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Katsumi, Toshiyuki; Yoshida, Yasuhito*; Nakagawa, Ryo*; Yazawa, Shinya*; Kumada, Masashi*; Sato, Daisuke*; Thwe Thwe, A.; Chaumeix, N.*; Kadowaki, Satoshi
Journal of Thermal Science and Technology (Internet), 16(2), p.21-00044_1 - 21-00044_13, 2021/00
Times Cited Count：10 Percentile：41.15(Thermodynamics)The effects of addition of CO
and water vapor on characteristics of dynamic behavior of hydrogen/air premixed flames were elucidated experimentally. By Schlieren photography, wrinkles on the flame surface were clearly observed in low equivalence ratios. The propagation velocity increased monotonically as the flame radius became larger and flame acceleration was found. Increasing the addition of inert gas, the propagation velocity decreased, especially in the case of CO addition. Moreover, the Markstein length and the wrinkling factor decreased. This indicated that the addition of Co or HO promoted the unstable motion of hydrogen flames, which could be due to the enhancement of the diffusive-thermal effect. Based on the characteristics of dynamic behavior of hydrogen flames, the parameters used in the mathematical model on propagation velocity including flame acceleration was obtained, and then the flame propagation velocity under various conditions was predicted.
Aoyama, Yutaka*; Kataoka, Takahiro*; Nakagawa, Shinya*; Sakoda, Akihiro*; Ishimori, Yuu; Mitsunobu, Fumihiro*; Yamaoka, Kiyonori*
Iranian Journal of Radiation Research, 9(4), p.221 - 229, 2012/03
The aim of this study was to analyze the effects of thoron and thermal treatment for aging-related diseases in humans. All subjects inhaled thoron with a high concentration (about 4900 Bq/m
) for 2 weeks. Blood pressures were measured and blood samples were collected after each treatment 1, 2 and 3 weeks after the first treatment. The 
-atrial natriuretic peptide level of the rheumatoid arthritis group was increased and the blood pressure was significantly decreased. Superoxide dismutase activity of rheumatoid arthritis group was significantly increased by treatment. In addition, thoron and thermal treatment significantly enhanced the concanavalin A-induced mitogen response and increased the level of CD4-positive cells; it decreased the level of CD8-positive cells. The results suggest that thoron and thermal treatment activates antioxidative function. Furthermore, these findings suggest that thoron and thermal treatment prevents diabetic ketoacidosis and contributes to the prevention of aging-related diseases. Thoron and thermal therapy may be part of the mechanism for the alleviation of diabetes mellitus and rheumatoid arthritis.
collisions at 
= 200 GeVAdare, A.*; Afanasiev, S.*; Aidala, C.*; Ajitanand, N. N.*; Akiba, Y.*; Al-Bataineh, H.*; Alexander, J.*; Aoki, K.*; Aphecetche, L.*; Armendariz, R.*; et al.
Physical Review D, 84(1), p.012006_1 - 012006_18, 2011/07
Times Cited Count：34 Percentile：75.46(Astronomy & Astrophysics)We report on the event structure and double helicity asymmetry (
) of jet production in longitudinally polarized collisions at = 200 GeV. Photons and charged particles were measured by the PHENIX experiment. Event structure was compared with the results from PYTHIA event generator. The production rate of reconstructed jets is satisfactorily reproduced with the next-to-leading-order perturbative QCD calculation. We measured = -0.0014 
0.0037 at the lowest 
bin and -0.0181 0.0282 at the highest bin. The measured is compared with the predictions that assume various 
distributions.
Kataoka, Takahiro*; Sakoda, Akihiro*; Yoshimoto, Masaaki*; Nakagawa, Shinya*; Toyota, Teruaki*; Nishiyama, Yuichi*; Yamato, Keiko*; Ishimori, Yuu; Kawabe, Atsushi*; Hanamoto, Katsumi*; et al.
