1
|
Yamada T, Yoshiya M, Kanno M, Takatsu H, Ikeda T, Nagai H, Yamane H, Kageyama H. Correlated Rattling of Sodium-Chains Suppressing Thermal Conduction in Thermoelectric Stannides. Adv Mater 2023; 35:e2207646. [PMID: 36527352 DOI: 10.1002/adma.202207646] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Revised: 11/18/2022] [Indexed: 06/17/2023]
Abstract
Tin-based intermetallics with tunnel frameworks containing zigzag Na chains that excite correlated rattling impinging on the framework phonons are attractive as thermoelectric materials owing to their low lattice thermal conductivity. The correlated rattling of Na atoms in the zigzag chains and the origin of the low thermal conductivity is uncovered via experimental and computational analyses. The Na atoms behave as oscillators along the tunnel, resulting in substantial interactions between Na atoms in the chain and between the chain and framework. In these intermetallic compounds, a shorter inter-rattler distance results in lower thermal conductivity, suggesting that phonon scattering by the correlated rattling Na-chains is enhanced. These results provide new insights into the behavior of thermoelectric materials with low thermal conductivity and suggest strategies for the development of such materials that utilize the correlated rattling.
Collapse
Affiliation(s)
- Takahiro Yamada
- Institute of Multidisciplinary Research for Advanced Material, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan
- PRESTO, Japan Science and Technology Agency, 4-1-8 Honcho, Kawaguchi, 332-0012, Japan
| | - Masato Yoshiya
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Masahiro Kanno
- Institute of Multidisciplinary Research for Advanced Material, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan
- Department of Metallurgy, Materials Science and Materials Processing, Graduate School of Engineering, Tohoku University, 6-6-04 Aramaki Aza Aoba, Aoba-ku, Sendai, 980-8579, Japan
| | - Hiroshi Takatsu
- Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto, 615-8510, Japan
| | - Takuji Ikeda
- Research Institute for Chemical Process Technology, National Institute of Advanced Industrial Science and Technology (AIST Tohoku), 4-2-1 Nigatake, Miyagino-ku, Sendai, 983-8551, Japan
| | - Hideaki Nagai
- Research Institute for Energy Conservation, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki, 305-8565, Japan
| | - Hisanori Yamane
- Institute of Multidisciplinary Research for Advanced Material, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan
| | - Hiroshi Kageyama
- Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto, 615-8510, Japan
| |
Collapse
|
2
|
Pavan Kumar V, Passuti S, Zhang B, Fujii S, Yoshizawa K, Boullay P, Le Tonquesse S, Prestipino C, Raveau B, Lemoine P, Paecklar A, Barrier N, Zhou X, Yoshiya M, Suekuni K, Guilmeau E. Engineering Transport Properties in Interconnected Enargite‐Stannite type Cu2+xMn1‐xGeS4 Nanocomposites. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202210600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
| | - Sara Passuti
- CRISMAT: Laboratoire de cristallographie et sciences des materiaux CRISMAT FRANCE
| | - Bin Zhang
- Chongqing University Department of Applied Physics CHINA
| | - Susumu Fujii
- Osaka University: Osaka Daigaku Division of Materials and Manufacturing Science JAPAN
| | - Keita Yoshizawa
- Osaka University: Osaka Daigaku Division of Materials and Manufacturing Science JAPAN
| | - Philippe Boullay
- CRISMAT: Laboratoire de cristallographie et sciences des materiaux CRISMAT FRANCE
| | - Sylvain Le Tonquesse
- Max-Planck-Institut fur Chemische Physik fester Stoffe Max-Planck-Institut fur Chemische Physik fester Stoffe FRANCE
| | | | - Bernard Raveau
- CRISMAT: Laboratoire de cristallographie et sciences des materiaux CRISMAT FRANCE
| | | | - Arnold Paecklar
- CRISMAT: Laboratoire de cristallographie et sciences des materiaux CRISMAT FRANCE
| | - Nicolas Barrier
- CRISMAT: Laboratoire de cristallographie et sciences des materiaux CRISMAT FRANCE
| | - Xiaoyuan Zhou
- Chongqing University Department of Applied Physics CHINA
| | - Masato Yoshiya
- Osaka University: Osaka Daigaku Division of Materials and Manufacturing Science JAPAN
| | - Koichiro Suekuni
- Kyushu University: Kyushu Daigaku Department of Applied Science for Electronics and Materials JAPAN
