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중년여성 고혈압 환자의 12주간 걷기운동이 Apolipoprotein B, Nitric Oxide에 미치는 영향
김찬회,차병관,이지숙 한국웰니스학회 2012 한국웰니스학회지 Vol.7 No.1
The aim of this study was to present basic data and information for an exercise therapy with a purpose to prevent and improve cardiovascular diseases by conducting a 12-week walking program with 14 female hypertensive patients in their 50's and analyzing its effects on body composition, blood pressure, Apo B and NO. The results of this study were processed using SPSS Ver 18.0 and two-way repeated ANOVA was performed in order to test the difference between each group and before and after the 12-week exercise program. In case of interaction, the differences within the group were analyzed using the paired t-test. and the statistical significance was set at p<.05. Through these methods, the following conclusions were drawn from the study. First, interaction was seen between time and group in the measurement of body weight and fat before and after the 12-week exercise program for each group. Also, a significant decrease in body weight and fat (p<.01) was observed after the 12-week exercise program. Second, interaction was seen between time and group in the measurement of blood pressure before and after the 12-week exercise program for each group. Also, a significant decrease in systolic blood pressure (p<.001) and diastolic blood pressure (p<.01) was observed after the 12-week exercise program. Third, interaction was not seen between time and group in the measurement of Apo B before and after the 12-week exercise program for each group. Fourth, interaction was seen between time and group in the measurement of NO before and after the 12-week exercise program for each group. Also, a significant increase in NO (p<.01) was observed after the 12-week exercise program. From the above results, it was determined that the 12-week walking exercise program is suitable for hypertensive female patients in their 50's as it was shown to had positive effects on body composition, blood pressure and NO.
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김재욱,차병관,지명진,권태필,박병천,경동현,진훈열,김승회,김종규,Kim, Jae-Uk,Cha, Byung-Kwan,Ji, Myoung-Jin,Kwon, Tae-Phil,Park, Byoung-Cheon,Kyoung, Dong-Hyoun,Jin, Hoon-Yeol,Kim, Seung-Hoi,Kim, Jong-Gyu 대한화학회 2010 대한화학회지 Vol.54 No.6
본 연구는 전이금속이 치환된 묽은 자성 반도체의 자기적 특성을 연구하였다. 울츠자이트(wurtzite) 구조를 가지는 화합물은 졸-겔(sol-gel)법을 이용하여 합성하였다. 열역학적 특성과 자기적 특성을 가진 $Zn_{1-x}Co_xO$은 단일상으로 나타났으며, 농도에 따라 다른 특성을 보여주었다. 묽은 자성 반도체의 특성을 조사하기 위해 X-ray diffraction (XRD), scanning electronic microscope (SEM) 및 vibrating sample magnetometer (VSM)을 사용하였다. 구조 분석을 통해 단일상이 확인된 시료에서는 모두 강자성 특성이 발견되었고, 전이금속 이온의 농도를 5%이상 치환이 되면 강자성이 감소하는 현상이 나타났다. This is the study of magnetic properties of transition metal doped diluted magnetic semiconductors(DMSs). The wurtzite structure samples were synthesized by the sol-gel method. The thermodynamic characteristics and magnetic properties of $Zn_{1-x}Co_xO$ single phase was investigated for different doping concentration (x = 0%, 1%, 2%, 3%, 4%, 5%, 10%, 15%). The property of diluted magnetic semiconductors has been comfirmed by X-ray diffraction (XRD), Scanning Electronic Microscope (SEM) and Vibrating sample magnetometer (VSM). The magnetic properties of pure $Zn_{1-x}Co_xO$ is found to be dominated by the ferromagnetic interaction between doped transition metal ions, where by the ferromagnetic coupling strength is simply increased with the concentration(>5%) of the doped transition metal.
