Autor: Ishida, T. - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Magnetic Field Effect on Yb-Based Heavy Fermions near Magnetic-Nonmagnetic Transition
Autorzy:: Mito, T.
Koyama, T.
Nakagawara, K.
Ishida, T.
Ueda, K.
Kohara, T.
Matsubayashi, K.
Saiga, Y.
Tematy:: 71.27.+a
75.30.Kz
75.30.Mb
78.70.Dm; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1534203.pdf Link otwiera się w nowym oknie
Opis:: Recently magnetic field effects on f electron systems in the vicinity of a magnetic-nonmagnetic transition have attracted much interest. In order to investigate the mechanism of field induced modifications in heavy fermion systems, especially in terms of valent degrees of freedom, we have carried out the X-ray absorption spectroscopy measurement on the newly discovered heavy fermion material $YbCo_2Zn_{20}$ which exhibits extremely large specific heat at low temperatures. Our results show that the Yb valence of $YbCo_2Zn_{20}$ is very close to +3 over the whole temperature range of measurement. Besides, no significant change in the absorption spectrum was observed up to the field of 10 T. This contrasts to the previously reported strong field dependence in the resistivity, followed by an expansion of the Fermi liquid regime with increasing field. The obtained results therefore lead to the conclusion that the valent degrees of freedom play a minor role in the strong field dependence of the heavy fermion systems in this compound.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 2.

Tytuł:: Effects of inoculation with a commercial microbial inoculant Bacillus subtilis C-3102 mixture on rice and barley growth and its possible mechanism in the plant growth stimulatory effect
Autorzy:: Jamily, A.S.
Koyama, Y.
Win, T.A.
Toyota, K.
Chikamatsu, S.
Shirai, T.
Uesugi, T.
Murakami, H.
Ishida, T.
Yasuhara, T.
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/65625.pdf Link otwiera się w nowym oknie
Opis:: The effects of a microbial inoculant (Thervelics®: a mixture of cells of Bacillus subtilis C-3102 and carrier materials) on rice (Oryza sativa cv. Milkyprincess) and barley (Hordeum vulgare cv. Sachiho Golden) were evaluated in four pot experiments. In the first and second experiments, the dry matter production of rice and barley increased significantly by 10–20% with the inoculation of the mixture at a rate of 107 cfu ⋅ g–1 soil compared with the non-inoculated control. In the third experiment, the growth promoting effects of the mixture, the autoclaved mixture and the carrier materials were compared. The dry mater production of rice grains was the highest in the mixture, and it was significantly higher in the three treatments than in the control, suggesting that the carrier materials may also have a plant growth promoting effect and the living cells might have an additional stimulatory effect. To confirm the efficacy of the living cells in the mixture, only B. subtilis C-3102 cells were used in the fourth experiment. In addition, to estimate the mechanisms in growth promotion by B. subtilis C-3102, three B. subtilis strains with similar or different properties in the production of indole-3-acetic acid (IAA), protease and siderophore and phosphatesolubilizing ability were used as reference strains. Only B. subtilis C-3102 significantly increased the dry matter production of rice grains and the soil protease activity was consistently higher in the soil inoculated with B. subtilis C-3102 throughout the growing period. These results indicate that the microbial inoculant including live B. subtilis C-3102 may have growth promoting effects on rice and barley.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 3.

Tytuł:: Three-dimensional imaging of the Jurassic radiolarian Protunuma ? ochiensis Matsuoka : an experimental study using high-resolution X-ray micro-computed tomography
Autorzy:: Ishida, N.
Kishimoto, N.
Matsuoka, A.
Kimoto, K.
Kurihara, T.
Yoshino, T.
Tematy:: three dimensional imaging
X-ray microcomputed tomography
laminated object manufacturing
radiolaria
Protunuma ? ochiensis; Pokaż więcej
Wydawca:: Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Powiązania:: https://bibliotekanauki.pl/articles/2077323.pdf Link otwiera się w nowym oknie
Opis:: To evaluate the utility of high-resolution micro-computed tomography (micro-CT) in observing radiolarian fossils, we examined the skeleton of the Jurassic radiolarian fossil Protunuma ? ochiensis Matsuoka using a micro-CT device. Although this species is a closed Nassellarian with a thick exterior wall, important taxonomic characters on the interior and exterior of the shell were represented almost perfectly in the acquired three-dimensional computer graphic images. These characters include those documented in the original description, such as the height and width of the skeleton, the outline, the number of segments, the pore arrangement and other features. In addition, the structure of the initial spicule of this species was revealed newly. An enlarged plaster radiolarian model printed using the laminated modelling method was useful for detailed observation. Nondestructive omnidirectional observation is an advantage of this method, which is not possible with scanning electron microscopy or optical microscopic investigations. Micro-CT technology would become an effective observational tool for radiolarian studies in the near future.
Dostawca treści:: Biblioteka Nauki