중수 회수 시스템에서 운전 경험

안현경,이인형 순천향대학교 부설 산업기술연구소 2005 순천향 산업기술연구소논문집 Vol.11 No.2

The moisture inside the coolant and moderator system areas of Candu-type nuclear power plant is recycled to prevent the value deuterium to being lost and the harm of tritium form being spread to the natural environment. The deuterium is separated from the moisture by the successive processes such as adsorption and desorption on molecular sieve, cooling with water purification with activated carbon filer, ion exchange, and evaporation in the deuterium recovery system that consists of dryers, storage tank. filter, three ion exchange bed, evaporators, and upgrader. The water collected in the dryers in transformed from the kinds of moisture generated inside the primary system of nuclear plant and supplied with the fresh air. In addition, hydrazine can be included in the moisture such that the water might be alkaline. Unexpectedly, the solution in the storage tank followed from dryers is acidic and the deuterium water collected in the upgrader is also acidic in Wolsung nuclear unit 1. The concentration of chloride is about 500 ppm and pH is 3.8 in the storage tanks of dryers, while the white precipitation of aluminum and silica oxides exist to some degree before filter and to fair extent after ion exchange bed. Hydrazine and its derivative, ammonia are not high(less than 1ppm). Concentration of chloride was source of salt include in the fresh air. The sources of aluminum and silica oxides were products thermally decomposed from molecular sieve. The impurities decrease the removal efficiency of filtration and ion exchange and shorten sieve. The impurities decrease the removal efficiency of filtration and ion exchange and shorten the operation lifetimes of their facilities. In this case the chloride can be transferred to the upgrager in which the packing material, copper might be corroded. Therefore the fresh air should be treated completely to remove the salt. The capacity of the activated carbon filter in the purification system might be increased.

안구적출에 따른 위둔덕의 칼슘결합단백질의 재구축 및 상호 연관성

안병수,고길석,안명수,김경주,권안성,정명섭,박춘매,조병옥,김진우,Samudra Acharya,Parmeshwar Narayan Amatya,장인엽 朝鮮大學校 附設 醫學硏究所 2007 The Medical Journal of Chosun University Vol.32 No.1

Background: Superior colliculus is a part of midbrain, and participates in the visual reflexes, It receives afferent fibers from optic nerve, visual cortex, and spinotectal tract. After optic deprivation, the microscopic structure of the superior colliculus changed. Calcium-binding proteins (CBPs) Play an important role in the neuronal protection, differentiation and reorganization of the central nervous system, Objectives and Methods: The effects of neonatal retinal deafferentation on a CBPs, calbindm D-28k (CB), Parvalbumin (PB) and calretimn (CR), and the existence of colocalization between the CBPs were examined immunohistochemically in the rat superior colliculus. Results: On the experimental (contralateral to enucleation) side of superior colliculus, the number of CB-immunoreactive (IR) cells was reduced (77.4% compared to control), but not fibers. The number of PB-IR neurons and fibers was also reduced on the experimental side (88.5% compared to control), In the other hand, the CR-IR cells were dramatically increased (642% compared to control), but CR-IR fibers were markedly decreased on the experimental side. The colocalization between CB-CR and PV-CR was rarely observed in the superior colliculus Conclusion: These results suggest that the changes of retinotectal projection may alter the expressional pattern of CBPs in different manners; relatively stable in CB- and PV-IR neurons and plastic in CR-IR neurons.

생쥐 위장관의 Interstitial cells of Cajal(ICC)에 대한 면역조직화학적 연구

김영철,차경훈,신무경,임건한,김주영,안병수,김장만,양경철,박도영,오재욱,장인엽 조선대학교 2003 The Medical Journal of Chosun University Vol.28 No.1

