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Vazirov R, Narkhova A, Vazirova E, Sokovnin SY. Electron paramagnetic resonance signal in wheat seeds irradiated with low-energy electron beam. Radiat Phys Chem Oxf Engl 1993 2023. [DOI: 10.1016/j.radphyschem.2023.110934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/30/2023]
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Bani-Ahmad MM, Noor Azman NZ, Jasmine JNZ, Almarri HM, Alshipli M, Ramzun MR. Radiation attenuation ability of bentonite clay enriched with eggshell as recyclable waste for a physical rradiation barrier. Radiat Phys Chem Oxf Engl 1993 2022. [DOI: 10.1016/j.radphyschem.2022.110484] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Paksu U, Engin B. Electron spin resonance (ESR) study on gamma irradiated some modern paper samples. RADIAT MEAS 2022. [DOI: 10.1016/j.radmeas.2022.106849] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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Vazirov R, Sokovnin SY, Agdantseva E, Tsmokalyuk A. Investigation of radiation-induced electron paramagnetic resonance signal of an eggshell after electron beam irradiation. Radiat Phys Chem Oxf Engl 1993 2022. [DOI: 10.1016/j.radphyschem.2021.109882] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Nakagawa K, Yooin W, Saenjum C. Investigation of Pigments in Thai Purple Rice Using Electron Paramagnetic Resonance Imaging and HPLC. J Nutr Sci Vitaminol (Tokyo) 2019; 65:S217-S221. [PMID: 31619634 DOI: 10.3177/jnsv.65.s217] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Paramagnetic species (radicals) related pigments in Thai purple rice were investigated by electron paramagnetic resonance (EPR), X-band (9 GHz) EPR imaging (EPRI), and HPLC. The location and distribution of the paramagnetic species in purple and white rice were determined by EPR and EPRI. EPR primarily detected three paramagnetic species in purple rice, which were identified as organic radicals, Mn2+, and Fe3+ based on the g-values and hyperfine components of the EPR signals. Noninvasive two-dimensional (2D) EPRI revealed that these stable radicals are primarily located in the pigmented region of purple rice, while very few radicals were observed in the interior of the rice. HPLC revealed that the major compounds were cyanidin-3-O-glucoside and peonidin-3-O-glucoside. EPR, EPR imaging, and HPLC results indicate that the stable radicals contain the radical state of anthocyanins and are mostly found within the pigmented embryo region of purple rice. They could be either associated with antioxidant activities or could be one of the products of their oxidative decomposition.
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Affiliation(s)
- Kouichi Nakagawa
- Division of Regional Innovation, Graduate School of Health Sciences, Hirosaki University
| | - Wipawadee Yooin
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Chiang Mai University
| | - Chalermpong Saenjum
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Chiang Mai University.,Cluster of Excellence on Biodiversity based Economics and Society (B.BES-CMU), Chiang Mai University
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Nakagawa K, Yooin W, Saenjum C. EPR and HPLC Investigation of Pigments in Thai Purple Rice. J Oleo Sci 2018; 67:1347-1353. [PMID: 30305563 DOI: 10.5650/jos.ess18093] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
We investigated the pigments in Thai purple rice using electron paramagnetic resonance (EPR), X-band (9 GHz) EPR imaging (EPRI), and HPLC. The location and spatial distribution of the paramagnetic species in purple and white rice were determined by EPR and EPRI. EPR primarily detected three paramagnetic species in purple rice, which were identified as stable radicals, Mn2+, and Fe3+ based on the gvalues and hyperfine components of the EPR signals. Subsequent noninvasive two-dimensional (2D) EPRI revealed that these stable radicals are primarily located in the pigmented region of purple rice, while very few radicals were observed in the interior of the rice. HPLC revealed that the major compounds were cyanidin-3-O-glucoside and peonidin-3-O-glucoside. Scavenging activities, EPR, and EPR imaging results indicate that the stable radicals contain the radical state of anthocyanins and are mostly found within the pigmented embryo region of purple rice. They could be either associated with scavenging activities or could be one of the products of their oxidative decomposition.
