99Tc has a long half-life, high fission yield, and good environmental mobility, posing a significant threat to the environment and human health. Therefore, removing technetium from radioactive wastewater is a very important and urgent task. For laboratory safety reasons, ReO4− is often used as a non-isotopic substitute for 99TcO4−. From this point of view, the study of the separation behavior of Re in the aqueous phase can provide a reference value for the removal of 99Tc. Here, a new type of extraction chromatography resin was prepared by impregnating the functionalized ionic liquid into the macroporous resin, whose imidazolium cations modified by amide functional groups which can effectively capture ReO4−/TcO4− from simulated radioactive wastewater. The results show the resin has good adsorption performance and fast adsorption kinetics (the adsorption equilibrium is about 20 min). The adsorption mechanism was investigated using Fourier transform infrared (FT-IR) spectra and X-ray photoelectron spectroscopy (XPS). It shows that the adsorption process is an anion exchange between Cl− in the resin and ReO4− in the solution.
{"title":"Study on separation of ReO4 −, a substitute for TcO4 −, using functional ionic liquid impregnated extraction chromatography resins","authors":"Meiying Liu, Xupeng Zhi, Peng Liu, Xiaomin Li, Xinlong Chen, Bin Liu, Yinglin Shen","doi":"10.1515/ract-2024-0290","DOIUrl":"https://doi.org/10.1515/ract-2024-0290","url":null,"abstract":"<jats:sup>99</jats:sup>Tc has a long half-life, high fission yield, and good environmental mobility, posing a significant threat to the environment and human health. Therefore, removing technetium from radioactive wastewater is a very important and urgent task. For laboratory safety reasons, ReO<jats:sub>4</jats:sub> <jats:sup>−</jats:sup> is often used as a non-isotopic substitute for <jats:sup>99</jats:sup>TcO<jats:sub>4</jats:sub> <jats:sup>−</jats:sup>. From this point of view, the study of the separation behavior of Re in the aqueous phase can provide a reference value for the removal of <jats:sup>99</jats:sup>Tc. Here, a new type of extraction chromatography resin was prepared by impregnating the functionalized ionic liquid into the macroporous resin, whose imidazolium cations modified by amide functional groups which can effectively capture ReO<jats:sub>4</jats:sub> <jats:sup>−</jats:sup>/TcO<jats:sub>4</jats:sub> <jats:sup>−</jats:sup> from simulated radioactive wastewater. The results show the resin has good adsorption performance and fast adsorption kinetics (the adsorption equilibrium is about 20 min). The adsorption mechanism was investigated using Fourier transform infrared (FT-IR) spectra and X-ray photoelectron spectroscopy (XPS). It shows that the adsorption process is an anion exchange between Cl<jats:sup>−</jats:sup> in the resin and ReO<jats:sub>4</jats:sub> <jats:sup>−</jats:sup> in the solution.","PeriodicalId":21167,"journal":{"name":"Radiochimica Acta","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142192182","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}
Wenbing Ding, Jie Lyu, Yuying Yu, Fuyuan Tan, Ai Yang, Tu Lan, Jiali Liao, Yuanyou Yang, Ning Liu, Feize Li
Multimodal imaging for precision medicine has received significant attention in recent years. In this work, we proposed to combine Cerenkov luminescence imaging (CLI) and SPECT-CT to systematically evaluate the real biodistribution of nanoscale metal-organic framework (MOF) in murine xenograft model. 177Lu was incorporated into nanoscale MOF-76(Eu)/FA in high radiochemical yield to construct a multimodal probe with physiological stability. Subsequently, the 177Lu-MOF-76(Eu)/FA shows adequate in vitro affinity and cytotoxicity to cancer cells. Furthermore, by comparing the SPECT imaging and CLI, we evaluated the feasibility of in vivo CLI application in preclinical studies of 177Lu-radiopharmaceuticals. The results demonstrate that CLI address some limitations of fluorescence imaging based on organic dye molecule and enable accurate tracking 177Lu radiolabeled compounds in major organs.
