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Cr(Ⅲ)과 Ρ-Dimethylaminoazobenzene과의 착물형성에 관한 연구
김은수,유수창,이국행 群山大學校基礎科學硏究所 1996 基礎科學硏究 Vol.11 No.-
아세토니트릴, 메탄올 그리고 아세토니트릴-메탄올 혼합용매에서 Cr(Ⅲ)과 p-Dimethylaminoazobenzene(DMAB)을 반응시켜 착물을 얻었다. 15-35℃의 온도범위에 걸쳐 UV-Vis 분광기를 이용하여 다양한 열역학적 성질들을 얻었다. 분광학적 결과들은 반응성과 반응속도가 △H와 △S에 의해 조절된다는 것을 보여주었다. 이온종들의 거동은 전기전도도법으로 연구하였으며, 착물 대 리간드의 비는 1:1과 1:2를 이루는 것으로 나타났다. 착물의 구조는 특징적인 라만밴드들의 변화를 관찰함으로써 예상하였다. The complex of Cr(Ⅲ) with p-Dimethylaminoazobenzene(DMAB) was studied in acetonitrile, methanol and acetonitrile-methanol mixture solvents. Various thermodynamic properties were obtained using UV-Vis spectroscopy at temperature range 15-35℃. The spectroscopic results showed that the reactivity and the reaction rate were controlled by △H, △S. The behavior of the ionic species was studied by a conductometric method, and the ratio of the metal to ligand was found to be 1:1 and 1:2. The structure of the complex was predicted observing the changes in characterisitic Raman bands.
子宮摘出이 家兎 卵巢의 機能에 미치는 影響에 關한 實驗的 硏究
金善行,羅重烈,李壽鍾 고려대학교 의과대학 1983 고려대 의대 잡지 Vol.20 No.3
To understand effects of hysterectomy on the retained ovarian function in the rabbits, pseudopregnancy was induced in seven rabbits, control group, by injection of 50㎍ of ethinyl estradiol and 100 IU of hCG subcutaneously. And a week after hysterectomy of another seven rabbits, hysterectomized group, pseudopregnancy was induced with 50㎍ of ethinyl estradiol and 100 IU of hCG. The serum levels of progesterone and estrogen were determined every 3 day by radioimmunoassay and microscopic examination of the ovaries was performed in each group. Both findings in each group was compared and obtained following results. 1. Luteal phase in hysterectomized group was prolonged about 6 days compared to control group. 2. Histologic examination of ovaries revealed functional corpora lutea in hysterectomized group up to 30 days of experiment. 3. Serum estradiol level and histological picture of the ovarian follicles showed no significant differences between two groups during experiment. 4. These findings show that experimental hysterectomy has inhibitory effect on regressive change of the corpora lutea but has no effect on ovarian follicle. These results suggest that PG is the luteolytic hormone in the rabbit. But, it was presumely concluded that the result in estrogen showed which PGF₂α or some other substances in the uterus might be related to the mechanism of folliculogenesis in ovary according to references.
인행환,김경수 건국대학교 의과학연구소 1998 건국의과학학술지 Vol.8 No.-
Emphysematous pyelonephritis is a serious, acute suppurative infection of the kidney characterized by production of intrarenal and, occasionally, perirenal gas. The disease is considered rare, but life-threatening. We report a case of emphysematous pyelonephritis with intrarenal gas collection caused by E. coli in a 45 years old woman with diabetes mellitus. The patient was successfully managed with intensive medical treatment only.
신행봉,김종수,김홍래,한성현 한국공작기계학회 2004 한국공작기계학회 추계학술대회논문집 Vol.2004 No.-
In this paper, it is presented a new technique to the design and real-time implementation of fuzzy control system based-on digital signal processors in order to improve the precision and robustness for system of industrial robot. Fuzzy control has emerged as one of the most active and fruitful areas for research in the applications of fuzzy set theory, especially in the real of industrial processes. In this thesis, a self-organizing fuzzy controller for the industrial robot manipulator with a actuator located at the base is studied. A fuzzy logic composed of linguistic conditional statements is employed by defining the relations of input-output variable of the controller, In the synthesis of a FLC, one of the most difficult problems is the determination of linguistic control rules from the human operators. To overcome this difficult, SOFC is proposed for a hierarchical control structure consisting of basic level and high level that modify control rules. The proposed SOFC scheme is simple in structure, fast in computation, and suitable for implementation of real-time control. Performance of the SOFC is illustrated by simulation and experimental results for robot with eight joints.
t-Butylhydroperoxide의 肝毒性에 대한 加味行滯湯 合 六味地黃湯의 效果
李樹行,金宇煥 동의대학교 한의학연구소 1997 동의한의연구 Vol.1 No.-
This study was carried out to determine whether Kamihaengche-tang plus Ydkmijihwang-tang(KCYH) exerts the protective effect against oxidant-induced liver cell injury. Cell injury was estimated by measuring lactate dehydrogenase (LDH) and alanine aminotransferase (ALT) release, and lipid peroxidation was estimated by measurimg malondialdehyde, a product of lipid peroxidation, in rabbit liver slices. tBHP increased the release of LDH and ALT enzymes in dose-dependent manner over the range of 0.2-2 mM concentrations. Similarly, tBHP also increased lipid peroxidation, indicating that tBHP-induced liver cell injury was attributed to lipid peroxidation. When 1% KCYH was added to incubation solution, the cell injury and lipid peroxidation induced by tBHP were markedly prevented. The protective effect of KCYH against the cell injury and lipid peroxidation induced by tBHP was dose-dependent in the range of 0.05-1% concentrations. These results indicate that KCYH exerts the protective effect against oxidant-induced liver cell injury, and this effect is attributed to prevention of lipid peroxidation, However, the precise mechanisms of antioxidant effect of KCYH remain to be defined.