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Carbon accumulation model for simulating 14C radioactivity in Chinese yam grown from a seed bulbil. 模拟鳞茎种子生长的中国山药中 14C 放射性的碳积累模型。
IF 0.8 4区 环境科学与生态学
Radiation protection dosimetry Pub Date : 2024-11-13 DOI: 10.1093/rpd/ncae026
Takashi Tani, Ryuji Arai
{"title":"Carbon accumulation model for simulating 14C radioactivity in Chinese yam grown from a seed bulbil.","authors":"Takashi Tani, Ryuji Arai","doi":"10.1093/rpd/ncae026","DOIUrl":"https://doi.org/10.1093/rpd/ncae026","url":null,"abstract":"<p><p>Modeling carbon accumulation in crop plants is key to evaluating the transfer of atmospheric 14C into the edible parts of the plants growing near nuclear facilities. Chinese yam 'Nagaimo' (Dioscorea polystachya Turcz.) is a major crop cultivated near a spent nuclear fuel reprocessing plant in Rokkasho, Aomori, Japan. We developed a dynamic compartment model for assessing carbon and 14C accumulation in Chinese yam grown from a seed bulbil in the field. Light and temperature dependence of leaf photosynthesis and temperature dependence of respiration in leaves, stems and belowground parts (tuber and root) were incorporated into the model. Estimated amounts of carbon in the leaves, stems and belowground parts were good agreement with the measured data from the field. Simulation results of 14C accumulation using this model indicated that the accumulation of 14C in belowground parts at the harvest depends on the rate of photosynthesis on the day of exposure.</p>","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142626259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Atmospheric concentrations of 7Be and 210Pb in weekly aerosols at Hirosaki, a heavy snowfall area in Japan. 日本大雪地区弘前每周气溶胶中 7Be 和 210Pb 的大气浓度。
IF 0.8 4区 环境科学与生态学
Radiation protection dosimetry Pub Date : 2024-11-13 DOI: 10.1093/rpd/ncae156
Khemruthai Kheamsiri, Oumar Bobbo Modibo, Bagus Sidik Waskito Hadi, Haruka Kuwata, Ryohei Yamada, Chutima Kranrod, Naofumi Akata
{"title":"Atmospheric concentrations of 7Be and 210Pb in weekly aerosols at Hirosaki, a heavy snowfall area in Japan.","authors":"Khemruthai Kheamsiri, Oumar Bobbo Modibo, Bagus Sidik Waskito Hadi, Haruka Kuwata, Ryohei Yamada, Chutima Kranrod, Naofumi Akata","doi":"10.1093/rpd/ncae156","DOIUrl":"https://doi.org/10.1093/rpd/ncae156","url":null,"abstract":"<p><p>To understand the regional properties of atmospheric 7Be and 210Pb concentrations at Hirosaki, aerosol samples were collected weekly for the investigation. Total suspended particles (TSP) concentration ranged from 0.14 to 1.19 mg m-3 with a mean value of 0.29 ± 0.08 mg m-3. The activity concentrations during the observation period have shown a similar trend between 7Be and 210Pb, comparable to reported studies. The activity concentrations of 7Be and 210Pb ranged from 0.46 to 4.94 mBq m-3 with an average of 2.22 mBq m-3 and from 0.26 to 1.29 mBq m-3 with an average of 0.64 mBq m-3, respectively. The relation between precipitation and radionuclide concentrations indicated that precipitation is an essential factor in the radionuclide removal process. The rainfall/snowfall had a significant impact on the deposition, and the process was greatly affected by the changes in the features of raindrops and snowflakes, such as intensity, shape, surface area, and falling speed.</p>","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142626328","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Absorption and translocation to fruit for cesium applied on apple tree leaf surface. 苹果树叶面对铯的吸收和向果实的转移。
IF 0.8 4区 环境科学与生态学
Radiation protection dosimetry Pub Date : 2024-11-13 DOI: 10.1093/rpd/ncae069
Hitoshi Kawabata, Masumi Yanai, Yuichi Takaku, Shun'ichi Hisamatsu