{"title":"In vivo evaluation of Cerenkov luminescence and SPECT imaging for nanoscale 177Lu-labeled metal-organic framework","authors":"Wenbing Ding, Jie Lyu, Yuying Yu, Fuyuan Tan, Ai Yang, Tu Lan, Jiali Liao, Yuanyou Yang, Ning Liu, Feize Li","doi":"10.1515/ract-2024-0306","DOIUrl":"https://doi.org/10.1515/ract-2024-0306","url":null,"abstract":"Multimodal imaging for precision medicine has received significant attention in recent years. In this work, we proposed to combine Cerenkov luminescence imaging (CLI) and SPECT-CT to systematically evaluate the real biodistribution of nanoscale metal-organic framework (MOF) in murine xenograft model. <jats:sup>177</jats:sup>Lu was incorporated into nanoscale MOF-76(Eu)/FA in high radiochemical yield to construct a multimodal probe with physiological stability. Subsequently, the <jats:sup>177</jats:sup>Lu-MOF-76(Eu)/FA shows adequate <jats:italic>in vitro</jats:italic> affinity and cytotoxicity to cancer cells. Furthermore, by comparing the SPECT imaging and CLI, we evaluated the feasibility of <jats:italic>in vivo</jats:italic> CLI application in preclinical studies of <jats:sup>177</jats:sup>Lu-radiopharmaceuticals. The results demonstrate that CLI address some limitations of fluorescence imaging based on organic dye molecule and enable accurate tracking <jats:sup>177</jats:sup>Lu radiolabeled compounds in major organs.","PeriodicalId":21167,"journal":{"name":"Radiochimica Acta","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142192181","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}
Leyla Akbari, Sedigheh Sina, Samaneh Zolghadri, Ali Moghaddasi, Kamal Hadad, Hassan Yousefnia
The prevalence rate of prostate cancer is very high and unfortunately causes many deaths worldwide. This study aimed to prepare [113mIn]In-PSMA as a novel agent for single photon emission computed tomography (SPECT) imaging of prostate cancer. 113mIn was eluted from an in-house made 113Sn/113mIn generator in chloride form, and its radionuclide, chemical and radiochemical purities was studied. [113mIn]In-PSMA was prepared with radiochemical purity (RCP) > 99 % under optimal labeling conditions. The biodistribution of the labeled compound was studied in normal rats, showed the major activity in the urine and kidneys as the main excretion route from the body. Considerable uptake was observed in the prostate and salivary glands as the PSMA-expressing organs. These data are in complete agreement with the other published data on PSMA-labeled compounds both in animals and humans. The results demonstrated [113mIn]In-PSMA can be considered as a good option for SPECT imaging of prostate cancer.
{"title":"[113mIn]In-PSMA: high potential agent for SPECT imaging of prostate cancer","authors":"Leyla Akbari, Sedigheh Sina, Samaneh Zolghadri, Ali Moghaddasi, Kamal Hadad, Hassan Yousefnia","doi":"10.1515/ract-2024-0298","DOIUrl":"https://doi.org/10.1515/ract-2024-0298","url":null,"abstract":"The prevalence rate of prostate cancer is very high and unfortunately causes many deaths worldwide. This study aimed to prepare [<jats:sup>113m</jats:sup>In]In-PSMA as a novel agent for single photon emission computed tomography (SPECT) imaging of prostate cancer. <jats:sup>113m</jats:sup>In was eluted from an in-house made <jats:sup>113</jats:sup>Sn/<jats:sup>113m</jats:sup>In generator in chloride form, and its radionuclide, chemical and radiochemical purities was studied. [<jats:sup>113m</jats:sup>In]In-PSMA was prepared with radiochemical purity (RCP) > 99 % under optimal labeling conditions. The biodistribution of the labeled compound was studied in normal rats, showed the major activity in the urine and kidneys as the main excretion route from the body. Considerable uptake was observed in the prostate and salivary glands as the PSMA-expressing organs. These data are in complete agreement with the other published data on PSMA-labeled compounds both in animals and humans. The results demonstrated [<jats:sup>113m</jats:sup>In]In-PSMA can be considered as a good option for SPECT imaging of prostate cancer.","PeriodicalId":21167,"journal":{"name":"Radiochimica Acta","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142192192","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}
Ahmed M. Shahr El-Din, Mohamed A. Gizawy, Emad H. Borai
No-carrier-added (NCA) 161 Tb, which has advisable nuclear properties to be applied for cancer radiotherapy was produced at the Egyptian Second Research Reactor (ETRR-2) by neutron irradiation of natural gadolinium target via indirect nuclear reaction. The radiochemical separation of 161 Tb from irradiated gadolinium target was investigated based on solvent extraction technique using Cyanex 302. Several separation parameters were checked and optimized. According to the obtained results, the separation process of the investigated radioisotopes proceeds in two steps. The first step is an extraction of all of them into the organic phase in which the extraction % (98 %) was optimized at pH 4, 0.15 M of Cyanex 302 and 2.5 h extraction time. Moreover, the slope analysis method confirmed the participation of 2 mol of the organic extractant for the separation of 161 Tb from irradiated gadolinium. The second step is the separation of the 161 Tb isotope that was purified by the stripping of 159Gd with a citrate solution at pH 9, which is considered as a highly efficient and promising method for separation and purification of the two radioisotopes.
