1
|
Yano S, Tobita H, Uno C, Ishibashi Y, Mishima S, Nagai A. Reactive hyperemia index is suitable for screening endothelial dysfunction especially in obese subjects with non-alcoholic hepatitis. Atherosclerosis 2018. [DOI: 10.1016/j.atherosclerosis.2018.06.586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
2
|
Kitao M, Hida T, Eguchi N, Tobita H, Utsugi H, Uemura A, Kitaoka S, Koike T. Light compensation points in shade-grown seedlings of deciduous broadleaf tree species with different successional traits raised under elevated CO2. Plant Biol (Stuttg) 2016. [PMID: 26404633 DOI: 10.1046/j.1365-3040.2000.00528.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
We measured leaf photosynthetic traits in shade-grown seedlings of four tree species native to northern Japan, raised under an elevated CO2 condition, to investigate the effects of elevated CO2 on shade tolerance of deciduous broadleaf tree species with different successional traits. We considered Betula platyphylla var. japonica and Betula maximowicziana as pioneer species, Quercus mongolica var. crispula as a mid-successional species, and Acer mono as a climax species. The plants were grown under shade conditions (10% of full sunlight) in a CO2 -regulated phytotron. Light compensation points (LCPs) decreased in all tree species when grown under elevated CO2 (720 μmol·mol(-1) ), which were accompanied by higher apparent quantum yields but no photosynthetic down-regulation. LCPs in Q. mongolica and A. mono grown under elevated CO2 were lower than those in the two pioneer birch species. The LCP in Q. mongolica seedlings was not different from that of A. mono in each CO2 treatment. However, lower dark respiration rates were observed in A. mono than in Q. mongolica, suggesting higher shade tolerance in A. mono as a climax species in relation to carbon loss at night. Thus, elevated CO2 may have enhanced shade tolerance by lowering LCPs in all species, but the ranking of shade tolerance related to successional traits did not change among species under elevated CO2 , i.e. the highest shade tolerance was observed in the climax species (A. mono), followed by a gap-dependent species (Q. mongolica), while lower shade tolerance was observed in the pioneer species (B. platyphylla and B. maximowicziana).
Collapse
Affiliation(s)
- M Kitao
- Department of Plant Ecology, Forestry and Forest Products Research Institute, Tsukuba, Japan
| | - T Hida
- Department of Forest Science, Hokkaido University, Sapporo, Japan
| | - N Eguchi
- Department of Forest Science, Hokkaido University, Sapporo, Japan
| | - H Tobita
- Department of Plant Ecology, Forestry and Forest Products Research Institute, Tsukuba, Japan
| | - H Utsugi
- Department of Plant Ecology, Forestry and Forest Products Research Institute, Tsukuba, Japan
| | - A Uemura
- Hokkaido Research Center, Forestry and Forest Products Research Institute, Sapporo, Japan
| | - S Kitaoka
- Department of Plant Ecology, Forestry and Forest Products Research Institute, Tsukuba, Japan
| | - T Koike
- Department of Forest Science, Hokkaido University, Sapporo, Japan
| |
Collapse
|
3
|
Kitao M, Hida T, Eguchi N, Tobita H, Utsugi H, Uemura A, Kitaoka S, Koike T. Light compensation points in shade-grown seedlings of deciduous broadleaf tree species with different successional traits raised under elevated CO2. Plant Biol (Stuttg) 2016; 18 Suppl 1:22-7. [PMID: 26404633 DOI: 10.1111/plb.12400] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2015] [Accepted: 09/17/2015] [Indexed: 05/06/2023]
Abstract
We measured leaf photosynthetic traits in shade-grown seedlings of four tree species native to northern Japan, raised under an elevated CO2 condition, to investigate the effects of elevated CO2 on shade tolerance of deciduous broadleaf tree species with different successional traits. We considered Betula platyphylla var. japonica and Betula maximowicziana as pioneer species, Quercus mongolica var. crispula as a mid-successional species, and Acer mono as a climax species. The plants were grown under shade conditions (10% of full sunlight) in a CO2 -regulated phytotron. Light compensation points (LCPs) decreased in all tree species when grown under elevated CO2 (720 μmol·mol(-1) ), which were accompanied by higher apparent quantum yields but no photosynthetic down-regulation. LCPs in Q. mongolica and A. mono grown under elevated CO2 were lower than those in the two pioneer birch species. The LCP in Q. mongolica seedlings was not different from that of A. mono in each CO2 treatment. However, lower dark respiration rates were observed in A. mono than in Q. mongolica, suggesting higher shade tolerance in A. mono as a climax species in relation to carbon loss at night. Thus, elevated CO2 may have enhanced shade tolerance by lowering LCPs in all species, but the ranking of shade tolerance related to successional traits did not change among species under elevated CO2 , i.e. the highest shade tolerance was observed in the climax species (A. mono), followed by a gap-dependent species (Q. mongolica), while lower shade tolerance was observed in the pioneer species (B. platyphylla and B. maximowicziana).
