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김기용,윤준오,이수호,신헌규 울산대학교 의과대학 1992 울산의대학술지 Vol.1 No.1
The ankle joint is a modified complex hinge joint which plays an important role in weight bearing, walking and standing. So, the goals of treatment of ankle fracture are anatomical positioning of the talus in the mortise and regaining a smooth articular surface. The Lauge-Hansen classification of ankle fracture is useful because it characterized the mechanism and sequence of injury and in particular, emphasizes the associated ligamentous injuries. But, it is more complex and all fractures do not conform exactly to one of the described pattern. The Danis-Weber classification of ankle fracture is simpler, emphasized the importance of the lateral side of the ankle, and is usuful in planning surgical treatment. Initially this system did not distinguish the extent of involvement and was too inclusive. The problem has been addressed in the AO classification. The system proposed by Tile is easy to remember and emphasized the importance of assessing and relating stability to the structures that are injured. We analyzed 124 cases of ankle fracture, most of which were treated surgically by AO methods, in the Orthopedic Department, University of Ulsan Medical College, Asan Medical Center from July 1989 to March 1992. The results obtained from this study were as follows : 1. The most common victim was 3rd-5th decade's man. 2. The most common type of Danis-Weber classification was type C(36.3%) and most common type of AO classification was type C1(15.3%), C2(15.3%). According to the classification of Lauge-Hansen, the most common type was pronation-external rotation (42.7%). 3. In Danis-Weber type B and C, satisfactory results were obtained by operative treatment. 4. Danis-Weber's classification and A-O classification were very practical criteria for treatment of the ankle fracture.
김기선,조명수 한국공작기계학회 2004 한국생산제조학회지 Vol.13 No.5
This paper presents the tension control of a wire-cut discharge machine using electrorheological(ER) fluid based brake system. On the basis of the tension level required in the machine, an appropriate size of the ER brake which features design simplicity, fast response and salient controllability is designed. Considering the Bingham property of ER fluid and actuator response time, the governing equation of the ER brake is derived. And a tension propagation of wire electrode is modeled via frequency response. The tension control performance of the discharge machine is simulated by using a robust sliding mode controller.
유전인자의 해석을 위한 하부구조의 물리적 상호작용 연구
한찬수,김문집,전성식,김기수 순천향 대학교 1984 논문집 Vol.7 No.2
유전인자의 해석을 위한 하부구조의 온도변화에 의한 Base pairing transition의 분자구조적 상호작용을 규명하기 위해 RNA 계통의 Polyinosinic-Polycytidylic, Polyguanylic-Polycytidylic, Polyadenylic-Polyuridylic을 이용하였다. 주요연구는 Superconductor에 의한 Ultra-high resolution NMR을 이용하였고, Data는 Computer의 처리에 의해 분석되었다. NMR 분석결과는 UV 스펙트럼에 의한 melting point 결정방법과 비교하여 이론치와 잘 일치됨을 얻었다. In order to interpret the physical interaction of hyper-fine structure for the molecular analysis of gene, the transition of binding structure based on a temperature dependence is applied to the polyribonucleotides which is prepared by polyadenylic-polyuridylic, polyinosinic-polycytidylic, polyguanulic-polycytidylic, respectively. Ultra-high-resolution proton nuclear magnetic resonance spectra at 400MHz which is generated by superconductor have been used to investigate the properties of base-pairing transition. And also UV spectra contributed to the melting point in RNA are compared with the dynamic properties in NMR singnals, which is fitted by the computed spectra showing that there is no need for any additional phyical mechanism to explain NMR positions.
Kim, Chul-Joong,Shin, Kwang-Soon,Kim, Won-Yong,Lim, Dong-Soo,Yoon, Seung-Kew,Park, Young-Min,Kim, Boo-Sung,Jang, Sung-Key,Cho, Myung-Je 충남대학교 생물공학연구소 1996 생물공학연구지 Vol.4 No.-
Comparative nucleotide sequence studies of the genomes of hepatitis C virus (HCV) revealed that there are at least 6 different genotypes of HCV. The prevalence of HCV genotypes among the patients with liver diseases in Korea was investigated using the polymerase chain reaction (PCR) for the NS5 region. In the 75 HCV RNA positive samples, two genotypes, type 1b and type 2a, were the major causative agents which accounted for 60% and 33% of infections respectively, while 7% could not be assigned a genotype by the methods used. The nucleotide sequences of cDNAs encoding the putative envelope proteins from 10 type 1b and 5 type 2a genotype samples were analyzed. Approximately 31-42% of the nucleotide sequences of type 1b samples examined differed from those of different genotypes. In the case of type 2a samples, 36-42% of the nucleotide sequences differed from those of different genotypes. The diversities of the amino acid sequences were the same or greater than those of the nucleotide sequences. Two hypervariable regions (HVR1 and HVR2) were recognized in both HCV genomes of genotypes 1b and 2a. However, the sequence divergence within the HVR2 region of genotype 2a was less than that of genotype 1b. ⓒ 1995Wiley-Liss, Inc.
