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( Donghan Kim ),( Jeong Gwan Cho ),( Ki Hong Lee ),( Min Goo Lee ),( Keun Ho Park ),( Doo Sun Sim ),( Nam Sik Yoon ),( Hyun Ju Yoon ),( Kye Hun Kim ),( Young Joon Hong ),( Ju Han Kim ),( Youngkeun Ahn 대한내과학회 2011 대한내과학회 추계학술대회 Vol.2011 No.1
Background and study objective: The anterior ischemic pattern such as negative T wave is most frequent Electrocardiographic (ECG) sign of pulmonary thromboembolism (PTE) or anterior wall acute myocardial infarction (AMI). The aim of the present study was to evaluate the distinguishable findings between AMI and PTE in patients with negative T wave in anterior lead. Subject and methods: We analyzed 12-lead ECG, echocardiography and laboratory finding of 151 patients (PTE group; n=51, AMI group; n=100) with the diagnosis of PTE and AMI confirmed by computed tomography or coronary angiography, at Chonnam National University Hospital, between July 2008 and July 2011. The ECG analysis included S1Q3T3 complex(negative S waves in lead I and negative Q or T waves in lead III), sinus tachycardia(>100 beats/min), right bundle branch block (RBBB), low QRS voltage in peripheral leads and pulmonary P wave in lead II. Echocardiographic findings was included both ventricular systolic function and right ventricular systolic pressure (RVSP). We compared the ECG, echocardiography and biomarkers to distinguish from PTE and AMI. Results: S1Q3T3 was the most frequent ECG finding (42%), and was more common in PTE than AMI (42% vs. 8.1%, p<0.001). Also sinus tachycardia (36% vs. 6.1%, p<0.001), low QRS in peripheral leads (24% vs. 8.1%, p=0.011), pulmonary P wave in lead II (10% vs. 1%, p=0.016) was more common in AMI than PTE. In echocardiography, RVSP (56 mmHg vs. 29.85 mmHg, p<0.001) and systolic function (65.64% vs. 56.41%, p<0.001) were significantly higher in PTE than AMI. In laboratory findings, D-dimer (0.7851 vs. 0.2112, p<0.001) was significantly higher and Troponin-I was significantly lower (0.4814 vs. 5.7928, p<0.001) in PTE than AMI. Conclusion: The S1Q3T3 in ECG, elevated RVSP in echocardiography, and D-dimer in laboratory findings were useful to distinguish AMI from PTE in patients with negative T wave in anterior lead.
Kim, Ni-Na,Kim, Bong Sun,Lee, Han Bin,An, Sunghyun,Kim, Donghan,Kang, Seok-Seong Korean Society for Food Science of Animal Resource 2022 한국축산식품학회지 Vol.42 No.6
The aim of the study was to investigate the effect of bacteriocin-like inhibitory substance (BLIS) from Enterococcus faecium DB1 on cariogenic Streptococcus mutans biofilm. Crystal violet staining, fluorescence, and scanning electron microscopy analyses demonstrated that the BLIS from Enterococcus faecium DB1 (DB1 BLIS) inhibited S. mutans biofilm. When DB1 BLIS was co-incubated with S. mutans, biofilm formation by S. mutans was significantly reduced (p<0.05). DB1 BLIS also destroyed the preformed biofilm of S. mutans. In addition, DB1 BLIS decreased the viability of S. mutans biofilm cells during the development of biofilm formation and in the preformed biofilm. DB1 BLIS significantly decreased the growth of S. mutans planktonic cells. Furthermore, S. mutans biofilm on the surface of saliva-coated hydroxyapatite discs was reduced by DB1 BLIS. Taken together, DB1 BLIS might be useful as a preventive and therapeutic agent against dental caries caused by S. mutans.
