599 results match your criteria: "Central Research Institute of Electric Power Industry[Affiliation]"

Article Synopsis
  • Mouse models are crucial for studying the risk of cancer due to environmental factors like ionizing radiation, but their results don't directly translate to humans due to differences in how each species responds to radiation exposure.
  • Researchers created a mathematical model to understand the differences in cancer risk between humans and mice, using data from Japanese atomic bomb survivors and lifespan studies on mice.
  • The model suggests that radiation exposure shifts the age at which cancer risk increases for both species, but this shift occurs much more significantly in humans, largely due to differences in mutation rates between the two species, which could help better predict cancer risk in humans based on mouse studies.
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Cataracts are one of the leading causes of blindness, with an estimated 95 million people affected worldwide. A hallmark of cataract development is lens opacification, typically associated not only with aging but also radiation exposure as encountered by interventional radiologists and astronauts during the long-term space mission. To better understand radiation-induced cataracts, the adverse outcome pathway (AOP) framework was used to structure and evaluate knowledge across biological levels of organization (e.

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Cancer and Non-Cancer Effects Following Ionizing Irradiation.

Cancers (Basel)

March 2024

Biology and Environmental Chemistry Division, Sustainable System Research Laboratory, Central Research Institute of Electric Power Industry (CRIEPI), Chiba 270-1194, Japan.

On the one hand, ionizing radiation has been used to treat not only cancer, but also non-cancer diseases. On the other hand, associations with radiation exposure have increasingly been reported not only for cancer, but also non-cancer diseases, both at doses or dose rates much lower than previously suggested or considered. This underscores the need for considering both cancer and non-cancer effects of medical (diagnostic or therapeutic), occupational or environmental exposure to radiation.

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A generalisation of the method of regression calibration and comparison with Bayesian and frequentist model averaging methods.

Sci Rep

March 2024

Department of Epidemiology and Biostatistics, School of Medicine, University of California, San Francisco, 550 16th Street, 2nd Floor, San Francisco, CA, 94143, USA.

For many cancer sites low-dose risks are not known and must be extrapolated from those observed in groups exposed at much higher levels of dose. Measurement error can substantially alter the dose-response shape and hence the extrapolated risk. Even in studies with direct measurement of low-dose exposures measurement error could be substantial in relation to the size of the dose estimates and thereby distort population risk estimates.

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Fluorescent dyes are commonly used as conservative groundwater tracers to track the migration of water. Over- or underestimation of important parameters such as the water flow rate can occur if the concentration of a dye is changed by unexpected reactions. Because such errors may seriously affect the results of experiments, the reactions and processes that change fluorescent dye concentrations need to be understood.

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Article Synopsis
  • A new model was created to estimate how quickly phytochromes, plant light receptors, reach a balanced state under different lighting conditions by solving differential equations related to their active and inactive forms.
  • It was found that about 90% of the changes in phytochrome balance are achieved with roughly 3.4 mmol m of far-red light, and 99% with about 6.9 mmol m, though these amounts can vary with light's spectral conditions.
  • The study also revealed that the rate of reaching this balance is fastest under red light, followed by far-red, green, and blue light, suggesting this model could help optimize plant growth in horticulture using artificial lighting.
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Following the accident at the Fukushima Dai-ichi Nuclear Power Station, radiocaesium concentrations were specifically elevated in rockfish species compared to other fish species. To clarify the likely reasons, a caesium metabolic rate in the Japanese rockfish Sebastes cheni was derived by an aquarium experiment of live fish collected from the area off Fukushima. Stable caesium and Cs concentration in prey organisms, stomach contents and muscle of rockfish were measured and the bioavailable fraction in prey organisms was evaluated.

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Offshore wind power (OWP) is a promising way to achieve decarbonization and tackle global climate change, but acceptance by residents is an important issue for site location. Information provision could be a more cost-effective intervention than debates or subsidies, assuming that scientifically correct information alone is insufficient and information design to boost the message effects considering realistic human responses is necessary. Thus, we designed nudging messages to increase acceptance of OWP, using a message framework to moderate risk-averse attitudes by reminding readers of familial support based on insights from kin selection theory from evolutionary psychology.

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A generalisation of the method of regression calibration and comparison with Bayesian and frequentist model averaging methods.

ArXiv

March 2024

Department of Epidemiology and Biostatistics, School of Medicine, University of California, San Francisco, 550 16th Street, 2nd floor, San Francisco, CA 94143, USA.

