http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Row, KyungHo (검색결과 589 건)
- 무료
- 기관 내 무료
- 유료
-
노성만,송은규,윤택림,설종윤,신상규 대한골절학회 2001 대한골절학회지 Vol.14 No.2
Purpose: The purpose of this study was to compare the clinical results of subtrochanteric fractures which were treated with compression hip screw, intramedullary nailing and Rowe plate. Materials and Methods: From 1991 to 1999, 84 cases of subtrochanteric fractures were treated in Chonnam national university hospital. Among them, 25 cases were treated with compression hip screw, 18 cases with interlocking IM nailing and 32 cases with Rowe plate. Excluding pathologic fracture, there were 24 cases(group A), 16 cases(group B) and 30 cases(group C) of subtrochanteric fractures which were followed over 1 year. Mean follow up period was 18, 21, 24 months each. We compared the fracture pattern, operation time, operation method, additional fixation, bone union and complications among the groups. Results: We devided subtrochanteric fracture into below class II and above class III based on Seinsheimer classification. The overall clinical results were 1 case below class II, 22 above III in group A, 12 below II, 6 above II in group B, and 4 below II, 26 above III in group C. The average operation time was 153 minutes in group A, 166 in group B, and 150 in group C. Additional wiring was performed in 15 cases in group A, 1 in group B and 6 in group C. Interfragmentary screw fixation was performed only in group A(12 cases). Bone graft was performed in 6 cases in group A, 6 cases in group B and 11 cases in group C. The complications were as follows; delayed union 1 case in group A, 2 cases in group B and 6 cases in group C.; Nonunion only 1 case in group B; varus deformity 4 cases in group B and 2 cases in group C; metal failure 1 case in group B and 1 case in group C. Conclusions: In treatment of subtrochanteric fractures, compression hip screw was applied to more communited fractures than intramedullary nail, but with additional fixation safe union and excellent clinical outcomes obtained. For intramedullary nailing, great care should be taken not to produce varus malalignment. In plate fixation, we should keep in mind the possibility of metal failure and varus malalignment. Weight bearing should be delayed.
-
Fast Determination of Langmuir Isotherm Parameters in Large Concentration of One Solute
Row, Kyung Ho,Choi, Dae Ki,Lee, Youn Yong 한국화학공학회 1990 NICE Vol.8 No.3
A simple method is presented to obtain the Langmuir isotherm parameters. Although this method is limited to the case of large concentration, a few infections enable the determination of the parameters. For a sample of thymine, with the injection volumes ut 1.0 and 1.5 nil, the parameters of a and b are determined as 15.83 ml ml and 0.12 ml mg, respectively.
-
Computational Algorithm to Predict Peak Profiles in Preparative High - Performance Chromatography
Row, Kyung Ho,Larin, Alexander V 한국화학공학회 1996 NICE Vol.14 No.1
the computational algorithm and the Prep-LEAR program have been performed on the basis of the LEA model of chromatography. This program intends for calculation of peak profiles in non-linear high-performance chromatography and uses unsimplied adsorption isotherm equations. The computational algorithm and program rave been tested by applying these to experimental data of thymine adsorption under conditions of reversed-phase high-performance liquid chromatography. The results of numerical calculations fur different sample sire introduced agree satisfactorily with experimental data and show the characteristic properties of high-performance chromatography. The usefulness of the Prep-LEAR program was confirmed by predicting peak profiles in preparative adsorption chromatographic processes.
-
Effect of Sample Sizes on Peak Shapes in Preparative Liquid Chromatography
Row, Kyung Ho,Lee, Youn Yong 한국화학공학회 1992 NICE Vol.10 No.4
Cyclobutane pyrimidine dieters and monomers of thymine were separated on a C_(18) reversed-phase high performance liquid chromatographic column. Using the two mathematical models, the effect of the sample sizes on peak shapes in preparative liquid chromatography was investigated. One of them is. he linear kinetic model, and the other is based on the nonlinear adsorption isotherm. In case of small injections of sample, the good agreements between the calculated value by the linear kinetic model and experimental data were achieved. However, when sample size is increased, this model lacks in the prediction of large concentration profile of sample. However, the nonlinear model permits the accurate prediction of the location of the component hand and the determination of the appropriate time to start and stop collection of the enriched fraction at the higher concentrations of monomer and the lower that of dimer. Therefore, extremely small amounts of dieter can be extracted from monomer solutions.
