Radiochimica Acta Radiochimica Acta最新文献_第2页

X-ray absorption spectroscopic study of trivalent and tetravalent actinides in solution at varying pH values 不同pH值溶液中三价和四价锕系元素的x射线吸收光谱研究

Radiochimica Acta Radiochimica Acta Pub Date : 2009-12-01 DOI: 10.1524/RACT.2009.1674

B. Brendebach, N. Banik, C. Marquardt, J. Rothe, M. Denecke, H. Geckeis

引用次数: 51

Evaluation of trace elements in chewing tobacco and snuff using instrumental neutron activation analysis (INAA) and atomic absorption spectroscopy (AAS) 中子活化分析和原子吸收光谱法评价嚼烟和鼻烟中微量元素

Radiochimica Acta Radiochimica Acta Pub Date : 2009-12-01 DOI: 10.1524/RACT.2009.1672

S. Waheed, N. Siddique, S. Rahman

引用次数: 1

Novel polymer vectors of 64Cu 新型64Cu聚合物载体

Radiochimica Acta Radiochimica Acta Pub Date : 2009-12-01 DOI: 10.1524/RACT.2009.1669

J. Kozempel, M. Hrubý, M. Nováková, J. Kučka, L. Lešetický, O. Lebeda

引用次数: 2

Kinetic and thermodynamic studies on the adsorption of U(VI) ions on densely crosslinked poly(methacrylic acid) from aqueous solutions 密交联聚甲基丙烯酸吸附U(VI)离子的动力学和热力学研究

Radiochimica Acta Radiochimica Acta Pub Date : 2009-12-01 DOI: 10.1524/RACT.2009.1668

C. Özeroğlu, G. Keçeli

{"title":"Kinetic and thermodynamic studies on the adsorption of U(VI) ions on densely crosslinked poly(methacrylic acid) from aqueous solutions","authors":"C. Özeroğlu, G. Keçeli","doi":"10.1524/RACT.2009.1668","DOIUrl":"https://doi.org/10.1524/RACT.2009.1668","url":null,"abstract":"Abstract In this study, densely crosslinked poly(methacrylic acid) was used to adsorb uranium(VI) ions from aqueous solution. For this purpose, the crosslinked copolymer of ethylene glycol dimethacrylate (EGDM) and methacrylic acid (MA) containing 25% (w/w) methacrylic acid (MA) was synthesized by using dibenzoyl peroxide-N,N-dimethylaniline (BPO-DMA) initiator system at room temperature. The adsorption of uranium(VI) ions on the copolymer sample (0.02 g copolymer/5 mL solution of U(VI) ions) was carried out in a batch reactor. The parameters which effect the uranium adsorption process, such as, contact time, pH of solution, initial uranium(VI) concentration and temperature were investigated. It was observed that an increase in these parameters enhanced the removal of U(VI) ions from aqueous solution. The adsorption data were modelled by the Freundlich, Langmuir and Dubinin–Radushkevich (D–R) isotherms. The adsorption capacity of the crosslinked copolymer and free energy change were calculated by using D–R isotherms. Thermodynamic parameters (ΔH°, ΔS° and ΔG°) were determined for the adsorption of U(VI) ions from aqueous solutions by the crosslinked copolymer bearing methacrylic acid functional groups. Experimental adsorption data were analyzed using sorption kinetic models of the pseudo-first order and pseudo-second order kinetic models. It was observed that pseudo-second order kinetic model provided a high goodness of fit with experimental data for the adsorption of U(VI) ions on the crosslinked copolymer bearing methacrylic acid functional groups. The densely crosslinked poly(methacrylic acid) might be of interest in large scale uranium removals from aqueous solution, since it had high uranyl sorption capacities ranging from 0.16 mmol/g to 2.37 mmol/g copolymer at pH 2.7 (293 K).","PeriodicalId":21029,"journal":{"name":"Radiochimica Acta Radiochimica Acta","volume":"11 1","pages":"709 - 717"},"PeriodicalIF":0.0,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85546813","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: 18

An adapted purification procedure to improve the quality of 90Y for clinical use 一种改进的纯化程序，以提高临床使用90Y的质量

