Synthesis, 99m Tc-radiolabeling and in vivo evaluation of a new sulphonamide derivative for solid tumor imaging
In conclusion,99mTc-EPBS agent showed favorable characteristics for the radio-diagnosis of solid tumors. (Source: Journal of Radioanalytical and Nuclear Chemistry)
Source: Journal of Radioanalytical and Nuclear Chemistry - August 5, 2020 Category: Nuclear Medicine Source Type: research

Back propagation neural network analysis for the detection of explosives based on tagged neutron
AbstractA system for detecting explosives in walls based on the tagged neutron method was established. An associated particle neutron generator ING-27 developed by the All-Russian Research Institute of Automatics (VNIIA) is used as the neutron source, two yttrium lutetium silicate (LYSO) detectors are used for the γ detector, and a silicon detector is used as the α detector. The α-γ coincidence spectra of 300 g ammonium nitrate and TNT samples placed behind 10 cm concrete wall were measured. A neural network algorithm was applied to analyze the data. Through fine selection of time windows ...
Source: Journal of Radioanalytical and Nuclear Chemistry - August 5, 2020 Category: Nuclear Medicine Source Type: research

Non-destructive determination of uranium and plutonium in annular (U, Pu)O 2 mixed oxide sintered pellets by wavelength dispersive X-ray fluorescence spectrometry
AbstractA non-destructive wavelength dispersive X-ray fluorescence (WDXRF) spectrometric method for direct determination of uranium and plutonium in as fabricated annular sintered (U, Pu)O2 mixed oxide (MOX) pellets avoiding the traditional cumbersome sample preparation involving dissolution or comminution –pelletization of sample has been developed. Sintered (U, Pu)O2 MOX pellets were directly analyzed using this method by taking the sample pellets inside an indigenously developed special collet which was loaded in the spectrometer for WDXRF measurements. The developed methodology has the utility for regular analysi...
Source: Journal of Radioanalytical and Nuclear Chemistry - August 5, 2020 Category: Nuclear Medicine Source Type: research

U(VI) sorption onto natural sorbents
AbstractThis investigation made it possible to compare the sorption capacity of mineral and organic sorbents in respect to U(VI). In order to establish the patterns of sorption, natural sorbents with a high content of rock-forming mineral were used: glauconite, diatomite, zeolite, peat, brown and hard coals, shungite. Each sample was characterized using X-ray diffraction, X-ray fluorescence method, scanning electron microscope, XPS spectra, potentiometric acid –base titration and surface area measurement. The partitioning of U(VI) was determined by sequential extraction technique. It was shown that the highest sorpti...
Source: Journal of Radioanalytical and Nuclear Chemistry - August 5, 2020 Category: Nuclear Medicine Source Type: research

Evaluation of promethium-147 production by irradiating natural neodymium using medium-flux Tehran research reactor
In this study, the production of147Pm is evaluated by the irradiation of a neodymium (Nd) target in a medium-flux reactor, and147Pm is separated from the Nd-target material using Ln resin. Theoretical calculations and practical experiments have been performed, and an acceptable level of compliance between the predicted results and the obtained practical activity was observed. Furthermore,147Pm with sufficient activity and minimal impurities was produced using the developed process. (Source: Journal of Radioanalytical and Nuclear Chemistry)
Source: Journal of Radioanalytical and Nuclear Chemistry - August 5, 2020 Category: Nuclear Medicine Source Type: research

Integrating isotope mass balance and water residence time dating: insights of runoff generation in small permafrost watersheds from stable and radioactive isotopes
Abstract40 small watersheds in the Source Area of the Yellow River were investigated recently to sample surface waters, groundwater and ground ice, and their water isotopic signatures (2H,18O,3H, and222Rn) have been measured. A novel isotope mass balance approach was developed to estimate annual surface and surface flow discharges in catchment combined water age dating. This approach revealed the changing surface and subsurface runoff patterns were along the hydrological trajectory of progressive permafrost degradation. To build up the linkages between the hydrological indictors and environmental and biological features wa...
Source: Journal of Radioanalytical and Nuclear Chemistry - August 4, 2020 Category: Nuclear Medicine Source Type: research

Study of the ability of 2-AMPR resin to separate Re(VII) from U(VI) in acidic aqueous solutions
AbstractIn this work, the 2-AMPR resin was used to separate rhenium from uranium in acidic aqueous solution. The morphology and structure of 2-AMPR before and after adsorption were characterized using SEM, FT-IR, and XPS. In both the static and dynamic adsorption –desorption experiments, the 2-AMPR resin showed excellent enrichment capacity for rhenium, which means that the 2-AMPR anion exchange resin has good industrial application prospects in terms of recovery of rhenium. (Source: Journal of Radioanalytical and Nuclear Chemistry)
Source: Journal of Radioanalytical and Nuclear Chemistry - August 4, 2020 Category: Nuclear Medicine Source Type: research

