식민지 시대 민족 지성 최현배의 사상과 국어 연구의 배경 - 민족주의적 낭만주의자로서의 사상을 중심으로 -

이재현 ( Jae Hyun Lee ) 한민족문화학회 2003 한민족문화연구 Vol.12 No.-

COVID-19가 건설프로젝트 리스크에 미치는 영향

이재현,이성현,이동훈,Lee, Jae-Hyun,Lee, Seong-Hyeon,Lee, Donghoon 한국건설안전학회 2021 한국건설안전학회 논문집 Vol.4 No.1

현재 유행하고 있는 COVID-19는 '세계보건기구' 설립 이래 가장 많은 사망자가 발생한 대유행이다. 수많은 건설 프로젝트에도 상당한 영향을 미칠 것으로 예상된다. COVID-19가 건설업계를 강타한 이후, 그들이 감당해야 할 위험은 매년 줄어들었다. 그러나 COVID-19의 장기화로 인해 대기 지연, 자재 공급, 경제적 손실의 위험이 증가했다. 정확한 대책은 파악이 필요할 것이며 현재 건설사업 중 리스크가 더 큰 비중으로 완화될 수 있어야 한다. 따라서 이번 연구는 COVID-19로 인해 국내 건설사에 건설사업에 영향을 미친 위험요소를 분석하고 규명하는 것을 목적으로 한다. 이전 건설 프로젝트의 리스크를 바탕으로 조사, 가중치 부여 등을 통해 리스크 사례 연구, COVID-19 관련 리스크 등을 추출한다. 각 위험 요소는 AHP 분석 기법을 기반으로 계산된다. 이에 따라 COVID-19로 인해 건설공사 리스크 연구 결과가 달라질 것으로 예상된다. 그것은 현재 상황과 이후의 전염병 상황에 대처하기 위해 제시될 것이다. COVID-19, which is currently in vogue, is a pandemic with the largest number of deaths since the establishment of the "World Health Organization". It is also expected to have a significant impact on countless construction projects. After COVID-19 hit the construction industry, the risk that they needed to cover, decreased every year. However, the prolonged COVID-19 increased the risks of air delays, material supply, and economic losses. The exact measurements will be needed to be identified and the risks of the current construction projects must have a mitigated risk with a greater proportion. Therefore, the purpose of this study is to analyze and identify the risks that have influenced construction projects to the domestic construction companies due to COVID-19. Based on the risks of the previous construction projects, risk case studies, and risks related to COVID-19, are extracted through surveys, weights. Each risk factor are calculated based on the AHP analysis technique. Thus, it is expected that the results of the risk research on construction projects will change due to COVID-19. It will be presented to cope with the current situation and later pandemic situations.

두툽상어 췌장에 출현하는 내분비세포의 면역조직화학적 연구

이재현,이남수,이형식,김종법,Lee, Jae-hyun,Lee, Nam-soo,Lee, Hyeung-sik,Kim, Jong-beom The Korean Society of Veterinary Science 1991 大韓獸醫學會誌 Vol.31 No.1

두툴상어의 췌장 내분비세포를 면역조직화학적으로 관찰하였던바, 5종의 면역반응세포들이 동정되었다. glucagon 면역반응세포는 도관의 상피간 및 췌장외분비선의 선포주위에서 한개 또는 다수의 집단으로 출현하였으며, insulin 면역반응세포는 islet의 주변부 또는 도관의 상피간에 각각 관찰되었다. somatostatin 면역반응세포는 도관의 상피간 또는 췌장외분비선의 주위에 한개 또는 집단으로 분포하였으며, 소수의 5-HT 연역반응세포는 islet의 주변부 및 췌장 외분비선의 선세포간에서 관찰되었다. BPP 면역반응세포는 극소수로 관찰되었으며, GAS/CCK외 chromogranin 면역반응세포들은 관찰되지 않았다. The pancreatic endocrine cells of the cat-shark, S. torazame, were studied using immunohistochemical method. Five kinds of endocrine cells (glucagon-, somatostatin-, insulin-, 5-HT-and BPP-immunoreactive cells) identified in this study. The chracteristic findings of the distributions of five immunoreactive cells were as follows. Glucagon-immunoreactive cells were detected as clustering group in the epithelia of the interlobular duct and singly the pancreatic acini, respectively. Insulin -immunoreactive cells were moderately observed in the epithelia of the interlobular duct or in the periphery of the islet. Somatostatin-immunoreactive cells were distributed in single or mass groups in the epithelia of the interlobular duct and the exocrine gland of the pancreas. A very few 5-HTimmunoreactive cells were seen in the periphery of the islet and the acini of the pancreas-BPP-immunoreactive cell was singly located in the periphery of the pancreatic islet, but GAS/CCK-and Chromogranin-immunoreactive cells were not found in this study.

