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안중진,김관식,정동균 대한구강생물학회 1989 International Journal of Oral Biology Vol.13 No.2
To study the osteogenic capacity of rat calvarial cell populations, 5 bone cell populations were prepared from fetal rat calvaria by sequential enzyme digestion. After primary culture for 6-7 days each bone cell population was collected and resuspended at 0.5-1×10^6 cells/35mm culture dish and allowed to attach overnight. Cells were grown in α-MEM plus 15% FBS with or without 50㎍/ml ascorbic acid, 10mM β-glycerophosphate or 10^-7M dexamethasone for 23 days. After long-term culture, the cell layer was fixed with neutral buffered formalin and stained with von Kossa stain. The von Kossa positive nodules were counted. The observed results were as follows. 1. Nodule formation was begun after 7-10 days of culture and was increased with culture periods. 2. Mineralized bone nodules, positive for von Kossa stain, were formed only in population IV and V when cultured in media supplemented with 50㎍/ml ascorbic acid and 10mM β-glycerophosphate. 3. Mineralized nodule was not formed in all bone cell populations when cultured in media supplemented with ascorbic acid or β-glycerophosphate only. 4. Dexamethasone (10^-7M) increased significantly the formation of bone nodule in population IV and V. These results indicate that enzymatically released calvarial cells can form mineralized bone nodules in vitro, and along with biochemical data suggest that population IV and V express the osteoblastic phenotype.
안중진 ( Joongjin Ahn ),최종선 ( Jongsun Choi ),김범수 ( Bumsu Kim ),최재영 ( Jaeyoung Choi ),유재우 ( Chaewoo Yoo ) 한국정보처리학회 2009 한국정보처리학회 학술대회논문집 Vol.16 No.1
최근 비지니스 프로세스를 위한 워크플로우 기술에 상황 인지 기능을 추가하여 유비쿼터스 컴퓨팅 환경에 적용하려는 연구가 활발히 진행되고 있다. 그러나 기존의 상황인지 기반 워크플로우 언어들은 Sequence Control-Flow 패턴과 같이 하나의 서비스만을 지원하는 단일 워크플로우 수준에 머물러 있었다. 이에 본 논문에서는 Parallel Split Control-Flow 패턴과 같이 동시에 하나 이상의 서비스를 지원하기 위해 uWDL 을 확장한 언어 구조를 제안한다. 제안하는 언어 구조는 다중 워크플로우에서 플로우 간 공통으로 사용하는 변수를 모아놓은 데이터 구조를 기반으로 다중 워크플로우 서비스를 지원한다.
上顎骨 前方部 部分 骨折斷術後 齒髓 神經纖維 再生에 關한 組織學的 硏究
안중진(Jung Jin An),조병욱(Byoung Ouck Cho) 대한구강악안면외과학회 1995 대한구강악안면외과학회지 Vol.21 No.3
The segmental osteotomy is one of the commonly used surgical procedure for the treatment of various dentofacial deformities involving the maxilla. Common complication after osteotomy was stabilization, inflamation, relapse, paresthesia, necrotic change of fragment and pulpal degeneration. The condition of the pulp after segmental maxillary osteotomics in human has only been studied in a few clinical investigations. Many investiga+ors believe that subsequent reinnervation and vascularization is accomplished, however, few clinical studies have been directed at evaluating this phenomonen. Conflicting results have also been reported of tooth response after segmental osteotomy procedures in the maxilla. Studies in patients show the incidence of non-responsive teeth to electrical stimulation varying from 6 to 43%. Animal studies have also reported wide variation in the effect on the pulp, varying from nil to marked cellular changes by 13e11(1969), Poswillo(1972), Ohzeki & Takahashi(1980) and Nanda(1982). The purpose of the present study was to determine the degeneration and reinnervation of pulpal nerve fiber after the segmental maxillary anterior osteotomy. The reinnervation of anterior maxillary teeth (]enervated by segmental osteotomy has been investigated in clogs by using light and electron microscopy, The extracted teeth from segmental fragment were cut off at right angle to the long axis of the tooth at the apical 1 mm portion on 1, 2, 4, 8, 24 weeks after osteotomy. The following observation were made : 1. One week after osteotomy, most pulpal axon showed sign of degeneration and decreased the number about 74% axons compare with control group. 2. Two weeks after osteotomy, only alomost intact two myelinated fibers and few degenerated unmyelinated fibers were presented. 3. Four weeks after osteotomy, all axons were disappeared. 4. Eight weeks after osteotomy, a myelinated and unmyelinated axon were presented. 5. Twenty four weeks after osteotomy, numerous myelinated and unmyelinated axons were presented. The total axons were about 33% of control group. The ratio of unmyelinate axon was about 45%.
안중진(Jung-jin ahn),최종명(Jong-Myung Choi),조용윤(Yong-Yoon Cho),유재우(Chae-Woo Yoo) 한국정보과학회 2008 한국정보과학회 학술발표논문집 Vol.35 No.1
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