인구구조의 변화와 노인문제

김응렬 고려대학교 한국학연구소 2003 한국학연구 Vol.18 No.-

The purpose of this paper is to analyze change of age structure and aging problems. According to NSO(The National Statistical Office), South Korea has become ahing society. The population of the aged is increasing rapidly as a result of better living conditions and the advancement medical technology. Meanwhile, TFR(Total Fortile Rates) is decreasing rapidly as a result of change of social environment, such as women's high educational level achievement and participation in economic activities, late marriage in life and transformation of women's life style. Population Aged 65 and Over(in thousands) and TFR Selected Years. (본문참조) Compared with other developed countries, the numbers of the aged is not yet serious problem in South Korea. South Korea has a strong tradition of family support for the elderly but now this has weakened family support. The central and local government is tasked with preparing a social safety net.

Thixotropic 유동계에 대한 연구

김봉오,박윤형,김응렬 漢陽大學校 環境科學硏究所 1991 環境科學論文集 Vol.12 No.-

Thixotropy는 시간의존성 shear thinning 현상이다. 그리고 thixotropy 는 entanglement-disentanglement 전환으로 가정할 수 있다. 1986년에 sohn 등은 shear stress 에 기인한 구조변화의 개념을 Ree-Eyring plastic 유동에 적용하여 간단한 thixotropc 유동 방정식을 유도하였다. 이 유동 방정식을 amylose와 amylopectin 수용액 그리고 수용성 silica 분산계 및 latax paints계와 PMMA sol계에 적용하여 이 thixotropic 유동 방정식의 유용성을 논의하였다. Thixotropy is the time dependent shear thinning phenomenon. And it is possible to postulate that thixotropy is the entanglement-disentanglement transition. In 1986, by introducing the concept of structural change caused by the shear stress into the Ree-Eyrng's equation of plastic flow, the modified and simple thixotropic equation was derived by Sohn etc. This thixotropic equation was applied to amylose and amylopectin solutions, aqueous silica dispersions, latex paints and PMMA sol system. And its usability was discussed.

Langmuir-Blodgett분자막을 이용한 Poly-p(methyl)Phenylmethacrylate의 분자량 측정

김창남,김응렬,이해원 漢陽大學校 自然科學硏究所 1996 自然科學論文集 Vol.15 No.-

Langmuir-Blodgett 분자막을 이용하여 전자선 레지스트로써 가능성이 높은 (PMMA)의 유도체의 분자량을 측정하고자 하였다. polymethylmethacrylate (PMMA)에 phenyl기를 도입하여 그의 유도체 poly-p(methyl)phenylmethacrylate (PMMA)를 합성하여 그의 평균분자량 및 열안정성을 측정하였다. 합성한 고분자를 균일한 Langmuir분자막 상태로 만들어 측정한 표면압-면적 등온선 (Ⅱ-?? isotherm)에서 Ⅱ??값을 유도하여 고분자의 평균분자량을 구했으며, 이 값은 압축속도에 비례하며, 분자량이 작은 단분자막일수록 GPC로 측정한 분자량에 가까운 값을 보여주었다. We measured average molecular weight ?? of PMMA derivatives which can be used as electron beam resists for microlithography. Poly-p(methyl)phenylmethacrylate(PMPMA) was synthesized to increase thermal stability and physical property compared to polymethylmethacrylate and their weight average molecular weight ?? was determined by using both GPC and Langmuir film measurements. We calculate ?? of PMPMaA monolayer at air-water interface. On the basis of calculation, it is suggested that the ?? is proportional to the compression rate, and those values are very close to ?? values measured by GPC

