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Hirota, Noriaki; Takeda, Kiyoko*; Tachibana, Yukio; Masaki, Yasuhiro*
Zairyo To Kankyo, 70(3), p.68 - 76, 2021/03
Corrosion resistance of stainless steels and Ni-based alloys were evaluated in a sulfuric acid decomposition gas at high temperature. The evaluation were carried out in an environment simulated in the sulfuric acid decomposition reaction vessel for thermochemical hydrogen production process (IS process). Their corrosion films were also analyzed for better understanding of the corrosion behavior. As a result, after 100 hour corrosion test, Ni-based alloy containing 2.4% Si showed good corrosion resistance. Ferritic stainless steel containing 3% Al (3Al-Ferrite) showed better corrosion resistance. Its corrosion rate was lower than that of SiC (0.1mm/year), which is a candidate material for the sulfuric acid decomposition reaction vessel. On the other hand, Ni-based alloy pre-filmed with Al
O
is prepared as the relative corrosion film of 3Al-Ferrite. Its corrosion rate was significantly higher than that of 3Al-Ferrite. As the result of EPMA analysis of these oxide films, Ni-based alloy containing 2.4% Si formed Si oxide film which had some cracks after the long term corrosion test. Therefore S penetrated into grain boundaries of the matrix through the oxide film. 3Al-Ferrite formed a thin and uniform AlO film, and the penetration of S into the grain boundaries was not observed. AlO pre-film of Ni-based alloy also showed S penetration in the matrix because the AlO pre-film had many small defects originally. The corrosion oxide film of 3Al-Ferrite consisted of only 
-AlO, while the AlO pre-film consist of -AlO and 
-AlO. Those results suggest that the better corrosion resistance of 3Al-Ferrite is due to the uniform formation of dense -AlO film at the early stage of the corrosion.
with 
under high salt conditions using the ion beam mutation breedingMaruyama, Yudai*; Takeda, Kiyoko*; Tomooka, Norihiko*; Sato, Katsuya; Ono, Yutaka; Yokoyama, Tadashi*
JAEA-Review 2015-022, JAEA Takasaki Annual Report 2014, P. 99, 2016/02
sp. ME121, isolated from soil as a mixed single colony with 
sp. 32KFujinami, Shun*; Takeda, Kiyoko*; Onodera, Takefumi*; Sato, Katsuya; Shimizu, Tetsu*; Wakabayashi, Yu*; Narumi, Issey*; Nakamura, Akira*; Ito, Masahiro*
Genome Announcements (Internet), 3(5), p.e01005-15_1 - e01005-15_2, 2015/09
USDA110 generated by ion-beam irradiationTakeda, Kiyoko*; Sato, Katsuya; Narumi, Issey*; Ono, Yutaka; Otsu, Naoko*; Yokoyama, Tadashi*
JAEA-Review 2014-050, JAEA Takasaki Annual Report 2013, P. 120, 2015/03
sp. strain TCA20, isolated from a hot spring containing a high concentration of calcium ionsFujinami, Shun*; Takeda, Kiyoko*; Onodera, Takefumi*; Sato, Katsuya; Sano, Motohiko*; Takahashi, Yuka*; Narumi, Issey*; Ito, Masahiro*
Genome Announcements (Internet), 2(5), p.e00866-14_1 - e00866-14_2, 2014/09
sp. strain TS-2, isolated from a jumping spiderFujinami, Shun*; Takeda, Kiyoko*; Onodera, Takefumi*; Sato, Katsuya; Sano, Motohiko*; Narumi, Issey*; Ito, Masahiro*
Genome Announcements (Internet), 2(3), p.e00458-14_1 - e00458-14_2, 2014/05
Sato, Katsuya; Onodera, Takefumi*; Takeda, Kiyoko; Narumi, Issey*
JAEA-Review 2013-059, JAEA Takasaki Annual Report 2012, P. 110, 2014/03
USDA110 generated by ion-beam irradiationTakeda, Kiyoko; Sato, Katsuya; Narumi, Issey*; Otsu, Naoko*; Yokoyama, Tadashi*
JAEA-Review 2013-059, JAEA Takasaki Annual Report 2012, P. 114, 2014/03
sp. strain TS-1Fujinami, Shun*; Takeda, Kiyoko; Onodera, Takefumi*; Sato, Katsuya; Sano, Motohiko*; Narumi, Issey*; Ito, Masahiro*
Genome Announcements (Internet), 1(6), P. e01043-13, 2013/12
USDA110 generated by ion-beam irradiationTakeda, Kiyoko; Tejima, Kohei*; Sato, Katsuya; Narumi, Issei; Yokoyama, Tadashi*
