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전수아,안지훈,서항석,김한준,박의용 한국추진공학회 2022 한국추진공학회지 Vol.26 No.6
In this study, the curing characteristics of commonly used Hydroxyl terminated polybutadiene(HTPB)-based solid propellant according to the curing temperature and Equivalent ratio change were investigated. In addition, the effect of curing reaction according to their ratio and content in the Triphenyl bismuth(TPB), Maleic anhydride(MA) and Magnesium oxide(MgO) catalyst systems was confirmed. Finally, moisture was added for each propellant mixing process to check the effect of moisture on propellant curing. 본 연구에서는 일반적으로 사용하는 Hydroxyl terminated polybutadiene(HTPB)계 고체 추진제의 경화 온도와 당량비 변경에 따른 경화 특성을 고찰하였다. 또한, Triphenyl bismuth(TPB), Maleic anhydride(MA) 그리고 Magnesium oxide(MgO) 촉매 시스템에서 이들의 비율 및 함량에 따른 경화 반응 영향도 확인하였다. 마지막으로 추진제 혼화 시 각 공정 별 수분을 투입하여 수분이 추진제 경화에 끼치는 영향을 확인하였다.
전수아,정다운,신문철,윤동현,김태호,권오상,이상훈 한국전통의학연구소 2008 한국전통의학지 Vol.16 No.1
Objetive : The cold feeling disease is feeling a cold at normal temperature in specific part of body and it can be felt by oneself and the others. This disease let the person who has the disease take various inconvinience in daily life but they don't take any specific care and actucally there are not efficient care. In this study we took Tae-gye(KI3) which is one of the nine point that circulating energe to whole body(回陽九針穴) and observe the efficiency conpare with non acupoint Methord : We used infra-red thermometer to measure the temperature of hand and arm. Acupuncture is treated using Park-sharm device for double-blinding test. Temperature of PC8 is compared with LU4 for measure the coldness of hand. Results : Taking the temperature of Before-state, average temperature of PC8 is lower then LU4 at 0.3℃ degree. Right about acupuncturing, temperature of PC8 got lower at 0.238℃ degree comparing LU4 in treatment group and , got higher at 0.5℃ degree in control group, but both of them have no significance(p>0.05) During the acupuncturing, temperature of PC8 got higher at 0.388℃ degree then LU4 in treatment group and got higher at 0.975℃ degree in control group, but both of them have no significance(p>0.05). After remove the acupuncture, temperature of PC8 got lower at 0.013℃ degree then LU4 in treatment group and got higher at 0.713℃ degree in control group, but both of them have no significance(p>0.05). In control group, the differences of change are very intense for each grade and they had large standard deviation. In treatment group the differences are decreased gradually and they had small standard deviation(SD=0.424) compare with control group (SD=0.723) but there are no significant difference. Conclusion : The results suggested that KI3 can decrease the difference of temperature between PC8 and LU4, and reduce the coldness of hand. After this, study with more group is needed to verify the possibility.
전수아,노현민,조은희,박민철,Jeon, Soo-A,Noh, Hyeon-Min,Jo, Eun-Hee,Park, Min-Cheol 대한한방안이비인후피부과학회 2017 한방안이비인후피부과학회지 Vol.30 No.2
Objectives : The purpose of this study was to research the antibiotic, antioxidant and whitening effects of Jwa Kum-Whan(JKW) and Soo Ryeon-Whan(SRW). Both Jwa Kum-Whan and Soo Ryeon-Whan are composed of Coptidis rhizoma and Evodiae fructus, but the ratios of the two species are different. JKW is composed of Coptidis rhizoma and Evodiae fructus by ratio of 6:1 and SRW's ratio is 1:1. Methods : Antibiotic activities of JKW and SRW's water extracts were studied by paper disc diffusion method. Four kinds of bacteria were applied in paper disc, and each extract was dropped, individually. The diameter of inhibition zone was measured. DPPH assay was used for studying free radical scavenging activity. DPPH is quantitatively decolorized from purple color by antioxidant material. Change of color was measured by spectrophotometer. Whitening activity was analyzed by tyrosinase inhibition assay. Tyrosinase is major enzyme for control process of making eumelanin. Optical Density was measured by spectrophotometer. Results : Candida albicans and Staphylococcus aureus's inhibition zone were made large available by Both prescriptions. Inhibition zone's diameter of JKW was preferable to SRW's. Radical scavenging activity was better at SRW, but JKW's activity was available, too. Tyrosinase inhibition activity was found out available only for JKW, not for SRW. Conclusions : JKW had antibiotic effects for Candida albicans, Staphylococcus aureus. And had antioxidant, whitening effects. SRW had antibiotic, antioxidant activities but not whitening effect.