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전우정,신화우,최광식,안세민,이광표,장영수 원광대학교 식품약품안전성연구소 1993 食品藥品安全性硏究 Vol.6 No.-
Magesium twisilicate is mainly uaed as a nonsytemic antacid andabsrbent. Magnesium trisilicate when teeated with anacid sxuh as diluted hydrochloric acid in gastric juice decomposes to form Magnesium chloride and colloidal Silicates. 2MgO·3SiO_2 + 4Hcl - 2MgCl_2 + H_4Si_3O_8 (or 3SiO_2 + 2H_2O) Colloidal mixture The resultng colloidal silicates can protect ahe ulcer frdm further acid and peptic attack and possibly adsorb the pepsin. It is well known that yield of Magnesium trisilcate produced is greatly affected by the Synthesis condition such as the reactant concentration, reaction temperature and moleatio of reactant solutions as well as by the emperature at which the precipitate is dried and the temperature of washing water, etc. The purpose of this study is to investigate the optimum synthesis conditions of Magnesium trisilicate. A randomized complete block design suggested by G.E.P. Bdx and K.B. Wagnesium sulfate solution with Sodium silicate solution in this study. It was found that optimal synthesis conditidns were: Reaction temperature range : 57-90 ℃. Concentration range of reactants (Sodium silicate and Magnesium sulfate) : 19.1-29% molar ratio of the reactants. [Sodium silicate]/[Magnesium sulfate]: 1.47-1.80. temperature range of washing water: 45-48℃ and drying temperature range: 65-82℃ The antacidic activity of five Magnesium trisilicate samples which shows the maximum antacidic efficacy was tested by pharmacopeia acid consuming capacity test. The five Magnesium trisilicate samples were samples were identified by chemical analysis.
田光鉉 全北大學校 語學硏究所 1977 어학 Vol.4 No.-
지금까지 극히 소루하게 다루어온 익산지역어의 일반적인 성격과 몇 가지 특징을 간추려 종합 기술하는 것으로 결론에 대신하고자 한다. 1. 익산지역은 충청남도와 접경을 이루고 있어 접촉방언의 성격을 가지며 충남의 논산, 서천과는 언어외적 요소를 감안할 때 접촉지역으로서의 특성을 가진다. 다만 동남방언권과 서남방언권이 갖는 접촉방언에 비하면 그 특징이 명확하지 않다. 2. 구개음화현상중 /t/, /n/, /I/, /h/, /s/계 구개음화는 거의 구개음화 실현지역의 그것과 대동소이하지만 한 가지 특징적인 것은(이 점도 남부방언권에 나타나는 공통적 사실이겠지만) /k/계 구개음화이다. 이 구개음화의 제약 조건 중 특이한 것은 Umlaut현상과의 유관성이다. 즉 제2음절이하에서 선행음절의 모음이 전부모음이거나 전부모음화 할 가능성이 있을 때는 /k/구개음화는 제약을 받는다. 그리고 이 지역에서 나타나는 구개음화의 제약조건은 중부에 비해 축소 약화된 양상을 보인다. 이는 곧 음운변화에 대한 제약으로부터의 부분적 탈피가능성을 의미한다.
전광현 한국영유아보육학회 2003 한국영유아보육학 Vol.0 No.34
This article examines current child welfare policies paying special attention to the policy statement, For the Activation of child care service, that proposed the liberalization of the fee for child care service in Korea. This article describes current laws that address financing for the Korean child care services and leads insights to further development of the child care system. Addressing the statement published in July, 2002, supported by Ministry of Health and Welfare, Ministry of Gender Equality, and Ministry of Labor, the author argues as follows for the effective implementation of child care services. 1) It needs to be clarify that the responsibility of providing child care services relies upon the state not upon the individual. 2) In the process of the liberalization of the fee for child care service based on the philosophy of market economy, the most needy may not receive the most services. 3) Employing child care policy based on market economy, the consumer may be ill advised to choose the child care services due to the lack of proper informations and evaluations available. It is necessarily required for the successful delivery of child care services that the government ensure to provide support system that protect the most disadvantaged.