고슴도치 위점막의 내분비세포에 관한 면역조직화학적 연구

이재현,이형식,이남수,김종범,Lee, Jae-hyun,Lee, Hyeung-sik,Lee, Nam-soo,Kim, Jong-beom 대한수의학회 1991 大韓獸醫學會誌 Vol.31 No.1

한국산 고슴도치의 위점막에 분포하는 내분비세포에 대해 면역조직화학적으로 관찰하였던바, gastrin, somatostatin, 5-HT, glucagon, BPP, motilin, GIP 등 7종의 면역반응세포들이 동정되었으며, 이들 세포들의 부위별 분포와 출현빈도의 특정은 다음과 같다. Gastrin 면역반웅세포는 유문부에서만 아주 다수로 출현하였으며, somatostatin 면역반응세포는 유문부에서 다수, 분문부와 위저부에서는 중등도의 출현올 볼 수 있었다. 5-HT 면역반응세포는 분문부와 유문부에서 다수, 위저부에서는 중등도로 출현하였다. glucagon 면역반응세포는 위저부에서 소수로 그리고 유문부에서 극히 소수로 출현하였고, BPP 면역반응세포는 유문부에 다수로, 위저부에 중등도로 분문부에 소수로 분포하였다. motilin 면역반응세포는 유문부와 위저부에서 소수 또는 극소수로 출현하였으며, GIP 면역반응세포는 유문부에서만 소수의 분포를 볼 수 있었다. The gastric endocrine cells of the Korean hedgehog, Erinaceus korean us were studied immunohistochemically. Seven kinds of endocrine cells-, gastrin-, somatostatin-, 5-HT-, glucagon-, BPP-, motiIin-and GIP-immunoreactive cells- were identified in this study. The chracteristic findings of the regional distribution and relative frequency of them were examined. Gastrin-immunoreactive cells were very numerously detected only in the pyloric region. Somatostatin-immunoreactive cells were more numerous in the pyloric region than in the cardiac and fundic regions. 5-HT-immunoreactive cells were more numerous in the cardiac and pyloric regions than in the tundic one. Glucagon-immunoreactive cells were found few or rarely in the fundic and pyloric regions. BPP-imunoreactive cells were numerously distributed in the pyloric region, moderately in the fundic region and few in the cardiac region. Motilin-immunoreactive cells were found rarely or few in the fundic and pyloric regions. GIP-immnuoreactive Cells were detected onIy in the pyloric region.

과도한 마모를 보이는 환자에서, 임플란트를 활용해 수직 고경을 증가시키며 shortened dental arch 개념을 적용한 보철 수복 증례

이재현,김태수,이철원,이원섭,이수영,Lee, Jae Hyun,Kim, Tae Su,Lee, Chul Won,Lee, Won Sup,Lee, Su Young 대한치과보철학회 2016 대한치과보철학회지 Vol.54 No.1