For many cancer sites low-dose risks are not known and must be extrapolated from those observed in groups exposed at much higher levels of dose. Measurement error can substantially alter the dose-response shape and hence the extrapolated risk. Even in studies with direct measurement of low-dose exposures measurement error could be substantial in relation to the size of the dose estimates and thereby distort population risk estimates.

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Radiotherapy for non-cancer diseases: benefits and long-term risks.

Int J Radiat Biol

March 2024

Biology and Environmental Chemistry Division, Sustainable System Research Laboratory, Central Research Institute of Electric Power Industry (CRIEPI), Abiko, Chiba, Japan.

Purpose: The discovery of X-rays was followed by a variety of attempts to treat infectious diseases and various other non-cancer diseases with ionizing radiation, in addition to cancer. There has been a recent resurgence of interest in the use of such radiotherapy for non-cancer diseases. Non-cancer diseases for which use of radiotherapy has currently been proposed include refractory ventricular tachycardia, neurodegenerative diseases (e.

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"Farm HACCP" incorporates the concept of Hazard Analysis and Critical Control Points (HACCP) into farm animal husbandry and sanitation management to ensure the safety of livestock products and improve productivity. Implementing farm HACCP may reduce the emission of volatile organic compounds (VOCs), which are derived from livestock manure and are responsible for odors, PM , and photochemical oxidants. In this study, the effects of implementing farm HACCP on the emissions, composition, and environmental impact of VOCs from sheds were evaluated.

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A generalisation of the method of regression calibration and comparison with the Bayesian 2-dimensional Monte Carlo method.

Res Sq

December 2023

Department of Epidemiology and Biostatistics, School of Medicine, University of California, San Francisco, 550 16 Street, 2 floor, San Francisco, CA 94143, USA.

For many cancer sites it is necessary to assess risks from low-dose exposures via extrapolation from groups exposed at moderate and high levels of dose. Measurement error can substantially alter the shape of this relationship and hence the derived population risk estimates. Even in studies with direct measurement of low-dose exposures measurement error could be substantial in relation to the size of the dose estimates and thereby distort population risk estimates.

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Background: The COVID-19 pandemic has revealed the fragility of the global food system, sending shockwaves across countries' societies and economy. This has presented formidable challenges to sustaining a healthy and resilient lifestyle. The objective of this study is to examine the food consumption patterns and assess diet diversity indicators, primarily focusing on the food consumption score (FCS), among households in 38 countries both before and during the first wave of the COVID-19 pandemic.

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An antifouling polymer brush-like structure was fabricated by a simple and versatile dip-coating method of sulfobetaine containing copolymer-grafted silica nanoparticles (SiNPs) and alkyl diiodide cross-linkers. Surface-initiated atom transfer radical copolymerization of 3-(-2-methacryloyloxyethyl--dimethyl)ammonatopropanesulfonate (MAPS) and -dimethylaminoethyl methacrylate (DMAEMA) was carried out from initiator-immobilized SiNPs to give poly(MAPS--DMAEMA)-grafted SiNPs (MAPS/DMAEMA = 9/1, mol/mol) with diameters of 150-170 nm. The SiNP--copolymer/2,2,2-trifluoroethanol solution was dip-coated on silicon and glass substrates.

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Cyclic electron transfer (CET) predominates when NADP is at basal levels, early in photosynthetic induction; however, the mechanism underlying the subsequent supply of NADP to fully drive steady-state linear electron transfer remains unclear. Here, we investigated whether CET is involved in de novo NADP supply in Arabidopsis thaliana and measured chloroplastic NADP dynamics to evaluate responsiveness to variable light, photochemical inhibitors, darkness, and CET activity. The sum of oxidized and reduced forms shows that levels of NADP and NAD increase and decrease, respectively, in response to light; levels of NADP and NAD decrease and increase in the dark, respectively.

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Radioactive cesium (Cs) is distributed in the world's oceans as a result of global fallout from atmospheric nuclear weapons tests, releases from fuel reprocessing plants, and inputs from nuclear power plant accident. In order to detect future radionuclide contamination, it is necessary to establish a baseline global distribution of radionuclides such as Cs and to understand the ocean transport processes that lead to that distribution. In order to aid in the interpretation of the observed database, we have conducted a suite of simulations of the distribution of Cs using a global ocean general circulation model (OGCM).

