염화아세트산들의 해리반응에 미치는 온도와 압력의 영향

황정의,정종재,박용태,지종기,박의환 慶北大學校 1982 論文集 Vol.33 No.-

The temperature and pressure dependences of the dissociation constants of mono-, di- and tri-chloroacetic acids were studied by the conductimetry in the range of 20-35℃ and 1-2500 bars. The thermodynamic parameters ΔH, ΔS, and ΔV were evaluated from the dissociation constants. The dissociation constants were increased as the temperature and pressure was increased respectively. The pressure effects can be explained by the fact that the increase of the charges of reaction species enhances the solvation of ions and reduces the reaction volume. As the more chlorines were substituted to acetic acid, the effect of pressure on the dissociation constants was decreased because of the enhanced solvation effect. From the thermodynamic data it can be estimated that there are two types of dissociation reactions. They are an enthalpy-dominated reaction and an entropy-dominated one.

결핵균체 추출액으로부터 알파 및 베타단백항원의 정제에 관한 연구

황인택,백태현,김화중,박정규,최대경 충남대학교 의과대학 지역사회의학연구소 1990 충남의대잡지 Vol.17 No.1

It is well known that α- and β-antigens are major protein products of Mycobacterium tuberculosis. Alpha and beta antigens from the cell extract of Mycobacterium tuberculosis were purified by 80% ammonium sulfate precipitation, gel filtration of Sephacryl S-300, DEAE-Sephacel ion exchange chromatography and hydroxylapatite chromatography. Beta antigen was purified further by column preparative polyacrylamide gel electrophoresis. The purified alpha and beta antigens were checked degree of purified by SDS-polyacrylamide gel electrophoresis. The results were summarized as follows: 1. Alpha antigen was purified by ammonium sulfate precipitation, gel filtration, ion exchange chromatography and hydroxylapatite chromatography. The purified alpha antigen showed a distinct band of 30 KDa molecule on SDS-polyacrylamide gel electrophresis. 2. Beta antigen was purified by ammonium sulfate precipitation, gel filtration, ion-exchange chromatography, hydroxylapatite chromatography and column preparative polyacrylamide gel electophoresis. The purified beta antigen showed two distinct bands of 83 KDa and 52 KDa molecules on SDS-PAGE. 3. Especially, Beta antigen was absorbed well to hydroxylapatite column but alpha antigen was passed completely without absorption.

Trigger point를 利用한 口眼괘斜 患者 10例에 대한 臨床的 考察

鄭榮敦,李浚龜,金永一,朴泰均,辛泳一,黃載然,李賢,李秉烈 대전대학교 한의학연구소 2002 한의학연구소 논문집 Vol.10 No.2

From July 1th 2001 to October 31th 2001, the Clinical investigation studies were carried out 10 cases of patient with Bell's palsy using Trigger point treatment group, who had been treated in Han-seung Oriental Medical Clinic. The results were like below : 1. The distribution of sex : Male were 4cases, female were 6case and the female to male ratio was 1.5 : 1. 2. The distribution of contributing factor : Unknown reason was most predominant 4 cases, and then were revealed to labor too hard, menttal stress(3 cases), trauma·common cold(1 case) in turn. 3. The distribution of perid to fall ill : Under a week was the most number 6cases, and then were revealed a week under two weeks(3 cases), over two weeks(1 case) in turn. 4. About period of treatment : The Trigger point treatment group is shorter than the Acupuncture treatment group. 5. The distribution of grade on admission in descending order : GrⅠ was the most number and then GrⅡ, GrⅢ in turn. 6. The distribution of clinical symptoms on adimission : Mastoid pain was the most number 9 cases and then lacrimal gland disorder 8 cases, dysgeusia 4 cases, hyperacusis 2 cases, the others 2 cases in turn. 7. About effect of treatment : The Trigger point treatment group is more excellent than the Acupuncture treatment group. 8. The more patient age is young, the more effect of treatment was excellent, had nothing to do with both groups. 9. The more perid to fall ill is short, the more effect of treatment was excellent, had nothing to do with both groups. 10. About period of improved frontal belly : The Trigger point treatment group is more excellent than the Acupuncture treatment group.

고속가공을 위한 검사시편에 관한 연구

정종윤,황영수,이춘만,정원지,고태조 한국공작기계학회 2003 한국생산제조학회지 Vol.12 No.4

The properties of a machine tool greatly affect machining quality since a machine tool has large variance in its features. Machine tool makers want to find best machining condition with the one that they have built. Machine builders need to develop test specimen since it helps finding characteristics of machine tools when the machining properties of the specimen are analyzed. This paper develops test specimen to identify features of the main spindle, the feeding device, and the frame of a machine tool. The specimen is machined with a high speed machine and the features of the machine are analyzed with test items. They are surface roughness, overshoot in axial movement, errors in circular movement, feeding with small movement, and compensational error. This work can improve usability for a machine tool in machining practice.

염화아세트산들의 해리반응에 미치는 온도와 압력의 영향

황정의,정종재,박용태,지종기,박의환 慶北大學校 物理化學硏究所 1984 硏究論文集 Vol.5 No.-

The temperature and pressure dependences of the dissociation constants of mono-, di- and tri-chloroacetic acids were studied by the conductimetry in the range of 20-35℃ and 1-2500 bars. The thermodynamic parameters ΔH, ΔS, and ΔV were evaluated from the dissociation constants. The dissociation constants were increased as the temperature and pressure was increased respectively. The pressure effects can be explained by the fact that the increase of the charges of reaction species enhances the solvation of ions and reduces the reaction volume. As the more chlorines were substituted to acetic acid, the effect of pressure on the dissociation constants was decreased because of the enhanced solvation effect. From the thermodynamic data it can be estimated that there are two types of dissociation reactions. They are an enthalpy-dominated reaction and an entropy-dominated one.