Radiochimica Acta Radiochimica Acta Pub Date : 2009-12-01 DOI: 10.1524/RACT.2009.1666

Abmel Xiques Castillo, Keila Isaac Olivé, Edgar Casanova González, Denis Beckford, R. Leyva Montaña, A. Montero Álvarez, Eunice Olivé Álvarez

{"title":"An adapted purification procedure to improve the quality of 90Y for clinical use","authors":"Abmel Xiques Castillo, Keila Isaac Olivé, Edgar Casanova González, Denis Beckford, R. Leyva Montaña, A. Montero Álvarez, Eunice Olivé Álvarez","doi":"10.1524/RACT.2009.1666","DOIUrl":"https://doi.org/10.1524/RACT.2009.1666","url":null,"abstract":"Abstract There is an increasing interest for 90Y for radionuclide therapy. However, radioimmunotherapy, one of the most important applications for 90Y, demands a very high purity product. Obtaining a high quality 90Y is difficult not only because of the complex and time consuming production schemes but also because of the quality control which has challenging tasks like the determination of 90Sr at very low concentrations. The present paper investigates a reported purification procedure for the removal of stable metal trace contaminants from an 90Y solution, seeking for its potential use in the elimination of the radioactive contaminant 90Sr and its fast determination. For this purpose a washing step with HNO3 acid is introduced to elute 90Sr, the order of each acid solution is rearranged to reduce the potential contaminants present in acids and the size of the column is reduced to further optimize the procedure. As a result, an improved purification method is obtained, which allows the removal of both trace metal contaminants and 90Sr from an 90Y solution and the measurement of 90Sr/90Y ratios of the order of 10-7, which are well below the established pharmacopeia limit of 2×10-5.","PeriodicalId":21029,"journal":{"name":"Radiochimica Acta Radiochimica Acta","volume":"225 1","pages":"739 - 746"},"PeriodicalIF":0.0,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77147134","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: 12

Production and separation of no-carrier-added 93,94,95Tc from 9Be activated yttrium target 9Be活化钇靶中无载体添加93,94,95tc的制备与分离

Radiochimica Acta Radiochimica Acta Pub Date : 2009-12-01 DOI: 10.1524/RACT.2009.1667

M. Maiti, S. Lahiri

引用次数: 6

Radiosynthesis of a novel potential adenosine A3 receptor ligand, 5-ethyl 2,4-diethyl-3-((2-[18F]fluoroethyl)sulfanylcarbonyl)-6-phenylpyridine-5-carboxylate ([18F]FE@SUPPY:2) 新型潜在腺苷A3受体配体5-乙基2,4-二乙基-3-((2-[18F]氟乙基)磺酰基羰基)-6-苯基吡啶-5-羧酸盐([18F]FE@SUPPY:2)的放射性合成

Radiochimica Acta Radiochimica Acta Pub Date : 2009-12-01 DOI: 10.1524/RACT.2009.1663

D. Haeusler, M. Mitterhauser, L. Mien, K. Shanab, R. Lanzenberger, E. Schirmer, J. Ungersboeck, L. Nics, H. Spreitzer, H. Viernstein, R. Dudczak, et al.

