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Tanabe S, Itagaki S, Sun S, Matsui K, Kinoshita T, Nishii S, Yamamoto Y, Sadanaga Y, Shiigi H. Quantification of Enterohemorrhagic Escherichia coli via Optical Nanoantenna and Temperature-responsive Artificial Antibodies. ANAL SCI 2021; 37:1597-1601. [PMID: 33994418 DOI: 10.2116/analsci.21p135] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Enterohemorrhagic Escherichia coli are a dangerous bacterium known to be harmful to the human body, with some infections even resulting in death. Given this danger, food factories are required to perform a quick bacterial test to confirm the absence of this pathogen prior to shipping. We have developed a novel molecular imprinting polymer (MIP) particle that has encapsulated gold nanoparticles (AuNPs) and which can function as both a receptor and an optical signal transmitter in biological systems. This MIP particle is artificially synthesized and can be engineered to specifically recognize and capture antigens on the bacterial cell membrane. In addition, MIP particles containing AuNPs generate strong scattered light signals, and binding of the MIP particles improves the optical intensity of the target bacterial cells. This enables clear visualization under a dark-field microscope and quantification of the target bacteria using the scattering light intensity. Here we describe the successful quantification of Escherichia coli O157 cells in real meat samples using this technology in conjunction with a simple labelling step.
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Affiliation(s)
- So Tanabe
- Department of Applied Chemistry, Osaka Prefecture University
| | | | - Shuyi Sun
- Department of Applied Chemistry, Osaka Prefecture University
| | - Kyohei Matsui
- Department of Applied Chemistry, Osaka Prefecture University
| | | | - Shigeki Nishii
- Department of Applied Chemistry, Osaka Prefecture University
| | - Yojiro Yamamoto
- Department of Applied Chemistry, Osaka Prefecture University.,GreenChem. Inc
| | | | - Hiroshi Shiigi
- Department of Applied Chemistry, Osaka Prefecture University
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2
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Pan T, Shan X, Jiang D, Qi L, Wang W, Chen Z. Fluorometric Aptasensor for Determination of Escherichia coli O157:H7 by FRET Effect between Aminated Carbon Quantum Dots and Graphene Oxide. ANAL SCI 2021; 37:833-838. [PMID: 33041308 DOI: 10.2116/analsci.20p306] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A fluorometric aptasensor based on Escherichia coli O157:H7 (E. coli O157:H7) aptamer labeled aminated carbon quantum dots (NH2-CQDs) and graphene oxide (GO) for the determination of E. coli O157:H7 was developed. In this research, carboxyl group (-COOH) terminated E. coli O157:H7 aptamer was steadily labeled to NH2-CQDs by amidation reaction, and played the role of energy donor and was responsible for chemical recognition. Correspondingly, GO served as an energy acceptor. The introduction of NH2-CQDs not only made the aptamer bond stably through covalent bond, but also significantly enhanced the fluorescence intensity compared with general CQDs. The NH2-CQDs-aptamer is adsorbed on the surface of GO through π-π stacking and hydrophobic interaction. The fluorescence of NH2-CQDs-aptamer was quenched via fluorescence resonance energy transfer (FRET) between NH2-CQDs and GO. After adding E. coli O157:H7, the specific binding affinity between NH2-CQDs-aptamer and E. coli O157:H7 lead to desorption of NH2-CQDs-aptamer from GO, and recovery of the fluorescence intensity of NH2-CQDs-aptamer. Under the optimal conditions, the increased fluorescence intensity showed a good linear relationship to concentrations of E. coli O157:H7 in the range 102 - 107 cells/mL, with a detection limit of 89 cells/mL. Furthermore, the developed method was successfully applied to the determination of E. coli O157:H7 in commercial milk samples.
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Affiliation(s)
- Tao Pan
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Changzhou University
| | - Xueling Shan
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Changzhou University
| | - Ding Jiang
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Changzhou University
| | - Lu Qi
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Changzhou University
| | - Wenchang Wang
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Changzhou University
| | - Zhidong Chen
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Changzhou University
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3
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Matsui K, Tanabe S, Sun S, Nguyen D, Kinoshita T, Yamamoto Y, Shiigi H. Development of Metal Nanoparticle-immobilized Microplate for High-throughput and Highly Sensitive Fluorescence Analysis. ANAL SCI 2020; 36:1461-1465. [PMID: 32779577 DOI: 10.2116/analsci.20p225] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Enzyme-linked immunosorbent assay (ELISA) is a widespread analytical biochemistry assay. In this work, a direct ELISA method using a metallic nanoparticle (NP)-immobilized 96-well plate was developed for high-throughput, highly sensitive fluorescence analysis. Immobilization of metallic NPs on a 96-well plate effectively amplified fluorescence signals of the assay. The silver (Ag) NP-immobilized plate showed the best fluorescence enhancement effect of all the metal-immobilized plates tested. We used the Ag NP-immobilized plate to detect biomolecules and bacteria and found that both the fluorescence intensity and the limit of detection (LOD) were strongly enhanced by more than 100 times compared with those of the unmodified 96-well plates. Quantitative and qualitative considerations for target bacteria regarding the impact of autofluorescence on detection were successfully obtained for several strains. Our results demonstrate the potential of applying Ag NPs for enhancing the efficiency of direct and indirect ELISA assays.
