A5087764903- Effects of Radiation Exposure
- Plant tissue culture and regeneration
- Crystallography and Radiation Phenomena
- Radiation Therapy and Dosimetry
- Superconducting Materials and Applications
- X-ray Spectroscopy and Fluorescence Analysis
- Physics of Superconductivity and Magnetism
- X-ray Diffraction in Crystallography
- Plant Reproductive Biology
- High-pressure geophysics and materials
- Magnetic Properties of Alloys
- Advanced X-ray Imaging Techniques
- Rare-earth and actinide compounds
- Cell death mechanisms and regulation
- Biochemical effects in animals
- Quantum, superfluid, helium dynamics
- Particle physics theoretical and experimental studies
- Cancer, Hypoxia, and Metabolism
- Particle Detector Development and Performance
- Carcinogens and Genotoxicity Assessment
- DNA Repair Mechanisms
- Cancer-related Molecular Pathways
- Plant Genetic and Mutation Studies
- Melanoma and MAPK Pathways
- Glutathione Transferases and Polymorphisms
National Institutes for Quantum Science and Technology
2009-2023
Tohoku University
1993-2019
Institute of Agrobiological Sciences
2017-2018
Instituto de Ciencia de Materiales de Madrid
2012
Saitama Institute of Technology
2008-2011
National Institute for Radiological Protection
2007-2010
Idemitsu Kosan (Japan)
2009
NTL Institute for Applied Behavioral Science
2003-2007
Yerevan State University
2006
A.V. Shubnikov Institute of Crystallography
2005
A resonance-type X-ray magnetic scattering at the K -absorption edge was first observed in 220 Bragg reflection of ferromagnetic Ni single crystal. Further a theoretical discussion on resonance curve carried out; difference oscillator-strength density for each direction spins also derived from this curve. The minority spin excesses that majority between Fermi level and 25 eV above level. amounts to about 1×10 -4 /Ry maximum.
The magneto-volume effect of the weak itinerant ferromagnet MnSi has been studied by measuring both thermal expansion over a wide range temperature and forced volume megnetostriction at different temperatures. magnetostriction 4.2 K as well magnetic 10 kOe, Δω m ( H , T ) can be described formula )= C Δ[ M ST 2 ] with =1.5×10 -10 (mol/emu) where is change square magnetization polarization d band. spontaneous 0 K, (0,0) related to \(\Delta\omega_{\text{m}}(0,0){\doteqdot}(2/5)KC\ M(0,0)^{2}\)...
Although conventional radiotherapy promotes the migration/invasion of cancer stem cells (CSCs) under normoxia, carbon ion (C-ion) irradiation actually decreases these processes. Unraveling mechanisms this discrepancy, particularly hypoxic conditions that pertain in niches where CSCs are preferentially localized, would provide a better understanding origins metastases. Invasion/migration, proteins involved epithelial-to-mesenchymal transition (EMT), and expression MMP-2 HIF-1α were quantified...
X-ray diffraction of black phosphorus and phosphorus-arsenic alloys with composition ${\mathrm{P}}_{1\mathrm{\ensuremath{-}}\mathit{x}}$${\mathrm{As}}_{\mathit{x}}$ (x=0.05,0.1) has been carried out synchrotron radiation at low temperatures high pressures. The first transition from the orthorhombic to rhombohedral state started around 7.5 GPa 21 K. pressure K is about 3 higher than that room temperature. phases coexisted over range 7.5--10.5 second a simple-cubic phase appeared 12 GPa....
Measuring global gene expression using cDNA or oligonucleotide microarrays is an effective approach to understanding the complex mechanisms of effects radiation. However, few studies have been carried out that investigate in vivo after prolonged exposure low-dose-rate In this study, C57BL/6J mice were continuously irradiated with gamma-rays for 485 days at dose-rates 0.032-13 microGy/min. Gene profiles kidney and testis from unirradiated analyzed, differentially expressed genes identified. A...
Using velocity-analyzed cold neutrons we observed the production of ultracold in superfluid $^{4}\mathrm{He}$ at 0.45 to 1.5 K. Ultracold are produced for an incident neutron wavelength 8.78\ifmmode\pm\else\textpm\fi{}0.06 \AA{} which agrees with single-phonon emission theory. The temperature variation ultracold-neutron storage lifetime is also discussed.
