213 results on '"K. Akutsu"'
Search Results
2. Multi-view stereo reconstruction technique for weakly-textured surfaces
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Hiroaki Date, Honma Ryohei, K. Akutsu, Y. Niina, and Satoshi Kanai
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Computer science ,business.industry ,Stereo reconstruction ,Computer vision ,Artificial intelligence ,business - Published
- 2021
3. Sex-related differences in clinical features and in-hospital outcomes of acute aortic dissection type b
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T Kunihara, Masao Yamasaki, Morimasa Takayama, Takeshi Yamamoto, K Hagiya, Ken Nagao, M Kawata, H Masuhara, K Watanabe, T Takahashi, T Shimokawa, M Usui, Hideaki Yoshino, K Akutsu, and Hitoshi Ogino
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medicine.medical_specialty ,Hospital outcomes ,business.industry ,Internal medicine ,Aortic dissection type b ,medicine ,Sex related ,Cardiology and Cardiovascular Medicine ,business - Abstract
Background Acute aortic dissection (AAD) is a life-threatening medical condition with high morbidity and mortality. The association between female sex and poorer outcomes following surgery for AAD type A has been reported; however, the sex-related differences in clinical features and in-hospital outcomes of AAD type B remain to be elucidated. Methods We studied a total of 1877 patients with AAD type B who were enrolled in the Tokyo Acute Aortic Super-network from January 2013 to December 2016. Clinical features and in-hospital outcomes were compared between sexes. Independent predictors of in-hospital mortality were assessed using a multivariable analysis. Results The mean age of the patients was 69±13 years and 549 (29%) were females. Female patients were older than males (74±13 years vs 67±13 years; p Conclusion In AAD type B, females were older and had altered consciousness level, IMH-type, and a less widespread dissection more frequently than males. The overall in-hospital mortality was higher in females; however, female sex was not associated with in-hospital mortality after multivariable adjustment. Funding Acknowledgement Type of funding source: None
- Published
- 2020
4. Diagnostic markers for discriminating between acute aortic dissection and acute myocardial infarction during the pre-hospital phase: analysis of 3,195 cases
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M Usui, M Kawata, Morimasa Takayama, Masao Yamasaki, Hideaki Yoshino, T Shimokawa, K Watanabe, K Akutsu, Takeshi Yamamoto, T Kunihara, H Masuhara, Hitoshi Ogino, Ken Nagao, K Hagiya, and T Takahashi
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Aortic dissection ,medicine.medical_specialty ,medicine.diagnostic_test ,business.industry ,Physical examination ,medicine.disease ,Chest pain ,Blood pressure ,Diabetes mellitus ,Internal medicine ,Epidemiology ,Back pain ,medicine ,Cardiology ,Myocardial infarction ,medicine.symptom ,Cardiology and Cardiovascular Medicine ,business - Abstract
Both acute aortic dissection (AAD) and acute myocardial infarction (AMI) present with chest pain and are life-threatening diseases that require early diagnosis and treatment for better clinical outcome. However, two critical diseases in the very acute phase are sometimes difficult to differentiate, especially prior to arrival at the hospital for urgent diagnosis and selection of specific treatment. The aim of our study was to clarify the diagnostic markers acquired from the information gathered from medical history taking and physical examination for discriminating AAD from AMI by using data from the Tokyo Cardiovascular Care Unit (CCU) Network database. We examined the clinical features and laboratory data of patients with AAD and AMI who were admitted to the hospital in Tokyo between January 2013 and December 2015 by using the Tokyo CCU Network database. The Tokyo CCU Network consists of >60 hospitals that fulfil certain clinical criteria and receive patients from ambulance units coordinated by the Tokyo Fire Department. Of 15,061 patients diagnosed as having AAD and AMI, 3,195 with chest pain within 2 hours after symptom onset (537 AAD and 2,658 AMI) were examined. The patients with out-of-hospital cardiac arrest were excluded. We compared the clinical data of the patients with chest pain who were diagnosed as having AAD and AMI. The following indicators were more frequent or had higher values among those with AAD: female sex (38% vs. 20%, P In patients with chest pain suspicious of AAD and AMI, “back pain accompanied by chest pain with SBP ≥150 mmHg” or “back pain accompanied by chest pain with SBP Funding Acknowledgement Type of funding source: None
- Published
- 2020
5. Estimation of Polychlorinated Biphenyls Intake through Fish Oil-Derived Dietary Supplements and Prescription Drugs in the Japanese Population
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I. Sakuma, Momoko Ishiyama, Taiki Higuchi, Kunihiko Nakai, Noriko Ryuda, K. Akutsu, Nozomi Tatsuta, Daisuke Ueno, and Yuki Matsuo
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Tolerable daily intake ,lcsh:TP368-456 ,polychlorinated biphenyls ,business.industry ,Daily intake ,prescription drugs ,risk assessment ,food and beverages ,Japanese population ,japan ,Fish oil ,fish oils ,Japanese market ,dietary supplements ,lcsh:Food processing and manufacture ,Medicine ,Oily fish ,Food science ,Daily exposure ,Medical prescription ,business ,Food Science - Abstract
Background: Oily fish and their extracted oils may be a source of polychlorinated biphenyls (PCBs) which can induce toxic effects on the consumers. The main aim of this survey was estimation of PCBs intake through fish oil-derived dietary supplements and prescription drugs in the Japanese population. Methods: PCBs levels were determined in 20 fish oil-derived dietary supplements and 6 oil-derived prescription drugs from the Japanese market using Gas Chromatography-Mass Spectrometry. Then, the daily exposure to PCBs was estimated. Data were statistically analyzed using JMP software suite. Results: Totally, 17 of the 26 fish oil-derived products were contaminated with PCBs. The median PCB concentrations in the total set of fish oil-derived products was 2.2 ng/g oil wt. with a range of
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- 2019
6. Improved performance of wide bandwidth neutron-spin polarizer due to ferromagnetic interlayer exchange coupling
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T. Bigault, Noboru Miyata, Dai Yamazaki, P. Courtois, Kazuhiko Soyama, T. Saerbeck, K. Akutsu-Suyama, Hiroyuki Aoki, Ryuji Maruyama, and Takayasu Hanashima
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Condensed Matter::Materials Science ,Magnetization ,Materials science ,Magnetic moment ,Condensed matter physics ,Ferromagnetism ,Exchange interaction ,General Physics and Astronomy ,Curie temperature ,Neutron ,Neutron scattering ,Anisotropy - Abstract
Ferromagnetic (FM) interlayer exchange coupling of ion-beam sputtered Fe/Ge multilayers was investigated by off-specular polarized neutron scattering measurements. We observed a monotonously growing correlation of magnetic moments in the out-of-plane direction with decreasing Ge thickness. The magnetic properties of the multilayers with and without the FM interlayer exchange coupling agree well with the three- and two-dimensional random anisotropy model, respectively, assuming an FM interlayer exchange coupling comparable to the direct exchange interaction within the sample plane. The results of the Fe/Ge multilayers were used to invoke FM interlayer exchange coupling in a neutron polarizing supermirror in order to extend its bandwidth. Typically, the bandwidth is limited due to a Curie temperature close to room temperature of the thinnest Fe layers with less than 3 nm. We propose a modified layer sequence of the neutron polarizing supermirror, where the minimum Fe thickness was set to 3.5 nm, whereas the Ge thickness was reduced. A performance test of the neutron polarizing supermirror showed that the FM interlayer exchange coupling contributed to the presence of the magnetization comparable to the bulk and resulted in a marked extension in the bandwidth.
