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대동맥 이첨판과 승모판 이탈증을 동반한 대동맥 판하부 협착 1예
김용화,장경식,양태영,임영국,안기완,홍순표 朝鮮大學校 附設 醫學硏究所 1993 The Medical Journal of Chosun University Vol.18 No.1
Discrete subaortic stenosis is a rare cardiac disorder especially in Orientals which occupies eight to ten percent of aortic stenosis, It occurs mainly before age of eighteen and accompanies with aortic valve abnormalities such as aortic stenosis, supravalvrlar stenosis, bicuspid valve and muscular hypertrophic subaortic stenosis, and other cardiac abnormalities such as ventricular septal defect, pulmonary stenosis and coarctation of aorta. There is no report of discrete subaortic stenosis accompanied with mitral valve prolapse. The major complications of discrete subaortic stenosis are aortic insufficiency, and subacute bacterial endocarditis. We report a case of asymptomatic nineteen-year-old male of discrete subaotic stenosis with bicuspid aortic valve and mitral valve prolapse, which is comfirmed by two-dimensional and Doppler echocardiography including transesophaigeal echocardiography.
정규성,조기섭,정재용,조영호,민영돈,박찬국,김만우 조선대학교 1994 The Medical Journal of Chosun University Vol.19 No.1
Double pyrolus, one of the relatively rare anomalies of the gastrointestinal tract, is a fistulous communication between the gastric antrum and the duodenal bulb. The first case of a double Pylorus was reported in 1969 by Smith, since then several cases have been reported. Recently, as the frequency of examining upper gastrointestinal series and endoscopy increases, it occurs more frequently and a few cases have been described in our country. According to the reports previously published, it resulted only from cysts, diverticla, atresia, band, membrane malformation of the pylorus, however, it might be also caused by penetration, complication of peptic ulcer. We report a case of double pylorus in a 67-year old man with prolonged administration of corticostetoids due to lumbago who has complained epigastric pain which was confirmed by endoscopy and biopsy.
간 낭종을 동반한 성인 다낭신 환자에서 간 낭종의 감염 1예
정규성,서정철,주기산,김원식,임영국,정종훈,문철웅 朝鮮大學校 附設 醫學硏究所 1993 The Medical Journal of Chosun University Vol.18 No.1
Adult polycystic kidney disease(APKD) usually accompanies with renal and extrarenal manifestations and liver cysts are present in aproximately 30% of patients with APKD. Kidney cysts often accompany with hemorrhage, rupture, infection, however, liver cysts are usually asymptomatic and do not impair liver function. Rare complication of liver cysts in patient with APKD include portal hypertension with bleeding esophageal varices and hepatic failure with encephalopathy. But, in APKD patient, infection of liver cysts without infection of renal cysts is extremely rare. We report a case of infected liver cyst in a patient with APKD who has complained generalized abdominal pain and high fever which was confirmed by ultrasound and aspiration. The patient was treated successfully with repeated aspiration and systemic antibiotics.
A Hierarchical Clustering Method Based on SVM for Real-time Gas Mixture Classification
Guk-Hee Kim,Young-Wung Kim,Sang-Jin Lee,Gi Joon Jeon 한국지능시스템학회 2010 한국지능시스템학회논문지 Vol.20 No.5
In this work we address the use of support vector machine (SVM) in the multi-class gas classification system. The objective is to classify single gases and their mixture with a semiconductor-type electronic nose. The SVM has some typical multi-class classification models; One vs. One (OVO) and One vs. All (OVA). However, studies on those models show weaknesses on calculation time, decision time and the reject region. We propose a hierarchical clustering method (HCM) based on the SVM for real-time gas mixture classification. Experimental results show that the proposed method has better performance than the typical multi-class systems based on the SVM, and that the proposed method can classify single gases and their mixture easily and fast in the embedded system compared with BP-MLP and Fuzzy ARTMAP.