과도한 마모 같은 잔존 치아 구조의 파괴는 전치유도와 저작 기능에 심각한 손상을 초래할 수 있다. 이런 증상을 개선시키기 위해서는 상실된 구치부를 수복하여 적절한 교합을 회복시켜주는 것이 필수적이다. 구치부의 무치악부를 수복하기 위해서는 의치나 임플란트가 사용될 수 있는데, 임플란트로 수복시에는 경제적인 제약으로 위해 shortened dental arch 개념을 적용하는 것이 유리할 수 있다. 본 증례는 86세 남환으로, 다수의 치아가 상실되어 있었고, 구치부 교합의 붕괴와 과도한 치질 소실, 수직 피개를 관찰할 수 있었다. 구치부에서 붕괴된 교합을 재형성해주는 것을 최우선 과제로 정하였으며, 가철성 보철물 대신, 국민건강보험이 적용된 2개의 임플란트와 고정성 국소의치, 레진을 이용하여 보철 수복을 완료하였다. 소구치 부위에서 2 mm의 수직고경을 거상하였으며, shortened dental arch 개념을 적용하였다. 이를 통해 전악 수복에 비하여 적은 비용으로 이를 대체하는 치료를 고정성 보철물로 할 수 있었으며, 심미적, 기능적으로 양호한 결과를 얻었다. Excessive occlusal wear can result in unacceptable damage to the residual teeth structure, anterior guidance and masticatory function. An 86-year-old man presented with worn dentition and anterior deep bite due to loss of the posterior support. Two implants covered by Korean national health insurance, fixed partial denture and direct composite resin were used to restore the dentition, instead of removable prosthesis. The occlusal vertical dimension was increased by 2 mm in the premolar area and shortened dental arch concept was applied. This treatment was a less expensive alternative to full-mouth rehabilitation with positive esthetic and functional outcomes after 7 months of follow-up.

한국산 고슴도치 분문부와 위저부의 내분비세포에 관한 전자현미경적 연구

이재현,이형식,이남수,김종범,Lee, Jae-hyun,Lee, Hyeung-sik,Lee, Nam-soo,Kim, Jong-beom The Korean Society of Veterinary Science 1990 大韓獸醫學會誌 Vol.30 No.4

한국산 고슴도치의 분문부와 위저부에 있어서 내분비세포를 전자현미경적으로 관찰하였던 바 EC, ECL, $D_1$, G 및 A-1ike 세포 등 5종의 세포가 동정되었다. EC 세포는 높은 전자밀도의 다형태성 과립을 가지며, 과립내에는 더 높은 천자밀도의 dense body가 보였고, 과립의 크기는 170~500nm였다. ECL 세포는 원형 또는 난원형의 과립을 가지며, 과립 내용물은 전자밀도가 높고 편재하거나 공포상으로 출현하였고, 과립의 크기는 220~450nm였다. $D_1$ 세포는 원형의 과립을 가지며, 과립의 전자밀도는 낮거나 중등도였고, 과립의 크기는 140~400nm였다. G 세포는 원형 또는 난원형의 과립을 가지며, 중등도의 전자밀도를 나다내는 과립은 내용물과 한계막 사이에 좁은 halo를 보였고, 과립의 크기는 200~400nm였다. A-like 세포는 원형의 과립을 가지며, 이들 과립은 높은 전자밀도를 나타내었고, 내용물과 한계막은 밀착하였으며, 과립의 크기는 170~260nm였다. Endocrine cells in the cardiac and fundic regions of the Korean hedgehog were studied ultrastructurally. Five types of endocrine cells classified as EC, ECL, $D_1$. G and A-like cells were identified in these regions. EC cells contained pleomorphic granules, 170~500nm in diameter, with high electron density and highly dense bodies in a dense matrix. ECL cells were characterized by the presence of round or oval granules, 220~450nm in diameter, with high electron density. Some granules of ECL cells showed a small amounts of contents or empty. $D_1$ cells contained round and relatively small granules, 140~400nm in diameter, with low to moderate electron density. G cells were characterized by the presence of round or oval granules, 200~400nm in diameter, with moderate electron density. Some granules of these cells showed a narrow halo between the limiting membrane and the granular matrix. A-like cells contained round granules, 170~260nm in diameter, With high electron density. The granules of these cells showed homogeneous matrix surrounded by the tight membrane.

랫트에서 Clonorchis sinensis 감염이 간 oval cell 의 증식에 미치는 영향

이재현,윤병일,박민경,김신나,이준상,주경환,김한종,Lee, Jae-Hyun,Yoon, Byung-Il,Park, Min-Kyung,Kim, Shin-A,Lee, Joon-Sang,Joo, Kyoung-Hwan,Kim, Han-Jong 한국수의병리학회 1998 한국수의병리학회지 Vol.2 No.2