| | | |
Collapse
|
3
|
Pavan Kumar V, Passuti S, Zhang B, Fujii S, Yoshizawa K, Boullay P, Le Tonquesse S, Prestipino C, Raveau B, Lemoine P, Paecklar A, Barrier N, Zhou X, Yoshiya M, Suekuni K, Guilmeau E. Engineering Transport Properties in Interconnected Enargite‐Stannite type Cu2+xMn1‐xGeS4 Nanocomposites. Angew Chem Int Ed Engl 2022; 61:e202210600. [PMID: 36097796 PMCID: PMC10100332 DOI: 10.1002/anie.202210600] [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] [Received: 07/19/2022] [Indexed: 11/06/2022]
Abstract
Understanding the mechanisms that connect heat and electron transport with crystal structures and defect chemistry is fundamental to develop materials with thermoelectric properties. In this work, we synthesized a series of self-doped compounds Cu2+x Mn1-x GeS4 through Cu for Mn substitution. Using a combination of powder X-ray diffraction, high resolution transmission electron microscopy and precession-assisted electron diffraction tomography, we evidence that the materials are composed of interconnected enargite- and stannite-type structures, via the formation of nanodomains with a high density of coherent interfaces. By combining experiments with ab initio electron and phonon calculations, we discuss the structure-thermoelectric properties relationships and clarify the interesting crystal chemistry in this system. We demonstrate that excess Cu+ substituted for Mn2+ dopes holes into the top of the valence band, leading to a remarkable enhancement of the power factor and figure of merit ZT.
Collapse
Affiliation(s)
| | - Sara Passuti
- CRISMAT: Laboratoire de cristallographie et sciences des materiaux CRISMAT FRANCE
| | - Bin Zhang
- Chongqing University Department of Applied Physics CHINA
| | - Susumu Fujii
- Osaka University: Osaka Daigaku Division of Materials and Manufacturing Science JAPAN
| | - Keita Yoshizawa
- Osaka University: Osaka Daigaku Division of Materials and Manufacturing Science JAPAN
| | - Philippe Boullay
- CRISMAT: Laboratoire de cristallographie et sciences des materiaux CRISMAT FRANCE
| | - Sylvain Le Tonquesse
- Max-Planck-Institut fur Chemische Physik fester Stoffe Max-Planck-Institut fur Chemische Physik fester Stoffe FRANCE
| | | | - Bernard Raveau
- CRISMAT: Laboratoire de cristallographie et sciences des materiaux CRISMAT FRANCE
| | | | - Arnold Paecklar
- CRISMAT: Laboratoire de cristallographie et sciences des materiaux CRISMAT FRANCE
| | - Nicolas Barrier
- CRISMAT: Laboratoire de cristallographie et sciences des materiaux CRISMAT FRANCE
| | - Xiaoyuan Zhou
- Chongqing University Department of Applied Physics CHINA
| | - Masato Yoshiya
- Osaka University: Osaka Daigaku Division of Materials and Manufacturing Science JAPAN
| | - Koichiro Suekuni
- Kyushu University: Kyushu Daigaku Department of Applied Science for Electronics and Materials JAPAN
| | | |
Collapse
|
4
|
Yasuda H, Morishita K, Nakatsuka N, Nishimura T, Yoshiya M, Sugiyama A, Uesugi K, Takeuchi A. Dendrite fragmentation induced by massive-like δ-γ transformation in Fe-C alloys. Nat Commun 2019; 10:3183. [PMID: 31320622 PMCID: PMC6639379 DOI: 10.1038/s41467-019-11079-y] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Accepted: 06/21/2019] [Indexed: 11/09/2022] Open
Abstract
Dendrite arm fragmentation is considered in solidification structure tailoring. Time-resolved and in situ imaging using synchrotron radiation X-rays allows the observation of dendrite arm fragmentation in Fe-C alloys. Here we report a dendrite arm fragmentation mechanism. A massive-like transformation from ferrite to austenite rather than the peritectic reaction occurs during or after ferrite solidification. The transformation produces refined austenite grains and ferrite-austenite boundaries in dendrite arms. The austenite grains are fragmented by the liquid phase that is produced at the grain boundary. In unidirectional solidification, a slight increase in temperature moves the ferrite-austenite interface backwards and promotes detachment of the primary and secondary arms at the δ-γ interface via a reverse peritectic reaction. The results show a massive-like transformation inducing the dendrite arm fragmentation has a role in formation of the solidification structure and the austenite grain structures in the Fe-C alloys.
