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광대역 측온저항체 온도센서용 Pt-Co 합금박막의 증착과 그 특성
김서연,노상수,정귀상 경북대학교 센서기술연구소 1997 센서技術學術大會論文集 Vol.8 No.1
Platinum-Cobalt alloy thin films were deposited on Al_(2)O_(3) substrate by magnetron cosputtering for RTD with wide temperature range. We made Pt-Co alloy resistance patterns on the Al_(2)O_(3) substrate by lift-off method and investigated the physical and electrical characteristics of these films under various conditions, the input power, working vacuum, annealing temperature and time, and also after annealing these films. The resistivity and sheet resistivity of these films were decreased with increasing the annealing temperature. After the annealing treatment at 800℃ for 60 min, the resistivity and sheet resistivity of Pt-Co thin films was 15μQ·cm and 0.5Ω/□, respectively and the TCR value of Pt-Co alloy thin films with thickness of 3000Å was 3740ppm/℃ in the temperature range of 25-600℃. These results indicate that Pt-Co alloy thin films have potentiality for the RTD with wide temperature range.
Seo, Ji-Yeoun,Suh, Chang-Hee,Jung, Ju-Yang,Kim, Ar-Reum,Yang, Ji Won,Kim, Hyoun-Ah The Authors. Published by Wolters Kluwer Health, I 2017 Medicine Vol.96 No.29
<P>The NLR can be used as a diagnostic tool and predictor of relapse in AOSD, and for differential diagnosis of HLH.</P>
S-284 Prognostic impact of Left Ventricular Mass Change in ST-elevation Myocardial Infarction
( Ji-yeoun Seo ),( Jin-sun Park ),( Kyoung-woo Seo ),( Hyoung-mo Yang ),( Hong-seok Lim ),( Byoung-joo Cho ),( So-yeon Choi ),( Myeong-ho Yoon ),( Gyo-seung Hwang ),( Seung-jea Tahk ),( Joon-han Shin 대한내과학회 2016 대한내과학회 추계학술대회 Vol.2016 No.1
Background:?Prognostic significance between progression LVH and clinical outcomes in patients with ST-elevation myocardial infarction (STEMI) is uncertain. This study aimed to investigate prognostic impact of progression of LV mass index (LVMI) in patients with STEMI.?Methods:?We analyzed the data and clinical outcomes of patients with STEMI who received successful coronary intervention. We finally enrolled 200 patients (166 males, 56 ±11 year-old) performed echocardiographic follow-up (F/U) between 12 and 36 months. According to the change in LVMI compared with baseline LVMI, patients were classified into progressed LVMI group and no progressed LVMI group. Progression of LVMI was defined as increment of LMVI greater than 10% compared with the baseline LVMI. Occurrence of major adverse cardiovascular events (MACE; death, recurrent MI, target vessel revascularization (TVR) within 5 years was evaluated. Results:?Progression of LVMI was occurred in 55 patients (42 males, 55±11 year-old). The event-free survival of all-cause mortality and recurrent MI in the progressed LVMI group was significantly worse than the no progressed LVMI group (log-rank p=0.002 and 0.005 figure). In a cox-regression model, the progressed LVMI group was associated with increased risk for recurrent MI (HR, 5.794; 95% CI, 1.445-23.239, p=0.013). By multivariate logistic regression, initial LVMI (odds ratio [OR], 1.012; 95% confidence interval [CI], 1.000-1.023; p=0.047] and F/U LVMI (OR, 1.016; 95%CI, 1.000-1.032, p=0.049) were independent predictors for MACE. Progression of LVMI was only independent predictor of MI (OR, 6.069; 95% CI, 1.426-25.822, p=0.015).?Conclusions:?In present study, increased LVMI was an independent predictor for adverse events, especially for recurrent MI, in patients with STEMI who received successful coronary intervention.
오수연 ( Seo Yeoun Oh ),강완규 ( Wan Kyu Kang ),강정원 ( Jeong Won Kang ),김기섭 ( Ki Sub Kim ),이흔 ( Huen Lee ) 한국화학공학회 2012 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.50 No.6
CdTe 나노입자로부터 형성된 나노리본은 독특한 광학적 특성을 나타낸다. 용액 내 CdTe의 Te2- 이온의 산화는 나 노입자에 불규칙적인 결함을 유발하며 이때 여러 층의 나노결정으로 구성된 나노리본을 형성하게 된다. 본 연구에서 는 자기조립 된 CdTe 나노입자가 나노리본을 형성하는 과정에서 빛을 조사하였다. 빛은 용액 내 CdTe 나노입자의 표 면에 위치한 Te2-의 산화를 촉진시키는 촉매 역할을 수행한다. 합성된 3차원 나노리본의 형태와 특성을 투과전자현미 경(TEM)으로 조사하였다. TEM 결과 안정제가 완전히 제거된 부분에서 부분적으로 접힌 꼬인 형태의 다결정 나노리 본을 관찰할 수 있었다. Photoluminescence (PL) 측정 결과 550 nm에서 544 nm로 나노입자가 나노리본으로 형성될 때 Blue shift 되었음을 확인하였다. 본 연구에서 제안된 새로운 합성법은 나노물질을 합성하는 새로운 대안을 제시한다. CdTe nanoribbons feature their unique optical properties compared with CdTe nanoparticles. Slow oxidation of tellurium ions on CdTe nanoparticles resulted in the organization of individual nanoparticle into nanoribbons. The light-controlled self-assembly of CdTe nanoparticles led to twisted ribbons. It was found that irradiation improved the oxidation of tellurium ions, Transmission electron microscopy (TEM) were performed to characterize the synthesized nanostructures and showed nanowires were twisted after self-assembly. The photoluminescence was slightly blueshifted from 550 to 544 nm. This synthetic procedure could potentially provide a key step toward the fabrication of nanowires.