{"title":"Radiochemical separation of 161 Tb from neutron irradiated Gd target by liquid-liquid extraction technique","authors":"Ahmed M. Shahr El-Din, Mohamed A. Gizawy, Emad H. Borai","doi":"10.1515/ract-2024-0286","DOIUrl":"https://doi.org/10.1515/ract-2024-0286","url":null,"abstract":"No-carrier-added (NCA) <jats:sup>161</jats:sup> Tb, which has advisable nuclear properties to be applied for cancer radiotherapy was produced at the Egyptian Second Research Reactor (ETRR-2) by neutron irradiation of natural gadolinium target via indirect nuclear reaction. The radiochemical separation of <jats:sup>161</jats:sup> Tb from irradiated gadolinium target was investigated based on solvent extraction technique using Cyanex 302. Several separation parameters were checked and optimized. According to the obtained results, the separation process of the investigated radioisotopes proceeds in two steps. The first step is an extraction of all of them into the organic phase in which the extraction % (98 %) was optimized at pH 4, 0.15 M of Cyanex 302 and 2.5 h extraction time. Moreover, the slope analysis method confirmed the participation of 2 mol of the organic extractant for the separation of <jats:sup>161</jats:sup> Tb from irradiated gadolinium. The second step is the separation of the <jats:sup>161</jats:sup> Tb isotope that was purified by the stripping of <jats:sup>159</jats:sup>Gd with a citrate solution at pH 9, which is considered as a highly efficient and promising method for separation and purification of the two radioisotopes.","PeriodicalId":21167,"journal":{"name":"Radiochimica Acta","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142192187","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}
Pancreatic cancer remains difficult to diagnose using currently available imaging probes. Thus, this study aimed to develop a novel imaging agent for the diagnosis of pancreatic cancer using positron emission tomography (PET). Specifically, this study explores gelatin-based nanoparticles fabricated via radiation-induced crosslinking, as gelatin is known for its ability to produce biocompatible materials. Aqueous gelatin solutions were irradiated with γ-rays to produce nanoparticles with average diameters of 5–20 nm via a radiation crosslinking technique. The gelatin nanoparticles were labeled with 64Cu, exhibiting negative surface potentials. Furthermore, the nanoparticles were evaluated in vivo by injecting them into pancreatic tumor-bearing mice. Notably, the nanoparticles accumulated in the tumors. Hence, 64Cu-labeled gelatin nanoparticles show promise as a platform for next-generation PET imaging agents for pancreatic cancer.
