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      • ION-SELECTIVE ELECTRODES OF FERRITE MEMBRANES

        원충택,박면용,오평제,이원,박기채 상명대학교 논문집 1993 상명대학교논문집 Vol.31 No.-

        산화제2철 또는 산화제2철과 마그네슘, 구리, 니켈, 혹은 아연을 몰비가 0.6:2.4, 0.8:2.2, 1:2, 1.2:1.8 및 1.4:1.6 (M:Fe, M=Mg, Cu, Ni, Zn) 인 혼합물로 Ferrite막 전극을 만들어 이온 선택성 전극으로 사용될 가능성을 연구하였다. 이들 전극막 재료는 각각 900, 1,000, 1,100, 1,200, 1,300, 및 2,614-2,700℃에서 소결되었다. 소결 온도가 높을수록 이온 감도와 선택성이 컸다. 산화제2철만을 사용하였을 때 보다 산화제2철을 Mg,Cu,Ni 또는 Zn과 혼합하여 2,164-2,700℃ 에서 소결된 전극들이 이온 선택성이 우수하였다. 이들 전극의 전기저항치는 10^2 메그옴정도이다. 모든 전극의 정전앞감응을 pH3 및 10사이에서 관찰하였는데, 은(I), 인산염(III), 인산일수소염(II), 인산이수소염(I) 및 비소(V, III)에 민감하게 감응되었다. 이들전극은 물속에 계속해서 담궈두면 내구도가 6개월 정도였다.

      • HPV에 감염된 자궁경부 상피세포의 Keratin 아형 변화에 관한 연구

        기근홍,이영미,장원재,임용,임성철,김창원,전호종 조선대학교 1994 The Medical Journal of Chosun University Vol.19 No.2

        The human papillomavirus (HPV) are wide spread in the world, causing proliferation of epidermal and mucosal surface. Certain papillomaviral types are oncogenic in vivo and in vitro. HPV DNA has been detected in most of cervical lesions such as condyloma acuminata, dysplasias, and invasive carcinomas. The materials for this study consisted of 5 dysplasias. 5 squamous cell carcinomas, and 5 exocervix for control, that resected for definite treatment of uterine disease at Chosen University Hospital from January, 1991 to December, 1993. All cases were performed of in situ hybridization for HPV DNA type 6/11, 16, and 18. And also immununohistochemical stain for panel of monoclonal cytokeratin (CK) antibodies were done. The result obtained is as fallows : 1. HPV DNA type 6/11 are detected in all dysplasias. HPV DNA type 16 and 18 are detected in squamous cell carcinomas. 2. Stratifed squamous epithelium of exocervix are positive staining for CK 1, CK 5/6, CK 8, CK 13, CK 14, and CK 19. HPV DNA type 6/11 infected cells are positive for CK 1, CK 13, CK 14, CK 17, CK 18, and CK 19. HPV DNA type 16/18 infected cells are positive for CK 1, CK 5/6, CK 10, CK 13, CK 14, CK 17, CK 18, and CK 19. In conclusion, HPV infection of uterine cervix is associated with change of normal cytokeratin expression pattern. Dysplastic cells are changed of CK 5/6, CK 8, CK 17 and CK18. Squamous cell carcinoma cells are changed of CK 8, CK 17, and CK 18.

      • 임베디드 리눅스 기반의 영상처리기법에 관한 연구

        원지운,정원교,홍원기,이용두 대구대학교 정보통신연구소 2004 情報通信硏究 Vol.3 No.1

        현재 embedded system에서 많은 기업체들이 리눅스를 채용하고 있고, 우리 생활에서 쓰이는 각종 전자기기, 정보가전, 제어장치 등에 적용되고 있다. 최근 멀티미디어 처리와 같은 점차 복잡한 기능이 요구되면서 임베디드 운영체제를 사용하기 시작하였고, 이러한 운영체제로 리눅스가 주목받게 되었다. 이는 가격 경쟁력뿐만 아니라 각 H/W에 따라 운영체제와 응용프로그램을 다양하게 변화시킬 수 있다. 본 논문에서는 CCD 카메라로부터 영상을 입력받아 압축하여 LCD 모니터에 출력하기 위한 임베디드 시스템 기반의 영상처리에 관해 기술한다. Recently, many industries adopts linux as an operating system for embedded system, which is commonly used in our life as the type of electronic machinery, electric home appliances and so on. The embedded operating system is getting more complex as lots of features such as multimedia are required. The operating system should be adjusted to the hard ware and software in order to satisfy a competitive price. In this paper, a operating system is discussed in order to compress the images form the CCD camera and then spread the LCD.

