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철을 포함하고있는 촉매계를 이용한 고 선택성 산화반응 및 수소화반응에 관한 연구
이명우,이규완,남상성,최명재,전환섭,김성보 한국공업화학회 1999 응용화학 Vol.3 No.2
Iron catalysts supported on various support materials prepared by impregnation, coprecipitation, ion-exchanged, and iron based catalysts using structure of molecular sieves prepared by hydrothermal technique have been characterized by XRD, SEM, BET, H₂ and CO₂ Chemisorption, TPR, TPDC, NMR, NH₃-TPD, IR, and ESR techniques. The oxidation and hydrogenation experiments were carried out using a fixed-bed flow micro-reactor or a batch reactor equipped with an on-line gas chromatography. First, the catalytic activity of iron supported on dealuminated zeolite Y was examined and compared with that of the amorphous support system. Second, catalytic hydrogenation of CO₂ to hydrocarbons over iron catalysts supported on various materials such as Al₂O₃, Al₂O₃-MgO, Al₂O₃-LaO, and KY have been systematically studied. Third, direct oxidation of benzene to phenol over iron-based catalyst system was studied. These catalysts gave an improved yield and selectivity.
직접효소측정법에 의한 HDL-cholesterol 측정법의 평가
이승관,이창규,김상섭,류정록,남현철,이국성,최명재,김승희 高麗大學校 倂設 保健大學 保健科學硏究所 1996 保建科學硏究論集 Vol.5 No.1
We evaluated a new direct assay for quantifying high-density lipoprotein cholesterol. The total CVs of the method ranged between 3.2% and 10.5%. The recovery rates of this method ranged between 99% and 102%. Correlation study were conducted across direct enzymatic method with phosphotungstate precipitation based method as the reference assay. The correlation statistic obtained for 20 specimens were : HDL-cholesterol direct enzymatic assay (Y, DAIICHI Co.) = 1.05735 × precipitation assay(X, Eiken Co.) - 1.6340. Statistics obtained for 40 specimens wane : HDL-cholesteTol direct enzymatic assay(Y, DAHCHI Co.) = 1.00565 × precipitation assay(X, DAHCHI Co.) + 0.40130. Studies from linear relationship statistics had shown that there were no evidence for difference between two methods. In conclusion, the method evaluated here is simple and reliable for measuring HDL-cholesterol in serum without the need for prior separation of other fractions.