다결정 실리콘의 화학증착에 대한 연구

蘇明基 江原大學校 産業科學硏究所 1982 産業技術硏究 Vol.2 No.-

Polycrystalline silicon layers have been deposited by a chemical vapor deposition technique using SiCl₄, H₂gas mixture on single crystal silicon substrates. In this work, the effects of depostion temperature and total flow rate on the deposition rate of polycrystalline silicon are investigated. From the experimental results it was found that the formation reaction of polycrystalline silicon was limited by surface reaction and mass transfer controlled as the deposition temperature was increased. The morphology of polycrystalline silicon layer changed from a fine structure to a coarse one as the deposition temperature was increased.

기초간호자연과학의 병태생리학, 병원미생물, 약물의 기전과 효과 내용별 필요도에 대한 연구

최명애,변영순,서영숙,황애란,김희승,홍해숙,박미정,최스미,이경숙,서화숙,신기수 대한기초간호자연과학회 2000 Journal of korean biological nursing science Vol.2 No.1

The purpose of this study was to define the content of the requisite knowledge of pathophysiology, clinical microbiology, and mechanisms and effects of drugs needed for clinical knowledge for nursing practice. Contents of knowledge on pathological physiology, clinical microbiology, and mechanisms and effects of drugs were constructed from syllabus of basic nursing subjects in 4 colleges of nursing, and textbooks. The degree of need of 72 items was measured with a 4 point scale. The subjects of this study were college-graduated 136 nurses from seven university hospitals in Seoul and three in Chonnam Province, Kyungbook Province, and Inchon. They have been working at internal medicine ward, surgical ward, intensive care unit, obstetrics and gynecology ward, pediatrics ward, opthalmology ward, ear, nose, and throat ward, emergency room, rehabilitation ward, cancer ward, and hospice ward. The results were as follows : 1. The highest scored items of the knowledge of pathophysiology, clinical microbiology, and mechanisms and effects of drugs necessary for nursing practice were side effects of drugs, anticoagulants, mechanisms of drugs, antihypertensive drugs, tolerance and addiction of drugs, interactions among drugs, hospital infection in the order of importance. The lowest scored item was structure of microrganisms. 2. The highest order of need according to unit was repair in tissue injury unit, definition·etiology·classification of inflammation in inflammation unit, trasplantation and immunologic response in alterations in immunity unit, thrombus and thrombosis in disorders of cardiovascular function unit, gene disorders in genetic disorders unit, hospital infection in infection unit, virus in microrganisms unit, side reactions of drugs in introduction unit, anticonvulsants in drugs for central nervous system unit, local anesthesia in anesthesia unit, anticoagulants in drugs for cardiovascular system unit, anti-inflammatory drugs in antibiotics unit, anti-ulcer drugs in drugs for digestive system unit, and bronchodilators in drugs for respiratory system unit. 3. The common content of the knowledge of pathophysiology, clinical microbiology, and mechanisms and effects of drugs needed for all clinical areas in nursing were side effects of drugs, anticoagulants, interactions among drugs, and hospital infection. However, the degree of need of each pathological physiology, clinical microbiology, and mechanisms and effects of drugs was different depending on clinical areas. 4. Significant differences in the knowledge of pathophysiology, clinical microbiology, and mechanisms and effects of drugs necessary for nursing practice such as tissue changes due to injurious stimuli, degenerative changes of tissue, alterations in metabolism of carbohydrates, ischemia, hyperemia and congestion, hospital infection, structure of microorganism, classification of microorganism, bacteria, virus, antidepressants, antipsychotic drugs, antiemetic drugs, antiparkinsonism drugs, antianxiety drugs, antibiotics, tuberculostatics, antiviral drugs, antifungal drugs, parasiticides, antiulcer drugs, antidiarrheais, and anti constipation drugs were shown according to the work area. 5. Significant differences in the knowledge of pathophysiology, clinical microbiology, and mechanisms and effects of drugs necessary for nursing practice such as transplantation and immunologic response, alterations in the metabolism of uric acid, structure of microorganism, classification of microorganism, immunosuppresants, drugs for congestive heart failure were demonstrated according to the duration of work. Based on these findings, all the 72 items constructed by Korean Academic Society of Basic Nursing Science should be included as contents of the knowledge of pathophysiology, clinical microbiology. and mechanisms and effects of drugs

SiC의 화학증착에 대한 열역학적 평형농도계산

蘇明基 江原大學校 産業技術硏究所 1985 産業技術硏究 Vol.5 No.-

Thermodynamic calculation for the CVD of SiC from methyltrichlorosilane(MTS) was done in some range of deposition condition to identify optimum condition. The results show that the most considerable chemical species are chloride and chlorosilane for silican source and methane and acetylene for carbon source. In order to yield single pahse β-SiC it is believed that optimum temperature range is between 1500 and 1700˚k. With increasing temperature, stable phase is changed from Si+SiC phase to C+SiC phase. It is believed because equilibrium concentration of silicon source decrease and equilibrium concentration of carbon source increases with increasing temperature.

