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단위체와 고분자 리간드를 포함하는 Cu(Ⅱ) 착물의 과산화수소 분해반응에 대한 촉매 활성도
김동수,조태섭 嶺南大學校附設 基礎科學硏究所 1984 基礎科學硏究 Vol.4 No.-
[Cu(en)₂PEI]SO₄and [Cu(en)PEI]SO₄type polymeric complexes of octahedral form were prepared from ethylenediamine(en)-Cu(Ⅱ) complexes and polyethyleneimine(PEI) by procedure similar to that reported for the preparation of[Ni(PEI)]Cl₂. Moreover, their catalytic activities in the decomposition reaction of hydrogen peroxide were compared with those of corresponding square planer monomeric complexes[Cu(en)₂]·SO₄and [Cu(en)(H₂O)₂]SO₄; it was found that their activities decrease in the following order: [Cu(en)₂PEI]SO₄??[Cu(en)₂]SO₄??[Cu(en)PEI]SO₄>[Cu(en)(H₂O)₂]SO₄
Palladium(Ⅱ)이온과 Branched Poly(ethyleneimine) 간의 착물생성에 따른 안정도 상수
曺泰燮 嶺南大學校 基礎科學硏究所 1994 基礎科學硏究 Vol.14 No.-
Potentiometric and electronic absorption spectroscopic studies of palladium(Ⅱ) complexes with branched poly(ethylenimine)(BPEI) as polymeric ligand showed that one or two nitrogen donor atoms on BPEI chain are coordinated to Pd(Ⅱ) ion in square-planar as Pd(Ⅱ) -N complexes from the formation curves and mole ratio analysis results in 1.0M KCI aqueous solution at 25℃. The stepwise stability constants calculated directly from the pH titration data based on the modified Bjerrum method, log k₁and log k₂, were 6.07 and 4.55 at BPEI.H+/Pd(Ⅱ) mole ratio of 5.00, and 4.77 and 4.22 at mole ratio of 10.0.
우리나라 선사시대 소과(Bovidae) 화석에 대한 고찰
조태섭 한국구석기학회 2009 한국구석기학보 Vol.- No.20
During the Quaternary, the paleoenvironment of Korean Peninsular has been changed several times. The fauna discovered in the prehistoric sites, especially the Bovidae fossil permit to estimate the climatic conditions of the prehistoric Korea. Four species of Bovidae family have been present and its faunal composition has been changed through the Quaternary in Korea. Based on the these fossils, we may notice as follows: 1) Bos primigenius had been present whole the Pleistocene and it has been changed to Bos taurus in Holocene. 2) Bison priscus had been dominant during the Upper Pleistocene but it had been extinct in Holocene. 3) Bubalus sp. had been widely spread in Korea, especially in the North-western part of Korea during the middle Pleistocene and it was disappeared then after. But this animal has been reappeared during the early Holocene period. 4) Bos Taurus was the dominant Bovidae species during the Holocene and it would be related with human activities such as domestication and cultivation. From the changes of Bovidae in Korean peninsular, we may interpret that the climatic condition of the middle Pleistocene of our country would be relatively warm and it became colder during the upper Pleistocene. And it became warm during the early Holocene and it changed to a temperate climate as today.
Polyelectrolyte-Metal Ion 의 착물화(제7보), Poly(ethyleneimine)과 Uranyl Ion간의 착물생성에 따른 안정도상수
金東洙,曺泰燮 嶺南大學校 基礎科學硏究所 1992 基礎科學硏究 Vol.12 No.-
The stability constants for the complex formation of poly(ethyleneimine) with uranyl ion in an aqueous solution have been determined by a modified Bjerrum method proposed by Gregor et al. the formation curves of the complexes in the system of ionic strenth of 0.1(KCl) at 30℃ showed that two nitrogen atoms on the branched poly(ethyleneimine) chain combined with uranyl ion. The numerical values of overall stability constants (log β₂) were 7.07, and 7.20 at 5.0 and 10.0 mole ratio of ??, respectively.
중국 대련시 낙타산(駱駝山) 금원동(金远洞)동굴의 발굴과 유적의 성격
趙泰燮,趙 博,劉金远 한국구석기학회 2015 한국구석기학보 Vol.- No.32
최근 우리나라에서 많은 구석기유적들이 찾아지고 조사되는 것처럼 중국에서도 요즈음 새로운 유적들이 계속해서 찾아지고 있다. 이 가운데 하나인 대련(大連)시의 낙타산(駱駝山)에 자리한 금원동(金远洞) 동굴유적에 대해 유적의 조사경위와 발굴 진척 사항, 유적의 성격 등에 대하여 살펴보기로 한다. 요동반도의 남쪽 끝에 자리한 대련은 한반도와 지리적으로 매우 가까운 곳이며 특히 갱신세시기에는 대륙으로 이어져 있었을 것으로 추정되는 곳으로 우리에게도 매우 중요한 비교 연구 대상지역이기도 하다. 이미 요령 성에서는 묘후산(廟後山), 금우산(金牛山) 등을 비롯한 많은 구석기시대의 유적이 알려져 있다. 특히 금원동 동굴은 북경의 주구점(周口店) 유적과 비견되는 유적으로 이 유적의 연구 성과가 밝혀지면 더욱 많은 자료들이 밝혀져 한국과의 비교 연구가 가능해지고 나아가서는 동북아시아에서의 구석기시대의 성격을 밝히는데 많은 도움을 줄 것으로 기대된다. 이 유적의 소개에는 중국 대련시의 대련자연박물관의 조박 관장님, 유금원 연구원님의 많은 도움이 있었으며 특히 중국과학원 고척추동물여고인류연구소의 김창주 교수님께 감사의 말씀을 드린다.
김동수,박정학,조태섭 嶺南大學校府設 基礎科學硏究所 1983 基礎科學硏究 Vol.3 No.-
Cr(Ⅲ), Co(Ⅱ), Ni(Ⅱ) and Cu(Ⅱ) complexes with polyethyleneimine(PEI) as ligands have been prepared in absolute ethanol, and the structures of the complexes were chracterized by reflectance and infrared spectra. The structures of obtained complexes were pendant-type and polymer chelate type. [Cr(H₂O)₄ CI(PEI)CI₂] with pendant-type was insoluble in organic solvents, acids, DMF and DMSO, another complexes, [Co(PEI)]CI₂ [Ni(PEI)]CI₂ and [Cu(PEI)]CI₂ with polymer chelate were soluble in water. Especially, in aqueous solution, chlorides of [Ni(PEI)]CI₂ was substituted by H₂O.