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- 2021
7. L-Methionine induces powdery mildew resistance in tomato
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M. Saito, M. Nakajima, Y. Yamamoto, and K. Akutsu
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0106 biological sciences ,0301 basic medicine ,03 medical and health sciences ,Horticulture ,chemistry.chemical_compound ,030104 developmental biology ,Methionine ,chemistry ,Resistance (ecology) ,Biology ,01 natural sciences ,Powdery mildew ,010606 plant biology & botany - Published
- 2017
8. L-Methionine induces resistance to Fusarium wilt of tomato plants
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T. Arie, M. Nakajima, K. Akutsu, and M. Saito
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0106 biological sciences ,0301 basic medicine ,03 medical and health sciences ,chemistry.chemical_compound ,Horticulture ,030104 developmental biology ,Methionine ,chemistry ,Resistance (ecology) ,Biology ,01 natural sciences ,Fusarium wilt ,010606 plant biology & botany - Published
- 2017
9. P5607Clinical characteristics and treatment strategy for acute aortic dissection in Tokyo Acute Aortic Disease Super-Network System
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Hitoshi Ogino, H Masuhara, T Shimokawa, T Takahashi, K Watanabe, M Usui, Morimasa Takayama, M Kawada, T Kunihara, Takeshi Yamamoto, Hideaki Yoshino, T Niino, Ken Nagao, and K Akutsu
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Aortic dissection ,medicine.medical_specialty ,business.industry ,Internal medicine ,medicine ,Cardiology ,Treatment strategy ,Cardiology and Cardiovascular Medicine ,business ,medicine.disease ,Aortic disease - Abstract
Introduction Acute aortic dissection (AAD) is one of the most fatal cardiovascular diseases. The prevalence of AAD is reported to be low. The clinical data of AAD from representative cardiovascular centers are not enough to show the whole range of clinical feature of AAD. We have to know the exact prevalence and clinical pictures of AAD under the new system, the Tokyo AAD Super-Network System (TAAD-SNS), for strategy of emergency transport and treatment of AAD which would cover the entire metropolitan area of Tokyo. TAAD-SNS started in 2011, and after slight modification, the new system of AAD re-started in 2013. The aim of this study is to elucidate the whole range of clinical characteristics and recent trends of treatment of AAD. Methods Out of 73 hospitals included in Tokyo CCU Network system, 41 hospitals are chosen for TAAD-SNS. These hospitals provide around-the-clock surgery. In this system, the availability of surgical division is monitored in real time. All of the patients suspected of AAD are transferred directly or from primary care hospital to the hospitals of TAAD-SNS. Results After exclusion of 237 patients with cardiopulmonary arrest on arrival, 4877 consecutive patients (2923 male, mean age of 69±14 y/o) were admitted to the hospitals with diagnosis of AAD from 2013 to 2016. Prevalence of AAD in Tokyo was about 10 patients per 100,000 populations in every year. After exclusion of 37 patients undetermined into type A or B, 4840 patients (2694 with type A and 2146 with type B) were analyzed. Among the type A patients, 1752 (65%) were classified into type of patent false lumen (classic-type), 721 (27%) of closed false lumen (intramural hematoma: IMH-type), and 221 (8%) were undetermined. Among the type B, 880 (41%) were classified into classic-type, 1129 (53%) of IMH-type, and 137 (6%) were undetermined. Both among type A and B, mean ages were younger in classic-type than in IMH-type (type A: 66±14 vs. 73±12 y/o, p Conclusion Our study showed that prevalence of AAD was 2–3 times higher than previous reports. We should consider to choose the treatment strategy according to the type of AAD, A or B, classic-type or IMH-type. Acknowledgement/Funding Tokyo Metropolitan government
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- 2019
10. DFT Simulation of Electron Spectra for Auger Electron and Photoelectron Spectra of Lithium Compounds
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K. Akutsu, K. Takaoka, Kazunaka Endo, K. Hyodo, K. Goto, Y. Sato, and K. Sakuramoto
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Auger electron spectroscopy ,Valence (chemistry) ,010304 chemical physics ,Chemistry ,Binding energy ,Analytical chemistry ,02 engineering and technology ,Electron ,021001 nanoscience & nanotechnology ,Kinetic energy ,01 natural sciences ,X-ray photoelectron spectroscopy ,0103 physical sciences ,Density functional theory ,Physical and Theoretical Chemistry ,0210 nano-technology ,Ground state - Abstract
(Li, O, F)-Auger electron, and X-ray photoelectron spectra (AES, VXPS) of solid lithium compounds (Li metal, LiCl, LiF, Li2O) are simulated by deMon density functional theory (DFT) calculations using the model molecules of the unit cell. Calculated valence XPS, core-electron binding energies (CEBE)s, and Li-, O-, and F-KVV AES for the substances correspond considerably well to experimental results. For the calculation of VXPS, the observed spectra of Li2O pellet with chemisorbed CO2 almost show agreement with simulation curve of the valence XPS according to the model for the 1/1 ratio of Li2O/Li2CO3. In the case of AES calculation, we analyze the experimental AES with our modified Auger electron kinetic energy calculation method which corresponds to the two final-state holes at the ground state and at the transition-state in DFT calculation by removing 1 and 2 electrons, respectively. Experimental KVV AES of the Li atom, and (O, F) KVV AES of (Li2O and LiF) in the substances almost agree well to the AES calculated with maximum kinetic energies at the ground state, and at the transition-state, respectively.
- Published
- 2016
11. Precise Nuclear Quadrupole Moments of 8B and 13B
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T. Miyake, M. Sasaki, H. Fujiwara, Kei Minamisono, Masako Ogura, M. Suda, K. Akutsu, M. Hirai, Y. J. Xu, Takehisa Iwakoshi, G. F. Krebs, T. Sumikama, Yongnan Zheng, Jose R. Alonso, S. Y. Zhu, S. Sato, Mitsutaka Kanazawa, J. Z. Zhu, Tadanori Minamisono, Kensaku Matsuta, T. Nagatomo, Mototsugu Mihara, Y. Nakashima, Yoichi Nojiri, T. J. M. Symons, Masami Torikoshi, Atsushi Kitagawa, M. Fukuda, and Sadao Momota
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Coupling constant ,Nuclear physics ,Nuclear and High Energy Physics ,Chemistry ,Quadrupole ,Physical and Theoretical Chemistry ,Atomic physics ,Condensed Matter Physics ,Single crystal ,Hyperfine structure ,Atomic and Molecular Physics, and Optics - Abstract
The electric quadrupole coupling constants eqQ/h of 8B (I π = 2+, T 1/2 = 769 ms) and 13B (I π = 3/2−, T 1/2 = 17.4 ms) in single crystal TiO2 have been precisely measured by the β-NQR technique. The ratios of these Q moments to Q(12B) were determined as |Q(8B)/Q(12B)| = 4.882(32) and |Q(13B)/Q(12B)| = 2.768(24).
