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Ge Y, Wang J, Gu D, Cao W, Feng Y, Wu Y, Liu H, Xu Z, Zhang Z, Xie J, Geng S, Cong J, Liu Y. Low-temperature plasma jet suppresses bacterial colonisation and affects wound healing through reactive species. Wound Repair Regen 2024; 32:407-418. [PMID: 38602090 DOI: 10.1111/wrr.13178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Revised: 03/01/2024] [Accepted: 03/25/2024] [Indexed: 04/12/2024]
Abstract
An argon-based low-temperature plasma jet (LTPJ) was used to treat chronically infected wounds in Staphylococcus aureus-laden mice. Based on physicochemical property analysis and in vitro antibacterial experiments, the effects of plasma parameters on the reactive nitrogen and oxygen species (RNOS) content and antibacterial capacity were determined, and the optimal treatment parameters were determined to be 4 standard litre per minute and 35 W. Additionally, the plasma-treated activation solution had a bactericidal effect. Although RNOS are related to the antimicrobial effect of plasma, excess RNOS may be detrimental to wound remodelling. In vivo studies demonstrated that medium-dose LTPJ promoted MMP-9 expression and inhibited bacterial growth during the early stages of healing. Moreover, LTPJ increased collagen deposition, reduced inflammation, and restored blood vessel density and TGF-β levels to normal in the later stages of wound healing. Therefore, when treating chronically infected wounds with LTPJ, selecting the medium dose of plasma is more advantageous for wound recovery. Overall, our study demonstrated that low-temperature plasma jets may be a potential tool for the treatment of chronically infected wounds.
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Affiliation(s)
- Yang Ge
- The CAS Key Laboratory of Bio-Medical Diagnostics, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou, Jiangsu, China
| | - Jun Wang
- The CAS Key Laboratory of Bio-Medical Diagnostics, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou, Jiangsu, China
- Nanjing Guoke Medical Enginneering Technology Development co., LTD, Nanjing, Jiangsu, China
| | - DongHua Gu
- Department of Pathology, Suzhou Science & Technology Town Hospital, Suzhou, Jiangsu, China
| | - Wei Cao
- The CAS Key Laboratory of Bio-Medical Diagnostics, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou, Jiangsu, China
| | - Yongtong Feng
- The CAS Key Laboratory of Bio-Medical Diagnostics, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou, Jiangsu, China
| | - Yanfan Wu
- The CAS Key Laboratory of Bio-Medical Diagnostics, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou, Jiangsu, China
- School of Biomedical Engineering (Suzhou), Division of Life Sciences and Medicine, University of Science and Technology of China, Suzhou, Jiangsu, China
| | - Han Liu
- The CAS Key Laboratory of Bio-Medical Diagnostics, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou, Jiangsu, China
| | - Zhengping Xu
- The CAS Key Laboratory of Bio-Medical Diagnostics, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou, Jiangsu, China
| | - Zhe Zhang
- The CAS Key Laboratory of Bio-Medical Diagnostics, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou, Jiangsu, China
| | - Jinsong Xie
- The CAS Key Laboratory of Bio-Medical Diagnostics, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou, Jiangsu, China
| | - Shuang Geng
- The CAS Key Laboratory of Bio-Medical Diagnostics, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou, Jiangsu, China
| | - Junrui Cong
- Gannan Medical University, Ganzhou, Jiangxi, China
| | - Yi Liu
- The CAS Key Laboratory of Bio-Medical Diagnostics, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou, Jiangsu, China
- School of Biomedical Engineering (Suzhou), Division of Life Sciences and Medicine, University of Science and Technology of China, Suzhou, Jiangsu, China
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Zhu D, Liu D, Zhao Y, Li H, Wang Z, Lu N. Study of coaxial-dual-gap dielectric barrier discharge based on capillary: discharge characteristics and Escherichia coli decontamination. J Appl Microbiol 2023; 134:lxad183. [PMID: 37573137 DOI: 10.1093/jambio/lxad183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2023] [Revised: 07/16/2023] [Accepted: 08/11/2023] [Indexed: 08/14/2023]
Abstract
