CBD 방법에 의한 CdS1-xSex 박마의 열처리에 따른 광전기적 특성

문종대,정태수,신현길,김택성,신영진,홍광준,유상하,서상석,최승평,이상열,신용진,이관교,김혜숙,윤은희,김승욱,전승룡 한국센서학회 1995 센서학회지 Vol.4 No.1

Polycrystalline CdS_(1-x)Se_x, thin films were grown on ceramic substrate using a chemical bath deposition method. They ere annealed at various temperature and X-ray diffraction patterns were measured by X-ray diffractometer in order to study CdS_(1-x)Se_x, polycrystal structure using extrapolation method of X-ray diffraction patterns for the CdS. CdSe samples annealed in gas at a 0 it was found hexagonal structure which had the lattice constant a_0=-4.1364Å, c_0=6.7129Å in CdS and a_0=4.3021Å, c_0=7.3021Å in CdSe. respectively. Hall effect on these samples was measured by Van der Pauw method and then studied on carrier density and mobility depending on temperature. We measured also spectral response, sensitivity(γ), maximum allowable power dissipation and response time on these samples.

수소동위원소 교환반응 촉매 지지체의 경도에 대한 용매의 효과

이성호,김광락,안도희,이한수,정흥석,강희석,백승우,최희주 한국공업화학회 2000 응용화학 Vol.4 No.1

Polymeric catalyst supports for hydrogen isotope exchange reaction were prepared by using the various good and poor solvents. Effect of solvent was investigated experimentally on the hardness of these polymeric supports. P55OE1 showed the highest hardness and low ratio of micro pore area to total pore area. P55TE2 showed high hardness and ratio of micro pore area to total pore area. Therefore P55TE2 was expected to be the best polymeric support with regard to the performance and the hardness of the catalyst.

Gentamicin 투여에 따른 혈중 및 요중 β2-Microglobulin 동태에 관한 연구

이정상,신영태,정순일,이문호,김병국,김승택,최경원 대한핵의학회 1980 핵의학 분자영상 Vol.14 No.2

저자는 1980년 3월부터 7월까지 서울대학교병원 내과에 입원하여 게타마이신을 투여받았던 각종 감염증환자 10예를 대상으로 겐타마이신의 혈중농도, 혈청크레아티닌, 혈중 및 24시간 요 베타-2-마이크로글로불린을 측정하여 다음과 같은 결론을 얻었다. 1) 겐타마이신의 혈중농도는 최고농도(peak level)는 4.5∼8.2μg/ml, Trough치는 0.2∼2.1μg/ml를 유지하여 안전치료 영역내에 있었다. 2) 혈청 크레아티닌(creatinine)치는 겐타마이신 투여기간중 대상 전원에서 통계학적으로 유의한 증가를 보이지 않았다. 3) 혈중 베타-2-마이크로글로블린치는 겐타마이신 투여기간중 대상 전원에서 통계학적으로 유의한 증감을 보이지 않았다. 4) 24시간 요 베타-2-마이크로 글로블린은 겐타마이신 투여후 전예에서 통계학적으로 유의한 증가를 보여 제 5일에 기저치보다 평균 5.8±1.62배 증가하였으며, 그 이후로는 감소하는 경향을 보였다. 이상의 결과를 종합하면 24시간 요 베타-2-마이크로글로블린 측정은 겐타마이신의 초기 신독성을 예민하게 반영한다는 사실을 알 수 있었으며, 이의 임상적 신독성과의 관계는 앞으로 추시가 필요하다고 생각된다. Gentamicin is useful to the Gram negative bacterial infection, but its nephrotoxicity is a serious problem and the incidence is probably increasing. The toxicity of gcntamicin to the kidney is site-specific to the proximal tubule. In this study, we measured daily peak and trough level of gentamicin, serum creatinine, serum Beta2-microglobulin and 24-hr urine Beta2-microglolbulin in 10 gentamicin treated patients. All the patients had their peak levels of gentamicin in the safe therapeutic range, and their trough level showed no evidence of gentamicin accumulation. There was no patient who showed his daily serum creatinine and Beta2-microglobulin rise significantly. But 24-hour urine Beta2-microglobulin showed significant rise from basal level(mean 5.8±1.62×) on the 5 th day of gentamicin treatment. Thus, serial monitoring of proximal tubular function with urinary Beta2-microglobulin excretion has potential value in the assessment of insults of gentamicin to this site. But clinical significance of raised uriry Beta2-microglobulin excretion in relation to the serum creatinine should be further studied.

2D 영상보간:부화소 단위의 에지 검출

최재호,이종수,강금부,양우석 한국센서학회 1998 센서학회지 Vol.7 No.5

In this paper, we present a new interpolation scheme for image enhancement using nonlinear operator. In general, interpolation techniques are based on linear operators which are essentially lowpass filters, hence, they tend to blur fine details in the original image. In our approach, the operator itself balances the strength of its sharpening and noise suppressing components according to the properties of the input image data.

