Abstract K X-ray fluorescence cross-sections were experimentally determined for elements in the range 22 ≤ Z ≤ 29 at various energies using secondary excitation method. K X-rays emitted by samples were counted by a Si(Li) detector with resolution 160 eV at 5.9 keV. Obtained values were compared with the calculated values. The experimental values are systematically higher than the theoretical values.
{"title":"Variation of K X-Ray Fluorescence Cross-Sections for Elements in the Range 22 ≤ Z ≤ 29 at Various Energies","authors":"E. Baydaş, Y. Sahin, E. Büyükkasap","doi":"10.1081/TMA-120023060","DOIUrl":"https://doi.org/10.1081/TMA-120023060","url":null,"abstract":"Abstract K X-ray fluorescence cross-sections were experimentally determined for elements in the range 22 ≤ Z ≤ 29 at various energies using secondary excitation method. K X-rays emitted by samples were counted by a Si(Li) detector with resolution 160 eV at 5.9 keV. Obtained values were compared with the calculated values. The experimental values are systematically higher than the theoretical values.","PeriodicalId":17525,"journal":{"name":"Journal of Trace and Microprobe Techniques","volume":"67 1","pages":"433 - 442"},"PeriodicalIF":0.0,"publicationDate":"2003-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79435949","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}
L. Simonot, A. Zobelli, M. Elias, J. Salomon, J. Dran
Abstract Painting glazes, which are coloured translucent layers used in oil paintings, show evidence of pigment migration upon examination of cross sections with optical microscope and scanning electron microscope (SEM). The present work deals with the use of two complementary accelerator-based analytical techniques, Particle Induced X-ray Emission (PIXE) and Rutherford Back-scattering Spectrometry (RBS), to tentatively reveal such a phenomenon in a non destructive way on experimental glazes. These glazes were prepared by successive addition of layers of emerald green pigment dispersed in a linseed oil medium and having the same pigment content. They were then analysed by PIXE and RBS to provide respectively the bulk elemental composition and the depth distribution on the same spot. It is shown that the pigment concentration at the surface increases with the number of layers up to a saturation value, thus revealing the pigment migration toward the surface.
{"title":"Microscopic Observations and Ion Beam Analyses of Pigment Distribution in Painting Glazes","authors":"L. Simonot, A. Zobelli, M. Elias, J. Salomon, J. Dran","doi":"10.1081/TMA-120017890","DOIUrl":"https://doi.org/10.1081/TMA-120017890","url":null,"abstract":"Abstract Painting glazes, which are coloured translucent layers used in oil paintings, show evidence of pigment migration upon examination of cross sections with optical microscope and scanning electron microscope (SEM). The present work deals with the use of two complementary accelerator-based analytical techniques, Particle Induced X-ray Emission (PIXE) and Rutherford Back-scattering Spectrometry (RBS), to tentatively reveal such a phenomenon in a non destructive way on experimental glazes. These glazes were prepared by successive addition of layers of emerald green pigment dispersed in a linseed oil medium and having the same pigment content. They were then analysed by PIXE and RBS to provide respectively the bulk elemental composition and the depth distribution on the same spot. It is shown that the pigment concentration at the surface increases with the number of layers up to a saturation value, thus revealing the pigment migration toward the surface.","PeriodicalId":17525,"journal":{"name":"Journal of Trace and Microprobe Techniques","volume":"8 1","pages":"35 - 48"},"PeriodicalIF":0.0,"publicationDate":"2003-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88626675","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}
Abstract A flow-injection (FI) method for the determination of catecholamines (epinephrine, dopamine, and l-dopa) has been developed. The method is based on the indirect biamperometric detection of the drugs by using I3 −/I− as an indicating redox system and flow-through detector with two polarized platinum wire electrodes. Catecholamines are oxidized in the sample loop by potassium permanganate and then the solution containing excess of oxidant is injected to the carrier stream, which merged with acidic solution of potassium iodide. The triiodide formed in reaction coil is detected biamperometrically. The detection limits are: 0.2 µg/mL for dopamine, 0.3 µg/mL for l-dopa, and 0.4 µg/mL for epinephrine. The calibration graphs are linear up to 40 µg/mL of catecholamines. The relative standard deviations are lower than 1.5%. The proposed method has been applied to determine catecholamines in commercially available pharmaceutical formulations.