Carbon-backed thin tin ( 116 Sn) isotope target fabrication by physical vapor deposition technique
AbstractIn nuclear reaction experiments, the thin targets are required. In the present work, 30 thin116Sn targets were prepared using physical vapor deposition technique (preferable for thin film fabrication) on carbon backing with usage efficiency of 98%. The carbon-backed thin target films along with the parting agents are deposited on the particular substrates using a diffusion pump based coating unit. The thicknesses of the targets were verified using α-energy loss and RBS technique and they were in good agreement with each other. The purity of the target, verified using RBS, EDS and XRD techniques, were also tes...
Source: Journal of Radioanalytical and Nuclear Chemistry - August 4, 2020 Category: Nuclear Medicine Source Type: research

Measurement of 115 In(n,2n) 114m In and 197 Au(n,2n) 196 Au reaction cross sections at the neutron energies of 13.52 and 14.54  MeV with covariance analysis
AbstractThe115In(n,2n)114mIn and197Au(n,2n)196Au reaction cross sections have been measured relative to the27Al(n, α)24Na monitor reaction at the two different incident neutron energies of 13.520  ± 0.005 MeV and 14.54 ± 0.24 MeV. The neutrons from the D-T fusion reaction at the Purnima neutron generator were used for activation followed by off-line γ-ray spectrometry. The uncertainty propagation and correlation of measured reaction cross sections were estimated using covariance analysis through considering the partial uncertainties in different attributes. Th...
Source: Journal of Radioanalytical and Nuclear Chemistry - August 3, 2020 Category: Nuclear Medicine Source Type: research

Radiation effect on ionic liquid [Hbet][Tf 2 N] for Nd 2 O 3 separation from simulated spent nuclear fuels
AbstractRadiation-chemical stability of ionic liquid [Hbet][Tf2N] has been investigated under gamma irradiation for Nd2O3 separation from simulated spent nuclear fuels. It was found that Nd2O3 dissolution decreases with increasing absorbed dose of [Hbet][Tf2N]. However, the dissolution ability of irradiated [Hbet][Tf2N] to Nd2O3 can be regenerated after washing with water. The radiolytic products of [Hbet][Tf2N] were identified by EMI –MS, and [Hbet]+ group occurred a little radiolysis during irradiation. The UV –Visible spectra shown an increase in absorption around 275 nm probably due to the radiolysis o...
Source: Journal of Radioanalytical and Nuclear Chemistry - August 2, 2020 Category: Nuclear Medicine Source Type: research

Neutron depth profiling using the reactions 10 B (n, α) 7 Li and 6 Li(n,α) 3 H induced by thermal neutrons
AbstractSamples like p-type silicon and metallic glasses containing boron, were taken and used as target to induce the reaction10B (n, α)7Li. In addition, samples containing lithium were also irradiated with thermal neutrons to induce6Li (n, α)3H reaction. The alpha particles emitted through the reactions lose energy while traversing through the sample from point of emission to the surface and can be detected using a surface barrier detector. The out coming alpha particle spectrum can give the depth profile of boron or lithium atoms in the sample, if the energy loss of alpha particle within the matrix is known....
Source: Journal of Radioanalytical and Nuclear Chemistry - August 2, 2020 Category: Nuclear Medicine Source Type: research

Adsorption and separation of Re(VII) using trimethylamine-functionalized strong base anion exchange resin
This study demonstrates a new approach for the separation and recovery of Re(VII) from U(VI)-containing effluent by using amino-modified polystyrene-divinylbenzene microspheres. (Source: Journal of Radioanalytical and Nuclear Chemistry)
Source: Journal of Radioanalytical and Nuclear Chemistry - August 1, 2020 Category: Nuclear Medicine Source Type: research

Quantification of boron contents in BN/BCN composites by prompt gamma-ray neutron activation analysis utilizing thermal neutron beam at Dhruva reactor
AbstractSamples of boron (B) doped g-C3N4 (BCN) and boron nitride (BN) composite (BN/BCN) were synthesized by a simple in situ technique by varying BN content in the range of 1 –10% mass fraction and boron contents are crucial for improving the activity of the composites. The composites were characterized by PXRD and FTIR in order to confirm their successful formation. Prompt Gamma Neutron Activation Analysis (PGNAA) using thermal neutron beam from Dhruva reactor was use d for non-destructive determination of total boron concentration by measuring 478 keV prompt gamma-ray from10B (n,αγ)7*Li reaction....
Source: Journal of Radioanalytical and Nuclear Chemistry - August 1, 2020 Category: Nuclear Medicine Source Type: research