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Affiliation(s)
- Kyohei Matsui
- Department of Applied Chemistry, Osaka Prefecture University
| | - So Tanabe
- Department of Applied Chemistry, Osaka Prefecture University
| | - Shuyi Sun
- Department of Applied Chemistry, Osaka Prefecture University
| | - Dung Nguyen
- Department of Applied Chemistry, Osaka Prefecture University
| | | | - Yojiro Yamamoto
- Department of Applied Chemistry, Osaka Prefecture University.,GreenChem. Inc
| | - Hiroshi Shiigi
- Department of Applied Chemistry, Osaka Prefecture University
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4
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Sun S, Matsui K, Tanabe S, Nguyen D, Kinoshita T, Yamamoto Y, Shiigi H. Fluorescence Enhancement Effect by Metal Nanoparticles-immobilized Microplate. ANAL SCI 2020; 36:787-789. [PMID: 32595192 DOI: 10.2116/analsci.advpub_20c009] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
In this reported work, we achieved high-throughput, highly sensitive fluorescent analysis using an enzyme-linked immunosorbent assay (ELISA) that employed a metallic nanoparticle (NP)-immobilized 96-well plate. The immobilization of metallic NPs on a 96-well plate effectively amplified fluorescent signals of the assay. The silver (Ag) NP-immobilized plate showed the best fluorescent enhancement effect of all plates immobilized by metal NPs. Our results demonstrate the potential of applying Ag NPs to enhance the efficiency of direct and indirect ELISA by the labeling of targets.
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Affiliation(s)
- Shuyi Sun
- Department of Applied Chemistry, Osaka Prefecture University
| | - Kyohei Matsui
- Department of Applied Chemistry, Osaka Prefecture University
| | - So Tanabe
- Department of Applied Chemistry, Osaka Prefecture University
| | - Dung Nguyen
- Department of Applied Chemistry, Osaka Prefecture University
| | | | - Yojiro Yamamoto
- Department of Applied Chemistry, Osaka Prefecture University.,GreenChem. Inc
| | - Hiroshi Shiigi
- Department of Applied Chemistry, Osaka Prefecture University
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5
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Molecularly Imprinted Polymers for Cell Recognition. Trends Biotechnol 2019; 38:368-387. [PMID: 31677857 DOI: 10.1016/j.tibtech.2019.10.002] [Citation(s) in RCA: 105] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Revised: 09/27/2019] [Accepted: 10/03/2019] [Indexed: 12/21/2022]
Abstract
Since their conception 50 years ago, molecularly imprinted polymers (MIPs) have seen extensive development both in terms of synthetic routes and applications. Cells are perhaps the most challenging target for molecular imprinting. Although early work was based almost entirely around microprinting methods, recent developments have shifted towards epitope imprinting to generate MIP nanoparticles (NPs). Simultaneously, the development of techniques such as solid phase MIP synthesis has solved many historic issues of MIP production. This review briefly describes various approaches used in cell imprinting with a focus on applications of the created materials in imaging, drug delivery, diagnostics, and tissue engineering.
