SrTiO₃첨가에 따른 (x)BaTiO₃-(1-x)SrTiO₃의 유전적, 전기적 특성

정해덕,장동환,김덕근,홍경진,최창주 木浦大學校 工業技術硏究所 1998 工業技術硏究誌 Vol.8 No.-

In this paper, a ferroelectric material BaTiO3 was added to SrTiO3, then (x)BaTiO3-(1-x)SrTiO3(0.7≤x≤1) ceramics were fabricated with stable electrical properties in high voltage. Microstructures and electrical properties were investigated according to mixing conditions of addition material SrTiO3. As a result of the investigation of all experiments, the shrinkage was excellent in 0.9BaTioO3-0.1SrTiO3. The grain size was increased, the curie temperature was shifted low temperature. The 0.9BaTiO3-0.1SrTiO3 was appeared stable property in temperature vs. permittivity. Also, 0.9BaTiO3-0.1SrTiO3 was showed stable dielectric properties at 25~85[C]. V-I properties of specimen were observed in the temperature range of 21~143[C], were divided into three regions. the region I below 10[kV/cm] was shown Ohmic conduction, the region II from 10 to 30[kV/cm] was explained by the poole-Frenkel emission theory and the region III above 30[kV/cm] was analysed by the tunneling effect.

생약재 첨가 사료를 투여한 넙치(Paralichthys olivaceus)의 비특이적 면역반응, 혈액성분 및 항병력 효과

정승희,이주석,한형균,전창영,이해영 한국어병학회 2002 한국어병학회지 Vol.15 No.1

본 연구는 식물성 생약재의 열수추출이 농도별로 첨가된 사료를 넙치(Paralichthys olivaceus)에 경구 투여한 다음 비특이적 면역반응 및 질병 저항성의 향상여부를 알아보고자 하였다. 실험에는 약쑥과 삼지구엽초를 7:3(w/w)의 비율로 열추출한 후, 0%, 0.1%, 0.5% 및 1%의 농도로 첨가하여 만든 2종류 혼합생약재(2-혼합구)와 약쑥, 삼지구엽초, 연교, 구절초, 박하, 지유, 삼백초, 상백피, 팔각의 9종류 생약재가 동일한 농도로 열수추출한 후 제작한 9종류 혼합생약재(9-혼합구)를 사용하였다. 이들 농도별 첨가사료를 넙치(평균 10.3±2.5g)에 12주 동안 경구 투여하면서 혈청내 라이소자임 활성, 혈청의 Escherichia coli에 ??살균능력 및 혈액학적 변화를 조사하였다. 그리고 최종 투여 12주 후에 넙치 에드와드병의 원인균 Edwardsiella tarda의 생균 공격실험을 실시하여 상대생존율(RPS)로써 저항성 향상효과를 살펴보았다. 2-혼합구 0.1%는 비특이적 면역활성을 크게 증가시켰으며, 상대생존율이 67%로 높게 나타나 가장 효과적인 질병 저항성 향상효과를 보였다. 따라서 2-혼합구 0.1%는 넙치 체내 비특이적인 면역기구를 자극함으로써 어체의 자연저향성을 증강시켜 세균성 질병의 감염에 대한 방어력을 상당히 향상시킬 수 있을 것으로 사료된다. 9-혼합구 0.1% 및 0.5%는 비록 비특이적 면역활성은 증가시키지 못하였으나, 상대생존율은 각각 53%를 나타내어 질병 저항성을 일부 향상시키는 효과가 있었다. Effects of medicinal herb extract on nonspecific immune responses, hematology and disease resistance against Edwardsiella tarda in olive flounder, Paralichthys olivaceus were evaluated. Wormwood, Artemisia asiatica NAKAI and barrenwort, Epimedium koreanum NAKAI were mixed at a ratio of 7 : 3 (w/w) for 2-herbs extract and wormwood, barrenwort, Korean forsythia, Forsythia koreana NAKAI, chrysanthemum, Chrysanthemum zawadskii var. latilobum KITAMURA, peppermint, Mentha arvensis L. var, piperascens MALINV., great burnet, Snaguisorba afficinalis L., Lizard tail. Saururus chinensis BAILL., mulberry, Morus alba L., and star anise, Illicium varum HOOK, f, at the same weight for 9-herbs extract. Two-herbs of 9-herbs extract were prepared by heating after adding 10㎖ of distilled water per g of the herb mixtures. Fish (10.3±2.5g) were fed the experimental diets supplemented with the 2-herbs or 9-herbs extract at the different concentrations of 0%, 0.1%, 0.5% and 1% per kg diet for 12 weeks. Lysozyme and bactericidal activities of serum, and hematological characteristics were examined during experimental period. After feeding test period, all experimental groups were challenged with E. tarda. Lysozyme activity from the fish fed the diet supplemented with 0.1% or 0.5% of 2-herbs extract was significantly higher than the control. But there was no difference both in bactericidal activity and hematology among each group. Sixty seven % of relative percent survival values (RPS) in the group fed the diet supplemented with 0.1% of 2-herbs was higher than the other group and the control. These results suggest that supplenmentation of 0.1% of 2-herbs extract to a commercial diet may enhance disease resistance in olive flounder. Although both 0.1% and 0.5% 9-herbs extract did not improve non-specific immune reponses, they could enhance disease resistance of 53% RPS, respectively.

