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Journal Articles

Fe, Mn and $$^{238}$$U accumulations in ${it Phragmites australis}$ naturally growing at the mill tailings pond; Iron plaque formation possibly related to root-endophytic bacteria producing siderophores

Nakamoto, Yukihiro*; Doyama, Kohei*; Haruma, Toshikatsu*; Lu, X.*; Tanaka, Kazuya; Kozai, Naofumi; Fukuyama, Kenjin; Fukushima, Shigeru; Ohara, Yoshiyuki; Yamaji, Keiko*

Minerals (Internet), 11(12), p.1337_1 - 1337_17, 2021/12

Mine drainage is a vital water problem in the mining industry worldwide because of the heavy metal elements and low pH. Rhizofiltration using wetland plants is an appropriate method to remove heavy metals from the water via accumulation in the rhizosphere. ${it Phragmites australis}$ is one of the candidate plants for this method because of metal accumulation, forming iron plaque around the roots. At the study site, which was the mill tailings pond in the Ningyo-toge uranium mine, ${it P. australis}$ has been naturally growing since 1998. The results showed that ${it P. australis}$ accumulated Fe, Mn, and $$^{238}$$U in the nodal roots without/with iron plaque compared with other plant tissues. Among the 837 bacterial colonies isolated from nodal roots, 88.6% showed siderophore production activities. Considering iron plaque formation around ${it P. australis}$ roots, we hypothesized that microbial siderophores might influence iron plaque formation because bacterial siderophores have catechol-like functional groups. The complex of catechol or other phenolics with Fe was precipitated due to the networks between Fe and phenolic derivatives. The experiment using bacterial products of root endophytes, such as ${it Pseudomonas}$ spp. and ${it Rhizobium}$ spp., showed precipitation with Fe ions, and we confirmed that several ${it Ps.}$ spp. and ${it R.}$ spp. produced unidentified phenolic compounds. In conclusion, root-endophytic bacteria such as ${it Pseudomonas}$ spp. and ${it R.}$ spp., isolated from metal-accumulating roots of ${it P. australis}$, might influence iron plaque formation as the metal accumulation site. Iron plaque formation is related to tolerance in ${it P. australis}$, and ${it Ps.}$ spp. and ${it R.}$ spp. might indirectly contribute to tolerance.

Journal Articles

Electronic excitations in hole-doped La$$_{1-x}$$Sr$$_{x}$$MnO$$_{3}$$ studied by resonant inelastic X-ray scattering

Ishii, Kenji; Inami, Toshiya; Owada, Kenji; Kuzushita, Kaori; Mizuki, Junichiro; Murakami, Yoichi; Ishihara, Sumio*; Endo, Yasuo*; Maekawa, Sadamichi*; Hirota, Kazuma*; et al.

Journal of Physics and Chemistry of Solids, 66(12), p.2157 - 2162, 2005/12

 Times Cited Count:0 Percentile:0(Chemistry, Multidisciplinary)

We have studied electronic excitations of hole-doped manganese oxides La$$_{1-x}$$Sr$$_x$$MnO$$_3$$ ($$x=0.2$$ and $$0.4$$) by resonant inelastic X-ray scattering at Mn K absorption edge. We observed in the excitation spectra that the Mott gap of La$$_{0.6}$$Sr$$_{0.4}$$MnO$$_{3}$$ was filled by hole-doping. In La$$_{0.8}$$Sr$$_{0.2}$$MnO$$_{3}$$, which shows a metal-insulator transition, we found that temperature dependence of scattering intensity is different between two scattering vectors. It may reflects a anisotropic electronic structure which originates from the orbital degrees of freedom in manganese oxides.

Journal Articles

Resonant inelastic X-ray scattering study of the hole-doped manganites La$$_{1-x}$$Sr$$_x$$MnO$$_3$$ ($$x=0.2$$, $$0.4$$)

Ishii, Kenji; Inami, Toshiya; Owada, Kenji; Kuzushita, Kaori; Mizuki, Junichiro; Murakami, Yoichi; Ishihara, Sumio*; Endo, Yasuo*; Maekawa, Sadamichi*; Hirota, Kazuma*; et al.

Physical Review B, 70(22), p.224437_1 - 224437_6, 2004/12

 Times Cited Count:19 Percentile:65.81(Materials Science, Multidisciplinary)

Electronic excitations in the hole doped manganese oxides (La$$_{1-x}$$Sr$$_x$$MnO$$_3$$, $$x=0.2$$ and $$0.4$$) have been elucidated by using the resonant inelastic X-ray scattering (RIXS) method. A doping effect in the strongly correlated electron systems has been observed for the first time. The scattering spectra show that a salient peak appears in low energies indicating the persistence of the Mott gap. At the same time, the energy gap is partly filled by doping holes and the spectral weight energy shifts toward lower energies. The excitation spectra show little change in the momentum space as is in undoped LaMnO$$_3$$. On the other hand, the scattering intensities in the low energy excitations of $$x=0.2$$ are anisotropic in temperature dependence, which indicates an anisotropy of magnetic interaction and underlying effect of the orbital.