전기천,강시환,박광순,김상익 경남대학교 환경문제연구소 1990 환경연구 Vol.12 No.-
최근 한반도를 통과했던 태풍 중 그 규모가 커서 海上에서 발생된 颱風波浪에 의해 특히 남해안 지역에 큰 재해를 준 1986년 태풍 Vera(8613)호 통과시에 南海의 거문도와 거제도 海上에서 동시에 태풍파랑을 관측하였다. 관측된 태풍파랑의 재현을 위하여 유럽의 북해를 대상으로 최근 연구개발된 Hybrid Parametric Wave Model(HYPA)을 적용하여 Vera 통과시의 파랑분포를 수치적으로 계산하였으며, 그 계산결과를 관측치와 비교하였다. 또한 태풍파랑의 추정에 주로 사용되어온 Wilson모델의 결과와도 비교하여으며, HYPA모델의 결과가 Wilson모델에 비해 훨씬 관측된 파랑자료에 근접함을 보였다. 따라서 본 연구를 통해서 한반도 근해상에서 발생되는 태풍파랑의 예측과 추정에 있어 HYPA모델에 매우 정확함을 보여주었다. During the passage of Typhoon Vera(8613) which causes the heavy natural disasters, especially, on the southern coast of Korea, waves were simultaneously measured at two different locations of the South Sea, that is, near to the Geomun and the Geoje Islands. In order to reproduce the measured typhoen-waves, Hybrid Parameteric Wave Model(HYPA) which has been developed for the North Sea was adopted to calculate numerically the waves generated by the Typhoon Vera. The model results were jilter-compared with the measured waves, and also with the results of Wilson model which has been widely used for the hindcast of typhoon-waves. HYPA's results show in the closer ageement with the measured waves than those of Wilson's. Based on these comparisons, HYPA model can be used for more accurate forecast and hindcast of typhoon-waves in Korean Seas.
FDM에서 Build Orientation이 쾌속조형물의 표면에 미치는 영향
전재억,서진호,권광진,권혁준,정진서,하만경 한국공작기계학회 2002 한국공작기계학회 춘계학술대회논문집 Vol.2002 No.-
Fused deposition (FD) modeling by Stratasys Inc., is one of the material deposition subfamilies of solid freeform fabrication (SFF) technologies. In this process, build material in the form of a flexible filament, is heated to a semi-liquid state and extruded from a controlled deposition head onto a fixtureless table in a temperature controlled environment. The position of nozzle is computer controlled relative to the base, which allows geometric complex models to be made to precise dimensions. FDM provide what the part was directly tested by the worker. It provide believable data. This Study is identify to surface roughness by build orientation adjustment. So, the paper is the study on surface roughness by build orientation at FDM.
Ethylenediamine-N,N'-di-α-Butyric Acid의 로디움(Ⅲ) 착물
전무진,한창윤,박장우,최승락,박광하 연세대학교 자연과학연구소 1985 學術論文集 Vol.15 No.-
네자리 리간드인 ethylenediamine--N,N'-di-α-butyric acid(eddb)의 디클로로 로디움(Ⅲ)착물을 합성하고 크로마토그래피법으로 분리하였다. Eddb리간드가 로디움(Ⅲ) 이온에 배위될 때 s-cis와 uns-cis기하 이성체가 형성됨이 관찰되었다. 합성된 착물의 구조는 적외선 분광분석법, 핵자기 공명 및 흡수 스펙트럼으로 확인되었다. Dichloro rhodium(Ⅲ) complex of a flexible tetradentate ligand of ethylenediamine-N,N'-di-α-butyric acid(eddb) has been prepared and separated by the chromatographic method. S-cis and uns-cis geometric isomers have been yielded during the preparation of complex. IR, PMR and electronic absorption spectra have been used to characterize the complex.