Background and Objectives : Interstitial cells of Cajal(ICC) are the pacemakers in gastrointestinal tract that modulates gastrointestinal motiliey and these cells also transmit neural input from enteric nerves to smooth muscles. Recent work on tissues from patients with motility disorders that suggest that loss or defect in ICC could be related to pathophysiology in human and animal models. Immunolabelling of ICC in intestinal wall is recently developed by using specific marker, anti-c-kit antibody. Immunohistochemistry was done for ICC network in attempt to provide a morphological basis for the mechanism regulating gastrointestinal motility Methods : Cryosection was done, and whole-mount preparations of mouse stomach, gastrointestinal tract were immunolabelled using the anti-c-Kit. Immunolabelled ICC networks were observed under a confocal laser scanning microscopy. Results : According to three dimensional reconstruction study, we found that the c-Kit-positive celluar networks were widely distributed in the gastrointestinal muscle (1) circular muscle layer(IC-IM), (2) myenteric plexus(IC-MY), (3) deep muscular plexus(IC-DMP) in ileum, (4) submucosal plexus(IC-SMP) and longitudinal muscle layer(IC-LM) in colon. Conclusion : The characteristic profiles of ICC celluar networks provide a morphological basis upon the mechanism regulating gastrointestinal motility. Additional studies for the enteric nerves-ICC interaction are need to evaluate the detailed roles of Icc in gastrointestinal tract.

The effect of alpha lipoic acid in a porcine in-stent restenosis model

Lim, Sang Yup,Bae, Eun Hui,Jeong, Myung Ho,Kim, Ju Han,Hong, Young Joon,Sim, Doo Sun,Kim, Yong Sook,Park, In Kyu,Ahn, Youngkeun,Song, Sun-Jung,Cho, Dong Lyun,Kim, Kyoung Seok,Kang, Jung Chaee Elsevier 2009 Journal of cardiology Vol.54 No.3

<P><B>Summary</B></P><P><B>Background</B></P><P>The aim of this study was to investigate the effect of alpha lipoic acid (α-LA) on a porcine in-stent restenosis (ISR) model.</P><P><B>Methods</B></P><P>In protocol 1, porcine vascular smooth muscle cells (PVSMC) were stimulated by granulocyte-colony stimulating factor (G-CSF) in the presence or absence of α-LA. MTT (3-[4,5-dimethylthiazole-2-yl] 2,5-diphenyl tetrazolium bromide) assay and western blotting were used to determine the cell growth inhibitory rate and anti-inflammatory effect associated with nuclear factor-κb (NF-κb) and extracellular signal-regulated kinase (ERK). In protocol 2, 28 days after balloon overdilation injuries, 24 bare metal stents were placed in coronary artery of 12 pigs. The pigs were randomly divided to receive control diet with or without α-LA (100mg/kg). In protocol 3, 8 control stents and 8 α-LA coated stents were randomly implanted in 2 coronary arteries of 8 pigs and follow-up coronary angiogram and histopathologic assessment were performed 4 weeks after stenting.</P><P><B>Results</B></P><P>Protocol 1. The proliferation of PVSMC was inhibited and protein expression of NF-κb and ERK were attenuated by α-LA pretreatment. Protocol 2<I>.</I> On histopathologic analysis, the neointimal area (4.0±1.0mm<SUP>2</SUP> vs. 1.5±0.7mm<SUP>2</SUP>, <I>p</I><0.001) and histopathologic area of stenosis (66.7±10.7% vs. 24.2±9.7%, <I>p</I><0.001) were reduced in the α-LA feeding group compared to controls. Protocol 3. On histopathologic analysis, the neointimal area (3.9±0.8mm<SUP>2</SUP> vs. 1.0±0.4mm<SUP>2</SUP>, <I>p</I><0.001), and the histopathologic area of stenosis (67.1±8.8% vs. 17.4±10.0%, <I>p</I><0.001) were reduced in the α-LA coated stent group compared to the control stent group.</P><P><B>Conclusions</B></P><P>α-LA feeding and α-LA coated stents inhibit neointimal hyperplasia in porcine ISR, possibly through inhibiting the activation of NF-κb pathway and proliferation of PVSMC.</P>

논문 : 원지반 부착식 판넬옹벽의 현장 적용성 평가

민경남 ( Kyoung Nam Min ),이재원 ( Jae Won Lee ),이중관 ( Jung Gwan Lee ),강인규 ( In Kyu Kang ),안태봉 ( Tae Bong Ahn ) 대한지질공학회 2016 지질공학 Vol.26 No.1

