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조서인 ( Se In Cho ),허권 ( Kweon Heo ) 강원대학교 농업생명과학연구원(구 농업과학연구소) 2009 강원 농업생명환경연구 Vol.21 No.-
This survey was carried out to investigate the flora of Mt. Durueng and Palbong at Hongcheon. Vascular plants surveyed were consisted of 228 taxa, i.e., 164 species, 3 subspecies, 49 varieties, and 12 formae. Korean endemic plants were Eleutherococcus divaricatus var. chiisanensis, Cirsium setidens, Carpinus turczaninovii, Vicia chosenensis, and Asperula lasiantha. Also, the conservatory plants classified from first grade to fifth grade were distributed 39 taxa in the Mt. Durueng and Palbong. Among them, Gastrodia elata Blume and Epimedium koreanum Nakai were investigated as rare plants. The naturalized plants were found four species.
표면 니켈 조성에 따른 팔라듐-니켈-은 합금 수소분리막의 수소투과선택 특성
임다솔(Da-Sol Lim),김세홍(Se-Hong Kim),김도희(Do-Hui Kim),조서현(Seo-Hyun Cho),김동원(Dong-Won Kim) 한국표면공학회 2018 한국표면공학회지 Vol.51 No.5
In this study, Pd-Ni-Ag alloy hydrogen separation membranes were fabricated by Pd/Ag/Pd/Ni/Pd multilayer sputter deposition on the modified MIM(Metal Injection Molding)-PSS(Porous Stainless Steel) support and followed heat treatment. Nickel, used as an alloying element in Pd alloy membranes, is inexpensive and stable material in a hydrogen isotope environment at high temperature up to 1123 K. Hydrogen permselectivity of Pd-Ni-Ag alloy membranes is affected not only by composition of membrane films but also by other factors such as surface properties of PSS support, microstructure of membrane films and inter-diffused impurities from PSS support. In order to clarify the effect of surface Ni composition on hydrogen permselectivity of Pd-Ni-Ag alloy membranes, the other effects were significantly minimized by the formation of dense and homogeneous Pd-Ni-Ag alloy membranes. Hydrogen permeation test showed that hydrogen permeability decreased from 7.6 × 10<SUP>-09</SUP> to 1.02 × 10<SUP>-09</SUP> mol/m·s·Pa<SUP>0.5</SUP> as Ni composition increased from 0 to 16 wt% and the selectivity for H₂/N₂ was infinite.