{"title":"Absorption and translocation to fruit for cesium applied on apple tree leaf surface.","authors":"Hitoshi Kawabata, Masumi Yanai, Yuichi Takaku, Shun'ichi Hisamatsu","doi":"10.1093/rpd/ncae069","DOIUrl":"https://doi.org/10.1093/rpd/ncae069","url":null,"abstract":"<p><p>We investigated the behavior of stable Cs+ ions contained in droplets applied directly on the leaf surfaces of plumleaf crab apple trees (2-3 years old Malus domestica 'Alps Otome') at three different fruit growing stages: before bearing fruit, early fruit development and late fruit development stages. Most of the Cs was rapidly transferred from the leaf surfaces into the applied leaves after application, and then gradually transferred to the fruit through the branches. The mean proportion of Cs transferred to fruit by harvest time ranged from 11 to 30% not directly depending on the fruit growing stages. Cs absorption from leaf surfaces was faster at early and late fruit development stages than before bearing fruit stage, and Cs transfer from leaf surfaces to the fruit was faster as the fruit growing stage progressed. To describe the transfer of Cs, we constructed a compartment model using the datasets of obtained for each fruit growing stage. However, it did not well reproduce the measured values, showing that further studies are necessary.</p>","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142625926","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
An efficient and simple method for enriching metaphase cells for dicentric chromosome assay. 一种高效简便的方法，可富集转移相细胞进行双中心染色体检测。
IF 0.8 4区 环境科学与生态学
Radiation protection dosimetry Pub Date : 2024-11-13 DOI: 10.1093/rpd/ncae048
Ryo Nakayama, Thanh-Mai Tran, Donovan Anderson, Kai Takebayashi, Valerie Swee Ting Goh, Yohei Fujishima, Tomisato Miura
{"title":"An efficient and simple method for enriching metaphase cells for dicentric chromosome assay.","authors":"Ryo Nakayama, Thanh-Mai Tran, Donovan Anderson, Kai Takebayashi, Valerie Swee Ting Goh, Yohei Fujishima, Tomisato Miura","doi":"10.1093/rpd/ncae048","DOIUrl":"https://doi.org/10.1093/rpd/ncae048","url":null,"abstract":"<p><p>As compared to peripheral blood mononuclear cell (PBMC) culture, a lower mitotic index (MI) is seen in whole blood (WB) culture, but WB can be directly used for culture in dicentric chromosome assay (DCA). The purpose of this study is to develop a simple protocol for metaphase enrichment to improve the metaphase frequency of WB culture. Fixed cells were obtained after performing WB and PBMC cultures for DCA after conventional fixation. An additional low-speed centrifugation of 200 × g for 1 min was performed, separating the fixed cells of WB culture into a pellet and a supernatant fraction. The additional low-speed centrifugation enriched metaphase frequency and provided an MI comparable to the PBMC culture in the pellet fraction. Our study suggests that it is possible to increase the number of metaphase cells on slides using the slow centrifugation method, which could contribute to the efficiency of chromosome aberration analysis in biodosimetry.</p>","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142625860","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Assessment of air dose distribution in the vertical plane for better occupational exposure management. 评估垂直面的空气剂量分布，改善职业暴露管理。
IF 0.8 4区 环境科学与生态学
Radiation protection dosimetry Pub Date : 2024-11-13 DOI: 10.1093/rpd/ncae150
Tomuhiro Noro, Minoru Osanai, Shota Hosokawa, Maiko Kitajima, Megumi Tsushima, Kohsei Kudo
{"title":"Assessment of air dose distribution in the vertical plane for better occupational exposure management.","authors":"Tomuhiro Noro, Minoru Osanai, Shota Hosokawa, Maiko Kitajima, Megumi Tsushima, Kohsei Kudo","doi":"10.1093/rpd/ncae150","DOIUrl":"10.1093/rpd/ncae150","url":null,"abstract":"<p><p>The International Commission on Radiological Protection recommended a significant reduction of the equivalent dose limit for the eye lens. Reportedly, medical staff in charge of diagnostic imaging procedures may exceed the new dose limits for the eye lens. The use of dosimeters dedicated to the eye lens remains low, and dosimeters for the neck region were often used to assess eye lens doses. However, measurements by neck badges may overestimate or underestimate the recommended eye lens doses because the height of the neck differs from that of the eye. This study aimed to evaluate the air dose distribution in the vertical plane to understand the difference between neck and eye doses. H*(10) in the height of the eye position was 52.8% lower than that in the height of the neck position in the under-table position. Thus, the equivalent eye lens dose evaluated using a neck badge dosimeter may be overestimated.</p>","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11561573/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142626134","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
