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Sobhy A, El-Kelany M, Sadek Taher M, Bader HG. Possible use of food grade Isomalt material as an EPR dosimeter. RADIOCHIM ACTA 2021. [DOI: 10.1515/ract-2020-0059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The feasibility of using Isomalt “the food grade substance” as electron paramagnetic resonance (EPR) material in monitoring the absorbed dose has been studied. Isomalt was prepared in two forms (powder and rods). The sensitivity of Isomalt to gamma rays exceeded by increasing the absorbed dose. The prepared powder can be used in monitoring the absorbed dose in the dose range up to 22 kGy, whereas the rods can be used in the range from 5 to 50 kGy (almost double the allowed powder range). After irradiation two signals were recorded using the EPR technique addressed as S1 and S2 with (g) factor valued by 2.01 ± 0.002 and 1.993 ± 0.002 respectively. This dosimeter offers negligible humidity effect during irradiation, short and long term stabilities were investigated as well. The obtained results may qualify the Isomalt substance to be used as dose monitoring in low and moderate irradiation doses.
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Affiliation(s)
- Asmaa Sobhy
- Radiation Protection and Dosimetry Department , National Center for Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority (EAEA) , P.O Box 8029, Naser City , Cairo , Egypt
| | - Moshira El-Kelany
- Radiation Protection and Dosimetry Department , National Center for Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority (EAEA) , P.O Box 8029, Naser City , Cairo , Egypt
| | | | - Hasanat G. Bader
- Radiation Protection and Dosimetry Department , National Center for Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority (EAEA) , P.O Box 8029, Naser City , Cairo , Egypt
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Nakagawa K, Karakirova Y, Yordanov ND. Heavy-ion-induced sucrose radicals investigated using EPR and UV spectroscopy. JOURNAL OF RADIATION RESEARCH 2015; 56:405-412. [PMID: 25480828 PMCID: PMC4426910 DOI: 10.1093/jrr/rru108] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2014] [Revised: 10/07/2014] [Accepted: 10/18/2014] [Indexed: 06/04/2023]
Abstract
The potential use of a sucrose dosimeter for estimating both linear energy transfer (LET) and the absorbed dose of heavy ion and X-ray radiation was investigated. The stable free radicals were produced when sucrose was irradiated with heavy ions, such as helium, carbon, silicon and neon ions, and when the X-ray radiation was similar to the obtained electron paramagnetic resonance (EPR) spectra, which were ∼7 mT wide and composed of several hyperfine structures. In addition, the total spin concentration resulting from heavy-ion irradiation increased linearly as the absorbed dose increased, and decreased logarithmically as the LET increased. These empirical relations imply that the LET at a certain dose can be determined from the spin concentration. For sucrose and alanine, both cross-sections following C-ion irradiation with a 50 Gy dose were ∼1.3 × 10(-12) [μm(2)], taking into account the molecular size of the samples. The values of these cross-sections imply that multiple ionizing particles were involved in the production of stable radicals. Furthermore, UV absorbance at 267 nm of an aqueous solution of irradiated sucrose was found to linearly increase with increasing absorbed dose. Therefore, the EPR and UV results suggest that sucrose can be a useful dosimeter for heavy-ion irradiation.
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Affiliation(s)
- Kouichi Nakagawa
- Department of Radiological Life Sciences, Graduate School of Health Sciences, Hirosaki University, 66-1 Hon-cho, Hirosaki, 036-8564, Japan
| | - Yordanka Karakirova
- National EPR Center, Institute of Catalysis, Bulgaria Academy of Sciences, Sofia, Bulgaria
| | - Nicola D Yordanov
- National EPR Center, Institute of Catalysis, Bulgaria Academy of Sciences, Sofia, Bulgaria
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Sucrose as a dosimetric material for photon and heavy particle radiation: A review. Radiat Phys Chem Oxf Engl 1993 2015. [DOI: 10.1016/j.radphyschem.2015.01.014] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Nakagawa K, Kobukai K, Sato Y. ESR investigation of sucrose radicals produced by 0.25-4.5 Gy doses of X-ray irradiation. JOURNAL OF RADIATION RESEARCH 2014; 55:726-729. [PMID: 24672022 PMCID: PMC4100009 DOI: 10.1093/jrr/rru018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/07/2013] [Revised: 02/27/2014] [Accepted: 02/28/2014] [Indexed: 06/03/2023]
Abstract
We investigated stable radicals produced by 0.25-4.5 Gy doses of X-ray irradiation of sucrose. Electron spin resonance (ESR) is able to observe the signal from sucrose irradiated at 0.25 Gy. The ESR signal intensity of the radicals is related to the accumulated dose, and it increases linearly with increasing absorbed dose. In addition, we examined the effect of dose rate (0.50-1.5 Gy/min) on the signal intensity of the irradiated sucrose. The stable radical production did not exhibit dose rate dependence. In addition, the peak corresponding to the irradiated glucose was observed to increase more with increasing absorbed dose than the peak corresponding to irradiated fructose. Therefore, the present ESR results regarding the 0.25-4.5 Gy irradiation of sucrose provide new insights into a possible sucrose ESR dosimeter.