Radiation Protection Dosimetry, 146(1-3), p.360 - 363, 2011/07
Times Cited Count：6 Percentile：41.54(Environmental Sciences)Our previous studies showed the possibility that activation of the antioxidative function alleviates various oxidative damages, which are related to lifestyle diseases. Results showed that, low-dose X-ray irradiation activated superoxide dismutase and inhibits oedema following ischaemia-reperfusion. To alleviate ischaemia-reperfusion injury with transplantation, the changes of the antioxidative function in liver graft using low-dose X-ray irradiation immediately after exenteration were examined. Results showed that liver grafts activate the antioxidative function as a result of irradiation. In addition, radon inhalation enhances the antioxidative function in some organs, and alleviates alcohol-induced oxidative damage of mouse liver. Moreover, in order to determine the most effective condition of radon inhalation, mice inhaled radon before or after carbon tetrachloride (CCl
) administration. Results showed that radon inhalation alleviates CCl-induced hepatopathy, especially prior inhalation. It is highly possible that adequate activation of antioxidative functions induced by low-dose irradiation can contribute to preventing or reducing oxidative damages, which are related to lifestyle diseases.
collisions at = 200 and 62.4 GeVAdare, A.*; Afanasiev, S.*; Aidala, C.*; Ajitanand, N. N.*; Akiba, Yasuyuki*; Al-Bataineh, H.*; Alexander, J.*; Aoki, Kazuya*; Aphecetche, L.*; Armendariz, R.*; et al.
Physical Review C, 83(6), p.064903_1 - 064903_29, 2011/06
Times Cited Count：194 Percentile：99.38(Physics, Nuclear)Transverse momentum distributions and yields for 
, and 
in collisions at = 200 and 62.4 GeV at midrapidity are measured by the PHENIX experiment at the RHIC. We present the inverse slope parameter, mean transverse momentum, and yield per unit rapidity at each energy, and compare them to other measurements at different collisions. We also present the scaling properties such as 
and 
scaling and discuss the mechanism of the particle production in collisions. The measured spectra are compared to next-to-leading order perturbative QCD calculations.
, AtRev1 and AtPol
in 
-ray-induced mutagenesisNakagawa, Mayu*; Takahashi, Shinya*; Narumi, Issei; Sakamoto, Ayako
Plant Signaling & Behavior (Internet), 6(5), p.728 - 731, 2011/05
and Au+Au collisions at 
= 200 GeVAdare, A.*; Afanasiev, S.*; Aidala, C.*; Ajitanand, N. N.*; Akiba, Yasuyuki*; Al-Bataineh, H.*; Alexander, J.*; Aoki, Kazuya*; Aphecetche, L.*; Aramaki, Y.*; et al.
Physical Review C, 83(4), p.044912_1 - 044912_16, 2011/04
Times Cited Count：9 Percentile：51.11(Physics, Nuclear)Measurements of electrons from the decay of open-heavy-flavor mesons have shown that the yields are suppressed in Au+Au collisions compared to expectations from binary-scaled collisions. Here we extend these studies to two particle correlations where one particle is an electron from the decay of a heavy flavor meson and the other is a charged hadron from either the decay of the heavy meson or from jet fragmentation. These measurements provide more detailed information about the interaction between heavy quarks and the quark-gluon matter. We find the away-side-jet shape and yield to be modified in Au+Au collisions compared to collisions.
+ collisions at = 200 GeV and scaling properties of hadron productionAdare, A.*; Afanasiev, S.*; Aidala, C.*; Ajitanand, N. N.*; Akiba, Y.*; Al-Bataineh, H.*; Alexander, J.*; Aoki, K.*; Aphecetche, L.*; Armendariz, R.*; et al.
Physical Review D, 83(5), p.052004_1 - 052004_26, 2011/03
Times Cited Count：185 Percentile：98.32(Astronomy & Astrophysics)The PHENIX experiment at RHIC has measured the invariant differential cross section for production of 
, 
, 
and 
mesons in collisions at = 200 GeV. The spectral shapes of all hadron transverse momentum distributions are well described by a Tsallis distribution functional form with only two parameters, 
and 
, determining the high 
and characterizing the low regions for the spectra, respectively. The integrated invariant cross sections calculated from the fitted distributions are found to be consistent with existing measurements and with statistical model predictions.
