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고위도 지역에서 내한성 차나무 육성을 위한 국내외 수집종의 생육 및 특성분석
허남기(Nam-Kee Heo),이광재(Kwang-Jae Lee),김희연(Hee-yeon Kim),임상현(Sang-hyen Leem),함헌주(Heon-Joo Ham),김경희(Kyeng-Hee Kim),이철훈(Cheol-Hun Lee),한상섭(Sang-seob Han) 한국차학회 2010 한국차학회지 Vol.16 No.2
This study investigated the genetic characteristics of tea tree lines collected both in Korea and abroad via a functional analysis of growing features such as cold hardiness. The purpose of this study was to determine the conditions required for the stable cultivation of tea trees in Goseong at high altitudes and under climatic conditions less favorable than those in southern regions. In accordance with the analysis, 8 lines including GS 1 showed stronger cold hardiness than Yabukida, the standard variety, and the harvest period was faster by 1 to 4 days compared to Yabukida. The number of leaves per stock was 102 to 155 in 6 lines. In accordance with the analysis on indoor freezing (EC), 16 lines had high resistance to freezing with LT50 (winter killing temperature) from -10.15 to -12.42oC. The total catechin content was 4.79 to 7.16%, similar to or lower than that of Yabukida. However, GS 8 and GS 15 had higher GCg and ECg values, respectively. The GS 7 and GS 18 lines had lower caffeine content, whereas the tannin content was lower in the G21 line. RAPD classified the varieties into 3 groups based on 75% similarity. It was found that 3 lines, GS 15, GS 19 and GS 21, were genetically very similar. It was estimated that 5 lines, GS 15, 16, 19, 21 and GS 22, which were selected according to strong cold hardiness, can be grown as promising lines at high altitudes.
Helicobacter pylori 감염을 동반한 T 림프구 기원의 원발성 위 림프종 1 예
남은숙,김학양,유재영,박충기,김종혁,김용범,박수종,유희승,김성균,허필석 대한소화기내시경학회 1999 Clinical Endoscopy Vol.19 No.2
The primary T-cell lymphoma of the stomach is a extremely rare disease, only about 33 cases were described in the literature since 1986. Recent studies have proved a strong relation between Helicobacter pylori infection and several gastric diseases such as peptic ulcer, chronic gastritis, gastric cancer, and lymphoma. We report a case of primary gastric T-cell lymphoma with H. pylori infection in a 63-year-old male who had a history of epigastric fullness for 2 years. Gastroscopy showed a round ulcer of 1cm in size on anterior side of gastric angle. The gastroscopic biopsy revealed diffuse large cell malignant non-Hodgkin' s lymphoma on light microscopic examination, and T-cell immunophenotype with immunohistochemical study. The result of CLOtest was positive. No lymphadeno-pathy was found with chest roentgenogram and computed omography of abdomen and pelvis. Bone marrow examination showed normal finding.
Park, Chul-Kee,Kim, Jeong Hoon,Nam, Do-Hyun,Kim, Chae-Yong,Chung, Sang-Bong,Kim, Young-Hoon,Seol, Ho Jun,Kim, Tae Min,Choi, Seung Hong,Lee, Se-Hoon,Heo, Dae Seog,Kim, Il Han,Kim, Dong Gyu,Jung, Hee-Wo Oxford University Press 2013 Neuro-oncology Vol.15 No.8
<P><B>Background</B></P><P>To determine the benefit of surgical management in recurrent glioblastoma, we analyzed a series of patients with recurrent glioblastoma who had undergone surgery, and we devised a new scale to predict their survival.</P><P><B>Methods</B></P><P>Clinical data from 55 consecutive patients with recurrent glioblastoma were evaluated after surgical management. Kaplan–Meier survival analysis and Cox proportional hazards regression modeling were used to identify prognostic variables for the development of a predictive scale. After the multivariate analysis, performance status (<I>P</I> = .078) and ependymal involvement (<I>P</I> = .025) were selected for inclusion in the new prognostic scale. The devised scale was validated with a separate set of 96 patients from 3 different institutes.</P><P><B>Results</B></P><P>A 3-tier scale (scoring range, 0–2 points) composed of additive scores for the Karnofsky performance status (KPS) (0 for KPS ≥ 70 and 1 for KPS < 70) and ependymal involvement (0 for no enhancement and 1 for enhancement of the ventricle wall in the magnetic resonance imaging) significantly distinguished groups with good (0 points; median survival, 18.0 months), intermediate (1 point; median survival, 10.0 months), and poor prognoses (2 points; median survival, 4.0 months). The new scale was successfully applied to the validation cohort of patients showing distinct prognosis among the groups (median survivals of 11.0, 9.0, and 4.0 months for the 0-, 1-, and 2-point groups, respectively).</P><P><B>Conclusions</B></P><P>We developed a practical scale to facilitate deciding whether to proceed with surgical management in patients with recurrent glioblastoma. This scale was useful for the diagnosis of prognostic groups and can be used to develop guidelines for patient treatment.</P>
엔지니어링 플라스틱과 실리콘 고무가 코팅된 엔지니어링 플라스틱의 내트래킹성 검토
허준(Jun Heo),이승수,정의환(Eui-Hwan Jung),임기조(Kee-Joe Lim),강성화(Seong-Hwa Kang),Jong-Nam Lim 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.7
Surface contamination and leakage current have caused operating problems. A flashover in a substation may result in destruction of an insulator or many others electrical equipment. Engineering plastics have good characteristic (light weight, good productivity and little of void) as compare with epoxy or porcelain insulators. Outdoor insulator must have resistance to contamination. However, they are not suited to outdoor insulator by reason of being not good hydrophobic. RTV has a good property of hydrophobic and ATH has characteristic obstructing exothermic reaction. In order to reduce the incidence of insulator flashover and damage, the silicon rubber contained nano size ATH coat on surface of engineering plastics. In this paper, it compares resistance tracking of the engineering plastic coated RTV with that of non-coated engineering plastic and ATH filled composites performed much better than non-filled composites.
Encapsulation Characteristics of Gas Molecules in the Cavities of Zeolite A
Jin Hyun Kwon,Kee Heon Cho,Hae Won Kim,Soong Hyuck Suh,Nam Ho Heo Korean Chemical Society 1993 Bulletin of the Korean Chemical Society Vol.14 No.5
Encapsulation capacities $(V_{gas})$ of, $H_2,\;N_2,\;CO,\;CH_4$ and CO, for $Cs_{2.5}Na_{9.5}-A (C_s-A)$ and $Na_{12}$-A (Na-A) zeolites have been measured in order to understand the effect of molecular properties on the $V_{gas}$. With appropriate number of large blocking cations on the main windows of cavities in zeolite A, gas molecules can be encapsulated in both the ${\alpha}$ -and ${\beta}$-cages, resulting in much large $V_{gas}.\;V_{gas}$ is proportional to the encapsulation pressure (Pe) and is also dependent on the molecular properties of encapsulated gases themselves, especially on intermolecular forces originated from the quadrupole moments of molecules in the molecular-dimensioned cavities of zeolite A. At the low range of Pe, molecules with larger $V_{gas}$ and intermolecular forces apparently have smaller increasing tendencies of $V_{gas}$ upon increases in Pe, showing a linear relationship between the tendencies and intermolecular forces rather than their sizes. Interactions between encapsulated molecules of $CH_4$ and framework of Cs-A have been estimated and they seem to depend on the number of encapsulated molecules per unit cell. On the basis of calculated density of $CO_2$, presence of liquid-like phase for the encapsulated molecules in the molecular dimensioned cavities of zeolite A is postulated.