Collapse
Affiliation(s)
- Hideyuki Yasuda
- Department of Materials Science and Engineering, Kyoto University, Sakyo, Kyoto, 606-8501, Japan.
| | - Kohei Morishita
- Department of Materials Science and Engineering, Kyoto University, Sakyo, Kyoto, 606-8501, Japan.,Department of Materials Science and Engineering, Kyushu University, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Noriaki Nakatsuka
- Department of Adaptive Machine Systems, Osaka University, Suita, Osaka, 565-0871, Japan.,Melting Section, Manufacturing Department, Moka Plant, Aluminum and Copper Business, Kobe Steel Ltd, 15 Kinugaoka, Moka, Tochigi, 321-4367, Japan
| | - Tomohiro Nishimura
- Department of Materials Science and Engineering, Kyoto University, Sakyo, Kyoto, 606-8501, Japan.,Kobe Corporate Research Laboratories, Kobe Steel Ltd., 1-5-5 Takatsukadai, Nishiku, Kobe, Hyogo, 651-2271, Japan
| | - Masato Yoshiya
- Department of Adaptive Machine Systems, Osaka University, Suita, Osaka, 565-0871, Japan
| | - Akira Sugiyama
- Department of Mechanical Engineering for Transportation, Osaka Sangyo University, Daito, Osaka, 574-8530, Japan
| | - Kentaro Uesugi
- Japan Synchrotron Radiation Research Institute (JASRI/SPring-8), Sayo-cho, Hyogo, 679-5198, Japan
| | - Akihisa Takeuchi
- Japan Synchrotron Radiation Research Institute (JASRI/SPring-8), Sayo-cho, Hyogo, 679-5198, Japan
| |
Collapse
|
5
|
Ogawa T, Otani N, Yokoi T, Fisher CAJ, Kuwabara A, Moriwake H, Yoshiya M, Kitaoka S, Takata M. Density functional study of the phase stability and Raman spectra of Yb 2O 3, Yb 2SiO 5 and Yb 2Si 2O 7 under pressure. Phys Chem Chem Phys 2018; 20:16518-16527. [PMID: 29868670 DOI: 10.1039/c8cp02497a] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The phase stability and Raman spectra of Yb2O3, Yb2SiO5 and Yb2Si2O7 under hydrostatic pressure are investigated using density functional theory calculations. The calculated energies of polymorphs of each compound show that the stable phases at zero pressure, viz., C-type Yb2O3, X2-Yb2SiO5 and β-Yb2Si2O7, exhibit a pressure-induced phase transition as compressive pressure increases, which is consistent with available experimental data. The theoretical Raman spectra at zero pressure are in good agreement with experimental results for the stable phases and can be used to identify each polymorph. Although the calculated pressure dependence of Raman peak positions of C-type Yb2O3 is overestimated compared to available experimental data, piezospectroscopic coefficients extracted from Raman peaks of X2-Yb2SiO5 and β-Yb2Si2O7 suggest that Raman spectroscopy can be used to measure stresses and strains in Yb silicates. Normal mode analyses reveal that characteristic Raman peaks of Yb silicates at frequencies above 600 cm-1 are strongly associated with vibrations of Si-O bonds in SixOy tetrahedral units.
Collapse
Affiliation(s)
- Takafumi Ogawa
- Nanostructures Research Laboratory, Japan Fine Ceramics Center, Nagoya 456-8587, Japan.
| | | | | | | | | | | | | | | | | |
Collapse
|
6
|
Feng B, Yokoi T, Kumamoto A, Yoshiya M, Ikuhara Y, Shibata N. B11-O-04Atomic-resolution STEM-EDS investigation of grain boundary solute segregation behavior in yttria-stabilized zirconia. Microscopy (Oxf) 2015. [DOI: 10.1093/jmicro/dfv074] [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] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
7
|
Yokoi T, Yoshiya M, Yasuda H. Nonrandom point defect configurations and driving force transitions for grain boundary segregation in trivalent cation doped ZrO₂. Langmuir 2014; 30:14179-14188. [PMID: 25378196 DOI: 10.1021/la503338x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The energetically favorable spatial configuration of M(3+) ions and oxide-ion vacancies near a symmetrical grain boundary (GB) in cubic zirconia is determined for various trivalent species M(3+) (M = Al, Sc, Y, Gd, La), and the driving force for grain boundary segregation (GBS) quantitatively examined using atomistic Monte Carlo simulations in conjunction with static lattice calculations. For a high concentration of ∼10 mol %, it is found that point defects near a GB plane preferentially occupy specific sites to minimize total lattice energy, rather than being randomly distributed. Systematic analysis shows that energetically stable configurations of segregants vary depending on their ionic radii. Analysis of the driving force for GBS as a function of dopant concentration reveals that three important factors govern GBS. First, occupation of specific sites by point defects is necessary to minimize the total lattice energy; enrichment of point defects near the GB plane with random configuration does not decrease the total lattice energy significantly because of strong Coulombic interactions. Second, the factors governing GBS change with increasing dopant concentration. At dilute concentrations, relief of bond strain is the dominant factor, while at high concentrations Coulombic interactions, which depend strongly on the specific arrangement of defects, become another dominant factor. Third, the stabilization of matrix cations, Zr(4+) ions, is the dominant factor to lower the driving force for GBS at all concentrations. In contrast, the stabilization of M(3+) ions does not necessarily contribute to GBS of point defects at high concentrations. These findings suggest practical ways to control GBS to enhance materials' properties or minimize detrimental effects.