使用现有的成像探针仍然难以诊断胰腺癌。因此，本研究旨在开发一种新型成像剂，利用正电子发射断层扫描（PET）诊断胰腺癌。具体来说，本研究探讨了通过辐射诱导交联制造的明胶基纳米粒子，因为明胶以其制造生物相容性材料的能力而闻名。用 γ 射线照射明胶水溶液，通过辐射交联技术生成平均直径为 5-20 纳米的纳米颗粒。明胶纳米粒子被标记为 64Cu，呈现负表面电位。此外，还将纳米颗粒注射到胰腺肿瘤小鼠体内，对其进行了体内评估。值得注意的是，纳米粒子在肿瘤内积聚。因此，64Cu 标记的明胶纳米颗粒有望成为下一代胰腺癌 PET 成像剂的平台。
{"title":"Development of gelatin nanoparticles for positron emission tomography diagnosis in pancreatic cancer","authors":"Yumi Sugo, Atsushi Kimura, Tomoya Koizumi, Kotaro Oyama, Mitsumasa Taguchi","doi":"10.1515/ract-2024-0304","DOIUrl":"https://doi.org/10.1515/ract-2024-0304","url":null,"abstract":"Pancreatic cancer remains difficult to diagnose using currently available imaging probes. Thus, this study aimed to develop a novel imaging agent for the diagnosis of pancreatic cancer using positron emission tomography (PET). Specifically, this study explores gelatin-based nanoparticles fabricated via radiation-induced crosslinking, as gelatin is known for its ability to produce biocompatible materials. Aqueous gelatin solutions were irradiated with γ-rays to produce nanoparticles with average diameters of 5–20 nm via a radiation crosslinking technique. The gelatin nanoparticles were labeled with <jats:sup>64</jats:sup>Cu, exhibiting negative surface potentials. Furthermore, the nanoparticles were evaluated <jats:italic>in vivo</jats:italic> by injecting them into pancreatic tumor-bearing mice. Notably, the nanoparticles accumulated in the tumors. Hence, <jats:sup>64</jats:sup>Cu-labeled gelatin nanoparticles show promise as a platform for next-generation PET imaging agents for pancreatic cancer.","PeriodicalId":21167,"journal":{"name":"Radiochimica Acta","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142192184","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}
Aljawhara H. Almuqrin, M. I. Sayyed, F.F. Alharbi, M. Elsafi
This study analyzes the ZnO particle size’s effect on glass samples’ radiation shielding ability. Four glass samples with differing micro and nanoparticle ZnO content were investigated at four energies, 0.060, 0.662, 1.173, and 1.333 MeV. The investigated glasses are a B2O3–BaO–ZnO glass system and are composed of 30 % micro ZnO (30 M), 20 % micro ZnO and 10 % nano ZnO (20 M−10 N), 10 % micro ZnO and 20 % nano ZnO (10 M−20 N), and lastly 30 % nano ZnO (30 N). The theoretical XCOM software was employed to validate the experimental LAC values of the glasses, revealing that for at all energies, the values obtained from the two methods agreed with each other well. The glasses’ HVL, MFP, and RSE were then compared. The HVL values at all energies decreased as more nano ZnO was introduced into the glass system, reaching a minimum of 1.947 cm at 0.662 MeV for the 30 N sample. This sample also had the lowest MFP at all energies, while the 30 M glass had the highest, such as 0.088 and 0.070 for 30 M and 30 N respectively at 0.060 MeV. The RSE of a 1 cm thick sample of each of the glasses was tested and found that the 30 N sample exhibited the greatest RSE. The relative percent deviation between the 30 N and 30 M glasses was also analyzed, which highlighted the difference between 30 N’s greater LAC values compared to 30 M at all energies.
{"title":"Effect of ZnO particle size on the radiation shielding efficiency of B2O3–BaO–ZnO glass system","authors":"Aljawhara H. Almuqrin, M. I. Sayyed, F.F. Alharbi, M. Elsafi","doi":"10.1515/ract-2024-0312","DOIUrl":"https://doi.org/10.1515/ract-2024-0312","url":null,"abstract":"This study analyzes the ZnO particle size’s effect on glass samples’ radiation shielding ability. Four glass samples with differing micro and nanoparticle ZnO content were investigated at four energies, 0.060, 0.662, 1.173, and 1.333 MeV. The investigated glasses are a B<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub>–BaO–ZnO glass system and are composed of 30 % micro ZnO (30 M), 20 % micro ZnO and 10 % nano ZnO (20 M−10 N), 10 % micro ZnO and 20 % nano ZnO (10 M−20 N), and lastly 30 % nano ZnO (30 N). The theoretical XCOM software was employed to validate the experimental LAC values of the glasses, revealing that for at all energies, the values obtained from the two methods agreed with each other well. The glasses’ HVL, MFP, and RSE were then compared. The HVL values at all energies decreased as more nano ZnO was introduced into the glass system, reaching a minimum of 1.947 cm at 0.662 MeV for the 30 N sample. This sample also had the lowest MFP at all energies, while the 30 M glass had the highest, such as 0.088 and 0.070 for 30 M and 30 N respectively at 0.060 MeV. The RSE of a 1 cm thick sample of each of the glasses was tested and found that the 30 N sample exhibited the greatest RSE. The relative percent deviation between the 30 N and 30 M glasses was also analyzed, which highlighted the difference between 30 N’s greater LAC values compared to 30 M at all energies.","PeriodicalId":21167,"journal":{"name":"Radiochimica Acta","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142192183","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}
Ömer Kaban, Gülçin Bilgici Cengiz, İlyas Çağlar, Gökhan Bilir