원자력발전소 디지털 계측제어 시스템의 전자기파 간섭에 관한 연구

문채주,정해덕,양충렬 木浦大學校 工業技術硏究所 2000 工業技術硏究誌 Vol.10 No.-

The increasing use of microprocessor-based digital technology in safety related system has introduced concerns with respect to electrical noise in the nuclear power plant. Digital technology has been performance advancements but on the other hand, has an adverse impact on the operation of digital system in connection with EMI/RFI and power surge. Therefore, digital equipment is needed to minimize an electrical noise from the first design stage and to ensure EMC design in the final design stage. The purpose of this study is to assist the engineer/designer in minimizing the EMI problem and establishing equipment qualification for EMI/RFI by presenting a discussion of technical sound alternative for EMI and analysis of related requirements, Mil-Std-461D and EPRI TR-102323. And also, this paper suggests the EMI/RFI requirements for digital control system design based on the Mil-Std-461D and the EPRI TR-102323 to site mapping.

반정량 식품섭취빈도조사지를 이용한 한국노인의 영양섭취 실태조사

이해정,박선주,김정희,김초일,장경자,임경숙,김경원,최혜미 대한지역사회영양학회 2003 대한지역사회영양학회지 Vol.8 No.3

The aim of this study was to assess the nutrient intakes of the elderly subjects in Korea. Dietary assessment was carried out using a semi-quantitative food frequency questionnaire (SQFFQ) developed by our laboratory, which included 98 commonly consumed food items selected from 1998 National Health and Nutritional Survey for Korean population. Subjects (n = 2,660) aged 50yr and over were recruited in Seoul, 6 metropolitan cities, and 8 mid-size cities. Calcium and riboflavin intakes of the elderly subjects aged 65 yr and over (n = 1,974) were much lower compared with Korean RDA. Nutrient intakes of the three age group (50 - 64 yr, 65 - 74 yr, 75 yr and over) were decreased as age increased in male and female elderly. Nutrient intakes of male elderly, 75 yr and over, were significantly decreased while in female elderly nutrient intakes were gradually decreased as age increased. Over 30% of the elderly subjects did not meet 75% RDA for calcium, iron, vitamin A, and riboflavin. The proportion of the elderly subjects whose intakes were below 75% RDA was much higher than the elderly whose intakes were above 125% RDA, especially among the elderly aged 75 yr and over. This study revealed that the Korean elderly had inadequate intakes for many nutrients. This will cause a serious nutritional problem for the elderly.

수목장(樹木葬)의 특성에 관한 고찰

서주환,최현상,정해천,승지현 경희대학교 디자인연구원 2005 예술· 디자인학연구 Vol.8 No.2

To secure a space for graveyard in a funeral has become one of the new issues in Korea. This caused the problems of graveyard shortage, destruction of national landscape, inroad of territory, and ecological environment. However, In eco-friendly method of funeral, the Woody Plant Funeral is a new form of Funeral to bury the ashes of the deceased under the wood so it participate with eternal life in wood and forest by provision of nature(wood and people return to nature to be born in nature). The purpose of this paper is to explain one of the counterplan which the Woody Plant Funeral solve graveyards problem.