Low-cost LiFePO<sub>4</sub> using Fe metal precursor
Kim, Donghan,Lim, Jinsub,Mathew, Vinod,Koo, Bonil,Paik, Younkee,Ahn, Docheon,Paek, Seung-Min,Kim, Jaekook The Royal Society of Chemistry 2012 Journal of materials chemistry Vol.22 No.6
<P>A nano-LiFePO<SUB>4</SUB> possessing a plate-shaped morphology was synthesized by the solvothermal process using low-cost Fe metal powder as the starting precursor at a moderate temperature of around 230 °C under high pressure. Field-emission scanning electron microscopy (FE-SEM) images revealed the average thickness, length and width of the nanoplates to be 20, 100 and 100 nm respectively. The nanoplate-LiFePO<SUB>4</SUB> delivered specific discharge capacities of 171 mA h g<SUP>−1</SUP> with impressive cycle performance until 150 cycles and high rate capabilities as capacities of 125 mA h g<SUP>−1</SUP> was achieved at elevated <I>C</I>-rates of 16 C. Field-emission transmission electron microscopy (FE-TEM) confirmed the growth of the nanoplates along the [010] and [101] crystallographic directions. Solid state <SUP>7</SUP>Li magic angle spinning nuclear magnetic resonance study suggests progressive Li-ion intercalation/de-intercalation along a specific crystallographic direction and appears to support the domino-cascade model. Extended X-ray absorption fine structure spectroscopy (EXAFS) studies indicated a flexible LiFePO<SUB>4</SUB> nanostructure due to the reconstruction of crystals' surface and thereby realize enhanced capacities. We believe that the strategy to adopt Fe-metal precursor in order to obtain such high performing nano-LiFePO<SUB>4</SUB> is very promising for large-scale commercialization from a cost perspective.</P> <P>Graphic Abstract</P><P>LiFePO<SUB>4</SUB> nanoplates, synthesized by solvothermal reaction using Fe-metal precursor, demonstrated enhanced specific capacities with high Columbic efficiencies and impressive cyclabilities. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c2jm14499a'> </P>
김동한(Donghan Kim) 한국정치학회 2009 한국정치학회보 Vol.43 No.4
본 논문에서는 한국군 구조개편정책의 정책결정요인을 규명하였다. 군구조 개편의 사례로는, 지휘구조 개편을 핵심으로 한 노태우 정부의 818계획과 병력구조 개편을 중핵으로 한 노무현 정부의 국방개혁2020이 대표적이다. 특히 두 사례는 행정부 차원의 정책입안과정과 의회 차원의 심의과정을 거친 대표적인 군구조 개편정책 사례로서, 주요 정책결정요인을 행정부와 의회차원에서 조명할 수 있었다. 정책결정요인 규명 결과를 토대로 군구조 개편정책의 결정구조를 추론하면 다음과 같다. 미국의 군사전략 변화와 대통령의 인식 및 의지에 의해 기존 군구조 정책의 개편문제가 대두되면, 행정부차원에서는 대통령의 정책선호와 육ㆍ해ㆍ공 3군의 권력격차 요인이 국방부의 정책입안과정에 영향력을 행사한다. 의회심의과정에서는 보수성향 정책연합이 과반수 의석을 확보하고 있을 경우, 수적 우위를 바탕으로 그들의 정책선호를 실현하게 된다. 하지만 보수성향 정책연합이 수적 우위를 확보하지 못할 경우에도 이들의 정책선호를 실현할 수 있는 기제로서 지배적 행위자가 존재한다. 지배적 행위자는 군구조 문제에 관한 지배적 정책패러다임을 진보성향 정책연합의 구성원들에게 설명ㆍ이해ㆍ설득시킴으로써, 지배적 정책패러다임이 훼손되지 않는 범위 내에서 최종적인 군구조 개편정책이 산출되도록 관리한다. 따라서 군구조 정책의 경우, 지배적 정책패러다임을 공유하는 보수성향 정책연합의 정책선호가 최종 정책으로 산출되는 구조가 한국사회에 공고화되어 있으며, 그러한 정책결정구조가 장기적 안정성을 유지할 것으로 예측할 수 있다. The purpose of this thesis analyzes the policy making determinants of the military reorganization policy. The 818 Plan under the Roh Tae-Woo Administration which focusing on reorganizing the command structure and the Military Reform 2020 under the Roh Moo-Hyun Administration which laying emphasis on reforming the military forces structure pursued great change in the military structure policy. In particular, these two cases underwent the policy establishing process by the adminstration and the policy deliberating process by the National Assembly. Thus they could be representative military reorganizing policy cases, so the main policy determinants could be illuminated at the Administration and the National Assembly level. On the basis of analyzing the policy making process and the determinants of the military reorganizing policy, the policy making structure is the following. As the issue restructuring the ex-military structure policy is on the rise by the change in US military strategy and the president’s recognition and volition, the president’s policy preference and the power gap among the three armed forces have influence on the policy making process of the Ministry of National Defense at the Executive level. In case the conservative policy coalition hold a majority of the National Assembly during the deliberation process, the policy preferences of the conservative coalition come to realize by the majority of seats. However, although they don’t hold a majority of the National Assembly, their policy preference can be realized through the role of the dominant actor. The dominant actor gives both coalitions the explanation of the dominant policy paradigm, and manages not to damage the paradigm. In this policy making structure, even though the military restructuring policy which established at the executive level is against the dominant paradigm, it could be restored to its original form through the deliberating process of the National Assembly. Therefore in case of the military restructuring policy, the policy making structure that the policy preference of the conservative policy coalition sharing the dominant policy paradigm is reflected on the final policy has been consolidated in Korean society, and such policy making structure will be stable for a long period.