N 주개 리간드를 이용한 시스-디니트로실몰리브덴 착물(Ⅱ)의 합성과 특성에 관한 연구

김일출,김광음,도길명,최보용 慶南大學校 附設 基礎科學硏究所 1995 硏究論文集 Vol.7 No.-

The reactions of [(Mo(No)₂Cl₂)₂] with unidentate ligands in CH₂Cl₂ solvent afforded monomeric complexes [Mo(No)₂L₂Cl₂]. [Mo(No)₂L₄](CIO₄)₂ Was obtained by reaction of unidentate with [Mo(No)₂L₂Cl₂] in acetone solvent. 2.2'-bipyridine(bipy), 1.10-phenanthroline(phen), ρ-phentadine(ρ-phe), ο-toludine (ο-tol) were used as coordinating ligands. These dinitrosylmolybdenum complexes are prepared and characterized by elemental analysis, ¹H-NMR, Infrared, and UV-Visible spectroscopy. The infrared spectra indicate that the NO groups occupy cis-positions of the octahedral.

사과원의 초생재배에 관한연구

이용하,장남일,정삼택 경북대학교 1971 生産技術 Vol.5 No.-

We studied on the sod culture at apple orchard from 1968 to 1970. The results obtained can be summarized as follows; 1. There was no difference in the soil temperature between 20 and 40cm. In the sod lopt. But the change of soil temperature in the control plot was remarkable. 2. It was showed that the moisture content was a average 44.7% in sod polt, and 41.0% in control plot. In Weed plot its content was 49.1%. It showed the highest content among sod plots. Comparing this result with first and second year experiment, there was difference meaningly in the soil moisture but no striking difference between third and second year xpeeriment. Soil moisture content was maintained nearly the same amounts after two years from the experiment. 3. Sods produced was 34.5㎏/10m in Weed plot while in orchard grass plot was 15.0㎏/10m. 4. Root elongation of apple tree was 58.3㎝/year in Ladino clover plot, 32.9㎝./year in Weed plot in turn. 5. Shoot elongation of apple tree was 57.6㎝./year (in Ladino clover plot, 57.5㎝./year) in weed plot and 48.8㎝./year in control plot. Shorter by 9㎝. than weed plot. 6. N.P˙ and K. content in the apple leaf was satisfied for the tree growth, and CaO and MgO were also satisfied. During August when fruit and flowed buds are developing, these elements were reduced somewhat. 7. Organic materials are increased at sod plots than control plot. By accumulation of sod in the soil, organic materials and MgO were increased. Ladino clover and Weed plots were 1.09% and 1.04% in MgO element respectively by high amounts of sod production.

교육행정개혁과 「학교운영위원회」에 관한 연구

김용일 고려대학교 교육문제연구소 1996 敎育問題硏究 Vol.8 No.-

한국과 중국 중학 과학교과서 힘과 운동 단원 비교 분석

김규용,김일수 濟州大學校 師範大學 科學敎育硏究所 1999 科學敎育 Vol.16 No.-

This study is aimed to compare and analyze the systems or science education o Korea and China by the choice of the units "Force and Motion" in the Korean middle school textbook for the first grade and Chinese middle school textbook I. The results from the study are as follows; First, both countries have the same purposes of improving scientific technology and society. However, there is a remarkable difference that China should educate their children's ideology. Second, with regard to the unit, "Force and Motion". Korean unit has much more pages, graphics pictures, examples, and experiments, while Chinese unit has more pictures, photos experiments, questions for practice and reading materials. Therefore the contents of the Korean textbooks are much better structured, compared to Chinese textbooks. Finally, the units of "Force and Motion" by the theory of Romey were compared and analyzed. As a result, the contents and the evaluation of the chapter summaries have a tendency of authority. In contrast, the questions in the final section of the textbook and the activity index for inducement of students' exploration have remarkable tendency of exploration. In addition, with regard to the pictures and graphics, Korean textbooks have a tendency of exploration, while Chnese textbooks have a tendency of authority.

오미자 식초 제조를 위한 식초산균 분리 및 동정

임용숙,설일환 동아시아식생활학회 2004 동아시아식생활학회지 Vol.14 No.5

In other to produce vinegar using Schizandru chinensis Ballon(omija), acetic acid bacteria(AAB) were selected from several conventional vinegars, and total 30 acetic acid bacterial strains were isolated. Among the isolated strains, a strain was selected from medium containing omija juice which showed the highest productivity of acetic acid. The strain was identified as Acetobucter sp. C5-1b. Optimum conditions for acetic acid production of Acetobacter sp. C5-1b were involved with 30℃ of fermentation temperature and shaking culture. The acidity of culture medium was reached to 5.3% after 8 days shaking cultivation at 30℃.