흰쥐 대뇌피질에서의 Cholecystokinin Octapeptide의 分布

황정한,조희중,김은희,박매자,배용철,홍해숙,주강 慶北大學校 醫科大學 1990 慶北醫大誌 Vol.31 No.4

흰쥐 대뇌피질에서 cholecystokinin octapeptide(CCK-8)의 분포를 관찰하기 위하여 간접면역형 광법을 행하여 관찰해 본 결과 다음의 많은 부위에서 CCK-8양성세포 및 양성섬유를 관찰할 수 있었다. 신피질: CCK-8양성세포는 주로 제2, 3층에서, 양성섬유는 제2, 3 그리고 6층에서 저밀도를 나타내었다. 후구: 전후핵에서 많은 CCK-8양성세포 및 양성섬유를 관찰하였다. 이상엽 및 후내야: 양성세포는 주로 제2층에서 관찰되었으며 양성섬유는 제2층에서 중밀도 제3층에서 저밀도로 관찰되었다. 해마체: 많은 양성세포 및 고밀도의 양성섬유가 원추세포층에서 관찰되었다. In order to investigate the distribution of immunoreactive cholecystokinin octapeptide (CCK-8) containing neurons in the cerebral cortex of the rat, brains of the rats were processed for indirect immunofluorescent technique. The results obtained were as follows. Neocortex; CCK-8 immunoreactive cell bodies were found in layer Ⅱ and Ⅲ and immunoreactive axon terminals were heaviest in layers Ⅱ, Ⅲ and Ⅵ. Olfactory bulb; The anterior olfactory nucleus contained numerous CCK-8 immunoreactive cell bodies and a moderate density of immunoreactive axon terminals. Piriform and entorrhinal cortex; CCK-8 immunoreactive neurons and axon terminals were observed in layer Ⅱ and Ⅲ. However, they were more frequent in layer Ⅱ. Hippocampus; CCK-8 immunoreactive cell bodies and axon terminals were found in pyramidal layer.

경기도 지역 정신보건 사업의 추진배경과 정책결정과정

이충순,윤배중,이주훈,이종국,고영,이영문,최향순,김혜숙 용인정신의학연구소 1997 용인정신의학보 Vol.4 No.2

흰쥐 腦의 中心扁桃核에서의 Substance P 및 Enkephalin 함유구조의 형태학적 특징

마도훈,조희중,김은희,박매자,배용철,홍해숙,주강 慶北大學校 醫科大學 1990 慶北醫大誌 Vol.31 No.4

흰쥐 뇌의 중심편도핵에서의 substance P (SP) 및 Enkephalin (ENK) 함유신경세포 및 축삭종말의 분포를 관찰하기 위하여 peroxidase antiperoxidase법을 행하여 다음의 결과를 얻을 수 있었다. SP함유신경세포는 중심편도핵의 medial zone에 분포하였고 SP함유축삭종말은 lateral capsular zone에서 고밀도로 관찰되었다. SP함유신경세포는 원형 내지는 타원형이었고 2∼3개의 근위수상돌기(proximal dendrite)를 가졌다. ENK함유신경세포 및 축삭종말은 공히 central 및 lateral capsular zone에 존재하였다. ENK함유 신경세포는 직경이 약 17-24㎛ 정도였고 3∼4개의 근위수상돌기를 관찰할 수 있었다. The central amygdaloid nucleus is rich in a number of neuropoptides. The present study examines the distribution and morphological characteristics of substance P (SP) and leucine-enkephalin (ENK) containing neurons in this nucleus. The results obtained were as follows: SP immunoreactive cells were observed within the medial zone and SP immunoreactive axon terminals were heaviest within the lateral capsular zone. The immunoreactive cells were round or oval shape (diameter, 15-20㎛) and had two or three proximal dendrites. ENK immunoreactive cells and axon terminals located within central and capsular zones. The immunoreactive cells were round or oval shape (diameter, 17-24㎛) and had three or four proximal dendrites.

