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The effects of electrical shock on the expressions of aquaporin subunits in the rat spinal cords
Seong-Il Yeo,Hea Jin Ryu,Ji-Eun Kim,Wook Chun,Cheong Hoon Seo,Boung Chul Lee,Ihn-Geun Choi,Seung Hun Sheen,Tae-Cheon Kang 대한해부학회 2011 Anatomy & Cell Biology Vol.44 No.1
We analyzed aquaporin (AQP) expression in the rat spinal cord following an electrical shock (ES) to elucidate the roles of AQP in spinal cord injury (SCI) induced by an electrical burn. In control animals, AQP1 immunoreactivity was observed in the small diameter dorsal horn fibers of laminae I and II and in astrocytes and neurons in the spinal cord. Both AQP4 and AQP9 immunoreactivity were detected in astrocytes. One week after the ES, AQP1 immunoreactivity in dorsal horn fibers was downregulated to 83, 61, and 33% of control levels following a 1-, 4-, or 6-second ES, respectively. However, AQP1 immunoreactivity in ventral horn neurons increased to 1.3-, 1.5-, and 2.4-fold of control levels following a 1-, 4-, or 6-second ES, respectively. AQP4 immunoreactivity was upregulated after an ES in laminae I and II astrocytes in a stimulus-intensity independent manner. Unlike AQP1 and AQP4, AQP9 immunoreactivity was unaffected by the ES. These findings indicate that altered AQP immunoreactivity may be involved in SCI following an ES.
다합금계 백주철의 탄화물 및 기지조직이 내마모성에 미치는 영향
류성곤,Ryu, Seong-Geun 한국재료학회 1997 한국재료학회지 Vol.7 No.4
The effects of carbide and matrix structures on the abrasion wear resistance of multi-component white cast irons with 3.0 mass%C have been studied in this paper. Four different heats were poured in order to obtain the specimens with different combinations of the carbide structures: a basic iron(3.0 mass%C-5.0 mass%Cr-5.0 mass%V-5.0 mass% Mo-12.5mass%W)for M$_{6}$C and M$_{7}$C$_{3}$ carbides, and a Cr free iron(3.0 mass%C-5.0 mass%V-2.5mass%Mo-12.5 mass%W) for MC and M6C carbides. A conventional high Cr free free iron(3.0 mass%C-5.0 mass%V-2.5 mass%Mo-12.5 mass%W) for MC and M6C carbides. A conventional high Cr white cast iron was also poured to compare its wear resistance with those of the multi-component white cast irons. In the as-cast condition, the range of abrasive wear rate(Rw=mg/min) was from 4.15 to 5.98 . The lowest Rw, which means the highest wear resistance, was obtained in the basic iron with nodular MC, lamellar M$_{2}$C and cellular M$_{7}$C$_{3}$ carbides. On the other hand, the Rw of the high Cr white cast iron ranked between the basic iron and the Mo and W free iron. In each alloy, the Rw of air hardened or tempered specimen was lower than that of the as-cast one because of the change of matrix structures by the heat treatments. The Rw of the hear treated speci-mens increased in the order Mo and W free iron, basic iron, Cr free iron, high Cr iron, and V free iron.n.n.n.
택견 품밟기 유형에 따른 운동학적 변인과 지면반력 차이 분석
오성근 ( Seong Geun Oh ),류지선 ( Ji Seon Ryu ) 한국운동역학회 2010 한국운동역학회지 Vol.20 No.1
Korean traditional martial arts Taekkyon has a unique stepping method, Poombalbki. The purpose of this study was to investigate kinematic factors and ground reaction forces on two types of Poombalbki, one of which use knee bending and the other use chiefly hip bending. Six male taekkyoners who are the students of Y University participated in this study. Positions and velocities of CoM, the elapsed times of each phase, angles and angular velocities of low limb joints, and GRFs were analyzed for this study. The results were as follows; CoMs of whole body, trunk, and head were more posteriorly positioned in performing hip bending Poombalbki than knee bending one. Horizontal velocities of those were slower in performing hip bending Poombalbki. A player stayed more shortly within range of his opponent in performing hip bending Poombalbki. The vertical and horizontal components of GRF of forward-stepping foot were smaller in performing hip bending Poombalbki(p<.05). In conclusion hip bending is useful strategy, because A player is farther from his opponent, he stayed more shortly within range of his opponent, and the smaller weight is loaded on his front foot in performing hip bending Poombalbki than knee bending one.
( Byung Geun Kim ),( Myung Hwan Noh ),( Choong Heon Ryu ),( Hwa Seong Nam ),( Su Mi Woo ),( Seung Hee Ryu ),( Jin Seok Jang ),( Jong Hun Lee ),( Seok Ryeol Choi ),( Byeong Ho Park2 ) 대한내과학회 2013 The Korean Journal of Internal Medicine Vol.28 No.3
Background/Aims: The bedside index of severity in acute pancreatitis (BISAP) is a new, convenient, prognostic multifactorial scoring system. As more data are needed before clinical application, we compared BISAP, the serum procalcitonin PCT), and other multifactorial scoring systems simultaneously. Methods: Fifty consecutive acute pancreatitis patients were enrolled prospectively. Blood samples were obtained at admission and after 48 hours and imaging studies were performed within 48 hours of admission. The BISAP score was compared with the serum PCT, Ranson`s score, and the acute physiology and chronic health examination (APACHE)-II, Glasgow, and Balthazar computed tomography severity index (BCTSI) scores. Acute pancreatitis was graded using the Atlanta criteria. The predictive accuracy of the scoring systems was measured using the area under the receiver-operating curve (AUC). Results: The accuracy of BISAP (≥ 2) at predicting severe acute pancreatitis was 84% and was superior to the serum PCT (≥ 3.29 ng/mL, 76%) which was similar to the APACHE-II score. The best cutoff value of BISAP was 2 (AUC, 0.873; 95% con- fidence interval, 0.770 to 0.976; p < 0.001). In logistic regression analysis, BISAP had greater statistical significance than serum PCT. Conclusions: BISAP is more accurate for predicting the severity of acute pancreatitis than the serum PCT, APACHE-II, Glasgow, and BCTSI scores.