ESR measurement of carbonated hydroxyapatite for dosemeter. 用于剂量计的碳化羟基磷灰石 ESR 测量。
IF 0.8 4区 环境科学与生态学
Radiation protection dosimetry Pub Date : 2024-11-13 DOI: 10.1093/rpd/ncae147
Hajime Seito, Eri Yokozuka, Toshitaka Oka, Yoshihiro Kitatsuji, Naotsugu Nagasawa
{"title":"ESR measurement of carbonated hydroxyapatite for dosemeter.","authors":"Hajime Seito, Eri Yokozuka, Toshitaka Oka, Yoshihiro Kitatsuji, Naotsugu Nagasawa","doi":"10.1093/rpd/ncae147","DOIUrl":"https://doi.org/10.1093/rpd/ncae147","url":null,"abstract":"<p><p>We have examined a dosimetry characteristic of carbonate hydroxyapatite (CO3HAp), which is a dental bone graft material. The purpose of this work is to investigate the reproducibility and stability of radiation-induced radicals on CO3HAp samples and assess the feasibility of using these materials as dosemeters. CO3HAp samples were exposed to gamma rays with dose range from 10 to 10 000 Gy. The electron spin resonance (ESR) spectra for irradiated samples were measured. Variation of peak-to-peak amplitude of the ESR signal intensity as a function of absorbed dose for CO3HAp was compared with that for alanine dosemeters, suggesting that the CO3HAp sample has a good linear dose response in the range from 10 to 10 000 Gy as well as does the alanine dosemeters.</p>","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142626643","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Radiocarbon in aquatic biota samples in a brackish lake adjacent to a reprocessing plant in Rokkasho, Japan, from 2006 to 2022. 2006 年至 2022 年日本六所后处理厂附近咸水湖水生生物群样本中的放射性碳。
IF 0.8 4区 环境科学与生态学
Radiation protection dosimetry Pub Date : 2024-11-13 DOI: 10.1093/rpd/ncae077
Shinji Ueda, Hideki Kakiuchi, Hidenao Hasegawa
{"title":"Radiocarbon in aquatic biota samples in a brackish lake adjacent to a reprocessing plant in Rokkasho, Japan, from 2006 to 2022.","authors":"Shinji Ueda, Hideki Kakiuchi, Hidenao Hasegawa","doi":"10.1093/rpd/ncae077","DOIUrl":"https://doi.org/10.1093/rpd/ncae077","url":null,"abstract":"<p><p>The commercial spent-nuclear-fuel reprocessing plant in Rokkasho, Japan, is scheduled for completion in 2024. Its fuel rods were cut into segments and chemically processed between 2006 and 2008, as part of the plant's test operations. During the test, 14C (4.4 TBq) were discharged from the plant's main stack into the atmosphere. At reprocessing plants, 14C has the largest contribution to the effective dose to the public among the nuclides released into the atmosphere, and it important to understand the concentration distribution and impact of 14C in the surrounding environment. This study conducts a continuous monitoring of 14C in aquatic biota samples around the plant from 2006 to 2022. The 14C concentration in most samples was determined at the background level, and the effect of the plant was slightly recognized in some samples. Moreover, the specific radioactivity of 14C decreased faster than the theoretical decay from 0.242 to 0.225 Bq-g C-1.</p>","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142626911","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Behavior of radioactive cesium concentration for 13 years after FDNPP accident at Koriyama campus of Nihon University, Fukushima, Japan. 日本福岛县日本大学郡山校区在 FDNPP 事故后 13 年的放射性铯浓度变化。
IF 0.8 4区 环境科学与生态学
Radiation protection dosimetry Pub Date : 2024-11-13 DOI: 10.1093/rpd/ncae082
Ryoko Suzuki, Katsuhiko Okuyama, Kohei Chiba, Taiki Hashimoto, Natsumi Katsumata, Azusa Ukitsu, Khemruthai Kheamsiri, Ryohei Yamada, Naofumi Akata
{"title":"Behavior of radioactive cesium concentration for 13 years after FDNPP accident at Koriyama campus of Nihon University, Fukushima, Japan.","authors":"Ryoko Suzuki, Katsuhiko Okuyama, Kohei Chiba, Taiki Hashimoto, Natsumi Katsumata, Azusa Ukitsu, Khemruthai Kheamsiri, Ryohei Yamada, Naofumi Akata","doi":"10.1093/rpd/ncae082","DOIUrl":"https://doi.org/10.1093/rpd/ncae082","url":null,"abstract":"<p><p>The concentration of the radioactive cesium (134Cs and 137Cs) in soils and in atmospheric fallouts has been measured at the Koriyama campus, Nihon University, after the Fukushima Dai-ichi Nuclear Power Plant accident for 13 y, from October 2011 till September 2023 and now ongoing. The concentration of them decreased very rapidly due to decontamination activities and weathering effects, with an environmental half-life of 1.21 and 2.82 y in soils, with those of 1.58 and 2.08 y in atmospheric fallouts for 134Cs and 137Cs, respectively. The behavior of the decrease was not simple, due to particles raised from the surface soil in wooded areas that had not been thoroughly decontaminated or that had been accumulated due to the re-release of radioactive cesium by trees after decontaminated activity.</p>","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142626258","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Assessment of photon and proton-induced activation in particles accelerators. 评估粒子加速器中的光子和质子诱导活化。
