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Pt계 촉매를 이용한 직접 개미산 연료전지의 특성 연구
유재근,이효송,김진용,김기호,이영우 충남대학교 공업교육연구소 2005 論文集 Vol.27 No.1
Direct Formic Acid Fuel Cells (DFAFCs) are potential alternative power sources for potable devices such as cellular phones, personal digital assistants (PDA) and laptop computers. In this study, we investigated the effect of the anode catalysts on the performance of direct formic acid fuel cell. We made the Pt-Pd catalysts using deposition method for the investigation of the fuel cell performance as a change of temperature and oxidant. Fuel cell with Pt-Pd anode catalyst showed the performance of 120 mW/㎠at room temperature. This result was much higher value than that of Pt-Ru catalyst which showed the best performance of commercial catalyst in our previous works. For this reason, we can conclude that the Pt-Pd catalyst is an excellent material for the oxidation of formic acid.
백병준,유명상,신재민,김효진,박훈,김장묵,오천환 순천향의학연구소 2003 Journal of Soonchunhyang Medical Science Vol.9 No.2
Background and Objectives : Paranasal sinus cancer is rare when compared with cancers of other sites. Because paranasal sinus is anatomically located adjacent to the orbit and skull base, it is difficult to remove the tumor completely with tumor free margin in advanced paranasal sinus cancer. This report was conducted to investigate clinical characteristics, histologic type and treatment outcome of paranasal sinus cancer. Material and Methods : Twenty-six cases with paranasal sinus cancer diagnosed at the Department of otolaryngology-Head and Neck Surgery, Soonchunhyang Cheonan Hospital from January 1991 to September 2000 were studied by chart review, telephone interview and letters retrospectively. Results : The male to female ratio was 4.2 : 1. Most patients were 6th and 7th decade. The maxillary sinus was the most commonly affected site(61.5%), followed by the ethmoid sinus(34.6%). The most common histologic type of malignancy was squamous cell carcinoma(57.6%), followed by adenocarcinoma(19.2%). Most patients presented with T_(3)/T_(4) or locally advanced disease, N_(0)(91.3%), and M_(0)(100%) Sixtynine pertcent of this study group underwent sugery as part of a mutimodality curative treatment plan or alone as curative treatment. Eighteen patients(69.2%) developed recurrent disease at a median time of 278 days after initial treatment. Kaplan-Meier analysis revealed the 5-year disease specific survival was 34.6%. Conclusion : Most patients with paranasal sinus cancer presented with locally advanced disease. Adanced T stage was highly predictive of poor prognosis. Recurrence rate was high and mostly occured within the second year after treatment.
Yu, Hyo Jae,Kim, Jin-Koo The Korean Society of Fisheries and Aquatic Scienc 2016 Fisheries and Aquatic Sciences Vol.19 No.4
The osteological development in Sebastes koreanus is described and illustrated on the basis of 32 larvae [6.11-11.10 mm body length (BL)] and a single juvenile (18.60 mm BL) collected from the Yellow Sea. The first-ossified skeletal elements, which are related to feeding, swimming, and respiration, appear in larvae of 6.27 mm BL; these include the jaw bones, palatine, opercular, hyoid arch, and pectoral girdle. All skeletal elements are fully ossified in the juvenile observed in the study. Ossification of the neurocranium started in the frontal, pterotic, and parietal regions at 6.27 mm BL, and then in the parasphenoid and basioccipital regions at 8.17 mm BL. The vertebrae had started to ossify at ~7.17 mm BL, and their ossification was nearly complete at 11.10 mm BL. In the juvenile, although ossification of the pectoral girdle was fully complete, the fusion of the scapula and uppermost radial had not yet occurred. Thus, the scapula and uppermost radial fuse during or after the juvenile stage. The five hypurals in the caudal skeleton were also fused to form three hypural elements. The osteological results are discussed from a functional viewpoint and in terms of the comparative osteological development in related species.
Yu, Hyo Jae,Kim, Jin-Koo The Korean Society of Fisheries and Aquatic Scienc 2014 Fisheries and Aquatic Sciences Vol.17 No.1
Using the criteria of previous study, we analyzed the morphological characters of 66 specimens of the Sebastes pachycephalus complex collected from Korea between 2008 and 2013. As a result, the 37 specimens were identified as Sebastes nudus, and the remaining specimens as Sebastes pachycephalus. Sebastes nudus is characterized by the absence of scales below the base of the dorsal fin spines; the absence of dark spots on the dorsal, anal, and caudal fins; and the presence of distinct yellow or brownish-red markings on the dorsum (when fresh). The most similar species S. pachycephalus differs from S. nudus in having minute scales below the base of the dorsal fin spines. We propose the new Korean name "Hwang-jeom-gae-bol-rak" for S. nudus, and redescribe S. pachycephalus.