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보기, 보양, 온리약의 전처치가 glutamate current에 미치는 영향
김창주,김연정,김현배,김이화,이충열,Kim, Chang-Ju,Kim, Youn-Jung,Kim, Hyun-Bae,Kim, Ee-Hwa,Lee, Choong-Yeol 대한동의생리학회 1999 동의생리학회지 Vol.14 No.2
The effects of Bogi, Boyang and Onri herbs on glutamte receptor, and the regulatory mechanism of cAMP-protein kinase on the ion currents activated by Bogi, Boyang and Onri herbs using nystatin-perforated patch clamp were investigated and the following results were obtained. Ginseng radix and Astragali radix, Cervi cornu and Boshniakiae herba, and Aconiti tuber and Zingiberis rhizoma were chosen as Bogi, Boyang and Onri herbs respectively. 1. The ion currents activated by $10^{-5}M$ of glycine were used as controls. The magnitudes of the ion currents by the above named herbs were as follows; Cervi cornu>Astragali radix>Aconiti tuber>Zingiberis rhizoma>Ginseng radix>Boshniakiae herba. 2. The magnitudes of the ion currents by $10^{-5}M$ of glutamate pre-treated with 0.01 mg/ml of Bogi, Boyang and Onri herbs were sharply decreased. 3. The activity of ion channels activated by Bogi herbs pre-treated with $10^{-7}M$ of staurosporin, an inhibitor of protein kinase, for thirty seconds was observed as the experiment proceeded. Staurosporin brought about dephosphorylation of ion channels. Hence, while the activity of ion channels activated by Ginseng radix was decreased, the activity of ion channels activated by Astragali radix was increased, as time went by. 4. The activity of ion channels activated by Boyang herbs pre-treated with $10^{-7}M$ of staurosporin, an inhibitor of protein kinase and an dephosphorylating agent of ion channels, for thirty seconds was investigated. While the activity of ion channels activated by Cervi cornu was increased, the activity of ion channels activated by Boshniakiae herba was initially increased then sharply decreased. 5, The activity of ion channels activated by Onri herbs pre-treated with $10^{-7}M$ of staurosporin, an inhibitor of protein kinase and an dephosphorylating agent of ion channels, for thirty seconds was investigated. While the activity of ion channels activated by Aconiti tuber was increased, that of ion channels activated by Zingiberis rhizomal sharply declined.
과시효처리된 7075 AI합금에 있어서 압연조건이 재결정조직과 강도에 미치는 영향
김창주,김형욱,Kim, Chang-Ju,Kim, Hyeong-Uk 한국재료학회 1994 한국재료학회지 Vol.4 No.2
항공기용 고력 AI합금인 7075 AI합금의 물성개선을 위한 가공열처리 방안으로서 과시효처리후 온간 및 냉간 압연에 의한 소성가공이 재결정조직과 강도에 미치는 영향에 대하여 연구하였다. 소송가공후 재결정처리에 의해 결정립을 미세화하는 공정에서 소성가공 전 과시효를 함으로써 재결정립의 미세화 정도는 더욱 현저하였다. 이는 과시효에 의한 조대한 석출물이 재결정처리시 핵생성 site로서 작용하였음을 의미한다. 본 연구에서 항복강도와 재결정립의 크기와는 Hall-petch식을 만족하지 않았으며 이는 등축이 아닌 연신된 결정조직에 기인된 결과로 보이며, 항복강도가 재결정립의 종횡비에 직선적으로 비례하였다. 또한 결정립 미세화를 통한 강도, 인성향상을 목적으로 하는 TMT(Thermo mechanical Treatment)공정에서는 심한 냉간가공에 의해서보다는 온간에서의 소성가공이 바람직함을 알 수 있었다. We studied on the effects of hot-worm rolling on recrystalized structures and tensile strength in over-aged 7075 A1 alloy, to develop the process for improving properties. It showed more clear effect of the grain refinement with over-aging before plastic deformation. That means, the coarse precipitates from over-aging play a roll as nucleation sites in the course of recrystallization. And on this study, the relations between yield strength and grain size was not satisfied with Hall-Petch equation because of the elongated structure, but the yield strength is proportional to aspect ratio of grains. In TMT process for improving strength and toughness, the worm working is available for increase of those properties than cold working.