IF 0.8 4区 环境科学与生态学
Radiation protection dosimetry Pub Date : 2024-11-13 DOI: 10.1093/rpd/ncae146
Abdel-Mjid Nourreddine, Jonathan Collin, Nicolas Arbor, François Begin, Massimo Barbagallo, Federico Carminati, Giuliana Galli Carminati, Jean-Michel Horodynski
{"title":"Assessment of photon and proton-induced activation in particles accelerators.","authors":"Abdel-Mjid Nourreddine, Jonathan Collin, Nicolas Arbor, François Begin, Massimo Barbagallo, Federico Carminati, Giuliana Galli Carminati, Jean-Michel Horodynski","doi":"10.1093/rpd/ncae146","DOIUrl":"https://doi.org/10.1093/rpd/ncae146","url":null,"abstract":"<p><p>Nuclear activation affects all operating, future, or dismantled particle accelerators used in various fields, from medical applications to industrial applications. This work is concerned with the study of the radioactivity induced in various materials (Sc, Cu, Tb, Ta, W, Au) irradiated by hard Bremsstrahlung photons from an electron beam and by secondary neutrons induced by a proton beam. In both cases, the primary beam features an 18 MeV kinetic energy. We have performed Monte Carlo simulations with MCNP, GEANT4, FLUKA, and PHITS, coupled with the analytical codes CINDER'90 or FISPACT-II, to estimate the threshold reaction rates and the induced radioactivity in the samples. We compared the simulations with experimental activation measurements performed by high-resolution gamma spectrometry at a decommissioned medical LINAC and around the CYRCé cyclotron. We also used CR-39 solid-state nuclear track detectors to characterize the thermal and fast neutron components of the secondary fields.</p>","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142626322","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Countermeasures and follow-up actions in response to information on thyroid cancer, which possibly provoked misunderstanding and unfounded rumour, issued by five former Japanese prime ministers. 针对日本五位前首相发布的可能引发误解和无端谣言的甲状腺癌信息采取的对策和后续行动。
IF 0.8 4区 环境科学与生态学
Radiation protection dosimetry Pub Date : 2024-11-13 DOI: 10.1093/rpd/ncae065
Isamu Amir, Naomi Ito, Masaharu Tsubokura
{"title":"Countermeasures and follow-up actions in response to information on thyroid cancer, which possibly provoked misunderstanding and unfounded rumour, issued by five former Japanese prime ministers.","authors":"Isamu Amir, Naomi Ito, Masaharu Tsubokura","doi":"10.1093/rpd/ncae065","DOIUrl":"10.1093/rpd/ncae065","url":null,"abstract":"<p><p>This study summarises the responses to information on thyroid cancer, which possibly provoked misunderstanding and unfounded rumour, described in a letter issued by five former Japanese Prime Ministers on 27 January, 2022. Fukushima Medical University (FMU) implemented countermeasures and follow-up in three phases in response to the letter. In Phase 1, FMU shared scientific facts on the relationship between radiation exposure and thyroid cancer, as well as the response of FMU towards those who read the letter and were concerned about the description. Furthermore, FMU organised lectures and workshops to facilitate peer support among medical and non-medical staff, which were publicised through a newspaper article. In Phase 2, the peer support programme targeting patients with thyroid cancer was launched. In Phase 3, FMU participated in a TV programme to explain the medical aspects of thyroid cancer and the importance of providing peer support to patients with cancer, featuring individuals with experiences as medical staff and survivors.</p>","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11561570/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142626530","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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