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Saito M, Ishiki K, Nguyen DQ, Shiigi H. A Microbial Platform Based on Conducting Polymers for Evaluating Metabolic Activity. Anal Chem 2019; 91:12793-12798. [DOI: 10.1021/acs.analchem.9b02350] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Maki Saito
- Department of Applied Chemistry, Osaka Prefecture University, 1-2 Gakuen, Naka, Sakai, Osaka 599-8570, Japan
| | - Kengo Ishiki
- Department of Applied Chemistry, Osaka Prefecture University, 1-2 Gakuen, Naka, Sakai, Osaka 599-8570, Japan
| | - Dung Q. Nguyen
- Department of Applied Chemistry, Osaka Prefecture University, 1-2 Gakuen, Naka, Sakai, Osaka 599-8570, Japan
| | - Hiroshi Shiigi
- Department of Applied Chemistry, Osaka Prefecture University, 1-2 Gakuen, Naka, Sakai, Osaka 599-8570, Japan
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7
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Nguyen DQ, Shan X, Saito M, Iwamoto K, Chen Z, Shiigi H. Evaluation of Surface Structure of Escherichia coli Using Polypyrrole Matrix. ANAL SCI 2019; 35:763-767. [PMID: 30905905 DOI: 10.2116/analsci.19p068] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
We propose a method to evaluate the surface structure of Escherichia coli focusing on the doping state of bacterial cells into polypyrrole (PPy) matrix. We found that the orientation of doping states of E. coli O rough was different from those of other serotypes of E. coli cells, which had O-antigen on their outer membrane. The results indicated that more than seventy percent of E. coli cells having O-antigen was horizontally doped into PPy matrix based on the chemical structure and the placement of O-antigen. On the other hand, the percentage for horizontal doping state of E. coli O rough cells was only approximately fifty percent. Moreover, the cells of each E. coli serotypes were specifically bound to their own shape-complementary cavities on the microspheres, but the binding affinity of E. coli O rough was a bit lower than that of other serotypes.
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Affiliation(s)
- Dung Q Nguyen
- Department of Applied Chemistry, Osaka Prefecture University
| | - Xueling Shan
- School of Petrochemical Engineering, Changzhou University
| | - Maki Saito
- Department of Applied Chemistry, Osaka Prefecture University
| | - Kota Iwamoto
- Department of Applied Chemistry, Osaka Prefecture University
| | - Zhidong Chen
- School of Petrochemical Engineering, Changzhou University
| | - Hiroshi Shiigi
- Department of Applied Chemistry, Osaka Prefecture University
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8
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Liu S, Lämmerhofer M. Functionalized gold nanoparticles for sample preparation: A review. Electrophoresis 2019; 40:2438-2461. [PMID: 31056767 DOI: 10.1002/elps.201900111] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 04/23/2019] [Accepted: 04/27/2019] [Indexed: 12/13/2022]
Abstract
Sample preparation is a crucial step for the reliable and accurate analysis of both small molecule and biopolymers which often involves processes such as isolation, pre-concentration, removal of interferences (purification), and pre-processing (e.g., enzymatic digestion) of targets from a complex matrix. Gold nanoparticle (GNP)-assisted sample preparation and pre-concentration has been extensively applied in many analytical procedures in recent years due to the favorable and unique properties of GNPs such as size-controlled synthesis, large surface-to-volume ratio, surface inertness, straightforward surface modification, easy separation requiring minimal manipulation of samples. This review article primarily focuses on applications of GNPs in sample preparation, in particular for bioaffinity capture and biocatalysis. In addition, their most common synthesis, surface modification and characterization methods are briefly summarized. Proper surface modification for GNPs designed in accordance to their target application directly influence their functionalities, e.g., extraction efficiencies, and catalytic efficiencies. Characterization of GNPs after synthesis and modification is worthwhile for monitoring and controlling the fabrication process to ensure proper quality and functionality. Parameters such as morphology, colloidal stability, and physical/chemical properties can be assessed by methods such as surface plasmon resonance, dynamic light scattering, ζ-potential determinations, transmission electron microscopy, Taylor dispersion analysis, and resonant mass measurement, among others. The accurate determination of the surface coverage appears to be also mandatory for the quality control of functionality of the nanoparticles. Some promising applications of (functionalized) GNPs for bioanalysis and sample preparation are described herein.
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Affiliation(s)
- Siyao Liu
- Institute of Pharmaceutical Sciences, Pharmaceutical (Bio-)Analysis, University of Tübingen, Tübingen, Germany
| | - Michael Lämmerhofer
- Institute of Pharmaceutical Sciences, Pharmaceutical (Bio-)Analysis, University of Tübingen, Tübingen, Germany
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Shan X, Yamauchi T, Yamamoto Y, Shiigi H, Nagaoka T. A rapid and specific bacterial detection method based on cell-imprinted microplates. Analyst 2019; 143:1568-1574. [PMID: 29379911 DOI: 10.1039/c7an02057k] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Bacterial detection has attracted substantial interest in recent years owing to its importance in biology, medical care, drug discovery, and public health. For such applications, bacterial cell-imprinting technologies are regarded as potential methods, as they can fabricate artificial tailor-made receptors for cellular recognition. In comparison to conventional methods, which generally require a few days for bacterial determination, cell-imprinted polymers can save a substantial amount of time. Here, we report a high-throughput bacterial detection method based on a cell-imprinted 96-well microplate. The fabrication of the bacterial cell-imprinted polypyrrole and nafion complex was accomplished on a gold nanoparticle-coated microplate. The cell-imprinted polymer complex on the microplate can spontaneously rebind and specifically detect target cells with high selectivity in a short time frame (within 30 min). Furthermore, the microplates could discriminate particular target Escherichia coli O157:H7 cells from bacterial mixtures. This simple method may be used for a variety of applications such as clinical testing, food safety, and continuous environmental monitoring.