주기적인 운동이 뒷다리 부유에 의해 유발된 쥐의 뒷다리근 위축경감에 미치는 영향

최명애,신기수 대한기초간호자연과학회 1999 Journal of korean biological nursing science Vol.1 No.1

The purpose of this study was to determine the effect of periodic low-intensity exercise during hindlimb suspension on the mass, relative weight, myofibrillar protein content in soleus, plantaris and gastrocnemius muscles. To examine the effectiveness of periodic low-intensity exercise on mass, and myofibrillar protein content of hindlimb muscles, adult female Wistar rats were suspended(HS) and half of these rats walked on a treadmill for 45min/day(15 min every 4h) at 5m/min and a 15˚ grade(HS-EX). Soleus wet weight was 33.51% significantly smaller(p<0.005) and relative soleus weight of hindlimb suspended rats was 31.96% smaller(p<0.005) compared with those of control rats following seven days of hindlimb suspension. Plantaris wet weight was 7.5% smaller(p<0.01) and relative plantaris weight was 11.83% smaller(p<0.05) compared with those of control rats following seven days of hindlimb suspension. Gastrocnemius wet weight was 11.31% significantly smaller(p<0.005) and relative gastrocnemius weight was 17.13% significantly smaller(p<0.005) compared with those of control rats following seven days of hindlimb suspension. Soleus wet weight while increased by relative soleus weight increased by 25.13%, 27.59% each through periodic low intensity exercise during hindlimb suspension(p<0.05, p<0.05). Plantaris wet weight and relative plantaris weight increased by 1.04%, 10.98%(p<0.05) each, and gastrocnemius wet weight and relative gastrocnemius weight increased by 1.98%, 12.02%(p<0.05) each through periodic low intensity exercise during hindlimb suspension. Wet weight of soleus, plantaris and gastrocnemius in HS-EX rats did not recover to control level. Myofibrillar protein content of soleus, plantaris and gastrocnemius was 48.24%, 40.85% and 37.33% significantly smaller(p<0.005) respectively compared with those of control rats following seven days of hindlimb suspension. Myofibrillar protein content of soleus, plantaris and gastrocnemius increased by 40.68%, 25.07% and 17.93%(p<0.005) each through periodic low intensity exercise during hindlimb suspension. Myofibrillar protein content of soleus, plantaris, and gastrocnemius in HS-EX rats did not recover to control level. The results suggest that periodic low intensity exercise can attenuate hindlimb muscle atrophy induced by hindlimb suspension.

스테로이드 치료 후 회복기의 규칙적인 운동이 쥐의 스테로이드 유발성 위축 뒷다리근에 미치는 영향

최명애,변영순,황애란,김희승,홍해숙,최스미,서화숙,이경숙,박미정,신기수,안경주,이윤경,임지회 대한기초간호자연과학회 2002 Journal of korean biological nursing science Vol.4 No.1

This study was conducted to determine whether low intensity regular exercise following steroid treatment could attenuate steroid-induced muscle atrophy. Thirty-eight Sprague-Dawley rats weighing 165~175g were divided into six groups;control group(C), dexamethasone administration group(D), sedentary after normal saline administration group(C+Se), exercise after normal saline administration group(C+Ex), sedentary group after dexamethasone administration(D+Se), exercise group after dexamethasone administration(D+Ex). Either dexamethasone(5mg/kg) or normal saline was injected for 7days accordingly. Exercise was started at 10m/min on the 10?grade treadmill and gradually increased up to 15m/min by the 7th day for 60minutes/day(20min×3). The data were analyzed by Kruskal-Wallis test and Mann-Whitney U test using the SPSS WIN 9.0 program. Body weight, muscle weight and myofibrillar protein content of both plantaris and gastrocnemius, Type I, II muscle fiber cross-sectional area of plantaris, and Type II muscle fiber cross-sectional area of gastrocnemis in D group were significantly lower than those of C group(p<.05) respectively. Hindlimb muscle weight, myofibrillar protein content of both plantaris and gastrocnemius, Type I muscle fiber cross-sectional area of soleus and Type I, II muscle fiber cross-sectional area of plantaris in D+Ex group tended to increase compared to those of D+Se group. Myofibrillar protein content of both plantaris and gastrocnemius, Type I muscle fiber cross-sectional area of plantaris in D+Ex group tended to increase compared to those of C+Se group. Based on these results, it is suggested that regular low-intensity exercise during recovery period after steroid treatment might facilitate the recovery from steroid-induced muscle atrophy.