In this study, we have reported on the effect of the rare earth oxides on the radiation protection performance of the tellurite glasses. In order to determine the effect of rare earth oxides on the radiation shielding properties of tungsten oxide (WO3) modified tellurite glasses, three rare earth element oxides (Nd2O3, Yb2O3, and Er2O3) have been selected. The glass systems have been synthesized using the traditional melt quenching method and were doped with the different amount (1 %, 3 %, 5 %) of the oxides of rare earth elements (Nd2O3, Yb2O3, Er2O3). The linear attenuation coefficient, mass attenuation coefficient, half value layer, and effective atomic number of the synthesized samples were experimentally measured for 662, 1,173 and 1,332 keV gamma-ray energies which were emitted from 137Cs and 60Co radioactive sources. Measurements were conducted in narrow beam transmission geometry using a NaI(Tl) scintillation detector. In addition, all these parameters were calculated theoretically using the WinXCOM program in the energy region of 0.015–15 MeV. The addition of different types and amounts of rare earth oxides to the tellurite glass system was found to significantly enhance the radiation protection performance of the glasses. In particular, it was found that the radiation shielding characteristics of the glasses improved with increasing amount of rare earth doping, the TWYb5 glass system had the best radiation shielding properties, and there was a trend among the doped rare earth oxides in the form of Yb > Er > Nd according to their radiation shielding performance.
{"title":"The effect of rare earths (Nd3+, Er3+, Yb3+) additives on the radiation shielding properties of the tungsten oxide modified tellurite glasses","authors":"Ömer Kaban, Gülçin Bilgici Cengiz, İlyas Çağlar, Gökhan Bilir","doi":"10.1515/ract-2024-0297","DOIUrl":"https://doi.org/10.1515/ract-2024-0297","url":null,"abstract":"In this study, we have reported on the effect of the rare earth oxides on the radiation protection performance of the tellurite glasses. In order to determine the effect of rare earth oxides on the radiation shielding properties of tungsten oxide (WO<jats:sub>3</jats:sub>) modified tellurite glasses, three rare earth element oxides (Nd<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub>, Yb<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub>, and Er<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub>) have been selected. The glass systems have been synthesized using the traditional melt quenching method and were doped with the different amount (1 %, 3 %, 5 %) of the oxides of rare earth elements (Nd<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub>, Yb<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub>, Er<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub>). The linear attenuation coefficient, mass attenuation coefficient, half value layer, and effective atomic number of the synthesized samples were experimentally measured for 662, 1,173 and 1,332 keV gamma-ray energies which were emitted from <jats:sup>137</jats:sup>Cs and <jats:sup>60</jats:sup>Co radioactive sources. Measurements were conducted in narrow beam transmission geometry using a NaI(Tl) scintillation detector. In addition, all these parameters were calculated theoretically using the WinXCOM program in the energy region of 0.015–15 MeV. The addition of different types and amounts of rare earth oxides to the tellurite glass system was found to significantly enhance the radiation protection performance of the glasses. In particular, it was found that the radiation shielding characteristics of the glasses improved with increasing amount of rare earth doping, the TWYb5 glass system had the best radiation shielding properties, and there was a trend among the doped rare earth oxides in the form of Yb > Er > Nd according to their radiation shielding performance.","PeriodicalId":21167,"journal":{"name":"Radiochimica Acta","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142192154","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}
Kundan Kishore, Kuldeep K. Shukla, Manas R. Sahoo, Kedareswar Pradhan, Rajkumari Bhol, Subash C. Swain
The aim of this research is to assess the effectiveness of gamma irradiation in developing genetic variability in dragon fruit by influencing biochemical attributes. Seeds of dragon fruit were exposed to 100, 200, 300, 400 and 500 Gy γ-radiation using Co-60 source. Highest germinability, mean germination time, mean daily germination, vigour index and growth rate were observed in untreated seeds, however these traits were relatively less affected at lower irradiation level (up to 200 Gy). An irradiation level of ≥ 400 Gy severely affected germination traits and seedling growth and consequently 441 Gy irradiation level was considered as the lethal dose (LD50) for dragon fruit. Photosynthetic pigments, protein content and nutrient content were highest in untreated seedlings and moderately high up to 200 Gy. Findings demonstrated that the concentration of biochemical markers for abiotic stress tolerance viz. proline, phenol, flavonoid and antioxidant enzymes (superoxide dismutase, catalase and ascorbate peroxidase), were significantly high at 200 Gy irradiation level. Hence an irradiation dose of 200 Gy may be considered as an optimal for induced mutagenesis for abiotic stress tolerance in dragon fruit with the least possible unintended damage to seedling growth traits. The findings provide valuable insights into the efficient utilization of γ-irradiation in expediting the development of abiotic stress-tolerant mutant lines of dragon fruit.