Collapse
Affiliation(s)
- M Kitao
- Department of Plant Ecology, Forestry and Forest Products Research Institute, Tsukuba, Japan
| | - T Hida
- Department of Forest Science, Hokkaido University, Sapporo, Japan
| | - N Eguchi
- Department of Forest Science, Hokkaido University, Sapporo, Japan
| | - H Tobita
- Department of Plant Ecology, Forestry and Forest Products Research Institute, Tsukuba, Japan
| | - H Utsugi
- Department of Plant Ecology, Forestry and Forest Products Research Institute, Tsukuba, Japan
| | - A Uemura
- Hokkaido Research Center, Forestry and Forest Products Research Institute, Sapporo, Japan
| | - S Kitaoka
- Department of Plant Ecology, Forestry and Forest Products Research Institute, Tsukuba, Japan
| | - T Koike
- Department of Forest Science, Hokkaido University, Sapporo, Japan
| |
Collapse
|
4
|
Nishiyama T, Kaneko K, Yamada K, Teranishi R, Kato T, Hirayama T, Tobita H, Izumi T, Shiohara Y. Three-dimensional characterization of BaHfO3 precipitates in GdBa2Cu3O7-y flim using STEM tomography. Microscopy (Oxf) 2014; 63 Suppl 1:i26-i27. [PMID: 25359824 DOI: 10.1093/jmicro/dfu080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
IntroductionSince the discovery of REBa2Cu3O7-y (RE: Rare Earth element, REBCO) superconductors, they have been expected as the best candidates for the power cable application due to its high critical temperature (Tc) and critical current density (Jc). Among those REBCO superconductors, GdBa2Cu3O7-y (GdBCO) have been receiving great interest because they have higher Tc and Jc than YBa2Cu3O7-y [1].GdBCO with various types of precipitates as artificial pinning centers (APCs) have been proposed to minimize the anisotropy of Jc characteristics under the magnetic field. Among those precipitates, BaHfO3 (BHO) was found most effective precipitates as APCs in GdBCO film prepared by pulsed laser deposition (PLD) method [2]. It is therefore necessary to investigate not only the morphologies but also the dispersion of BHO precipitates within the GdBCO, to understand the role of BHO for the superconducting characteristics. In this study, morphologies and dispersions of BHO precipitates were characterized three-dimensional by scanning transmission electron tomography ExperimentalBHO dispersed GdBCO films were fabricated on Hastelloy C-276TM substrates with buffer layers of CeO2/LaMnO3/MgO/ Gd2ZrO7 by PLD method.To observe microstructure of GdBCO film with BHO precipitates, cross-section TEM specimens were prepared by FIB method using Quanta 3D-200 (FEI, USA) with acceleration voltage from 2 to 30 kV. Three-dimensional information such as morphology and dispersion, of BHO precipitates were characterized by electron tomography using STEM-HAADF. Result and discussionFigure 1 shows three-dimensional reconstructed volume of BHO precipitates in GdBCO, which revealed that fine BHO precipitates have rod- and plate-like morphologies with homogeneous dispersion in GdBCO. In addition, growth directions of these precipitates were found with wide angular distributions from growth direction of GdBCO. Anisotropy of Jc in the magnetic fields was probably enhanced by various growth directions and homogeneous dispersion of nanosized BHO within GdBCO.jmicro;63/suppl_1/i26/DFU080F1F1DFU080F1Fig. 1.Three-dimensional reconstructed volume of BHO.
