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메타크릴레이트계 4차 암모늄 유도체 고분자 전해질의 감습특
김태미,공명선,이임열,박정기,Kim, Tae-Mi,Gong, Myeong-Seon,Lee, Im-Yeol,Park, Jeong-Gi 한국재료학회 1993 한국재료학회지 Vol.3 No.6
고분자 전해질의 화학구조가 감습특성에 미치는 효과를 조사하기 위하여 $C_{1}\sim C_{12}$의 알킬,benzy1, 2,2-diethoxy dthy1기가 치환된 메타크릴계 4차 암모늄 단량체들을 합성하였다. 이들의 감습용액을 0.15mm간격의 빗살 모양의 금전극이 인쇄된 알루미나 기판에 마이크로 주사기로 도포하여 광중합 후 상대습도에 따른 임피던스 변화를 측정하였다. 도포된 막의 두께가 증가하면 임피던스는 감소하고, 치환기의 탄소 길이가 증가할수록 임피던스는 증가하였다. $C_6\sim C_8$의 알킬기를 가지는 고분자 전해질의 감습특성은 30-90% RH 범위에서 18M$\Omega$-5K$\Omega$의 직선적인 임피던스 변화를 보였다. 또한 임피던스는 온도 의존성을 보여주며 온도가 증가하면 임피던스가 감소하며 온도 의존성 계수는 -0,45% $RH/^{\circ}C$이다. 히스테리시스는 $\pm$2%RH이내이며, 33%-85% RH 사이에서의 응답 속도는 약 35sec이었다. Methacryloxyethyl dimethyl alkyl($C_{1}\sim C_{12}$, benzyl and 2, 2-diethoxy ethyl) ammonium bromide monomers were prepared to investigate the relative humidity characteristics for polymer electrolytes with different chemical structures. They were coated on the alumna substrate printed comblike gold electrode by photopolymerization after micro-syringe injection. As the thickness of rhe humid membrane increased, the impendance decreased, whereas the impedance ~ncreased as the carbon cham of alkyl substituent in the monomer increased. The impendance of the polymeric electrolytes with $C_6\sim C_8$ substituents were varied from 19M$\Omega$ to 5K$\Omega$ for the range of 30-90% Mi. The temperature depedence coefficient in the range of 15-$35^{\circ}C$ was found to be -0.45% $RH/^{\circ}C$and the hysteresis falled within the range of $\pm$2% RH. The response time was 35 second for varying humldity from 33% to 85% RH.
인공오염포의 세탁조건에 따른 세척효율에 관한 연구 -세제농도와 용수온도를 중심으로-
최인려 ( In Ryu Choi ),김태미 ( Tae Mi Kim ) 복식문화학회 2014 服飾文化硏究 Vol.22 No.3
Nowdays, costumer`s washing behavior were often times for remove to light-duty dirt. The purpose of this study is to provide the most effective washing conditions of detergent concentration and temperature conditions for help save energy and water resources required to the washing process. Washing conditions were as follows: 2 kinds of detergents and 4 types of artificially soiled fabrics were used. Detergent concentration was 0%, -10%, and -20% below the recommended conc. of manufacturer`s standard. Temperature of bath was 20℃ and 40℃. The results of this study were as follows: First, washing performances of all kind of artificially soiled fabric improved as the temperature of bath at 40℃. Second, the test was conducted under the condition of decreasing respectively -10% and -20% below of the recommended concentration of manufacturer`s standard detergent. The average of washing efficiency was not considerably affected by the reduction of 10% below of manufacturer`s standard. Third, in case of the water temperature were 20℃, polyester/cotton blended fiber were higher degree of washing efficiency than cotton fiber.
황련해독탕(黃連解毒湯)이 외열 스트레스(火邪)에 의한동물모델에서 c-fos 발현에 미치는 영향 연구
황덕상 ( Deok Sang Hwang ),김효근 ( Hyo Geun Kim ),김태미 ( Tae Mi Kim ),이태희 ( Tae Hee Lee ),오명숙 ( Myung Sook Oh ) 대한한방부인과학회 2014 大韓韓方婦人科學會誌 Vol.27 No.3
Objectives: Hwangryunhaedok-tang (HH) is a representative heat clearing multiherb prescription. We evaluated the protective effect of HH against heat stress exposure in mice. Methods: Six weeks old ICR mice were used for this study. After 43℃ heat stressfor 15 minutes, we evaluated the changes of motor activity and c-fos expression level to determine the proper heat stress and evaluation time. The subjects were divided into 4 groups (1. control group, 2. heat stress group with normal saline, 3. heat stress group with administration of 100 mg/kg, and 4. heat stress group with administration of 1000 mg/kg). After oral administration of HH once a day for 3 days,2, 3, 4 groups were exposed to 43℃ heat stress for 15 minutes. Then, we evaluated the motor activity for 120 minutes and analyzed the c-fos expression using western blot. We investigated the effect of HH and its ingredients on c-fos expressions afterheat stress. The mice were administrated HH, Scutellariae Radix, Coptidis Rhizoma, Phellodendri Cortex, and Gardeniae Fructus for 3 days. After one hour of last treatment, the mice were exposed to heat stress at 43℃ for 15 min. After two hours, the hypothalamus was dissociated and lysed to measure c-fos expression. Results: After oral administration of HH for 3 days, motor activity was recovered insignificantly. 100 mg/kg HH treatment reduced the c-fos expression after heat stress but insignificantly. Among the ingredients of HH, Coptidis Rhizoma and Scutellariae Radix treatment groups significantly reduced the c-fos after stress. Conclusions: These results show that Hwangryunhaedok-tang may be effective to reduce the heat stress response.