This study determines uranium concentrations and isotopes (238U, 235U, and 234U) in baby food samples collected from Iraqi markets using solid-state nuclear track detector technical (CR-39). Also, some radiological hazard parameters such as annual committed effective dose (EU) and risk of an excess cancer fatality per million persons (RECFPMP) for the same study samples were calculated using theoretical equations. The samples in the present study were classified into three varieties: cereals and cereal products, vegetables and fruits, and biscuits. The results show that the average uranium concentration (mg/kg or ppm) values in cereals and cereal products, vegetables and fruits, and biscuits were 0.71 ± 0.01, 0.81 ± 0.04, and 0.72 ± 0.031, respectively. At the same time, the average values of 238U, 235U, and 234U in all samples of the present study were 9.08 ±0.17 Bq/kg, 0.42 ± 0.0081 Bq/kg, and 9.33 ± 0.18 Bq/kg, respectively. The total average of EU (mSv/y) due to all uranium isotopes (238U, 235U, and 234U) in cereals and cereal products, vegetables and fruits, and biscuits were 0.042 ± 0.0006, 0.039 ± 0.001, and 0.034 ± 0.001, respectively. Moreover, it was found that the average values of RECFPMP were 0.159 ± 0.002 in cereals and cereal products samples, 0.154 ± 0.007 in vegetables and fruits samples, and 0.130 ± 0.005 in biscuits samples. Uranium concentrations and the total annual committed effective dose in all baby food samples comply with the worldwide limits approved by UNSCEAR, which state safe limitations (1.7 mg/kg) and (0.32 mSv/y), respectively. So, one may conclude that there is no danger of uranium concentrations in the case of baby consumption.
{"title":"Uranium concentrations and its isotopes in baby food of Iraq","authors":"Farqad Abbas Taher, Ali Abid Abojassim","doi":"10.1515/ract-2023-0267","DOIUrl":"https://doi.org/10.1515/ract-2023-0267","url":null,"abstract":"This study determines uranium concentrations and isotopes (<jats:sup>238</jats:sup>U, <jats:sup>235</jats:sup>U, and <jats:sup>234</jats:sup>U) in baby food samples collected from Iraqi markets using solid-state nuclear track detector technical (CR-39). Also, some radiological hazard parameters such as annual committed effective dose (<jats:italic>E</jats:italic> <jats:sub>U</jats:sub>) and risk of an excess cancer fatality per million persons (RECFPMP) for the same study samples were calculated using theoretical equations. The samples in the present study were classified into three varieties: cereals and cereal products, vegetables and fruits, and biscuits. The results show that the average uranium concentration (mg/kg or ppm) values in cereals and cereal products, vegetables and fruits, and biscuits were 0.71 ± 0.01, 0.81 ± 0.04, and 0.72 ± 0.031, respectively. At the same time, the average values of <jats:sup>238</jats:sup>U, <jats:sup>235</jats:sup>U, and <jats:sup>234</jats:sup>U in all samples of the present study were 9.08 ±0.17 Bq/kg, 0.42 ± 0.0081 Bq/kg, and 9.33 ± 0.18 Bq/kg, respectively. The total average of <jats:italic>E</jats:italic> <jats:sub>U</jats:sub> (mSv/y) due to all uranium isotopes (<jats:sup>238</jats:sup>U, <jats:sup>235</jats:sup>U, and <jats:sup>234</jats:sup>U) in cereals and cereal products, vegetables and fruits, and biscuits were 0.042 ± 0.0006, 0.039 ± 0.001, and 0.034 ± 0.001, respectively. Moreover, it was found that the average values of RECFPMP were 0.159 ± 0.002 in cereals and cereal products samples, 0.154 ± 0.007 in vegetables and fruits samples, and 0.130 ± 0.005 in biscuits samples. Uranium concentrations and the total annual committed effective dose in all baby food samples comply with the worldwide limits approved by UNSCEAR, which state safe limitations (1.7 mg/kg) and (0.32 mSv/y), respectively. So, one may conclude that there is no danger of uranium concentrations in the case of baby consumption.","PeriodicalId":21167,"journal":{"name":"Radiochimica Acta","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140564423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Arunasis Bhattacharyya, Prasanta K. Mohapatra, Willem Verboom
The complexation and separation behaviour of trivalent actinides and lanthanides with various multiple diglycolamide (DGA) group-containing ligands are compiled in the present review. The DGA arms are anchored on various scaffolds, viz., C- and N-pivot tripodal backbones, benzene-centred tripodal backbones, calix[4]arene, pillar[5]arene and azamacrocycle scaffolds. Dendrimers of different generations having DGA arms were also evaluated for the extraction and complexation studies of trivalent actinide and lanthanide ions. The extraction efficiency of the DGA units increases significantly when they are grouped together on a single backbone/scaffold. Furthermore, the selectivity was found to improve in many cases, particularly with respect to the UO22+ ion. This is very important for the development of suitable ligands for the extraction/separation of the actinide and lanthanide ions. Combined experimental, luminescence and DFT studies on the complexation of trivalent actinides and lanthanides with these DGA-based ligands are quite useful to understand their extraction and separation behaviour and this review article gives a critical analysis of the results available in the literature.
