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H. Asaoka,T. Yamazaki,S. Shamoto 한국물리학회 2008 Current Applied Physics Vol.8 No.3,4
We have focused on the stress evolution during initial growth stage of Ge nanodots on H-terminated Si(111) 1×1 and Si(111) 7×7corresponding to a StranskiKrastanow growth mode, when the wetting layer thickness approaches the critical value for three-dimen-sional nucleation. In case of the deposition on H-terminated Si(111) 1×1 surface, the rst Ge sub-bilayer shows tensile stress followedby compressive stress. The unique behavior demonstrates the important role of one atomic layer of H termination to control the intrinsicstress for nanodot fabrication.
Phthalate Levels in Beverages in Japan and Korea
Yano, K.,Hirosawa, N.,Sakamoto, Y.,Katayama, H.,Moriguchi, T.,Joung, K. E.,Sheen, Y. Y.,Asaoka, K. 梨花女子大學校 藥學硏究所 2002 藥學硏究論文集 Vol.- No.11
Considerable number of endocrine disruptors (7 compounds) are known today (Japan Environmental Agency, 1998). Among them, phthalates are considered to be in most abundance in our environment. The production of phthalates in Japan was 474 thousand tones in 1998 (Kasozai Kogyo Kai, 1999), around 56% of which was di(2-ethylhexyl)phthalate (DEHP) uesd mainly as plasticizers in polyvinyl chloride (PVC) production, is widely used in PVC, nitrocellulose polyvinyl acetate, painting inks, adhesives and lacquers. PVC contains up to 40% phthalates by weight wuthout covalently binding to other ingredients in the PVC(Needham et al., 2000). Thus, significant amounts of DEHP and DBP are easily released from the plastics into the environment during production, used and disposal, resulting in the pollution of food air, water, soil and homes.