AIMS The medical capillary catheters occupy a high proportion of medical diagnosis, monitoring, and treatment devices, and will cause serious cross-infection without being disinfected adequately. This paper presents a new plasma structure for efficient inactivation of harmful microorganisms in medical capillaries. METHODS AND RESULTS An innovative coaxial-dual-gap dielectric barrier discharge reactor powered by nanosecond-pulsed power supply was designed for disinfection of Escherichia coli (E. coli) inside and outside medical capillary catheters in this work. Atmospheric helium plasma (AHP) and atmospheric air plasma (AAP) were successfully obtained inside and outside capillary (0.6 mm inner diameter and 1.0 mm outer diameter), respectively. The electrical and optical characteristics of AHP and AAP were investigated. As the threshold of applied voltage amplitude (Uamp) was <7.0 kV, only one helium glow discharge was generated inside the capillary at the rising and falling stages of pulse voltage. As the Uamp exceeded the threshold, two helium glow discharges were generated that further caused generation of air discharge. Under the Uamp of 9.0 kV, the production of AHP lowered the breakdown voltage in air gap, resulting in the formation of high-volume and uniform AAP, which was conducive to the realization of full inactivation. The inactivation rates of E. coli reached 98.13% and 99.99% by 2 min AHP and 0.5 min AAP treatment, respectively. CONCLUSIONS The electrical stress of AHP and the reactive oxygen and nitrogen species produced by AAP were contributed to the inactivation of E. coli. The results of SEM (Scanning Electron Microscope) show that plasma treatment can destroy the cellular structure of E. coli.
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Affiliation(s)
- Di Zhu
- School of Electrical Engineering, Dalian University of Technology, Dalian 116024, China
- State Grid Heilongjiang Electric Power Supply Company Limited Economic Research Institute, Harbin 150036, China
| | - Dongping Liu
- School of Electrical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Yao Zhao
- School of Electrical Engineering, Dalian University of Technology, Dalian 116024, China
- School of Physics, Dalian University of Technology, Dalian 116024, China
| | - Haiyu Li
- School of Electrical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Zhishang Wang
- School of Electrical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Na Lu
- School of Electrical Engineering, Dalian University of Technology, Dalian 116024, China
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Zhang H, Zhang C, Han Q. Mechanisms of bacterial inhibition and tolerance around cold atmospheric plasma. Appl Microbiol Biotechnol 2023:10.1007/s00253-023-12618-w. [PMID: 37421472 PMCID: PMC10390405 DOI: 10.1007/s00253-023-12618-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2023] [Revised: 05/29/2023] [Accepted: 06/01/2023] [Indexed: 07/10/2023]
Abstract
The grim situation of bacterial infection has undoubtedly become a major threat to human health. In the context of frequent use of antibiotics, a new bactericidal method is urgently needed to fight against drug-resistant bacteria caused by non-standard use of antibiotics. Cold atmospheric plasma (CAP) is composed of a variety of bactericidal species, which has excellent bactericidal effect on microbes. However, the mechanism of interaction between CAP and bacteria is not completely clear. In this paper, we summarize the mechanisms of bacterial killing by CAP in a systematic manner, discuss the responses of bacteria to CAP treatment that are considered to be related to tolerance and their underlying mechanisms, review the recent advances in bactericidal applications of CAP finally. This review indicates that CAP inhibition and tolerance of survival bacteria are a set of closely related mechanisms and suggests that there might be other mechanisms of tolerance to survival bacteria that had not been discovered yet. In conclusion, this review shows that CAP has complex and diverse bactericidal mechanisms, and has excellent bactericidal effect on bacteria at appropriate doses. KEY POINTS: • The bactericidal mechanism of CAP is complex and diverse. • There are few resistant bacteria but tolerant bacteria during CAP treatment. • There is excellent germicidal effect when CAP in combination with other disinfectants.
