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박영배,이영우,김종환,박재형,최윤식,오병희,서정돈,주승재,전은석 대한내과학회 1987 대한내과학회지 Vol.32 No.2
Cardic involvement in neurofibromatosis is uncommon, but congenital heart disease, especially pulmonary stenosis, is often observed. Both pulmonary stencsis and cafe-au-lait spots can ccc~ur in the Leopard syndrome, the Watson syndrome, and neurofibromatosis. We report a case of pulmonary valvular and infundibular stenosis associated with neurofibromatosis in a 30-year-old male.
Sphingosylphosphorylcholine induces proinflammatory signaling via activation of mast cells in skin
( Hyeong Rae Kim ),( Dae Kyoung Choi ),( Kyung Cheol Sohn ),( Myung Im ),( Young Lee ),( Chang Deok Kim ),( Jeung Hoon Lee ),( Young Joon Seo ),( Ji Hye Park ),( Chong Won Choi ),( Ga Young Lee ),( So 대한피부과학회 2012 대한피부과학회 학술발표대회집 Vol.64 No.3
태생기 단백영양결핍 백서의 산화스트레스 및 항산화 방어체계
이종호,이홍규,김성연,박경수,전현정,조은영,박형규,김숙경 대한당뇨병학회 2001 Diabetes and Metabolism Journal Vol.25 No.3
Background: Free radical-mediated oxidative damage has been implicated in a variety of pathological processes such as diabetes mellitus, aging and atherosclerosis. The susceptibility of a given organism to oxidative damage is influenced by the overall balance between the degree of oxidative stress and antioxidative capabilities. Nutrition plays an important role in determining the cellular antioxidative defense mechanism. Thus, the aim of this study is to investigate the effects of fetal protein malnutrition on oxidative stress and antioxidative capabilities. Method: Rats were fed a low-protein (8% casein) diet throughout pregnancy and lactation. Male offspring were weaned onto either a control (18% casein) diet (group 2) or a low-protein diet (group 3). Offspring from rats fed a control diet were weaned onto a control diet (group 1). The activities of superoxide dismutase (SOD), glutathione peroxidase (GPx) and the concentration of thiobarbituric acidreactive substances (TEARS) were determined at 10 and 15 wk in liver and skeletal muscle from offspring. Results: SOD activities of liver in group 3 were significantly lower than those in group 1 at 10 wk (4.14±0.65 U/mg protein, 9.09±0.85 U/mg protein) and 15 wk (4.18±0.58 U/mg protein, 7.63±0.74 U/mg protein), respectively. But SOD activities of skeletal muscle were not different between groups. Whilst GPx activities of liver were not different at 10 wk, GPx activities in group 2 (1.80±0.16 U/mg protein) were significant higher than those in group 1 (1.24±0.15 U/mg protein) at 15 wk. GPx activities of skeletal muscle were not different between groups. The TBARS concentrations in liver or skeletal muscle were not different between groups at 10 and 15 wk. There was a significant negative correlation between SOD activities and TBARS concentrations in liver (r=-0.359). Conclusion: In offspring of rats fed a low-protein diet throughout pregnancy and lactation, the antioxidant enzyme activities were significantly decreased, compared with offspring of rats fed a control diet. These alterations were not fully restored in low-protein offspring even when weaned onto a control diet. These results suggest that fetal protein malnutrition impair the antioxidative defense system.
Where to go for the development of high-performance H2 storage materials at ambient conditions?
Soon Hyeong So,Sae Jin Sung,Seung Jae Yang,Chong Rae Park 대한금속·재료학회 2023 ELECTRONIC MATERIALS LETTERS Vol.19 No.1
Hydrogen is expected to overcome energy resource depletion because it is the most abundant element in the universe andbecause an ideal hydrogen energy cycle has the potential to exploit energy infi nitely. Conventionally, hydrogen storageutilizes compression under high pressure (350–700 bar) into a tank and liquefaction in the cryotemperature regime (20 K). To mitigate the impractical operating conditions researchers have conducted adsorption-dependent research to increase thespecifi c surface area (SSA) in physisorption and to decrease the H 2 binding energy in chemisorption. Nevertheless, thesestrategies are still unlikely to reach the required the U.S. Department of Energy (DOE) targets. To this end, researchers havetried to fi nd hydrogen storage material to fi t the H 2 binding energy between the physisorption region and chemisorptionregion. Previous governing parameters, the SSA, and the H 2 binding energy show no correlation to gravimetric H 2 storagecapacity (GHSC). In addition, no correlation between the H 2 densifi cation index (HDI) and the H 2 binding energy is found aswell, which means the latter cannot describe the H 2 -adsorbent interaction thoroughly. The several notable fi ndings presentedhere suggest that the development of high-performance H 2 storage materials can be realized through the optimal modulationof an underlying parameter that dominates the H 2 -adsorbent interaction. This paper highlights the necessity of research onwhat the underlying parameter that dominates the H 2 -adsorbent interaction is and on how it aff ects GHSC to develop H 2storage materials that meet the DOE targets.