좌측흉수로 발현된 Boerhaave 증후군 1예

이준,변유미,조민근,조주연,원경준,김영대,박찬국,김만우,유재근,서홍주,이석기 朝鮮大學校 附設 醫學硏究所 2008 The Medical Journal of Chosun University Vol.33 No.2

구토 후 발생한 토혈을 주소로 내원한 환자에서 좌측 늑막 삼출 동반 시 식도 파열의 가능성을 고려하여 흉수 천자 및 지속적인 흉부 단순 촬영의 추적관찰이 필요하며 식도 파열이 배제된 후 환자의 생체 징후 및 토혈 양을 파악하여 내시경 검사 시기를 신중히 결정하는 것이 좋을 것으로 생각된다. 본 증례는 토혈을 주소로 내원하여 Mallory-Weiss 증후군 의심 하에 내시경을 통한 치료 시행 후 추적 관찰에 의해 진단된 Boerhaave 증후군을 경험하였기에 보고하는 바이다. Boerhaave's syndrome is a spontaneous perforation of the esophagus most commonly resulting from a sudden increase in intraesophageal pressure combined with negative intrathoracic pressure caused by straining or vomiting. Surgery should generally be performed within 24 hours because mortality approached 30 to 50 percent in which surgery was delayed. Therefore, early diagnosis and prompt surgical repair are critical for survival. We have experienced a case of Boerhaave's syndrome in a patient presenting with hematemesis with left pleural effusion without any signs or symptoms of pneumomediastinum or pneumothorax.

Dimecron 중독증 환자 6예

류하근,박봉안,류주성,유재등,김정수,김치훈,송종오 건국대학교 의과학연구소 2001 건국의과학학술지 Vol.11 No.-

The authors experienced 6 cases of Dimecron intoxication, an organophosphate, that required mechanical ventilator treatment. Among 6 cases, 4 cases were intoxication due to suicidal attempt and 2 cases were due to accidental exposure. Among 4 cases of intoxication due to suicidal attempt, only one patient recovered even after aggressive treatments using gastric lavage, mechanical ventilation, atropine and PAM(pralidoxime). Two cases of intoxications due to accidental exposure, 1 case needed mechanical ventilation. Both cases were recovered without any sequele, however. Organophosphate, especially Dimecron, showed high rates of resfiratory muscle paralysis and mechanical ventilator support. The mortality rate of organophosphate agents can be decreased by education, wearing protectors, and aggressive mechanical ventilator treatment when respiratory failure develops.

전류응력이 고탄소강의 미세조직에 미치는 영향

지주현,이태근 서울産業大學校 2005 논문집 Vol.54 No.1

잔류응력은 재료에 부하되는 응력 패턴에 따라 구조물에 상이한 영향을 미친다. 특히 쇼트피닝 처리는 압축잔류응력에 많은 영향을 받고 있다. 이러한 잔류응력을 정확히 모니터링 할 수 있다면 실기 부품의 안전성 유지와 보수기간 및 잔존수명 예측에 유용하게 사용할 수 있다. 본 논문은 쇼트피닝에 의한 잔류응력과 미세조직 변화를 실험적으로 관찰하였다. 쇼트피닝 투사속도가 증가함에 따라 변형층의 두께가 증가하였다. 경도 및 압축잔류응력은 표면에서 깊이 방향으로 증가하였고, 내부에 형성된 압축 잔류응력의 깊이와 유사하게 감소하였다. 투사속도가 증가함에 따라 압축 잔류응력과 을력분포는 증가하게 되고, 입자 크기는 미세화 하였고 침상의 Bainite 조직이 발달 함에 따라 경도값도 증가하였다. Residual stress gives different impact on the microstructures according to the stress pattern loaded to materials, and it is useful for the prediction of safety maintenance, maintenance period and residual life of parts for practical training. This paper studied the changes of the residual stress and microstructure of SK-5M high carbon steel by applying shot peening. As shot ball speed of shot peening increases, the thickness of deformation layer has increased. Hardness and compressive residual stress increased vertically from surface. As compressive residual stress and its distribution increased, grain size became refined and Bainite structure of bed increased hardness.