Kim, JongMyeung,Ha, Jong Ryul,Oh, Se Woong,Kim, Hong Gi,Lee, Jin-Man,Lee, Dong Gun,Lee, Sang-Han,Kim, Jong Guk Pharmaceutical Society of Japan 2007 Biological & pharmaceutical bulletin Vol.30 No.3
<P>CW-270033, an injectable carbapenem, is a novel, synthesized pyrrolidinyl-thio carbapenem. In the present study, the <I>in-vitro</I> and <I>in-vivo</I> antibacterial activities of CW-270033 against wild-type strains and clinical isolates were compared with those of imipenem and meropenem. CW-270033 was more active than imipenem against Gram-negative (<I>Escherichia coli</I> and <I>Pseudomonas aeruginosa</I>) clinical isolates, but was slightly less active than meropenem. Against the Gram-positive clinical isolates methicillin-resistant <I>Staphylococcus aureus</I> (MRSA) and vancomycin-resistant <I>Enterococcus</I> (VRE), CW-270033 was slightly more active than meropenem, but was less active than imipenem. CW-270033 displayed potent <I>in-vivo</I> activity against<I> E. coli</I> ATCC 25922, <I>P. aeruginosa </I>ATCC 27853, and <I>S. aureus</I> S<SMALL>MITH</SMALL> in the mouse systemic infection model; the efficacy of CW-270033 in this model was 2—7 fold higher than that of meropenem. This activity was comparable to the <I>in-vitro</I> activity of CW-270033. An intravenous injection of CW-270033 showed that the half-life of CW-270033 in serum in mice was about 20 min, which was about two times that of meropenem. CW-270033 was also found to be resistant to hydrolysis by the mouse renal dehydropeptidase I (DHP-I) enzyme.</P>
Sliding Wear Behaviors of Steam Generator Tubes in Various Environments
Kim, Gyung Guk,Noh, Seung Dae,Park, Gi Sung,Kim, Seon Jin,Lee, Deok Hyun,Hur, Do Haeng,Choi, Myung Sik,Han, Jung Ho Trans Tech Publications, Ltd. 2006 Materials science forum Vol.510 No.-
<P>Wear damage of steam generator tubes for nuclear power plants can cause the leakage of radioactive substances. Therefore, the evaluation of integrity and safety for tubes is very important from the viewpoint of nuclear ecocide. In the present study, to investigate the wear properties of Inconel 600 and 690 steam generator tube materials mated with 409 stainless steel commonly used as support plate, sliding wear tests were performed with increasing sliding distance in air and in elevated temperature water environment, respectively. The wear volume of tube materials was less than those of supports under all conditions. There were no significant differences in the wear behavior for the Inconel 600 and 690 tubes, independently of the testing environment.</P>
A Hierarchical Clustering Method Based on SVM for Real-time Gas Mixture Classification
Kim, Guk-Hee,Kim, Young-Wung,Lee, Sang-Jin,Jeon, Gi-Joon Korean Institute of Intelligent Systems 2010 한국지능시스템학회논문지 Vol.20 No.5
In this work we address the use of support vector machine (SVM) in the multi-class gas classification system. The objective is to classify single gases and their mixture with a semiconductor-type electronic nose. The SVM has some typical multi-class classification models; One vs. One (OVO) and One vs. All (OVA). However, studies on those models show weaknesses on calculation time, decision time and the reject region. We propose a hierarchical clustering method (HCM) based on the SVM for real-time gas mixture classification. Experimental results show that the proposed method has better performance than the typical multi-class systems based on the SVM, and that the proposed method can classify single gases and their mixture easily and fast in the embedded system compared with BP-MLP and Fuzzy ARTMAP.