소아에서의 급성 파종성 뇌척수염의 임상적 고찰

조수진,박은애,유은선,김혜순,손세정,서정완,이승주,한후재 이화여자대학교 의과대학 2003 EMJ (Ewha medical journal) Vol.26 No.2

목적: 급성 파종성 뇌척수염은 감염이나 예방 접종 후 발생하는 중추 신경계의 급성 자가 면역 염증성 질환으로 탈수초를 일으킨다. 신경학적인 증상으로 발현되고 대부분 환전히 회복되지만 신경학적 후유증을 남기거나 사망 할 수도 있다. 이에 저자들은 본원에서 발생 한 14명을 분석하여 조기 진단과 치료에 도움을 주고자 하였다. 대상과 방법: 1998년 3월부터 2003년 8월까지 이대목동병원에서 급성 파종성 뇌척수염으로 진단 받은 14명의 의무기록을 후향적으로 조사하였다. 결과: 환자들의 평균 발생 연령은 5±7.8개월이였고, 특정계절이나 연도에 집중되어서 나타나지는 않았다. 선행질환은 주로 비특이적인 상기도 감염이 가장 많았고, 초기증상으로는 경련이 가장 많았다. 그 외에 의식저하나 운동장애도 있었다. 뇌척수액 검사에서 백혈구 증가증이 발견된 경우는 있었으나 단백이 증가된 경우는 없었다. 뇌 자기공명 촬영에서 T2 증강시 뇌백질과 기저핵에 고음영의 다발성 병소가 발견되었고 추적 촬영에서 대부분에서 소실되었다. 뇌파 검사가 시행되었던 경우 전반적인 서파가 가장 많았고 국소적인 극파가 나온 경우도 한 명 있었다. 환자들은 정맥 면역 글로블린과 메틸프레드니졸론으로 치료하였고 치료 시작 후 3~7일내 증상이 호전되었다. 모든 환자를 2달 이상 추적 관찰하였고 항경련제가 지속적으로 필요한 정도의 경련성 질환이 두 명, 신경아교증이 남아잇는 경우가 한 명, 외래에서 다발성 경화증이 의심되는 경우가 한 명 있었다. 결론: 급성 파종성 뇌척수염은 침범 부위에 따라서 다양한 임상 상으로 나타나며 면역 글로블린과 메틸프레드니졸론이 치료에 효과적이였다. 본 연구에서는 대상 환자수가 적어 신경학적 후유증의 위험요소는 밝힐 수는 없으나, 예후는 검사소견과 연관되어 있지는 않았고, 대부분에서 양호하여 완전히 회복되었으나, 신경학적 후유증이 남은 경우도 있었다. Objective:Acute disseminated encephalomyelitis(ADEM) is an acute demyelinating autoimmune inflammatory disease of the central nervous system which develops after infection of vaccination. It may be fatal, and produce a permanent residual static disability or fully recover. We retrospec-tively studied 14 cases to investigate the clinical findings and outcome of ADEM. Methods : 14cases of ADEM diagnosed at Ewha Womans University Mokdong Hospital from 1998 to 2003 were retrospectively reviewed. Results : The age of onset was 5years±7.8 months and no seasonal clustering was found. The time of onset of symptoms was between 3 to 30 days. The preceding events were nonspecific upper respiratory infections in 9 cases, aseptic meningitis in 4 cases, and gastroenteritis in one case..The initial symptoms were seizure, altered consciousness, hemiparesis, fever, headache, and vomiting. Brain MRI showed multifocal high signal intensity lesions on T2 weighted image mainly in the cerebral whith matter, basal ganglia and periventricular white matter. EEG was performed in some cases and showed generalized or focal slow waves and only one case showed focal spikes. Patients were treated with IV globulin and methylprednisolone and the symptoms improved within 3-7 days after treatment. All patients were followed up for more than 2 months and most of them fully recovered except two. Conclusion : ADEM presents in various clinical manifestations depending on its involvement of the brain lesions. Most cases recovered fully but in some cases, residual permanent neurologic sequelae remained.

In situ hybridization기법을 이용한 shiga toxin-producing Escherichia coli의 검출 및 stx2의 염기서열분석

김의종,이동영,최혜심,주세익,이정희,김상현,반성환 대한임상미샐물학회 2000 Annals of clinical microbiology Vol.3 No.2