{"title":"Indirect Flow-Injection Determination of Catecholamines with Biamperometric Detection","authors":"Elżbieta Wołyniec, A. Kojło","doi":"10.1081/TMA-120020256","DOIUrl":"https://doi.org/10.1081/TMA-120020256","url":null,"abstract":"Abstract A flow-injection (FI) method for the determination of catecholamines (epinephrine, dopamine, and l-dopa) has been developed. The method is based on the indirect biamperometric detection of the drugs by using I3 −/I− as an indicating redox system and flow-through detector with two polarized platinum wire electrodes. Catecholamines are oxidized in the sample loop by potassium permanganate and then the solution containing excess of oxidant is injected to the carrier stream, which merged with acidic solution of potassium iodide. The triiodide formed in reaction coil is detected biamperometrically. The detection limits are: 0.2 µg/mL for dopamine, 0.3 µg/mL for l-dopa, and 0.4 µg/mL for epinephrine. The calibration graphs are linear up to 40 µg/mL of catecholamines. The relative standard deviations are lower than 1.5%. The proposed method has been applied to determine catecholamines in commercially available pharmaceutical formulations.","PeriodicalId":17525,"journal":{"name":"Journal of Trace and Microprobe Techniques","volume":"17 1","pages":"217 - 227"},"PeriodicalIF":0.0,"publicationDate":"2003-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76846776","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}
Abstract Radioisotope X-ray fluorescence spectrometry has been applied for multi-elemental analysis of bentonite clay in Syria (Aleppo belouneh). Samples were taken at different times directly from different stores at the market, and then irradiated, after preparation, with a 109Cd isotope source. The following elements: Ca, Ti, Cr, Mn, Fe, Ni, Cu, Zn, As, Rb, Sr, Y, Zr, Nb, and Pb were determined. The health implications of some elements are discussed, since some pregnant women in Syria consume the substance in the first semester of pregnancy, during the morning sickness (craving). Some elements seem to pose health hazard such as Pb and Fe, which are present in the range of (DL > to about 23.1 µg/g) and (4.06 to 5.2%) respectively.
{"title":"Determination of Trace Elements in Syrian Bentonite Clay Using X-Ray Fluorescence Technique and Discussion on the Health Implication on Pregnant Women","authors":"E. Bakraji, J. Karajou","doi":"10.1081/TMA-120020274","DOIUrl":"https://doi.org/10.1081/TMA-120020274","url":null,"abstract":"Abstract Radioisotope X-ray fluorescence spectrometry has been applied for multi-elemental analysis of bentonite clay in Syria (Aleppo belouneh). Samples were taken at different times directly from different stores at the market, and then irradiated, after preparation, with a 109Cd isotope source. The following elements: Ca, Ti, Cr, Mn, Fe, Ni, Cu, Zn, As, Rb, Sr, Y, Zr, Nb, and Pb were determined. The health implications of some elements are discussed, since some pregnant women in Syria consume the substance in the first semester of pregnancy, during the morning sickness (craving). Some elements seem to pose health hazard such as Pb and Fe, which are present in the range of (DL > to about 23.1 µg/g) and (4.06 to 5.2%) respectively.","PeriodicalId":17525,"journal":{"name":"Journal of Trace and Microprobe Techniques","volume":"24 1","pages":"397 - 405"},"PeriodicalIF":0.0,"publicationDate":"2003-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89414950","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}
S. Jonah, I. Williams, B. Nyarko, E. Akaho, Y. Serfor-Armah
Abstract Instrumental neutron activation analysis technique with thermal and epithermal neutrons from a 30 kW research reactor has been used to determine the concentration of some essential elements in market infant foods. The elements Ca, Cl, Fe, Mn, Mg, K, Na, V, Zn, Br, and I were found in various proportions in four infant foods widely sold in Nigeria. A comparison of the measured results and producer's quoted values indicates that the adopted experimental procedure can be used routinely for control and monitoring purposes.