{"title":"Influence of gamma irradiation on germination traits, growth and biochemical attributes of dragon fruit (Selenicereus monacanthus)","authors":"Kundan Kishore, Kuldeep K. Shukla, Manas R. Sahoo, Kedareswar Pradhan, Rajkumari Bhol, Subash C. Swain","doi":"10.1515/ract-2024-0294","DOIUrl":"https://doi.org/10.1515/ract-2024-0294","url":null,"abstract":"The aim of this research is to assess the effectiveness of gamma irradiation in developing genetic variability in dragon fruit by influencing biochemical attributes. Seeds of dragon fruit were exposed to 100, 200, 300, 400 and 500 Gy γ-radiation using Co-60 source. Highest germinability, mean germination time, mean daily germination, vigour index and growth rate were observed in untreated seeds, however these traits were relatively less affected at lower irradiation level (up to 200 Gy). An irradiation level of ≥ 400 Gy severely affected germination traits and seedling growth and consequently 441 Gy irradiation level was considered as the lethal dose (LD<jats:sub>50</jats:sub>) for dragon fruit. Photosynthetic pigments, protein content and nutrient content were highest in untreated seedlings and moderately high up to 200 Gy. Findings demonstrated that the concentration of biochemical markers for abiotic stress tolerance viz. proline, phenol, flavonoid and antioxidant enzymes (superoxide dismutase, catalase and ascorbate peroxidase), were significantly high at 200 Gy irradiation level. Hence an irradiation dose of 200 Gy may be considered as an optimal for induced mutagenesis for abiotic stress tolerance in dragon fruit with the least possible unintended damage to seedling growth traits. The findings provide valuable insights into the efficient utilization of γ-irradiation in expediting the development of abiotic stress-tolerant mutant lines of dragon fruit.","PeriodicalId":21167,"journal":{"name":"Radiochimica Acta","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142192155","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}
Qiaorong Ye, Chensi Zeng, Yanfang Gong, Chenxi Qi, Xianghua Zeng, Ni Tan
To further improve the uranyl adsorption capacity and the selectivity adsorption ability of marine fungus ZZF51 from Zhanjiang sea area in China, its two new modification biosorbents (ZTBA/ZTDA) linked by the open-chain polyether terminal with two/one amidoxime unit(s) on mycelium were designed according to the synthesis process of etherification, sulfonylation, substitution, and amidoximation. By the reasonable characterization of Fourier-transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), thermogravimetric analysis (TG), and scanning electron microscopy (SEM), it was confirmed that the above target materials were successfully prepared. The relevant experiments showed that both of ZTBA and ZTDA had not only the excellent uranium (VI) adsorption performance with the maximum adsorption capacity of 525.7 mg g−1 and 465.7 mg g−1, respectively, but also the better uranyl adsorption selectivity when in the simulated wastewater containing the various ions of UO2 2+, Th4+, Ba2+, Pb2+, Fe3+, Cu2+, and Ca2+. In addition, the selectivity analysis explored the longer polyether in the middle bridge and the more number of terminal amidoxime unit could synergistically improve their uranyl adsorption capacity and selectivity performance. Surely, the adsorption isotherm/kinetics models, the Gibbs free energy analysis, and the favourable reusability of the target materials were also discussed in this study in detail.
