http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
p-Toluidine, N.N-Dimethylaniline 및 Ethylenediamice을 배위(配位)한 텅스텐 착물(?物)의 합성(合成)
오대변 ( Tae Sub Oh ),이선행 ( Sun Haing Lee ),이임숙 ( Ym Sook Lee ) 경북대학교 과학교육연구소 1977 科學敎育硏究誌 Vol.1 No.-
The tungsten complexes of tungsten-hexachloride with p-toluidine (PT) and N.N-dimethylaniline (DMA) have been prepared in dimethylformamide (DMF) solution. In acetone solution tungsten-hexachloride reacted with ethylenediamine (en) to produce the tungsten-ethylenediamine complex. The formation of the soluble tungsten complex in DMF was studied by UV and visible spectra. The compositions of all the three complexes are assigned as WO3(PT), WO3(DMA), and WOCL2(en) on the elemental analysis for tungsten, chlorine, carbon, nitrogen, and hydrogen and of the infrared spectrophotometry and thermal analysis. The complex, WOCl2(en), is insoluble. The data of the conductivity shows that the compounds of WO3(PT) and WO3(DMA) have the polarity.
과학(科學) 학습과정(學習過程)에서 학생(學生)의 기본개념(基本槪念) 리해(理解)의 실태(實態)에 관(關)한 연구(硏究) -C.M.I 방법(方法)으로-
오대변 ( Dae Sub Oh ),려환진 ( Hwan Jin Yeo ) 경북대학교 과학교육연구소 1980 科學敎育硏究誌 Vol.4 No.-
We studied a student`s understanding of basic scientific concepts in learning process of middle school. Based on the re sult of Test, We made an U-P table and a M-P table by computer. It shows that which concepts are learned by each student. Bt this evidence, We proposed the reforming plans for teaching-learning method. We can conculede that there are many kinds of patterns in learning process of basic scientific concepts.
吳岱變,呂煥鎭 경북대학교 교육대학원 1982 논문집 Vol.14 No.-
The scientific attitudes is divided into eight categories, that is, voluntary, positiveness, continuation, Application, Honesty, Safety, Accuracy and Objectivity. The general measuring scale and forty weiv points are suggested to evaluatl the growth of these attitudes. In this article we discussed about the results of paper tests of scientific attitudes for the elementary school pupils. It was found that the objectives are developed but the positiveness leave something to be desired.
다금속 이온의 분광광도법적 정량에 대한 일반화 표준물 첨가법의 응용
李善行,吳岱變,柳在旭 경북대학교 교육대학원 1985 논문집 Vol.17 No.-
A spectrophotometric determination method for Ni^2+, CO^2+, Cu^2+ and Cr^3+ is described. The analytical method is carried out by the generalized standard addition method (GSAM). The metal complexes formed by ethylendediamine tetraacetic acid (EDTA) were used for the measurement of the absorbance in the aqueous sample by adding the standard sample solutions. The results obtained were calculated by the two methods: incremental difference computation (IDC) and total difference computation (TDC). The effects of the wavelength selection for the GSAM are discussed. This method can be applied to the multicomponent analysis with less than 3.0% of relative errors.