本综述汇编了三价锕系元素和镧系元素与多种含双乙酰胺（DGA）基团配体的络合和分离行为。DGA 臂锚定在不同的支架上，即 C 轴和 N 轴三足骨架、苯中心三足骨架、钙[4]炔、柱[5]炔和氮杂环支架。此外，还评估了具有 DGA 臂的各代树枝状聚合物对三价锕系元素和镧系元素离子的萃取和络合研究。当 DGA 单元组合在一个骨架/支架上时，其萃取效率显著提高。此外，在许多情况下，选择性也得到了提高，尤其是对 UO2 2+ 离子。这对于开发萃取/分离锕系元素和镧系元素离子的合适配体非常重要。关于三价锕系元素和镧系元素与这些基于 DGA 的配体的络合的综合实验、发光和 DFT 研究对于了解它们的萃取和分离行为非常有用，本综述文章对现有文献中的结果进行了批判性分析。
{"title":"Understanding the separation of trivalent lanthanides and actinides using multiple diglycolamide-containing ligands: a review","authors":"Arunasis Bhattacharyya, Prasanta K. Mohapatra, Willem Verboom","doi":"10.1515/ract-2023-0264","DOIUrl":"https://doi.org/10.1515/ract-2023-0264","url":null,"abstract":"The complexation and separation behaviour of trivalent actinides and lanthanides with various multiple diglycolamide (DGA) group-containing ligands are compiled in the present review. The DGA arms are anchored on various scaffolds, viz., C- and N-pivot tripodal backbones, benzene-centred tripodal backbones, calix[4]arene, pillar[5]arene and azamacrocycle scaffolds. Dendrimers of different generations having DGA arms were also evaluated for the extraction and complexation studies of trivalent actinide and lanthanide ions. The extraction efficiency of the DGA units increases significantly when they are grouped together on a single backbone/scaffold. Furthermore, the selectivity was found to improve in many cases, particularly with respect to the UO<jats:sub>2</jats:sub> <jats:sup>2+</jats:sup> ion. This is very important for the development of suitable ligands for the extraction/separation of the actinide and lanthanide ions. Combined experimental, luminescence and DFT studies on the complexation of trivalent actinides and lanthanides with these DGA-based ligands are quite useful to understand their extraction and separation behaviour and this review article gives a critical analysis of the results available in the literature.","PeriodicalId":21167,"journal":{"name":"Radiochimica Acta","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140564162","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Sonali Paresh Deogaonkar-Bhade, Rajesh Sankhla, Pramilla D. Sawant
A portable liquid scintillation counting system has been used as a rapid screening tool for radiological characterization and in situ measurements of aqueous samples. The methodology was standardized based on the Pulse Length Index for gross α and gross β activity determinations in aqueous solutions by means of a portable Liquid Scintillation Counter (LSC). This single compact PMT system yielded precise results for aqueous test samples, which were validated against a conventional HIDEX 300SL LSC system. The sensitivity of the portable LSC for gross measurements was investigated thoroughly for various combinations of scintillation cocktails and sample proportions, and found to be well below the Operational Intervention Levels (OILs) recommended by Atomic Energy Regulatory Board (AERB) during radiation emergency scenarios. Gross α- and β-activity measurements by means of the portable LSC system have shown this procedure to be effective for preliminary screening and evaluating the total radioactivity in aqueous samples during such radiation emergencies.
