Quinoline誘導體들의 置換基效果에 關한 吸收分光學的 硏究

具原會,朴鍾會 충남대학교 자연과학연구소 1977 學術硏究誌 Vol.4 No.2

In the present work, the ultra-violet absorption spectra of quinoline and its 17 derivatives with various substituents have been studied and discussions are made in terms of inductive and mesomeric effects derived from the first and second order perturbstion theory upon the wavelenth shift and intensty change of the ^(1)L_(k) and ^(1)L_(a) type bands. In order to calculate the respective wavelength shifts of absorption peaks of ^(1)L_(k)bands of the quinoline derivatives which are caused by the substituent effects, modified and extended method of Longuet-Higgins has been used. The calculated results show good agreement with the experimental data. In the case of the quinoline derivatives which have monosubstituent at 2, 3, 4. 5, 6, 7 and S positions respectively, the a-and β-naphthylmethyl anion models have been proposed for the irterpretation band shifts. It has been found that the above mentioned models are quite suitable proposal. In the explanation of the changes in absorption, intensities due to the substruent effects in some monosubstituent quinolines. an attempt has been made to use the idea of spectrpscopic moment put forward by Platt and Petruska. Qualitative agreement between the above mentioned treatments and the experimental results has been obtained. For the purpose of investigating the relationship between the substituent effects on the spectra and basicity of the quinoline derivatives, basicity of quinoline and its 17 detatives are measured in 46 per cent ethanol aqueous solution by the usual spectrophotometric methods. Basicities of quinoline derivatives are discussed in terms of inductive effect of substituents and, in addition, the applicability of the Hammett equation has been tested.

소뇌뇌교각종양에서 수술중 전기생리학적 신경계집중감시의 변화

서대원,박관,안재영,이상구,정진상,홍승봉,이원용,김병준,김종현 대한신경과학회 1999 대한신경과학회지 Vol.17 No.1

청주시 도시관광 연구

박구원 청주대학교 경영경제연구소 2016 경상논총 Vol.8 No.2

최근 관광분야에서는 도시관광이나 관광권에 대한 의미가 커지고 있다. 본 연구는, 최근 청원군과의 통합을 통해 새로운 지방거점도시로서 발전해 가고 있는 청주시를 대상으로, 도시관광이 갖는 관광목적지로서의 역할과 발전가능성을, 관광통계 등을 통해 검토한 것에 있다. 연구결과, 지역관광에서 도시관광이 갖는 기능과 역할은 매우 큰 것으로 확인된다. 또한 관련연구와 사례연구를 통해 보면, 이러한 도시관광의 발전에 있어서는 중심상업지역의 역할이 매우 크고, 이들이 하나의 관광활동목적지로서 기능해 나가기 위해서는 숙박교류기반과 테마자원 등을 통해 관광목적지로서의 명확한 이미지와 실체를 확보해 나가는 것이 무엇보다 필요한 것으로 나타난다. 청주시의 경우, 이러한 중심기능이 매우 떨어져 있고, 시설은 분산되어 있어, 도시관광뿐만 아니라 관광목적지로서의 기능이 매우 약한 것으로 나타난다. 그리고 이러한 도시관광의 기능 부족은 충북관광이 활성화되지 못하는 중요한 원인이 되고 있는 것으로 관찰된다. 본 연구에서는 이러한 연구결과를 토대로, 청주시 도시관광이 관광목적지로 발전하기 위한 몇 가지 기본적인 발전방향을 검토했다.

Cr첨가에 따른 자동차용 소결 밸브시트의 미세조직과 기계적 성질

具原奭,朴種寬,崔昌守,정인상 대한금속재료학회 2002 대한금속·재료학회지 Vol.40 No.8

Valve seat inserts are used in the valve train area of internal combustion engines. Good wear resistance is needed since repeated stress is applied by the valves under combustion gas atmosphere of high temperatures. Currently, most of the valve seat inserts are being manufactured by P/M route. In this study, the characteristics of materials especially the wear resistance with the addition of Cr-hard particles were investigated. The results of this study are as follows: increase in the Cr-hard particles resulted in a decrease of the density of specimens. Pores formed by Cr diffusion from Cr-hard particles was attributed to the reduction in density. As a result, radial crushing strength was decreased with increase of the Cr-hard particals. Engine simulation test indicated that matrix can be hardened with the addition of Cr-hard particles. The excess addition of Cr-hard particles, however, degrades the wear resistance by the increase of residual pores. Therefore, the appropriate amount of Fe-Cr-C hard particles is 1∼5 wt%.

