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알지오텐신 전환효소 유전자의 다향성이 소아의 일차성 신증후군에 미치는 영향
정해일(Hae Il Cheong),최용(Yong Choi),박혜원(Hye Won Park) 대한신장학회 2000 Kidney Research and Clinical Practice Vol.19 No.2
N/A Human angiotensin converting enzymcC4CE) gene displays an insertion/deletion polymorphism in 16 intron, and three genotypes are determined by presence or absence of a 287-bp fragment of DNA; II, ID and DD genotype. DD genotype has been suggested as a risk factor of various cardiovascular diseases and chronic nephropathies such as IgA nephropathy and diabetic nephropathy. This study was designed to investigate if the ACE polymor-phism is related to the clinical and pathologic findings of minimal change nephrotic syndrome(MCNS) and focal segmental glomerulosclerosis(FSGS) in children. Ninety children with primary nephrotic syndrome(MCNS and steroid responsive nephrotic syndrome : 68 cases, FSGS; 22 cases) and 97 healthy normal controls were examined. The genotype for the polymorphism was determined by PCR method. The distribution of ACE genotypes in primary nephrotic syndrome(II 28.6%, ID 53.8%, DD 17.6%) was not different from that in controls(II 39.2%, ID 41.2%, DD 29.6%). The IJ genotype was more frequent in FSGS(II 64.7%, ID 23.5%, I)D 11.8%) than in MCNS and steroid responsive nephrotic syndrome(I 20.3%, ID 60.8%, DD 18.9%, p<0.03). The ACE genotypes were not associated either with frequency of relapse in MCNS or steroid responsive nephrotic syndrome or with presence of hypertension, responsiveness to steroid therapy and progression of renal dysfunction in FSGS. We concluded that deletion polymorphism of ACE gene is not associated with increased risk for renal progression in children with primary nephrotic syndrome.
나선형 홈이 있는 브레이크 디스크의 열탄성불안정성에 대한 수치해석
정해일(Hae-Il Jung),최갑승(Kap-Seoung Choi),강일환(Il-Hwan Kang),왕학민(Hak-Min Wang),김형만(Hyung-Man Kim) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.5
The brake disc is the thermoelastic instability by the frictional heating during braking. In the present paper, the helical grooved vent brake disc is proved the thermoelastic instability by numerical analysis. The FEM analysis had been practiced for the comparisons of the thermoelastic instability and thermal deformation between the helical grooved vent brake disc and the conventional one.