JAEA-Review 2012-046, JAEA Takasaki Annual Report 2011, P. 107, 2013/01
-sterilization of biofertilizer's carrier on bacterial inoculants survivalTejima, Kohei*; Yokoyama, Tadashi*; Sato, Katsuya; Takeda, Kiyoko; Narumi, Issei
JAEA-Review 2012-046, JAEA Takasaki Annual Report 2011, P. 112, 2013/01
-sterilization of carrier materials made with different types of soils on the shelf life of biofertilizer containing strain USDA110Tejima, Kohei; Sato, Katsuya; Takeda, Kiyoko; Yokoyama, Tadashi*; Narumi, Issei
Radioisotopes, 61(4), p.161 - 171, 2012/04
A biofertilizer is a substance that holds beneficial microorganisms for plant growth in a carrier material. To demonstrate the effect of -sterilization, the survival of the was monitored to assess the shelf life of biofertilizers. As biofertilizer carriers, five kinds of typical Japanese soil-based materials were used. Following the sterilization of carrier materials by -irradiation or autoclaving, 
was inoculated into each material. The biofertilizer was stored for 12 months at 4
C or 30C. After storage, viable inoculants in the biofertilizer were enumerated. Results indicated that inoculant density after storage was greater than the initial density in biofertilizers made from sterilized carriers, whereas it decreased significantly in biofertilizers made from non-sterilized carriers. -sterilization was superior to autoclave sterilization in enhancing inoculant survival in some cases.
USDA 110 obtained by ion-beam microbial mutation-breeding technologyTakeda, Kiyoko; Tejima, Kohei; Sato, Katsuya; Narumi, Issei; Yokoyama, Tadashi*
JAEA-Review 2011-043, JAEA Takasaki Annual Report 2010, P. 110, 2012/01
USDA 110 into a high temperature tolerant strain in terms of ion-beam microbial mutation-breeding technologyTakeda, Kiyoko*; Tejima, Kohei; Sato, Katsuya; Narumi, Issei; Yokoyama, Tadashi*
JAEA-Review 2010-065, JAEA Takasaki Annual Report 2009, P. 75, 2011/01
Takeda, Kiyoko*; Tejima, Kohei; Sato, Katsuya; Narumi, Issei; Yokoyama, Tadashi*
no journal, ,
no abstracts in English
USDA110 into a high temperature tolerant strain in terms of ion-beam microbial mutation-breeding technologyTakeda, Kiyoko*; Tejima, Kohei; Sato, Katsuya; Narumi, Issei; Yokoyama, Tadashi*
no journal, ,
no abstracts in English
Yokoyama, Tadashi*; Takeda, Kiyoko*; Tejima, Kohei; Sato, Katsuya; Narumi, Issei
no journal, ,
no abstracts in English
USDA 110 into a high temperature tolerant strain as a more applicable inoculant for biofertilizers in terms of ion-beam microbial mutation-breeding technologyYokoyama, Tadashi*; Takeda, Kiyoko; Tejima, Kohei; Sato, Katsuya; Narumi, Issei
no journal, ,
no abstracts in English
generated by carbon ion beam irradiationTakeda, Kiyoko; Tejima, Kohei; Sato, Katsuya; Narumi, Issei; Yokoyama, Tadashi*
no journal, ,
no abstracts in English
-sterilization of biofertilizer's carrier on bacterial inoculants survivalTejima, Kohei; Yokoyama, Tadashi*; Sato, Katsuya; Takeda, Kiyoko; Narumi, Issei
no journal, ,
Biofertilizer is a substance that holds beneficial microorganism for plant growth (e.g. Rhizobia) in the carrier such as peat, perlite, charcoal and soil. To use biofertilizer more efficiently, it is necessary to keep the amount of viable inoculants in the biofertilizer for a definite period of time. The inoculants survival in the biofertilizer could be affected by the physical and chemical properties of carrier materials and by the competition with native microorganisms in the carrier. -irradiation is expected to sterilize the carrier materials without changes in physical and chemical properties. In an effort to demonstrate the advantage of -sterilization, the survivals of inoculants were monitored to assess the shelf life of biofertilizer.
