International Journal of PIXE最新文献_第2页

Specific activity and vermiculite content of soils of various particle sizes contaminated by the Fukushima Daiichi nuclear power plant accident 受福岛第一核电站事故污染的不同粒径土壤的比活性和蛭石含量

International Journal of PIXE Pub Date : 2022-08-22 DOI: 10.1142/s0129083520500047

K. Ishii, H. Arai

{"title":"Specific activity and vermiculite content of soils of various particle sizes contaminated by the Fukushima Daiichi nuclear power plant accident","authors":"K. Ishii, H. Arai","doi":"10.1142/s0129083520500047","DOIUrl":"https://doi.org/10.1142/s0129083520500047","url":null,"abstract":"Soil polluted by the Fukushima Daiichi nuclear power plant accident was collected and reduced in volume. We explored whether clay particles adsorbed radioactive cesium. Soil was sampled in a highly contaminated zone 16 km northwest of the power plant; soil particles 0.15–200 [Formula: see text]m in diameter were obtained by sieving and centrifugation, and specific activity was analyzed using a high-powered Ge detector. Vermiculite contents were quantified by X-ray diffraction. For soil particles[Formula: see text]m in diameter, the specific activity was constant, at about 381 kBq/kg, which is close to the 350 kBq/kg reported previously. For particles 10–200 [Formula: see text]m in diameter, the specific activity decreased by approximately the square root of the surface/entire volume ratio. The vermiculite content was identical for all soil particles [Formula: see text]2.5 [Formula: see text]m in diameter, but decreased in particles 2.5–200 [Formula: see text]m in diameter. Thus, the specific activity and vermiculite content were approximately proportionate. Vermiculite adhered to soil particles [Formula: see text]10 [Formula: see text]m in diameter, and radioactive cesium was uniformly distributed within the vermiculite.","PeriodicalId":14345,"journal":{"name":"International Journal of PIXE","volume":"13 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73703122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mercury concentration in hair collected from women in artisanal small-scale gold mining areas in Camarines Norte, Philippines 在菲律宾北部Camarines的手工小规模金矿地区收集的妇女头发中的汞浓度

International Journal of PIXE Pub Date : 2022-08-13 DOI: 10.1142/s0129083520500023

Harune Shibata, C. Takenaka, S. Murao, K. Sera

{"title":"Mercury concentration in hair collected from women in artisanal small-scale gold mining areas in Camarines Norte, Philippines","authors":"Harune Shibata, C. Takenaka, S. Murao, K. Sera","doi":"10.1142/s0129083520500023","DOIUrl":"https://doi.org/10.1142/s0129083520500023","url":null,"abstract":"After the conclusion of the Minamata Convention on Mercury, the use of mercury (Hg) has been prohibited worldwide, except in some developing countries. The Republic of the Philippines is one of the 128 signatories of the Convention. There are many artisanal and small-scale gold mining (ASGM) operations in the Philippines that still use Hg to amalgamate gold. In order to know the direct effect of exposure to Hg on women’s hair, we performed the proton-induced X-ray emission analysis of Hg concentrations in the hair samples collected from women at risk of Hg contamination, in both ASGM and non-ASGM areas in Camarines Norte, Philippines. At the same time of the hair sampling, we also conducted interviews with the women about their lives. From the analysis results, we found that the range of Hg concentrations in the hair samples was at a safe level, with no significant difference between the ASGM and non-ASGM areas. An analysis of the effect of diet on Hg concentrations in the hair samples showed a tendency toward higher Hg concentrations in women who ate more fish. Our results through hair analysis did not show a direct effect of exposure to atmospheric Hg, but further survey of local people should be necessary to reduce the risk of Hg contamination in women even after the use of Hg in ASGM eventually comes to an end.","PeriodicalId":14345,"journal":{"name":"International Journal of PIXE","volume":"76 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75879894","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A trial application of particle-induced X-ray emission analysis to microplastic samples collected from the seashore 颗粒诱导x射线发射分析在海滨微塑料样品中的试验应用

International Journal of PIXE Pub Date : 2022-08-11 DOI: 10.1142/s0129083520500035

R. Shimizu, H. Hinata, T. Mori, T. Asakawa, M. Satoh, M. Nogami, K. Hitomi, K. Ishii

引用次数: 0

Elemental composition of particles emitted from aircraft: High-sensitivity elemental analysis by using micro-PIXE 飞机发射粒子的元素组成:用微pixe进行高灵敏度元素分析

International Journal of PIXE Pub Date : 2022-08-11 DOI: 10.1142/s0129083520500011

