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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.
Mitogenic Effedts of Nicotine to Human Periodontal Ligament(PDL) Cells In Vitro
Row, Joon,Chun, Youn-Sic 대한치과교정학회 1997 대한치과교정학회지 Vol.27 No.6
흡연의 주성분중의 하나인 니코틴은 인체내에서 다양한 전신적 및 국소적인 질환의 원인으로 보고 되어지고 있다. 전신적인 질환에 있어 특히, 호홉기와 순환기 조직세포에 대한 세포분열효과가 많은 연구의 초점이 되어왔으며, 국소적인 효과에 대한 연구에서는 조직파괴나 치료후 치유지연에 대해 보고하고 있다. Platelet-Derived Growth factor(PDGF)와 Insulin-like growth factor(IGF)는 치주인대세포의 세포분열을 촉진하는 주요 성장인자로 알려져 있다. 본 연구의 목적은 니코틴이 사람의 치주인대세포에 미치는 세포분열효과를 알아보기 위하여 니코틴 처리된 치주인대세포로 부터 추출한 PDGF-α and βreceptor 및 IGF-1 수용기의 mRNA 변화를 Northern분석을 이용해 확인해 보고자 함이다. 실험군은 각기 다른 농도의 니코틴(100ng/ml, 1000ng/ml)과 배양액내 혈청농도(1%, 10%)로 나누었으며 이를 각각 니코틴 처리 시간에 따라 분류하였다. 본 연구의 결과로 10%의 혈청의 배양액과 100ng/ml 니코틴 농도군에서 모든 성장인자 수용체의 mRNA가 증가됨을 보였으며 이는 흡연자의 체내 축적 가능한 니코틴 농도에서 치주인대세포의 세포분열을 촉진한다는 추측을 가능케 한다. Nicotine is one of the major components of cigarette smoking which causes various systemic and local diseases to human body. Mitogenic effects of nicotine to systemic disease are interesting factors in the results of cellular proliferation especially to vascular and pulmonary tissue or cells. The study of local effects concerns with destruction of tissue and delayed healing rate after various surgical treatment. Platelet-Derived GRowth factor(PDGF) and Insulin-like growth factor(IGF) are known as major mitogens to human PDL cells. The purpose of this study was to investgate the mitogenic effects of nicotine to human PDL cells. We studied the expression of PDGF-α receptor, PDGF-βreceptor, and IGF-1 receptor mRNA from the nicotine treated human PDL cells by northern analysis. The experimental groups were divided into different serum(1%, 10%) and nicotine(100ng/ml, 1000ng/ml)concentrations and each group was studied by time course. The results of this study showed upregulation of PDGF-α,β receptor and IGF-1 receptor mRNA at 100ng/ml nicotine concentration and 10% serum group to the time course. These results suggest that physiologically attainable nicotine concentration may stimulate the mitogenic gene synthesis to human PDL cells in vitro.
A Study of Fashion Design using Mondrian's Neo-Plasticism - Using Textile CAD System -
Row Young,Lee Youn-Hee The Costume Culture Association 2004 Fashion, industry and education Vol.7 No.2
By introducing Mondrian's creative world into the field of fashion design, I examined how its application can satisfy not only visual expressions but also the desire of fashion design for its simplicity, individuality, and sensitivity. As a program developing designs and guiding how to produce, the textile CAD system helps to develop a variety of textile systems. In case of dying or textile printing, a variety of free expressions of print patterns and functional color simulations are possible by the configuration of colors or enlargement of design. It can also confirm the flexible simulation with a variety of color changes through the monitor by treating the knit design with dots. Especially in case of consulting for the design with ordering customers, the system is very speedy and effective, because it is possible to correct on the spot those complicated elements of designs and color sensation and see the prints in the light of marketing, processing and artistic value. Mondrian's Art, beauty of balance and proportion in the Mondrian's plastic forms, the changes of coloring and texture were added into vertical and horizontal lines and the divisions of faces for the dressmaking. Whether they were the reciprocal action of human body, texture and color or the reciprocal action of human body and colors, these changes will be interpreted differently, depending on the individuals' experiences and psychological moods of situations. The emphases of the sense are also different, depending on the activity and functionality.
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.
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%).
Optimal Mobile - Phase Composition for the Resolution of Deoxyribonucleosides in RP - HPLC
Row, Kyung Ho,Choi, Dai Ki,So, Myoung Seup,Park, Young Kwang 한국공업화학회 1998 Journal of Industrial and Engineering Chemistry Vol.4 No.1
Five deoxyribonucleosides (dCyd, dUrd, dGuo, dThd, and dAdo) were separated by RP-HPLC under isocratic conditions. The volume percent of organic modifier was changed from 3.0 to 10.0 for methanol and acetonitrile, respectively. Potassium phosphate, sodium borate and TADP were used as buffer chemicals. The experimental results showed that for the separation of deoxyribonucleosides methanol was superior to acetonitrile as the organic modifier and the optimum condition of mobile phase was 5.0 vol. % of acetonitrile with 20 mM . sodium borate.