{"title":"Rapid screening technique for gross α and gross β estimations in aqueous samples during radiation emergency","authors":"Sonali Paresh Deogaonkar-Bhade, Rajesh Sankhla, Pramilla D. Sawant","doi":"10.1515/ract-2023-0213","DOIUrl":"https://doi.org/10.1515/ract-2023-0213","url":null,"abstract":"A portable liquid scintillation counting system has been used as a rapid screening tool for radiological characterization and <jats:italic>in situ</jats:italic> measurements of aqueous samples. The methodology was standardized based on the Pulse Length Index for gross <jats:italic>α</jats:italic> and gross <jats:italic>β</jats:italic> activity determinations in aqueous solutions by means of a portable Liquid Scintillation Counter (LSC). This single compact PMT system yielded precise results for aqueous test samples, which were validated against a conventional HIDEX 300SL LSC system. The sensitivity of the portable LSC for gross measurements was investigated thoroughly for various combinations of scintillation cocktails and sample proportions, and found to be well below the Operational Intervention Levels (OILs) recommended by Atomic Energy Regulatory Board (AERB) during radiation emergency scenarios. Gross <jats:italic>α</jats:italic>- and <jats:italic>β</jats:italic>-activity measurements by means of the portable LSC system have shown this procedure to be effective for preliminary screening and evaluating the total radioactivity in aqueous samples during such radiation emergencies.","PeriodicalId":21167,"journal":{"name":"Radiochimica Acta","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140564477","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Khalid Alsafi, Dalal Abdullah Aloraini, M. A. Saif, Kh. S. Shaaban
The demonstrations impact of CeO2 on the radiation shielding properties of SiO2–B2O3–BaO–Li2O glasses has been investigated. The observed trend in density ρ ranged from 3.127 to 4.022 g/cm³, whereas the molar volume Vm of these glasses decreased. The half-value layers (HVL), and mean free paths (MFP) of CL glasses reinforce the notion that the presence of Ce ions, particularly in CL2, enhances the ability of glasses’ to attenuate gamma rays. The effective electron density (Neff) increases with the addition of CeO2, suggesting a correlation between the enhancement of radiation shielding properties and the amount of CeO2 incorporated into the glasses.
研究了 CeO2 对 SiO2-B2O3-BaO-Li2O 玻璃辐射屏蔽性能的示范影响。观察到密度 ρ 的变化趋势在 3.127 至 4.022 g/cm³ 之间，而这些玻璃的摩尔体积 V m 则有所下降。CL玻璃的半值层（HVL）和平均自由路径（MFP）强化了这样一种观点，即铈离子的存在，尤其是在CL2中，增强了玻璃衰减伽马射线的能力。有效电子密度（N eff）随着二氧化 Ce 的加入而增加，这表明辐射屏蔽性能的增强与玻璃中二氧化 Ce 的加入量之间存在相关性。
{"title":"Gamma and neutron attenuation of SiO2–B2O3–BaO–Li2O glasses doped with CeO2","authors":"Khalid Alsafi, Dalal Abdullah Aloraini, M. A. Saif, Kh. S. Shaaban","doi":"10.1515/ract-2024-0272","DOIUrl":"https://doi.org/10.1515/ract-2024-0272","url":null,"abstract":"The demonstrations impact of CeO<jats:sub>2</jats:sub> on the radiation shielding properties of SiO<jats:sub>2</jats:sub>–B<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub>–BaO–Li<jats:sub>2</jats:sub>O glasses has been investigated. The observed trend in density <jats:italic>ρ</jats:italic> ranged from 3.127 to 4.022 g/cm³, whereas the molar volume <jats:italic>V</jats:italic> <jats:sub> <jats:italic>m</jats:italic> </jats:sub> of these glasses decreased. The half-value layers (HVL), and mean free paths (MFP) of CL glasses reinforce the notion that the presence of Ce ions, particularly in CL<jats:sub>2</jats:sub>, enhances the ability of glasses’ to attenuate gamma rays. The effective electron density (<jats:italic>N</jats:italic> <jats:sub>eff</jats:sub>) increases with the addition of CeO<jats:sub>2</jats:sub>, suggesting a correlation between the enhancement of radiation shielding properties and the amount of CeO<jats:sub>2</jats:sub> incorporated into the glasses.","PeriodicalId":21167,"journal":{"name":"Radiochimica Acta","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140564151","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The purpose of this research is to produce composites of epoxy resin and calcium carbonate (EP/CaCO3) and investigate how treating the CaCO3 filler with stearic acid and gamma radiation affects the properties of the epoxy composites, enhancing