http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
서지방호용 절연변압기 성능시험관련 모의해석 및 시험결과와의 비교분석
최영하(Choi Young-Ha),김명룡(Kim Myung-Young),이강원(Lee Kang-Won),온정근(Ohn Jung-Ghun),송중호(Song Joong-Ho) 한국철도학회 2003 한국철도학회 학술발표대회논문집 Vol.- No.-
"KRS 6330-3256라" standard regulates performance test of insulating transformer for protecting the electronic interlock linkage equipment which is being done by test procedures and methods according to the standard. The balance/unbalance test evaluating the performance of transformer are applied by impulse voltage(12/200㎲) but affected by many other factors. Therefore, the review about these is necessary to have the reliability and reappearance of test results. In this paper, we have simulated about several phenomenon appearing in real balance/unbalance test and compared simulated results with real ones. With the basis of these results, the influence to test result of inner and outer factors are investigated and analyzed and established the plan boosting the reliability and reappearance of test results.
신혈관성 고혈압쥐에서 Atrial Natriuretic Peptide가 혈관 기초장력에 미치는 영향
최석 ( Seok Choi ),김명룡 ( Myung Young Kim ),조남수 ( Nam Soo Cho ),선재명 ( Jae Myung Sun ),위희욱 ( Hee Wook Whi ),전제열 ( Jae Yeoul Jun ),윤평진 ( Pyung Jin Yoon ),정종훈 ( Jong Hoon Chung ),염철호 ( Cheol Ho Yeum ) 대한신장학회 2008 Kidney Research and Clinical Practice Vol.27 No.5
Purpose: Hypertension may be involved an alteration of intrinsic basal tone in vascular smooth muscle. The purpose of this study was to investigate the vasorelaxant effect of atrial natriuretic peptide (ANP) on isolated non-contracted aorta from two-kidney, one clip (2K1C) renovascular hypertensive rats. Methods: 2K1C hypertension was induced by clipping the left renal artery and were used 6 weeks later. Age-matched rats receiving a sham treatment, which served as controls. The thoracic aortae were mounted in tissue baths to measure the isometric tension. Results: ANP diminished basal tone in previously unstimulated thoracic aortic rings from 2K1C hypertensive rats, while it had no effect in the control rats. Endothelial destruction potentiated the vasorelaxant effect of ANP on basal tone in 2K1C rats. A similar potentiation of the ANP response was observed by pre-treatment with Nω-nitro-L-arginine methyl ester (L-NAME) or methylene blue in aortic rings with endothelium. Treatment with calcium-free Krebs decreased basal tone and abolished ANP-response. These effects were observed only in aortic rings from 2K1C rats. Similarly, staurosporine and calphostin C, inhibitors of protein kinase C (PKC), lowered basal tone and abolished ANP-response in hypertensive rats. Conclusion: These results demonstrate that ANP has a vasorelaxant effect on basal tone in 2K1C renovascular hypertension. Inhibition of ANP effects on basal tone by calcium-free Krebs and PKC antagonists suggests that altered Ca2+-active tone is involved in hypertension, that modifies the response of vascular smooth muscle to the ANP.