- Published
- 2005
12. Nuclear Spin Orientation Created in Heavy Ion Collisions and the Sign of the Q Moment of 13B
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T. Nagatomo, Y. Nakashima, Masami Torikoshi, Atsushi Kitagawa, M. Hirai, T. Sumikama, J. Z. Zhu, M. Sasaki, Jose R. Alonso, Mitsutaka Kanazawa, S. Sato, M. Fukuda, Sadao Momota, K. Akutsu, Y. J. Xu, T. J. M. Symons, T. Miyake, Yoichi Nojiri, Mototsugu Mihara, Masako Ogura, Kei Minamisono, M. Suda, H. Fujiwara, Kensaku Matsuta, Takehisa Iwakoshi, Tadanori Minamisono, Yongnan Zheng, G. F. Krebs, and S. Y. Zhu
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Physics ,Coupling constant ,Nuclear and High Energy Physics ,media_common.quotation_subject ,Condensed Matter Physics ,Polarization (waves) ,Asymmetry ,Atomic and Molecular Physics, and Optics ,Quadrupole ,Heavy ion ,Physical and Theoretical Chemistry ,Atomic physics ,media_common ,Kinematical model - Abstract
The momentum dependences of the nuclear spin polarization P and alignment A of 13B(I π = 3/2+, T 1/2 = 17.36 ms) produced in the 100A MeV 15N + Be collisions have been measured by detecting β-ray asymmetry. Because both the P and A were significantly smaller than the prediction from a simple kinematical model, some relaxation mechanisms must be take into account. Comparing the signs of the observed alignment of 12B, the sign of the quadrupole coupling constant eqQ of 13B in TiO2 was determined to be positive.
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- 2005
13. SYNTHESIS OF <font>CaB</font>6 SINGLE CRYSTALS AND SAMPLE EVALUATION BY PIXE MEASUREMENT
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M. Fukuda, Yoshihiko Inada, Y. Nakashima, Yoshichika Onuki, K. Akutsu, Hiroaki Shishido, S. Kudo, Kensaku Matsuta, Mototsugu Mihara, Tadanori Minamisono, and K. Arimura
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Crystal ,Crystallography ,Flux method ,Materials science ,Impurity ,Doping ,Analytical chemistry ,Sample (graphics) ,Single crystal ,Microanalysis - Abstract
CaB 6 single crystals were synthesized by the Al flux method and the Fe -impurity concentration in the crystal was measured using the PIXE method. As a result, we found that the amount of the Fe impurity, included in a CaB 6 powder sample used as a starting material, is drastically reduced after the synthesis process. Lightly La doped CaB 6 single crystals were also synthesized and the La concentration was determined by PIXE.
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- 2005
14. Magnetic moment of 33Cl
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Masako Ogura, M. Suda, T. Nagatomo, K. Akutsu, Mototsugu Mihara, Jose R. Alonso, S. Kudo, Takashi Ohtsubo, Kei Minamisono, Masami Torikoshi, M. Takechi, Atsushi Kitagawa, Toru Miyake, M. Fukuda, Sadao Momota, Yoichi Nojiri, K. Arimura, K. Tanaka, M. Sasaki, Tadanori Minamisono, Kensaku Matsuta, Takehisa Iwakoshi, G. F. Krebs, M. Saihara, M. Hirai, T. Sumikama, T. J. M. Symons, Mitsutaka Kanazawa, and A. Sakamoto
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Physics ,Nuclear and High Energy Physics ,Neutron magnetic moment ,Magnetic moment ,Proton magnetic moment ,Nuclear magnetic moment ,SHELL model ,Atomic physics ,Electron magnetic dipole moment ,Spin magnetic moment - Abstract
The magnetic moment of 33 Cl ( I π = 3 / 2 + , T 1 / 2 = 2.51 s ) has been re-measured precisely by β -NMR method. The obtained magnetic moment | μ | = 0.7549 ( 3 ) μ N is consistent with the old value 0.7523 ( 16 ) μ N , but is 5 times more accurate. The value is well reproduced by the shell model calculation, μ S M = 0.70 μ N . Combined with the magnetic moment of the mirror partner 33 S, the nuclear matrix elements 〈 l p 〉 , 〈 l n 〉 , 〈 S p 〉 , and 〈 S n 〉 were derived.
- Published
- 2004
15. Precise nuclear moments of 13B and the β-ray angular distribution
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S. Kumashiro, Masami Torikoshi, Atsushi Kitagawa, M. Fukuda, Sadao Momota, K. Akutsu, Takehisa Iwakoshi, Masako Ogura, Mototsugu Mihara, G. F. Krebs, M. Suda, T. Nagatomo, Jose R. Alonso, Y. Nakashima, M. Hirai, T. Sumikama, Yongnan Zheng, Mitsutaka Kanazawa, Yoichi Nojiri, T. J. M. Symons, Y. J. Xu, Tadanori Minamisono, Shengyun Zhu, Kensaku Matsuta, M. Sasaki, M. Miyake, S. Sato, J. Z. Zhu, H. Fujiwara, and Kei Minamisono
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Physics ,Nuclear and High Energy Physics ,Angular distribution ,Magnetic moment ,Moment (physics) ,Order (group theory) ,Atomic physics ,Spin (physics) ,Mass system - Abstract
The nuclear moments of 13B(Iπ = 3/2−, T1/2 = 17.36ms) have been re-measured precisely in order to establish the spin manipulation technique for the study of the alignment correlation term in mass system A = 13. From the β-NMR on 13B in Pt, the magnetic moment was determined as |μ(13B)| = 3.1778(5)μN. From the β-NQR on 13B in TiO2, the Q moment has been determined as |Q(13B)| = 36.6(8)mb. We have measured the alignment correlation term α_E for 13B β decay for the first time and obtained a preliminary result as α−(13B) = 0.15(12)%/MeV.
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- 2004
16. Nuclear spin orientation of 12,13B created in heavy ion collisions
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Mototsugu Mihara, T. Nagatomo, Y. J. Xu, S. Sato, Shengyun Zhu, Y. Nakashima, K. Akutsu, S. Kumashiro, M. Fukuda, Sadao Momota, J. Z. Zhu, M. Sasaki, Takehisa Iwakoshi, Masami Torikoshi, G. F. Krebs, Tadanori Minamisono, Atsushi Kitagawa, H. Fujiwara, Yoichi Nojiri, T. J. M. Symons, Jose R. Alonso, M. Hirai, T. Sumikama, Mitsutaka Kanazawa, Kei Minamisono, Kensaku Matsuta, M. Miyake, Masako Ogura, M. Suda, and Yongnan Zheng
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Physics ,Nuclear and High Energy Physics ,Spin polarization ,media_common.quotation_subject ,Quadrupole ,Depolarization ,Heavy ion ,Atomic physics ,Polarization (waves) ,Asymmetry ,media_common ,Kinematical model - Abstract
The momentum dependences of the nuclear spin polarization P and alignment A of 12 B ( I π = 1 + , T 1 / 2 = 20.20 ms) [ 13 B ( I π = 3 / 2 − , T 1 / 2 = 17.36 ms)] produced in 100 A MeV 13 C [ 15 N] + Be collisions have been measured by detecting the β -ray asymmetry. Because both the P and A were significantly smaller than the prediction from a simple kinematical model, some depolarization mechanisms must be taken into account related with the collision process itself. Comparing the signs of the observed alignment of 12 B and 13 B, the sign of the quadrupole moment Q ( 13 B) was determined to be positive.
