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李庚熙 건국대학교 1969 學術誌 Vol.10 No.1
This experiment was carried out to find out the proper Fungicides on Cucerbits disease (downy mildew, and anthracnose). The results obtained are summarised as follows. 1) Application of Maneb Dithane (M-22), Difolatan spray were effective on control of cucumber downy mildew. 2) Treatment of Zineb Dithane(Z-78), Maneb Dithane (M-22) spray were more effective on control of sweet-melon downy mildew than Difolatan, but Difolatan was most effective on control anthrancnose of fruits. 3. For the control of anthrancnose of water-melon, spraying of Maneb Dithane and Difolatan were more effective than Zineb Dithane (Z-78). 4. In the results, we can recommend Maneb Dithane, Difoiatan for control Cucurbits diseases (downy mildew & anthracnose).
Oxametallaborane 및 Metallacarborane과 Phenyl Carbene 반응에 대한 반응성과 반응메카니즘
성대동,이용희,심경옥 동아대학교 기초과학연구소 2000 基礎科學硏究論文集 Vol.17 No.1
거대고리 뭉치 붕소화합물 중 산소원자를 포함하는 oxametallaborane과 탄소원자를 포함하는 metallacaborane을 이용하여 새로운 metallacarborane을 합성할 수 있는 방법을 알아보고 [9,9-(PMe2Ph)2-arachno-9,6-PtOB8H10]과 [9,9-(PMe2Ph)2-arachno-9,6-PtOB8H12]를 합성한 후 이들에 phenyl diazomethane을 반응시켰다. [9,9-(PMe2Ph)2-arachno-9,6-PtOB8H10]과 phenyl diazomethane의 반응생성물은 예상과는 달리 cis-및 trans-stilbene과 trans, trans-benzaldehyde azine이었다. 카르벤의 이량화 반응은 [9,9-(PMe2Ph)2-arachno-9,6-PtOB8H10]의 촉매 작용에 의해 촉진 되었다. Oxametallaborane의 Pt-원자에 있는 d-오비탈이 카르벤의 삼중항 상태의 T1과 T2전자상태를 안정화 시켰다. [9,9-(PMe2Ph)2-arachno-9,6-PtOB8H12]와 phenyl diazomethane의 반응생성 oxametallaborane의 결과와 유사하였고 동시에 미량의 C-카르벤 삽입 반응생성물이 생성되었다. Metallacaborane의 탄소 원자궤도함수인 SOMO와 phenyl diazomethane의 LUMO가 반응하여 분자궤도함수 에너지를 낮추는데 기여하였다. The reaction mechanism and a new synthetic method using oxametallaborane and metallacarborane compounds are investigated. [9,9-(PMe2Ph)2-arachno-9,6-PtOB8H10] and [9,9-(PMe2Ph)2-arachno-9,6-PtCB8H12] are synthesized then, reacted with phenyl diazomethane to find out a new synthetic method corresponding to the metallacarborane cage compound. Unexpectedly cis- and trans-stilbene and trans, trans-benzaldehyde azine are produced from the reaction of [9,9-(PMe2Ph)2-arachno-9,6-PtOB8H10] with phenyl diazomethane. [9,9-(PMe2Ph)2-arachno-9,6-PtOB8H10] is operated as a kind of catalyst to yield dimerization product of carbene. The d-orbital in Pt-atom of oxametallaborane stabilizes the two triplet states of carbene, T1 and T2. A similar reaction products are produced from the reaction of [9,9-(PMe2Ph)2-arachno-9,6-PtOB8H12] with phenyl diazomethane and a trace amount of a new product is also produced such as C-carbene insertion reaction product simultaneously. The molecular orbital energy is lowered by the SOMO energy of metallacarborane and the LUMO energy of phenyl carbene.
허연,이경희,박원혁 부산대학교 사범대학 과학교육연구소 2000 科學敎育硏究報 Vol.27 No.-
This study was conducted for the development of simulated CAI program for biological experiments of senior high school. The simulated CAI programs were developed for photosynthetic experiments including 7 kinds of experiments.
金基駿,李庚熙 건국대학교 1969 學術誌 Vol.10 No.1
This research has been carried out to find out the proper amount of fertilizer to the crops in the reclaimed land and to find out the kinds of economically profitable crops. Round gourd, udo, seasame increases its production as amount of fertilizer increases, but the yields of white potato was highest in twice amount of fretiliezr of a normal. Yield of seasame was expected on the large amount of fertilizer, but the income was normal application of fertilizer. Potato did not need a twice amount of fertilizer of a normally applicable fertilizer amount for increased income. Soy-bean need a twice amount of fertilizer of anormal application. The earlier round gourd was planted, the more production was expected. udo, round gourd, white potato, seasame, sweet potato, soy-bean were the order of the income raised according to the average amount of fertilizer application. The large amount of udo production can be available in accordance with the increase of consumption, while the production of round gourd increases as the amount of export increases. The mass production of white potato is available because of its large consumption in Korea.
1997학년도 호남대학교 신입생의 인간관계 특성에 관한 연구
염정의,이경희,오승환 湖南大學校 1997 호남대학교 학술논문집 Vol.18 No.1
This study analyses the characteristics of human relations of the Honam University 1997 freshmen. The characteristics of human relations seem to be generally better than that of normative group. In particular, two human relations indices (i.e.. the human relations satisfaction index and the human relations vulnerability index) are consitituted, and they show dependence on sociodemographic variables (sex, religion, social economic status, high school satisfaction). Finally, the summary and recommendations are presented.
해양암반 고정거치석 자동회전 굴진장비 구조설계에 관한 연구
정경식(Kyeng-Sik Jeong),이철희(Chul-Hee Lee),이광희(Kwang-Hee Lee),이선곤(Sun-Kon Lee),김명규(Myeong-Kyu Kim) 한국기계가공학회 2012 한국기계가공학회지 Vol.11 No.4
This paper aims to design and analyze the stationary fixture type automatic rotary drilling machine and estimate the safety of the machine through simulations. Working conditions of typical rock excavating machines are mostly affected by geographical conditions on the sea, such as by the ebb and flow of the tide or high waves. Due to the size of machines, it is difficult to move and install machines. So it is necessary to develop a machine that not only can be moved and installed more easily also be operated more quickly and automatically. To validate the safety of the designed structure of the machine, static analysis has been carried out. The results of stress and deformation analysises show that the designed machine is stable and safe in hard working condition.