재미한국노인의 의사소통망

김응렬 고려대학교 한국학연구소 2000 한국학연구 Vol.12 No.-

TMP의 감마 放射線分解에 있어서의 할로벤젠에 의한 Electron-scavenging에 關한 硏究

金應洌 漢陽大學校 環境科學硏究所 1983 環境科學論文集 Vol.4 No.-

TMP의 방사선분해에 의한 메탄과 수소생성을 electron-scavenger(halobenzene)의 거동으로 연구하였다. electron-scavenger는 메탄의 수율에 대해서는 미비한 효과였지만, 수소의 수율을 억제함을 알 수 있었다. Hummel의 실험식으로부터 얻은 실험적파라미터 α는 6.5ℓ/㏖였으며 ??+??의 값은 3.5를 얻었다. The formation of methane and hydrogen in the γ-radiolysis of TMP has been studied in the presence of an electron-scavenger(halobenzene). Electron-scavenger are found to depress the hydrogen yield and have only a slight effect on the methane yield. From Hummel empirical equation, empirical parameter(α) was obtain 6.5ℓ/㏖. The value of ??, ?? thus obtained are 3.5.

Stellite 6 합금의 열간 압연 특성

백응률,심종필,김판권 영남대학교 공업기술연구소 2001 工業技術硏究所論文集 Vol.29 No.1

The aim of the investigation was to study the effect of hot working on the tensile properties of the Stellite 6 alloy, normally used in the form of castings. To determine most suitable hot working temperature, firstly specimens were preheated so as to obtain maximum deformation without cracking, upsetting tests were preformed at temperatures ranging from 1150 to 1300℃ at intervals of 50℃. As the result, the deformation of 35% without cracking is possible at 1250℃. Both cast and hot worked specimens were investigated microstructure, composition of carbides, constituting phase and hardness of specimens by using SEM and tensile test was carried out in order to know tensile properties of specimens. As the result of observing Microstructure, hot workings breakdowns eutectic carbide network in the Stellite 6 alloy, and eutectic carbides are aligned in rolling direction. The result of the tensile test, hot worked specimen is much higher than the casting specimen in the tensile properties.

n-Hexane에서 Aniline, N,N-dimethylaniline, Pyridine과 Iodine간의 Complex 형성에 따른 열역학적 성질에 대한 연구

권오윤,김응렬 漢陽大學校 基礎科學硏究所 1988 基礎科學論文集 Vol.7 No.-

n-Hexane 중에서 aniline, N,N-dimethylaniline, pyridine과 iodine간의 charge transfer complex 형성에 따른 열역학적 성질을 constant activity method를 이용해서 조사하였다. 용액중 iodine, activity를 일정하게 유지하기 위하여 tetramethyl ammonium pentaiodide를 사용하였으며, 이들 complex에 대한 isosbestic point를 분광학적인 방법으로 측정한 결과 aniline, N,N-dimethylaniline 및 pyridine에 대하여 각각 495, 513.5, 478nm 이었다. 25℃에서 aniline, N,N-dimethylaniline 및 pyriod과 iodine각의 complex 형성에 대한 평형상수는 각각 3.1, 30.86, 118.91·??이었으며, 속도 상수는 ??,??,??로 나타났다. 그리고 열역학적 parameter, ΔG는 -0.672, -2.030, ?? 이며, ΔS는 각각 -24.7, -34.3, ??, ΔH는 8.02, 12.26, ??이었다. The thermodynamic properties of iodine complexes with aniline, N,N-dimethy laniline, pyridine in n-hexane were studied by constant activity method. To maintain constant iodine activity in solution, we made use of ??(tetramethylammonium-pentaiodide) Isosbestic points measured by spectroscopic method were aniline:495nm, N,N-dimethylaniline:513.5nm, pyridine:478nm, respectively. Spectroscopic measurement was done at these iosbestic spoint, and experimental results for each iodine complexes with aniline, N,N-dimethylaniline, pyridine are following; equilibrium constant:3.11, 30.86, ??, rate constant :??, ??, ??, and thermodynamic parameters, ΔG:-0.672, -2.030, ??, ΔS:-24.7, 34.3, ??, and ΔH:8.02, 12.26, ??.