- Published
- 2004
17. Development of a Nuclear Spin Dewar: Hyperfine Interactions of the Short-Lived Emitter 12B in TiO2
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Takehisa Iwakoshi, T. Sumikama, K. Akutsu, Kensaku Matsuta, T. Miyake, T. Nagatomo, S. Kudo, M. Fukuda, Mototsugu Mihara, Kazunori Sato, Masako Ogura, Tadanori Minamisono, Hisazumi Akai, and K. Minamisono
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Nuclear reaction ,Spin polarization ,Chemistry ,Analytical chemistry ,General Physics and Astronomy ,Rutile ,Electric field ,Physical and Theoretical Chemistry ,Atomic physics ,Spin (physics) ,Hyperfine structure ,Single crystal ,Mathematical Physics ,Electric field gradient - Abstract
The β-NMR detection of 12B ( Iπ= 1+, T1/2 = 20.2 msec) implanted in a TiO2 (rutile) single crystal following a nuclear reaction showed that its spin polarization produced in the reaction is totally maintained during its lifetime. Two implantation sites with relative populations 9:1 were identified. The electric field gradients (EFGs) were determined to be q = +(37.1 0.5) 1015 V/cm2 with η< 0.03 and q = +(185 5) 1015 V/cm2 with η= 0.62 0.02 for the major (90%) and minor (10%) sites, respectively. The EFGs were compared with the theoretical values given by the band-structure calculation in the framework of the KKR method. TiO2 crystals with proper treatment can be a good “Spin Dewar” in which any short-lived nuclei can be implanted, and their spin polarizations as produced in nuclear reactions can be maintained during their lifetime
- Published
- 2002
18. [Untitled]
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K. Minamisono, Tadanori Minamisono, K. Akutsu, T. Miyake, K. Arimura, S. Kudo, K. Hashimoto, Mototsugu Mihara, Kensaku Matsuta, and M. Fukuda
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Crystal ,Nuclear and High Energy Physics ,chemistry ,chemistry.chemical_element ,Quadrupole splitting ,Physical and Theoretical Chemistry ,Atomic physics ,Condensed Matter Physics ,Boron ,Hyperfine structure ,Atomic and Molecular Physics, and Optics ,Electric field gradient - Abstract
The hyperfine interactions of short-lived β-emitter 12B implanted into a CaB6 crystal have been studied by means of the β-NMR technique. An electric quadrupole splitting has been observed at room temperature from which an electric field gradient of q=−(1.34±0.05)×1021 V/m2 was determined. From the present result, it was found that the 12B nuclei are mainly implanted in the substitutional boron site.
- Published
- 2001
19. [Untitled]
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T. Nagatomo, Mototsugu Mihara, Tadanori Minamisono, Hisazumi Akai, K. Hashimoto, K. Akutsu, M. Ota, T. Miyake, T. Sumikama, K. Minamisono, K. Arimura, Koichi Sato, M. Fukuda, S. Kudo, Masako Ogura, Takehisa Iwakoshi, and Kensaku Matsuta
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Nuclear reaction ,Nuclear and High Energy Physics ,Chemistry ,Analytical chemistry ,Electronic structure ,Condensed Matter Physics ,Polarization (waves) ,Atomic and Molecular Physics, and Optics ,Impurity ,Electric field ,Physical and Theoretical Chemistry ,Spin (physics) ,Hyperfine structure ,Electric field gradient - Abstract
It was confirmed by detecting the β-NMR of 12B (I π=1+, T 1/2=20.2 ms) in a TiO2 (rutile) crystal that the nuclear spin polarization of 12B was totally maintained in the crystal as produced through a nuclear reaction before implantation. Two locations, site 1 and site 2, were found with the relative populations 9 and 1, respectively, and the electric field gradients (EFGs) at those sites were obtained to be q(site 1)=+(37.1±0.5)1015 V/cm2, η(site 1)
- Published
- 2001
20. [Untitled]
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Sadao Momota, T. Sumikama, T. Miyake, M. Fukuda, Jose R. Alonso, A. Kitagawa, Mototsugu Mihara, M. Ota, S. Kudo, Y. J. Xu, T. Nagatomo, M. Torikoshi, K. Minamisono, M. Suda, T. J. M. Symons, Masako Ogura, S. Y. Zhu, Tadanori Minamisono, K. Hashimoto, K. Akutsu, M. Kanazawa, M. Hirai, K. Arimura, Yoichi Nojiri, Takehisa Iwakoshi, G. F. Krebs, Kensaku Matsuta, and J. Z. Zhu
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Nuclear reaction ,Physics ,Nuclear and High Energy Physics ,Angular momentum ,Isotope ,Spin polarization ,Depolarization ,Condensed Matter Physics ,Atomic and Molecular Physics, and Optics ,Physical and Theoretical Chemistry ,Atomic physics ,Spin (physics) ,Hyperfine structure ,Radioactive decay - Abstract
The nuclear spin alignments of the β-emitting fragments 12B(I π=1+, T 1/2=20.2 ms) and 13B(I π=3/2−, T 1/2=17.4 ms) produced in the 100A-MeV 13C, 15N + 9Be collisions respectively have been observed for the first time detecting asymmetric β-ray emission from these nuclei. By means of the spin manipulation technique based on the hyperfine interaction of B isotopes in TiO2, both the polarization P and the alignment A were determined reliably. The obtained P and A were significantly smaller than the expectation from the kinematical model. From the fact that the quenching factors for P and A are almost the same, there may be some depolarization mechanism in the collision process itself.
- Published
- 2001
21. Giant superstructures formed on graphite surface treated with NaOH solutions studied by scanning tunneling microscopy
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K Akutsu, Hidemi Shigekawa, K. Hata, Koji Miyake, Ryuji Morita, Mikio Yamashita, and T Yamada
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Surface (mathematics) ,Materials science ,Moiré pattern ,Atomic and Molecular Physics, and Optics ,Electronic, Optical and Magnetic Materials ,law.invention ,Graphite intercalation compound ,chemistry.chemical_compound ,Crystallography ,Lattice constant ,Zigzag ,chemistry ,Highly oriented pyrolytic graphite ,law ,Graphite ,Scanning tunneling microscope ,Instrumentation - Abstract
Giant superstructures with 1.71 and 9.1 nm lattice constants were observed by scanning tunneling microscopy (STM) on the surface of highly oriented pyrolytic graphite (HOPG) treated with NaOH solution. These structures were analyzed by the moire pattern hypothesis. For both the structures, the orientation angle mismatch of the giant lattices relative to the original atomic lattice of graphite was observed between the theoretical and experimental values. In addition, for the latter structure, the observed boundaries between the superstructural domain and the normal areas were straight, which is different from the theoretically predicted zigzag shape boundary. These discrepancies suggest the existence of some other mechanism responsible for the giant superstructures appearing in graphite intercalation compound surfaces.
- Published
- 1998
22. Milk yield, daily gain and feed efficiency in calves of Limousin cross, Japanese short horn and Japanese black
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K., Akutsu, N., Ishikawa, M., Ohta, H., Shinohara, T., Chiba, and T., Yamagishi
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増体量 ,哺乳量 ,飼料利用性 ,日本短角種 ,リムジン交雑種 - Published
- 1997
23. Fungal and bacterial disease resistance in transgenic plants expressing human lysozyme
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Fumiharu Ishige, Hiroki Nakajima, Kenji Oeda, K. Akutsu, and Toshiya Muranaka
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Erysiphe cichoracearum ,Bacterial disease ,biology ,Nicotiana tabacum ,fungi ,food and beverages ,Plant Science ,General Medicine ,Genetically modified crops ,Plant disease resistance ,biology.organism_classification ,Microbiology ,chemistry.chemical_compound ,chemistry ,Cauliflower mosaic virus ,Lysozyme ,Agronomy and Crop Science ,Conidium formation - Abstract
The human lysozyme gene, which is assembled by the stepwise ligation of chemically synthesized oligonucleotides, was introduced into tobacco (Nicotiana tabacum cv `SR1') by the Agrobacterium-mediated method. The introduced human lysozyme gene was highly expressed under the control of the cauliflower mosaic virus 35S promoter, and the gene product accumulated in the transgenic tobacco plants. The transgenic tobacco plants showed enhanced resistance against the fungus Erysiphe cichoracearum - both conidia formation and mycelial growth were reduced, and the size of the colony was diminished. Microscopic observation revealed that the transgenic tobacco plants carried the resistant phenotype, analogous to that of the resistant cultivar `Kokubu' which had been selected by conventional breeding. Growth of the phytopathogenic bacterium Pseudomonas syringae pv. tabaci was also strongly retarded in the transgenic tobacco, and the chlorotic halo of the disease symptom was reduced to 17% of that observed in the wild-type tobacco. Thus, the introduction of a human lysozyme gene is an effective approach to protect crops against both fungal and bacterial diseases.