液膜法에 의한 구리 및 코발트이온의 分離時 共存鹽의 影響

金柱奉,姜奉根,李成植,全成均 東亞大學校 大學院 1988 大學院論文集 Vol.13 No.-

The effect of co-existing salts on the extraction of copper ion with LIX65N and cobalt ion with PC88A in aqueous solution and the copper permeation through the supported liquid membrane with LIX65N has been studied. 1.The maximum extraction constant, K?? of copper ions was obtained when the mole ratio of LIX65N concentration versus the concentration of copper ions was 6-fold. 2.The over all extraction constant, k?? and distribution ratio, D were inceased linealy wiht increasing difference of final pH and initial pH in aqueous solution and were decreased with increasing concentration of co-existing anion salts. 3.The extraction of cobalt ion with PC88A-Toluene system, hydrogen ion concentration were increased wiht increasing of distribution ratio and D was increased linealy wiht increasing PC88A concentration. 4.The rate of copper permeation through the supported liquid membrane wiht LIX65N-Toluene system were increased with increasing of concentration of etractant and hydrogen ions between up-stream and down-stream solution. 5.The initial flux of copper ions was decreased wiht increasing concentration of co-existing salts both up-stream and down-stream solution.

In situ 고상 에피택시 방법에 의한 CoSi₂/Si(111)구조의 형성

이정주,강민성,김현수,최치규,이운환,이종덕,이영백,김건호,이정용 濟州大學校 基礎科學硏究所 1996 基礎科學硏究 Vol.9 No.2

초고진공에서 공상에피택시(solid-phase epiyaxy, SPE) 방법으로 CoSi₂를 Si(111)기판 위에 에피택시 성장시켰다. 2MeV⁴He++ ion후방산란 분광기와 사중결정 x-선 회절기 및 고분해 투과전자 현미경을 이용하여 성장된 CoSi₂의 상과 조성, 결정성, 그리고 계면의 미시구조를 조사하였다. 초고진공상태의 실온에서 Si(111)-7X7기판에 Co를 약 20 ~50 ?? 중착한 후 SPE에 의하여 실리사이드를 형성시키는 경우 600℃에서는 B-형의 CoSi₂가, 그리고 700℃에서는 A형의 CoSi₂가 선택적으로 에피택시 성장하였으며, 정합성은 B-CoSi₂[110]//Si[110] and CoSi₂(111)//Si(111)이, 그리고 700℃에서는 A-CoSi₂[110]//Si[110], CoSi₂(002)//Si(002)을 나타내었다. Epitaxial films of CoSi₂were grown on Si(111) substrates by in situ solid-phase epitaxy in a ultrahigh vacuum. The phase, the chemical composition, the crystallinity, and the microstructure of the Silicide/Si interface were investigated by 2-MeV⁴He++ ion-backscattering spectrometry, quadruple crystal X-ray diffractometry, and high-resolution transmission eletron micorscopy. High-quality films of either B-type or A-type CoSi₂ could be grown selectively on Si(111) substrates by depositing ~ 20 ~ 50 ?? of Co on a Si(111)-7X7 substrate followed by in situ annealing at 600℃ or 700℃ for 10 min. The matching face relationships are CoSi₂[110]//Si[110] and CoSi₂(111)//Si(111) by B-type CoSi₂ and CoSi₂[110]//Si[110]//Si[110] and CoSi₂(002)//Si(002) for A-type CoSi₂.

지방산을 투여한 마우스의 Salmonella typhi에 대한 항체 생성력

함건주,이원재,이정화,김용호 THE KOREAN SOCIETY FOR BIOMEDICAL LABORATORY SCINE 1995 Journal of biomedical laboratory sciences Vol.1 No.1