their suitability for a range of applications. The CaCO3 powder was subjected to stearic acid treatment and later exposed to γ-radiation at various doses namely (10, 20 and 30 kGy), Different weight percentages of untreated and treated CaCO3 powder were added to epoxy resin (EP) to create EP/CaCO3 composites loaded with varying amounts of CaCO3 filler (5 %, 10 %, 20 %, 30 %, and 40 %). The influence of both stearic acid treatment and different doses of gamma radiation on CaCO3 was investigated. The composites were subjected to characterization of various properties including mechanical (splitting tensile strength, impact strength), thermal (TGA and dimensional thermal analysis) as well as morphological SEM examination. The analysis’ findings demonstrated that the stearic acid monolayer functions as a coupling agent in the EP matrix and can coat CaCO3 particles efficiently. The modification of CaCO3 by stearic acid and exposure to 30 kGy of gamma radiation shows a notable improvement in thermal stability and mechanical qualities for the epoxy composites loaded with various CaCO3 concentrations.
{"title":"The effect of gamma rays and stearic acid on calcium carbonate and its impact on the properties of epoxy-based composites","authors":"Ali A. M. Yassene, Eman H. Awad, Ahmed A. Hegazy","doi":"10.1515/ract-2023-0266","DOIUrl":"https://doi.org/10.1515/ract-2023-0266","url":null,"abstract":"The purpose of this research is to produce composites of epoxy resin and calcium carbonate (EP/CaCO<jats:sub>3</jats:sub>) and investigate how treating the CaCO<jats:sub>3</jats:sub> filler with stearic acid and gamma radiation affects the properties of the epoxy composites, enhancing their suitability for a range of applications. The CaCO<jats:sub>3</jats:sub> powder was subjected to stearic acid treatment and later exposed to <jats:italic>γ</jats:italic>-radiation at various doses namely (10, 20 and 30 kGy), Different weight percentages of untreated and treated CaCO<jats:sub>3</jats:sub> powder were added to epoxy resin (EP) to create EP/CaCO<jats:sub>3</jats:sub> composites loaded with varying amounts of CaCO<jats:sub>3</jats:sub> filler (5 %, 10 %, 20 %, 30 %, and 40 %). The influence of both stearic acid treatment and different doses of gamma radiation on CaCO<jats:sub>3</jats:sub> was investigated. The composites were subjected to characterization of various properties including mechanical (splitting tensile strength, impact strength), thermal (TGA and dimensional thermal analysis) as well as morphological SEM examination. The analysis’ findings demonstrated that the stearic acid monolayer functions as a coupling agent in the EP matrix and can coat CaCO<jats:sub>3</jats:sub> particles efficiently. The modification of CaCO<jats:sub>3</jats:sub> by stearic acid and exposure to 30 kGy of gamma radiation shows a notable improvement in thermal stability and mechanical qualities for the epoxy composites loaded with various CaCO<jats:sub>3</jats:sub> concentrations.","PeriodicalId":21167,"journal":{"name":"Radiochimica Acta","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140564161","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yiwei Huang, Xinlong Chen, Yinglin Shen, Xiaomin Li, Xupeng Zhi, Peng Liu, Meiying Liu, Bin Liu
Selective removal of 99TcO₄− from radioactive wastewater is a challenging but significant task, which benefits spent fuel reprocessing and radioactive-waste leakage treatment. This work introduces the performance of adsorption ReO4− using a series of novel anion exchange resins, namely MAPE-1, MAPE-2, MAPE-3, and MAGD-1, impregnated with functionalized ionic liquids as active sites. They exhibit a high selectivity towards TcO₄−/ReO₄−, in a wide pH range of pH 5–11 for ReO₄−/TcO₄− adsorption. Among these resins, MAPE-1 has the best adsorption performance for ReO4−, with a maximum adsorption capacity of 202.4 mg/g and a high distribution ratio Kd of 6.2 × 10⁶ mL/g at pH 7. The adsorption mechanism involves anion exchange between functionalized ionic liquids and TcO₄−/ReO₄−, which is supported by X-ray energy dispersive spectroscopy (EDS) and Fourier Transform Infrared spectroscopy (FT-IR) analyses. In addition, X-ray photoelectron spectroscopy (XPS) further illustrates the interaction between the resin and perrhenate.