Growth-Inhibiting Effects of Herb Plants on Human Intestinal Bacteria
Kim, Moo-Key,Park, Byeoung-Soo,Kim, Byung-Su,Lee, Hoi-Seon 한국응용생명화학회 2001 Journal of Applied Biological Chemistry (J. Appl. Vol.44 No.4
Essential oils of 21 herb plant samples, using spectrophotometric and paper disc agar diffusion methods under anaerobic conditions, were tested in vitro for their growth-inhibiting activities against Bifidobacterium bifidum, B. longum, Lactobacillus casei, Clostridium perfringens, and Escherichia coli. The responses varied with bacterial strains and plant oils. At 10 mg/disk, all essential oils did not inhibit beneficial intestinal bacteria, except for the oil of Alpinia officinarum and Melaleuca alternifolia against L. casei. Due to their strong growth-inhibitory activities against C. perfringens, E. coli, and L. casei, the activites of nine oils were evaluated at low concentrations. In test with C. perfringens at 1 mg/disk, the oils of Amyris balsamifera, Curcuma longa, M. alternifolia, and Trachyspermum ammi showed moderate activities. Moderate activities against E. coli were observed with the oils of M. alternifolia and T. ammi. These results may be indications of at least one of the pharmacological actions of the four herb plants.
Kim, Yong-Il,Im, Hyung-Jun,Paeng, Jin Chul,Lee, Jae Sung,Eo, Jae Seon,Kim, Dong Hyun,Kim, Euishin E.,Kang, Keon Wook,Chung, June-Key,Lee, Dong Soo The Korea Society of Nuclear Medicine 2012 핵의학 분자영상 Vol.46 No.4
Purpose $^{18}F$-FP-CIT positron emission tomography (PET) is an effective imaging for dopamine transporters. In usual clinical practice, $^{18}F$-FP-CIT PET is analyzed visually or quantified using manual delineation of a volume of interest (VOI) for the striatum. In this study, we suggested and validated two simple quantitative methods based on automatic VOI delineation using statistical probabilistic anatomical mapping (SPAM) and isocontour margin setting. Methods Seventy-five $^{18}F$-FP-CIT PET images acquired in routine clinical practice were used for this study. A study-specific image template was made and the subject images were normalized to the template. Afterwards, uptakes in the striatal regions and cerebellum were quantified using probabilistic VOI based on SPAM. A quantitative parameter, $Q_{SPAM}$, was calculated to simulate binding potential. Additionally, the functional volume of each striatal region and its uptake were measured in automatically delineated VOI using isocontour margin setting. Uptake-volume product ($Q_{UVP}$) was calculated for each striatal region. $Q_{SPAM}$ and $Q_{UVP}$ were compared with visual grading and the influence of cerebral atrophy on the measurements was tested. Results Image analyses were successful in all the cases. Both the $Q_{SPAM}$ and $Q_{UVP}$ were significantly different according to visual grading (P<0.001). The agreements of $Q_{UVP}$ or $Q_{SPAM}$ with visual grading were slight to fair for the caudate nucleus (${\kappa}$=0.421 and 0.291, respectively) and good to perfect to the putamen (${\kappa}$=0.663 and 0.607, respectively). Also, $Q_{SPAM}$ and $Q_{UVP}$ had a significant correlation with each other (P<0.001). Cerebral atrophy made a significant difference in $Q_{SPAM}$ and $Q_{UVP}$ of the caudate nuclei regions with decreased $^{18}F$-FP-CIT uptake. Conclusion Simple quantitative measurements of $Q_{SPAM}$ and $Q_{UVP}$ showed acceptable agreement with visual grading. Although $Q_{SPAM}$ in some group may be influenced by cerebral atrophy, these simple methods are expected to be effective in the quantitative analysis of $^{18}F$-FP-CIT PET in usual clinical practice.