K. Saitoh, S. Matsuyama, Yuta Takai, M. Miwa, S. Toyama, Y. Kikuchi, K. Nakazawa, O. Nagafuchi

{"title":"Elemental composition of particles emitted from aircraft: High-sensitivity elemental analysis by using micro-PIXE","authors":"K. Saitoh, S. Matsuyama, Yuta Takai, M. Miwa, S. Toyama, Y. Kikuchi, K. Nakazawa, O. Nagafuchi","doi":"10.1142/s0129083520500011","DOIUrl":"https://doi.org/10.1142/s0129083520500011","url":null,"abstract":"To achieve the elemental characterization of particles emitted from the aircraft, we performed elemental analysis using micro-PIXE for those emitted from carbon disc brakes and tires in addition to the turbine blade particles and engine reverser particles of the exhaust produced by jet engines, and identified the characteristics of individual particles from the elemental maps. As for the elemental characteristics of aircraft source particles, the turbine blade particles contained 16 elements (Na, Mg, Al, Si, S, K, Ca, Se, Ti, Cr, Mn, Fe, Co, Ni, Cu and W), and were considered to be those of the same origin. In the case of the engine reverser particles, in addition to turbine blade particles and turbine blade wear particles (nickel alloy), atmospheric particles were found. As one hypothesis, particles containing Ti–V, Mn–W and Cu–Zn may have got altered or aggregated in the process of particles moving from the turbine blade to the engine reverser. Clumps of particles were exhibited only in the elemental maps of tire particles. These clumps of particles were shaped like they had been scraped away, and were believed to have been caused by friction between the tire and the runway. These results aid in determining the component features of particles emitted from an aircraft.","PeriodicalId":14345,"journal":{"name":"International Journal of PIXE","volume":"41 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85797047","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Proton-induced X-ray emission analysis of the Chinese yam 山药质子诱导x射线发射分析

International Journal of PIXE Pub Date : 2020-12-01 DOI: 10.1142/s0129083520500096

M. Nogami, K. Hitomi, K. Ishii

引用次数: 0

Proton-induced X-ray emission analysis of white birch milk 白桦乳汁的质子诱导x射线发射分析

International Journal of PIXE Pub Date : 2020-12-01 DOI: 10.1142/s0129083520500102

E. Ohkoshi, S. Horimatsu, T. Tada, K. Hitomi, M. Nogami, K. Ishii

引用次数: 0

PIXE analysis of concrete composition in a research reactor facility under decommissioning 退役研究堆设施混凝土成分的PIXE分析

International Journal of PIXE Pub Date : 2020-10-23 DOI: 10.1142/s012908351850016x

N. Hagura, K. Kashimata, K. Mochiki, Y. Oguri

引用次数: 1

Treatment of primary and metastatic tumors through cancer immunotherapy and abscopal effect by targeted antigen-capturing nanoparticles with programmed death-1 blockade 通过癌症免疫治疗和靶向抗原捕获纳米颗粒与程序性死亡-1阻断的体外效应治疗原发性和转移性肿瘤

International Journal of PIXE Pub Date : 2020-10-23 DOI: 10.1142/s0129083518500158

S. Harada, T. Segawa, S. Ehara, Takahiro Sato

引用次数: 0

Sex-specific differences in elemental movement from blood to hair 从血液到头发的基本运动的性别差异

International Journal of PIXE Pub Date : 2020-10-23 DOI: 10.1142/s0129083518500201

K. Sera, S. Goto, T. Hosokawa, Y. Saitoh, R. Kumagai, K. Yamazaki, K. Yamaya

{"title":"Sex-specific differences in elemental movement from blood to hair","authors":"K. Sera, S. Goto, T. Hosokawa, Y. Saitoh, R. Kumagai, K. Yamazaki, K. Yamaya","doi":"10.1142/s0129083518500201","DOIUrl":"https://doi.org/10.1142/s0129083518500201","url":null,"abstract":"We investigated the relationships between the element concentrations in blood and hair to clarify the sex-specific differences in elemental movement from blood to hair, as we confirmed the presence of large sex-specific differences in the concentrations of certain elements in hair in our previous study. First, we compared the elemental concentrations in serum/plasma taken from healthy people (n = 148 females, 142 males) and found that there were significant differences (up to 20%) between females and males in levels of phosphorus, sulfur, calcium, bromine, and lead. We then examined the sex-specific differences in the elemental transfer factors from blood to hair by analyzing plasma and hair samples that had been simultaneously collected from the same people (20 females, 21 males). Calcium and selenium showed significant differences in transfer factors from plasma to hair. Particularly large sex-specific differences in the calcium concentration were explained by the difference in the transfer factors from blood to hair. We also examined the sex-specific differences among teenaged subjects alone (n = 47 females, 9 males; average age was approximately 17 years old) and noted no significant difference in the transfer factors between sexes. Taken together, these findings indicate that the transfer factors themselves are influenced by the excretion of sex hormones. NMCC ANNUAL REPORT 23 (2016)","PeriodicalId":14345,"journal":{"name":"International Journal of PIXE","volume":"10 1","pages":"1850020"},"PeriodicalIF":0.0,"publicationDate":"2020-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75568490","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Spatial distributions of cesium and strontium in tea [Camellia sinensis (L.) Kuntze] leaves evaluated by micro-PIXE analysis 茶中铯、锶的空间分布[j]用微pixe分析评价Kuntze]叶片

International Journal of PIXE Pub Date : 2020-06-01 DOI: 10.1142/s0129083520500059

A. Terakawa, K. Momokita, Y. Hattori, M. Sato, K. Ishii, M. Koka, N. Yamada, R. Yamagata, Y. Ishii, N. Suzui, T. Satoh, N. Kawachi

引用次数: 0