- Published
- 1997
24. Surface treatment of plastic material by pulse corona induced plasma chemical process-PPCP
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I. Tochizawa, A. Iwata, Senichi Masuda, K. Kuwano, K. Akutsu, and S. Hosokawa
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Polypropylene ,chemistry.chemical_classification ,Auxiliary electrode ,Materials science ,Analytical chemistry ,Adhesion ,Polymer ,Plasma ,Corona ,Industrial and Manufacturing Engineering ,Pulse (physics) ,chemistry.chemical_compound ,chemistry ,Control and Systems Engineering ,Electrode ,Electrical and Electronic Engineering ,Composite material - Abstract
A novel plasma chemical process PPCP (pulse corona induced plasma chemical process) can produce copious active radicals in air under NTP (normal temperature and pressure) by using an extremely fast rising narrow high voltage pulse between corona electrodes and grounded counter electrodes so that intense streamer coronas are generated. This provides an effective means of surface treatment to a plastic material placed between the two electrodes through generation of free bonds on the surface directed to the corona electrodes. Special features of this method are that it can cope with a complex shape of the material to be treated, and that it does not spark even at the periphery near the grounded counter electrode. This method is suitable for the surface treatment of polypropylene bumpers so as to provide a strong adhesion of color paint to it. The adhesion strength of a paint film is raised from zero to ca. 1000 g/cm/sup 2/ by PPCP treatment for 60 seconds. >
- Published
- 1994
25. Lattice Locations of 12B in CaB6
- Author
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K. Akutsu, M. Fukuda, K. Matsuta, K. Minamisono, S. Kudo, T. Miyake, T. Minamisono, K. Arimura, K. Hashimoto, and Mototsugu Mihara
- Subjects
Materials science ,Ferromagnetism ,chemistry ,Condensed matter physics ,Lattice (order) ,Doping ,Quadrupole ,General Physics and Astronomy ,chemistry.chemical_element ,Physical and Theoretical Chemistry ,Boron ,Mathematical Physics ,Electric field gradient - Abstract
The nuclear quadrupole interaction of the short-lived -emitter 12B implanted into CaB6 crystal has been studied by means of modified β-NMR (β-NQR) technique. The electric field gradient at the implanted 12B was found to be = q-(1.34±0.05)x1021 V/m2 at room temperature. From this result it is concluded that the 12B probe nuclei are mainly implanted in the substitutional boron site and are applicable to systematic NMR studies of ferromagnetic La doped CaB6
- Published
- 2002
26. Antitumor effect of the angiogenesis inhibitor agm-1470 and its combination effect with tamoxifen in dmba induced mammary-tumors in rats
- Author
-
Masakazu Toi, T. Imazawa, T. Takayanagi, K. Akutsu, Y. Yamamoto, and Takeshi Tominaga
- Subjects
Cancer Research ,Cell growth ,Angiogenesis ,Basic fibroblast growth factor ,DMBA ,Biology ,Antiestrogen ,Angiogenesis inhibitor ,chemistry.chemical_compound ,Oncology ,chemistry ,Cancer research ,medicine ,Growth inhibition ,Tamoxifen ,medicine.drug - Abstract
AGM-1470 is known to inhibit angiogenesis. It inhibited the mitogen induced cell growth in microvascular endothelial cells in vitro. Ten ng/ml AGM-1470 completely inhibited both basic fibroblast growth factor induced cell growth, and interleukin-4 induced cell growth. In an in vivo study, we invesigated the antitumor effect of AGM-1470 in dimethylbenz[a]anthracene (DMBA) induced rat mammary tumors. A dose dependent growth inhibition was seen between administered doses 10 mg/kg and 40 mg/kg. Forty mg/kg 2-week administration of AGM-1470 totally suppressed the tumor growth. In addition, an additive inhibitory effect of AGM-1470 with an antiestrogen tamoxifen was found (p
- Published
- 2011
27. Use of chrysanthemum plantlets grown in vitro to test cultivar susceptibility to white rust, Puccinia horiana P. Hennings
- Author
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M. Nakajima, Y. Takatsu, K. Akutsu, M. Hayashi, K. Ohishi, and Y. Tomita
- Subjects
biology ,Inoculation ,fungi ,food and beverages ,Plant Science ,Plant disease resistance ,Rust ,humanities ,Spore ,biology.plant_disease ,Micropropagation ,Agronomy ,Germination ,Genetics ,Puccinia horiana ,Cultivar ,Agronomy and Crop Science - Abstract
An efficient incubation and inoculation system for white rust was established using plantlets of chrysanthemum growing in vitro. The internal conditions of a culture vessel (plant box) were maintained at a humidity of 90-100% and an optimum temperature of 20-25°C, which are suitable conditions to germinate teliospores and basidiospores of the pathogen. Telia were maintained continuously on plants in the plant box and were used as an inoculum for infection experiments throughout the year, allowing differences in susceptibility to white rust among chrysanthemum cultivars to be detected. Susceptibility to white rust in the plant-box evaluation showed a good correlation with the rating of sporulation on plants grown in a greenhouse. The method described here is a simple, space-saving inoculation system to evaluate the susceptibility of chrysanthemums to white rust.
- Published
- 2000
28. Nuclear Spin Orientation Created in Heavy Ion Collisions and the Sign of the Q Moment of 13B
- Author
-
T. Nagatomo, K. Matsuta, Y. Nakashima, T. Sumikama, M. Ogura, K. Akutsu, T. Iwakoshi, H. Fujiwara, T. Minamisono, M. Fukuda, M. Mihara, T. Miyake, K. Minamisono, S. Momota, Y. Nojiri, A. Kitagawa, M. Sasaki, M. Torikoshi, M. Kanazawa, M. Suda, M. Hirai, S. Sato, S. Y. Zhu, J. Z. Zhu, Y. J. Xu, Y. N. Zheng, J. R. Alonso, G. F. Krebs, and T. M. Symons
- Published
- 2008
29. Precise Nuclear Quadrupole Moments of 8B and 13B
- Author
-
T. Nagatomo, T. Sumikama, M. Ogura, K. Matsuta, Y. Nakashima, K. Akutsu, T. Iwakoshi, H. Fujiwara, T. Minamisono, M. Fukuda, M. Mihara, K. Minamisono, T. Miyake, S. Momota, Y. Nojiri, A. Kitagawa, M. Sasaki, M. Torikoshi, M. Kanazawa, M. Suda, M. Hirai, S. Sato, S. Y. Zhu, J. Z. Zhu, Y. J. Xu, Y. N. Zheng, J. R. Alonso, G. F. Krebs, and T. M. Symons
- Published
- 2008
30. Surface treatment of plastic material by pulse corona induced plasma chemical process-PPCP
- Author
-
S. Masuda, I. Tochizawa, K. Akutsu, K. Kuwano, and A. Iwata
- Published
- 2002
31. Sequence analysis of Pns11, a nonstructural protein of rice gall dwarf virus, and its expression and detection in infected rice plants and vector insects
- Author
-
Y, Moriyasu, K, Ishikawa, A, Kikuchi, S, Imanishi, S, Tomita, K, Akutsu, and T, Omura
- Subjects
Viral Proteins ,Sequence Homology, Amino Acid ,Blotting, Western ,Molecular Sequence Data ,Animals ,Oryza ,Amino Acid Sequence ,Sequence Analysis, DNA ,Viral Nonstructural Proteins ,Reoviridae ,Insect Vectors ,Plant Proteins - Abstract
The nucleotide sequence of genome segment S11 of rice gall dwarf virus (RGDV), a member of Phytoreovirus, was determined. The segment encodes a putative protein of 40 kDa that exhibits approximately 37% homology at the amino acid level to the nonstructural proteins Pns10 of rice dwarf and wound tumor viruses, which are other members of Phytoreovirus. A band of a protein with an apparent molecular mass of 40 kDa was specifically detected in an analysis of cells transfected with S11 cDNA. An antiserum raised against this protein reacted with a protein of approximately 40kDa after fractionation by SDS-PAGE of materials prepared from infected plants and from viruliferous vector insects. However, the antiserum did not react with purified viral proteins. These results suggest that S11 encodes a nonstructural protein of RGDV. This protein was named Pns11.