전태연,배치운,김영호,장계호,이정태,박원명,김광수 대한신경정신의학회 2000 신경정신의학 Vol.39 No.6
연구목적 : 주요 우울증은 역학적 유전연구 등을 통하여 유전적 영향이 높은 것으로 알려져 있으며 최근에는 분자 유전학적 연구로 유전자 다형성과 질병의 연관성을 밝히는 것이 정신질환의 유전학적 연구에서 중요한 부분을 차지하고 있다. 이에 본 연구는 중추신경계와 면역계간의 상호작용에 관여하는 싸이토카인 중 TNF-β 유전자의 다형성을 분석하여 주요 우울증과의 유전학적 관련성을 알아보고자 하였다. 방 법 : DSM-IV에 의하여 주요 우울증으로 진단된95명을 환자군으로 선정하였고 가톨릭조혈모세포정보은행에서 보유하고 있는 정상 한국인 202명의 자료를 정상 대조군으로 사용하였다. 전혈에서 DNA를 추출하고 TNF-β 유전자 부위를 증폭한 후 제한효소 Nco Ⅰ으로 절단하여 555bp와 185bp의 절편을 갖는 TNFB*1과 Nco Ⅰ절단부가 없는 740bp의 절편 TNFB*2등 2가지 대립유전자의 제한효소절편길이 다형성을 조사하였다. 모든 자료의 분석은 x²검증을 이용하였다. 결 과 : 1) 주요 우울증과 정상 대조군 간에 TNFB유전자인 TNFB*1/1, TNFB*1/2 및 TNFB*2/2의 발현 빈도에는 유의한 차이가 없었다. 2) 두 군 간에 TNFB*1 과 TNFB*2 두 대립유전자의 빈도에는 유의한 차이가 없었다. 결 론 : 본 연구에서는 주요 울울증군과 정상 대조군 간에 TNFB*1과 TNFB*2의 두 대립유전자 발현 빈도에 유의한 차이를 발견하지 못하였다. 따라서 TNFB 유전자다형성과 주요 우울증과의 유전학적인 연관성이 없었다. 향후 연구에서는 다양한 임상변인을 포함하여 보다 통합적이고 체계적인 연구가 이루어져야 할 것으로 생각되었다. Objective : Major depressive disorder is known to have high genetic predisposition and the main focus of recent genetic studies in major depressive disorder has been concentrated on association studies between genetic polymorphism and disease, since molecular genetic methods have been developed. This study was designed to investigate the relationship between major depressive disorder and immunogenetic influences by analyzing polymorphism of TNFB gene, which is involved in interaction of immune system and CNS. Method : 95 persons who had been diagnosed of major depressive disorder were assigned as patient group and, 202 data obtained from Catholic hemopoietic stem cell bank, College of medicine, the Catholic University of Korea, were used as normal controls in this study. DNA was extracted from whole blood, thereafter amplified by polymerase chain reaction, and digested by Nco Ⅰ.After that procedure, we obtained and assessd restriction fragment length polymorphism of two alleles, TNFV*1 which has 555bp and 185bp fragments and carries the Nco Ⅰ restriction site, and TNFB*2 of 740 bp fragment lacks the Nco Ⅰ restriction site. All data were analyzed by x²test with two-tailed Fisher's exact test. Results : 1) The frequencies of TNFB*1/1, TNFB*1/2, and TNFB*2/2 were not statistically different between major depressive disorder patients and control group. 2) The frequencies of TNFB*2 and TNFB*1 were not statistically different between major depressive disorder patient group and normal control group. Conclusion : We did not verified the differences of frequency in TNFB*1/TNFB*2 gene between the major depressive disorder and normal controls, respectively. Consequently, there is no genetic relationship between major depressive disorder and gene polymorphism of TNFB. We do suggest that further systematic studies including various clinical variables should be conducted.
FDM에서 경사면의 표면과 면적오차법의 관계에 대한 연구
전재억,정진서,황영모,김수광,김준안,계중읍,하만경 한국공작기계학회 2002 한국공작기계학회 추계학술대회논문집 Vol.2002 No.-
In any rapid prototyping process, the layer by layer building process introduces an area error between the staircase and the surface line specified by the computer-aided design model. This affects the dimensional accuracy as well as the surface finish for different part build orientations. This paper describes a methodology for computing the area error for any orientation of the part built by the fused deposition modelling system. This technique can be applied to determine the best build orientation of the part, based on the minimum area error. This technique is verified by comparing the results with the experimental measurements of the area error of the parts built at different orientations.