Collapse
Affiliation(s)
- T Yokoi
- Department of Adaptive Machine Systems, Osaka University , 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | | | | |
Collapse
|
8
|
Yasuda H, Nagira T, Yoshiya M, Sugiyama A, Nakatsuka N, Kiire M, Uesugi M, Uesugi K, Umetani K, Kajiwara K. Massive transformation fromδphase toγphase in Fe–C alloys and strain induced in solidifying shell. ACTA ACUST UNITED AC 2012. [DOI: 10.1088/1757-899x/33/1/012036] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
9
|
Murakata K, Sato A, Yoshiya M, Kim S, Watarai M, Omata Y, Furuoka H. Infection of different strains of mice with Lawsonia intracellularis derived from rabbit or porcine proliferative enteropathy. J Comp Pathol 2008; 139:8-15. [PMID: 18479698 DOI: 10.1016/j.jcpa.2008.03.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2007] [Accepted: 03/05/2008] [Indexed: 12/12/2022]
Abstract
This report describes intestinal lesions in five strains of mice infected orally with Lawsonia intracellularis-infected tissue homogenates from rabbits or pigs (RLI and PLI). BALB/cA, C3H/HeJ, C57BL/6J and ICR mice were susceptible to infection with RLI, whereas only C3H/HeJ, C57BL/6J and ICR strains were susceptible to PLI. In susceptible mice, crypt epithelial hyperplasia occurred in association with an inflammatory reaction, as in proliferative enteropathy (PE) in other species. The intestinal changes in the infected mice varied from mild to severe. Unlike rabbit or porcine PE, in which the changes are confined to the ileum, the lesions in mice were located in the caecum. Immunolabelling of L. intracellularis antigen was abundant in early infection when the epithelial hyperplasia was mild or absent. When the hyperplasia had become severe, however, immunolabelling was weak. For this reason, it is suggested that transitory infection of the epithelium induces epithelial hyperplasia. Genetic differences between mouse strains appeared to play an important role in the response to L. intracellularis infection. Moreover, the susceptibility of BALB/cA mice to RLI but not to PLI suggests that there are significant biological differences between L. intracellularis isolates from rabbit PE and porcine PE.
Collapse
Affiliation(s)
- K Murakata
- Department of Pathobiological Science, Obihiro University of Agriculture and Veterinary Medicine, Obihiro 080-8555, Japan
| | | | | | | | | | | | | |
Collapse
|
10
|
Yamashita M, Yoshiya M, Ishikawa Y, Ohsato H, Shibata N. Boron addition effects on aluminum nitride fabricated by radio-frequency plasma-assisted molecular beam epitaxy. ACTA ACUST UNITED AC 2007. [DOI: 10.1002/pssc.200674793] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
11
|
Yoshiya M, Harada A, Takeuchi M, Matsunaga K, Matsubara H. Perturbed Molecular Dynamics for Calculating Thermal Conductivity of Zirconia. Molecular Simulation 2004. [DOI: 10.1080/08927020410001709389] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
12
|
Abstract
The first principles calculations of ELNES/XANES of AlN polytypes were carried out by the first-principles OLCAO method using large supercells composed of more than 100 atoms. It can quantitatively reproduce the experimental spectra from wurtzite AlN using a 108-atoms supercell. ELNES from rock-salt and zinc-blend AlN were predicted by using 128 atoms supercells. The spectral features of rock-salt phase are different from other phases, whereas that of zinc-blend phase have numerous similarities with that from wurtzite AlN. Characteristic differences between the wurtzite and zinc-blend phases are predicted to appear at the first peak of Al L(2,3) and K edges. The first peak of zinc-blend AlN is broader than that of wurtzite AlN. The same tendency was found in the case of SiC. In order to elucidate the cause of the broadness at the first peak, partial density of states and chemical bondings were investigated. The theoretical analysis revealed that the broadness of the first peak is related to the covalency of the compounds. This result suggests that the spectral features at the first peak of L(2,3) and K edges contain information about the covalency at the illuminated area.