최근 들어 도심지 재개발과 산업단지 조성 등이 활발하게 진행되면서 깎기 비탈면의 효율적 활용과 민원방지 그리고 환경훼손을 최소화할 수 있는 공법의 필요성이 점차 커지고 있다. 판넬식 옹벽은 지보재 보강을 통해 원지반의 전단강도를 증가시키고 전면판인 프리캐스트 판넬과 지보재를 체결하여 개별적 벽체를 형성시킴으로써 수평토압에 저항하는 공법이다. 프리캐스트판넬의 적용으로 기존 옹벽에서 발생하던 콘크리트 현장타설에 의한 공기지연과 콘크리트 품질저하 등의 문제는 다소 해결되었지만 비탈면 과다절취에 의한 사토처리 및 토취장 확보, 및 옹벽 전면 콘크리트 노출로 인한 경관성 저하문제는 여전히 미결과제로 남아있는 실정이다. 본 연구에서는 기존 판넬식옹벽의 단점을 보완하기 위하여 판넬 전면을 자연암반형으로 연출하고 수직의 원지반에도 부착이 가능하도록 공정을 개선하였으며 실내 및 현장시험을 통하여 개발된 옹벽의 현장 적용성 평가를 수행하였다. 판넬에 대한 실내시험을 수행하여 자연암반형 판넬의 자체강도 및 거동특성에 대한 검증을 수행하였으며 현장 시험시공을 통하여 수직절취 및 원지반 부착에 대한 현장 적용성을 평가하였다. 또한 시험시공 시 보강재 및 비탈면에 대한 계측을 수행하였으며 이를 3차원 수치해석 결과와 비교·분석하였다. 실내시험 결과 사보강에 의한 판넬의 펀칭강도 증가를 확인하였으며 현장 시험시공을 통하여 원지반 부착식 옹벽의 시공성 및 현장 적용성을 확인하였다. 또한, 장기계측 및 수치해석적검증을 통하여 원지반 부착식 옹벽 시스템이 시공중 및 장기적으로 안정성이 확보됨을 확인하였다. New building methods are needed to aid increased inner-city redevelopment and industrial construction. A particular area of improvement is the efficient use of cut slopes, with the minimization of associated problems. A retaining wall of precast panels can resist the horizontal earth pressure by increasing the shear strength of the ground and reinforcing it through contact with the panels. Precast panels allow quick construction and avoid the problem of concrete deterioration. Other problems to be solved include the digging of borrow pits, the disposal of material cut from the slope, and degradation of the landscape caused by the exposed concrete retaining wall.This study suggest the methods of improvement of an existing precast panel wall system by changing the appearance of the panels to that of natural rock and improving the process of adhering the panel to a vertical slope. The panels were tested in the laboratory and in the field. The laboratory test verified their specific strength and behavior, and the field test assessed the panels`` ground adherence at a vertical cutting. Reinforcement of the cutting slope was also measured and compared with the results of 3D numerical analysis. The results of laboratory test, identified that the shear bar increase the punching resistance of panel. And as a results of test construction, identified the construct ability and field applicability of the panel wall system adhered to in-situ ground. In addition to that, extended measurement and numerical analysis, identified the long-term stability of panel wall system adhered to in-situ ground.

조구등(釣鉤藤)의 4-VO로 유발한 흰쥐뇌허혈에 대한 신경방어효과

李仁煥,林康鉉,李鍾錫,石庚浩,安德均,朴虎君,김頀哲 대한본초학회 1999 大韓本草學會誌 Vol.14 No.2

Uncariae Ramulus et Uncus(UR, ???) has sweet in flavour and slightly cold in property, acting on the liver and pericardium channels. This drug was described in a medical classic as having the ability to remove "heat", check hyperfunction of the liver and relieve dizziness, tremors, and convulsion, and subdue "endogenous wind". So this study was planned to check the neuroprotective effect of UR on the global ischemia induced by 4-vessel occlusion in Wistar rats. and UR extract was lyophilized after extraction with 70% methanol. We induced 4-vessel occlusion for 10 minutes and reperfused again. The number of CA1 pyramidal neurons were counted after 7 days of reperfusion under the cresyl violet staining. In 4-VO ischemia model, UR showed significantly neuroprotective effects(1,000 and 500 ㎎/㎏ of UR extracts, p<0.05) compared with control group. Each neuroprotective ratio was about 23.0%, 19.0% respectively. Consequently, Uncariae Ramulus et Uncus has neuroprotective effects on the global ischermia induced by 4-vessel occlusion in Wistar rats. So we expect that Uncariae Ramulus et Uncus can be used as a drug for neurodegenerative disease.