Free-radical scavenging activity of radioprotectors: comparison between clinically used radioprotectors and natural antioxidants
AbstractClinically used radioprotectors, amifostine and cysteamine, have been shown to possess free-radical scavenging activities. Natural antioxidants also possess free-radical scavenging activities, some of which have been shown to have radioprotective capability. We carried out a quantitative determination of the scavenging abilities in amifostine and cysteamine and compared the potencies with natural antioxidants by using multiple free-radical scavenging method. Overall, amifostine and cysteamine showed scavenging activity as potent as natural antioxidants. We found a correlation between scavenging activity and radiopr...
Source: Journal of Radioanalytical and Nuclear Chemistry - July 21, 2020 Category: Nuclear Medicine Source Type: research

Gamma-radiation assisted preparation of Au/Fe 3 O 4 /poly(styrene-sodium styrene sulphonate) magnetic composite microspheres for catalysis
AbstractMagnetic Au/Fe3O4/poly(styrene-sodium styrene sulphonate) composite microspheres (Au/Fe3O4/P(St-NaSS) CMs) were successfully prepared via a gamma-radiation method. Au and Fe3O4 were formed at the same time under irradiation and well dispersed on uniform P(St-NaSS) microspheres. The as-prepared CMs exhibit good catalytic properties and recyclable performances for the catalytic reduction of 4-nitrophenol (4-NP). The kinetic rate constants are 8.75  × 10−3 s−1 and 7.71  × 10−3 s−1 for two samples, respectively. The conversion rate of 4-NP can keep about 9...
Source: Journal of Radioanalytical and Nuclear Chemistry - July 21, 2020 Category: Nuclear Medicine Source Type: research

CR-39 track detectors for measurements of radon volume activity and exhalation rates of the new houses of the Tashkent city
AbstractThe latest years, most of the detached dwellings in Tashkent city have been constructed with two or three floors houses by using burnt bricks. Dynamic increase of these houses with using of different building materials demands us to know about the radon quantity in the new houses. The main objective of this study is to perform measurements of radon indoor, in winter and summer, to determinate the annual effective doses and estimate the rate that exhales from soils, building materials and walls by using CR-39 detectors. The results of measurements have given the following: the mean values of indoor radon activities ...
Source: Journal of Radioanalytical and Nuclear Chemistry - July 21, 2020 Category: Nuclear Medicine Source Type: research

Preparation and evaluation of 99m Tc-anidulafungin: a potential radiotracer for fungal infection
AbstractAiming to develop specific diagnostic tool for invasive fungal infection, a radiopharmaceutical based on anidulafungin was investigated. A two-step approach was used to label the drug with technetium-99m to retain its biological activity.99mTc-tricarbonyl-Anidulafugin complex was obtained in high radiochemical yield (~98%). The complex was radio-chemically characterized and physico-chemically evaluated to assess its suitability as a radiopharmaceutical. Thereafter, it was evaluated in vitro and in vivo using different models; sterile inflammation, bacterial and fungal infection in mice and showed specific accumul...
Source: Journal of Radioanalytical and Nuclear Chemistry - July 15, 2020 Category: Nuclear Medicine Source Type: research

Filter paper-based optical sensor for the highly sensitive assessment of thorium in rock samples
AbstractFilter paper-based optical sensors (FPOS) offer rapid and sensitive quantification of analytes. Herein we report, a simple, sensitive, selective and low-cost FPOS for Th(IV) determination. Filter paper strips, impregnated with Morin reagent are reacted with Th(IV) yielding an intense yellow complex whose RGB (red/green/blue) color intensities made the basis of the assessment. A plot of the blue channel color absorbance versus Th(IV) concentration was linear up to 4.0  µg mL− 1 with a detection limit of 0.1  µg mL− 1. The proposed method was accurate, precise and relia...
Source: Journal of Radioanalytical and Nuclear Chemistry - July 15, 2020 Category: Nuclear Medicine Source Type: research

Lithium isotope effect in extraction of lithium chloride by 4-Aminobenzo-15-crown-5 in water-anisole ionic liquid double solvent system
AbstractThe lithium isotope separation (LIS) plays a vital role in development of nuclear industry. The liquid –liquid extraction technologies open up new possibilities for LIS. This work presents preliminary results of the study on the extractions and separation of6Li/7Li by mixed system, comprising amino-derivatives of benzo-15-crown-5 (4AB), ionic liquid and anisole. 4AB was used as an extractant. The eparation factor (α) is 1.031  ± 0.001, and abundance of6Li in loaded organic phase is 7.76%. Meanwhile, the reason why 4AB has better separation efficiency than B15C5 was explored brief by...
Source: Journal of Radioanalytical and Nuclear Chemistry - July 14, 2020 Category: Nuclear Medicine Source Type: research

