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백서의 실험적 치아 이동시 substance P 및 calcitonin gene-related peptide에 관한 면역조직화학적 연구
전인섭,김상철 원광대학교 치의학연구소 1997 圓光齒醫學 Vol.7 No.1
Neurotransmitters have been suggested to play regulatory roles in alveolar bone remodeling which was induced by orthodontic force. This 'study was designed to evaluate the expression of neuropeptide in periodontal tissue during the experimental movement of rat incisors, by the method of LSAB(labelled streptavidine biotin) immunohistochemical staining for substance P(SP) and calcitonin-gene related peptide(CGRP). Twenty seven Sprague-Dawley rats were divided into a control group (3 rats), and 6 experimental groups (24 rats) where 75g of force was applied by helical springs across the maxillary incisors. Rats of experimental groups were sacrificed at 12 hours, 1, 4, 7, 14 and 28 days after force application, respectively. And the tissues of a control group and experimental groups were studied immunohistochemically. The results were as follows : 1. In control group, the expression of SP was rare in gingiva, dentin, and periodontal ligament, and was mild in pulp and cementum, which was similar to the expression of CGRP. 2. There was no difference in the expression of SP or CGRP in dentin, cementum, odontoblasts, between control group and experimental groups. 3. The expression of SP and CGRP was increased in a number of fibers in pulp, periodontal ligament and gingival epithelium of experimental groups. 4. The expression of SP and CGRP in the pulp, periodontal ligament, gingiva was increased in 1 day through 4 days after force application, and then was decreased. But, there was still higher SP or CGRP expression than that of control group even in 28 days after force application. 5. Although the expression of neuropeptide was found in both sides of periodontal ligament, it was greater in pressure side than in tension side in 4 through 7 days. And the expression of SP was greater than that of CGRP.
DEVELOPMENT OF AN OPERATION STRATEGY FOR A HYBRID SAFETY INJECTION TANK WITH AN ACTIVE SYSTEM
전인섭,강현국 한국원자력학회 2015 Nuclear Engineering and Technology Vol.47 No.4
A hybrid safety injection tank (H-SIT) can enhance the capability of an advanced powerreactor plus (APRþ) during a station black out (SBO) that is accompanied by a severe accident. It may a useful alternative to an electric motor. The operations strategy of the H-SIThas to be investigated to achieve maximum utilization of its function. In this study, themaster logic diagram (i.e., an analysis for identifying the differences between an H-SIT anda safety injection pump) and an accident case classification were used to determine theparameters of the H-SIT operation. The conditions that require the use of an H-SIT weredetermined using a decision-making process. The proper timing for using an H-SIT wasalso analyzed by using the Multi-dimensional Analysis of Reactor Safety (MARS) 1.3 code(Korea Atomic Energy Research Institute, Daejeon, South Korea). The operation strategyanalysis indicates that a H-SIT can mitigate five types of failure: (1) failure of the safetyinjection pump, (2) failure of the passive auxiliary feedwater system, (3) failure of thedepressurization system, (4) failure of the shutdown cooling pump (SCP), and (5) failure ofthe recirculation system. The results of the MARS code demonstrate that the time allowedfor recovery can be extended when using an H-SIT, compared with the same situation inwhich an H-SIT is not used. Based on the results, the use of an H-SIT is recommended,especially after the pilot-operated safety relief valve (POSRV) is opened.
전인섭,김상철 대한치과교정학회 1992 대한치과교정학회지 Vol.22 No.2
The purpose of this study was to examine the displacement of glenoid fossa during growth, and to investigate the relationship between the displacement of glenoid fossa and mandible. Pretreatment and posttreatment lateral cephalograms of 41 patients (male : 13, female : 28) were obtained from the orthodontic clinics of WonKwang university hospital and were analized in terms of the position of articulare and mandible and statistically. The obtained results were as follows ; 1. Articulare was displaced posteriorly and inferiorly during craniofacial growth and development. 2. The more posteriorly articulare displaced, the less anteriorly pogonion displaced, but the more inferiorly menton displaced. 3. The more posteriorly or inferiorly articulare was located, the more inferiorly menton displaced, and the more posteriorly articulare was located posteriorly, the less cant of the mandibular plane.