벼 잡종초기세대에서 이삭줄기 대유관속 수와 이삭 특성의 분리양상

김광호,안종국,서경인 建國大學校附設農業資源開發硏究所 2001 農資源開發論集 Vol.23 No.-

The segregation modes and the selection efficiency of large vascular bundle(LBV) number and panicle characteristics were measured in three hybrid populations of rice. F_1 plants of the three crosses showed different direction and degree of dominance in vascular bundle number and panicle characteristics. The panicle neck diameter(ND), number of primary branches(PB) and LVB showed a typical normal distribution in F_2. When F_2 plants were divided into two groups up culm length of 90cm, the distribution of LVB number and panicle characteristics were not different between two populations. The selected and non-selected F_3 populations showed no difference in distribution of LVB number and panicle characteristics. However, F_3 populations grouped by culm length of 90cm showed different distributions in LVB and 100-grain weight among six characteristics observed. In F_2 populations, ND showed positive correlationship with PB, LVB number and grain number per panicle(GN). ND was positively correlated with PB, LVB number, GN and panicle length in selected and non-selected F_3 populations.

식이를 통한 농약섭취량에 관한 연구 : 두류, 서류, 견과류, 종실류, 채소류, 과실류 및 그 가공품에 대하여 legumes,potatoes,nuts,seeds,vegetables,fruits and their products

원경풍,홍무기,최동미,오창환,박건상,최윤주,안장혁,황인균,정지윤,정선미,박일경,이정복,장선영,홍주연,최영내 식품의약품안전청 1998 식품의약품안전청 연보 Vol.2 No.-

우리가 섭취하는 식품을 수세 , 탈피, 가열 등으로 섭취직전의 상태로 조리하여 잔류농약을 분석하였다. 그 결과 식품 섭처를 통한 농약의 1일 춘정 섭취량(EDI : estimated daily intake)을 파악하고 이를 농약의 1일섭취허용량(ADI : acceptabte daily intake) 및 이론적 최대섭취량(TffDt : theoretical maxiraum daily in늘he)과 비교하여 우리나라 국민이 식품으로부터 섭취하는 농약의 양에 대한 안전성을 평71하였다. 보편성있는 식품수거를 위채 수거대상 지역은 인구가 밀집되어 있는 대도시인 서울, 부산, 대구』 인천 , 대전, 광주, 수원, 전주, 마산과 춘천의 10곳을 선정하였다. 대상식품으로는 두류 및 가공품 11종, 서류 및 가공품 3종.견과류 및 가공품 8종, 기호식물류 1종, 종실류 2총, 과실류 및 가공품 20종, 채소류 21종의 총 50종of었다. 분석대상농약은 동시다셩분 분석채 가능한 농약으로 HPD대상농약 11종 및 ECD대상농약 48종으로 총 59졸이었다. 1995년부터 5개년 계획으로 수행되어 온 본 딴구는 큼년이 4차년도였으며,종전보다 대상식품 및 대상농약을 크게 늘리고 시료 전처리에 있어석 자동화된 고상추출 정제법을 사용하여 시료 처리속도를 창상시켰다. 분쇄된 시료들은 acetonitrile로 추출한 후 정제하여 GC/BCD 및 GC/HPD로 분석하고 검출된 성분들은 GC/MSD로 재확인차였다. 분석 결과 총 660 식품중 9식품(딸기, 복숭아, 풋고추, 고춧가루, 파, 피망, 상추, 시금치 , 깻잎 )에서 4종의 농약(procymidone, EPN, endosulfan, chlorpyrifos)이 검출피었으며, 이들 식품 십취를 통한 농약의 추정 섭취량()801)은 0.01 ~ 1.28rg/person/day 수준으로 극히 미팡이었다. 대상농약중에서 가장 많이 섭취되고 있는 농약은 on(losulfan으로 그 EDI를 ADI와 ㅂ1교한 결과 0.39%에 불과 하였으며, 이론적 최대섭취량(TMDI)과 비교한 결과도 0.49% 수준으로 나타났다. 따라서 본 연구의 대상식품을 섭치할 경우 분석대상 농약으로 인한 안전성에는 문제가 얼는 것으로 려가되었다. In order to rstimate the intake of pesticide residues through foods which is prepared ready to eat, total diet study(TDS) was carried. The foods(legumes, potatees, nuts, seeds, fruits, vegeta-bles a8d their products) were purchased at the retail stores in 10 large cities of Korea, respectively. Thecollected 660 samples(66 foods x10 regions) were pr,etreated in a manBer similar to that used at home(washing, trimming, peeling. boiling and etc ) and followed Uy the automated solid phase extraction.Frem the extracted samples, total 59 pesticides were determined by capillary gas chromatography withECD, NPD and MSD. The levels of pesticide residues were resulted in not detected or orders of magni-tude lower than maximum residve limits for most of samples. However, in 9 samples(strawberrf, peach,green pepper, red pepper powder, scallion, bell pepper, lettuce korean, spinach, wild sesame leaf),4 pesti-cides(procymidone, chlorpyrifos, endosulfan, EPN) were detected with the estimated daily intake(EDE)values of fftl ~l.28rg/person/day. These EBI values were corresponded to <0.01 ~ 1.82% of ADT(for55kg person) and <0.01 ~O.49% of TMDI.