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Affiliation(s)
- Hao Zhang
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Disease, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, People's Republic of China
| | - Chengxi Zhang
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Disease, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, People's Republic of China
| | - Qi Han
- Department of Oral Pathology, State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, People's Republic of China.
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4
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Liu Y, Sun Y, Wang Y, Zhao Y, Duan M, Wang H, Dai R, Liu Y, Li X, Jia F. Inactivation mechanisms of atmospheric pressure plasma jet on Bacillus cereus spores and its application on low-water activity foods. Food Res Int 2023; 169:112867. [PMID: 37254316 DOI: 10.1016/j.foodres.2023.112867] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 04/15/2023] [Accepted: 04/18/2023] [Indexed: 06/01/2023]
Abstract
Bacillus cereus spore is one of the most easily contaminated bacterial spores in low-water activity foods such as black pepper. Atmospheric-pressure plasma jet (APPJ) has emerged as an emerging and promising method for microbial inactivation in food processing. This study aimed to investigate the efficacy of APPJ in inactivating spores under various treatment parameters and to examine the resulting alterations in spore structures and internal membrane properties. Meanwhile, the practical application of APPJ for spore inactivation in black pepper was also evaluated. The results indicated that air-APPJ had superior spore inactivation capability compared to N2 and O2-APPJ. After 20 min of APPJ treatment (50 L/min, 800 W, and 10 cm), the reduction in spore count (>2 log CFU/g) was significantly greater than that achieved by heat treatment (80℃). The damage of inner membranes was considered as the major reason of the dried spore inactivation by APPJ treatment. Moreover, it achieved a reduction in spore count of > 1 log CFU/g on inoculated black pepper without significantly affecting its color and flavor. Although the antioxidant activity of black pepper was slightly reduced, the overall quality of the product was not considerably affected by plasma treatment. This study concluded that APPJ is an effective technique for spore inactivation, offering promising potential for application in the decontamination of low-water activity foods.
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Affiliation(s)
- Yana Liu
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
| | - Yingying Sun
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
| | - Yuhan Wang
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
| | - Yijie Zhao
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
| | - Miaolin Duan
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
| | - Han Wang
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
| | - Ruitong Dai
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
| | - Yi Liu
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
| | - Xingmin Li
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China.
| | - Fei Jia
- Department of Biological and Agricultural Engineering, University of Arkansas, Fayetteville, AR, 72701, USA.
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5
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Xu M, Fukuyama Y, Nakai K, Liu Z, Sumiya Y, Okino A. Characteristics of Double-Layer, Large-Flow Dielectric Barrier Discharge Plasma Source for Toluene Decomposition. PLASMA 2023. [DOI: 10.3390/plasma6020016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023] Open
Abstract
The direct decomposition of toluene-containing humidified air at large flow rates was studied in two types of reactors with dielectric barrier discharge (DBD) features in ambient conditions. A scalable large-flow DBD reactor (single-layer reactor) was designed to verify the feasibility of large-flow plasma generation and evaluate its decomposition characteristics with toluene-containing humidified air, which have not been investigated. In addition, another large-flow DBD reactor with a multilayer structure (two-layer reactor) was developed as an upscale version of the single-layer reactor, and the scalability and superiority of the features of the multilayer structure were validated by comparing the decomposition characteristics of the two reactors. Consequently, the large-flow DBD reactor showed similar decomposition characteristics to those of the small-flow DBD reactor regarding applied voltage, flow velocity, flow rate, and discharge length, thus justifying the feasibility of large-flow plasma generation. Additionally, the two-layer reactor is more effective than the single-layer reactor, suggesting multilayer configuration is a viable scheme for further upscaled DBD systems. A high decomposition rate of 59.5% was achieved at the considerably large flow rate of 110 L/min. The results provide fundamental data and present guidelines for the implementation of the DBD plasma-based system as a solution for volatile organic compound abatement.