Investigation on the soil gas radon concentrations in Northwest Huahai Basin, Gansu Province, China
In this study, radon (222Rn) measurements were taken at a soil depth of 0.70  m in the northwest of Huahai Basin in Gansu Province, China. It ranged from 110 to 3715 Bq m−3 with mean value of 1368  Bq m−3. In the soil samples, most element compositions were close to the background data in China, whereas the U content was 91  ppm in the well ZHK3-1. These results indicate that higher radon level are related to lithogenic background such as the deeper uraniferous sandstone and concealed faults, providing the support for the protection for radiation exposure in this area. (Source: Jou...
Source: Journal of Radioanalytical and Nuclear Chemistry - July 14, 2020 Category: Nuclear Medicine Source Type: research

Assessment of radiological dose from exposure to attached and unattached fractions of radon ( 222 Rn) and thoron ( 220 Rn) in indoor atmosphere
In this study pin hole dosimeter with deposition based progeny sensors were used to estimate222Rn,220Rn and their daughters in the indoor atmosphere. The estimated annual average indoor222Rn and220Rn activity concentration were found to be 76.4  Bq m−3 and 93.5  Bq m−3, respectively. The mean value of EEC for radon and thoron was 45.5  Bq m−3 and 1.3  Bq m−3 respectively. The annual effective dose due to indoor222Rn and220Rn were found to be 2.9 mSv  y−1 and 0.4 mSv  y−1 respectively. The estimated effective doses are well below the safe ...
Source: Journal of Radioanalytical and Nuclear Chemistry - July 14, 2020 Category: Nuclear Medicine Source Type: research

Evidences for the use of 14 C content in the root exudates as a novel application of radiocarbon labelling for screening iron deficiency tolerance of soybean ( Glycine max (L.) Merr.) genotypes
AbstractFour genotypes of soybean viz. NRC-45, IC-18734, J-231 and G-2132, which differ in their inherent ability to tolerate iron limiting stress, were selected as representative genotypes for iron efficient and responsive (FeER), iron inefficient and responsive (FeIR), iron efficient and nonresponsive (FeENR) and iron inefficient and nonresponsive (FeINR) categories, respectively. The relative performance of these genotypes to iron limiting stress was evaluated in hydroponics experiment with low iron ( −Fe) and sufficient iron (+Fe). We hypothesised that the genotype exhibiting higher iron deficiency tolerance woul...
Source: Journal of Radioanalytical and Nuclear Chemistry - July 13, 2020 Category: Nuclear Medicine Source Type: research

MCNPX simulation and experimental tests of the tagged neutron system for explosive detection in walls
AbstractAn experimental detection system based on tagged neutron method was developed for detecting the explosives embedded in a concrete wall. The simulant samples of TNT and ammonium nitrate were tested by this system under different conditions. The experimental results were compared with the MCNPX code simulation results and have good consistency. On this basis, the simulation of RDX and Tetryl explosives hidden in different thickness walls was carried out. The simulation results show that the experimental system can detect the 300  g explosive hidden in a wall with a thickness of no more than 10 cm by using t...
Source: Journal of Radioanalytical and Nuclear Chemistry - July 13, 2020 Category: Nuclear Medicine Source Type: research

Radiological hazard parameters of natural radionuclides for neoproterozoic rocks from Wadi Um Huytat in central eastern desert of Egypt
AbstractThe aim of this study is to evaluate the radioactivity levels and radiological impacts of representative neoproterozoic rocks: monzogranite, dokhan volcanics, syenogranite, granodiorite, gabbro and metabasalt samples collected from Wadi Um Huytat region in central eastern desert of Egypt using HPGe detector and Alpha GUARD. Remotely sensed data (Landsat 8 OLI) also used in order to appear the high reflectance appearance of neoproterozoic rocks which contain high concentration of radioactive elements. Rhyolite rocks have the highest average concentration of radionuclides of226Ra,232Th,40K and222Rn. Our results aimed...
Source: Journal of Radioanalytical and Nuclear Chemistry - July 12, 2020 Category: Nuclear Medicine Source Type: research

Inorganic silica gel functionalized tris(2-aminoethyl)amine moiety for capturing aqueous uranium (VI) ion
AbstractThe silica gel functionalized tris(2-aminoethyl)amine moiety (SG-TAEA-NH2) has been successfully used for capturing aqueous uranium ion by batch sorption. Various sorption experiments are performed using several variables such as pH, initial concentration, contact time, and temperature. These variables enable us to study the thermodynamic and kinetic of sorption, which in turn, leads to know more about the interaction and behavior of the uranium ion on the surface. The equilibrium of sorption can be achieved within the firstt = 5–10 min upon the study conditions (Ci = 1 m...
Source: Journal of Radioanalytical and Nuclear Chemistry - July 9, 2020 Category: Nuclear Medicine Source Type: research