지방산 식이가 항체 생성력에 미치는 영향을 알아 보기 위하여 ICR계 마우스를 기본사료만 투여한 대조군, 돈유 투여군, 그리고 정어리유 투여군으로 나눈 다음, 추출한 지방산을 8주동안 경구 투여한 후, 마우스 간조직 중의 지방산 조성 변화, Salmonella typhi에 대한 항체 역가, 복강내 대식세포의 탐식능 및 비장세포의 증식능을 비교 관찰한 결과는 다음과 같다. 대조군에 비하여 돈유 투여군에서는 C18:3, C20:3, C20:4 등의 지방산이 감소하였고, 정어리 투여군에서는 C18:1, C18:2/C18:0를 제외한 주요 불포화 지방산 성분이 감소되었다. 대식세포의 탐식능에서는 대조군에 비하여 실험군의 대식세포 탐식능이 저하되었고, 마우스 생체 항체 생성력은 돈유 투여군이 대조군 및 정어리유 투여군보다 높은 역가를 나타내었으며, 마우스 비장세포 배양 상층액 중의 항체 역가는 마우스 생체 역가와는 다르게 정어리유 투여군이 더 높은 역가를 나타내었다. 또한 비장세포 증식능은 지방산 투여군이 대조군보다 높았고, 그 중에서도 정어리유 투여군이 돈유 투여군보다 높은 증시능을 나타내었다. 이러한 차이는 포화, 불포화 지방산 균형 증가에 의하여 면역 억제력이 높아진 결과로 생각되며, 포화 지방산의 투여는 항체 생성력을 현저하게 증가시킬 수는 있으나 면역억제력은 나타내지 못함을 알 수 있었다. The effect of different fatty acids supplementation on antibody production of Salmonella typhi was studied in ICR mice. Subjects supplemented their diets with 50㎍ of extracted pig oil(as a saturated fatty acid) and fish oil (as a unsaturated fatty acid) / 2 days for 8 weeks. Blood was collected control and experimental groups of mice after 8 weeks of oil supplementation. The different fatty acids supplementation reduced unsaturated fatty acids composition in mice liver such as C18:3, C20:3 and C20:4 except C18:1 and C18:2/C18:0 in fish oil and pig oil groups compared to control group. Also, the phagocytic activities of mice macrophages for Candida albicans was reduced by 6% in pig oil group and 9% in fish oil group than control group. The antigen-stimulated lympocyte proliferative response was significantly increased by fatty acid in pig oil group(48%) but 57% in fish oil group. The different fatty acid supplementation increased antibody production in both experimental groups than control group ; this increase was only significant in pig oil group(1:2⁴) on mice but not in fish oil group(1:2 )compared to control group(1:2 ), however, increased antibody titer in both groups in-vitro spleen cell culture supematant(1:2³in fish oil group and 1:2²in pig oil group compared to control group 1: 2 ). Thus, fish oil supplementation was immunosuppresive agent in macrophage phagocytosis, in-vivo antibody producibilities and lympocyte proliferation but pig oil supplementation was more effective than fish oil in antibody formation in-vivo. We find that antibody producibilities affected by fed on different fatty acids were considered by balance between saturated and unsaturated fatty acid, and C20:3/C20:4 ratio. Also, it affected to antigen-stimulated lymphocyte proliferation and macrophage phagocytic activities.

졸겔법에 의한 티탄산납 제조 및 유기산 흡착특성

김주호,송지훈,신보철,한상오,송근호,이광래 江原大學校 産業技術硏究所 2001 産業技術硏究 Vol.21 No.B

Generally PbTiO3 if manufactured in a form of thin films which is useful for the application infrared sensors and non-volatile memory devices. Moreover PbTiO3 has a characteristic of adsorption for organic acid as well as electronic property. Organic acid adsorption properties of PbTiO3 powder prepared by sol-gel method was compared with the powder purchased from Aldrich Co. Crystallization and particle size of PbTiO3 are influenced by process variable, such as dilution of sol solution, catalysis, calcination temperature, calcination time, etc. As the size of PbTiO3 power decreased until several nanometers, adsorption of acetic acid and formic acid was increased 1.5-fold and 1.2-fold respectively