{"title":"Separation of ReO4 −/TcO4 − from simulated radioactive waste liquid by a novel series of anion exchange resins","authors":"Yiwei Huang, Xinlong Chen, Yinglin Shen, Xiaomin Li, Xupeng Zhi, Peng Liu, Meiying Liu, Bin Liu","doi":"10.1515/ract-2023-0261","DOIUrl":"https://doi.org/10.1515/ract-2023-0261","url":null,"abstract":"Selective removal of <jats:sup>99</jats:sup>TcO₄<jats:sup>−</jats:sup> from radioactive wastewater is a challenging but significant task, which benefits spent fuel reprocessing and radioactive-waste leakage treatment. This work introduces the performance of adsorption ReO<jats:sub>4</jats:sub> <jats:sup>−</jats:sup> using a series of novel anion exchange resins, namely MAPE-1, MAPE-2, MAPE-3, and MAGD-1, impregnated with functionalized ionic liquids as active sites. They exhibit a high selectivity towards TcO₄<jats:sup>−</jats:sup>/ReO₄<jats:sup>−</jats:sup>, in a wide pH range of pH 5–11 for ReO₄<jats:sup>−</jats:sup>/TcO₄<jats:sup>−</jats:sup> adsorption. Among these resins, MAPE-1 has the best adsorption performance for ReO<jats:sub>4</jats:sub> <jats:sup>−</jats:sup>, with a maximum adsorption capacity of 202.4 mg/g and a high distribution ratio <jats:italic>K</jats:italic> <jats:sub> <jats:italic>d</jats:italic> </jats:sub> of 6.2 × 10⁶ mL/g at pH 7. The adsorption mechanism involves anion exchange between functionalized ionic liquids and TcO₄<jats:sup>−</jats:sup>/ReO₄<jats:sup>−</jats:sup>, which is supported by X-ray energy dispersive spectroscopy (EDS) and Fourier Transform Infrared spectroscopy (FT-IR) analyses. In addition, X-ray photoelectron spectroscopy (XPS) further illustrates the interaction between the resin and perrhenate.","PeriodicalId":21167,"journal":{"name":"Radiochimica Acta","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140322448","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The main objective of this research is to assess how gamma radiation influences the chemical composition and activities such as antioxidant, antimicrobial and anticancer activities of Lepidium sativum (L. sativum) seeds. Methanolic extracts were obtained through a 24 h maceration process from L. sativum seeds exposed to various doses of gamma irradiation. Phytochemical screening involved precipitation and staining reactions, with the antioxidant potential assessed using the 2,2-diphenyl-1-picrylhydrazyl (DPPH) assay. Antimicrobial activity was evaluated through a diffusion test on agar medium, while the cytotoxic potential on the lung cancer line “A-549 cells” was examined using the 3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2H-tetrazolium bromide (MTT) assay. Qualitative analysis of the extracts identified preserved bioactive constituents after irradiation. Additionally, quantitative analysis indicated a significant rise in the total content of polyphenols and flavonoids under radiation, accompanied by an enhanced reducing power compared to the control. The antimicrobial and cytotoxic capabilities also improved, evident in increased growth inhibition zones for certain microbial strains and reduced viability rates of A549 cells. These results show promise and warrant further investigation into the potential of gamma radiation to enhance additional biological effects of plants.
