http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
녹차에 의한 알코올성 위염 예방 효과에 대한 분자 생물학적 기전
이정상 ( Lee Jeong Sang ),오태영 ( O Tae Yeong ),함기백 ( Ham Gi Baeg ),박수진 ( Park Su Jin ),송영준 ( Song Yeong Jun ),이은희 ( Lee Eun Hui ),이광재 ( Lee Gwang Jae ),유병무 ( Yu Byeong Mu ),김진홍 ( Kim Jin Hong ),김영경 ( Kim 대한소화기학회 2003 대한소화기학회 추계학술대회 Vol.2003 No.-
알코올성 위염은 임상에서 흔히 접하는 질환으로 알코올은 위에서 위염, 위궤양 및 위암의 원인으로 작용한다. 그런데 알코올성 위염은 알코올의 위점막 손상에 대한 정확한 분자 생물학적 규명이 되어 있지 못하고, 따라서 특이한 치료 방법이 없는 실정이다. 녹차 (Green Tea)는 falvonoid 중 가장 다양한 보호 효과가 규명되어 각종 염증 질환은 물론 암예방 물질로써 각광을 받고 있다. 이의 작용 기전으로는 항염증 작용, 암세포의 증식 억제 효과 및
이정상(Joung Sang Lee),엄영준(Young Jun Eom),정태형(Tae Hyong Chong) 한국생산제조학회 2007 한국생산제조시스템학회 학술발표대회 논문집 Vol.2007 No.10
Polyacetal plastic gears are widely used in the industrial machine elements and often operated about lm/s pitch line velocity. But there is not enough experiment and research being done in this velocity area. Through the fatigue test of polyacetal gears, we provide the basic test results and estimate the equation of fatigue life from the fatigue life curves. For estimating the equation of fatigue life, we performs the test on two operating conditions. One is not limits the temperature of tooth flank, the other is preserving the temperature of tooth flank under specific limit. As the result, how the temperature of tooth flank affects the failure and the fatigue life of poly acetal gear are shown and the Unit-load and K-factor are determined which are need in the design of polyacetal plastic gear.
만성신부전에서 염류코르티코이드 투여가 포타시움 평형과 요 암모늄 배설에 미치는 효과
한진석(Jin Suk Han),이정상(Jung Sang Lee),김강석(Kang Seock Kim),허우성(Woo Seong Huh),전은실(Un Sil Jeon),이서진(Seo Jin Lee),주권욱(Kwon Wook Joo),김성권(Suhnggwon Kim),진호준(Ho Jun Chin),조윤숙(Yun Suk Cho) 대한신장학회 2000 Kidney Research and Clinical Practice Vol.19 No.2
N/A Mineralocorticoids influences on acid-base homeo-stasis by the regulation of urine acidification. But its mechanism of acion is not well known in human. This study compared the acid-base status and the indices of urine acidification before and after mineralocorticoid administration in human, and analyzed the effect of mineralocorticoids on human acid-base homeostasis. We administered 9a-fludrocortisone in 6 chronic renal failure patients and 6 normal controls 0.5mg daily for 7 days. The results were as following ' 1) After administration of 9a-fludrocortisone in patients group, serum aldosterone level changed from 120.2±71.0pg/mL to 44.8±32.2pg/mL(mean±SD, p< 0.05). Serum HCO- level was not changed. Urine ammonium excretion was incresed from 24.6±12.3 mmol/day to 43.7±19.0(p<0.05), but there were no change in urine pH and urine anion gap, Serum potassium level decreased from 5.5±0.7mBq/L to 4.1±0.5mEq/L(p<0.05), and TTKG increased from 3.9 to 8.9(p<0.05). 2) After administration of 9a-fludrocortisone in control group, serum aldosterone level changed from 99.7±44.5pg/mL to 25.1±3 mL(p<0.05). Serum HCO- level was not changed. Urine ammonium ex-cretion was incresed from 44.3±21.6mmoVday to 76.3±19.6(p<0.05), but there were no change in urine pH and urine anion gap. Serum potassium level decreased from 4.8±0.5mEq/L to 3.9±0.2mHq/L(p< 0.05), but there was no change in TTKG. 3) No patient or control showed any discomfort after 9-fludrocortisoneadministration, and there was no elevation in diastolic blood pressure, increase in body weight, electrolyte abnormality. In summary, after 9α-fludrocortisane administration, urinary ammonium excretion increased in both patients and control group, and this phenomenon occured with correction of hyperkalemia without urine pH change. This result implies urinary ammonium excretion increase by mineralocorticoid. In human increase in renal distal acidification by mineralocorticoid is due to increase in renal ammo- niagenesis rather than stimulation on proton excretion.
김형호(Hyoung-Ho Kim),박준길(Jun-Gil Park),서상호(Sang-Ho Suh),이정상(Jeong-Sang Lee),최재성(Jae-Sung Choi) 대한기계학회 2011 대한기계학회 춘추학술대회 Vol.2011 No.4
협착이 발생된 관상동맥의 치료를 위해 외과적인 수술방법으로는 이식우회로술이 많이 사용된다. 이식우회로술 시술 시 개존률 향상을 위해서는 최적의 혈관 문합 시술에 대한 연구가 필요하다. 본 연구의 목적은 γ-grafting bypass와 T-graft ing bypass 시술의 효과를 분석하는 것이다. 이를 위해 기하학적 형상을 최적화하고 각각의 기하학적 형상에 대해 혈류역학적 특성을 비교분석하였다. 이 연구를 위해 유한체적법을 기반으로 하는 상용코드를 이용하여 시뮬레이션을 수행하였다. Bypass anastomosis is frequently adopted for surgical treatments in stenosed coronary artery. Optimal coronary bypass grafting should be investigated to improve the patency for the arterial bypass techniques. The objective of this study is to analyze the effects of the Y-grafting bypasses and T-grafting bypasses. In order to find the optimal geometric configuration, the hemodynamic characteristics are obtained and compared with each other for different geometries. The study is performed with a general-purpose CFD code, which is based on the finite volume discretization.