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Affiliation(s)
- Mao Xu
- Laboratory for Future Interdisciplinary Research of Science and Technology, Tokyo Institute of Technology, J2-32, 4259 Nagatsuta, Midori-ku, Yokohama 226-8502, Japan
| | - Yohei Fukuyama
- Laboratory for Future Interdisciplinary Research of Science and Technology, Tokyo Institute of Technology, J2-32, 4259 Nagatsuta, Midori-ku, Yokohama 226-8502, Japan
| | - Kazuki Nakai
- Laboratory for Future Interdisciplinary Research of Science and Technology, Tokyo Institute of Technology, J2-32, 4259 Nagatsuta, Midori-ku, Yokohama 226-8502, Japan
| | - Zhizhi Liu
- Laboratory for Future Interdisciplinary Research of Science and Technology, Tokyo Institute of Technology, J2-32, 4259 Nagatsuta, Midori-ku, Yokohama 226-8502, Japan
| | - Yuki Sumiya
- Laboratory for Future Interdisciplinary Research of Science and Technology, Tokyo Institute of Technology, J2-32, 4259 Nagatsuta, Midori-ku, Yokohama 226-8502, Japan
| | - Akitoshi Okino
- Laboratory for Future Interdisciplinary Research of Science and Technology, Tokyo Institute of Technology, J2-32, 4259 Nagatsuta, Midori-ku, Yokohama 226-8502, Japan
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IWAI T. Development of Highly Sensitive Inorganic/Organic Analytical Systems for Ultrasmall Samples Using Atmospheric Pressure Plasmas. BUNSEKI KAGAKU 2022. [DOI: 10.2116/bunsekikagaku.71.377] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Yanagawa Y, Suenaga Y, Iijima Y, Okino A, Mitsuhara I. Temperature-controlled atmospheric-pressure plasma treatment induces protein uptake via clathrin-mediated endocytosis in tobacco cells. PLANT BIOTECHNOLOGY (TOKYO, JAPAN) 2022; 39:179-183. [PMID: 35937533 PMCID: PMC9300422 DOI: 10.5511/plantbiotechnology.22.0105a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Accepted: 01/05/2022] [Indexed: 06/15/2023]
Abstract
Previously, we developed a method that uses temperature-controlled atmospheric-pressure plasma to induce protein uptake in plant cells. In the present work, we examined the mechanism underlying such uptake of a fluorescent-tagged protein in tobacco leaf cells. Intact leaf tissue was irradiated with N2 plasma generated by a multi-gas plasma jet and then exposed to the test protein (histidine-tagged superfolder green fluorescence protein fused to adenylate cyclase); fluorescence intensity was then monitored over time as an index of protein uptake. Confocal microscopy revealed that protein uptake potential was retained in the leaf tissue for at least 3 h after plasma treatment. Further examination indicated that the introduced protein reached a similar amount to that after overnight incubation at approximately 5 h after irradiation. Inhibitor experiments revealed that protein uptake was significantly suppressed compared with negative controls by pretreatment with sodium azide (inhibitor of adenosine triphosphate hydrolysis) or sucrose or brefeldin A (inhibitors of clathrin-mediated endocytosis) but not by pretreatment with genistein (inhibitor of caveolae/raft-mediated endocytosis) or cytochalasin D (inhibitor of micropinocytosis/phagocytosis), indicating that the N2 plasma treatment induced protein transportation across the plant plasma membrane via clathrin-mediated endocytosis.