{"title":"Impact of gamma irradiation on phytochemical composition, and biological activities of Lepidium sativum seeds extract","authors":"Samia Hadj Rabia, Aicha Debib, Atika Eddaikra, Lila Aberkane-Mchebbek, Ramy Nouri, Fatima Benmoussa, Amine Mokhtari, Sarah Medjber, Belkacem Mansouri, Mohammed Messaoudi","doi":"10.1515/ract-2023-0260","DOIUrl":"https://doi.org/10.1515/ract-2023-0260","url":null,"abstract":"The main objective of this research is to assess how gamma radiation influences the chemical composition and activities such as antioxidant, antimicrobial and anticancer activities of <jats:italic>Lepidium sativum</jats:italic> (<jats:italic>L. sativum</jats:italic>) seeds. Methanolic extracts were obtained through a 24 h maceration process from <jats:italic>L. sativum</jats:italic> seeds exposed to various doses of gamma irradiation. Phytochemical screening involved precipitation and staining reactions, with the antioxidant potential assessed using the 2,2-diphenyl-1-picrylhydrazyl (DPPH) assay. Antimicrobial activity was evaluated through a diffusion test on agar medium, while the cytotoxic potential on the lung cancer line “A-549 cells” was examined using the 3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2H-tetrazolium bromide (MTT) assay. Qualitative analysis of the extracts identified preserved bioactive constituents after irradiation. Additionally, quantitative analysis indicated a significant rise in the total content of polyphenols and flavonoids under radiation, accompanied by an enhanced reducing power compared to the control. The antimicrobial and cytotoxic capabilities also improved, evident in increased growth inhibition zones for certain microbial strains and reduced viability rates of A549 cells. These results show promise and warrant further investigation into the potential of gamma radiation to enhance additional biological effects of plants.","PeriodicalId":21167,"journal":{"name":"Radiochimica Acta","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140322553","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Boron isotopic ratio measurement is very important in the nuclear industry because it is used as neutron poison (in the form of boric acid or a B4C pellet) and control rod material (B4C pellet) in nuclear power plants. Since 10B has a higher neutron absorption cross-section, enriched 10B is used in the nuclear industry and the extent of enrichment varies from 50–90 %. Therefore, it is essential to determine the 10B/11B ratio in boric acid and B4C. The prime purpose of the present study is to utilize LA-ICPMS for evaluating 10B/11B ratio both in solution (boric acid) and solid (B4C pellet) without any pre-treatment so that the difficulty in dissolution or powdering process of B4C (one of the hardest materials) can be avoided and the B4C pellet can be reused. The results obtained from LA-ICPMS for the B4C pellet are discussed and compared with the solution ICPMS, TIMS, and LIMS. The solutions of boric acid (natural abundance) and dissolved B4C (natural & ∼67 % enriched isotopic composition) were analyzed by LA-ICPMS and validated by liquid sampling ICPMS data.
{"title":"Determination of 10B/11B in boric acid and B4C using LA-ICPMS","authors":"Maity Ujjwal Kumar, Namitha Janarthanam, Bavya Pulipaka, Ushalakshmi Kumar, Manoravi Periasamy, Vijayalakshmi Sreenivasan","doi":"10.1515/ract-2023-0207","DOIUrl":"https://doi.org/10.1515/ract-2023-0207","url":null,"abstract":"Boron isotopic ratio measurement is very important in the nuclear industry because it is used as neutron poison (in the form of boric acid or a B<jats:sub>4</jats:sub>C pellet) and control rod material (B<jats:sub>4</jats:sub>C pellet) in nuclear power plants. Since <jats:sup>10</jats:sup>B has a higher neutron absorption cross-section, enriched <jats:sup>10</jats:sup>B is used in the nuclear industry and the extent of enrichment varies from 50–90 %. Therefore, it is essential to determine the <jats:sup>10</jats:sup>B/<jats:sup>11</jats:sup>B ratio in boric acid and B<jats:sub>4</jats:sub>C. The prime purpose of the present study is to utilize LA-ICPMS for evaluating <jats:sup>10</jats:sup>B/<jats:sup>11</jats:sup>B ratio both in solution (boric acid) and solid (B<jats:sub>4</jats:sub>C pellet) without any pre-treatment so that the difficulty in dissolution or powdering process of B<jats:sub>4</jats:sub>C (one of the hardest materials) can be avoided and the B<jats:sub>4</jats:sub>C pellet can be reused. The results obtained from LA-ICPMS for the B<jats:sub>4</jats:sub>C pellet are discussed and compared with the solution ICPMS, TIMS, and LIMS. The solutions of boric acid (natural abundance) and dissolved B<jats:sub>4</jats:sub>C (natural & ∼67 % enriched isotopic composition) were analyzed by LA-ICPMS and validated by liquid sampling ICPMS data.","PeriodicalId":21167,"journal":{"name":"Radiochimica Acta","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140168317","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
