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Co(Ⅱ) Tetraphenylporphrin의 Ligand 添加反應에 對한 反應速度論的 硏究
李相協,呂煥鎭,吳京姬 경북대학교 과학교육연구소 1987 科學敎育硏究誌 Vol.11 No.-
The reaction of Imidazole, Pyridine, Lutidine and Methylamine with Co(TPP), where TPP is tetraphenylporphyrin are investigated in the temperature range between 25℃ and 40℃ by measuring the visible absorption spectra of a series of solution in which solvent is varied. Solvents which is used are Tetrahydrofuran, N-N dimethylforamide and Methanol. As solvent is varied, coordination number of complex is changed. In THF solvent, hexacoordinated to Co-porphyrin species of the type Co(TPP)L_2 are dominant. But when Lutidine is coordinated to Co(TPP), five-coordinated Co-porphyrin is dominant. In this study, solvent effect and ligand effect is considered.
이상협 연세대학교 동서문제연구원 2015 동서연구 Vol.27 No.4
This study argues that the traditional Korean developmental state has reinvented and reinvigorated itself into a new developmental welfare state. However, in contradistinction to the Western corporatist experience of collective bargaining between labour and business or the democratization argument of the emergence of policy preference networks, the Korean state (i.e., social bureaucrats) has undertaken responsibility for labour protection with two key characteristics. First, the focus of the state’s catch-up strategy in this new developmental form of the welfare state shifted from economic growth to social (policy) growth and growth of the welfare system, and second, a new type of technocrat, the social bureaucrat, emerged to play a key role in labour protection reforms.
Co(Ⅲ) Glycine 착물의 합성과 구조 및 기초적 이론에 관한 연구
李相協 慶北大學校 師範大學 1973 敎育硏究誌 Vol.15 No.-
The complexes of [Co(en)_2 (NH_2CH_2CO_2CH_3)Cl]Cl_2 were prepared and disscussed by means of Two Center Hu¨ckel method. On the basis of the calculations by the Two Center Hu¨ckel Method for the structure of the ligands, ethylenediamine, glycinesters. In addition, visible and infrared spectrum data interpreted in terms of Crystal Field Theory using empirical parameter 10Dq in order to kinetic application.
이상협,김태임,정소향,정재림,정성근,김응권,Sang Hyup Lee,Tae-im Kim,So Hyang Chung,Jae Lim Chung,Sung Kun Chung,Eung Kweon Kim 대한안과학회 2007 대한안과학회지 Vol.48 No.3
Purpose: We report a case of keratitis of Stenotrophomonas maltophilia and Coagulase negative Staphylococcus in a recurrent corneal erosion patient. Methods: A 29-year-old female patient was referred to our clinic for an intractable corneal ulcer in her left eye. Results: Her best corrected visual acuity in her left eye was 10/400 and the cornea showed a 2×2 mm corneal infiltration at the 6 o’clock position along with endothelial plaque. Initially, 5% cefazolin, 1.4% tobramycin, 3.3% vancomycin, and 0.125% amphotericin were administered every 2 hours, and Natacyn? was administered every 4 hours, but corneal infiltration was still aggravated. After nine days of medical treatment, the advancement of the conjunctival flap was performed. The lesion had not improved, and corneal scrape and culture were repeated. Stenotrophomonas maltophilia and Coagulase negative Staphylococcus were identified. Treatment with clindamycin and Cravit?, to which isolated organisms are susceptible, was started, and the lesion improved. During the treatment, her right eye showed a painful epithelial defect in the morning, and a few days later recurrent corneal epithelial bullae developed in her left eye. She was diagnosed with recurrent corneal erosion in both eyes. The infection lesion improved by using 2% clindamycin and Cravit?, but the corneal bullae were not controlled, and therefore all eyedrops gradually tapered. After the cessation of eyedrops, corneal epithelial bullae disappeared. When she visited our clinic 12 days after discharge, her vision was 20/30 and her corneal lesion had improved completely.
trans-Nitroaquobis(acetylacetonato) Cobalt(Ⅲ)의 산가수분해 반응속도에 대한 온도 및 압력 영향
李相協,朴寅輔 慶北大學校 1984 論文集 Vol.37 No.-
trans-Nitroaquobis(acetylacetonato) Cobalt(Ⅲ) undergoes hydrolysis in neutral or acidic media at 30∼40° to give diaquobis(acetylacetonato) Cobalt(Ⅲ) Cations which are rapidly reduced to Cobalt(Ⅱ) species. A spectrophotometric study of the hydrolysis reaction has provided the various kinetic parameters. The rate constants are increased with increasing pressure at constant temperature. The pseudo-first-order reaction is found to be unaffeted by changes in ionic strength of acidity.