- Published
- 2000
32. A volume and tone control IC for Hi-Fi audio
- Author
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K. Suzuki, K. Akutsu, T. Suzuki, and Mamoru Sato
- Subjects
Total harmonic distortion ,Materials science ,Clock signal ,business.industry ,Electrical engineering ,Mixed-signal integrated circuit ,Switched capacitor ,Signal ,Tone control circuit ,law.invention ,Integrated injection logic ,law ,Optoelectronics ,Electrical and Electronic Engineering ,Resistor ,business - Abstract
A monolithic IC which contains dual-channel volume control circuits, tone control circuits, and function switches is discussed. The IC has excellent characteristics, such as total harmonic distortion of less than 0.002 percent (at 1 kHz, 300 mV rms input signal) and a signal-to-noise ratio of more than 100 dB (at 300 mV rms input signal, A weighting). SIPOS-gate MOSFET's and polysilicon ion implanted resistors are employed, yielding good signal level accuracy and low distortion.
- Published
- 1981
33. A preliminary study of re-entrainment in an electro-static precipitator
- Author
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J.D. Bassett, K. Akutsu, and Senichi Masuda
- Subjects
Chemistry ,Velocity gradient ,Flow (psychology) ,Laminar flow ,Adhesion ,Mechanics ,Condensed Matter Physics ,Surfaces, Coatings and Films ,Electronic, Optical and Magnetic Materials ,Physics::Fluid Dynamics ,Boundary layer ,Classical mechanics ,Electrode ,Particle ,Mean flow ,Electrical and Electronic Engineering ,Biotechnology - Abstract
Observations were made of re-entrained particles which were deposited electrostatically in a laboratory model precipitator. Photographs of particle trajectories were obtained, the mean gas flow at which re-entrainment occurred, and the structure of the flow near the collecting electrode, were measured. A distinct difference between trajectories of particles was noted depending upon whether or not ‘back discharge’ was occurring. Consideration of adhesion and removal forces was consistent with mean flow measurements at which re-entrainment occurred, and the shape of observed particle trajectories could be explained by a combination of electrical, gravitational and flow forces. Flow measurements indicated a velocity gradient in the laminar boundary layer sufficient to explain particle removal, although significant differences in the velocity gradient for different mean flow velocities could not be observed.
- Published
- 1977
34. A ceramic-based ozonizer using high-frequency discharge
- Author
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Y. Awatsu, S. Masuda, M. Kuroda, Y. Shibuya, and K. Akutsu
- Subjects
Glow discharge ,Ozone ,business.industry ,Analytical chemistry ,Industrial and Manufacturing Engineering ,Power (physics) ,chemistry.chemical_compound ,Volume (thermodynamics) ,chemistry ,Control and Systems Engineering ,visual_art ,Electrode ,visual_art.visual_art_medium ,Optoelectronics ,Ceramic ,Electrical and Electronic Engineering ,business ,Electrical efficiency ,Voltage - Abstract
A thin ceramic layer, either cylindrical or planar in form, is sandwiched by a number of parallel strip-like discharge electrodes and a film-like induction electrode. An AC exciting voltage of frequency 10 kHz and 10 kV peak-to-peak (p-p) is applied between the electrodes to produce a stable high-frequency surface glow discharge for generation of ozone. As a result of its high frequency, low exciting voltage, and small size, a great reduction in cost is achieved in both the ozonizer and its power supply. The presented ozonizer can easily produce a very high ozone concentration (5000-15000 volume p.p.m. for air; 50-100000 volume p.p.m. for oxygen) without using a special enrichment means. Its power efficiency can be made very high (170 gO/kWh for air) by proper selection of operating parameters. >
- Published
- 1988
35. Peptidylarginine Deiminase of the Mouse
- Author
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S Tagami, Masashi Kusubata, K Akutsu, Hidenari Takahara, Mamoru Tsuchida, and Kiyoshi Sugawara
- Subjects
medicine.medical_specialty ,Immunoelectron microscopy ,Immunocytochemistry ,Uterus ,Protein-arginine deiminase ,Cell Biology ,Biology ,Endometrium ,Biochemistry ,Molecular biology ,Submandibular gland ,Staining ,medicine.anatomical_structure ,Endocrinology ,Internal medicine ,medicine ,Protein-Arginine Deiminase Type-4 ,Molecular Biology - Abstract
Peptidylarginine deiminase (protein-L-arginine iminohydrolase, EC 3.5.3.15) is widely distributed in various organs of the mouse. Activity in salivary glands, pancreas, and uterus is higher than that in the other organs. In submandibular gland and uterus, sex- and estrous cycle-related differences were observed, respectively. The activity in the submandibular gland from females was approximately four times higher than that in the male. In the uterus, the activity increased in proportion to the hyperplasia of the tissues. Peptidylarginine deiminase from the murine skeletal muscle resembles the enzyme obtained from other animal species with respect to enzymatic and chemical properties. Double immunodiffusion tests and immunoblotting analyses showed that the enzymes present in each murine tissue have the same molecular weight (81,000) and are immunologically indistinguishable. Immunohistochemical analyses of salivary glands and pancreas revealed an intense staining only of the exocrine cells. In uterus, the staining was restricted to the luminal and glandular epithelia of endometrium; the intensity of the staining changed during the course of the estrous cycle. Furthermore, immunoelectron microscopy showed that the enzyme is distributed diffusely in the cytoplasm of the exocrine cell. These observations indicate the general importance of peptidylarginine deiminase, presumably in a cytoplasmic secretory process of the exocrine cells.
