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인체양막을 이용한 백서 구강점막 결손부에 대한 생물학적 처치
윤영수(Young Soo Yun),류선열(Sun Youl Ryu),이은주(Eun Joo Lee) 대한구강악안면외과학회 1990 대한구강악안면외과학회지 Vol.16 No.3
The purpose of this study was to determine whether use or not human amniotic membrane as a biological dressing for the oral mucosal defects and to compare healing capacity of dry and fresh amniotic membrane. Sixteen rats weighing about 250-300gm were divided into two groups. In group A, the buccal mucosal defect of the left side was allowed secondary epithelization and the right defect was grated with the mucosa taken from the contralateral side. In experimental group B, the left defect was covered with dry amniotic membrane and the right side with fresh amniotic membrane. The animals were sacrificed on the 2nd, 5th, 10th and 20th day after grafting for macroscopic and microscopic examination. The results obtained from this study were as follows : 1. The healing rate of the covering group with amniotic membrane was faster than that of denuded group. 2. The inflammatory response of the covering group with amniotic membrane was less than that of denuded group. 3. In epithelization, the covering group with amniotic membrane was better and faster than denuded group. 4. In inflammatory response and healing process, there were no significant differences between dry and fresh amniotic membrane. 5. The healing rate of the mucosal graft group was faster than that of the others and inflammatory response of the mucosal graft group was a little than that of the others. As above results, it is considered that amniotic membrane is possible to use as biological dressing materials on the oral mucosal defect for wound protection and reepithelization.
3D 시뮬레이션 도구를 이용한 자동차부품조립라인의 생산성 분석
윤영수(Young Soo Yun),서승록(Seung Lock Seo),이수철(Soo Cheol Lee) 대한설비관리학회 2000 대한설비관리학회지 Vol.5 No.1
N/A In this article, a simulation model of a car parts assembly line is developed to improve system performances such as worker's utilization, producivity, etc. this simulation model has been developed using QUEST, a 3D discrete-event simulation tool that is
윤영수(Young Soo Yun),유선열(Sun Youl Ryu),김원재(Won Jae Kim) 대한구강악안면외과학회 1998 대한구강악안면외과학회지 Vol.24 No.4
Endogenous nitric oxide (NO) has been known to regulate the salivary secretion and glandular blood flow. However, the distribution of nitric oxide synthase (NOS) responsible for NO synthesis has not been well studied in salivary glands. The present study was aimed to investigate the distribution of nitric oxide synthase isoforms (endothelial, neuronal, and inducible NOS). Immunohistochemistry, using monoclonal mouse anti-endothelial NOS, anti-neuronal NOS, and anti-inducible NOS, was performed in 3 major salivary glands (parotid, submandibular and sublingual gland) of the rat. Endothelial NOS (eNOS)-positive immunoreactivity was observed in arterial endothelium, striated duct, granular convoluted duct of the submandibular gland, intercalated duct, and mucous acinar cells of the sublingual gland. The eNOS-positive immunoreactivity was most prominent in the arterial endothelial layer and that of the striated and granular convoluted duct was well concentrated in columnar epithelial layer. In the intercalated duct and mucous acinus, eNOS-positive immunoreactivity was weakly detected. Neural NOS (nNOS)-positive immunoreactivity was observed in submandibular ganglion, autonomic postganglionic fiber, striated duct, granular convoluted duct, and intercalated duct. nNOS-positive immunoreactivity of the submandibular ganglion and autonomic postganglionic fiber was most prominent and that of the ductal system was well concentrated in the epithelial layer. eNOS or nNOS-positive immunoreactivity was not detected either in excretory ducts or in serous acinar cells. Inducible NOS-positive immunoreactivity was not detected. There results reveal the presence of eNOS and nNOS in the salivary gland, which may be related with regulation of the glandular secretion and blood flow through synthesis and secretion of NO.