계면활성제 용액의 미셀형성에 있어 FT - PGSE 의 응용

남기대,최성옥 한국유화학회 1999 한국응용과학기술학회지 Vol.16 No.1

계면활성제는 수용액에서 미셀을 형성함에 있어서 자기확산이 분자 운동과 상변화에 대하여 자세한 정보를 제공하고 공업적으로 응용할 수 있는 기술이 점차 증가하고 있다. 계면활성제가 미셀을 형성함에 있어 자기확산 정도는 화학구조의 변화성과 상호 결합 및 회합현상에 매우 민감한 것은 사실이다. 특히 계면활성제 용액의 넓은 범위의 분자 시스템과 콜로이드 상태의 변화성은 다향한 물리, 화학적 성질에 기여됨이 많다. 더욱이 미셀 형성에서 자기확산 계수는 분자 치환에 직간접적으로 상호관계가 있어 NMR 분광학에서 스핀 이완속도의 해석과 분자의 재배열, 스핀 이완에 대한 모델선정 등에 많은 관심을 갖는다. 그중 미셀형성에 있어서 자기확산에 대한 측정 방법중 가장 많이 이용되고 있는 Fourier Transform Pulsed Gradient Spin Echo(FT-PGSE) 측정법은 계면활성제의 미셀형성에 대한 상변화성 및 물리, 화학적 성질을 다루는데 새로운 도구로 제공되고 있다. 이는 이 계통의 기술적 측정방법에 있어서 적절한 개선과 새로운 응용분야를 확장하는데 있어서 많은 가능성을 갖고있다. 그리하여 이들에 대한 역사적 배경과 기초적인 이론을 가지고 미셀 형성에 있어 자기확산에 대한 개념을 말하고 그에 대한 응용성을 계통적으로 설명하고자 한다.

Tropane Spirohydantoin들의 합성 및 구조분석

정대일,이도훈,송주현,이용균,최순규,박유미,한정태 동아대학교 환경문제연구소 2006 硏究報告 Vol.28 No.1

The tropane ring system is an important substructure in a number of natural products and synthetic compounds of biological and medicinal importance. As a result of the significance of the tropane ring system, the purpose of this study is the synthesis of anticonvulsant compounds of new s tructure anticipated anticonvulsant activity. After we first synthesized the various N-substituted nortropinone derivatives, we prepared new nortropane alkaloids and nortropinone derivatives. Substantially, we tried several experiments to optimize reaction condition. The tropane spirohydantoins 17, 18, 19, 20, 21 were respectively synthesized by the treatment of corresponding N-substituted nortropinone with potassium cyanide and ammonium carbonate.

Castleman 씨 병에 동반된 신유전분증

김연수,한진석,이정상,김병국,이중건,정윤철,이진학,최영진,안규리,김성권,이현순 대한내과학회 1994 대한내과학회지 Vol.46 No.2

Castlemam's disease is an asymptomatic and benign lymph node hyperplasia which is frequently manifested as mediastinal mass in over 70% of cases. Amyloidosis is rarely associated with Castleman's disease. Recently we experienced a patient with nephrotic syndrome due to renal amyloidosis who had been previously diagnosed as Castleman's disease of retroperitoneal lymph node enlargement. A 47-year old woman was admitted because of generalized edema and chest tightness. Five months ago she diagnosed as Castlman's disease-plasma cell type, of retroperitoneal lymph node enlargement. The patient was followed up through outpatient department without any specific medication. Physical examination showed pale conjunctivae, palpable mass on epigastric area and pretibial pitting edema. The hemoglobin, leukocyte count and erythrocyte sedimentation rate were 96 g/L, 5.9×109/L and 127 mm/hour, respectively. The blood urea nitogen was 3.6 mmol/L and creatinine was 88 umol/L. The urinalysis showed 3 positive for albumin. Twentyfour hour urine contained 16.6 grams of protein. A computerized tomographic (CT) scan of the abdomen disclosed multiple lymph node enlargement at mesentery. Percutaneous needle biopsy of kidney showed massive infiltration of pale pinkish amorphous material in the glomerular tuft forming large nodules. Ultrastructural examination exhibited heavy deposition of amyloid fibrils in the mesangium and perpendicular to glomerular basement membrane. Polarizing microscopy with Congo-red stain revealed prominent yellow green birefringence in glomeruli, tubules and interstitium.

2차원 방사선준위 분포측정 시스템의 제작 및 특성 조사

김성환,강희동,한상효,김계령,최영수,이용범,이종민 한국센서학회 1997 센서학회지 Vol.6 No.4

In this study, the radiation monitoring system using CsI(TI) scintillation counter is developed for the measurement of radiation distribution in the field of high dose level. When the inner diameter of collimator is 8 mm, we have realized the optimum detecting efficiency and spatial resolution. At that time, the position resolution was 10 cm at 1 m from the system. And experimental results indicated that the energy resolution of the system were 10 % for 662 keV of Cs-137, 7.6 % for 1.17 MeV of Co-60, and 5.8 % for 1.33 MeV of Co-60. Also, we have shown that the real radiation distribution images may be obtained by our measurement system.

당뇨성망막증에서의 방사성핵종 망막신티그라피의 이용에 관한 연구

이상우,박영태,이형호,최승환,안일민,서순규,진용한,이태수 대한당뇨병학회 1985 Diabetes and Metabolism Journal Vol.9 No.1

당뇨병유발백서에서 급성패혈증 병발시 적혈구막지질과산화의 변화

박성우,홍성관,유형준,장대영,강승식,유재명,임성희,최문기,노정우,이규만 대한당뇨병학회 1994 Diabetes and Metabolism Journal Vol.18 No.3