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이재성,이재성,김보미,Leda Mirbahai,Angela Mally,J. Kevin Chipman 한국유전학회 2016 Genes & Genomics Vol.38 No.1
DNA methyltransferases (DNMTs) are an enzyme family that catalyzes the transfer of a methyl group to DNA for a wide variety of biological functions. To determine whether the number and composition of the Dnmt gene family affects the 5-methylcytosine (5mc) ratio at the genome level, genome-wide 5mc ratios from three marine animals, the mangrove killifish (Kryptolebias marmoratus), an intertidal copepod (Tigriopus japonicus), and a monogonont rotifer (Brachionus koreanus), were analyzed in each organism after the cloning of Dnmt genes. Lineage- and teleost-specific gene evolution was observed in the vertebrate Dnmt3 gene family, while unique gene expansion was found in the T. japonicus Dnmt1 gene family. However, the rotifer did not have any apparent homologue of Dnmt1 or Dnmt3 in its genome. This gene information was highly supportive of genome-wide 5mc levels in the three marine animals. Therefore, the absence or presence of the Dnmt gene family could be an important evolutionary parameter of how this could affect genomewide epigenetic metabolism.
이재성,한스-우베 담스,최범순,이재성,최익영 한국유전학회 2012 Genes & Genomics Vol.34 No.4
Microcystins are cyanobacterial hepatotoxins, and are produced by nonribosomal enzyme complexes, mcy gene cluster. In this study, we report on whole mcy gene clusters from two Korean strains of M. aeruginosa that were blooming in Lake Paldang (FCY-26) and Geum river (FCY-28). Their specific gene locus, amino acid information, and sub-cluster orientation were also characterized in both strains. Both gene clusters are of 55 kb, and also each length, number and the arrangement are identical. Their sequence analysis revealed a cluster of 10genes (mcyA, B, C, D, E, F, G, H, I, and J) involved in the biosynthesis of microcystin, and mcyABC and mcyDEFGHIJ formed two polycistronic operon structures that are transcribed bidirectionally from a central promoter region between mcyA and mcyD. The analysis of SNPs provided different nucleotide composition and amino acid variations in two Korean strains of M. aeruginosa. This approach is useful to develop genetic indicators identifying toxic cyanobacteria and their cyanotoxins,and helpful for a better understanding of the diversities of mcy gene clusters, the biosynthesis of microcystin, and the mediation of environmental parameters causing algal blooming and HABs.
미량의 코발트 첨가가 W-Cu 전기 접점재의 성질에 미치는 영향
이재성,문인형 대한금속재료학회(대한금속학회) 1977 대한금속·재료학회지 Vol.15 No.2
高負荷能을 갖는 W-Cu系 전기 접점재의 미량의 Co를 첨가함으로서 얻어지는 諸使用特性의 變化를 單純W-Cu系와 또 미량의 Ni을 첨가한 경우와 對比 조사하였다. W-Cu-Co (tr.)系는 W-Cu-Ni (tr.)系나 W-Cu系에 比하여 旣發表한 바와 같은^(1)) 燒結 및 溶侵時에 보여주는 有利한 製造上의 特性이외에도 그 전기적특성에 있어서도 뚜렷한 개선을 보여주었다. W-Cu-Co(tr.) 系는 同一한 使用條件아래에서 W-Cu나 W-Cu-Ni (tr.)系에 比하여서 보다 낮은 接觸抵抗과 contact erosion 율을 보였다. 이와 같은 낮은 contact resistance나 contact erosion 현상은 W-Cu-Co 系에서도 W-Ag-Co에서와 같이^(2,3)) Co_7W_6 金屬間化合物이 W粒子주변에 형성되어 접점저항의 증가를 가져오는 복잡 산화물의 형성을 저지하기 때문이라 생각된다. ※^(1)) 李載星, 文仁炯 : 大韓金屬學會, 1976年度秋季學術發表會서 "미량의 코발트 첨가가 W-Cu 전기 접점재의 수축거동에 미치는 영향"발표(同學會誌 14권 4호의 초록 발표) ※^(2)) Kabryamc, et al: PMI 5 (1973) 122 (3) I.H. Moon and W.J. Huppmann: PMI 6 (1974) 190.
