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- 저자 : 吳濟直 (검색결과 33 건)
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吳濟直 공주대학교 사범대학 과학교육연구소 1993 과학교육연구 Vol.24 No.1
란탄늄 및 네오디늄과 몇가지 리간드와의 착물에 대한 전기화학적 거동을 0.05M TEAP를 지지전해질로 하여 아세톤용액에서 순환전압전류법으로 금속과 착물의 환원전류의 유형, 가역성, 안정도상수, 전류함수 등을 조사하였다. 환원파는 2단계로 나타났으며, 확산지배적인 반응이었고, 비가역적인 반응이었다. 또한 란탄족 금속이온의 착물에 대하여 안정도 상수가 측정되었다. The electrochemical behaviors of lanthanide ion(La and Nd) and lanthanide complexes with 2,2,6,6-tetramethyl-3,5-heptanedione(THD), Sym-hyroxydibenzo-16-crown-5(HD16C5) and Sym-Dibenzo-16-crown-5-oxyacetic acid(DI6C5A) ligands in aceton solution have been investigated by the use of cyclic voltammetry. The peak potential and peak current, their dependency on the concentration, temperature, the reversibilty of the eletrode reactions are described. The reduction of the lanthanide ions complexes in 0.05M TEAP proceed in two stages. The reduction occurs in one one-electron step and one two-electron step. These reduction step was irrevesible and the reduction current was diffusion dontrolled. Macrocyclic crown ethers, Sym-hyroxydibenzo-16-crown-5(HD16C5) and Sym-Dibenzo-16-crowm-5-oxyacetic acid(DI6C5) were prepared from 1.5-Bis(2-hydroxyphenoxy)-3-oxapentane with epichlorohydrin. The voltammetric behaviors of Ln(Ⅲ)-HD16C5 and Ln(Ⅲ)-D16C5 A complexes in aceton solution have been investigated by the voltammetric method. The composition and stability constants of lanthanide complexes were determined.
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朴成祿,吳濟直 공주대학교 사범대학 과학교육연구소 1982 과학교육연구 Vol.14 No.1
A new gas generator was designed for the middle and high school experimental application. This simple apparatus have more merits in the rapidity, stoichiometry, safety and economy than present experimental apparatus.
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조복현,오광식,오제직 공주대학교 사범대학 과학교육연구소 1998 과학교육연구 Vol.29 No.1
내용 체계는 제 6 차 교육 과정의 독특한 체계로서 전체적으로 지식에 관련된 영역과 탐구에 관련된 영역으로 나누어져 있는데 지식 영역은 물질, 생명, 지구, 운동과 에너지 등의 4개 영역으로 구분되어 지식 내용 요소들을 학년별로 제시하고 있으며, 탐구 영역은 관찰, 분류, 측정, 실험, 자료해석, 조사, 토의 등 7개 탐구 활동 내용 요소가 학년별로 제시되어 있다. As a unique system of the 6th curriculum it divides in two - one is related to knowledge, and the other to science process skill. Especially in science process skill field, it presents seven factors - observation, division, measurement, experiment, understanding the data, investigation, and discussion. This means conversion to living science emphasized sociological, technical, and scientific side through science process skill based on the 6th curriculum.
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서정목,류해일,홍춘표,오제직 公州大學校工科大學生産技術硏究所 1996 論文集 Vol.4 No.-
Nowdays, the development of industrial tequnique needs newly specialized materials which are stable under the chemical and physical conditions. The development of the paints which have heat-resistance at high temperature brings much profits to industries. Inorganic heat-resistance paints are used limitedly to coat special surface of machine by methods of CVD and PVD. These materials are goods of Pyrocat in Oodake Co. LTD., Neccera Coat in JCR Co. LTD., Pyromax in Aremco Co. LTD., and Ceratile in Elosol Co. LTD.. In this study, phtalocyanino silicon series and copolymer were prepared from phtalocyanine and corresponding silanes. The oligomeric materials were Dichloro-(phthalocyaninato)-silcon(PcSiCl₂), Dihydroxy-(phthalocyaninato)-silicon (PcSi(OH)₂), Dimethyldichlorosilane-Phthallocyaninato-silcon (MCS-PcSi) copolymer, Dimethyldichlorosilane-Hydroquinone (MCS-HQ) copolymer, Hydroquinone-Phthalocyanine (HQ- PcSi) copolymer, PcSi(O(CH₂)7CH₃)₂, PcSi(O(CH₂)9CH₃)₂, and PcSi (O(CH₂)11CH₃)₂. The oligomeric materals and other additives are ballmilled for about 16 hours and reduced to coating viscosity with xylene. And they were tested for coating membrane form, specific gravity, viscosity, pH, adhesion, pencil-hardness, chemicaland water-resistance, heat-resistance, impact resistance, and heat-resistance. Heat-resistance paints of phtalocyanino silicone series were developed, which are curing, 170℃, maximum operating temperature of 355℃, and maximum heat-resistant temperature of 560℃. The phtalocyanino silicone series paint which can be used in bonding agent and dye are expected to apply usefully in the industries.
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오제직,최석남,이종길 공주대학교 사범대학 과학교육연구소 1994 과학교육연구 Vol.25 No.1
This paper aims to help the teachers select the textbook and provide them with the basic teaching materials as an ideal model by analyzing the organization (its element and appropriateness), volume amount, experiment matter, and the contents of the highschool chemistry textbooks, which have been revised in accordance with the 5th amended curriculum. The results of the analogy are as follow 1. Organization (its element and appropriateness) : Though having some distincitive characteristics, all the textbooks have almost the same introduction, development, summary, and further study, which are appropriate for the textbook model. 2. The volume amount: All the textbooks have almost the same frame, but s a big difference in such things as the number of pages, of pictures and charts, of Gothic terminology, and relative importance of each chapter. And all the materials such as pictures and photos are black-and-white, which we think are less helpful to the students` study. 3. The experiment matter: There`s a geat difference in the number, kinds, ratio contents and subject of experiment in each chapter. And there are some distinctive characteristics in the type, level, method, and investigative skills of the experiments. 4. The contents : There are considerable differences in the additional and reduced sections. Therefore, which book is selected is very important, and the teachers should not skip any class-work.
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