Development of a Bi/Tl separation scheme for the proof of 209 Bi α-decay in old mineral samples
AbstractThe aim of this study is the development of a separation technique for geological samples, namely bismuthinites, with the goal to isolate Tl from excess amounts of Bi. This will enable an isotopic measurement of the Tl content on the ultra-trace level to identify a possible signature of Bi α-decay. The separation of Tl from other elements like e.g. Pb has been the subject of numerous studies. However, the separation of ultra-traces of Tl from bulk Bi had not yet been investigated sufficiently. This paper describes a separation technique for the system Bi/Tl for application to ultra-t race analysis. The separa...
Source: Journal of Radioanalytical and Nuclear Chemistry - July 8, 2020 Category: Nuclear Medicine Source Type: research

Separation of actinium-227 and its daughter radium-223 from phosphogypsum
AbstractA new method for separation and purification of227Ac and223Ra from phosphogypsum was developed.227Ac was leached from phosphogypsum using nitric acid solution (3  mol L−1), and purified using Dowex 1  × 8 and Dowex 50wx8 ion exchangers. The maximum separation recovery was about 86%.223Ra was separated from the purified227Th/227Ac solution using UTEVA resin, while RE resin was used to separate227Ac from the mixture. The method can be used in the preparation of a source with an activity concentration of 10  kBq of227Ac, by leaching one ton of phosphogypsum containing 11  ...
Source: Journal of Radioanalytical and Nuclear Chemistry - July 8, 2020 Category: Nuclear Medicine Source Type: research

Thermal plasma technology for radioactive waste treatment: a review
AbstractIn this paper, a review of radioactive wastes treatment using thermal plasma technology is presented as a treatment method for radioactive waste management. Virtually all waste streams can be treated by the thermal plasma technologies, resulting in a conditioned product, free from organics and liquids, definitely meeting the acceptance criteria for safe storage and disposal. The application of the thermal plasma system in the nuclear area is still one of the current research topics due to the theoretical and practical complexity of the treatment. This paper discusses the performance of the thermal plasma systems,...
Source: Journal of Radioanalytical and Nuclear Chemistry - July 8, 2020 Category: Nuclear Medicine Source Type: research

Development of an external (in air) in situ current normalized particle induced gamma-ray emission method utilizing 3.5  MeV proton beam from FOTIA for rapid quantification of low Z elements in glass and ceramic samples
AbstractAn external particle induced gamma-ray emission (in air) PIGE facility has been set up for the first time at FOTIA, BARC for rapid and non-destructive quantification of low Z elements. Proton beam of energy of  3.5 MeV was obtained on the target using a 25 μm Tantalum window and Ta collimator of 5 mm diameter. The in situ current normalized PIGE method was validated by quantifying low Z elements in a mixed synthetic standard and in two (certified / standard) reference materials namely USGS CRM G2 a nd NIST SRM 620. The external PIGE method was applied to lithium-based ceramics,...
Source: Journal of Radioanalytical and Nuclear Chemistry - July 6, 2020 Category: Nuclear Medicine Source Type: research

Correlation of the ambient dose equivalent rate and meteorological parameters
AbstractIn this paper, the results of ambient dose equivalent rate measurements at different locations are presented. At every location measurements were performed twice a day, in the morning and afternoon. One of the aim of this study was to determine the impact of weather conditions on the ambient dose equivalent rate. Correlation between ambient dose equivalent rate values and the meteorological parameters such as temperature, pressure and relative humidity are analyzed. A moderate positive correlation was found between the ambient dose rate and pressure in the morning measurements. The average annual effective dose is ...
Source: Journal of Radioanalytical and Nuclear Chemistry - July 6, 2020 Category: Nuclear Medicine Source Type: research

Oxidative digestion of spent sulfocationites containing radioactive rare earth and transplutonium elements
AbstractIn this work, the chemical digestion conditions for spent KU-2  × 8 sulfocationites manufactured in Russia were investigated. It was shown that the complete oxidative digestion of the ionites could be performed in solutions of H2O2 and HNO3 in the presence of Fe3+ ions adsorbed on the resin as an oxidation catalyst. The total digestion time of the resin was studied as a function of the presence of the digestion catalysts, solid-to-liquid phase ratio, process temperature, Fe3+ ion content in the solid sulfocationite phase, and the divinylbenzene (DVB) cross-linking agent content of the ionite. A ...
Source: Journal of Radioanalytical and Nuclear Chemistry - July 6, 2020 Category: Nuclear Medicine Source Type: research

