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리프캐스팅 시 섬유 종류 및 약품 처리에 따른 보강 효과
한윤희(Yoonhee Han),이혜윤(Hyeyoon Lee),심규정(Kyujeong Sim),이제곤(Jegon Lee),윤혜정(Hye Jung Youn) 한국펄프·종이공학회 2018 펄프.종이기술 Vol.50 No.4
As paper documents or books were often damaged physically during the use and storage, they should be recovered to impart durability. Leaf casting is one of techniques to restore the damages, which fills the damaged parts of the paper by self-healing of fibers during the dewatering of fiber suspension on the suction table. In this study, the effects of pulp type and chemical spraying of the leaf casting process on the strengthening performance and the aging behavior were investigated. The pulp used for the leaf casting had effects on the apprearance, strength, and aging behavior. Compared to the spraying of methyl cellulose on the wet sheet, the spraying of methyl cellulose after drying is the most effective method for strengthening the paper. Even after 14-day aging, the paper had higher mechanical strength. The leaf casting could be applied to the papers with physical defects, and the strengthening effect could be improved by choosing a proper type of fiber and additional chemical spray treatment.
파열된 위장관 기질종양의 간 전이에 대한 동맥 색전술 치료
장서진 ( Seo Jin Jang ),권재현 ( Jae Hyun Kwon ),한윤희 ( Yoonhee Han ) 대한소화기학회 2018 대한소화기학회지 Vol.72 No.4
Gastrointestinal stromal tumors (GISTs) are the most common mesenchymal tumor of the gastrointestinal tract and occur most frequently in the stomach. The liver is the most common metastatic site of a GIST, and spontaneous rupture of the hepatic metastasis of a malignant gastric GIST is rare. We report the case of a 70-year-old man who presented with sudden right lower quadrant abdominal pain and was diagnosed with a spontaneously ruptured hepatic metastasis of a malignant gastric GIST. The patient was successfully managed with transcatheter arterial embolization of the hepatic artery. (Korean J Gastroenterol 2018;72:205-208)