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Human Lymphocytes 에 있어서 염색체 이상의 좌위(座位)와 복제 pattern
김무연 한국유전학회 1979 Genes & Genomics Vol.1 No.1
The relationship between DNA replication patterns and chromosome breaks is studied by BUdR labelling. Chromosome breaks can be induced specifically in the S-phase by incorporation of BUdR. The distributions of predilection sites of chromosome breakages both by X-ray induced and translocation cases are shown. Break points are distributed 1:2 by translocation and 3:5 by X-ray induced cases between G-and R-bands. The frequency of break points by X-ray induction is highly correlated to the relative length of chromosomes (r = 0.84) however relatively less correlated patterns are shown by translocation cases (r = 0.51).
김무연,김재웅,Kim Moo-Yeon,Kim Jae-Woong 대한용접접합학회 2004 대한용접·접합학회지 Vol.22 No.6
In this study, a visual sensor system which can detect I-butt weld joint with height variation and includes a seam tracking algorithm was investigated. Three-dimensional position of an object can be acquired by using the method of distance measurement, i.e., an optical trigonometry which results from the spatial relations between the camera, the object and the structured light by a visible laser. Effects of laser intensity and iris number for the image quality as well as object material were investigated for the optical system design. For the image processing, a region of interest is defined from the whole image and a line image of laser is drew by using the gray level difference in the image. From the drew laser line, the weld joint can be recognized in searching the biggest point position calculated from the central difference method. Through a series of welding experiments, a good tracking performance was confirmed under GMA welding.
가토에서 트리암시놀론 유리체내 주사가 국소 망막박리에 미치는 영향
김무연,이영춘,박영훈 대한안과학회 2008 대한안과학회지 Vol.49 No.4
Purpose: To investigate the effect of localized retinal detachment on both the detached and attached regions, and to determine the effect of triamcinolone on Müller cell gliosis. Methods: Pars plana vitrectomy was performed in both eyes of 12 pigmented rabbits. A dome‐shaped retinal detachment was made by injecting sodium hyaluronate into the subretinal space. Triamcinolone (5 mg) was applied intravitreally to one eye (12 eyes). The detached retinal area and the neighboring attached region were studied by light and electron microscopy 3, 7, and 28 days after surgery. Tissues were prepared in 5 um sections for hematoxylin-eosin staining and immunohistochemistry with antibody to glial fibrillary acidic protein (GFAP). Results: In addition to the well-known degeneration of photoreceptor cells in the detached retina, an incomplete but severe loss of ganglion cell axons occurs in both the detached and the attached regions. The total retinal thickness gradually decreased in the detached areas, while the thickness of the inner retinal layers remained virtually unchanged over several weeks. Gliotic alterations were apparent in both the detached and non-detached retinal areas, and intravitreal triamcinolone did not alter these gliotic alterations of Müller cells. Conclusions: It is noteworthy that progressive retinal destruction also occurs in the attached retina after local detachment. This may account for visual impairment in strikingly large areas of the visual field, even after retinal reattachment.