Experimental study on the application of Eluex process in acid ISL
AbstractAn applicable Eluex process was developed for acid in situ leaching (ISL) uranium mine in Bayanwula. In this process, uranium was adsorbed with strong base anion resin from the pregnant solution, then the loaded resin was eluted by sulfuric acid, after Di-(2-ethylhexyl) phosphoric acid (D2EHPA) extraction, the concentrated eluate was enriched and the loaded organic phase was stripped by sodium carbonate, and the yellow cake was obtained by sodium hydroxide precipitation at last. The uranium concentration in loaded strip solution was 52.8  g L−1. Parameters of the process were determined, and the imp...
Source: Journal of Radioanalytical and Nuclear Chemistry - July 6, 2020 Category: Nuclear Medicine Source Type: research

Combined use of CaCl 2 roasting and nitric acid leaching for the removal of uranium and radioactivity from uranium tailings
AbstractCalcium chloride (CaCl2) roasting and nitric acid (HNO3) leaching were combined to remove uranium and radioactivity from uranium tailings. The results show that the uranium and gross α and β radioactivity removal efficiencies improve with increasing CaCl2 addition and HNO3 leaching time and reach maximum values of 81.5%, 87.9% and 86.5%, respectively, after roasting with 50% CaCl2 for 120  min, followed by 1 mol L−1 HNO3 leaching. The uranium leaching rate is 62.3% higher than with direct acid leaching. The mineralogical characteristics of the roasted clinker show that roasting urani...
Source: Journal of Radioanalytical and Nuclear Chemistry - July 6, 2020 Category: Nuclear Medicine Source Type: research

Uranium speciation and distribution in Shewanella putrefaciens and anaerobic granular sludge in the uranium immobilization process
AbstractThe uranium (U) inShewanella putrefaciens (S. putrefaciens) and anaerobic granular sludge (AnGS) were fractionated, and the contents and forms of U in each fraction were investigated. The functional groups of microorganisms for U binding and the deposition of U in microbial aggregates were also analyzed. Four main approaches were found involved in U immobilization, including biosorption/complexation by microbial cells and their extracellular polymeric substances (EPS), non-reductive biomineralization, bioreduction and intracellular accumulation. Results show that non-reductive biomineralization was found to be domi...
Source: Journal of Radioanalytical and Nuclear Chemistry - July 6, 2020 Category: Nuclear Medicine Source Type: research

Quantification of multielements for mobilization study in water and sediments of Satluj River and Harike Wetland using Inductively Coupled Plasma Mass Spectrometry and Instrumental Neutron Activation Analysis
AbstractThe study of Total Dissolved Solids (TDS) and concentration distribution of multielements including toxic elements in river –wetland ecosystem at different locations of Satluj River and Harike Wetland were carried out to understand the mobilization behavior of elements including toxic elements. The concentrations of multi-elements in water and sediments were determined using Inductively Coupled Plasma Mass Spectrometry (ICP-MS) and Instrumental Neutron Activation Analysis (INAA) utilizing reactor neutrons, respectively. The concentration values are found to be within permissible limit set by WHO and BIS. The ...
Source: Journal of Radioanalytical and Nuclear Chemistry - July 6, 2020 Category: Nuclear Medicine Source Type: research

Prompt gamma rays induced by inelastic scattering of fission neutrons on iron
AbstractPrompt gamma rays induced by (n,n ′γ) reactions on iron were measured with the instrument FanGaS (Fast Neutron induced Gamma-Ray Spectrometry) operated at the Heinz Maier-Leibnitz Zentrum (MLZ) in Garching. The measurement was performed at an angle of 90° between neutron beam and detector. The fast neutron flux at the sample pos ition was determined to be 1.40 × 108 cm−2 s−1 by using the foil activation method. Energies, relative intensities and fast neutron spectrum averaged isotopic cross section for production of 81 prompt gamma lines are presented. The r...
Source: Journal of Radioanalytical and Nuclear Chemistry - July 6, 2020 Category: Nuclear Medicine Source Type: research

Comparison of PGAA and wet chemical analysis for determining major element contents in eucritic meteorites
AbstractPrompt gamma-ray activation analysis (PGAA) was applied to well homogenized meteorite samples initially prepared for the wet chemical analysis. By comparing the PGAA data with wet chemical analysis data in literatures, it was confirmed that PGAA can be alternative or even advantageous to wet chemical analysis in terms of the data reliability. Because the same sample can be analyzed by INAA followed by PGAA, data obtained by a combination of PGAA and INAA were proved to enable us to discuss the detailed chemical characteristics of meteorite samples represented by eucritic meteorites (eucrites). (Source: Journal of R...
Source: Journal of Radioanalytical and Nuclear Chemistry - July 6, 2020 Category: Nuclear Medicine Source Type: research

