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Iridium Carbonyls 로부터 제조된 Ir 담지촉매에서 CO 수소화반응
이태진,김장희,장원철,이동조,김윤갑 ( Tae Jin Lee,Jang Hee Kim,Won Chul Chang,Dong Jo Lee,Yoon Kap Kim ) 한국화학공학회 1993 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.31 No.5
Iridium catalysts were prepared by converting Ir(CO)₂(acac) on acidic supports(γ-Al₂O₃, NaY) and basic supports(MgO, Basic Zeolite). The samples were used as catalysts for CO hydrogenation at 120 atm, 200-325℃ and H₂/CO feed molar ratios of 0.5-3.0. Ir catalysts supported on acidic support and on basic support showed markedly different catalytic performance in activity maintenance, olefin/paraffin product ratio, hydrocarbon distribution, and by-product species. These unique results are believed to be due to the presence of different active species on both catalysts. The IR spectra suggested that predominant iridium species in the catalysts supported by the acidic supports were metallic or carbonyl clusters, whereas those of the catalysts supported by the basic supports were carbonyl cluster anions.
사회생태학적 모형에 기반한 한국인 위암검진 수검의 관련 요인
배상수,조희숙,김동현,최용준,이훈재,이태진,이혜진,Bae, Sang-Soo,Jo, Heui-Sug,Kim, Dong-Hyun,Choi, Yong-Jun,Lee, Hun-Jae,Lee, Tae-Jin,Lee, Hye-Jean 대한예방의학회 2008 예방의학회지 Vol.41 No.2
Objectives : We measured behavioral factors associated with Koreans receiving gastric cancer screening based on a socio-ecological model, in part to develop strategies to improve cancer screening rates. Methods : A telephone survey was conducted with 2,576 people chosen through stratified random sampling from April 1 - May 31, 2004. Collected information included gastric cancer screening, socio-demographic factors, and socio-ecological factors at intrapersonal, interpersonal, community, and public policy levels. Results : Among 985 survey respondents(380 men and 605 women), 402 had received gastric cancer screening. Logistic analysis was performed to compare those screened and unscreened. 'Age' was the only demographic factor that showed a statistically significant association with getting screening. People in their fifties (OR=1.731, 95% CI=1.190-2.520) and sixties (OR=2.098, 95% CI=1.301-3.385) showed a higher likelihood of getting screened, compared to those in the forties. 'Accessibility to a medical institution' was a significant factor related to having gastric cancer screening at the intrapersonal level. At the interpersonal level, recommendations by family members to be screened and a family practice of routine cancer screening were significantly related. People with frequent education about cancer screening or with stronger social feelings that cancer screening is necessary also demonstrated significantly higher tendencies to be screened. Conclusions : In conclusion, a socio-ecological model seems appropriate for explaining gastric cancer screening behavior and associated factors. Health planners should develop integrated strategies to improve cancer screening rates based on socio-ecological factors, especially at the interpersonal and community levels.
Ruthenium Carbonyl로 부터 제조된 Ru 담지촉매에서의 벤젠수소화반응
이태진,장원철,이동조 嶺南大學校 工業技術硏究所 1993 工業技術硏究所論文集 Vol.21 No.2
The ion exchange ?? and the carbonyl complex impregnation ?? method were employed to prepare supported Ru catalysts encaged in the pores of X zeolites (NaX, Na-cluster X, KX), and their catalytic behaviors for benzene hydrogenation were compared. The benzene hydrogenation was performed with a micro reactor operating at atmospheric pressure, temperature of 50-250℃, and hydrogen/benzene ratio of 5.33. The activity of carbonyl derived catalysts was significantly higher that of ion exchanged catalysts. Irrespective of preparation method, the activity decreased in the catalyst sequence of Ru/Na-cluster X>Ru/NaX>V/KX, while the tendency to exhibit deactivation decreased in the sequence of Ru/NaX>Ru/Na-cluster X> Ru/KX. The difference in activity and deactivation pattern was attributed to the surface acid and base property of zeolites. The catalytic behaviors of benzene hydrogenation over Pt/Nylon-66, pt/C [K₂PtCl₄], Ru/Nylon-66 and ?? were also investigated. Pt/Nylon-66 produced substantial amounts of the in termediate, cyclohexene. The activity of all the samples showed a temperature-dependent maximum, but the temperature of activity maximum of supported Ru catalysts lower than that of supported Pt catalysts.