외환위기전 한국제조기업의 환위험노출 평가에 관한 연구

최성용,성일진 서울여자대학교 대학원 1999 論文集 Vol.- No.7

This article examines firstly the exposure of Korean manufacturing firms with high export ratio to foreign currency risk. Evidence is presented that the relationship between stock returns and exchange rates differs systematically across those firms. We find that about 27 percent of our sample of 155 Korean Manufacturing firms' stock returns experienced economically significant contemporaneous negative exposure effects and lagged positive exposure effects for the period August 1993 to October 1997. The extent to which a firm is exposed to exchange-rate fluctuations can be explained by the level of its size, export ratio, and book to market ratio.

美軍政期 '敎育自治三法'의 政治學

김용일 고려대학교 교육문제 연구소 1995 敎育問題硏究 Vol.7 No.-

척수 외상의 자기공명영상 및 신경학적 소견 : Delayed MR Image and Correlated Neurology

박용규,정진명,김은상,김재일,송해룡,한종우,신형진 대한신경외과학회 1992 Journal of Korean neurosurgical society Vol.21 No.11

19 patients with traumatic spinal cord injuries and associated neurological deficit were examined by delayed(> 1 month) magnetic resonance imaging(MRI), the result of which were correlated with neurologic and somatosensory evoked potential(SSEP) findings. 5 different MRI patterns were observed in these patients : (1) normal signal intensity(SI) on T1-and T2-weighted images(WI)(pattern N/N, n=6), (2) normal SI on T1-WI and high SI on T2-WI(pattern N/Hi, n=3). (3) low SI on T1-WI and high SI on T2-WI(pattern Lo/Hi, n=6), (4) syrinx(n=2), and (5) cord transection(n=2). The neurologic state was determined using Frankel's classification at admission and MRI time. Pattern N/Hi had best neurologic state except pattern N/N, and pattern Lo/Hi showed worst prognosis except pattern transection. SSEP findings relatively well correlated with neurologic findings, but did not exactly. The cause is probably that SSEP shows predominantly the function of ascending sensory systems of the cord, do not reveal motor pathways, directly or indirectly.

수용액상에서 Infrared Spectra를 이용한 HPDDA, MBDDA, BUDDPA의 특성에 관한 연구

김일출,김광음,도길명,최보영 慶南大學校 附設 基礎科學硏究所 1995 硏究論文集 Vol.7 No.-

Infrared Spectra of aqueous solution of HPDDA(Heptyldithiodiacetic acid), MBDDA(4-Methoxybenzmethyldithiodiacetic acid), and BUDDPA(Butyldithiodipropionic acid) are reported at various PH values. On the basis of the antisymmetric stretching bands of the ionized and un-ionized carboxyl group, the structures of the free-ligands are inferred. A approach to the study of these structures are compared with the results of potentiometric titration curve and IR Spectra studies.

용접구조물 용접토우부의 잔류응력이 피로강도에 미치는 영향 평가

차용훈,김하식,김일수,성백섭 한국공작기계학회 2001 한국생산제조학회지 Vol.10 No.4

This study is to investigate the influence of weld residual stresses on the fatigue crack growth behaviors in pressure ves-sel reinforcement. In order to perform this study, the automatically welded specimens are prepared. The material is ASTM A516 grade 60 steel used in pressure vessel mainly. For pad-on-plate of skip welding, continuous welding and PWHT specimen, fatigue crack initiation is generally initiat-ed at weld starting and end toe zone, and ruptured at weld starting toe zone. Fatigue life of pad-on-plate continuous specimen is increased more than that of pad-on-plate skip fillet welding specimen about 85% under low load, about 20% under high load, and decreased than that of two-pad continuous welding specimen about 85%. In da dN­ΔK curve under low load, pad-on-plate skip fillet welding specimen showed retardation on the initial crack, and the fatigue crack growth rate at the low region of ΔK greater specimen E(3.8 × l0 ^6mm/cycle). And the fatigue life of welding specimen was smaller than that of PWHT specimen.