사람 적혈구 막에 있어서 Carnitine acyltransferase 효소에 관한 연구

박중근,김응렬,조기승 漢陽大學校敎養學部 1976 硏究論文集 Vol.- No.1

사람 적혈구막에서 palmitoyl carnitine을 생성하는 효소계의 존재를 확인하였는데 이 효소계에 의해 palmitoyl coenzyme A와 DL-Carnitine(methyl-14C)으로부터 palmitoyl carnitine-14C이 생합성됨을 고찰하였고, 한편 이 효소계에 의해 화학적으로 합성한 palmitoyl-14C-carnitine이 palmitic acid-14C과 carnitine으로 가수분해됨을 확인하였다. 이 효소계에 의해서나 또는 화학적 방법에 의해 만들어진 palmitoyl carnitine은 적혈구막을 용해하며 이때 막에 부착된 효소계인 Adenosine Triphosphatase나 Glucose-6-phosphatase등이 활성화됨을 발견하였다. An enzyme system in human erythrocyte membrane was found to catalyze the formation of palmitoyl carnitine-14C from palmitoyl coenzyme A and carnitine-(methyl-14C). It was also confirmed that the same enzyme acts on the hydrolysis of palmitoyl-14C-carnitine into palmitic acid-14C and carnitine. Palmitoyl carnitine formed from this enzyme system or other chemical method solubilized the erythrocyte membrane and stimulated significantly the membrane bound enzymes, such as Adeno-sine Triphosphatase (ATPase) and Glucose-6-phosphatase (G-6-Pase) tried.

사람 혈청트란스페린 수용체의 정제와 그 특성에 관한 연구

이상진,김응국,김승렬 충북대학교 의과대학 충북대학교 의학연구소 1997 忠北醫大學術誌 Vol.7 No.1

사람 트란스페린 수용체는 90-kDa의 분자량을 가진 당단백질이 둘이 결합한 단백질로 두 분자의 트란스페린과 결합할 수 있다. 본 실험에서는 사람 태반과 혈청에서 트란스페린 수용체의 고순도 정제법을 보고한다. 사람 암세포주(K-562와 SNU-1)에서 결합상수를 구해보았으며, 정상세포(적혈구와 단핵구)와 비교하여 차이가 없음을 보고한다. Human transferrin receptor is a disulfide-linked homodimer of 90-kDa glycoprotein, capable of binding two transferrin molecules. The study reports a high yield affinity purification protocol for transferrin receptor from human placenta and serum which produces the highly purified protein. We have examined the binding of human transferrin to cultured human cancer cell lines(K-562, SNU-1). Results indicate the presence of a high affinity saturable binding site(Kd=2.5 × 10-8). However, the difference between the cell line receptors in the dissociation constant have not been observed.

Angle Resolved X-ray Photoelectron Spectroscopy와 유기황화합물 단분자막을 이용한 광전자의 평균 자유 행로 측정

이해원,김응렬,박찬근 漢陽大學校 基礎科學硏究所 1995 基礎科學論文集 Vol.14 No.-

X - ray photoelectron spectroscopy(XPS)를 유기 재료 표면의 정량분석이나 깊이 분포분석에 응용하기 위하여 유기 매질에서의 광전자의 평균 자유 행로를 구하고자 하였다. 이를 위하여 methylene(-CH₂-)기의 수가 각각 7, 11, 15개인 ??의 자기집합 단분자막(SA막)을 금표면에 형성하였다. 형성된 막은 reflection - absorption FTIR로 확인하였으며, angle - resolved XPS를 이용하여 평균 자유 행로를 구하고 alkanethiol SA막의 탄화수소계열에 대한 평균자 유행로의 표준으로서의 가능성을 살펴보았다. 또한, 이 과정에서 x - ray의 영향으로 SA막의 두께가 감소되는 것을 관찰 할 수 있었다. To apply x - ray photoelectron spectroscopy for surface analysis or depth profiling of organic material, there needs to know the attenuation length of photoelectron from organic matrix, For this purpose, ??(n=7, 11, and 15) monolayers by self - assembly(SA) were prepared on gold surface and identified by reflection - absorption(RA) FTIR. The attenuation length of photoelectrons from each SA monolayers has been estimated by angle resolved XPS and the possibility of using alkanethiol SA monolayers as standards for organic surface analysis has been studied. The decrease of the thickness of SA films by x - ray was observed.