Collapse
Affiliation(s)
- Teruyasu Mizoguchi
- Department of Materials Science and Engineering, Kyoto University, Sakyo, Kyoto, 606-8501 Yoshida, Japan.
| | | | | | | | | | | |
Collapse
|
13
|
Abstract
Electron-energy-loss near edge structures (ELNES) at the Zn-L(2,3) edge and the O-K edge have been measured for 10 mol% ZnO-doped MgO, and were compared with spectra from reference materials. In order to interpret the spectra, first principles molecular orbital calculations were made using model clusters composed of 125 and 153 atoms. Photoabsorption cross sections (PACS) were computed at the Slater's transition state in which a half-filled core hole was included in the self-consistent calculations. The difference in the coordination numbers of Zn was found well distinguishable by the Zn-L(2,3)-edge ELNES. The experimental spectra in the first 25 eV were well reproduced by the theoretical PACS. In this energy region, the Zn-L(2,3)-edge ELNES from four-fold coordinated Zn showed four sets of peaks, whereas the six-fold coordinated Zn exhibits three sets of peaks. The origin of these peaks can be explained by the point symmetry within the first coordination unit. A small shift toward the lower energy side was observed in the O-K edge ELNES of the ZnO-doped MgO as compared with pure MgO. This can be ascribed to the lower energy of the Zn-4s orbital as compared with the Mg-3s orbital, which is the common mechanism to the difference in the band gap between MgO and ZnO.
Collapse
Affiliation(s)
- T Mizoguchi
- Department of Materials Science and Engineering, University of Kyoto, Sakyo, Japan
| | | | | | | | | | | |
Collapse
|
14
|
Iwase M, Yoshiya M, Kakuta S, Nagumo M. Clinical trial of recombinant granulocyte colony-stimulating factor for chemotherapy-induced neutropenia patients with oral cancer. J Oral Maxillofac Surg 1997; 55:836-40; discussion 841. [PMID: 9251612 DOI: 10.1016/s0278-2391(97)90344-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
PURPOSE This study was undertaken to evaluate the efficacy and toxicity of recombinant human granulocyte colony-stimulating factor (rhG-CSF) in reducing neutropenia in patients with oral cancer undergoing intensive chemotherapy. MATERIALS AND METHODS Patients with chemotherapy-induced neutropenia (< 1 x 10(9)/L) were divided into two groups: control group (n = 13) and rhG-CSF administration group (n = 16). rhG-CSF was administered subcutaneously at a dose of 75 micrograms/day on consecutive days. Peripheral blood cell counts and oral complications were investigated in each group. RESULTS The duration of neutropenia and absolute neutrophil nadir counts were significantly improved by administration of G-CSF. No consistent effect on thrombocytopenia was noted. Administration of rhG-CSF also reduced the duration and degree of oral complications associated with chemotherapy-induced neutropenia. Intolerable side effects associated with administration of rhG-CSF were not observed. CONCLUSION It was concluded that rhG-CSF is effective in shortening the duration of neutropenia after chemotherapy at a dose of 75 micrograms/day.