Seo, Mirinae,Ryu, Jung Kyu,Jahng, Geon-Ho,Sohn, Yu-Mee,Rhee, Sun Jung,Oh, Jang-Hoon,Won, Kyu-Yeoun The Korean Society of Radiology 2017 KOREAN JOURNAL OF RADIOLOGY Vol.18 No.1
<P><B>Objective</B></P><P>The purpose of this study was to estimate the T2* relaxation time in breast cancer, and to evaluate the association between the T2* value with clinical-imaging-pathological features of breast cancer.</P><P><B>Materials and Methods</B></P><P>Between January 2011 and July 2013, 107 consecutive women with 107 breast cancers underwent multi-echo T2*-weighted imaging on a 3T clinical magnetic resonance imaging system. The Student's <I>t</I> test and one-way analysis of variance were used to compare the T2* values of cancer for different groups, based on the clinical-imaging-pathological features. In addition, multiple linear regression analysis was performed to find independent predictive factors associated with the T2* values.</P><P><B>Results</B></P><P>Of the 107 breast cancers, 92 were invasive and 15 were ductal carcinoma <I>in situ</I> (DCIS). The mean T2* value of invasive cancers was significantly longer than that of DCIS (<I>p</I> = 0.029). Signal intensity on T2-weighted imaging (T2WI) and histologic grade of invasive breast cancers showed significant correlation with T2* relaxation time in univariate and multivariate analysis. Breast cancer groups with higher signal intensity on T2WI showed longer T2* relaxation time (<I>p</I> = 0.005). Cancer groups with higher histologic grade showed longer T2* relaxation time (<I>p</I> = 0.017).</P><P><B>Conclusion</B></P><P>The T2* value is significantly longer in invasive cancer than in DCIS. In invasive cancers, T2* relaxation time is significantly longer in higher histologic grades and high signal intensity on T2WI. Based on these preliminary data, quantitative T2* mapping has the potential to be useful in the characterization of breast cancer.</P>
Chicken embryo lethality assay for determining the virulence of Riemerella anatipestifer isolates.
Seo, Hye-Suk,Cha, Se-Yeoun,Kang, Min,Jang, Hyung-Kwan World Veterinary Poultry Association 2013 Avian pathology Vol.42 No.4
<P>Riemerella anatipestifer is the causative agent of polyserositis and septicaemia in waterfowl. Twenty-one serotypes have been reported, and there is a strong variation in virulence between strains according to serotype or strain. However, little information is available to assess virulence, such as virulence-associated genes; thus, it is difficult to estimate the risk from field strains. Hence, we established a chicken embryo lethality assay (ELA) model to determine the virulence of R. anatipestifer strains. Three virulent strains (RA T1, RA T7, and V-1) and three avirulent strains (Av-1, Av-2, and Av-3), which were confirmed by duck challenge, were used to perform the ELA. Inoculating 10(2) to 10(4) colony-forming units into the allantoic cavity of 10-day-old embryos discriminated between virulent and avirulent strains based on mortality. Differences in invasion rates into embryonic tissues were found between the RA T1 and Av-1 strains. The maximum colony-forming units of the RA T1 strain were about 1000 times higher than those of the Av-1 strain in the tissue invasion rate for 4 days. We found that the virulent strains killed embryos at mortality rates 50% during the first 3 days after inoculation and that the avirulent strains had death rates of 20% over 5 days. These results obtained by repeated testing suggest that the ELA could be used as a first-line screening method to determine the virulence of R. anatipestifer strains.</P>
대구, 경북 지역의 Helicobacter pylori 제균 치료의 연도별 제균율 변화: 13년간의 다기관 연구
정연수 ( Yeoun Su Jung ),이시형 ( Si Hyung Lee ),박찬서 ( Chan Seo Park ),오명진 ( Myung Jin Oh ),김경옥 ( Kyeong Ok Kim ),장병익 ( Byung Ik Jang ),전성우 ( Seong Woo Jeon ),정민규 ( Min Kyu Jung ),박경식 ( Kyung Sik Park ),김은수 대한소화기학회 2014 대한소화기학회지 Vol.63 No.2
Background/Aims: The eradication rates of Helicobacter pylori infection have been reported to have decreased over the years due to antibiotics resistance. The aim of this study is to investigate the trend of eradication rates of first-line triple therapy for H. pylori over the past 13 year period, and to evaluate factors affecting H. pylori eradication in Daegu and Gyeongsangbuk-do, Korea. Methods: A total of 2,982 patients with H. pylori infection who were treated with either 1 week or 2 weeks first-line therapy (proton pump inhibitor [PPI], amoxicillin, and clarithromycin) from January 1999 through December 2011 were included in this study. Data were collected by retrospectively reviewing the medical records. Results: The overall H. pylori eradication rate was 87.2%. The eradication rates from 1999 to 2011 fluctuated between 78.0% and 95.7%, but no definite evidence of a decreasing tendency was seen over the 13 year period (p=0.113). Furthermore, there was no significant difference in the eradication rate according to the duration of therapy (p=0.592). However, there was a significant difference in the eradication rate among various PPIs (p<0.01). Conclusions: There was no decreasing trend in the H. pylori eradication rate over the past 13 years in Daegu and Gyeongsangbuk-do, Korea. There also was no difference in the eradication rates depending on duration of therapy. However, a significant difference was noted among various PPIs. (Korean J Gastroenterol 2014;63:82-89)