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Affiliation(s)
- Kouichi Nakagawa
- Division of Regional Innovation, Graduate School of Health Sciences, Hirosaki University
| | - Wipawadee Yooin
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Chiang Mai University
| | - Chalermpong Saenjum
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Chiang Mai University.,Cluster of Excellence on Biodiversity based Economics and Society (B.BES-CMU), Chiang Mai University
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Lu L, Li Z, Zuo Y, Zhao L, Liu B. Radioprotective activity of glutathione on cognitive ability in X-ray radiated tumor-bearing mice. Neurol Res 2018; 40:758-766. [PMID: 29847238 DOI: 10.1080/01616412.2018.1476080] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Lina Lu
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou, Gansu, China
- School of Chemical Engineering, Northwest University for Nationalities, Lanzhou, Gansu, China
| | - Zongli Li
- Department of Pharmacy, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, China
| | - Yanhua Zuo
- Department of Pharmacy, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, China
| | - Libo Zhao
- School of Stomatology, Lanzhou University, Lanzhou, Gansu, China
| | - Bin Liu
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou, Gansu, China
- School of Stomatology, Lanzhou University, Lanzhou, Gansu, China
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Nakagawa K, Matsumoto K, Chaiserm N, Priprem A. X-band Electron Paramagnetic Resonance Investigation of Stable Organic Radicals Present under Cold Stratification in 'Fuji' Apple Seeds. J Oleo Sci 2018; 66:1375-1379. [PMID: 29199210 DOI: 10.5650/jos.ess17160] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
We investigated stable organic radicals formed in response to cold stratification in 'Fuji' apple seeds using X-band (9 GHz) electron paramagnetic resonance (EPR) technique. This technique primarily detected two paramagnetic species in each seed. These two different radical species were assigned as a stable organic radical and Mn2+ species based on the g values and hyperfine components. Signal from the stable radicals was noted at a g value of about 2.00 and was strong and relatively stable. Significant radical intensity changes were observed in apple seeds on refrigeration along with water supplementation. The strongest radical intensity and a very weak Mn2+ signal were also observed for the seeds kept in moisture-containing sand in a refrigerator. Noninvasive EPR of the radicals present in each seed revealed that the stable radicals were located primarily in the seed coat. These results indicate that the significant radical intensity changes in apple seeds under refrigeration for at least 90 days followed by water supplementation for one week, can be related to cold stratification of the seeds.
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Affiliation(s)
- Kouichi Nakagawa
- Division of Regional Innovation, Graduate School of Health Sciences, Hirosaki University
| | | | - Nattakan Chaiserm
- Division of Pharmaceutical Technology, Faculty of Pharmaceutical Sciences, Khon Kaen University
| | - Aroonsri Priprem
- Division of Pharmaceutical Technology, Faculty of Pharmaceutical Sciences, Khon Kaen University
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Nakagawa K, Maeda H. Investigating Pigment Radicals in Black Rice Using HPLC and Multi-EPR. J Oleo Sci 2017; 66:543-547. [PMID: 28458389 DOI: 10.5650/jos.ess16245] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
We investigated the location and distribution of paramagnetic species in black and white rice using electron paramagnetic resonance (EPR), X-band (9 GHz) EPR imaging (EPRI), and HPLC. EPR primarily detected two paramagnetic species in black rice, which were identified as a stable radical and Mn2+ species, based on the g values and hyperfine components of the EPR signals. The signal from the stable radical appeared at g ≈ 2.00 and was relatively strong and stable. Subsequent noninvasive two-dimensional (2D) EPRI revealed that this stable radical was primarily located in the pigmented region of black rice, while very few radicals were observed in the rice interior. Pigments extracted from black rice were analyzed using HPLC; the major compound was found to be cyanidin-3-glucoside. EPR and HPLC results indicate that the stable radical was only found within the pigmented region of the rice, and that it could either be cyanidin-3-glucoside, or one of its oxidative decomposition products.
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Affiliation(s)
- Kouichi Nakagawa
- Division of Regional Innovation, Graduate School of Health Sciences, Hirosaki University
| | - Hayato Maeda
- Faculty of Agriculture and Life Science, Hirosaki University
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Nakagawa K, Epel B. Investigating the Distribution of Stable Paramagnetic Species in an Apple Seed Using X-Band EPR and EPR Imaging. J Oleo Sci 2017; 66:315-319. [PMID: 28190804 DOI: 10.5650/jos.ess16152] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
This study investigated the location and distribution of paramagnetic species in apple seeds using electron paramagnetic resonance (EPR) and X-band (9 GHz) EPR imaging (EPRI). EPR primarily detected two paramagnetic species per measured seed. These two different radical species were assigned as stable radicals and Mn2+ species based on the g values and hyperfine components. The signal from the stable radical was noted at g ≈ 2.00 and was strong and relatively stable. The subsequent noninvasive EPRI of the radical present in each seed revealed that the stable radicals were located primarily in the seed coat, with very few radicals observed in the cotyledon of the seed. These results indicate that the stable radical species were only found within the seed coat, and few radical species were found in other seed parts.