SiC증착물의 형상에 미치는 과포화도의 영향

蘇明基 江原大學校 産業技術硏究所 1986 産業技術硏究 Vol.6 No.-

The effect of supersaturation on morphology of silicon carbide by chemical vapor deposition using CH3SiCl3-H2 gas mixture system was investigated. The experimental results show that the final structure of silicon carbide deposits is coaresr as total pressure increases or α-ratio decreases. It is believed because supersataration of Si-source decreases as total pressure increases or α-ratio decreases.

Dexamethasone 치료기간 중의 DHEA 투여가 쥐의 뒷다리근 질량에 미치는 영향

최명애,신기수,이은주,안경주 대한기초간호자연과학회 2001 Journal of korean biological nursing science Vol.3 No.1

The purpose of this study was to determine the effect of DHEA with dexamethasone on body weight and wet weight and relative weight of atrophied hindlimb muscles induced by dexamethasone treatment. 200~225g Wistar rats were divided into control(C), dexamethasone(D), dexamethasone and DHEA(DDH) groups. Dexamethasone was injected daily at a dose of 5mg/kg. DHEA was administered daily at a dose of 5mg/kg by oral ingestion during 7days. The data were analyzed by Kruskal-Wallis test and Mann-Whitney U test using the SPSSWIN 9.0 program. Body weight and muscle weight of plantaris and gastrocnemius of dexamethasone group decreased significantly compared with that of control group. Muscle weight of plantaris of DDH group increased significantly compared with dexamethasone group. Body weight of DDH group decreased significantly compared to control group, but relative weight of plantaris and gastrocnemius of DDH group increased significantly compared to control group. Based on these results, it can be suggested that DHEA administration during dexamethasone treatment can increase weight of atrophied plantaris muscle induced by dexamethasone treatment.

RTMOCVD법에 의해 제조된 Ta₂O(5) 박막의 특성

소명기,Kwong, D.L 江原大學校 産業技術硏究所 1999 産業技術硏究 Vol.19 No.-

Ultra thin Ta₂O5 gate dielectrics were prepared by RTMOCVD (rapid thermal metal organic chemical vapor deposition) using Ta source TaC12H30O5N and O₂ gaseous mixtures. As a result, Ta₂O5 thin films showed significantly low leakage current compared to SiO₂ of identical thickness, which was due to the stabilization of the interfacial layer by NO (SiOxNy) passivation layer. The conduction of leakage current in Ta₂O5 thin films was described by the hopping mechanism of Poole-Frenkel (PF) type.

鐵鋼 및 알루미늄材料의 機械的 性質에 미치는 TMT(thermomechanical treatment)의 影響

蘇明基 江原大學校 産業科學硏究所 1981 産業技術硏究 Vol.1 No.-

A study has been performed on the effect of TMT(thermomechanical treatment) on the mechanical properties of steel and aluminum alloys. Improvement of the mechanical properties on steel by HTMT is due to refinement of prior austenite grain size, martensite lath size and the distribution of ine carbide precipitates and on aluminum alloy by ITMT is due to grain size refinement, homogeneous distribution of small second phase particles and retardation of the recrystallization.

MOCVD를 이용한 GaAs 박막의 에피성장

소명기 江原大學校 産業技術硏究所 2004 産業技術硏究 Vol.24 No.B

GaAs thin films were grown epitaxially by MOCVD method on (001) GaAs substrate. And as a surfactant, Bi(bismuth) thin films were deposited on GaAs buffer layer by using TMBi(trimethylbismuth) source. In-situ reflectance difference spectroscopy(RDS) was used to monitor the surface reconstruction of GaAs and Bi thin films. As the results, under the exposure of TBAs(tertiarybuthylarsine) and hydrogen atmosphere, the surface reconstruction of GaAs was changed from As-rich c(4x4) to As-rich (2x4), which was due to the adsoption and desorption of As dimers. The first bismuth surface related RDS signal was reported. At the deposition temperature of 450℃, Bi-terminated GaAs surface showed the RDS spectrum similar to that of Sb-terminated GaAs surface, possibly a (2x4) surface. And Bi surface layers were rapidly evaporated with increasing the deposition temperature(550℃), finally becoming As-terminated (2x4) surface.