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Affiliation(s)
- Kouichi Nakagawa
- Department of Radiological Life Sciences, Graduate School of Health Sciences, Hirosaki University, 66-1 Hon-cyo, Hirosaki, 036-8564, Japan
| | - Ken Kobukai
- Department of Health Sciences, Hirosaki University, 66-1 Hon-cyo, Hirosaki, 036-8564, Japan
| | - Yuzuru Sato
- Department of Health Sciences, Hirosaki University, 66-1 Hon-cyo, Hirosaki, 036-8564, Japan
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Nakagawa K. Effects of low-dose X-ray irradiation of eggshells on radical production. Free Radic Res 2014; 48:679-83. [DOI: 10.3109/10715762.2014.900174] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- K. Nakagawa
- Department of Radiological Life Sciences, Graduate School of Health Sciences, Hirosaki University,
Hirosaki, Japan
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Amraei R, Kheirkhah M, Raisali G. Lactose and sucrose aqueous solutions for high-dose dosimetry with 10-MeV electron beam irradiation. RADIATION PROTECTION DOSIMETRY 2012; 149:357-362. [PMID: 21765157 DOI: 10.1093/rpd/ncr309] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
In the present study, dosimetric characterisation of aqueous solutions of lactose and sucrose was analysed by UV spectrometry following irradiation using 10-MeV electron beam at doses between 0.5 and 10.5 kGy. As a dosimetric index, absorbance is selected at 256 and 264 nm for lactose and sucrose aqueous solutions, respectively. The intensity of absorbance for irradiated solutions depends on the pre-irradiation concentration of lactose and sucrose. The post-irradiation stability of both solutions was investigated at room temperature for a measurement period of 22 d.
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Affiliation(s)
- Reza Amraei
- Radiation Applications Research School, Nuclear Science and Technology Research Institute, Yazd, Iran.
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Karakirova Y, Yordanov ND. EPR and UV spectrometry investigation of sucrose irradiated with carbon particles. RADIAT MEAS 2010. [DOI: 10.1016/j.radmeas.2010.03.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Karakirova Y, Yordanov N, De Cooman H, Vrielinck H, Callens F. Dosimetric characteristics of different types of saccharides: An EPR and UV spectrometric study. Radiat Phys Chem Oxf Engl 1993 2010. [DOI: 10.1016/j.radphyschem.2009.12.003] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Karakirova Y, Lund E, Yordanov ND. EPR and UV investigation of sucrose irradiated with nitrogen ions and gamma-rays. RADIAT MEAS 2008. [DOI: 10.1016/j.radmeas.2007.10.048] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Nakagawa K, Ikota N, Anzai K. Sucrose radical-production cross-section regarding heavy-ion irradiation. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2008; 69:1384-1387. [PMID: 18006374 DOI: 10.1016/j.saa.2007.09.041] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2007] [Accepted: 09/17/2007] [Indexed: 05/25/2023]
Abstract
We investigated the sucrose radical-production cross-section induced by heavy-ion irradiation. L-alanine was also used in order to compare radical yield and cross-section. The stable free radicals after irradiation were analyzed by electron paramagnetic resonance (EPR). The radical yield obtained by the irradiated samples had a logarithmic correlation with the LET (linear energy transfer). Quantitative EPR analyses showed that radical productions for sucrose and L-alanine vary both by different particle irradiation and the LET under the same absorbed dose. Furthermore, the cross-sections of radical productions for samples were calculated. Both cross-sections for C ions irradiation under LET 30 keV/microm at 50 Gy dose were approximately 3.0x10(-9) microm(2), taking account of the molecular areas of the samples. The values of the cross-sections imply that multiple ionizing particles involve producing stable radicals.
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Affiliation(s)
- Kouichi Nakagawa
- RI Research Center, Fukushima Medical University, 1 Hikarigaoka, Fukushima 960-1295, Japan.
