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허우성 ( Woo Sung Heo ),이은경 ( Eun Kyoung Lee ),최세영 ( Sei Young Choi ) 한국고무학회 2009 엘라스토머 및 콤포지트 Vol.44 No.2
본 연구에서는 아스팔트가 가지는 단점을 보완하고자 아스팔트를 비이온 계면활성제(Span 80, Span 60, Tween 80, 및 Tween 60), 음이온 계면활성제(SLS), 및 양이온 계면활성제(Imidazole)를 변량 배합하여 반전유화법으로 아스팔트 에멀젼을 제조하였다. 유화아스팔트의 안정성을 규명하고자 입자크기, 점도, 제타전위, 및 내수성을 고찰하였다. 비이온 계면활성제와 음이온 계면활성제를 혼합 사용할 경우 유화아스팔트의 안정성은 우수하였으며 계면활성제의 양이 증가함에 따라 입자크기는 감소하였고, 반면에 점도와 제타전위 및 내수성은 증가하였다. In this study, asphalt emulsion was manufactured by phase inversion emulsification method with nonionic surfactants(Span 80, Span 60, Tween 80, and Tween 60), anionic surfactant(SLS) and cationic surfactant(Imidazole) in different feeding ratio to make up for the week points of asphalt. Its stabilization was carefully investigated with respect to droplet size, viscosity, zeta potential, and water-proofing property. When the surfactants mixed with nonionic and anionic surfactant were used into the asphalt, a stabilization of the asphalt emulsion was good. As the amount of the mixed surfactant was increased, the droplet size of asphalt emulsion were decreased, while the viscosity and zeta potential were increased. When the surfactants mixed with nonionic and anionic surfactant were used into the asphalt, a stabilization of asphalt emulsion was good.
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신장이식후 피부병변엾이 폐결절로 발현한 Kaposi 육종 1 예
김우진,허대석,한진석,김영환,이정상,김재열,서정욱,허우성 대한내과학회 1998 대한내과학회지 Vol.54 No.4
The incidence of Kaposi`s sarcoma increases in renal transplant patients who had immunosuppressive therapy. In Korea, 4 cases of Kaposi`s sarcoma in renal transplant patients have been reported. All of these cases had skin lesions. We experienced pulmonary Kaposi`s sarcoma in 25-year-old man proven by open lung biopsy, He had received cyclosporine and prednisolone as immunosuppressive agent for 8 months since renal transplantation. He admitted to the hospital because of fever and pulmonary nodules on chest X-ray, and he had no skin lesion. Sputum examinations were negative for microorganisms and malignancy. He had bloody and frothy secretions on bronchoscopic study, and BAI. fluid examinations were negative for microorganisms and malignancy. Open lung biopsy was carried out which showed Kaposi`s sarcoma nodules. Immunosuppressive agents were discontinued after diagnosis but pulmonay nodules progressed. He died of respiratory failure 10 days after diagnosis. Pulmonary Knnsi`s sarcoma has to be considered in the differential diagnosis in immunosuppresed patients who present with fever and pulmonary nodules.
ScienceON
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