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Molecular Beam Epitaxy of Phosphorus-Doped ZnS
Kunio Ichino,Hiroshi Yoshida,Takashi Kawai,Hiroyuki Matsumoto 한국물리학회 2008 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.53 No.5
We have grown phosphorus-acceptor-doped ZnS by molecular beam epitaxy. Two sources of phosphorus (P), i.e., GaP and Zn3P2, were used and compared. The ZnS:P epitaxial layers grown using GaP exhibited acceptor-related emission in the low-temperature photoluminescence spectra while the layers grown using Zn3P2 did not show distinct acceptor-related emission. Secondary ion mass spectroscopy revealed, however, that the phosphorus concentration was much higher in the ZnS:P layers grown using Zn3P2. These different behaviors between the two P sources seem to originate from the difference in the molecular species.
( Yasukazu Ichino ) 한국국제경제학회 2015 한국국제경제학회 동계학술대회 Vol.2015 No.-
We present an evolutionary model of cultural change to investigate how interna-tional trade helps "cosmopolitan culture," which is a mixture of local cultures, toprevail. We find that there is a stable stationary state in which both cosmopolitan culture and local culture coexist in a trading country. We interpret this as a theoretical reproduction of what we typically observe: cultural diversity within a country and cultural similarity between countries. However, this result is dependent on a way how parents transmit their cultural type to their children. When parents have perfect empathy to their children, local culture may go extinct due to international trade.
Surface Modification on Titanium Substrate for Osteoconductive Properties
Ryoichi Ichino,Kensuke Kuroda,Masazumi Okido 한국표면공학회 2010 한국표면공학회 학술발표회 초록집 Vol.2010 No.11
Many kinds of surface modification by wet processes for osteoconductive properties were performed on Ti substrate. Hydroxyapatite, titania, and carbonate apatite ceramics are coated on Ti substrate. Composite coatings with them or with collagen were also coated on Ti substrate. HAp coatings with different morphology were fabricated by wet processes, and those with needle-like morphology had the highest osteoconductivity by in vivo evaluation among the HAp coated Ti samples. The osteoconductivity also improved by adding effective amount of collagen in the HAp coatings. Titania coatings prepared by anodizing also had good osteoconductivities.
6. 일본산 맥류에 생기는 Fusarium 의 독성 균주
일호정승 한국균학회 1982 韓國菌學會誌 Vol.10 No.4
A survey was made of wheat and barley in Japan for the occurrence of toxigenic strains of Fusarium and of mycotoxins produced in culture by these strains. The following 11 species of Fusarium were found: F. acuminatum, F. avenaceum, F. equiseti, F. graminearum, F. moniliforme, F. oxysporum, F. poae, F. semitectum, F. solani, F. sorotrichioides, and F. tricinctum. The species most commonly isolated from barley grain was F. graimnearum while F. equiseti was consistently isolated from barley. The predominant species in wheat grain was F. poae while F. graminearum, F. avenaceum, and F. oxysporum were also isolated frequently. Cultures on autoclaved rice of all the Fusarium strains were analyzed for the presence of trichothecene-mycotoxins and zearalenone. The following trichothecenes were detected in the strains examined: Nivalenol and deoxynivalenol in F. graminearum; diacetoxyscirpenol, neosolaniol and nivalenol in F. equiseti and F. semitectum: T-2 toxin, HT-2 toxin, diacetoxyscirpenol and neosolaniol in F. acuminatum and F. sporotrichioides. Culture material of all the strains were assayed for toxicity by injection to 4-day-old chicken embryo. Some strains of F. acuminatum, F. sporotrichioides, F. equiseti and F. semitectum proved to be acutely toxic to chicken embryo. One-hundred isolates of Fusarium were tested for their ability to produce zearalenone on autoclaved rice. The following species produced zearalenone: F. graminearum, F. equiseti and F. semitectum.
Inui, Tomoyuki,Ichino, Kotaro,Matsuoka, Isao,Takeguchi, Tatsuya,Iwamoto, Shinji,Pu, Shu Bin,Nishimoto, Sei-ichi 한국화학공학회 1997 Korean Journal of Chemical Engineering Vol.14 No.6
Development in highly active catalysts for the reforming of methane with CO₂and partial oxidation of methane was conducted to produce hydrogen and carbon monoxide with high reaction rates. An Ni-based four-components catalyst, Ni-Ce₂O₃-Pt-Rh, supported on an alumina wash-coated ceramic fiber in a plate shape was suitable for the objective reaction. By combining the catalytic combustion of ethane or propane, methane conversion was markedly enhanced, and a high space-time yield of syngas, 25,000 ㏖/ℓ·h was obtained at a catalyst temperature of 700℃ or furnace temperature of 500℃. The extraordinary high space-time yield of syngas was also confirmed even under the very rapid flow rate conditions as a contact time of 3 m-sec by using a monolithic shape of catalyst bed without back pressure.
( Tomoyuki Inui ),( Kotaro Ichino ),( Isao Matsuoka ),( Tatsuya Takeguchi ),( Shinji Iwamoto ),( Shu Bin Pu ),( Sei Ichi Nishimoto ) 한국화학공학회 1997 Korean Journal of Chemical Engineering Vol.14 No.6
Development in highly active catalysts for the reforming of methane with CO₂and partial oxidation of methane was conducted to produce hydrogen and carbon monoxide with high reaction rates. An Ni-based four-components catalyst, Ni-Ce₂O₃-Pt-Rh, supported on an alumina wash-coated ceramic fiber in a plate shape was suitable for the objective reaction. By combining the catalytic combustion of ethane or propane, methane conversion was markedly enhanced, and a high space-time yield of syngas, 25,000 ㏖/ℓ·h was obtained at a catalyst temperature of 700℃ or furnace temperature of 500℃. The extraordinary high space-time yield of syngas was also confirmed even under the very rapid flow rate conditions as a contact time of 3 m-sec by using a monolithic shape of catalyst bed without back pressure.