{"title":"Routine Monitoring of Market Infant Foods by Neutron Activation Analysis with a Low-Power Reactor","authors":"S. Jonah, I. Williams, B. Nyarko, E. Akaho, Y. Serfor-Armah","doi":"10.1081/TMA-120020275","DOIUrl":"https://doi.org/10.1081/TMA-120020275","url":null,"abstract":"Abstract Instrumental neutron activation analysis technique with thermal and epithermal neutrons from a 30 kW research reactor has been used to determine the concentration of some essential elements in market infant foods. The elements Ca, Cl, Fe, Mn, Mg, K, Na, V, Zn, Br, and I were found in various proportions in four infant foods widely sold in Nigeria. A comparison of the measured results and producer's quoted values indicates that the adopted experimental procedure can be used routinely for control and monitoring purposes.","PeriodicalId":17525,"journal":{"name":"Journal of Trace and Microprobe Techniques","volume":"12 1","pages":"407 - 413"},"PeriodicalIF":0.0,"publicationDate":"2003-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74261491","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}
V. Oreščanin, K. Durgo, J. Franekić-Čolić, K. Nad, V. Valković
Abstract The physical, chemical and genotoxic properties of the activated red mud and its waste mud remained after waste water treatment were studied. The sequential leaching of waste mud under different conditions was investigated, as well as the toxic effect of its water extract, in order to discover a safe way for the handling and disposal of this waste material. Furthermore, in order to reduce the amount of waste material, the possibility of its regeneration and re-usage was also studied. Heavy metals content and other parameters, as well as the genotoxicity of water extract of new coagulant produced for industrial waste water treatment, were investigated to confirm its non-toxicity before its commercial production and usage. For the toxicity investigation, two strains of Salmonella typhimurium, TA98 and TA100 were used as a test system. Tested samples were not cytotoxic or mutagenic for S. typhimurium TA98/TA100 in the presence/absence of the metabolic activation. Promising results were also obtained in the field of waste mud regeneration and re-usage.
{"title":"Physical, Chemical, and Genotoxic Properties of Waste Mud By-product of Waste Water Treatment","authors":"V. Oreščanin, K. Durgo, J. Franekić-Čolić, K. Nad, V. Valković","doi":"10.1081/TMA-120017903","DOIUrl":"https://doi.org/10.1081/TMA-120017903","url":null,"abstract":"Abstract The physical, chemical and genotoxic properties of the activated red mud and its waste mud remained after waste water treatment were studied. The sequential leaching of waste mud under different conditions was investigated, as well as the toxic effect of its water extract, in order to discover a safe way for the handling and disposal of this waste material. Furthermore, in order to reduce the amount of waste material, the possibility of its regeneration and re-usage was also studied. Heavy metals content and other parameters, as well as the genotoxicity of water extract of new coagulant produced for industrial waste water treatment, were investigated to confirm its non-toxicity before its commercial production and usage. For the toxicity investigation, two strains of Salmonella typhimurium, TA98 and TA100 were used as a test system. Tested samples were not cytotoxic or mutagenic for S. typhimurium TA98/TA100 in the presence/absence of the metabolic activation. Promising results were also obtained in the field of waste mud regeneration and re-usage.","PeriodicalId":17525,"journal":{"name":"Journal of Trace and Microprobe Techniques","volume":"139 1","pages":"123 - 132"},"PeriodicalIF":0.0,"publicationDate":"2003-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83422239","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}
ABSTRACT The k-standardisation method for Instrumental Neutron Activation Analysis (INAA) was used in spectral evaluations of (n, γ) reactions on sediment samples of effluents discharged into the Kaduna River Basin environment in Nigeria. Twenty-two elements (As, Ba, Ce, Co, Cr, Cs, Eu, Fe, Hf, K, La, Lu, Na, Nd, Th, U, Rb, Sb, Sc, Ta, Tb, Zn) were identified. Sediments from industrial effluents showed stable element concentration levels with low variation coefficients, which is suggestive of controlled release and appropriate industrial management. However, some industrial sediments had high background loading factors of 3.6, 2.45, and 2.28, for heavy metals such as Zn, Cr, Co respectively.