-
A Chromatographic Theory Based on the Concept of a Layer of Equilibrium Adsorption
Row, Kyung Ho,Larin, Alexander V 한국화학공학회 1995 NICE Vol.13 No.6
The LEA model has been analyzed by comparing to other chromatographic theoretical approaches. In the LEA model a layer of equilibrium adsorption, L serves as an effective kinetic constant. For the layer L. the concentration issuing from this layer is in equililhriur with the average value of adsorption on the whole layer at any moment of time. The value of L, is determined from all factors which broaden the chromatographic zone. Such an approach permits us to combine the features of the mass balance (solute Continuity in a chromatographic column), of the mass transfer phenomenon, and of the trdsorption isttherm into a single first order differential equation. Apart from other layer-by-layer models, the LEA modtl supposes that over the whole column a continuous (real) distribution of adsorption a (1, t) and conccruration c (L, t) is observed. The usefulness of the LEA rrudel in developing a chromatographic theory has horn discussed.
-
COMPUTATIONAL ALGORITHM TO PREDICT PEAK PROFILES IN PREPARATIVE HIGH - PERFORMANCE CHROMATOGRAPHY
Row, Kyung Ho,Larin, Alexander V 한국화학공학회 1995 Korean Journal of Chemical Engineering Vol.12 No.5
The computational algorithm and the Prep-LEAR program have been performed on the basis of the LEA model of chromatography. This program intends for calculation of peak profiles in non-linear high-performance chromatography and uses unsimplified adsorption isotherm equations. The computational algorithm and program have been tested by applying these to experimental data of thymine adsorption under conditions of reversed-phase high-performance liquid chromatography. The results of numerical calculations for different sample size introduced agree satisfactorily with experimental data and show the characteristic properties of high-performance chromatography. The usefulness of the Prep-LEAK program was confirmed by predicting peak profiles in preparative adsorption chromatographic processes.
-
Row, Kyung Ho,Choi, Dae Ki,Lee, Youn Yong 한국화학공학회 1991 NICE Vol.9 No.1
The catalytic oxidative coupling of methane to ethylene and ethane with manganese oxide catalysts promoted with alkali metal and alkali metallic-chloride has been studied at atmospheric pressure in a fixed bed flow reactor. The main studies of reaction were carrel out over maganese oxide catalysts promoted with sodium chloride and the structure and surface morphology of these catalysts was characterized by an X-ray diffraction and a scanning electron microscope. The powdered MnO₂ was changed into Mn₂O₃ and MnO₂ containing alkali metallic-chlorides was nut changed to n.?w ternary oxides but changed into Mn₃O₄, and/or Mn₂O₃, at higher calcination temperature(above 780℃). The optimum content of NaCl promoted was 10-20 wt%, an in over 10 wt%, the conversion and the selectivity were kept constant. The main factor on deactivation of catalysts was the loss of the promoter(NaCl). The addition of alkali metal salts to manganese oxide catalyst has enhanced C₂(C₂+C₂H_6) selectivity due to neutralizing acid sites more than the electronic factor. It was confirmed that chlorine in a kali metallic-chloride has enhanced the formation of C₂H₄ resulting in a good C₂-yield(up to 25.7%).
-
-
PREPARATIVE SEPARATION OF PHOSPHOLIPIDS FROM SOYBEAN BY NP-HPLC
Row, Kyung Ho,Lee, Ju Weon 한국화학공학회 1997 Korean Journal of Chemical Engineering Vol.14 No.5
Soybean phospholipids-phosphatidylethanolamine (PE). phosphatidylinositol (PI), and phosphatidylcholine (PC)-were separated by normal-phase high performance liquid chromatography. The system was operated in a gradient mode. The experimental variables were gradient time and mobile phase composition. The experimental results showed that PE, PI and PC were resolved by three step-change gradient modes which employed ternary systems of hexane/1-propanol/water (58/40/2 and 56/40/4 by vol.%) and methanol/1-propanol/water (80/18/2, by vol.%) for the gradient times of 10, 30 and 76 min, respectively.
-
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
