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문희성(Hui-Sung Moon),남윤우(Yun-Woo Nam),박재찬(Jae Chan Park),정효일(Hyo-Il Jung) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.11
For direct detection of microbes in air, samples have to be collected but environmental particles such as dust are also trapped in such samples. Therefore the isolation of target bacteria from non-biological materials of similar size is of great importance in the identification of such organisms. Dielectrophoresis is an emerging technique that can rapidly separate cells in microfluidics. In this paper we proposed a new method for the separation of airborne microbes using condensation and dielectrophoresis. This system could be used as a continuous flow through separation system for various particles and utilized as a pretreatment technique for microbe detection.
구강 악성 흑색종에서 PCNA 발현에 관한 면역조직화학적 연구
황경균,남윤우,이재일,이종호,심광섭,김명진 大韓顎顔面成形再建外科學會 2002 Maxillofacial Plastic Reconstructive Surgery Vol.24 No.6
Malignant melanoma arising from the mucosa of head and neck region was rare and showed poor prognosis. Some of malignant melanoma were transformed from benign melanotic lesion. Malignant melanoma had high cellular proliferation and rapid growth. The percentage of PCNA-positive cell (labeling index) is high in many malignant tumor. So we compared the pattern of PCNA expression in the melanotic lesion. We performed the immunohistochemical study in malignant melanoma(19 cases), benign melanotic macule(24 cases) and normal mucosa(20 cases) were diagnosed in Seoul National University Dental Hospital between 1980 and 2000. Positive PCNA staining was found mainly in malignant melanoma. The mean PCNA expression in malignant melanoma, melanotic macule, normal tissue were 29.2%, 1.4%, 0%, respectively. Significant differences in PCNA expression were noted between malignant melanoma and melanotic macule(p<0.01), normal mucosa(p<0.01). These result suggested that the PCNA expression seems to be used as a diagnostic indicator for malignancy in malignant melanoma and melanotic lesion.