evidences for room-temperature ferromagnetism. From x-ray magnetic circular dichroism photoemission electron microscope (XMCD-PEEM) measurement, we also identified remarkable asymmetry in carbon K edge XMCD spectra, which strongly indicates that the observed ferromagnetic order in functionalized graphene layers is intrinsic.