{"title":"The collaboratively selective uranyl adsorption of marine fungal modification biosorbent linked by the open-chain polyether terminal with amidoxime","authors":"Qiaorong Ye, Chensi Zeng, Yanfang Gong, Chenxi Qi, Xianghua Zeng, Ni Tan","doi":"10.1515/ract-2024-0296","DOIUrl":"https://doi.org/10.1515/ract-2024-0296","url":null,"abstract":"\u0000 To further improve the uranyl adsorption capacity and the selectivity adsorption ability of marine fungus ZZF51 from Zhanjiang sea area in China, its two new modification biosorbents (ZTBA/ZTDA) linked by the open-chain polyether terminal with two/one amidoxime unit(s) on mycelium were designed according to the synthesis process of etherification, sulfonylation, substitution, and amidoximation. By the reasonable characterization of Fourier-transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), thermogravimetric analysis (TG), and scanning electron microscopy (SEM), it was confirmed that the above target materials were successfully prepared. The relevant experiments showed that both of ZTBA and ZTDA had not only the excellent uranium (VI) adsorption performance with the maximum adsorption capacity of 525.7 mg g−1 and 465.7 mg g−1, respectively, but also the better uranyl adsorption selectivity when in the simulated wastewater containing the various ions of UO2\u0000 2+, Th4+, Ba2+, Pb2+, Fe3+, Cu2+, and Ca2+. In addition, the selectivity analysis explored the longer polyether in the middle bridge and the more number of terminal amidoxime unit could synergistically improve their uranyl adsorption capacity and selectivity performance. Surely, the adsorption isotherm/kinetics models, the Gibbs free energy analysis, and the favourable reusability of the target materials were also discussed in this study in detail.","PeriodicalId":21167,"journal":{"name":"Radiochimica Acta","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141929325","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}
Eman M. Mahrous, Ateyyah M. Al-Baradi, Kh. S. Shaaban
Melt-quenching was used to create high density glasses with a chemical composition of (15-x) Na2O–45B2O3–20Bi2O3–20SiO2–xLa2O3, where, x = (0 ≤ x ≥ 15) mol%. Through the use of (XRD) analysis, the amorphous status of these glasses was ascertained. We examined on the synthetic glasses physical attributes as well as their ability to shield against gamma radiation. The density increased from 4.913 g/cm3 for BBSNLa0 glass to 6.497 g/cm3 for BBSNLa15 glass. The study employed the Phy-X/PSD code to explore the radiation shielding properties of these glasses. As the mol% of La2O3 increases, the MFP decreases. This indicates that glass samples with a higher concentration of La2O3 have a greater ability to attenuate or absorb photons, resulting in a shorter average distance traveled before interaction. The BBSNLa-15 glass sample is the best choice for applications in radiation protection.
{"title":"Significant influence of La2O3 content on radiation shielding characteristics properties of bismuth sodium borosilicate glasses","authors":"Eman M. Mahrous, Ateyyah M. Al-Baradi, Kh. S. Shaaban","doi":"10.1515/ract-2024-0307","DOIUrl":"https://doi.org/10.1515/ract-2024-0307","url":null,"abstract":"Melt-quenching was used to create high density glasses with a chemical composition of (<jats:italic>15-x</jats:italic>) Na<jats:sub>2</jats:sub>O–45B<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub>–20Bi<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub>–20SiO<jats:sub>2</jats:sub>–<jats:italic>x</jats:italic>La<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub>, where, <jats:italic>x</jats:italic> = (0 ≤ <jats:italic>x</jats:italic> ≥ 15) mol%. Through the use of (XRD) analysis, the amorphous status of these glasses was ascertained. We examined on the synthetic glasses physical attributes as well as their ability to shield against gamma radiation. The density increased from 4.913 g/cm<jats:sup>3</jats:sup> for BBSNLa0 glass to 6.497 g/cm<jats:sup>3</jats:sup> for BBSNLa15 glass. The study employed the Phy-X/PSD code to explore the radiation shielding properties of these glasses. As the mol% of La<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub> increases, the MFP decreases. This indicates that glass samples with a higher concentration of La<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub> have a greater ability to attenuate or absorb photons, resulting in a shorter average distance traveled before interaction. The BBSNLa-15 glass sample is the best choice for applications in radiation protection.","PeriodicalId":21167,"journal":{"name":"Radiochimica Acta","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141939822","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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