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Journal Articles

Improvement of symbiotic performance of ${it Sinorhizobium}$ with ${it Vigna marina}$ under high salt conditions using the ion beam mutation breeding

Maruyama, Yudai*; Takeda, Kiyoko*; Tomooka, Norihiko*; Sato, Katsuya; Ono, Yutaka; Yokoyama, Tadashi*

JAEA-Review 2015-022, JAEA Takasaki Annual Report 2014, P. 99, 2016/02

Journal Articles

Addendum report of the JHPS expert committee on radiation protection of the lens of the eye, 2; When and how should the dosimetry of beta $$H_{rm p}$$(3) be made?

Akahane, Keiichi*; Iimoto, Takeshi*; Ichiji, Takeshi*; Iwai, Satoshi*; Oguchi, Hiroyuki*; Ono, Kazuko*; Kawaura, Chiyo*; Kurosawa, Tadahiro*; Tatsuzaki, Hideo*; Tsujimura, Norio; et al.

Hoken Butsuri, 50(4), p.257 - 261, 2015/12

In a mixed field of photon and beta radiations, the same dose assigned to skin is normally assigned to the dose to the lens of the eye as a conservative estimate of H$$_{p}$$(3). In exceptional cases that a very high beta dose might be imparted of the same order with the dose limit, however, the conservatively biased dose must be too limiting, and thereby an accurate estimate of beta $$H_{rm p}$$(3) is desirable. This article presents a practical proposal of when and how the dosimetry of beta $$H_{rm p}$$(3) should be made.

Journal Articles

Genome analysis of the high temperature tolerant mutant of ${it Bradyrhizobium japonicum}$ USDA110 generated by ion-beam irradiation

Takeda, Kiyoko*; Sato, Katsuya; Narumi, Issey*; Ono, Yutaka; Otsu, Naoko*; Yokoyama, Tadashi*

JAEA-Review 2014-050, JAEA Takasaki Annual Report 2013, P. 120, 2015/03

Journal Articles

Interim report of the JHPS expert committee on radiation protection of the lens of the eye, 2; The Dosimetry method for the lens of the eye of workers in Japan

Akahane, Keiichi*; Iimoto, Takeshi*; Ichiji, Takeshi*; Iwai, Satoshi*; Oguchi, Hiroyuki*; Ono, Kazuko*; Kawaura, Chiyo*; Tatsuzaki, Hideo*; Tsujimura, Norio; Hamada, Nobuyuki*; et al.

Hoken Butsuri, 49(3), p.153 - 156, 2014/09

A brief review is given of the history and methodology of external dosimetry for the lens of the eye. Under the 1989 revision to domestic radiological protection regulations, the concept on the effective dose equivalent and the dose limit to the lens of the eye (150 mSv/y) both introduced in ICRP 1977 recommendations has changed nationwide the external monitoring methodology in non-uniform exposure situations to the trunk of a radiological worker. In such situations, often created by the presence of a protective apron, the worker is required to use at least two personal dosemeters, one worn on the trunk under the apron and the other, typically, at the collar over the apron. The latter dosemeter serves the dual purpose of providing the dose profile across the trunk for improved effective dose equivalent assessment and of estimating the dose to lens of the eye. The greater or appropriate value between $$H_{rm p}$$(10) and $$H_{rm p}$$(0.07), given by the dosemeter, is generally used as a surrogate of $$H_{rm p}$$(3).

Journal Articles

Identification of DNA mutation sites in a high temperature tolerant mutant of ${it Bradyrhizobium japonicum}$ USDA110 generated by ion-beam irradiation

Takeda, Kiyoko; Sato, Katsuya; Narumi, Issey*; Otsu, Naoko*; Yokoyama, Tadashi*

JAEA-Review 2013-059, JAEA Takasaki Annual Report 2012, P. 114, 2014/03

Journal Articles

Phenotypic characterization of high temperature tolerant mutants of ${it Bradyrhizobium japonicum}$ USDA110 generated by ion-beam irradiation

Takeda, Kiyoko; Tejima, Kohei*; Sato, Katsuya; Narumi, Issei; Yokoyama, Tadashi*

JAEA-Review 2012-046, JAEA Takasaki Annual Report 2011, P. 107, 2013/01

Journal Articles

The Effect of $$gamma$$-sterilization of biofertilizer's carrier on bacterial inoculants survival

Tejima, Kohei*; Yokoyama, Tadashi*; Sato, Katsuya; Takeda, Kiyoko; Narumi, Issei

JAEA-Review 2012-046, JAEA Takasaki Annual Report 2011, P. 112, 2013/01

Journal Articles

The Effect of $$gamma$$-sterilization of carrier materials made with different types of soils on the shelf life of biofertilizer containing ${it Bradyrhizobium japonicum}$ strain USDA110

Tejima, 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 $$gamma$$-sterilization, the survival of the ${it Bradyrhizobium japonicum}$ 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 $$gamma$$-irradiation or autoclaving, ${it B. japonicum}$ was inoculated into each material. The biofertilizer was stored for 12 months at 4$$^{circ}$$C or 30$$^{circ}$$C. 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. $$gamma$$-sterilization was superior to autoclave sterilization in enhancing inoculant survival in some cases.