{"title":"Radiosynthesis of a novel potential adenosine A3 receptor ligand, 5-ethyl 2,4-diethyl-3-((2-[18F]fluoroethyl)sulfanylcarbonyl)-6-phenylpyridine-5-carboxylate ([18F]FE@SUPPY:2)","authors":"D. Haeusler, M. Mitterhauser, L. Mien, K. Shanab, R. Lanzenberger, E. Schirmer, J. Ungersboeck, L. Nics, H. Spreitzer, H. Viernstein, R. Dudczak, et al.","doi":"10.1524/RACT.2009.1663","DOIUrl":"https://doi.org/10.1524/RACT.2009.1663","url":null,"abstract":"Abstract Since, to date very limited information on the distribution and function of the adenosine A3 receptor is available, the development of suitable radioligands is needed. Recently, we introduced [ 18F]FE@SUPPY (5-(2-[ 18F]fluoroethyl) 2,4-diethyl-3-(ethylsulfanylcarbonyl)-6-phenylpyridine-5-carboxylate) as the first PET-ligand for the A3R. Regarding the metabolic profile – this class of dialkylpyridines comprises two ester functions within one molecule, one carboxylic and one thiocarboxylic – one could expect carboxylesterases significantly contributing to cleavage and degradation. Therefore, our aim was the development of [ 18F]FE@SUPPY:2 (5-ethyl 2,4-diethyl-3-((2-[ 18F]fluoroethyl)sulfanylcarbonyl)-6-phenylpyridine-5-carboxylate), the functional isomer containing the label at the thiocarboxylic moiety. For satisfactory yields in high scale radiosyntheses, a reaction temperature of 75 °C has to be applied for at least 20 min using 20 mg/mL of precursor. So far, 6 complete high-scale radiosyntheses were performed. Starting from an average of 51.2±21.8 GBq (mean±SD) [ 18F]fluoride, 5.8±4.1 GBq of formulated [ 18F]FE@SUPPY:2 (12.0±5.4%, based on [ 18F]fluoride, not corrected for decay) were prepared in 75±8 min.","PeriodicalId":21029,"journal":{"name":"Radiochimica Acta Radiochimica Acta","volume":"32 1","pages":"753 - 758"},"PeriodicalIF":0.0,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86721684","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: 5

Determination of solubility parameters of cobalt(II) and indium(III) oxinates by tracer technique 示踪法测定氧化钴(II)和氧化铟(III)的溶解度参数

Radiochimica Acta Radiochimica Acta Pub Date : 2009-12-01 DOI: 10.1524/RACT.2009.1665

M. Mandal, R. Sarkar (Sain), S. Basu

引用次数: 0

Separation of 109Cd from silver targets by nanohematite 纳米赤铁矿从银靶中分离109Cd

Radiochimica Acta Radiochimica Acta Pub Date : 2009-12-01 DOI: 10.1524/RACT.2009.1664

M. Sadeghi, H. Karami, P. Sarabandi, M. Mirzaee

引用次数: 7

Charged particle induced reaction cross section data for production of the emerging medically important positron emitter 64Cu: A comprehensive evaluation 新型医学上重要的正电子发射器64Cu的带电粒子诱导反应截面数据的综合评价

Radiochimica Acta Radiochimica Acta Pub Date : 2009-12-01 DOI: 10.1524/RACT.2009.1670

M. Aslam, S. Sudár, M. Hussain, A. A. Malik, H. Shah, S. Qaim

{"title":"Charged particle induced reaction cross section data for production of the emerging medically important positron emitter 64Cu: A comprehensive evaluation","authors":"M. Aslam, S. Sudár, M. Hussain, A. A. Malik, H. Shah, S. Qaim","doi":"10.1524/RACT.2009.1670","DOIUrl":"https://doi.org/10.1524/RACT.2009.1670","url":null,"abstract":"Abstract The radionuclide 64Cu (T1/2=12.7 h) is an important non-standard positron emitter, suitable for combining PET imaging and targeted therapy. Its production in no-carrier-added form is done via charged particle induced reactions, and considerable amount of cross section data are available in the literature. We evaluated seven reactions, namely 64Ni(p, n) 64Cu, 64Ni(d, 2n) 64Cu, 68Zn(p, αn) 64Cu, 66Zn(p, 2n) 64Cu, 64Zn(d, 2p) 64Cu, 66Zn(p, α) 64Cu and natZn(d, x) 64Cu. Data analysis was generally limited up to about 25 MeV and the consistency check of experimental data was carried out using the nuclear model codes STAPRE, EMPIRE and TALYS. In a few cases experimental data were available up to 100 MeV; the consistency check in the high energy region was done only using the code TALYS. A statistical procedure (supported by nuclear model calculations) was then used to fit the data. The derived recommended sets of data, together with 95% confidence limits, are reported. The integral yields calculated from those data are also given. A critical comparison of the various production routes of 64Cu is presented. The 64Ni(p, n) 64Cu reaction, utilizing a highly enriched target, is the method of choice.","PeriodicalId":21029,"journal":{"name":"Radiochimica Acta Radiochimica Acta","volume":"93 1","pages":"669 - 686"},"PeriodicalIF":0.0,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82397766","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: 42