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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":"200 16-18","pages":"1777-1781"},"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":"200 16-18","pages":"1641-1646"},"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":"200 16-18","pages":"1542-1546"},"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":"200 16-18","pages":"1656-1659"},"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
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":"200 16-18","pages":"1835-1839"},"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":"200 16-18","pages":"1507-1513"},"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
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":"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":"200 16-18","pages":"1818-1823"},"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
Involvement of cellular senescence in the effect of X-irradiated human lung fibroblast WI-38 cells on human lung cancer A549 cell clonogenic potential. 细胞衰老参与了经 X 射线照射的人肺成纤维细胞 WI-38 对人肺癌 A549 细胞克隆生成潜能的影响。
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/ncae089
Hironori Yoshino, Katsuki Tadano, Chinatsu Omiya, Kae Ishii, Nanami Munakata
{"title":"Involvement of cellular senescence in the effect of X-irradiated human lung fibroblast WI-38 cells on human lung cancer A549 cell clonogenic potential.","authors":"Hironori Yoshino, Katsuki Tadano, Chinatsu Omiya, Kae Ishii, Nanami Munakata","doi":"10.1093/rpd/ncae089","DOIUrl":"https://doi.org/10.1093/rpd/ncae089","url":null,"abstract":"<p><p>Ionizing radiation not only affects irradiated but also non-irradiated surrounding cells through intercellular communication, indicating that the former cells could affect the latter. The present study investigated the effect of X-irradiated normal human lung fibroblast WI-38 cells on the clonofenic potential of human lung cancer A549 cells by co-culturing them. Moreover, the relationship between the effects of co-culturing on the clonogenic potential of A549 cells and cellular senescence in WI-38 cells was investigated. The co-culture with 10-Gy-irradiated WI-38 cells and A549 cells enhanced the clonogenic potential of non- or X-irradiated A549 cells. Irradiated WI-38 cells exhibited high SA-β-gal activity, a cellular senescence hallmark. Importantly, treatment with senolytic drugs, which eliminate senescent cells, not only influenced high-SA-β-gal-activity cell percentages among the irradiated WI-38 cells but also the effect of irradiated WI-38 cells on the clonogenic potential of A549 cells. In conclusion, our results suggest that irradiated WI-38 cells promote A549 cell clonogenic potential and irradiated senescent WI-38 cells contribute to this effect.</p>","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":"200 16-18","pages":"1608-1614"},"PeriodicalIF":0.8,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142626783","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
Mitochondrial reactive oxygen species-mediated fibroblast activation has a role in tumor microenvironment formation in radiation carcinogenesis. 线粒体活性氧介导的成纤维细胞活化在辐射致癌的肿瘤微环境形成中发挥作用。
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/ncae027
Tsutomu Shimura, Akira Ushiyama
{"title":"Mitochondrial reactive oxygen species-mediated fibroblast activation has a role in tumor microenvironment formation in radiation carcinogenesis.","authors":"Tsutomu Shimura, Akira Ushiyama","doi":"10.1093/rpd/ncae027","DOIUrl":"https://doi.org/10.1093/rpd/ncae027","url":null,"abstract":"<p><p>Cancer risks attributable to low-dose and low-dose-rate radiation are a serious concern for public health. Radiation risk assessment is based on lifespan studies among Hiroshima-Nagasaki A-bomb survivors; however, there are statistical limitations due to a small sample size for low-dose radiation. Therefore, basic biological studies are helpful in understanding the mechanism of radiation carcinogenesis. The detrimental effects of ionising radiation (IR) are caused by reactive oxygen species (ROS)-mediated oxidative DNA damage. IR-induced delayed ROS are produced in the electron transport chain reaction of the mitochondrial complex. Thus, mitochondria are a source of ROS and a primary target for ROS attacks. Consequently, mitochondrial dysfunction is thought to be a key event in the metabolic changes of cancer cells and is important in radiation-induced carcinogenesis. In this paper, we present recent findings on radiation carcinogenesis effect assessment, focusing on mitochondrial function as stress sensors.</p>","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":"200 16-18","pages":"1590-1593"},"PeriodicalIF":0.8,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142626835","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
Preliminary results of spatial distribution of radon and thoron with associated parameters in soil around active faults in Japan. 日本活动断层周围土壤中氡和钍的空间分布及相关参数的初步结果。
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/ncae117
Miroslaw Janik, Christopher Gomez, Satoshi Kodaira, Md Mahamudul Hasan
{"title":"Preliminary results of spatial distribution of radon and thoron with associated parameters in soil around active faults in Japan.","authors":"Miroslaw Janik, Christopher Gomez, Satoshi Kodaira, Md Mahamudul Hasan","doi":"10.1093/rpd/ncae117","DOIUrl":"https://doi.org/10.1093/rpd/ncae117","url":null,"abstract":"<p><p>The radon (Rn) and thoron (Tn) concentrations and other environmental parameters were measured in the vicinity of active faults in two regions with different geology structure of Japan. The range of measured values was from 1.2 to 74 kBq m$^{-3}$, 1.1 to 38.9 kBq m$^{-3}$, 0% to 4.35%, and 2$times $10$^{-13}$ to 4$times $10$^{-11}$ m$^{2}$, for Rn, Tn, CO$_{2}$, and soil permeability, respectively. Significant differences in the measured parameters were observed, suggesting that Rn concentrations near faults are strongly influenced by geological structure and fault type. Based on statistical analysis, good correlations were found between Rn, Tn, and CO$_{2}$ (carried gas ) concentrations. It is planned to continue the study with measurements at a number of additional sites.</p>","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":"200 16-18","pages":"1726-1731"},"PeriodicalIF":0.8,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142626900","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
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