朝鮮 前期 農業生産力의 測定

尹元求 동국대학교 경영관리연구소 1987 經營經濟論叢 Vol.12 No.-

한국 松栢類에 기생하는 진딧물의 分類學的 硏究

李元求,徐洪烈 全北大學校 1991 論文集 Vol.33 No.-

This study was carried out to investigate Korean Conifer Aphids which live on Coniferate. Collections were made through examining foliages and stems of 21 kinds of Coniferae from April, 1987 to June, 1988. As a result of this study, the following 12 species of 3 genera in 2 families were identified. Family Lachnidae * 1. Cinara fresai Blanchard, 1939 * 2. C. juniperi (de Geer, 1773) 3. C. laricicola (Matsumura, 1917) 4. C. laricis (Hartig, 1839) 5. C. louisianensis Boudreaux, 1948 6. C. pinidensiflorae (Essig et Kuwana, 1918) 7. C. piniformosana (Takahashi, 1929) 8. C. tujafilina (Del Guercio, 1909) 9. Eulachnus agilis (Kaltenbach, 1843) *10. E. brevipilosus Bo‥rner, 1940 11. E. thunbergi Wilson, 1919 Family Mindaridae 12. Mindarus japonicus Takahashi, 1931 And of which listed above, 3 species with asterisk are newly recorded from Korea. Because 17 species of 4 genera in 2 familites were known from Korea previously, Conifer Aphids in Korea are summed up 20 species, 4 genera, 2 families at present. In addition, the relationships between Conifer Aphids and host plants were investigated and established.

韓國經濟의 現況과 發展展望

이원구 조선대학교 경영경제연구소 1997 經營經濟硏究 = Management and economics research Vol.20 No.3

洪城 保寧地區의 烏樓山과 其外의 山에서 採集한 昆忠과 다른 生物에 대하여

李元求,金溫植 공주대학교 사범대학 과학교육연구소 1986 과학교육연구 Vol.18 No.1

忠南 洪城群, 保寧群의 六個 調査區에서 採集한 飛蟲은 70科 232種이고, 全體 動物은 97科 303種이 採集, 또는 確認되었다. 北韓에만 捿息하는 것으로 알려진 산굴뚝나비 (Minois antonoe Staudinger) 가 이곳에서 發見되었다. 西韓없고 中韓과 北韓에만 있는 것으로 알려진 꼬마부전나비 (Cupido minimus Fuessly)가 發見되었다. 西韓에만 사는 바둑돌부전나비 (Taraka hamada Druce) 와 中韓에서만 棲息하는 부처나비 (Mycalesis gotoma Moore )가 確認되었다. 이 調査는 人間의 于涉으로 減少되어 가는 이 地域 動物相 硏究의 基礎資料가 될 것이다. Animal fauna of Hongsung and Boryong area was studied from July to November in 1985. Insects, spiders, and other organi는 collected or observed in this area were classified into 303 species under 97 families. A butterfly named Minois antonoe sibirica Ataudinger which is endemic to north Korea was collected. Cupido minimus Fuessly, a butterfly, is also an unrecorded species in this area. Seventy families out of ninty seven families were insects collected in Hongsung and Boryong district. In is the first datum of animal fauna in this area, where a million volt thermo generation electric power plant is located nearby. Studies on the insects fauna of this area will give us comparable darum in the near future for the environ-ment changes incessantly.

독소루비신과 알로퓨리놀이 화학적 근절제에 미치는 영향

정원균,고한웅,강동희,구상환,박승하 大韓成形外科學會 2004 Archives of Plastic Surgery Vol.31 No.3

近代 帝國主義의 形成과 그 特徵에 관한 小考

尹元求 동국대학교 대학원 1986 大學院硏究論集-東國大學校 大學院 Vol.16 No.-

Recent imperialism has specific characteristics different from the ancient or the medieral imperialism. One of the characteristics is the close relationship between recent imperialism and capitalism, which is the fundamental characteristic of recent imperialism. Economically, we can access to the imperialism in the two ways; liberalist theory & Marxist theory. The difference between the two lies in the defference of viewpoint from which they understand the imperialism. The one think the imperialism as onn of the policy alternatives and the other as the natural consequence of historic change. Since capitalism as a mode of production appeared, economy have been reformed to the capitalist system. In this process, the preceding capitalist countries who have experienced industrial revolution early began to find interests from traditional or underdeveloped countries. And this prevailing imperialism characterized the world economy in the end of 19 century. After the establishment of capitalism, there occurred wars between advanced countries to redivide and to epxand their territory, and as a result, this advanced to the situation of the so called "crisis of capitalism." Imperialism have a close relation with the development stage of capitalism. The advance of capitalism brings about capital concetration and centralization and the resutling monopolistic capital experiences a declining rate of interest, so that the capital searches for a more beneficial opportunities to invest from abroad. This is the very economic mechanism of recent imperialism which reflects the law of capital movements. Consequently, there ocurred many problems in the would economy, and the followings are a few of them. ① Trade off between the past suzerain countries and their colonies. ② Unbalance in trade (South-north problem) resulted from ① the trade off. ③ dependence theory These problems have been resulted from the establishment of recent imperial mechanism but are the principal issues world economy should solve solution.