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Rakvin B, Maltar-Strmečki N, Nakagawa K. Pulsed EPR study of low-dose irradiation effects in L-alanine crystals irradiated with -rays, Ne and Si ion beams. RADIAT MEAS 2007. [DOI: 10.1016/j.radmeas.2007.06.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Pauwels E, Van Speybroeck V, Waroquier M. Radiation-induced radicals in alpha-D-glucose: Comparing DFT cluster calculations with magnetic resonance experiments. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2006; 63:795-801. [PMID: 16488658 DOI: 10.1016/j.saa.2005.10.027] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2005] [Revised: 09/23/2005] [Accepted: 10/01/2005] [Indexed: 05/06/2023]
Abstract
Using density functional theory (DFT) calculations, an enhanced theoretical examination was made of the radiation-induced radicals in alpha-d-glucose. For the carbon-centred radicals in this sugar, the effect of the model space on the radical geometry as well as on the calculated radical hyperfine coupling tensors was examined. The findings were compared with previously published tensors, as determined by electron paramagnetic resonance (EPR) experiments and single molecule DFT calculations. A cluster approach was adopted, in which intermolecular interactions (predominantly hydrogen bonds) between the radical species and its environment were explicitly incorporated. This substantially improved the correspondence with experimental findings in comparison with single molecule calculations of an earlier examination. In a direct comparison between both computational methods for the glucose radicals, it was shown that the extent of the model space plays an important part in the determination of the radical geometry. Furthermore, the model space also has an impact on the calculated hyperfine coupling tensors. Full cluster EPR calculations, in which the paramagnetic properties are calculated for the entire model space of the cluster, give an excellent agreement with the experimental EPR measurements.
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Affiliation(s)
- Ewald Pauwels
- Center for Molecular Modeling, Ghent University, Proeftuinstraat 86, B-9000 Gent, Belgium.
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Malinen E, Waldeland E, Hole EO, Sagstuen E. LET effects following neutron irradiation of lithium formate EPR dosimeters. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2006; 63:861-9. [PMID: 16495132 DOI: 10.1016/j.saa.2005.10.017] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2005] [Revised: 09/23/2005] [Accepted: 10/01/2005] [Indexed: 05/06/2023]
Abstract
Lithium formate electron paramagnetic resonance (EPR) dosimeters were irradiated using 60Co gamma-rays or fast neutrons to doses ranging from 5 to 20 Gy and investigated by EPR spectroscopy. Using a polynomial fitting procedure in order to accurately analyze peak-to-peak line widths of first derivative EPR spectra, dosimeters irradiated with neutrons had on average 4.4+/-0.9% broader EPR resonance lines than gamma-irradiated dosimeters. The increase in line width was slightly asymmetrical. Computer simulated first derivative polycrystalline EPR spectra of a *CO2- radical gave very good reconstructions of experimental spectra of irradiated dosimeters. The spectrum simulations could then be used as a tool to investigate the line broadening observed following neutron irradiation. It was shown that an increase in the simulated Lorentzian line width could explain both the observed line broadening and the asymmetrical effect. The ratio of the peak-to-peak amplitude of first derivative EPR spectra obtained at two different microwave powers (20 and 0.5 mW) was 7.8+/-1.2% higher for dosimeters irradiated with neutrons. The dependence of the spectrum amplitude on the microwave power was extensively investigated by fitting observations to an analytical non-linear model incorporating, among others, the spin-lattice (T1) and spin-spin (T2) relaxation times as fitting parameters. Neutron irradiation resulted in a reduction in T(2) in comparison with gamma-irradiation, while a smaller difference in T1 was found. The effects observed indicate increased local radical density following irradiation using high linear energy transfer (LET) neutrons as compared to low LET gamma-irradiation. A fingerprint of the LET may thus be found either by an analysis of the line width or of the dependence of the spectrum amplitude on the microwave power. Lithium formate is therefore a promising material for EPR dosimetry of high LET radiation.
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Affiliation(s)
- Eirik Malinen
- Department of Physics, University of Oslo, P.O. Box 1048 Blindern, N-0316 Oslo, Norway.
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Nakagawa K, Sato Y. Analyses of the EPR responses of sucrose and L-alpha-alanine radicals induced by C, Ne, and Ar ion irradiations. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2006; 63:851-4. [PMID: 16490388 DOI: 10.1016/j.saa.2005.10.015] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2005] [Revised: 09/23/2005] [Accepted: 10/01/2005] [Indexed: 05/06/2023]
Abstract
Using electron paramagnetic resonance (EPR), we investigated the signal responses of sucrose and L-alpha-alanine radicals produced by heavy-ion irradiation with various linear energy transfers (LETs) and absorbed dose. The spin yields for the two compounds showed a linear relation with the absorbed dose, as well as a logarithmic correlation with the LET. A quantitative EPR analysis showed that sucrose was more sensitive to the particle species than that of alanine. Hence, the present EPR results imply that sucrose can be useful as a radiation indicator. Further analysis was carried out for the radical-production cross section, which showed that stable radicals of the two compounds were produced through collisions of several particles with a single molecule.