이재성,최선미,안춘모,유영상,J.S. Lee,S.M. Choi,C.M. Ahn,Y. Yoo 한국전자통신연구원 2023 전자통신동향분석 Vol.38 No.4
Cyberspace is emerging as a critical domain requiring national-level governance and international cooperation owing to its potential financial and societal impacts. This research aims to investigate the cybersecurity policies from major countries for understanding with comprehensive perspectives. Global trends emphasize a comprehensive command-centered approach, with top leadership directing cybersecurity policies. Key policy areas include security across technology ecosystems, protection of critical infrastructure, and software supply chain security. Investment is being focused on zero-trust architectures, software bills, and new technologies like artificial intelligence. For countries like Korea, immediate response and adaptation to these trends are crucial to develop and enforce national cybersecurity policies.
이재성 대한영어영문학회 2003 영어영문학연구 Vol.29 No.1
The Levinasian way of presenting the ethical difference between the self and the Other (a human as the absolutely other) is essentially linked with the quest for the knowledge of the unknowable, God, but in a radically different way from onto-theological methodologies traditionally accepted in the West. Heidegger claims that philosophy has run its course, and that the task remaining for the thinker at the end of philosophy is to think what really presents the presence of the present of beings. Yet Heidegger faces a dilemma as he speculates on what makes possible the presence in terms of the truth and unconcealment of the truth, which still are words of logocentrism. Derrida claims that the other is an alterity that exceeds the ontological account of the alternative of presence and absence. But Derridian deconstruction fails to acclaim the particular otherness of a human as the Other. Levinas, in claiming that there is the ethical dimension between the self and the Other, definitely goes against the grain of entire tradition of Western philosophy, which he defines ontological. In this Levinasian light, the task of a literary criticism is to catch the overflowing of finite thought of a given literary work directed toward the infinite, and this work would be to trace the alterity of the text by questioning the totalizing theme of the text.<Pusan National University> .
이재성,김진학,김경훈,이우태,이원석,차승균 대한골절학회 1992 대한골절학회지 Vol.5 No.2
The injuries of ankle in children occur mostly at the bony structure rather than ligamentous one, and some injuries of the growth plate may result in the arrest of entire growth an these may result to leg length discrepancy or deformity. Accurate treatment under the knowledge of injury mechanism is very important. We have reviewed 30 cases of children's ankle fracture treated our clinics from Jan. 1987 to Dec. 1990. The results are as follows; 1. Traffic accident was most common cause o( injury (50.0%). 2. According to Dias & Tachdjian classification, Supination-Invertion type was most common (ll cases). 3. The treatments performed were closed reduction & cast immobilization for 11 cases (36.7%), closed reduction 4. percutaneous pinning for 3 cases (10.0%), and open reduction k internal fixation for 16 cases (53.3%). 4. Among open reduction k internal fixation group, only 1 case (pronation-eversion-external rotation type) show angular deformaity. 5. For the prevention of complications, accurate reduction and adequate fixation was desired.
허실변증(虛實辨證)과 가미청상보하탕(加味淸上補下湯)의 임상효과
이재성,정승연,이건영,이경기,정희재,이형구,정승기,최준용,Lee, Jae-Sung,Jeong, Seung-Yeon,Lee, Kun-Young,Lee, Kyung-Ki,Jung, Hee-Jae,Rhee, Hyung-Koo,Jung, Sung-Ki,Choi, Jun-Yong 대한한방내과학회 2004 大韓韓方內科學會誌 Vol.25 No.3
Objectives: The aim was to compare and analyse the clinical effects between excess syndrome and deficiency syndrome in asthmatics through treatment with herbal dicoction, Gamichuongsangboha-tang. Materials and Methods: The subjects consisted of 30 patients with asthma and were treated with Gamichuongsangbohatang for four weeks. All patients were divided into three groups as Excess Syndrome Group(ESG), Deficiency Syndrome Group(DSG) and Coexistence Syndrome Group(CSG). PHs were checked before and 4 weeks after treatments, and QLQAKAs were checked three times; before treatments, 2 and 4 weeks after treatments. The results of QLQAKA and PH were compared and analysed between ESG, DSG and CSG. Results: Treatment of Gamichuongsangboha-tang resulted in a significant increase of QLQAKA during the first two weeks in DSG and during the last two weeks in ESG. FEV1% and PEFR% significantly increased in both DSG and ESG. There were no significanctly changes of QLQAKA and PH in CSG. Conclusions: Observations suggest that asthma in DSG was more immediately and effectively managed through treatment with Gamichuongsangboha-tang than in ESG and CSG in ease of breading and pulmonary function.