인쇄회로기판의 전과정평가

박필주,이보삼,이건모 한국전과정평가학회 2000 한국전과정평가학회지 Vol.2 No.1

C전자에서 제조되는 인쇄회로기간에 대하여 원료채취부터 제품생산까지의 cradle to gate 전과정평가를 수행하였다. 대상제품은 유리섬유 및 에폭시 수지를 이용하여 HDD용으로 제조되는 4층 도체패턴의 PCB이다. 데이터는 현장 데이터를 적용하였으며, 현장 데이터 취득이 어려운 경우 데이터베이스를 사용하였다. 영향평가는 분류화, 특성화, 정규화 및 가중치부여 단계로 수행되었으며, 고려된 영향범주는 ARD, GW, OD, POC, Acid, Eut, ET 및 HT이다. 불확실한 데이터 값의 변화가 전체 결과값에 미치는 변화정도를 알아보기 위하여 민감도 분석을 수행하였다. LCA 수행 결과 PCB 제조공정은 OD 범주를 제외한 모든 영향범주에서 가장 큰 영향을 미치는 것으로 나타났다. 이는 PCB 제조시 사용된 저녁에서 기인한 값이다. PCB 제조시 사용되는 화학약품은 질량기준 사용량은 많지만, 환경에 미치는 영향은 적은 것으로 나타났다. 사용된 데이터에 따른 민감도 분석 결과 PCB 제조공정의 전력사용량은 GW 및 POC 범주에 매우 민감하게 나타났으며, 할당방법에 의한 분석 결과 전 영향범주에서 25% 이내의 차이를 나타냈다. Life Cycle Assessment on Printed Circuit Board produced in C Electronics Co. was carried out. The system boundary encompasses raw material acquisition to the manufacturing of PCB(or cradle to gate). The product is FR4 PCB used for a component o HDD. FR is a mixture of glass fiber and epoxy resin. Generally site specific data were applied. However, database were used when it is hard to get site specific data. Impact assessment was carried out consecutively as classification, characterization, normalization and weighting. Considered Impact categories are ARD, GW, OD, POC, Acid, Eut, ET, HT. Sensitivity analysis is accomplished to find out how the variation of unreliable data affects the result of LCA. The PCB manufacturing was identified as the most contributing activity to all impact categories except OD. This is mainly due to the electricity consumed in the manufacturing phase. Even though the large amount of chemicals are used for PCB manufacturing in mass, environment impact of those chemicals is much less than they were consumed. he sensitivity of data method shows that the amount of electricity consumed in the PCB manufacturing is considerably sensitive to POC and GW. The sensitivity results of allocation method in th PCB manufacturing on the LCA indicate approximately 25% difference in all impact categories.

전신마취 후 발생한 악성고열증 환자의 치료 경험

이근무,정승환,이정한,정순호,최영균,김영재,신치만,박주열,이영민 白中央醫療院 2005 仁濟醫學 Vol.26 No.1

Malignant hyperthermia is the disorder of calcium regulation within skeletal muscle associated predominantly with anesthesia. It is triggered by volatile anesthetics and depolarizing neuromuscular blocking agents. We experienced a case of malignant hyperthermia. 50 years old female patient was transferred to our emergency room that she was developed tachyarrhythmia and high fever. She was taken arthroscopic examination under the general anesthesia with enflurane and succinylcholine. We suspected malignant hyperthermia and promptly treated her with dantrolene sodium. She was developed disseminated intravascular coagulopathy and acute renal failure then we were intensive care to her. She was discharged without sequela. We experienced successful management of malignant hyperthermia.

LCA 를 통한 가전제품 폐기단계의 환경부하 및 주요 환경영향 규명

박필주,노재성,이건모 한국전과정평가학회 1999 한국전과정평가학회지 Vol.1 No.1

전과정평가는 원료취득 및 가공, 제품제조, 사용 및 폐기단계에서 발생되는 환경부하를 정량화하고 이들이 환경에 미치는 영향을 평가하는 과정으로 이루어진다. LCA 결과의 신뢰도를 제고시키기 위해서는 제조단계나 사용단계와 마찬가지로 폐기단계도 중요한 공정으로 간주되어야 한다. 여기서는 노동-자본 결합형 재활용 기술을 적용한 폐가전제품 처리방법에 대해 조사하였으며, 재활용공정과 소각공정을 중심으로 국내 상황을 고려한 데이터베이스를 구축하였다. 또한, 냉장고의 폐기단계 LCA를 수행하여 주요이슈를 규명하였다. 주요이슈 규명은 각 영향범주별 주요이슈 규명과 전체 시스템의 주요이슈 규명의 두가지 방법에 의해 수행되었다. 수행결과 분해공정, Cabinet foam, 단열재공정이 주요 이슈로 규명되었으며, 냉매제의 대기 방출, PCB 소각 등으로 인한 환경부하가 전체의 50% 이상을 차지하는 것으로 나타났다. 또한 지구온난화, 인간독성(대기), 산성화 등의 영향범주에 큰 영향을 미치는 것으로 나타났다. Life Cycle Assessment(LCA) is a procedure evaluating environmental burdens associated with a product, process, or activity from raw material aquisition to disposal. Disposal phase as well as manufacturing or use phase should be considered as an important process in order to evaluate confidence in the LCA results. In this study, we examined the application of management method involved with manpower-capital conbined recycling technique on home appliances in disposal phase. Database, considered as national specific situation, recycling processes and incineration has been established. Also, we carried out the LCA on a refrigerator in the disposal phase and identified the key issues. Two methods for the identification of key issues were studied, one for impact category and the other for whole system. As a result, Identified key issues are disassembly, cabinet foam, urethane. So are coolant, PCB incineration. These are more than 50% of whole environmental burdens. Also, The value of global warming, human toxicity of air emission, and acidification are high.