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함준수(Joon Soo Hahm),이동후(Dong Hoo Lee),박경남(Kyung Nam Park),이민호(Min Ho Lee),이종철(Jong Chul Rhee),기춘석(Choon Suck Kee),유대현(Dae Hyun Yoo) 대한소화기학회 1989 대한소화기학회지 Vol.21 No.2
N/A Gastric emptying time(GET) is influenced by several factors, such as neura), hormonal and composi- tion and physiochemical properties of food. The patients with delayed GET have some upper gastrointestinal symptoms such as recurrent nausea, vomiting, postprandia! Bloating, anorexia, and iveight loss. And also, almost of acute hepatitis and a part of chronic ]iver disease patients have similar symptoms of the patients with delayed GET. Therefore We performed GET measurement in liver disease patients to identify the relationship between nonspecific upper gastrointestinal symp- toms and gastric emptying function. The resu]ts are as followings; 1) Total ]iver disease patients are 28 in number, composed of acute hepatitis 3, chronic hepatitis 18, liver cirrhosis 7. 2) The GET(T1/2) of liver disease patients was delayed significantly than that of the normal volunteers. (Mean+SE;120.8+6.6 vs 89.4+5.9 mins.) 3) The GET of the symptomatic patients (N = 20 ) ivas 128.3+6.8 mins (Mean+SE), and that of the asymptomatic patients (N =8) was 101.8+13.2 mins. The symptomatic patients have delayed GET in 10 patients and asymptomatic patients have delayed GET in 3. 4) The GET of the patients who have elevated serum transaminase level higher than twice of normal is delayed significantly than that of the patients who have serum transaminase level lower than twice of normal. (Mean+SE; 143.4+2.6 vs 110.0+7.4 mins.)
하민수,이상현,이상호 한국스포츠리서치 2003 한국 스포츠 리서치 Vol.20 No.1
The purpose of this study was to compared the magnitude of excess post-oxygen consumption(EPOC) following resistance exercise(1-RM of 60%) and aerobic exercise(VO₂ max of 60%). The subjects of study were consisted of each ten trained and untrained male college students(19.7±2.3, 19.3±0.5 years). This study was designed to compare the magnitude of EPOC following two exercise types. For both exercise types, resistance and aerobic exercise was energy consumption of total 300㎉ during exercise(untrained aerobic & resistance 298.6±2.9, 297.8±2.1㎉ ; trained aerobic & resistance 299.6±2.6, 295.7±4.1㎉). The dependant variables in this study consisted of three parts, metabolic variables (VO₂, RER, rectal temperature, lactic acid), EPOC and total energy consumption after exercise. To compare the difference of metabolic variables rest, during exercise and recovery period of each groups, 2×2 combined design two-way ANOVA was used. 2×2×2 combined design three-way ANOVA were used for compare the metabolic variables rest, during exercise and recovery period between groups. EPOC and total energy consumption during recovery period was used one-way ANOVA. The statistical significance was set at 0.05. The results were obtained as following, first, VO₂ during recovery of each groups was higher significantly than the rest(both group; until 5 min, p<0.05). RER was decreased significantly in both untrain and train group(p<0.05). Rectal temperature(RT) and lactic acid concentration was higher significantly than the rest in each group(p<0.05). Second, the difference of exercise types was statistically significant among two groups. Finally, result of EPOC and total energy consumption was higher significantly trained group than untrained group in after aerobic exercise(p<0.05). However, resistance exercise was not statistically significant between groups, but the value was higher trained group. The results suggest that EPOC follow aerobic exercise higher the resistance exercise, thus exercise prescription for weight loss and fat oxidation following exercise include aerobic exercise. However resistance exercise is recommended, because fat oxidation ratio was higher during recovery period by resistance exercise.
