http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
정수열,이희영,최용락 東亞大學校附設遺傳工學硏究所 1995 遺傳工學硏究 Vol.- No.2
CRP에 변이가 도입된 crp*¹ 유전자를 통하여 cloning된 sfs(sugar fermentation stimulation)유전자 중 nlp와 sfs4 유전자가 maltose 및 maltodextrin의 운반에 관여하는 유전자들 중에서 MalE 단백질을 증가시킴을 immunoblotling을 통하여 확인했다. 즉 MalE 단백질은 periplasmic에 존재하면서 cytoplasmic membrane에 존재하는 MalFGK 단백질과 반응하여 cytoplasm내로 maltose, maltodextrin을 운반하는 MBP(maltose binding protein)로 밝혀져 있다. Most crp* mutants isolated so far were capable of fermenting lactose despite the absence of cAMP, however, they could ferment other sugar such as maltose in the presence of cAMP. nlp and sfs4 genes, which stimulated the maltose metabolism in a crp*¹, cya::km(MK2001) host system. Especially, MalE protein(malE gene: MBP: maltose binding protein), that is transport protein with maltose and maltodextrin in periplasmic, were increased in the cloned with nlp and sfs4 genes.
최용락,고병수,박명찬,Choe, Yong-Rak,Ko, Byong-Su,Park, Meong-Chan 대전대학교 군사연구원 2003 군사학연구 Vol.1 No.-
While the social activities using Internet become generalized, the side effect of the information security violation is increasing steadily and threaten the countries which is not ready to prevent from offensive penetration such as the Information-fighter or Cyber-military. In this paper, we define the concept and characteristics of the modern Information-Warfare and analyze various kinds of threatened elements and also examine the recent trend in other countries. And introducing Computer Forensics raised recently for the confrontation against the security violation in the future, we will show the developing strategies and the necessity in order to response cyber attacks. These developing strategies can be used to ensure and re-trace the technical evidence for the security violation and to achieve the disaster relief effectively. So we hope that can apply them to the actual preparation through developing cyber trial test of the defense and attack for the Information-Warfare.
분산 시스템 환경의 인증 서비스 및 실체 인증 메커니즘 분석
최용락 大田大學校 産業技術硏究所 1996 산업기술연구소 論文集 Vol.7 No.2
A distributed system is susceptible to a variety of security threats mounted by intruders as well as legitimate users of the system. This paper deals with authentication services in a distributed system. By reviewing some basic authentication requirements and comparing several authentication schemes, we can make the consideration of main design issues for a complete cryptographic-based authentication mechanism. In this paper, the various types of masquerade and replay attacks among the communication entities are analyzed in the related authentication mechanism such as Kerberos, X.509, Difffie&Hellman, PGP and SPX.
Anatase TiO$_2$박막의 미세조직이 광촉매 효과에 미치는 영향
최용락,김선화,Choe, Yong-Rak,Kim, Seon-Hwa 한국재료학회 2001 한국재료학회지 Vol.11 No.7
$TiO_2$광촉매릉 반응성 스퍼터링법을 이웅하여 박막으로 제조하고 유기물 및 살균실험을 통하여 미세조직이 광촉매 효율에 미치는 영향을 조사하고자 하였다. 광촉매 효율측정을 위하여 페놀분해실험 및 E.coli 078을 이용한 살균실험을 행하였다. $TiO_2$박막에 의한 페놀분해실험 시, 전자수용체인 산소의 공급에 의하여 분해효율이 2배까지 증가하였다. E.coli 078분해실험의 경우, 광촉매 $TiO_2$박막을 사웅하여 살균하였을때 UV만 조사하여 살균하였을 경우 보다 분해효율이 최고 70% 이상 증가하였다. 페놀분해실험과 E.coli 078 살균실험 결과 저결정성 박막의 경우 분해능이 매우 미약하였으며, 표면조도가 높고 결정성이 우수한 박막의 경우에 높은 광촉매 효율을 나타내어$TiO_2$박막의 광촉매 효과는 표면형상과 결정성이 매우 중요한 인자로 작용하였다. Anatase $TiO_2$thin films as a photocatalyst were prepared by the reactive magnetron sputtering process. The $TiO_2$thin films were deposited on Si substrates under the various conditions : oxygen partial pressure, working pressure, sputtering time, and D.C. power. The photocatalystic degradation of $TiO_2$thin film have been studied to examine the contribution of surface morphology and crystallinity. The thin films with a good crystallinity or a rough surface showed a high photocatalytic degradation rate on phenol and E.coli 078 experiment. Compared with that of only UV radiation, the photocatalytic efficiency of $TiO_2$thin film under the UV radiation and the $O_2$ flow increased. We found that the crystallity and the morphology were the important factors on the photocatalytic efficiency of TiO$_2$thin film.