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김재욱,지명진,차병관,김철현,장원철,김종규,Kim, Jae-Uk,Ji, Myoung-Jin,Cha, Byung-Kwan,Kim, Chul-Hyun,Jang, Won-Cheoul,Kim, Jong-Gyu 대한화학회 2010 대한화학회지 Vol.54 No.2
형광체나 반도체의 소자로 사용되는 전이금속화합물 중에서 나노(nano) 크기를 가지는 스피넬 화합물을 합성하였다. 스피넬 화합물의 크기, 합성여부, 열적분석과 화합물의 특성을 확인하기 위하여 열 중량 분석기(TGA), X-선 회절 분석기(XRD), 적외선 흡수 분광기(IR)를 사용하였다. Scherrer식을 이용하여 화합물의 평균 입자 크기가 13~16 nm임을 예측할 수 있었다. 본 논문에 사용된 실험방법은 졸-겔(sol-gel)법을 사용하였으며, 소성 온도는 낮은 온도에서 진행 되었다($350^{\circ}C$). Kinetic 함수인 활성화 에너지와 전환인자를 계산하기 위해서 Kissinger방법과 Arrhenius식을 이용하여 계산하였다. $ZnCo_2O_4$와 $NiCo_2O_4$의 활성화 에너지는 163.42 kJ/mol와 147.01 kJ/mol 값을 가지는 있음을 확인하였다. 그리고 spinel 화합물들의 열역학적 함수(${\Delta}G^{\varphi}$, ${\Delta}H^{\varphi}$, ${\Delta}S^{\varphi}$)를 결정하였다. The spinel compound was obtained by the thermal decomposition of Zn-Co and Zn-Ni gel prepared by sol-gel method using oxalic acid as a chelating agent. The formation of spinel compound has been comfirmed by thermogravimetric analysis (TGA), x-ray powder diffraction (XRD) and infrared spectroscopy (IR). The particle size of 13 nm~16 nm was calculated by Scherrer's equation. The sol-gel method provides a practicable and effective route for the synthesis of the spinel compound at low temperature ($350^{\circ}C$). The kinetic parameters such as activation energy (Ea) and pre-exponential factor (A) for each compound were found by means of the Kissinger method and Arrhenius equation. The decomposition of spinel compound has an activation energy about 155 kJ/mol. Finally, the thermodynamic parameters (${\Delta}G^{\varphi}$, ${\Delta}H^{\varphi}$, ${\Delta}S^{\varphi}$) for decomposition of spinel compound was determined.
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Blue 계열 염료의 열변색 현상에 관한 열역학적 연구
김재욱,지명진,차병관,김종규,Kim, Jae-Uk,Ji, Myoung-Jin,Cha, Byung-Kwan,Kim, Jong-Gyu 대한화학회 2010 대한화학회지 Vol.54 No.5
열 변색 현상을 나타내는 염료 중에서 분자량은 같지만 구조식이 다른 두 염료인 Blue 402 {3-(4-(diethylamino)-2-methylphenyl)-3-(1,2-dimethyl-1H-indol-3-yl)isobenzofuran-1(3H)-one}와 Blue 502 {3-(4-(diethylamino)phenyl)-3-(1-ethyl-2-methyl-1H-indol-3-yl)isobenzofuran-1(3H)-one}의 스펙트럼을 측정하여, 두 염료의 흡광도 변화에 따른 열역학적 함수들을 연구하였다. 염료의 알코올 용매 하에서 탄소 수 변화에 따른 흡광도의 변화를 실험한 결과 탄소수가 증가할수록 흡광도($\lambda_{max}$)의 변화는 장파장으로 이동함을 확인하였다. 흡광도 측정 결과 Blue 502가 Blue 402보다 알코올 용매 하에서 보다 더 안정하다는 것을 확인하였다. 두 염료의 온도 변화에 평형 상수를 측정하여 열역학적 함수들을 계산하였는데, 두 염료의 평형상수는 약 0.9 ~ 1사이의 값을 갖는 것을 확인하였다. 평형상수와 몰흡광계수로부터 계산된 엔탈피 값은 메탄올에서 Blue 402는 약 10.94 kJ/mol, Blue 502는 약 9.010 kJ/mol의 값을 갖는 것을 확인하였다. Two different dyes containing the same molecular weight but different chemical structure have been utilized for the study of thermodynamic parameters. In this study, {3-(4-(diethylamino)phenyl)-3-(1-ethyl-2-methyl-1H-indol-3-yl)isobenzofuran-1(3H)-one} (Blue 502) and {3-(4-(diethylamino)-2-methylphenyl)-3-(1,2-dimethyl-1H-indol-3-yl)isobenzofuran-1(3H)-one} (Blue 402) were used. It has been performed by measuring UV spectra of the two dyes. In general, the blue shift has been observed from both dyes in higher carbon number alcohol solvents. Interestingly, Blue 502 showed higher stability than Blue 402 in the same conditions used in this study. And, the equilibrium constants (0.9~1.0) of the dyes depending upon temperature change were also calculated using UV absorbance. The standard enthalpy calculated from equilibrium constants and molar absorptivity($\varepsilon$) are 10.94 kJ/mol in Blue 402 and 9.010 kJ/mol in Blue 502, respectively.
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