임대아파트 장기수선 대체안 검토를 위한 CAFM 시스템 개발

정영한,박태근,김광우,김창덕,김옥규,황영삼,박홍석 대한건축학회 2004 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.24 No.1

In the case of rental apartment. the special Quality continuously preservation administration business consist and saves up Long-term Maintenance expense voluntarily. Because business surrounding that this can control preservation administration business whole is possible. administration of repair work is easy. Do system development that introduce technique for long-term strategy establishment in CAFM by purpose. Estimation of system to develop is as following: Can reduce time that take in LCC calculation because approach automatically to information of necessary facility in LCC calculation and know repair time as is easy. It is possible that execute selection of item that is examined in long-term maintenance plan as efficient and correct. Priority injection of budget by facility deteriorated degree is consisted preferentially using FCI.

국내 하천 퇴적물 건강성평가를 위한 Microtox 독성시험 조건확립 연구

정홍배,박정규,문성환,류태권,김소정,배철한,황인영 한국환경독성학회 2001 환경독성보건학회지 Vol.16 No.4

1. 하천 퇴적물 공극수, 증류수 추출용액 및 유기용매 추출액을 pH6.0~6.5 범위로 조절한 후 Microtox 독성을 측정하는 것이 퇴적물내의 암모니아 독성이 배제된, 유해화학물질 오염에 의한 퇴적물 독성을 평가하는 방안임을 확인하였다. 2. 퇴적물에 대해 공극수, 증류수 추출물, 유기용매 추출물 구분하여 Microtox 독성을 구하는 것이 퇴적물 내 유해화학물질의 독성발현 특성을 예측할 수 있는 기법이라고 사료된다. 3. 조사정점 내 시료 채취 지점간 독성에 편차로 인하여, 동일 정점의 반경 50~100m 내에서 최소 4지점 이상의 퇴적물을 확보하는 것이 해당 정점의 독성 대표값을 산출할 수 있는 방안이 된다고 판단된다. 4. 한강수계인 남한강 지천인 복하천과 양화천, 금강수계인 청주 미호천, 대전 갑천, 낙동강수계인 대구 금호강, 영산강수계인 황룡강 그리고 익산 만경강을 대상으로 한 예비 조사한 결과, 집중연구대상 하천으로의 조건은 금호강이 가장 우수하였다. 5. 하천 퇴적물의 증류수 추출액과 유기용매 추출액의 Microtox 독성값 간의 상호 상관성이 높았다. 그러나, 농축 과정이 용이하므로 정점간 비교를 위한 독성 측정시 유기용매 추출액을 사용하는 것이 바람직하다고 사료되었다. Six rivers were selected as preliminary screening sites to determine the test conditions of Microtox in assessing the toxicity of the sediment. In addition, a pH range of 6.0--6.5 was established in testing pore water, aqueous extracts and organic extracts. Each extractable fraction of sediment showed different toxicities. Therefore, in order to properly examine the toxicity in the sediment, all extractable fractions of sediment samples needed to be tested with Microtox. Thus, sediment samples were additionally collected from at least 4 secondary sites within 50~100 m area of the primary sampling site to reduce any variation or deviation in toxicity assessment. From all sediment toxicity data that was collected from this study, it was concluded that the Keumho river was the most polluted with the highest sediment toxicity of all the rivers analyzed and needed further detailed research on its pollution problem.

가솔린기관의 운전조건에 따른 배출가스 특성에 관한 硏究

黃光性,鄭鳳守,金泰圭 진주산업대학교 2000 산업과학기술연구소보 Vol.- No.7

The amount of carbon of dioxide, carbon hydroxide and nitrogen oxides produced from gasoline engine were detected by adjusting throttle valve and engine speed and increasing intaking temperature for combustion, and the results were as follows 1. The amount of CO produced decreased by intaking temperature of air increase where as it increased by increasing engine speed and closing the throttle valve. 2. The amount of HC produced decreased by increasing the intaking air, enlarging the throttle and by increasing the engine speed, but it increased carbon hydroxides more than 2400rpm at 120℃ 3. The amount of NOx produced maximized when throttle open 120˚ and speed reached 2200rpm and increased it by increasing temperature of outer air.

임대아파트 유지관리를 위한 성장형 데이터베이스 모델에 관한 연구

정영한,박태근,김광우,김창덕,김옥규,황영삼,박홍석 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2

In making social sympathy about the drafting of a mid-long term of maintenance plan and the development of building maintenance database for technique support, the target of this study is rental apartments admitting a variety of objects to data model in maintenance. For the development of database in maintenance, it shows that the database model is possible for the references of AS-IS modeling and function model and continuous work analysis by function and process analysis. Also, the structure of model at this study will be applied in maintenance as well as construction needed the development of database. To get continuous growth in maintenance information, it has been necessary to take a standard of information in plan, design, construction, and management. After this, it would be required to develop the South Korea-type FMS(Facilities Management Classes) based on IFC(Industry Foundation Classes)

만성정신질환자의 직업재활 사례

황태연,한은선,이영문,강순정,정경선 용인정신의학연구소 1995 용인정신의학보 Vol.2 No.1