The prevalence of primary liver carcinoma (PLC) is relatively high in Clonorchis sinensis (CS) endemic areas in Korea. PLC is a malignant tumor which can be subclassified into hepatocellular carcinoma and cholangiocarcinoma(CC). CC has been associated with clonorchiasis, but it is unclear whether clonorchiasis is associated with hepatocarcinogenesis. This experiment was designed to investigate relationships between clonorchiasis and early changes of hepatocarcinogenesis. Sixteen Sprague-Dawley rats weighing 150g were divided into two groups of 8 rats in each. All rats were fed choline-devoid(CD) diet for 4 weeks. Group 1 was given 0.015-0.020% diethylnitrosamine(DEN) as drinking water for 1 week. After one week, the rats were treated orally with 1% N-acetylaminofluorene(AAF) (5 times per week for 2 weeks). Group 2 was treated equally to group 1 except for CS infection during AAF treatment. Two rats in each group were sacrificed at 4th, 5th, 6th and 7th week of the experiment. Livers were stained with OV -6, proliferating cell nuclear antigen(PCNA) and GST-p. Results were as follows: Group 2 livers showed more oval cell proliferation in parenchyma and portal areas at the 4th, 5th, 6th and 7th weeks than did livers of group 1 (p<0.01). PCNA was mostly localized in oval cell populations, rather than hepatocytes and biliary cells. The ratio of oval cells to hepatocytes was much higher in group 2 than in group l(p<0.01 The ratio of hepatocytes to biliary cells is higher in group 2 than in group 1 (p<0.05), More group 2 acidophilic foci reacted to GST-p monoclonal antibody than in the noninfected group. It appeared that CS infection promoted potentially precancerous acidophilic foci and oval cell proliferation.

Immunohistochemical study of the gastrointestinal endocrine cells in the Mongolian Gerbils, Meriones unguiculatus

이재현,이형식,구세광,박기대,김길수,Lee, Jae-hyun,Lee, Hyeung-sik,Ku, Sae-kwang,Park, Ki-dae,Kim, Kil-soo The Korean Society of Veterinary Science 2000 大韓獸醫學會誌 Vol.40 No.4

몽골리안 저빌(Meriones unguiculatus)의 위장관을 분문부, 기저부, 유문부, 십이지장, 공장, 회장, 맹장, 결장 및 직장의 9부분으로 구분하고 이들 부위에서 cholecystokinin(CCK)-8, gastrin, secretin, pancreatic polypeptide(PP), somatostatin, serotonin, glucagon 및 insulin 등 8종의 항혈청에 대한 내분비 세포의 부위별 분포 및 출현빈도를 면역조직화화적으로 관찰하였던 바, CCK-8, gastrin, somatostatin 및 serotonin 면역반응세포들이 관찰되었다. 이들 면역반응세포들은 위 부위에서는 원형에서 타원형으로 주로 위샘(gastric gland) 또는 주세포와 벽세포 사이에서 관찰되었고, 장 부위에서는 원형 또는 타원형의 면역반응세포들이 공장의 장샘(intestinal gland)에서 관찰되었으며, 타원형에서 방추형의 세포들이 장상피세포 사이에서 관찰되었다. CCK-8 면역반응세포들은 유문부와 십이지장에 국한되어 다수 또는 소수 관찰되었으며, gastrin 면역반응세포들은 유문부에 국한되어 다수 관찰되었다. Somatostatin 면역반응세포들 역시 gastrin 변역반응세포들과 유사하게 유문부에 국한되어 중등도의 출현빈도를 나타내었고, serotonin 면역반응세포들은 분문부와 맹장을 제외한 위장관 전부위에 걸쳐 중등도 또는 다수 관찰되었으나, secretin, PP, glucagon 및 insulin 면역반응세포들은 관찰되지 않았다. 이상에서 몽골리안 저빌의 위장관에 존재하는 내분비 세포들의 종류 및 출현빈도는 다른 설치류에 비해 매우 적거나 낮은 것으로 관찰되었으며, 이들 내분비 세포들의 출현부위 역시 다른 설치류에서와는 달리 일부 부분에 국한되는 것으로 관찰되었다. In order to study the regional distribution and relative frequency of the immunoreactive endocrine cells in the gastrointestinal tract of the Mongolian gerbil, Meriones unguiculatus, the gastrointestinal tract was divided into 9 portions (cardia, fundus, pylorus, duodenum, jejunum, ileum, cecum, colon and rectum) and immunostained by immunohistochemical (PAP) method using 8 types of specific antisera against cholecystokinin (CCK)-8, gastrin, secretin, pancreatic polypeptide(PP), somatostatin, serotonin, glucagon and insulin. CCK-8-, gastrin-, somatostatin- and serotonin-immunoreactive cells were demonstrated in this study. These immunoreactive cells were found in the gastric gland regions of the pylorus or between parietal and chief cells of the fundus with round to spherical shaped, and in the interepithelial regions of the intestinal tract with spherical to spindle shaped except for jejunum where some of immunoreactive cells were also observed in the intestinal glands with round to spherical shaped. CCK-8-immunoreactive cells were restricted to the pylorus and duodenum with numerous and a few frequency, respectively. Gastrin-immunoreactive cells were restricted to the pylorus with numerous frequency. Similar to those of gastrin-immunoreactive cells, somatostatin-immunoreactive cells were restricted to pylorus with moderate frequency. Serotonin-immunoreactive cells were detected throughout whole gastrointestinal tract except for cardia and cecum with moderate or numerous frequency. However, no secretin-, PP-, glucagon- and insulin-immunoreactive cells were observed in this study. From these results, the appearance type, regional distribution and relative frequency of immunoreactive endocrine cells in the gastrointestinal tract of the Mongolian gerbils were somewhat lowered or restricted compared to those of other mammals and these differences were might be caused by feeding habits and species specification.

