http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
채금희,최동숙 한국 가정과 교육 학회 2000 한국가정과교육학회지 Vol.12 No.3
The major purpose of this study is to investigate the middle school students' consciousness and their participation of household work. The participants were 540 middle school students but the final data used in this study was 489. For the statistical analysis of this study, frequency, percentage, mean, standard deviation. Cronbach's α coefficient. one way ANOVA. t-test. Duncan's Multiple Range Test and Pearson's correlation were calculated. The results of this study were summarized as fallows : 1.It was appeared that the middle school students' consciousness and their participation of household work was high. 2 According to the household environmental variables. there was not any significant difference in the middle school students' consciousness of household work, but there was significant difference in the middle school student's participation of household work. 3 According to the school environmental variables. there was not any significant difference in the middle school students' consciousness of household work, but there was significant difference in the middle school students' participation of household work. 4 According to the degree of family life satisfaction, there was significant difference both in the middle school students' consciousness and in their participation of household work in whole categories. 5.According to the degree of Home Economics course cognition, there was significant difference both in the middle school students' consciousness and in their of household work in whole categories.
마이크로파 주사에 의해 촉진되는 Pd-MCM-41 촉매를 이용한 무용매 스즈키 반응
채금희 ( Keum Hee Chae ),장소라 ( So Ra Jang ),장원길 ( Won Ghil Chang ),안병준 ( Byoung Joon Ahn ) 전북대학교 과학교육연구소 2010 科學敎育論叢 Vol.35 No.-
The carbon-carbon bond formation reaction, such as Suzuki reaction, is a useful tool for the synthesis of biaryl and diaryl-substituted acetylenes. The reaction products are important building blocks for the synthesis of biologically active molecules and synthetic drugs. The development of active catalysts and the efficient reaction conditions for Suzuki reaction have been investigated in the view of environmentally benign green chemistry. Pd-modified MCM-41 was prepared by impregnation using an aquous solution of [Pd(NH3)4]Cl2 and characterized by using XRD, SEM, TEM, EPMA and BET Sorption Analyzer. The microwave-assisted Suzuki reactions are performed under solvent-free condition. Particularly Pd-MCM-41 was found to be best catalysts for these cross-coupling reactions due to the uniform Pd dispersion, unique channel structure and hydrophilic surface property. K2CO3 base was found to be the most efficient base in the microwave-assisted Suzuki cross coupling reaction of phenylboronic acid with iodobenzene. Microwave-assisted coupling reaction under the solvent-free condition was accelerated in a shorter time than it was in the thermal reaction and showed good to excellent yield. The major goal of green chemistry is to maximize the use of starting materials, to increase process selectivity, and to replace hazardous and stoichiometric reagents with eco-friendly catalysts in order to facilitate easy separation of the product. The use of Pd-MCM-41 as catalyst in Suzuki reactions was found to be very suitable to the aim of green chemistry.
장원길,안병준,채금희,장소라,신지혜 한국공업화학회 2013 Journal of Industrial and Engineering Chemistry Vol.19 No.3
In this paper microwave-assisted Sonogashira reactions of phenyl acetylene with aryl iodide using palladium modified Pd-MCM-41, Pd-Y, Pd-VSB-5 and Pd-SBA-15 under solvent-free conditions were described. The results of microwave-assisted Sonogashira reaction using Pd-MCM-41 or Pd-Y in aqueous conditions were also discussed. The microwave-assisted reaction of phenyl acetylene with phenyl iodide using Pd-Y or Pd-MCM-41 and DBU as a base under solvent-free conditions resulted in yields of 85% and 93%, respectively. The reaction with Pd-Y or Pd-MCM-41 using DBU in DMF:H2O (4:1) solution reduced yields to 64% and 76%, respectively.