Journal Articles

Colony morphology of high temperature tolerant mutants of ${it Bradyrhizobium japonicum}$ USDA 110 obtained by ion-beam microbial mutation-breeding technology

Takeda, Kiyoko; Tejima, Kohei; Sato, Katsuya; Narumi, Issei; Yokoyama, Tadashi*

JAEA-Review 2011-043, JAEA Takasaki Annual Report 2010, P. 110, 2012/01

Journal Articles

The Long-term storage of Rhizobial biofertilizer made from $$gamma$$-sterilized carriers

Tejima, Kohei; Yokoyama, Tadashi*; Sato, Katsuya; Narumi, Issei

JAEA-Review 2011-043, JAEA Takasaki Annual Report 2010, P. 114, 2012/01

Journal Articles

Phenotypic improvement of ${it Bradyrhizobium japonicum}$ USDA 110 into a high temperature tolerant strain in terms of ion-beam microbial mutation-breeding technology

Takeda, Kiyoko*; Tejima, Kohei; Sato, Katsuya; Narumi, Issei; Yokoyama, Tadashi*

JAEA-Review 2010-065, JAEA Takasaki Annual Report 2009, P. 75, 2011/01

Journal Articles

The Effect of $$gamma$$-sterilization of carrier materials on the shelf life of biofertilizer

Tejima, Kohei; Yokoyama, Tadashi*; Sato, Katsuya; Narumi, Issei

JAEA-Review 2010-065, JAEA Takasaki Annual Report 2009, P. 83, 2011/01

no abstracts in English

JAEA Reports

None

Yokoyama, Hiroomi*; Kanazawa, Toshio*; Fukuma, Tadashi*; Tamekiyo, Kozo*; Yanagida, Koji*; Furuya, Takashi*; Kono, Hiroshi*; Ito, Keiji*; Shirakura, Takao*; Kashiwara, Shinichiro*; et al.

PNC TN8410 87-086VOL2, 944 Pages, 1986/09

PNC-TN8410-87-086VOL2.pdf:32.16MB

JAEA Reports

Detailed design of new material nitric acid recovery evaporator

Yokoyama, Hiroomi*; Kanazawa, Toshio*; Fukuma, Tadashi*; Tamekiyo, Kozo*; Yanagida, Koji*; Furuya, Takashi*; Kono, Hiroshi*; Ito, Keiji*; Shirakura, Takao*; Kashiwara, Shinichiro*; et al.

PNC TN8410 87-086VOL1, 1037 Pages, 1986/09

PNC-TN8410-87-086VOL1.pdf:34.39MB

A detailed design for a New Material Nitric Acid Recovery Evaporator was carried out with a plan to use it to replace an already constructed stainless steel Nitric Acid Recovery Evaporator at the Power Reactor and Nuclear Fuel Development Corporation's Tokai Works. Most of the original Evaporator's conditions such as compliance with applicable laws, standards, structure, treatment performance and operating conditions were maintained when designing the new machine. The material is titanium with the addition of 5% tantalum. The Evaporator was designed with an operational life expectance of 10 years. We have calculated that the new Evaporator will have sufficient strength (including a seismatic design) and have the same evaporative performance as the already constructed one. During design, we referred to the results of already completed basic designs (Phase 1) of New Material Nitric Acid Recovery Evaporators, design and production of small-scale test equipment units, and the development of successful joints between different materials. We also considered manufacturing, installation, trial runs, maintenance, and the specifications for materials used for manufacturing, installation, piping and operation of the new Evaporator.

Oral presentation

Generation of high temperature tolerant mutants of soy beam rhizobium by carbon ion beam irradiation

Takeda, Kiyoko*; Tejima, Kohei; Sato, Katsuya; Narumi, Issei; Yokoyama, Tadashi*

no journal, , 

no abstracts in English

Oral presentation

The Advantage of $$gamma$$-irradiation of biofertilizer's carrier in bacterial inoculants survival

Tejima, Kohei; Yokoyama, Tadashi*; Sato, Katsuya; Narumi, Issei

no journal, , 

Biofertilizer is a substance that holds beneficial microorganism for plant growth (e.g. ${it Rhizobia}$) 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. $$gamma$$-irradiation is expected to sterilize the carrier materials without changes in physical and chemical properties. In an effort to demonstrate the advantage of $$gamma$$-sterilization, the survivals of inoculants were monitored to assess the shelf life of biofertilizer.

Oral presentation

Phenotypic improvement of ${it Bradyrhizobium japonicum}$ USDA110 into a high temperature tolerant strain in terms of ion-beam microbial mutation-breeding technology

Takeda, Kiyoko*; Tejima, Kohei; Sato, Katsuya; Narumi, Issei; Yokoyama, Tadashi*

no journal, , 

no abstracts in English

Oral presentation

Quantitative tracing of water-rock interactions by IR spectoroscopy; An Example of alkaline alteration of granitic rocks

Nakashima, Satoru*; Kirino, Yusuke*; Nishiyama, Naoki*; Tonoue, Ryota*; Yokoyama, Tadashi*; Nagasawa, Makoto*; Harui, Rika*; Walker, C.; Sasamoto, Hiroshi

no journal, , 

Cementitious grout material will be used to reduce groundwater inflow into the repository of high level radioactive waste. High pH solution derived from cementitious grout material may cause alteration of rock mass by grout-rock interactions. With regard to evaluation of radionuclide migration, it is important to evaluate the long-term behavior of rock mass affected by grout-rock interactions since such altered rock mass potentially affects on migration behavior (e.g., diffusion and sorption) of radionuclide. This study presents the results of identification for trace secondary minerals (alteration products) by (micro)infrared spectroscopy and determination of reaction rate constants of formation for secondary minerals.

Oral presentation

Generation of high temperature-tolerant mutants of soybean rhizobium strain USDA110 by ion beam microbial breeding

Yokoyama, Tadashi*; Takeda, Kiyoko*; Tejima, Kohei; Sato, Katsuya; Narumi, Issei

no journal, , 

no abstracts in English

Oral presentation

Effect of $$gamma$$-sterilization of carrier materials on the shelf life of biofertilizer

Tejima, Kohei; Sato, Katsuya; Narumi, Issei; Yokoyama, Tadashi*

no journal, , 

no abstracts in English

37 (Records 1-20 displayed on this page)