이성훈 ( Seong Hun Lee ),김태오 ( Tae Oh Kim ),황상연 ( Sang Youn Hwang ),류동엽 ( Dong Yup Ryu ),이동현 ( Dong Hyun Lee ),박원일 ( Won Il Park ),김광하 ( Gwang Ha Kim ),허정 ( Jeong Heo ),강대환 ( Dae Hwan Kang ),송근암 ( Geun A 대한소화기학회 2006 대한소화기학회지 Vol.48 No.3
Rectal schwannoma is a rare mesenchymal tumor originating from Schwann`s cell. We experienced a 61-year-old female patient who complained of blood tinged and narrow calibered stool for several years, and found a 4 cm sized submucosal tumor with a central ulcer on the rectal wall during colonoscopy. She underwent transanal excision. Microscopically, the tumor was composed of fasciculating bundles of spindle cells with benign nuclear atypia and peripheral lymphoid cell cuffing. Tumor cells showed a diffuse strong immunoreactivity to S-100 protein, but not stain for CD 34, desmin and smooth muscle actin. This is the first case report of rectal schwannoma in Korea. (Korean J Gastroenterol 2006;48:195-199)
Mallory-Weiss syndrome의 내시경적 진단과 치료
송근암(Geun Am Song),김태오(Tae Oh Kim),강대환(Dae Hwan Kang),조몽(Mong Cho),양웅석(Ung Suk Yang),배상문(Sang Moon Bae),류수형(Soo Hyung Ryu),안준협(Jun hyup An),이성훈(Seong Hwun Lee) 대한내과학회 2000 대한내과학회지 Vol.58 No.5
N/A Background : Mallory-Weiss syndrome is a laceration of gastroesophageal junction due to abruptly increased intraabdominal pressure. Bleeding from Mallory-Weiss tears stops spontaneously within 2-3 days without specific therapy in 80-90% of cases, but in some cases, aggressive treatment is required due to massive bleeding. Methods: Among two hundreds and fifteen cases of upper gastrointestinal bleeding from January 1997 to January 1999, twenty three cases (10.7%) were diagnosed as Mallory-Weiss syndrome by endoscopy. We assessed the site, number, coexisting diseases, precipitating factors and bleeding lesion according to the time interval after the tears. After supportive care or specific therapy, we performed follow-up endoscopy to evaluate the healing of the lesions. Results: The mean age was 49.1 years and male:female ratio was 4.8:1. The most common precipitating factors were nausea, vomiting and alcohol drinking. In twenty cases, coexisting diseases such as gastritis and esophageal varix were detected. As for the number of tears, one tear was the most common (69.6%), while two tears were identified in five cases and three were in two cases. Thirteen cases of the Mallory-Weiss tears were located on the gastroesophageal junction, seven cases on the lower esophagus, one case on the cardia and two cases from lower esophagus to cardia. Eighteen cases were diagnosed by endoscopy within 24 hours after bleeding, of whom fourteen cases had active bleeding. Among four cases diagnosed after 24 hours, endoscopic finding revealed active bleeding in two cases and blood clots in the other two cases. We treated thirteen cases with supportive care, one case with hypertonic saline injection and nine cases who had active bleeding or deep and long tears with endoscopic band ligation. One or two weeks later, we performed follow-up endoscopy, and no bleeding was detected in all cases. Conclusion: We diagnosed twenty three cases of Mallory-Weiss syndrome by endoscopy and treated all cases with supportive care or endoscopic band ligation successfully.(Korean J Med 58:542-547, 2000)
유근창(Geun Chang Ryu),박현주(Hyun Ju Park),성정섭(Jeong Sub Seong),김재민(Jae Min Kim) 한국안광학회 2000 한국안광학회지 Vol.5 No.1
To describe the prevalence of binocular anomalies in adult Koreans. Patients included were 19 to 40 years of age, 41 males and 60 females and living in Kwang-Ju Korea. Refractive correction was estimated objectively with an autorefractometer and subjectively refined without cycloplegia. Myopia was defined as a refractive error less than -0.50 diopters hyperopia was defined as a refractive error greater than +0.50 diopters. 101 no strabismic patients who had a refractive error and a near lateral phoria(46%) and an AC/A(accommodative convergence / accommodation) anomaly ( 50.4 % ) . The prevalence of a near vergence anomaly ( 52.5 % ) was higher than a near divergence anomaly ( 55.5% ) . The prevalence of a positive relative accommodation ( PRA ) anomaly (61.4%) was higher than a negative relative accommodation(NRA) anomaly(54.5%). According to Morgan`s analysis method, patients with vergence anomaly(21.7%) were seen slightly less frequently than those with accommodative interaction anomaly(29.7%). 34.6% of patients had both vergence anomaly and accommodative interaction anomaly. These results indicate that full prescription for a refractive corrections should be considered as these can improve binocular visual function for ametropia.