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Affiliation(s)
- Kouichi Nakagawa
- RI Research Center, Fukushima Medical University, 1 Hikarigaoka, Fukushima 960-1295, Japan.
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Nakagawa K, Sato Y. Investigation of Heavy-Ion-Induced Sucrose Radicals by Electron Paramagnetic Resonance. Radiat Res 2005; 164:336-8. [PMID: 16137208 DOI: 10.1667/rr3429.1] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The production of sucrose radicals with heavy-ion irradiation was investigated by an EPR (electron paramagnetic resonance) spectroscopic method. We examined the correlation between the production of sucrose radicals and the ion species, as well as LET (linear energy transfer). The spectral pattern obtained was the same for various ion species, including helium, carbon, neon, argon and iron ions. Quantitative EPR analyses showed that the production of sucrose radicals depended on both the ion species and the LET for the same dose of 50 Gy. The spin yield obtained showed a logarithmic correlation with the LET. In addition, the EPR response had a linear relationship with dose in the dose range of 5-60 Gy. Thus the present EPR results show that sucrose can be used to monitor the ionizing particle based on the radical yield.
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Affiliation(s)
- Kouichi Nakagawa
- RI Research Center, Fukushima Medical University, 1 Hikarigaoka, Fukushima, 960-1295, Japan.
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Nakagawa K, Sato Y. ESR investigation of sucrose radicals produced by particle irradiation. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2004; 60:1315-1318. [PMID: 15134729 DOI: 10.1016/j.saa.2003.10.028] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2003] [Revised: 09/29/2003] [Accepted: 10/17/2003] [Indexed: 05/24/2023]
Abstract
We investigated sucrose radicals produced by heavy-ion irradiation with various linear energy transfer (LETs) and the possibility for a sucrose electron spin resonance (ESR) dosimeter. The impact of heavy ions on sucrose produced sucrose radicals, which were measured by ESR. The obtained spectral pattern was the same as that for helium (He) ions, carbon (C) ions, neon (Ne) ions, iron (Fe) ions, and gamma-ray irradiation. Identical spectra were measured after 1 year, but the initial intensities decreased by a few percent when the samples were kept in ESR tubes with the caps at ambient temperature. The total spin concentration obtained by heavy-ion irradiation had a linear relation with the absorbed dose, and correlated logarithmically with the LET. Qualitative ESR analyses showed that the production of sucrose radicals depended on both the particle identity and the LET at the same dose. The production of spin concentration by He ions was the most sensitive to LET. Empirical relations between the LET and the spin yield for various particles imply that the LET at a certain dose can be estimated by the spin concentration. Therefore, the present ESR results imply that sucrose can be used to monitor the absorbed dose and the LET of particle irradiation.
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Affiliation(s)
- Kouichi Nakagawa
- RI Research Center, Fukushima Medical University, 1 Hikarigaoka, Fukushima, 960-1295, Japan.
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Shukla LI, Natarajan V, Devasagayam TP, Sastry MD, Kesavan PC. EPR studies on gamma-irradiated barley seeds: identification of trapped electrons. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2001; 49:5273-5278. [PMID: 11714316 DOI: 10.1021/jf0105743] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Electron paramagnetic resonance (EPR) studies were conducted on barley seeds exposed to normal (H(2)O) and deuterated (D(2)O) moisture, irradiated with 750 Gy at 77 K. Reported here, for the first time, are the trapped electrons formed on gamma-irradiation of seeds at 77 K. Electrons are stabilized/solvated with an increase in the moisture content (H(2)O/D(2)O) of seeds. The recombination of the trapped electron with radical cation gave intense thermoluminescence emission at 110 K. With the increase in temperature and the destruction of singlet, unmasking of an underlying heterogeneous population of free radicals was observed. These free radicals emanate mainly from the endosperm (approximately 95% by wt of the seed), whereas irradiated embryos show a broad multiplet of comparatively low amplitude. Radiolysis of carbohydrate, proteins (approximately 95% of endosperm), and lipids could possibly be responsible for the heterogeneous population of free radicals. Peroxyl radicals were also observed on annealing.
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Affiliation(s)
- L I Shukla
- School of Life Sciences, Jawaharlal Nehru University, New Delhi 110 067, India.
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