Collapse
Affiliation(s)
- M Iwase
- Second Department of Oral and Maxillofacial Surgery, School of Dentistry, Showa University, Tokyo, Japan
| | | | | | | |
Collapse
|
15
|
Yayama K, Yoshiya M, Takahashi K, Matsui T, Takano M, Okamoto H. Role of the kidney in the plasma clearance of angiotensinogen in the rat: plasma clearance and tissue distribution of 125I-angiotensinogen. Life Sci 1995; 57:1791-801. [PMID: 7475921 DOI: 10.1016/0024-3205(95)02157-e] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
We studied the tissue distribution and plasma clearance of angiotensinogen (AGN) in rats following an i.v. injection of 125I-labeled AGN. The plasma clearance rate of [125I]AGN fits a two-compartment model with half-lives of 10.2 +/- 1.5 min and 4.1 +/- 0.5 h in non-treated rats, and the half-life of slower phase significantly increased to 10.2 +/- 1.1 h following bilateral nephrectomy. Radioactivity was predominantly distributed in the kidneys (4.9%), and to a lesser extent in the liver (1.8%), testis (1.2%), spleen (0.61%), heart (0.35%), lung (0.18%), thymus (0.03%) and brain (0.03%). The subcellular distribution of radioactivity in the kidney was 64% in the soluble fraction and 33% in the crude mitochondrial-lysosomal fraction. Sodium dodecylsulfate-polyacrylamide gel electrophoresis revealed that the radioactivity in the soluble fraction consisted of proteins corresponding to intact [125I]AGN, whereas the mitochondrial-lysosomal fraction contained additional radioactive proteins with molecular weights between 18,000 and 29,000. When isolated kidney cells were incubated with [125I]AGN at 0 degree C, the radioactive binding was saturable and specific with a Kd value of 4.8 x 10(-11)M, whereas incubation at 37 degrees C resulted in the appearance of degraded products of [125I]AGN in the medium. These results suggested that circulating AGN is cleared mainly by the kidneys via receptor-mediated endocytosis, which may play an important role in regulating plasma level of AGN.
Collapse
Affiliation(s)
- K Yayama
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Kobe Gakuin University, Japan
| | | | | | | | | | | |
Collapse
|
16
|
Hatori M, Yoshiya M, Kurachi Y, Nagumo M. Prolonged infection of the floor of the mouth in hyperimmunoglobulinemia E (Buckley's syndrome). Report of a case. Oral Surg Oral Med Oral Pathol 1993; 76:289-93. [PMID: 8378042 DOI: 10.1016/0030-4220(93)90255-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
A case of prolonged infection of the floor of the mouth with a generalized eczematous dermatitis in a 13-year-old boy is described. Immunologic examination revealed markedly elevated serum concentration of immunoglobulin E (IgE) and impaired neutrophil chemotaxis. The disorder was diagnosed as the hyperimmunoglobulinemia E (Buckley's syndrome) and was successfully treated with high doses of antibiotics and human immunoglobulin.
Collapse
Affiliation(s)
- M Hatori
- Second-Department of Oral and Maxillofacial Surgery, School of Dentistry, Showa University, Tokyo, Japan
| | | | | | | |
Collapse
|
17
|
Yoshiya M, Tsutsui Y, Itoh N, Okamoto H. Angiotensinogen excretion in rat urine: effects of lipopolysaccharide treatment and sodium balance. Jpn J Pharmacol 1991; 57:37-44. [PMID: 1800798 DOI: 10.1254/jjp.57.37] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Rat urine was found to contain a component showing cross-reactivity with antibody against rat plasma angiotensinogen. Sodium dodecyl sulfate polyacrylamide gel electrophoresis of rat urine revealed antigenic bands corresponding to the molecular weights of plasma angiotensinogen. The urinary angiotensinogen excretion in 8 rats, determined by direct radioimmunoassay, was 2.70 +/- 0.21 micrograms/day. Induction of acute inflammation in rats by injection of lipopolysaccharide caused about a 7-fold increase of urinary angiotensinogen excretion in the 24 hr after injection, with a concomitant elevation of plasma angiotensinogen. Neither sodium depletion nor loading by a low- or high-sodium diet altered the urinary excretion of angiotensinogen. These results suggest that the angiotensinogen present in rat urine is derived from that in plasma, although the level of excretion is too low to have any influence on the plasma level of angiotensinogen.
Collapse
Affiliation(s)
- M Yoshiya
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Kobe-Gakuin University, Japan
| | | | | | | |
Collapse
|
18
|
Mitsumoto K, Yagami K, Yoshiya M, Kakuta S, Kimura Y, Nagumo M, Imamura M. [Surgical correction of open bite with simultaneous maxillary and mandibular operation]. Showa Shigakkai Zasshi 1989; 9:231-6. [PMID: 2641181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
|
19
|
Kanemoto K, Yoshiya M, Nagumo M. Evaluation of Langerhans cells and T cell subsets in oral lichen planus, in comparison with oral leukoplakia. Showa Shigakkai Zasshi 1988; 8:85-91. [PMID: 3267121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
|
20
|
Yoshiya M, Tsutsui S, Hayashi Y, Wada A, Kimura Y, Nagumo M, Yoshimura S. [Experience with surgical correction of masseteric hypertrophy]. Showa Shigakkai Zasshi 1985; 5:55-61. [PMID: 3862204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
|