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Son, Hyun-Jin,Chu, Jung-Youb,Cho, Eui-Sic,Lee, Dong-Geun,Min, Myung-Gee,Lee, Suk-Keun,Cho, Nam-Pyo The Korean Academy of Oral Biology 2006 International Journal of Oral Biology Vol.31 No.2
Expression of invasion/metastasis suppressor, E-cadherin, is reduced in many types of human carcinomas. Although somatic and germline utations in the CDH1, which encodes the human E-cadherin, have frequently been reported in cases with diffuse gastric and lobular breast ancers, irreversible genetic inactivations are rare in other human carcinomas. Recently, it has been well documented that some genes in human cancers may be inactivated by altered CpG methylation. Herein, we determined the expression and methylation status of E-cadherin in oral squamous cell carcinoma (SCC) by immunohistochemistry and methylation-specific PCR. The expression of E-cadherin was significantly higher in the well-differentiated oral SCCs than the moderately or poorly differentiated ones. None of eight tested benign pithelial hyperplasias showed aberrant methylation, whereas five of 12 oral squamous cell carcinomas showed aberrant methylation. When we compared E-cadherin expression with methylation status, oral SCCs with normal methylation showed a higher expression of E-cadherin than those with methylation. These findings suggest that aberrant CpG methylation of CDH1 promoter region is closely associated with transcriptional inactivation and might be involved in tumor progression of the oral mucosa.
이단하소에 의해 제조된 PNN-PZ-PN 세라믹의 압전 및 유전특성
이수호,손무헌,조현철,김한근,사공 건 東亞大學校 1997 東亞論叢 Vol.34 No.-
In the fields of the optics, precise machine, semiconductors, the micro-positioning actuators are required for the control of position in submicron range. PNN-PZN-PZT cermics were fabricated with various mole ratio of the PZT[Pb(Zr½ Ti½)O₃] PNN[Pb(Ni⅓Nb⅔)O₃]and PZN[Pb(Zn⅓Nb⅔)O₃]powders prepared by double calcination and PZT powders prepared by molten-salt synthesis method. The formation rate of perovskite phase in PNN-PZN-PZT ceramics could be obtained about 92% at PZT 0.3 mole ratio. The relative permittivity of specimen with PZT 0.3 mole ratio was shown 5,320 and appeared the relaxor ferroelectric feature. The maximum piezoelectric coefficient d₃₁to be used for evaluation the displacement of piezoceramics in PNN-PZN-PZT ceramics was 324×10¹²(C/V) at the vicinity of morphotropic phase boundary and was larger than that of solid PZT ceramics(120×10-¹²C/V).
Escherichia coli 패혈증 환자에 합병된 대칭적 하지 말단 괴사증 1예
남해성,유진홍,권순석,민준기,조현선,박민경,심병주,남유정,이지인,김진수,길욱현,조근종,신완식 대한감염학회 2005 감염과 화학요법 Vol.37 No.6
We have encountered a rare case of symmetrical peripheral gangrene complicating Escherichia coli sepsis in a 47-years-old male. He was successfully treated with antibiotics, anticoagulants, and vasodilator. To our knowledge, this is the first report on symmetrical peripheral gangrene complicating E. coli sepsis in Korea.
Graphical Method for Evaluating Shope Rotatability in Respinse Surface Desings
Cho,Jae-Geun,Jang,Dae-Heung,Park,Sang-Hyun 慶星大學校 1991 論文集 Vol.12 No.2
反應表面分析을 위한 實驗計劃이 가질 수 있는 바람직한 性質로는 몇가지가 있다. 특히 의 기울기를 推定하는 데에 關心이 있는 경우에는, Hader와 Park(1978)이 提示한 기울기 回轉性(slope rotatability)을 갖는 것이 重要하다. Cho(1989)는 回轉性에 對한 기울기 回轉性(slope rotatability over axial directions)의 정도를 알 수 있게 해주는 測度들을 각각 提案하였다. 本 論文에서는 주어진 任意의 反應表面實驗計劃에 對해 軸및 모든 方向에 대한 기울기 回轉性의 정도를 評價할 수 있게 해주는 그래픽 方法을 提案하였다. 이 그래픽 方法은 球形 平均 기울기 分散(spherical average slope variance)과 最大 및 最小 平均 기울기 分散 (maximum and minimum average slope variance)을 球形 領域(spherical region)의 平徑에 對해 作圖하는 기울기 分散 散布 그래프(slope variance dispersion graph)를 利用한다. 이 그래프를 利用해 現在 實驗計劃法에서 많이 쓰이고 있는 反應表面實驗計劃들의 모든 方向에 對한 기울기 回轉性을 서로 比較 ,評價했다.
Cho, Hyun-Geun,Choi, Seung-Ho The Korean Society of Systematic Zoology 2014 Animal Systematics, Evolution and Diversity Vol.30 No.1
Two species of small gobiid fishes genus Luciogobius, i.e., L. elongatus, L. platycephalus were described as the first records from Korea based on specimens collected from gravel beaches of Gijang-gun, Busan-si, Korea. Luciogobius elongatus is distinguished from congeners by very elongated and naked body, 42-44 vertebrae, 6-7 dorsal soft rays, and no free rays on pectoral fin, and L. platycephalus is characterized by having very depressed head, naked body, 40-41 vertebrae, 10-11 dorsal soft rays, and pectoral fin with only upper 2-4 free rays. We propose the new Korean name "Ga-neun-mi-kkeun-mang-dug", "Nab-jak-mi-kkeun-mang-dug" for L. elongatus and L. platycephalus, respectively.
Acaricidal activity of 63 commercial pesticides agaisnt Haemaphysalis logicornis (Acari: Ixodidae)
Geun-Ho Park,Sung Il Kim,Sung Woo Cho,Seung-Ju Lee,Geon-Hui Lee,Sun-Ran Cho,Soeun Shin,Hyun-Na Koo,Hyun Kyung Kim,Gil-Hah Kim 한국응용곤충학회 2018 한국응용곤충학회 학술대회논문집 Vol.2018 No.10
Acaricidal activities of 63 commecial pesticides against the longhorned tick, H. logicornis were investigated. Twenty-two pesticides (4 cabamates, 5 organophophates, 9 pyrethroids, 1 octopamine receptor agonists, 1 diamides, and 1 unknown) against adults H. logicornis showed >80% mortalities after 72 h of treatment. The residual effect of 22 pesticides was investigated at 1, 2, 3, 7, and 10 day intervals on grass for H. logicornis adults and nymphs. Eight and twenty pesticides in H. logicornis adults and nymphs showed >80% acaricidal activity at 3 days after the treatment, respectively. 7 days after the treatment, H. logicornis adults showed <60% acaricidal activity in all pesticides, but 7 pesticides (benfuracarb, gamma cyhalothrin, cypermethrin, lammda cyhalothrin, fenvalerate, cyantraniliprole, fluxametamide) showed >80% acaricidal activity in nymphs. all pesticides exhibited <60% acaricidal activity after 10 days of treatment both adults and mymphs, except benfuracarb showed 96.7% mortality in H. logicornis nymph.