Collapse
Affiliation(s)
- T Nishiyama
- Department of Materials Science and Engineering, Kyushu University 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - K Kaneko
- Department of Materials Science and Engineering, Kyushu University 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - K Yamada
- Department of Materials Science and Engineering, Kyushu University 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - R Teranishi
- Department of Materials Science and Engineering, Kyushu University 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - T Kato
- Nanostructures Research Laboratory, Japan Fine Ceramics Center 2-4-1 Mutsuno, Atsuta-ku, Nagoya, 456-8587, Japan
| | - T Hirayama
- Nanostructures Research Laboratory, Japan Fine Ceramics Center 2-4-1 Mutsuno, Atsuta-ku, Nagoya, 456-8587, Japan
| | - H Tobita
- Superconductivity Research Laboratory, International Superconductivity Technology Center A-9 KSP R&D Business Park Building, 2-1, Sakado, 3-chome, Takatsu-ku, Kawasaki-shi, Kanagawa-ken 213-0012, Japann
| | - T Izumi
- Superconductivity Research Laboratory, International Superconductivity Technology Center A-9 KSP R&D Business Park Building, 2-1, Sakado, 3-chome, Takatsu-ku, Kawasaki-shi, Kanagawa-ken 213-0012, Japann
| | - Y Shiohara
- Superconductivity Research Laboratory, International Superconductivity Technology Center A-9 KSP R&D Business Park Building, 2-1, Sakado, 3-chome, Takatsu-ku, Kawasaki-shi, Kanagawa-ken 213-0012, Japann
| |
Collapse
|
5
|
|
6
|
|
7
|
Kabir MK, Kawata S, Adachi K, Tobita H, Miyazaki N, Kumagai H, Katada M, Kitagawa S. Iron-Chloranilate Intercalation Compounds: Synthesis, Crystal Structures, and Thermal Properties. ACTA ACUST UNITED AC 2006. [DOI: 10.1080/10587250008026187] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- M. K. Kabir
- a Department of Chemistry , Shizuoka University , 836 Oya, Shizuoka , 422-8529 , Japan
| | - S. Kawata
- a Department of Chemistry , Shizuoka University , 836 Oya, Shizuoka , 422-8529 , Japan
| | - K. Adachi
- a Department of Chemistry , Shizuoka University , 836 Oya, Shizuoka , 422-8529 , Japan
| | - H. Tobita
- b Department of Chemistry , Tokyo Metropolitan University , Minami Ohsawa, Hachiouji, Tokyo , 192-0397 , Japan
| | - N. Miyazaki
- a Department of Chemistry , Shizuoka University , 836 Oya, Shizuoka , 422-8529 , Japan
| | - H. Kumagai
- b Department of Chemistry , Tokyo Metropolitan University , Minami Ohsawa, Hachiouji, Tokyo , 192-0397 , Japan
| | - M. Katada
- b Department of Chemistry , Tokyo Metropolitan University , Minami Ohsawa, Hachiouji, Tokyo , 192-0397 , Japan
| | - S. Kitagawa
- c Department of Synthetic Chemistry and Biological Chemistry , Graduate School of Engineering, Kyoto University , Yoshida, Sakyo-ku, Kyoto , 606-8501 , Japan
| |
Collapse
|
8
|
|
9
|
|
10
|
|
11
|
|