Serratia marcescens에서 cAMP receptor protein(CRP)유전자의 클로닝 및 해석
유주순,문종환,정수열,김혜선,최용락 東亞大學校附設遺傳工學硏究所 1999 遺傳工學硏究 Vol.- No.6
전사조절인자로서 잘 알려져 있는 cAMP receptor protein(CRP)은 cAMP와 DNA에 결합하는 특별한 활성을 가지고 있으며, cAMP-CRP complex를 형성하여 수많은 유전자의 발현조절에 관여한다. 이러한 측면에서 cAMP-CRP의 조절은 어떤 면에서 총체적 조절체계라고까지 한다. 본 연구는 Serratia 균주에서 crp유전자의 분자적 특성 및 cAMP에 의한 발현조절을 받는 분자기구를 해석하고자 유전자를 클로닝하고 발현을 확인하였다. MacConkey배지에서 maltose를 탄소원으로 충분히 이용하지 못하는 대장균 TP2139(△crp,△lac)를 숙주로 이용하고, 염색체DNA를 library로 작성하여 얻은 형질전환체 약 일만개의 콜로니에서 red colony를 나타내는 5종류 의 양성 클론을 얻었다. 이들 클론을 Southern방법으로 확인한 결과 3kb의 단편을 가진 pCKB12클론이 crp유전자를 coding하고 있음을 확인하였다. glpD-lacZ 융합 plasmid인 pLDC6 의 BamHI부위에 pCKB12의 3kb 단편을 삽입시킨 재조합 plasmid pLDC 6-Scrp를 작성하여, 클로닝된 Serratia 의 crp 유전자가 대장균에서 유전자 전사조절에 미치는 영향을 확인한 결과 cAMP-CRP 복합체 형성에 의한 전사조절 기능이 확인되어졌다. One of the better-characterized transcription factor of E. coli is the cAMP receptor protein(CRP) and the CRP binds cAMP and DNA. The cAMP-CRP complex is involved in regulation of many genes at bacteria. The cAMP-CRP regulatory element represents, in some respects, a global regulatory network. The aim of this work was to study the structure and the mechanisms controlling the expression of CRP in Serratia marcescens. We have been get 5 different clones from Serratia which stimulated the cells to use maltose as a sole carbon source in E. coli TP2139. The crp gene clone, pCKB12, was confirmed by Southern hybridization with E. coli crp gene. The location of the crp gene was determined by constructing subclones carrying various portions of pCKB12. To investigate the potential role of CRP in E. cloi, lacZ fused plasmids were constructed and investigated the β-galactosidase activity of the fused plasmid. The Serratia marcescens cAMP receptor protein can substitute the E. coli CRP in transcriptional activation at the lacZ gene. These results suggest that Serratia marcescens cAMP receptor protein complex functions to regulate several promoters in E. coli.
반응성 스퍼터링법으로 제조된 anatase TiO$_2$박막의 미세조직에 관한 연구
최용락,김선화,이건환,Choe, Yong-Rak,Kim, Seon-Hwa,Lee, Geon-Hwan 한국재료학회 2001 한국재료학회지 Vol.11 No.9
Anatase $TiO_2$ thin films as a photocatalyst were prepared by the D.C reactive magnetron sputtering process. The $TiO_2$ thin films were deposited on Si(100) substrates under the various conditions : oxygen partial pressure, working pressure, substrate temperature, D.C power, and deposition time. The morphology of the TiO$_2$ thin films showed an island structure. At early stages of film growth, amorphous phase formed. However, during the further growth, columnar crystalline $TiO_2$grains evolved. The crystallinity of the thin films depended on the oxygen partial pressure, the working pressure and the D.C. powers.