      • KCI등재후보
      • Alnico 8 型 硬質磁性材料의 磁氣的 性質에 미치는 添加元素의 影響

        徐圓根,金澤基,金潤培 忠南大學校 産業技術硏究所 1986 산업기술연구논문집 Vol.1 No.1

        In order to study the alloying elements effects on the magnetic properties in Alnico 8 (Fe-35Co-14Ni-7Al-5Ti-3Cu) permanent magnet alloy, some Alnico 8-type alloys which are different in composition of Ni, Cu, Ti and Al were prepared by induction melting. They were thermomagnetically treated at 740℃ - 840℃ for 3-15 min and then aged at 600℃ for 15hours. The magnetic properties and the optimum thermomagnetic treatment condition were investigated. The results were as follows ; 1) The region of the high temperature α phase, the zone of the solution treatment, is extended by Al and Ti, but that is reduced by Ni and Cu. 2) In the composition range of 10-14 wt.% of Ni, the coercive force decreases greatly with decreasing the Ni content with little change of the residual magnetization and the squareness of demagnetization curve. The optimum thermomagnetic treatment condition appeared at high temperature and short time with decreasing the Ni content. 3) In the composition range of 1-3wt.% of Cu, the coercive force decreases greatly with decreasing the Cu content, but the residual magnetization shows increasing tendency with decreasing the Cu content. The optimum thermomagnetic treatment condition appeared at low temperature and long time with decreasing the Cu content. 4) In the composition range of 5-8wt.% of Ti, the coercive force increases with increasing the Ti content, but the residual magnetization decreases with increasing Ti content. The optimum thermomagnetic treatment temperature was not dependent on the Ti content, but the optimum thermomagnetic treatment time appeared at long time with increasing the Ti content.

      • Cytarabine이 마우스 간장의 Alkaline Phosphatase와 Adenosine Triphosphatase 활성 세포의 조직화학적 분포에 미치는 영향에 관한 연구

        배기원,양영철,하미혜 인제대학교 1988 仁濟醫學 Vol.9 No.3

        미정맥으로 투여된 Cytarabine은 마우스 간장의 효소 분포 양식에 영향을 미쳐 투여 4시간군부터 alkaline phosphatase의 활성이 문맥관 주변부와 중간대 간세포에서 감소되기 시작되어 투여 8시간군에서는 현저히 저하되었고 adenosine triphosphatase 활성은 이때부터 중심정맥 주변부와 중간대 간세포에서 증가되었으며, alkaline phosphatase의 활성 감소는 투여 24시간군까지 지속되었으나 adenosine triphosphatase의 활성 증가는 24시간군에서 정강으로 회복되었다. This experiment was carried out to investigate the effect of cytarabine on the distribution pattern of the hepatic alkaline phosphatase and adenosine triphosphatase in mouse. The experimental animals were administered with single dose of cytarabine, 1.6 mg/kg, by the intravenous injection. The following results were obtained. 1.In the normal hepatic lobule of mouse, the alkaline phosphatase activity was concentrated particularly in the portal canal and the midzonal area. And the adenosine triphosphatase appeared to the mild activity in the overall area. 2.The activity of alkaline phosphatase began to be slightly decreased from the 4 hours and appeared to be markedly decreased at the 8 hours in the portal canal and midzonal area. And the activity of adenosine triphosphatase began to be markedly increased from the 8 hours and recovered to the normal state at the 24 hours in the central area and midzonal area.

      • 이담자균 효모의 성분화 과정중 인지질의 작용과 배지조성의 제한이 성분화에 미치는 영향

        정영기,강원대,남수완 동의대학교 기초과학연구소 1997 基礎科學硏究論文集 Vol.7 No.1

        The action of phospholipid on the rhodotorucine A(Rh.A) acceptance by heterobasidiomyceteous yeast Rhodospori-dium toruloides mating type a cells and the effect of medium composition during sexual differentiation were investigated. Activation of trigger peptidase(TPase) was very sensitive to the originated phospholipid from R. toruloides and was more sensitive to phospholipid liposome made up of phospholipid. Phospholipid present on the membrane of mating type a cells consists of phospatidylglycerol(PG), phosphatidylethanolamine(PE), phospatidylcholine(PC), phospatidylinositol(PI), and phosphatidylserine(PS) of 12.9, suprisingly 45.4, 11.0, and 13.9%, respectively. As the result of using C-1 and N-1 mediums which limited C and N sources capable of inhibiting the synthesis of phospholipid. it resulted inhibiting sexual differentiation and production of Rh.A from mating type A cells.

      • 韓國 Drosophila 屬內 16種에 對한 遺傳的 近緣關係

        成耆昌,서민철,金源澤,金溶聲 성균관대학교 기초과학연구소 1987 論文集 Vol.38 No.2

        Eleven allozymes from sixteen species of Drosophila were analyzed by using horizontal starch gel electrophoresis in order to estimate genetic relationship among these species. All eleven allozymes were present in all sixteen species examined, and some commom alleles were also detected. The mean genetic identity between inter-and intra-subgenus Drosophila were estimated to be 0.16∼0.20, and 0.24∼0.28, respectively. The results showed that D. nigromaculata, which belongs to subgenus Drosophila, had closer genetic relationship to the species in subgenus Sophophora than to Drosophila. High mean genetic identity was also observed between subgenus Hirtodrosophila and Drosophila, and between subgenus Paradrosophila and Sophophora. Results of Nei's genetic identity test of the present data generally agreed with the previously known Drosophila classification establised based on the cytological and morphological characteristics.

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