With the rapid development of the atomic energy industry, the demand for nuclear fuel has risen, while the limited resources of uranium mines make it difficult to meet the needs of the future development of nuclear energy. Expanding sources of uranium acquisition is necessary, and the enrichment and recovery of precious uranium from uranium-containing wastewater is invaluable. By synthesizing alginate supported potassium manganese ferrocyanide nanocomposites with magnetic response (KMnFC/MA/Fe3O4), the high efficiency adsorption and separation of uranium in acidic uranium-containing wastewater can be realized conveniently and quickly. The magnetic composite was characterized by a variety of technical means, and the adsorption behavior of the magnetic material on uranium was studied by static adsorption experiments under different environmental conditions. The adsorption kinetics and isotherm of uranium by KMnFC/MA/Fe3O4 were studied by using some common linear adsorption models. The results show that the adsorption rate of KMnFC/MA/Fe3O4 on uranium is fast, and the adsorption equilibrium can be reached within 90 min. The adsorption process conforms to a pseudo-secondary kinetic model and is dominated by chemisorption. The adsorption of uranium by KMnFC/MA/Fe3O4 magnetic material is single molecular layer adsorption, and the maximum adsorption capacity is 425.5 mg g−1 at 35 °C. KMnFC/MA/Fe3O4 is a promising adsorbent in the field of acidic low-concentration uranium wastewater treatment because of its good effect on the treatment of low concentration uranium wastewater, the concentration of uranium in the wastewater reaches the emission standard after treatment and it is easy to be separated magnetically after adsorption.
{"title":"Magnetic alginate supported potassium manganese ferrocyanide for the recovery of uranium from acidic wastewater","authors":"Tingting Li, Fang Wang, Liangshu Xia","doi":"10.1515/ract-2023-0257","DOIUrl":"https://doi.org/10.1515/ract-2023-0257","url":null,"abstract":"With the rapid development of the atomic energy industry, the demand for nuclear fuel has risen, while the limited resources of uranium mines make it difficult to meet the needs of the future development of nuclear energy. Expanding sources of uranium acquisition is necessary, and the enrichment and recovery of precious uranium from uranium-containing wastewater is invaluable. By synthesizing alginate supported potassium manganese ferrocyanide nanocomposites with magnetic response (KMnFC/MA/Fe<jats:sub>3</jats:sub>O<jats:sub>4</jats:sub>), the high efficiency adsorption and separation of uranium in acidic uranium-containing wastewater can be realized conveniently and quickly. The magnetic composite was characterized by a variety of technical means, and the adsorption behavior of the magnetic material on uranium was studied by static adsorption experiments under different environmental conditions. The adsorption kinetics and isotherm of uranium by KMnFC/MA/Fe<jats:sub>3</jats:sub>O<jats:sub>4</jats:sub> were studied by using some common linear adsorption models. The results show that the adsorption rate of KMnFC/MA/Fe<jats:sub>3</jats:sub>O<jats:sub>4</jats:sub> on uranium is fast, and the adsorption equilibrium can be reached within 90 min. The adsorption process conforms to a pseudo-secondary kinetic model and is dominated by chemisorption. The adsorption of uranium by KMnFC/MA/Fe<jats:sub>3</jats:sub>O<jats:sub>4</jats:sub> magnetic material is single molecular layer adsorption, and the maximum adsorption capacity is 425.5 mg g<jats:sup>−1</jats:sup> at 35 °C. KMnFC/MA/Fe<jats:sub>3</jats:sub>O<jats:sub>4</jats:sub> is a promising adsorbent in the field of acidic low-concentration uranium wastewater treatment because of its