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Affiliation(s)
- Yuki Yanagawa
- Institute of Agrobiological Sciences, NARO, 2-1-2 Kannondai, Tsukuba, Ibaraki 305-8602, Japan
- Graduate School of Horticulture, Chiba University, 648 Matsudo, Matsudo, Chiba 271-8510, Japan
| | - Yuma Suenaga
- Laboratory for Future Interdisciplinary Research of Science and Technology, Institute of Innovative Research, Tokyo Institute of Technology, J2-32, 4259 Nagatsuta, Midori-ku, Yokohama, Kanagawa 226-8502, Japan
| | - Yusuke Iijima
- Laboratory for Future Interdisciplinary Research of Science and Technology, Institute of Innovative Research, Tokyo Institute of Technology, J2-32, 4259 Nagatsuta, Midori-ku, Yokohama, Kanagawa 226-8502, Japan
| | - Akitoshi Okino
- Laboratory for Future Interdisciplinary Research of Science and Technology, Institute of Innovative Research, Tokyo Institute of Technology, J2-32, 4259 Nagatsuta, Midori-ku, Yokohama, Kanagawa 226-8502, Japan
| | - Ichiro Mitsuhara
- Institute of Agrobiological Sciences, NARO, 2-1-2 Kannondai, Tsukuba, Ibaraki 305-8602, Japan
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8
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Yoda N, Abe Y, Suenaga Y, Matsudate Y, Hoshino T, Sugano T, Nakamura K, Okino A, Sasaki K. Resin Cement-Zirconia Bond Strengthening by Exposure to Low-Temperature Atmospheric Pressure Multi-Gas Plasma. MATERIALS 2022; 15:ma15020631. [PMID: 35057349 PMCID: PMC8778450 DOI: 10.3390/ma15020631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/21/2021] [Revised: 01/11/2022] [Accepted: 01/12/2022] [Indexed: 12/10/2022]
Abstract
The purpose of this study was to investigate the effect of gas species used for low-temperature atmospheric pressure plasma surface treatment, using various gas species and different treatment times, on zirconia surface state and the bond strength between zirconia and dental resin cement. Three groups of zirconia specimens with different surface treatments were prepared as follows: untreated group, alumina sandblasting treatment group, and plasma treatment group. Nitrogen (N2), carbon dioxide (CO2), oxygen (O2), argon (Ar), and air were employed for plasma irradiation. The bond strength between each zirconia specimen and resin cement was compared using a tension test. The effect of the gas species for plasma irradiation on the zirconia surface was investigated using a contact angle meter, an optical interferometer, an X-ray diffractometer, and X-ray photoelectric spectroscopy. Plasma irradiation increased the wettability and decreased the carbon contamination on the zirconia surface, whereas it did not affect the surface topography and crystalline phase. The bond strength varied depending on the gas species and irradiation time. Plasma treatment with N2 gas significantly increased bond strength compared to the untreated group and showed a high bond strength equivalent to that of the sandblasting treatment group. The removal of carbon contamination from the zirconia surface and an increase in the percentage of Zr-O2 on the zirconia surface by plasma irradiation might increase bond strength.
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Affiliation(s)
- Nobuhiro Yoda
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan; (Y.M.); (T.S.); (K.S.)
- Correspondence: ; Tel.: +81-22-717-8369
| | - Yuri Abe
- FIRST, Tokyo Institute of Technology, Yokohama 226-8502, Japan; (Y.A.); (Y.S.); (A.O.)
| | - Yuma Suenaga
- FIRST, Tokyo Institute of Technology, Yokohama 226-8502, Japan; (Y.A.); (Y.S.); (A.O.)
| | - Yoshiki Matsudate
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan; (Y.M.); (T.S.); (K.S.)
| | - Tomohiro Hoshino
- Joint Research Department of Next-Generation Dental Material Engineering, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan;
| | - Takehiko Sugano
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan; (Y.M.); (T.S.); (K.S.)
| | - Keisuke Nakamura
- Department of Advanced Free Radical Science, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan;
| | - Akitoshi Okino
- FIRST, Tokyo Institute of Technology, Yokohama 226-8502, Japan; (Y.A.); (Y.S.); (A.O.)
| | - Keiichi Sasaki
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan; (Y.M.); (T.S.); (K.S.)
- Joint Research Department of Next-Generation Dental Material Engineering, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan;
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