- Published
- 1989
36. Characteristics of standing-wave, ring-type electric curtain. experimental study
- Author
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Senichi Masuda, K. Akutsu, and Yoichi Matsumoto
- Subjects
Physics ,Standing wave ,Energy Engineering and Power Technology ,Ring type ,Mechanics ,Electrical and Electronic Engineering - Published
- 1973
37. Characteristics of the Standing Wave Electric Curtain of Ring Type-Experimental Study
- Author
-
Y. Matsumoto, K. Akutsu, and S. Masuda
- Subjects
Standing wave ,Materials science ,Energy Engineering and Power Technology ,Ring type ,Mechanics ,Electrical and Electronic Engineering - Published
- 1973
38. Peptidylarginine deiminase of the mouse. Distribution, properties, and immunocytochemical localization
- Author
-
H, Takahara, M, Tsuchida, M, Kusubata, K, Akutsu, S, Tagami, and K, Sugawara
- Subjects
Male ,Mice ,Protein-Arginine Deiminase Type 4 ,Hydrolases ,Submandibular Gland ,Uterus ,Protein-Arginine Deiminases ,Animals ,Female ,Immunohistochemistry ,Pancreas ,Subcellular Fractions - Abstract
Peptidylarginine deiminase (protein-L-arginine iminohydrolase, EC 3.5.3.15) is widely distributed in various organs of the mouse. Activity in salivary glands, pancreas, and uterus is higher than that in the other organs. In submandibular gland and uterus, sex- and estrous cycle-related differences were observed, respectively. The activity in the submandibular gland from females was approximately four times higher than that in the male. In the uterus, the activity increased in proportion to the hyperplasia of the tissues. Peptidylarginine deiminase from the murine skeletal muscle resembles the enzyme obtained from other animal species with respect to enzymatic and chemical properties. Double immunodiffusion tests and immunoblotting analyses showed that the enzymes present in each murine tissue have the same molecular weight (81,000) and are immunologically indistinguishable. Immunohistochemical analyses of salivary glands and pancreas revealed an intense staining only of the exocrine cells. In uterus, the staining was restricted to the luminal and glandular epithelia of endometrium; the intensity of the staining changed during the course of the estrous cycle. Furthermore, immunoelectron microscopy showed that the enzyme is distributed diffusely in the cytoplasm of the exocrine cell. These observations indicate the general importance of peptidylarginine deiminase, presumably in a cytoplasmic secretory process of the exocrine cells.
- Published
- 1989
39. [Correlation of vectorcardiography and chest lead cardiography from the standpoint of transferring impedance]
- Author
-
T, Fujino, K, Akutsu, J, Hishida, T, Kobayashi, and J, Toyama
- Subjects
Electrocardiography ,Vectorcardiography ,Humans ,Models, Theoretical - Published
- 1966
40. Oxygen uptake of man while walking at 2,500 m altitude
- Author
-
Y, Sugiura and K, Akutsu
- Subjects
Adult ,Male ,Oxygen Consumption ,Japan ,Altitude ,Physical Exertion ,Humans ,Mountaineering - Published
- 1967
41. ION UPTAKE OF SWEET POTATO ROOTS INFECTED BY THE BLACK ROT FUNGUS<xref ref-type='fn' rid='fn1'>1</xref>
- Author
-
Hidemasa Imaseki, Ikuzo Uritani, and K. Akutsu
- Subjects
Black rot ,biology ,Physiology ,Botany ,Cell Biology ,Plant Science ,General Medicine ,Fungus ,biology.organism_classification - Published
- 1967
42. [Hydronephrosis in children due to mucosal flap valve at the pelvicoureteric junction, with statistical evaluation of hydronephrosis in children in Japan]
- Author
-
I, Watanabe, T, Tezuka, F, Furukawa, M, Sayama, and K, Akutsu
- Subjects
Male ,Mucous Membrane ,Japan ,Child, Preschool ,Humans ,Infant ,Female ,Hydronephrosis ,Ureter ,Child ,Kidney - Published
- 1966
43. Development of a 3He nuclear spin flip system on an in-situ SEOP 3He spin filter and demonstration for a neutron reflectometer and magnetic imaging technique.
- Author
-
H Hayashida, T Oku, H Kira, K Sakai, K Hiroi, T Ino, T Shinohara, T Imagawa, M Ohkawara, K Ohoyama, K Kakurai, M Takeda, D Yamazaki, K Oikawa, M Harada, N Miyata, K Akutsu, M Mizusawa, J D Parker, and Y Matsumoto
- Published
- 2016
- Full Text
- View/download PDF
44. Inter-individual variability in elliptical and diagonal error distributions potentially relevant to optimal motor planning in football instep kicking.
- Author
-
Sado N, Yazawa M, Tominaga T, and Akutsu K
- Subjects
- Humans, Male, Young Adult, Biomechanical Phenomena, Athletic Performance, Adult, Adolescent, Soccer, Motor Skills, Psychomotor Performance physiology
- Abstract
The distribution of motor errors can influence optimal motor planning (where to aim). In football instep kicking, it was shown that ball landing locations exhibit the right-up-left-down elliptical distribution in right-footed kickers and vice versa. However, this was reported as a result of mixed multiple kickers; the individual-level error distribution has been unclear. Here we show substantial inter-individual variability in error shape and error direction in the 30 kicks aimed at a target (1.7 m high, 11.0 m in front) by 27 male football players. All players exhibit right-up-left-down distributions with ellipticity (minor/major radius ratio of the 95% confidence ellipse) ranging from 0.25 to 0.77 and major axis angle ranging from 13 to 67° from the horizontal axis. The mean absolute error and the area of the 95% confidence ellipse are not significantly correlated with major axis angle (ρ ≤ 0.312) and ellipticity (|r| ≤ 0.343). By simulating shots aimed at the top-right and top-left edges of a goal with these observed ranges and normalised ellipse area, we reveal a wide range of probability of shots on goal (top-right: 2.7-fold difference, top-left: 1.5-fold difference) due to inter-individual variability in error shape and direction independent of error size. Further simulation shows that, depending on the shape-direction combination, the aiming points with the same 80% probability of shots on goal change by up to 0.3 m vertically, even for the same minimal error size. We highlight the importance for football players to consider not only accuracy/precision, but also error shape and direction to optimise motor planning., Competing Interests: Declaration of competing interest There are no conflicts of interest to declare., (Copyright © 2024 Elsevier B.V. All rights reserved.)
- Published
- 2024
- Full Text
- View/download PDF
45. Drought response of tuber genes in processing potatoes (Solanum tuberosum L.) in Japan.
- Author
-
Kawamoto K, Masutomi H, Matsumoto Y, Akutsu K, Momiki R, and Ishihara K
- Subjects
- Japan, Transcriptome genetics, Gene Expression Profiling methods, Genes, Plant genetics, Solanum tuberosum genetics, Solanum tuberosum metabolism, Droughts, Plant Tubers genetics, Plant Tubers metabolism, Gene Expression Regulation, Plant genetics, Stress, Physiological genetics, Plant Proteins genetics, Plant Proteins metabolism
- Abstract
Background: Limited crop production due to lower rainfall has a major impact on the supply and demand of food for the human population. In potato (Solanum tuberosum L.), one of the major crops, there is also concern about a lack of production due to drought stress. Especially the cultivar "Toyoshiro" suitable for processing, has significant reduction in drought yield. Therefore, it is necessary to understand the mechanism of gene expression changes that occur in potato "Toyoshiro" plants and tubers during drought., Methods and Results: Seed potatoes were split in half and one was used as a control plant (CT), and the other was used as a drought-stressed plant (DS). CT was watered daily, and DS watered off to mimic the weather conditions of the Tokachi-Obihiro region in 2021. These tubers were harvested at week 14 and the transcriptome was analyzed. DS plants showed 423 downregulated genes and 197 upregulated genes compared to CT. Factors related to cell wall modification, heat stress response, and phytosterol metabolism were detected among the genes whose expression changed. Moreover, the expression of "Abscisic acid and environmental stress-inducible protein TAS14 like (TAS14)," a molecule reported to be upregulated under drought stress, was also upregulated, and was upregulated expression in all strains that reproduced drought. The localization of this molecule in the nucleus and plasma membrane was confirmed in a mCherry-tagged TAS14 mutant line., Conclusions: Our findings contribute to understanding the survival strategy system of Japanese processing potatoes in response to drought stress., (© 2024. The Author(s), under exclusive licence to Springer Nature B.V.)
- Published
- 2024
- Full Text
- View/download PDF
46. Clinical Features of 544 Patients With Ruptured Aortic Aneurysm - A Report From the Tokyo Acute Aortic Super Network Database.