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Affiliation(s)
- Kouichi Nakagawa
- Division of Regional Innovation, Graduate School of Health Sciences, Hirosaki University
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Nakagawa K, Maeda H. EPR imaging and HPLC characterization of the pigment-based organic free radical in black soybean seeds. Free Radic Res 2017; 51:187-192. [PMID: 28166645 DOI: 10.1080/10715762.2017.1291940] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
We investigated the location and distribution of paramagnetic species in dry black, brown, and yellow (normal) soybean seeds using electron paramagnetic resonance (EPR), X-band (9 GHz) EPR imaging (EPRI), and HPLC. EPR primarily detected two paramagnetic species in black soybean. These two different radical species were assigned as stable organic radical and Mn2+ species based on the g values and hyperfine structures. The signal from the stable radical was noted at g ≈ 2.00 and was relatively strong and stable. Subsequent noninvasive two-dimensional (2D) EPRI of the radical present in black soybean revealed that the stable radical was primarily located in the pigmented region of the soybean coat, with very few radicals observed in the soybean cotyledon (interior). Pigments extracted from black soybean were analyzed using HPLC. The major compound was found to be cyanidin-3-glucoside. Multi-EPR and HPLC results indicate that the stable radical was only found within the pigmented region of the soybean coat, and it could be cyanidin-3-glucoside or an oxidative decomposition product.
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Affiliation(s)
- Kouichi Nakagawa
- a Division of Regional Innovation, Graduate School of Health Sciences , Hirosaki University , Hirosaki , Japan
| | - Hayato Maeda
- b Faculty of Agriculture and Life Science , Hirosaki University , Hirosaki , Aomori , Japan
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Nakagawa K, Hara H, Matsumoto KI. C-Ion- and X-ray-Induced Sucrose Radicals Investigated by CW EPR and 9 GHz EPR Imaging. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2017. [DOI: 10.1246/bcsj.20160290] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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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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Nakagawa K, Hara H. Investigation of radical locations in various sesame seeds by CW EPR and 9-GHz EPR imaging. Free Radic Res 2014; 49:1-6. [PMID: 25241851 DOI: 10.3109/10715762.2014.967691] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
We investigated the location of radical in various sesame seeds using continuous-wave (CW) electron paramagnetic resonance (EPR) and 9-GHz EPR imaging. CW EPR detected persistent radicals (single line) for various sesame seeds. The EPR linewidth of black sesame seeds was narrower than that of the irradiated white sesame seeds. A very small signal was detected for the white sesame seeds. Two-dimensional (2D) imaging using a 9-GHz EPR imager showed that radical locations vary for various sesame seeds. The paramagnetic species in black sesame seeds were located on the seed coat (skin) and in the hilum region. The signal with the highest intensity was obtained from the hilum part. A very low-intensity image was observed for the white sesame seeds. In addition, the 2D imaging of the irradiated white sesame seeds showed that free radicals were located throughout the entire seed. For the first time, CW EPR and 9-GHz EPR imaging showed the exact location of radical species in various sesame seeds.
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Affiliation(s)
- K Nakagawa
- Department of Radiological Life Sciences, Graduate School of Health Sciences, Hirosaki University , Hirosaki , Japan
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Nakagawa K, Epel B. Locations of radical species in black pepper seeds investigated by CW EPR and 9GHz EPR imaging. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 131:342-346. [PMID: 24835937 PMCID: PMC4363116 DOI: 10.1016/j.saa.2014.04.100] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2014] [Revised: 04/11/2014] [Accepted: 04/22/2014] [Indexed: 06/03/2023]
Abstract
In this study, noninvasive 9GHz electron paramagnetic resonance (EPR)-imaging and continuous wave (CW) EPR were used to investigate the locations of paramagnetic species in black pepper seeds without further irradiation. First, lithium phthalocyanine (LiPC) phantom was used to examine 9GHz EPR imaging capabilities. The 9GHz EPR-imager easily resolved the LiPC samples at a distance of ∼2mm. Then, commercially available black pepper seeds were measured. We observed signatures from three different radical species, which were assigned to stable organic radicals, Fe(3+), and Mn(2+) complexes. In addition, no EPR spectral change in the seed was observed after it was submerged in distilled H2O for 1h. The EPR and spectral-spatial EPR imaging results suggested that the three paramagnetic species were mostly located at the seed surface. Fewer radicals were found inside the seed. We demonstrated that the CW EPR and 9GHz EPR imaging were useful for the determination of the spatial distribution of paramagnetic species in various seeds.
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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.
| | - Boris Epel
- Department of Radiation and Cellular Oncology, The University of Chicago, MC1105, 5841 S. Maryland Ave, Chicago, IL 60637-1463, USA
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