{"title":"TRACE ELEMENTS FROM EFFLUENTS DISCHARGED INTO THE KADUNA RIVER BASIN ENVIRONMENT","authors":"I. Ewa, S. Ebele, I. M. Umar, Z. Molnár","doi":"10.1081/TMA-120006684","DOIUrl":"https://doi.org/10.1081/TMA-120006684","url":null,"abstract":"ABSTRACT The k-standardisation method for Instrumental Neutron Activation Analysis (INAA) was used in spectral evaluations of (n, γ) reactions on sediment samples of effluents discharged into the Kaduna River Basin environment in Nigeria. Twenty-two elements (As, Ba, Ce, Co, Cr, Cs, Eu, Fe, Hf, K, La, Lu, Na, Nd, Th, U, Rb, Sb, Sc, Ta, Tb, Zn) were identified. Sediments from industrial effluents showed stable element concentration levels with low variation coefficients, which is suggestive of controlled release and appropriate industrial management. However, some industrial sediments had high background loading factors of 3.6, 2.45, and 2.28, for heavy metals such as Zn, Cr, Co respectively.","PeriodicalId":17525,"journal":{"name":"Journal of Trace and Microprobe Techniques","volume":"41 1","pages":"385 - 393"},"PeriodicalIF":0.0,"publicationDate":"2002-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75569995","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}
D. V. Rao, T. Takeda, Y. Itai, T. Akatsuka, R. Cesareo, A. Brunetti, G. Gigante
ABSTRACT Compton and Rayleigh scattering cross sections for bone, bakelite, polycarbonate, nylon, lucite, polystyrene, polyethylene, water, glycogen, fat, calcium hydroxyapatite and protein are calculated for various monoenergetic Kα X-ray energies covering the angular region from 0 to 180° using non-relativistic, relativistic, relativistic modified and molecular form factors and the non-relativistic incoherent scattering function. The scattered radiation from these materials will be very useful to develop a semianalytic model to investigate the potential applications of X-ray scatter imaging. The scatter model can be used as a tool for designing and optimizing X-ray imaging system. However, one particular area of interest is in Monte Carlo simulation of photon transport in applications to medical physics and radiography.
{"title":"X-RAY SCATTERING CROSS SECTIONS FOR MOLECULES, PLASTICS, TISSUES, AND FEW BIOLOGICAL MATERIALS","authors":"D. V. Rao, T. Takeda, Y. Itai, T. Akatsuka, R. Cesareo, A. Brunetti, G. Gigante","doi":"10.1081/TMA-120006681","DOIUrl":"https://doi.org/10.1081/TMA-120006681","url":null,"abstract":"ABSTRACT Compton and Rayleigh scattering cross sections for bone, bakelite, polycarbonate, nylon, lucite, polystyrene, polyethylene, water, glycogen, fat, calcium hydroxyapatite and protein are calculated for various monoenergetic Kα X-ray energies covering the angular region from 0 to 180° using non-relativistic, relativistic, relativistic modified and molecular form factors and the non-relativistic incoherent scattering function. The scattered radiation from these materials will be very useful to develop a semianalytic model to investigate the potential applications of X-ray scatter imaging. The scatter model can be used as a tool for designing and optimizing X-ray imaging system. However, one particular area of interest is in Monte Carlo simulation of photon transport in applications to medical physics and radiography.","PeriodicalId":17525,"journal":{"name":"Journal of Trace and Microprobe Techniques","volume":"18 1","pages":"327 - 361"},"PeriodicalIF":0.0,"publicationDate":"2002-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74019621","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}
ABSTRACT Two methods for the determination of chlorprothixene hydrochloride are presented. One of them employs the liability of the chlorprothixene tertiary amine group nitrogen atom to form ion-association complexes with organic compounds. The formed complex is insoluble in water but well soluble in organic solvents. This property is the base of a new extractive-spectrophotometric method for chlorprothixene determination. The second method applied the oxidation reaction of chlorprothixene by Ce(IV) ions. Chlorprothixene hydrochloride is oxidised by ceric(IV) ions at room temperature with the formation of colourless products. Both reactions were followed spectrophotometrically by measuring the absorbance at 445 nm (extractive method) and at 268 nm (oxidative method). Extractive-spectrophotometric method allows to determine chlorprothixene hydrochloride in the range of 3.5–32.0 µg/mL. The oxidative method obeys Beer's law in the range of 3.2–21.0 µg/mL. The methods were successfully applied to the determination of chlorprothixene in pharmaceutical solutions. The results are in good agreement with those obtained by the official procedure.