Journal Articles

Development of low carbon and boron added 22Mn-13Cr-9Ni-1Mo-0.24N steel (JK2LB) for jacket which undergoes Nb$$_{3}$$Sn heat treatment

Nakajima, Hideo; Hamada, Kazuya; Takano, Katsutoshi*; Okuno, Kiyoshi; Fujitsuna, Nobuyuki*

IEEE Transactions on Applied Superconductivity, 14(2), p.1145 - 1148, 2004/06

 Times Cited Count:30 Percentile:76.87(Engineering, Electrical & Electronic)

In ITER, the conductor for the Central Solenoid (CS) uses Incoloy 908, which requires special environment control to prevent cracks caused by Stress Accelerated Grain Boundary Oxidation (SAGBO) during Nb3Sn heat treatment. Use of a stainless steel jacket can simplify the design and fabrication because the special caution is not required for SAGBO. JAERI has already developed high manganese, JK2, whose thermal contraction from 300K to 4 K is almost the same as that of Incoloy: thus no change in the mechanical design of the CS is necessary. However, during the heat treatment, phosphorus enhances embrittlement of JK2. Carbon reduction and boron addition was considered to be a possible solution to mitigate the phosphorus effect. Jackets of low carbon and boron added JK2(JK2LB) were produced and tensile properties, fracture toughness, and crack propagation rate were measured at 4K. Elongation and fracture toughness at 4K after the heat treatment are 33% and 91 MPam$$^{0.5}$$ for the final jacket, which satisfy the ITER targets. JK2LB can be applied to the ITER CS.

Journal Articles

Irradiation behavior of high uranium-density alloys in the plate fuels

Ugajin, Mitsuhiro; Ito, Akinori; Akabori, Mitsuo; Ooka, Norikazu;

Journal of Nuclear Materials, 254(1), p.78 - 83, 1998/00

 Times Cited Count:22 Percentile:90.34(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Journal Articles

The Factors controlling vertical color variations of North Atlantic Madeira Abyssal Plain sediments

Nagao, Seiya;

Marine Geology, 109, p.83 - 94, 1992/00

 Times Cited Count:37 Percentile:73.29(Geosciences, Multidisciplinary)

no abstracts in English

JAEA Reports

Distribution of $$^{6}$$$$^{0}$$Co and $$^{5}$$$$^{4}$$Mn in Graphite Material of Irradiated HTGR Fuel Assemblies

; ; ; Minato, Kazuo; ; Ikawa, Katsuichi; Iwamoto, K.

JAERI-M 84-088, 24 Pages, 1984/05

JAERI-M-84-088.pdf:0.51MB

no abstracts in English

Journal Articles

Effect of hydrostatic pressure on the phase transitions in{N(CH$$_{3}$$)$$_{4}$$}$$_{2}$$MnCl$$_{4}$$}

; Ozawa, K.

Journal of the Physical Society of Japan, 53(2), p.627 - 634, 1984/00

 Times Cited Count:36 Percentile:87.41(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

A Band theory of magnetic structure of $$alpha$$-and $$beta$$-manganese

; ; *; *

J.Magn.Magn.Mater., 31-34, p.41 - 42, 1983/00

 Times Cited Count:4 Percentile:36.35(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Phase transition in{N(CH$$_{3}$$)$$_{4}$$}$$_{2}$$MnBr$$_{4}$$

Journal of the Physical Society of Japan, 52(8), p.2931 - 2935, 1983/00

 Times Cited Count:39 Percentile:88.66(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Journal Articles

Chromium and manganese in Japanese diet

; *; *; *

Journal of Radiation Research, 6, p.3 - 4, 1966/00

no abstracts in English

Journal Articles

Deteramination ot microamount of alminum, chromium, copper, iron, manganese, molybdenum and nickel in pure water by extraction photometry

;

Journal of Nuclear Science and Technology, 2(1), p.13 - 17, 1965/00

 Times Cited Count:9

no abstracts in English

Journal Articles

Fictitious transitions of the crystallographic structure in manganese telluride at high temperatures

; ; *

Journal of the Physical Society of Japan, 18(5), p.744 - 744, 1963/00

 Times Cited Count:6

no abstracts in English

Journal Articles

17 (Records 1-17 displayed on this page)
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