Measurement of 14.54  ± 0.24 MeV neutron activation reaction cross sections of 93 Nb, nat Mo with covariance analysis
AbstractThe93Nb(n, α)90mY,93Nb(n,2n)92mNb and92Mo(n,p)92mNb reaction cross sections have been measured relative to the197Au(n,2n)196Au monitor reaction at the neutron energy of 14.54  ± 0.24 MeV. The neutrons were generated from the T(d,n)4He reaction using Purnima neutron generator. The experiment was done by using the method of activation in combination with an off-line\(\gamma\)-ray spectrometry technique. The uncertainties and correlations for the reaction cross sections were estimated with the use of covariance analysis by considering the partial uncertainties in individual attributes. The m...
Source: Journal of Radioanalytical and Nuclear Chemistry - July 6, 2020 Category: Nuclear Medicine Source Type: research

Isolation of resveratrol from peanut sprouts, radioiodination and investigation of its bioactivity on neuroblastoma cell lines
AbstractRecently, natural antioxidant substances have been purified in a significant increasing incline from different plants for diagnosis and treatment options. In the current study, Resveratrol (RES) was isolated and radioiodinated with iodine-131 ([131I]iodo-RES). Cell culture studies were conducted on neuroblastoma cells (SY-SH5Y and SK-N-AS) to investigate the bioavailability of [131I]iodo-RES. The radioiodination yield of RES was 98.81  ± 0.37% (n = 6). Uptake values up to 25% were observed notably on SK-N-AS cells until 24 h. Briefly; the current study will contribute to the ...
Source: Journal of Radioanalytical and Nuclear Chemistry - June 24, 2020 Category: Nuclear Medicine Source Type: research

Radon and thoron radiation exposure of the Angolan population living in adobe houses
This study investigates radon and thoron activity concentrations in adobe houses of Angola. Activity concentrations were recorded by passive detectors in rainy and dry seasons in 40 dwellings located at three areas with different climatic and geological backgrounds (Cabinda, Huambo, Menongue). Regarding seasonal and spatial variations, radon activity concentrations are higher in the rainy than in the dry season and both radon and thoron levels are the highest in Huambo, the central part of the country. The number of adobe houses above certain radon and thoron levels were estimated and the contribution of thoron to the inha...
Source: Journal of Radioanalytical and Nuclear Chemistry - June 24, 2020 Category: Nuclear Medicine Source Type: research

Synthesis of deuterium-labeled 1-(4-methoxybenzyl)-3-(5-nitrothiazol-2-yl)urea (AR-A014418) as an internal standard for LC –MS analysis
AbstractAR-A014418, 1-(4-methoxybenzyl)-3-(5-nitrothiazol-2-yl)urea is a potential drug with potent activities against cancer cell, nociceptive pain and neurodegenerative disorders. In this paper, the stable deuterium-labeled [2H3]AR-A014418 was synthesized in seven steps with 21% overall yield starting from the commercially available [2H4]methanol,p-hydroxybenzaldehyde and 2-amino-5-nitrothiazole. The chemical and isotope purity of the title compound were over 99% and 98%, respectively. This labeled [2H3]AR-A014418 can be used as an internal standard for LC –MS analysis in drug absorption, distribution and other pha...
Source: Journal of Radioanalytical and Nuclear Chemistry - June 24, 2020 Category: Nuclear Medicine Source Type: research

Elemental characterisation of native lichens collected in an area affected by traditional charcoal production
This study provides a seasonal elemental characterisation of native lichens collected in rural areas of Portugal affected by charcoal kilns, using nuclear analytical techniques and electric conductivity. In autumn, it was possible to identify high levels of electric conductivity near the site with charcoal kilns due to higher oxidative stress of the lichens ’ membrane. Typical chemical elements associated with emissions of wood burning, such as S and P, also presented the highest contents near the charcoal kilns. However, the same phenomenon was not found in spring. Residential areas presented the highest levels of S...
Source: Journal of Radioanalytical and Nuclear Chemistry - June 24, 2020 Category: Nuclear Medicine Source Type: research

Simultaneous measurements of radon, thoron and their progeny for inhalation dose assessment in indoors of Srinagar, J & amp;K, India
AbstractA variety of toxins are known to affect indoor air quality, thereby affecting the health of the inhabitants of that region. One such natural contaminant is radon, which is a dense, colourless, odourless and inert gas. As per BEIR-VI report (Chauhan and Chauhan in J Environ Radioact, 2015.https://doi.org/10.1016/j.jenvrad.2015.03.009), Radon alone contributes to more than 50% of the total natural background radiation and is the second leading element causing lung cancer after smoking. Therefore, its quantification is vital to assess any risk to human health. In order to assess health risks, a recently developed LR-1...
Source: Journal of Radioanalytical and Nuclear Chemistry - June 24, 2020 Category: Nuclear Medicine Source Type: research