, AtRev1 and AtPol in UV light-induced mutagenesis in Arabidopsis![$$^{1[W]}$$](/search/images/ERPHWMK1K3OX0JA.gif)
Nakagawa, Mayu*; Takahashi, Shinya*; Tanaka, Atsushi; Narumi, Issei; Sakamoto, Ayako
Plant Physiology, 155(1), p.414 - 420, 2011/01
Times Cited Count：16 Percentile：42.39(Plant Sciences)no abstracts in English
Takahashi, Shinya*; Nakagawa, Mayu; Tanaka, Atsushi; Narumi, Issei; Shimizu, Kikuo*; Sakamoto, Ayako
JAEA-Review 2008-055, JAEA Takasaki Annual Report 2007, P. 58, 2008/11
no abstracts in English
Nakagawa, Shinya*; Kataoka, Takahiro*; Sakoda, Akihiro*; Ishimori, Yuu; Hanamoto, Katsumi*; Yamaoka, Kiyonori*
Radioisotopes, 57(4), p.241 - 251, 2008/04
There are a lot of life style diseases that are related to reactive oxygen species in inductions of the radon therapy, and the further clarification of mechanism is expected. In this study, we investigated the activation of antioxidation function in some organs of mice by radon inhalation using the new radon exposure device. The mice were made to inhale the radon of 400Bq/m or 4000Bq/m with the device. Results show that in brain, lungs, liver and kidney, both the activities of superoxide dismutase and catalase increased, and lipid peroxide levels decreased. This suggests that radon inhalation enhanced the antioxidation function. These findings are important in understanding the mechanism of diseases in which radon therapy is used as treatment, and most of which are called activated oxygen-related diseases.
Sakamoto, Ayako; Nakagawa, Mayu; Takahashi, Shinya*; Tanaka, Atsushi
no journal, ,
Nakagawa, Takahiro; Takada, Chie; Takayasu, Tetsuya*; Kashimura, Shinya*; Tago, Itaru
no journal, ,
no abstracts in English
Nakagawa, Takahiro; Takada, Chie; Tsujimura, Norio; Yamazaki, Takumi; Kashimura, Shinya*
no journal, ,
no abstracts in English
Nakagawa, Mayu; Sakamoto, Ayako; Takahashi, Shinya*; Tanaka, Atsushi; Narumi, Issei
no journal, ,
Nakagawa, Mayu; Takahashi, Shinya*; Sakamoto, Ayako; Tanaka, Atsushi; Narumi, Issei
no journal, ,
no abstracts in English
Nakagawa, Mayu; Sakamoto, Ayako; Takahashi, Shinya*; Tanaka, Atsushi; Narumi, Issei
no journal, ,
no abstracts in English
Nakagawa, Mayu*; Sakamoto, Ayako; Takahashi, Shinya*; Tanaka, Atsushi; Narumi, Issei
no journal, ,
Translesion synthesis (TLS) is a damage tolerance mechanism in which the unrepaired DNA damage is bypassed by the action of specific polymerases. We have previously isolated 
, 
and 
genes, which are homolog of yeast TLS polymerases. Disruption of any of , or made the plants more sensitive to UV than the wild type. To analyze the functions of , and , we further analyzed the UV-induced mutation frequency in 
, 
and 
. As a result, the UV-induced reversion frequencies were significantly lower in and mutants than that in wild-type, while mutants exhibited significantly increased reversion frequency. These results suggest that r , and genes play an important role in the UV-induced mutation mechanism.
Nakagawa, Mayu; Sakamoto, Ayako; Takahashi, Shinya*; Tanaka, Atsushi; Narumi, Issei
no journal, ,
no abstracts in English
Nakagawa, Mayu; Sakamoto, Ayako; Takahashi, Shinya*; Tanaka, Atsushi; Narumi, Issei
no journal, ,
no abstracts in English