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Photochemical oxidants (O; mainly O) are a concern in East Asia. Because of the prevailing westerly wind in the midlatitudes, O concentration generally shows a high in spring over Kyushu Island, western Japan, and O warnings have been issued in spring. However, the record from 2000 to 2021 of O warning days in Kyushu Island contains one warning case in autumn 2020.

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A generalisation of the method of regression calibration.

Sci Rep

September 2023

Department of Epidemiology and Biostatistics, School of Medicine, University of California, San Francisco, 550 16th Street, 2nd Floor, San Francisco, CA, 94143, USA.

There is direct evidence of risks at moderate and high levels of radiation dose for highly radiogenic cancers such as leukaemia and thyroid cancer. For many cancer sites, however, it is necessary to assess risks via extrapolation from groups exposed at moderate and high levels of dose, about which there are substantial uncertainties. Crucial to the resolution of this area of uncertainty is the modelling of the dose-response relationship and the importance of both systematic and random dosimetric errors for analyses in the various exposed groups.

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A generalisation of the method of regression calibration.

Res Sq

August 2023

Department of Epidemiology and Biostatistics, School of Medicine, University of California, San Francisco, 550 16 Street, 2 floor, San Francisco, CA 94143, USA.

There is direct evidence of risks at moderate and high levels of radiation dose for highly radiogenic cancers such as leukaemia and thyroid cancer. For many cancer sites, however, it is necessary to assess risks via extrapolation from groups exposed at moderate and high levels of dose, about which there are substantial uncertainties. Crucial to the resolution of this area of uncertainty is the modelling of the dose-response relationship and the importance of both systematic and random dosimetric errors for analyses in the various exposed groups.

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We conducted a detailed geological survey of the Sendai region, covering an area of 100 × 50 km. Our survey focused on accurately mapping river terraces, identifying the source volcanoes responsible for intercalated tephras, and locating the Nagamachi-Rifu fault and associated faults. The river terraces were observed and categorized based on their elevation relative to the present river channels.

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KMT2A-AFF1 (MLL-AF4), formed by chromosomal translocation t(4;11), is observed specifically in infant pro-B acute lymphoblastic leukemia, and the main driver of leukemogenesis. In this study, a human induced pluripotent stem cell (hiPSC) line harboring KMT2A-AFF1 (IMSUTi002-A-2), which has the ability to simultaneously induce the doxycycline-inducible expression of KMT2A-AFF1 and EGFP, was established. This hiPSC can be a powerful model for understanding infant leukemia and risk assessment of leukemogenesis.

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Article Synopsis
  • The study examines how the combination of spin-orbit coupling and crystal symmetry in thin materials can create unique spin-polarized bands, which could result in new physical properties.
  • Specifically, it discusses bilayer materials where breaking inversion symmetry can lead to oppositely polarized spins in different layers.
  • The research demonstrates that growing a Tl bilayer on Ag(111) with lattice mismatch reveals hidden spins and creates a new phenomenon of band splitting in both spin and space, achieved by carefully tuning the interface interaction strength.
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Sparing and enhancing dose protraction effects for radiation damage to the aorta of wild-type mice.

Int J Radiat Biol

January 2024

Department of Regenerative Medicine, Division of Radiation Medical Science, Research Institute for Radiation Biology and Medicine, Hiroshima University, Hiroshima, Japan.

Purpose: Our previous work indicated the greater magnitude of damage to the thoracic aorta at 6 months after starting 5 Gy irradiation in descending order of exposure to X-rays in 25 fractions > acute X-rays > acute γ-rays > X-rays in 100 fractions ≫ chronic γ-rays, in which the limitations of the study included a lack of data for fractionated γ-ray exposure. To better understand effects of dose protraction and radiation quality, the present study examined changes after exposure to γ-rays in 25 fractions, and compared its biological effectiveness with five other irradiation regimens.

Materials And Methods: Male C57BL/6J mice received 5 Gy of Cs γ-rays delivered in 25 fractions spread over six weeks.

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Car-borne survey and dose assessment from external radiation exposure in Bangka Island.

Environ Sci Pollut Res Int

August 2023

Research Center for Safety, Metrology, and Nuclear Technology, The National Research and Innovation Agency of Indonesia (BRIN), Tangerang Selatan, 15314, Banten, Indonesia.

With a history of more than 200 years of tin mining, Bangka Island has brought along a byproduct of heavy minerals containing radionuclide elements. There are some concerns about this byproduct material contributing to natural radiation in the environment. In this study, a car-borne survey was conducted to accurately assess natural background radiation in Bangka Island.

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