Kim, Byung Guk,Kim, Seon Mi,Cho, Chang Gi American Scientific Publishers 2015 Journal of Nanoscience and Nanotechnology Vol.15 No.2
<P>Multilayered composite proton exchange membranes were prepared by LbL method by alternating deposition of poly(diallyl dimethyl ammonium chloride) (PDDA) and highly sulfonated poly(phenylene oxide) (sPPO) onto the surface of Nafion 212. The sulfonated sPPO solution contained polystyrenesulfonic acid copolymer with azide moiety. Thickness of the LbL composite membrane was controlled by using the anionic solution of sPPO containing 0.5 M NaCl. The membranes were crosslinked by using UV to give the mechanical and chemical durability. The crosslinked composite membrane showed decreased methanol permeability with the increasing number of bilayers, and showed increased overall selectivity compared to Nafion film.</P>
Reduction of mitochondria derived superoxide by Mito-TEMPO improves the porcine oocyte maturation
Seul-Gi Yang,Hyo-Jin Park,Jin-Woo Kim,Min-Ji Kim,Ho-Guen Jegal,In-Su Kim,Min-Young Guk,Sun-Mi Park,Ji-Eun Lee,Deog-Bon Koo,Joung Jun Park 한국수정란이식학회 2018 한국수정란이식학회 학술대회 Vol.2018 No.11
In general, the shape of cumulus-oocyte-complexes (COCs) at germinal vesicle (GV) stage is important roles on meiotic maturation of porcine oocyte during in vitro maturation (IVM). Then, mitochondria produce reactive oxygen species (ROS) such as superoxide from electron transport system during oocyte maturation. ROS levels on oocytes are regulated by various antioxidant enzymes in cumulus cells (CCs). However, the effect of mitochondria derived superoxide production from CCs during IVM of porcine oocyte has not been reported. Firstly, we divided groups according to large number of CCs (Grade 1: G1) and small number of CCs (Grade 2: G2). Then, we counted cumulus cells of G1 and G2 oocyte by using haemocytometer. The oocyte maturation rate was significant decreased (p < 0.05) in G2 oocytes than that of G1 oocytes. We measured mitochondria derived superoxide in G1 and G2 COCs by using Mito-SOX staining. Mitochondrial superoxide was higher in G2 COCs than G1 COCs. Then, the mRNA expression levels of antioxidant enzymes (SOD1, SOD2 and PRDX3) in G2 COCs were decreased compared to G1 COCs. To reduce mitochondria derived superoxide, we used Mito-TEMPO as mitochondrial superoxide scavenger. Oocyte maturation rates in both G1 and G2 groups treated with Mito-TEMPO were increased than that of non-treated groups. Mitochondrial superoxide was lower in G1 and G2 groups treated with Mito-TEMPO than that of non-treatment groups. The mRNA expression levels of antioxidant enzymes in G1 and G2 COCs treated with Mito-TEMPO were increased compared to non-treated groups. Based on these findings, we suggest that reduction of mitochondria derived superoxide by Mito-TEMPO assists maturation competence in porcine oocytes.
( Jong Guk Lim ),( Gi Young Kim ),( Chang Yeun Mo ),( Kyoung Min Oh ),( Geon Seob Kim ),( Hyeon Chae Yoo ),( Hyeon Heui Ham ),( Young Tae Kim ),( Seong Min Kim ),( Moon S. Kim ) 한국농업기계학회 2017 바이오시스템공학 Vol.42 No.4
Purpose: This study was conducted to discriminate between normal hulled barley and Fusarium (Fusarium asiaticum and Fusarium graminearum) infected hulled barley by using the near-infrared spectroscopy (NIRS) technique. Methods: Fusarium asiaticum and Fusarium graminearum were artificially inoculated in hulled barley and the reflectance spectrum of the barley spike was obtained by using a near-infrared spectral sensor with wavelength band in the range 1,175-2,170 nm. After obtaining the spectrum of the specimen, the hulled barley was cultivated in a greenhouse and visually inspected for infections. Results: From a partial least squares discriminant analysis (PLS-DA) prediction model developed from the raw spectrum data of the hulled barley, the discrimination accuracy for the normal and infected hulled barley was 99.82% (563/564) and 100% (672/672), respectively. Conclusions: NIRS is effective as a quick and nondestructive method to detect whether hulled barley has been infected with Fusarium. Further, it expected that NIRS will be able to detect Fusarium infections in other grains as well.