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PET 필름기재의 구리 무전해도금에 있어서 초임계 CO<sub>2</sub> 유체가 도금 특성에 미치는 영향
이희대,김문선,김철경,Lee, Hee-Dai,Kim, Moon-Sun,Kim, Chul kyung 한국화학공학회 2007 Korean Chemical Engineering Research(HWAHAK KONGHA Vol. No.
In this study, electroless plating of copper was performed on PET film by using the blend of supercritical $CO_2$ and plating solution. The optimum volumetric ratio of supercritical fluid and plating solution was found to be 1:9 and dispersion property was poor at $CO_2$ vol% langer than 10%. Electroless plating of copper was best at $25^{\circ}C$ and 15 MPa. Role of added supercritical $CO_2$ is not to increase solubility but to disperse and maintain Cu-particles as the 1st particles. 본 연구는 $CO_2$ 초임계 유체를 도금액과 혼합하여 PET 필름 위에 무전해 구리도금을 실시하였으며 초임계 유체의 혼용조건에 따른 그 도금 효과를 비교하였다. 이산화탄소 초임계 유체와 도금액의 부피비는 1:9가 최적이였으며 초임계 유체가 10 vol% 이상이 되면 혼합액의 분산성이 불량해져 층분리가 발생하였다. 구리 무전해도금은 $25^{\circ}C$, 15 MPa 에서 수행된 구리막의 표면물성이 가장 균일하였다. 무전해 구리도금에서 도금액과 혼합시킨 초임계 유체의 역할은 단순히 용해도를 높여 주는 것이 아니라 도금막을 구성하는 구리입자를 1차 입자상태로 분산, 유지시킴을 확인하였다.
이상인(Sang In Lee),김기황(Ki Hwang Kim),남수연(Su Youn Nam),박효진(Hyo Jin Pack),이희대(Hee Dai Lee),정우희(Woo Hee Jung) 대한소화기학회 1993 대한소화기학회지 Vol.25 No.5
Although the greater omentum is frequently the site of metastatic neoplasm, primary omental tumors are exeedingly rare. The authors report here, a case of primary omental leiomyosarcoma presented initially as a palpable abdominal mass and epigastic discomfort for one year in a 66 year-old rnale patient. At laparotomy, 21*15*2.5 cm rnass weighing 600 gram was found in the omentum which was adherent to the anterior wall of the lower body of the stomach and liver surface. In the histologic findings presence of tumor necrosis, increased cellularity, cellular atypia and pleomorphism as well as large size of mass were indicative of leiomyosarcoma. Surg cal resection has been known to be the principle treatment for this disease, In this case, excision of the tumor with omentectomy, radical subtotal gastrectomy and wedge resection of the liver were performed. Eight months later, a recurrence was detected and chemotherapy with doxorubicin, dacarhazine, vincris- tine, and cyclophosphamide was done.
이인주 ( In Ju Lee ),최남용 ( Nam Yong Choi ),이희대 ( Hee Dai Lee ),김원석 ( Won Suk Kim ),서은주 ( Eun Ju Seo ) 대한외상학회 1988 大韓外傷學會誌 Vol.1 No.1
Necrotingzing fasciitis, a relatively rare but often fatal disease, was observed in two parients who sustained degloving injury in car accidents. Progression of necrosis and other clinical findings suggested necrotizing fasciitis. An open biopsy of skin and fascia established the diagnosis. Histologically, the lesion was characterzed by thrombosis of vessels, micro-abscess and focal necrosis of subcutaneous tissue and fascia with spar-ing of underlying muscle tissue at early phase. The causative organisms were Priteus and Pseudomonas in one case and Streptococcus, Enterococ-cus and Acinetobacter in the other case. The first case was effectively treated by repeated debridement and the second case needed amputa-tion as well as wide debridement-Both cases needed systemic antibiotic and fluid-electrolye correction.