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이효원,이윤영,Lee, Hyo Won,Lee, Youn Young Korean Chemical Society 1975 대한화학회지 Vol.19 No.1
2-Acetothienone과 chloral을 축합시켜 chloral-2-acetothienone을 생성하였으며 이것을 탈수하여 trichloroethylidene-2-acetohienone을 합성하였다. Trichloroethylidene-2-acetothienone과 phenylhydrazine 또는 치환된 phenylhydrazine들과의 반응으로 2-aryl-6-(2-thienyl)-3(2H)-pyridazinone들을 얻었으며 hydrazine과의 반응에서는 3-(2-thienyl)-5-trichloromethyl-2-pyrazoline이 합성되었다. Chloral-2-acetothienone was synthesized from the condensation of 2-acetothienone with chloral, and trichloroethylidene-2-acetothienone was obtained from the dehydration of chloral-2-acetothienone. From the reaction of trichloroethylidene-2-acetothienone with phenylhydrazine or substituted phenylhydrazines 2-aryl-6-(2-thienyl)-3(2H)-pyridazinones were obtained. 3-(2-Thienyl)-5-trichloromethyl-2-pyrazoline was synthesized from the reaction of trichloroethylidene-2-acetothienone with hydrazine hydrate.
솔보써말 방법을 이용한 구리분말 제조 및 전자파 차폐제로의 응용
이효원,김수룡,권우택,최덕균,김영희,Lee, Hyo-Won,Kim, Soo-Ryong,Kwon, Woo-Teck,Choi, Duck-Kyun,Kim, Young-Hee 한국재료학회 2006 한국재료학회지 Vol.16 No.5
Copper powders have been widely used in electrically conductive coatings, electrode materials et al. and are very prospective since they are cheaper than noble metal powders such as silver or palladium. In this study, copper powders for metal filler of EMI shielding have been prepared using a solvothermal process from $CuSO_4$, NaOH, Glucose, mixed solvent ($H_2O$: Ethanol) and hydrazine which was used as a reducing agent at various reaction conditions. The prepared copper powders showed finely dispersed spherical shape without agglomerate, uniform morphology, narrow size distribution, high purity and were about 400-700 nm in size. The prepared powders were characterized using XRD, SEM, TGA, XPS, particle size measurement and EMI shielding efficiency.
파종량과 질소시비수준이 피 ( 삼 ) 의 성장 , 일반조성분 및 건물수량에 미치는 영향
이효원,김동암 ( Hyo Weon Lee,Dong Am Kim ) 한국축산학회 1980 한국축산학회지 Vol.22 No.1
This study was carried out to find out the effect of seeding rates and N upon the chemical composition and dry matter yield of lapanese barnyard millet (Echinochloa crusgalli var frumentacea (Roxb.) W.F. Wight). Two different seeding rates of Japanese barnyard millet (main plot) were 2 and 4㎏ per l0a and as subplot 5, 10 and 15 15㎏ per l0a of N was applied. The experiment was arranged as a split-plot design with three replications and undertaken over a period of 3 months from June to August, 1979. The results obtained are as follows: 1. DM yield was influenced by N fertilizer level There was no significant differences between forage yieles obtained from a single 10㎏/l0a of N application plots and 15㎏/l0a of N application plots while a significant differences at 5% level between 5㎏/l0a of N plots and other plots was shown. Therefore it is apparent that 10㎏/l0a of N level seems to be a desirable level when N fertilizer is used in a single application. 2. Seeding rates did not affect DM yield at any N level. There was no interaction between S (seeding rate) x N(nitrogen level) for DM yield. It was indicated that 2㎏ seeding rate per l0a was advisable in drilled plot. 3. Percent crude protein was greatly influenced by the different N fertilizer level. Crude protein yield showed high yield as N fertilizer increased and low as decreased. 4. Neither seeding rates nor N fertilizer levels had any effect on the plant height, and higher leaf-stem ratio in 15㎏/l0a treatment than that of other treatment was observed.
이효원,Lee Dong Joon,임창수 대한화학회 2021 Bulletin of the Korean Chemical Society Vol.42 No.9
Imaging and photodynamic therapy through two-photon excitation can be applied to medical application of deep inside the tissue by minimizing light absorption by the tissue. It is the best solution that can complement the shortcomings of conventional photodynamic therapy. In addition, auto-fluorescence can be minimized, and damage to normal cells can be avoided through spatial and temporal control. To maximize the image realization and the effect of treatment, a single photosensitizer with high fluorescence quantum yields, two-photon absorption value, and good 1 O2 or reactive oxygen species production performance must be developed. Therefore, recent research related to this topic is summarized. In addition, two-photon photosensitizers that approach selective imaging and treatment for target diseases and future challenges were discussed.
트리암시놀론이 배양된 사람 섬유아세포의 생존과 산화질소 생성에 미치는 영향
이효원,김재우,Hyo-Won Lee,Jae-Woo Kim 대한안과학회 2005 대한안과학회지 Vol.46 No.11
Purpose: To investigate the effect of triamcinolone acetonide (TA) on cell survival and nitric oxide (NO) production in cultured human Tenon`s capsule fibroblast (FB) cells. Methods: After exposed to TA, indomethacin, and dexamethasone for 2 days, cell survival and nitrite production of primarily cultured human FB cells were assessed with MTT and Griess assays, respectively. Results: Cell survival increased after exposure to TA at low concentrations but decreased at high concentrations. TA decreased the production of NO significantly (p<0.05). Exposure to indomethacin and dexamethasone revealed similar results. Conclusions: Both the biphasic effect on cell survival and the decreased production of NO induced by TA in FB cells could affect conjunctival wound healing