치과주조용 Ti-Zr-Cr계 합금에서 Cr 함량변화가 부식저항성에 미치는 영향
박영준,강후원,이용렬,송호준,김민강 大韓齒科器材學會 2004 대한치과재료학회지 Vol.31 No.4
The purpose of this study was to develop new dental casting titanium (Ti) alloys having an excellent mechanical properties and good corrosion resistance as a substitute for c.p Ti and Ti-6Al-4V alloy (control groups). Ti-20Cr, Ti-2OZr and Ti-20Zr-XCr (X=2, 5, 10, 15) alloys (experimental groups) were designed for dental casting Ti alloys. Prior to casting prccedure, mother alloys were prepared by using vacuum arc melting with skull melting method. Argon-arc melting and argon/vacuum-pressure casting machine were used for making the specimens. The hardness, microstructure, and corrosion resistance were evaluated by using Vickers microhardness measurement, FE-SEM, and anodic polarization test. The results were as follows: 1. The Vickers microhardness (Hv) of Ti and Ti-6Al-4V alloy showed the values of 210 and 352, and Ti-20Cr and Ti-20Zr alloys showed the values of 341 and 259, respectively. As the Cr content increased from 0 to 15 % in Ti-20Zr-XCr (X=0, 2, 5, 10, 15) alloys, the Hv increased from 259 to 298, 457, 344, and 351, respectively. The microstructure of Ti-20Zr-XCr specimens showed significant difference by the concentration changes of Cr content showing acicular crystalline structure for Ti-20Zr-2Cr and Ti-20Zr-5Cr, and equiaxed crystalline structure for Ti-20Zr-10Cr and Ti-20Zr-15Cr. 2. Open-circuit potentials (E_(∝)) were rapidly decreased followed by steadiness as time elapse in all experimental groups except in Ti-20Z group. Ti-2OZr group showed an increase in E_(∝), from the first. 3. In potentiodynamic anodic polarization tests, all experimental groups showed more noble corrosion potential (E_(corr) than that of Ti-6Al-4V, and more basic E_(corr) than that of Ti. Especially, Ti-20Zr-10Cr alloy showed most favorable corrosion resistance among Ti-Zr-Cr alloys. 4. For Ti-20Zr-10Cr, Ti-20Zr-15Cr, and Ti-20Cr groups, which have more than 10% Cr content, the secondary corrosion potential shifted to noble direction in larger amounts than in the cases of control and other experimental groups. From these results, it was concluded that newly formulated Ti-20Zr-10Cr experimental alloy have adequate hardness and high corrosion resistance, and this alloy is promising candidate for a successful dental casting alloy.
유사체액에서의 전기화학적 처리가 티타늄 표면의 인산갈슘 흡착에 미치는 영향
조국현,김문영,송광엽,배태성,이민호 大韓齒科器材學會 2002 대한치과재료학회지 Vol.29 No.3
This study was performed to examine the effect of electrochemical treatment on the precipitation of apatite-like calcium phosphate in a simulated body fluid. Titanium plates of 20×20×1 ㎣ in dimensions were polished sequentially from #600 to #2,000 emery paper and one surface of each specimen was received an additional polishing sequence through 0.1㎛ alumina paste. To improve the bioactivity of titanium plates, they were electrochemically treated at 100 mA for 20 min in an electrolyte containing the calcium and phosphate ions, and the Hanks' solution with pH 7.4 at 36.5℃ for 30 days, and the surfaces were examined with X-ray diffractometer(XRD), scanning electron microscope(SEM) and X-ray photoemission spectroscopy(XPS). Precipitation of calcium phosphate and CaO were observed on the electrochemically treated titanium surface in a simulated body fluid after treatment at 600℃. Precipitation of calcium phosphate was densified and coarsened with increasing the temperature of the electrolyte solution in the range of 20-80℃. The calcium phosphate contained phosphate in the form of Po₄^3-, HPO₄^2-, and H₂PO₄^-.
췌장 외분비 기능검사로서 내시경적 췌관 내 세프레틴 검사 (Intraductal Secretin Test)의 유용성
한동수,이민호,최호순,윤병철,이동후,손주현,조윤주,함준수,전용철,기춘석,박경남,박일규 대한소화기내시경학회 2000 Clinical Endoscopy Vol.21 No.3
Background/Aims: The duodenal intubation test (duodenal secretin test; DST) is now considered the 'gold standard' test of exocrine pancreatic function in detecting exocrine pancreatic dysfunction in patients witd chronic pancreatitis. However, the DST has not been widely used, because it is time-consuming, invasive, and labor-intensive. On the other hand, intraductal secretin test (IDST) with endoscopic retrograde cannulation cf the main pancreatic duct has been showed similar diagnostic efficiency compared with DST. We assessed the clinical usefulness of IDST and investigated parameters for assessing impaired pancreatic function of IDST. Methods: Pure pancreatic juices were collected from 12 patients with chronic pancreatitis by endoscopic cannulation after a bolus intravenous injection of secretin 100 U, for 15min in three 5-min intervals. Five parameters of IDST were measured, and the sensitivity, specificity, and accuracy of IDST evaluated compared with ERP. Results: When we regarded mean-l.5 SD as the lower limits of IDST, the diagnostic sensitivity, specificity, and accuracy of five parameters to detect chronic pancreatitis were 91.7-100%, 75-87.5%, and 85-90%, respectively. Among five parameters, pancreatic juice secretory volume, bicarbonate concentration, and amylase output showed the highest diagnostic accuracy, followed by lipase output and bicarbonate output. A 10-min collection showed as much information as a 15-min collection. Conclusions: 10-min intraductal secretin test is useful as the conventional exocrine pancreatic function test in detecting exocrine pancreatic dysfunction in patients with chronic pancreatitis and the most discriminatory parameters are pancreatic juice secretory volume, bicarbonate concentration, and amylase output.