Exposure to ionizing radiation was shown result in an increased risk of breast cancer. There is strong evidence that steroid hormones influence radiosensitivity and cancer risk. Tumors may be initiated by a small subpopulation stem cells (CSCs). In order assess whether the modulation radiation-induced could involve CSCs, we measured flow cytometry proportion CSCs irradiated cell lines after progesterone estrogen treatment. Progesterone stimulated expansion CSC compartment both receptor...
Both exposure to ionizing radiation and obesity have been associated with various pathologies including cancer. There is a crucial need in better understanding the interactions between effects (especially at low doses) other risk factors, such as obesity. In order evaluate responses obese animals, C3H C57BL/6J mice fed control normal fat or high (HF) diet were exposed fractionated doses of X-rays (0.75 Gy ×4). Bone marrow micronucleus assays did not suggest modulation radiation-induced...
Based upon thermodynamical theory of a phase transition the second kind, effect pressure on Curie temperature in Invar-type iron-platinum alloys with order-disorder has been estimated from measurements dependences magnetization and magnetostriction. Onset atomic ordering tends to decrease temperature. But, contrary this tendency, change quenched is smaller than expected value. The discontinuity Δ C p specific heat at also by Landau's formula. quantity disordered state larger that ordered...
The cause and progression of Alzheimer's disease (AD) are poorly understood. Possible cognitive behavioral consequences induced by low-dose radiation important because humans exposed to ionizing from various sources. Early transcriptional response in murine brain X-rays (100 mGy) has been reported, suggesting alterations molecular networks pathways associated with functions, advanced aging AD. To investigate acute late transcriptional, pathological radiation, we applied an dose 100-mGy total...
The superconducting transition temperatures of copper sulfide CuS are measured as a function hydrostatic pressure up to about 9 katm by an ice bomb technique. is detected with the ac Hartshorn mutual inductance bridge. In contrast ordinary superconductors curve shift temperature increasing decreases nonlinearly downward curvature over whole range applied perssures and its slope changes discontinuously at 3.5 katm. maximum peak imaginary part susceptibility vanishes under pressures above 1.6...
Abstract DNA double-strand breaks (DSBs) induced by photon irradiation are the most deleterious damage for cancer cells and their efficient repair may contribute to radioresistance, particularly in hypoxic conditions. Carbon ions (C-ions) act independently of oxygen concentration trigger complex- clustered-DSBs difficult repair. Understanding interrelation between hypoxia, radiation-type, DNA-repair is therefore essential overcoming radioresistance. The DSBs signaling contribution canonical...
X-ray dynamical diffraction induced only by the imaginary part of scattering factor was measured using a Ge perfect crystal. The 844 integrated reflecting intensities near K-absorption edge were in both Bragg and Laue cases. show characteristic variations for having no real part, which agree well with theoretical predictions. There remains slight difference between [Fukamachi & Kawamura (1993). Acta Cryst. A49, 384–388] experimental energy position at this occurs, is related to fine...
The anions of (TMTSF) 2 ClO 4 order below about 24 K. speed at which this transition is passed has a drastic influence on the low temperature electronic properties salt. We determined as function cooling rate number ordered well average size domains. A high resolution X-ray synchrotron radiation study showed that exhibited very unusual features probably due to coupling with angular deformations Bravais lattice during ordering process. investigated also kinetics Ising parameter describing...
Hypoxia-Inducible Factor 1α (HIF-1α), which promotes cancer cell survival, is the main regulator of oxygen homeostasis. Hypoxia combined with photon and carbon ion irradiation (C-ions) stabilizes HIF-1α. Silencing HIF-1α under hypoxia leads to substantial radiosensitization Head-and-Neck Squamous Cell Carcinoma (HNSCC) cells after both photons C-ions. Thus, this study aimed clarify a potential involvement in detection, signaling, repair DNA Double-Strand-Breaks (DSBs) response irradiations,...
An adaptive response was demonstrated during embryogenesis in mice. Whole-body irradiation at a dose of 0-50 cGy given to condition pregnant ICR mice on day 9 11 gestation. Then their whole bodies were exposed challenging 5 Gy the next day. The numbers living fetuses, prenatal deaths and fetuses with external gross malformations determined 19. A conditioning 30 significantly increased rate reduced incidence congenital induced by 5-Gy 12. This indicates existence critical timing for...