- Author
-
Akutsu K, Yoshino H, Shimokawa T, Ogino H, Kunihara T, Takahashi T, Usui M, Watanabe K, Yamasaki M, Fujii T, Kawata M, Watanabe Y, Yamamoto T, Kohsaka S, Nagao K, and Takayama M
- Subjects
- Humans, Male, Aged, Female, Retrospective Studies, Aged, 80 and over, Tokyo epidemiology, Middle Aged, Treatment Outcome, Conservative Treatment, Risk Factors, Aortic Rupture mortality, Aortic Rupture epidemiology, Aortic Rupture surgery, Aortic Rupture therapy, Hospital Mortality, Databases, Factual, Endovascular Procedures
- Abstract
Background: Epidemiological data on ruptured aortic aneurysms from large-scale studies are scarce. The aims of this study were to: clarify the clinical course of ruptured aortic aneurysms; identify aneurysm site-specific therapies and outcomes; and determine the clinical course of patients receiving conservative therapy., Methods and Results: Using the Tokyo Acute Aortic Super Network database, we retrospectively analyzed 544 patients (mean [±SD] age 78±10 years; 70% male) with ruptured non-dissecting aortic aneurysms (AAs) after excluding those with impending rupture. Patient characteristics, status on admission, therapeutic strategy, and outcomes were evaluated. Shock or pulselessness on admission were observed in 45% of all patients. Conservative therapy, endovascular therapy (EVT), and open surgery (OS) accounted for 32%, 23%, and 42% of cases, respectively, with corresponding mortality rates of 93%, 30%, and 29%. The overall in-hospital mortality rate was 50%. The prevalence of pulselessness was highest (48%) in the ruptured ascending AA group, and in-hospital mortality was the highest (70%) in the ruptured thoracoabdominal AA group. Multivariable logistic regression analysis indicated in-hospital mortality was positively associated with pulselessness (odds ratio [OR] 10.12; 95% confidence interval [CI] 4.09-25.07), and negatively associated with invasive therapy (EVT and OS; OR 0.11; 95% CI 0.06-0.20)., Conclusions: The outcomes of ruptured AAs remain poor; emergency invasive therapy is essential to save lives, although it remains challenging to reduce the risk of death.
- Published
- 2024
- Full Text
- View/download PDF
47. Pulmonary Mycobacterium avium complex infection with vascular Ehlers-Danlos syndrome: A case report.
- Author
-
Okamura K, Noro R, Tanaka T, Kashiwada T, Tanaka Y, Saito Y, Fujita K, Akutsu K, Sahara T, Kamio K, Yamada T, Kasahara K, and Seike M
- Abstract
A female patient developed multiple intestinal perforations at 31 and 43 years of age. Because of her family history of pneumothorax and intestinal perforation, Ehlers-Danlos syndrome (EDS) was suspected when she visited our hospital at 52 years. She was diagnosed with vascular Ehlers-Danlos syndrome (vEDS) and developed bilateral external iliac artery dissection. A CT scan at the time of admission revealed granular and infiltrative shadows in both lungs with bronchiectasis. The patient was also diagnosed with Mycobacterium avium complex (MAC) pulmonary disease, and drug susceptibility to clarithromycin was confirmed. After treatments with rifampicin, ethambutol, and clarithromycin were started, the acid-fast bacilli cultures taken from sputum were negative, and respiratory symptoms partially improved after about 1 month. vEDS is reportedly associated with lung diseases, such as pneumothorax and cystic lung lesions, but there are few reports of respiratory infections with vEDS. Moreover, there are no reports of complications associated with MAC disease. We report a case of vEDS with rare complications and suggest the possible mechanism of infection., Competing Interests: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (© 2024 The Authors.)
- Published
- 2024
- Full Text
- View/download PDF
48. Analysis of Fatty Acid Composition and Volatile Profile of Powder from Edible Crickets ( Acheta domesticus ) Reared on Apple By-Products.
- Author
-
Umebara I, Akutsu K, Kubo M, Iijima A, Sakurai R, Masutomi H, and Ishihara K
- Abstract
Edible crickets have recently been used as a new alternative protein source with high nutritional value. The nutritional and flavor-related value of edible crickets varies greatly depending on the species, growth conditions and processing conditions. However, few studies have investigated the effects of the diet fed to crickets during their growth phase on flavor. Therefore, in this study, we characterized the flavor-related factors of powder from crickets reared on apple by-products (ACP) by comparing them with those of powder from crickets reared on a control diet (CCP). The fatty acid composition and volatile compounds of each powder were determined using gas chromatography and mass spectrometry, followed by sensory analysis and color measurement. A decrease in unsaturated fatty acids, specifically γ-linolenic acid, α-linolenic acid, arachidonic acid and docosahexaenoic acid, was observed in ACP. A total of 50 volatile compounds were identified, of which 11 were present in only ACP, while 39 were found in both powders. The sensory analysis showed that the overall balance score of ACP was higher than that of CCP, and according to the color measurements, ACP was darker than CCP. These differences between CCP and ACP might have been due to the differences in the chemical composition of the diets fed to the crickets during their growth phase. The results of this study suggest that one of the factors determining the food value of edible crickets, especially in terms of flavor, is the diet they are fed during their growth phase.
- Published
- 2024
- Full Text
- View/download PDF
49. Successful redo open thoracoabdominal aortic aneurysm surgery in a patient with vascular Ehlers-Danlos syndrome: A case report.
- Author
-
Akutsu K, Ozaki K, Oshima S, Sakurai S, Hirokami T, Hirai Y, Okiyama M, Kishinami G, Ishiko K, Yamaguchi K, and Yamamoto S
- Abstract
We report a case of a 63-year-old woman diagnosed with vascular Ehlers-Danlos syndrome (vEDS) who survived two prophylactic surgeries for the dilatation of a thoracoabdominal aortic aneurysm. She initially developed acute type B aortic dissection at the age of 44 years. Five years later, her dissected descending aorta was enlarged to 54 mm; thus, the descending aorta was replaced as the first surgery. Fortunately, the intra- and post-operative courses were uneventful. Fourteen years post her first surgery, the dissected thoracoabdominal aorta distal to the graft expanded to 53 mm; however, no anastomotic leakage was observed. Genetic testing revealed a COL3A1 abnormality, confirming the diagnosis of vEDS. Thoracoabdominal aorta replacement using deep hypothermia circulatory arrest was performed because of the high risk of aortic aneurysm rupture. The second surgery was performed without complications, and no complications were observed 13 months post-surgery. The major reason for a successful surgery in this patient was the relatively low vascular fragility associated with vEDS. This case demonstrates that there may be considerable individual differences in vascular fragility in patients with vEDS. Thus, surgical repair, along with endovascular therapy, might still be a beneficial option for patients with vEDS having large aortic aneurysms and a high risk of rupture., Learning Objective: Prophylactic surgery for vascular lesions in Ehlers-Danlos syndrome (vEDS) is generally not recommended because of its high vascular fragility. However, if a patient with vEDS has an aortic aneurysm that is at a very high risk of rupture, aggressive treatment is a plausible option as there may be considerable individual differences in vascular fragility among patients with vEDS., Competing Interests: The authors declare that there is no conflict of interest., (© 2024 Japanese College of Cardiology. Published by Elsevier Ltd. All rights are reserved, including those for text and data mining, AI training, and similar technologies.)
- Published
- 2024
- Full Text
- View/download PDF
50. Reply to Gaisendrees et al.
- Author
-
Yamasaki M, Yoshino H, Kunihara T, and Akutsu K
- Published
- 2024
- Full Text
- View/download PDF
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