A comparative study of the principal approaches for the estimation of measurement uncertainty for the ICP-OES determination of the light rare earth elements, yttrium and uranium in rock samples
AbstractMeasurement uncertainty (MU) associated with the determination of the light rare earth elements (La, Ce, Pr, Nd, Sm, Eu), yttrium and uranium in different types of rock samples by an ICP-OES method has been evaluated by the three principal approaches: the GUM modelling approach, the Nordtest single laboratory approach and the Horwitz equation. A within-laboratory validation data for specificity, linearity, range, accuracy and precision was used for the MU calculations. Procedures have been described for the MU calculations by the three approaches and MU results for an in-house rock sample by the three approaches ha...
Source: Journal of Radioanalytical and Nuclear Chemistry - June 24, 2020 Category: Nuclear Medicine Source Type: research

George Hevesy Medal Award 2020: an addendum
(Source: Journal of Radioanalytical and Nuclear Chemistry)
Source: Journal of Radioanalytical and Nuclear Chemistry - June 24, 2020 Category: Nuclear Medicine Source Type: research

Assessment of reactor-produced 199 Au as a promising theranostic radionuclide and subsequent separation from platinum target
AbstractFeasibility of199Au production  from neutron activated platinum and gold targets at the Egyptian Second Research Reactor was studied. A comparison between theoretical calculations and experimental measurements for the two targets was carried out. A radiochemical separation of199Au from irradiated Pt target was achieved using chromatographic column packed with modified chabazite material with elution efficiency of 90  ± 0.54% based on the high separation factor between Au and other produced undesired radionuclides. Three quality control tests; radionuclidic, radiochemical and chemical purit...
Source: Journal of Radioanalytical and Nuclear Chemistry - June 23, 2020 Category: Nuclear Medicine Source Type: research

Theoretical study on structures of Am(III) carbonate complexes
AbstractIn order to elucidate the coordination structure and bonding properties between Am(III) and carbonate ion (CO32 −), the geometric and electronic structures of the Am(III) carbonate complexes were systematically studied by scalar-relativistic density function theory. The bonding nature between Am atom and ligands was explored by the analyses of the natural bond orbital, quantum theory of atoms-in-molecules and electron localization function. These results indicate that the Am –Oc bonds are σ character with ionic interaction. Thermodynamic analysis shows that [Am(CO3)3(H2O)2]3 − was the most s...
Source: Journal of Radioanalytical and Nuclear Chemistry - June 23, 2020 Category: Nuclear Medicine Source Type: research

Assessment of natural radioactivity and radiation hazards owing to coal fly ash and natural pozzolan Portland cements
AbstractThe natural radioactivity in coal fly ash and natural pozzolan Portland cement samples produced in Spain was measured by gamma spectrometry. Activity concentrations of226Ra,232Th and40K ranged from 15.7 to 88.3  Bq kg−1, from 12.8 to 81.0  Bq kg−1 and from 37.0 to 678.0  Bq kg−1, respectively. The radiological hazards samples owing to the mentioned natural radioactivity were inferred from determinations of the activity concentration index,I, absorbed dose rate,Dext, and annual effective dose,Ep, which falls within 0.20  mSv to 0.87 mSv (coal-cement) and 0.18...
Source: Journal of Radioanalytical and Nuclear Chemistry - June 23, 2020 Category: Nuclear Medicine Source Type: research

Active moss biomonitoring technique for atmospheric elemental contamination in Hanoi using proton induced X-ray emission
AbstractFor the first time, the active moss biomonitoring technique has been used in Vietnam for investigation of atmospheric elemental contamination in the air of Hanoi region. TheSphagnum girgensohnii moss harvested in the clean area were used to produce the moss-bags. After 2 months of expose in 45 different sites in Hanoi area, the moss samples were prepared and the concentration of 27 heavy metal elements were determined by proton induced X-ray emission at Cyclotron Research Center of Iwate Medical University (Japan). The comparison of the obtained results with those in several cities in Europe shows that Hanoi &r...
Source: Journal of Radioanalytical and Nuclear Chemistry - June 23, 2020 Category: Nuclear Medicine Source Type: research

Chemical, physical and radiological evaluation of raw materials and geopolymers for building applications
AbstractThe main goal of this study was the evaluation of physical –chemical, as well as radiological properties of residual materials used for geopolymer synthesis and those final products as a possible application as new materials in a civil engineering industry. Concentration of40K and radionuclides from the238U and232Th decay series in waste precursors, their metaphases and geopolymer samples synthetized by alkali activation were determined together with corresponding absorbed dose rate (\(\dot{D}\)) and the annual effective dose rate. Natural activity concentrations in the alkali-activated material (geopolymer) ...
Source: Journal of Radioanalytical and Nuclear Chemistry - June 16, 2020 Category: Nuclear Medicine Source Type: research