Inconel 600 및 690 튜브 재질의 일반 부식에 관한 실험적 연구
염유선,황정래,전인섭,김숭평,윤장희,Yeom Yu-Sun,Hwang Jung-Lae,Jun In-Sub,Kim Soong-Pyung,Yoon Jang-Hee 한국방사성폐기물학회 2006 방사성폐기물학회지 Vol.4 No.2
By executing corrosion experiment on Inconel 600, 690 used to material of S/G tube in domestic NPP, this paper show estimation of amount of product such as Co-58, Co-60, Cr-51, Mn-54, Fe-59 which are main exposure cause to the workers in NPP. Therefore, Making the 12 samples consisted of Inconel 600, 690, whole corrosion experiment was carried out for 60 days(each pH by 20 days). The conditions of those tests were similar or more harsh than actual conditions of domestic NPP. The Glow Discharge Spectrometer(GDS) was used for quantitative analysis of results. The results of using GDS, the Inconel 600 corrodes more than Inconel 690 at pH 7 and pH 9. However, it is observed that Inconel 690 corrodes more than Inconel 600 at pH 4. Those results is estimated that test sections had the effect of transient. The long terms of experiment is required to minimize and solve the problem.
백서의 실험적 치아 이동시 교원질 발현에 관한 면역조직화학적 연구
김상철(Sang-Cheol Kim),전인섭(In-Seop Jeon) 대한치과교정학회 1996 대한치과교정학회지 Vol.26 No.4
견인력에 의한 치아 이동시 전반적인 치주 조직의 변화를 관찰하고 특히 제1형 교원질의 발현 정도 및 분포의 변화를 알아보고자 Sprague-Dawley계 백서 21마리를 대상으로 대조군(3마리)과 실험군(18마리)으로 나누었으며, 실험군은 양 중절치 사이에 견인력(75g)을 가한 후 12시간, 1일, 4일, 7일, 14일, 28일째에 각각 3마리씩 희생시켜, 시간에 따른 제1형 교원질의 발현과 조직학적 변화를 면역조직화학적 및 조직 병리학적으로 관찰한 바 다음과 같은 결과를 얻었다. 견인력을 가한 후 28일째까지, 견인측의 치주인대 섬유는 신장되어 있었고, 압박측의 치주인대 섬유는 압축되어 있었으며 치주인대 섬유의 배열은 완전히 회복되지 않았다. 대조군에서의 제1형 교원질 발현은 구강 상피, 전상아질, 치수와 치주인대에서 경미하였으나, 치조골에 연한 조골세포, 치근단의 무세포성 백악질, 조백악세포와 악간봉합 부위에서 약양성의 발현을 보였다. 실험군에서의 제1형 교원질의 발현은, 무세포성 백악질에서 치아 이동 1일째에 중등도, 7일째부터 강양성의 발현을 보였으며, 정중 구개 봉합 부위에서는 치아 이동 1일째에 중등도, 14일째부터 강양성 발현을 보였다. 치주인대에서는 치아 이동 4일째에서 견인측이 압박측보다 제1형 교원질의 발현이 많아져 7일째에서 최고조에 달하다가 14일째부터는 측간의 차이가 없었다. 골조직에서는 조골세포가 붙어 있는 골 주변부에서 강하게 반응을 보여 대조군과 구별되었으며 특히 7일째 이후에 많은 것으로 관찰되어 골개조 현상과 관련하여 주목되었다. 이러한 관찰로 교정적 치아 이동 후 골재형성 과정은 조직 형성 세포의 분화와 이들 세포에서 형성되는 제1형 교원질과 밀접한 관계가 있음을 확인할 수 있었다. This study was designed to evaluate the expression of type I collagen in periodontal tissue during the experimental movement of rat incisors. Twenty-one Sprague-Dawley rats were divided into a control group(3 rats), and experimental groups(18 rats) where a force(75g) from helical springs across the maxillary incisors was applied. Experimental groups were sacrificed at 12 hours, 1, 4, 7, 14 and 28 days after force application, respectively. And tissue slides of control and experimental groups were studied histologically and immunohistochemically by LSAB(Labelled streptavidine Biotin) immunohistochemical staining for type I collagen. The results were as follows : 1. Until 28-day after force application, periodontal fibers were strectched on the tension side, and compressed in pressure side, and the arrangement of periodontal fibers was not recovered by that time. 2. The degree of type I collagen expression in control group was rare in the oral epithelium, predentin, pulp and periodontal ligament, but was mildly positive in osteoblasts, acellular cementum, cementoblasts, intermaxillary suture. 3. At acellular cementum of experimental group, the expression of type I collagen was moderate in 1-day and severe in 7-day, which was maintained until 28-day. 4, Type I collagen was observed in the newly formed fibrous connective tissue and osteoblasts at intermaxillary suture, moderately in 1-day, and severely in 14-day. 5. The tension side of periodontal ligament showed a more positive expression of type I collagen than the pressure side in 4-day. The degree was highest in 7-day and was not differentiated between sides in 14-day. 6. In the side wall of bone matrix on which osteoblasts were attached, type I collagen was expressed severely, especially in 7-day. From the above findings, we could suggest that bone remodeling in tooth movement be intimately related to the cell differentiation and the resulting formation of type I collagen.