good effect on the treatment of low concentration uranium wastewater, the concentration of uranium in the wastewater reaches the emission standard after treatment and it is easy to be separated magnetically after adsorption.","PeriodicalId":21167,"journal":{"name":"Radiochimica Acta","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140150340","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Xanthomicrol (4′,5-dihydroxy-6,7,8-trimethoxyflavone) is the main active component of Dracocephalum kotschyi Boiss leaf extract. It has showed selective cytotoxic activity against some cancer cell lines and little effect on human fetal foreskin fibroblast cells used as nonmalignant control. This study aimed to develop 99mTc-labeled xanthomicrol and to evaluate its efficiency as a new tumor imaging agent. l,l-Ethylene dicysteine (EC) chelator was conjugated to xanthomicrol. EC-Xanthomicrol was labeled with technetium-99m by using tin chloride as a reducing agent and incubating at room temperature. Radiochemical purity and in vitro stability were analyzed by thin layer chromatography and high-performance liquid chromatography. In vitro cellular uptake and binding profile of radio-conjugate was determined on C6 glioma cells. In vivo bioevaluation and imaging studies of [99mTc]Tc-EC-Xanthomicrol were performed in C6 glioma tumor induced rat at different time points after injection of radio-conjugate. The high radiochemical yield (>95 %) was achieved for [99mTc]Tc-EC-Xanthomicrol which was stable up to 6 h. The radio-conjugate indicated high cell uptake (35.12 % at 2 h) which demonstrated to be specific. Tumor uptake was seen for [99mTc]Tc-EC-Xanthomicrol (1.23 ± 0.14 %ID/g) at 1 h post injection. Scintigraphy confirmed that tumors could be visualized clearly with [99mTc]Tc-EC-Xanthomicrol. The results indicated that [99mTc]Tc-EC-Xanthomicrol has potential to be considered as a new radiotracer in glioma tumor imaging.
{"title":"Technetium-99m radiolabeling through conjugation with l,l-ethylene dicysteine chelator of a trimethoxylated flavone and its bioevaluation in rat with induced C6 glioma tumor as a new cancer diagnostic agent","authors":"Maryam Ghalbi Ahangari, Mahdi Moridi Farimani, Mostafa Erfani, Mostafa Goudarzi","doi":"10.1515/ract-2023-0239","DOIUrl":"https://doi.org/10.1515/ract-2023-0239","url":null,"abstract":"Xanthomicrol (4′,5-dihydroxy-6,7,8-trimethoxyflavone) is the main active component of <jats:italic>Dracocephalum kotschyi</jats:italic> Boiss leaf extract. It has showed selective cytotoxic activity against some cancer cell lines and little effect on human fetal foreskin fibroblast cells used as nonmalignant control. This study aimed to develop <jats:sup>99m</jats:sup>Tc-labeled xanthomicrol and to evaluate its efficiency as a new tumor imaging agent. <jats:sc>l</jats:sc>,<jats:sc>l</jats:sc>-Ethylene dicysteine (EC) chelator was conjugated to xanthomicrol. EC-Xanthomicrol was labeled with technetium-99m by using tin chloride as a reducing agent and incubating at room temperature. Radiochemical purity and <jats:italic>in vitro</jats:italic> stability were analyzed by thin layer chromatography and high-performance liquid chromatography. <jats:italic>In vitro</jats:italic> cellular uptake and binding profile of radio-conjugate was determined on C6 glioma cells. <jats:italic>In vivo</jats:italic> bioevaluation and imaging studies of [<jats:sup>99m</jats:sup>Tc]Tc-EC-Xanthomicrol were performed in C6 glioma tumor induced rat at different time points after injection of radio-conjugate. The high radiochemical yield (>95 %) was achieved for [<jats:sup>99m</jats:sup>Tc]Tc-EC-Xanthomicrol which was stable up to 6 h. The radio-conjugate indicated high cell uptake (35.12 % at 2 h) which demonstrated to be specific. Tumor uptake was seen for [<jats:sup>99m</jats:sup>Tc]Tc-EC-Xanthomicrol (1.23 ± 0.14 %ID/g) at 1 h post injection. Scintigraphy confirmed that tumors could be visualized clearly with [<jats:sup>99m</jats:sup>Tc]Tc-EC-Xanthomicrol. The results indicated that [<jats:sup>99m</jats:sup>Tc]Tc-EC-Xanthomicrol has potential to be considered as a new radiotracer in glioma tumor imaging.","PeriodicalId":21167,"journal":{"name":"Radiochimica Acta","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140150348","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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