{"title":"SPECTROPHOTOMETRIC DETERMINATION OF CHLORPROTHIXENE HYDROCHLORIDE BY PYROCATECHOL VIOLET AND CERIC(IV) IONS","authors":"B. Starczewska, J. Karpińska","doi":"10.1081/TMA-120006680","DOIUrl":"https://doi.org/10.1081/TMA-120006680","url":null,"abstract":"ABSTRACT Two methods for the determination of chlorprothixene hydrochloride are presented. One of them employs the liability of the chlorprothixene tertiary amine group nitrogen atom to form ion-association complexes with organic compounds. The formed complex is insoluble in water but well soluble in organic solvents. This property is the base of a new extractive-spectrophotometric method for chlorprothixene determination. The second method applied the oxidation reaction of chlorprothixene by Ce(IV) ions. Chlorprothixene hydrochloride is oxidised by ceric(IV) ions at room temperature with the formation of colourless products. Both reactions were followed spectrophotometrically by measuring the absorbance at 445 nm (extractive method) and at 268 nm (oxidative method). Extractive-spectrophotometric method allows to determine chlorprothixene hydrochloride in the range of 3.5–32.0 µg/mL. The oxidative method obeys Beer's law in the range of 3.2–21.0 µg/mL. The methods were successfully applied to the determination of chlorprothixene in pharmaceutical solutions. The results are in good agreement with those obtained by the official procedure.","PeriodicalId":17525,"journal":{"name":"Journal of Trace and Microprobe Techniques","volume":"2015 1","pages":"317 - 325"},"PeriodicalIF":0.0,"publicationDate":"2002-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86848220","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}
W. Misiuk, H. Puzanowska‐Tarasiewicz, L. Kuźmicka, K. Mielech
ABSTRACT Promazine hydrochloride (PMH) reacts in acidic medium with K2Cr2O7 forming coloured oxidation product. This property is exploited for using PMH as redox indicator in chromatometry. The spectra of oxidation products of PMH in UV and IR regions were recorded. The optimal conditions for the formation of these products and their electrochemical behaviour are described. K2Cr2O7 precipitates PMH from aqueous solutions as ion-association compound. The compound is sparingly soluble in water but can be quantitatively extracted into ethyl acetate. The extraction constant of this compound is determined and the extractive spectrophotometric method for the determination of PMH in pharmaceuticals is elaborated.
{"title":"APPLICATION OF THE REACTION OF PROMAZINE HYDROCHLORIDE WITH CHROMIUM(VI) IN VOLUMETRIC AND SPECTROPHOTOMETRIC ANALYSIS","authors":"W. Misiuk, H. Puzanowska‐Tarasiewicz, L. Kuźmicka, K. Mielech","doi":"10.1081/TMA-120006677","DOIUrl":"https://doi.org/10.1081/TMA-120006677","url":null,"abstract":"ABSTRACT Promazine hydrochloride (PMH) reacts in acidic medium with K2Cr2O7 forming coloured oxidation product. This property is exploited for using PMH as redox indicator in chromatometry. The spectra of oxidation products of PMH in UV and IR regions were recorded. The optimal conditions for the formation of these products and their electrochemical behaviour are described. K2Cr2O7 precipitates PMH from aqueous solutions as ion-association compound. The compound is sparingly soluble in water but can be quantitatively extracted into ethyl acetate. The extraction constant of this compound is determined and the extractive spectrophotometric method for the determination of PMH in pharmaceuticals is elaborated.","PeriodicalId":17525,"journal":{"name":"Journal of Trace and Microprobe Techniques","volume":"31 1","pages":"305 - 316"},"PeriodicalIF":0.0,"publicationDate":"2002-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89917571","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}
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