기러기 췌장 내분비세포에 대한 면역조직화학적 연구

이재현,구세광,이형식,Lee, Jae-hyun,Ku, Sae-kwang,Lee, Hyeung-sik 대한수의학회 1999 大韓獸醫學會誌 Vol.39 No.3

The regional distribution and relative frequency of the endocrine cells in the pancreas of the bean goose were investigated by immunohistochemical methods using 6 types of the specific antisera. Spindle shaped serotonin-immunoreactive cells were detected in the exocrine portions. Spherical or spindle shaped glucagon-immunoreactive cells were observed in the exocrine and dark and mammalian type islets. In the dark type islets, numerous cells were dispersed throughout whole islets but they were located in the peripheral regions of the mammalian type islets. No glucagon-immunoreactive cells were detected in light type islets. Round or spherical shaped insulin-immunoreactive cells were observed in the exocrine and dark, light and mammalian type islets. They were observed in the exocrine regions with a few numbers. Extremely rare cells were detected in central portion of the dark type islets but moderate to numerous cells were found in the central regions of the mammalian and light type islets, respectively. Spherical or spindle shaped somatostatin-immunoreactive cells were observed in the exocrine and dark, light and mammalian type islets. A few single cells were detected in the exocrine portions. In the dark type islets, numerous cells were dispersed throughout whole islets but a few to moderate numbers of cells were located in the peripheral regions of the light and mammalian type islets. Moderate numbers of the bovine pancreatic polypeptide-immunoreactive cells were found in the exocrine portions with round, spherical or spindle shape. But no bovine Sp-1/chromogranin-immunoreactive cells were observed in this study.

연령에 따른 청둥오리 장관 내분비세포에 대한 면역조직화학적 연구

이재현,구세광,이형식,Lee, Jae-hyun,Ku, Sae-kwang,Lee, Hyeung-sik 대한수의학회 1998 大韓獸醫學會誌 Vol.38 No.1

The relative frequency and distribution of bovine chromogranin(BCG)-, serotonin-, somatostatin(SOM)- and S-100 protein-immunoreactive cells in the intestinal tract of the duck (Anas platyrhynchos platyrhyncos, Linne) with ages were studied using immunohistochemical methods. BCG-immunoreactive cells were detected in duodenum on 23 days of incubation. Thereafter these cells were occurred throughout the intestine. SOM-immunoreactive cells were detected in the small intestine from hatching to 9 weeks. Thereafter they were also observed in colon. Serotonin-immunoreactive cells were detected throughout the intestinal tracts after hatching. These immunoreactive cells were increased with ages except that BCG-immunoreactive cells were decreased with ages from 6 weeks after hatching. BCG- and serotonin-immunoreactive cells were most frequently detected in colon regions and SOM-immunoreactive cells in duodenum regions, but no S-100 protein-immunoreactive cells were detected in this study.