선택적 LPE방법에 의한 GaAs가판 상의 InP이종접합 박막의 성장

이병택,안주헌,김동근,안병찬,남산,조경익,박인식,장성주,Lee, Byung-Teak,An, Ju-Heon,Kim, Dong-Keun,Ahn, Byung-Chan,Nahm, Sahn,Cho, Kyoung-Ik,Park, In-Shik,Jang, Seong-Joo 한국재료학회 1994 한국재료학회지 Vol.4 No.6

Heteroepitaxial InP/GaAs layers were grown using the selective liquid phase epitaxy (SLPE) technique. It was observed that the optimum LPE conditions were $660^{\circ}C$ growth temperature, $5^{\circ}C$ supercooling, and $0.4^{\circ}C$/min cooling rate. Maximum expitaxial layer overgrowth (ELO) of 110-160$\mu \textrm{m}$ was obtained when the seed was aligned along (112) orientation. Initial melt-back of the substrate was observed but limited to the seed region so that flat In-Ga-As-P layers were grpwn throughout the GaAs substrates. The InP/GaAs heteroepitaxial structure could be obtained by growing an additional InP layer on top of the In-Ga-As-P layer. 선택적 LPE방법을 이용하여 (111)B GaAs 기판 상에 InP연속 박막을 성장하고 그 특성을 평가하였다. 적정 LPE성장조건으로 성장온도 $660^{\circ}C$, 과냉도 $5^{\circ}C$, 냉각속도 $0.4^{\circ}C$/min였으며, 연구된 온도 범위에서 성장온도가 증가할수록 표면형상이 개선되었고 ELO의 넓이가 증가하였다. Seed방향이 <112>방향에서 110-160$\mu \textrm{m}$ 정도의 최대 ELO 넓이가 얻어졌으며 60-80$\mu \textrm{m}$정도의 마스크 간격에서 연속박막을 용이하게 성장할 수 있었다. LPE 성장초기에 기판 용해 현상이 발생하였으며 이에 따라 성장박막의 조성이 대략 $In_{0.85}Ga_{0.15}$As$_{0.01}P{0.99}$으로 변화하고 InP/GaAs계면 및 박막 표면형상이 거칠어졌으나 기판의 성장 부위가 제한됨에 따라 통상적인 LPE박막에 비교하여 매우 개선된 표면형상을 얻을 수 있었다. 두개의 성장융액을 이용하여 1차 박막성장 후 다시 InP 박막을 성장하는 2단성장 방법을 사용하여 순수한 InP/GaAs박막을 성장할 수 있었으며 단면 TEM분석 결과 SLPE성장박막으로 전파하는 활주전위는 산화막 마스크에 의해 효과적으로 차단됨을 알 수 있었다.

심혈관계 질환으로 관상질환 집중치료실에 입원한 환자들의 혜후 측정을 위한 APACHEⅢ점수 체계의 임상적 유용성

이공섭,이창선,최현주,홍종서,강지향,김도형,이민영,오인균,김병엽,김상억,김학찬,한승혜,이재용,지영우,안경주 대한순환기학회 2000 Korean Circulation Journal Vol.30 No.8