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Affiliation(s)
- Xueling Shan
- Department of Applied Chemistry, Osaka Prefecture University, 1-2 Gakuen, Naka, Sakai, Osaka 599-8570, Japan.
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10
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An efficient isolation of foodborne pathogen using surface-modified porous sponge. Food Chem 2019; 270:445-451. [DOI: 10.1016/j.foodchem.2018.07.125] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2017] [Revised: 03/07/2018] [Accepted: 07/18/2018] [Indexed: 12/23/2022]
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11
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Nguyen DQ, Ishiki K, Shiigi H. Single cell immunodetection of Escherichia coli O157:H7 on an indium-tin-oxide electrode by using an electrochemical label with an organic-inorganic nanostructure. Mikrochim Acta 2018; 185:465. [PMID: 30225738 DOI: 10.1007/s00604-018-3001-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Accepted: 09/09/2018] [Indexed: 11/29/2022]
Abstract
A rapid and highly sensitive method is described for the detection of enterohemorrhagic Escherichia coli O157:H7. An organic-inorganic nanostructure in which numerous gold nanoparticles (AuNPs) are enclosed with polyaniline (PANI) was utilized as an electrochemical label. The nanostructure showed (a) strong light scattering intensity due to the coupling effect of the surface plasmon resonance based on the presence of AuNPs, and (b) high electrochemical response due to the redox activity of PANI. To achieve selectivity, antibody against E. coli O157:H7 was immobilized on the surface of the nanostructure. The method exploits the combination of strong adsorption of bacterial cells onto the indium-tin-oxide (ITO) glass electrode without any special processing and specific binding of the nanostructured label to E. coli O157:H7. This enables the electrochemical detection of a single cell on the ITO electrode. The electrochemical response to E. coli O157:H7 was 30-fold higher than that to other types of bacteria. This procedure can be applied to the determination of E. coli O157:H7 even in the presence of other bacteria. Graphical abstract Schematic of a voltammetric immunoassay for Escherichia coli O157:H7 by using a nanocomposite consisting of gold nanoparticles and polyaniline on an ITO electrode.
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Affiliation(s)
- Dung Quang Nguyen
- Department of Applied Chemistry, Osaka Prefecture University, 1-2 Gakuen, Naka, Sakai, Osaka, 599-8570, Japan
| | - Kengo Ishiki
- Department of Applied Chemistry, Osaka Prefecture University, 1-2 Gakuen, Naka, Sakai, Osaka, 599-8570, Japan
| | - Hiroshi Shiigi
- Department of Applied Chemistry, Osaka Prefecture University, 1-2 Gakuen, Naka, Sakai, Osaka, 599-8570, Japan.
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12
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Ishiki K, Nguyen DQ, Morishita A, Shiigi H, Nagaoka T. Electrochemical Detection of Viable Bacterial Cells Using a Tetrazolium Salt. Anal Chem 2018; 90:10903-10909. [DOI: 10.1021/acs.analchem.8b02404] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Kengo Ishiki
- Department of Applied Chemistry, Osaka Prefecture University, 1-2 Gakuen, Naka, Sakai, Osaka 599-8570, Japan
| | - Dung Q. Nguyen
- Department of Applied Chemistry, Osaka Prefecture University, 1-2 Gakuen, Naka, Sakai, Osaka 599-8570, Japan
| | - Aya Morishita
- Department of Applied Chemistry, Osaka Prefecture University, 1-2 Gakuen, Naka, Sakai, Osaka 599-8570, Japan
| | - Hiroshi Shiigi
- Department of Applied Chemistry, Osaka Prefecture University, 1-2 Gakuen, Naka, Sakai, Osaka 599-8570, Japan
| | - Tsutomu Nagaoka
- Organization for Research Initiatives, Yamaguchi University, 2-16-1 Tokiwadai, Ube, Yamaguchi 755-8611, Japan
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13
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Kinoshita T, Ishiki K, Nguyen DQ, Shiigi H, Nagaoka T. Real-Time Evaluation of Bacterial Viability Using Gold Nanoparticles. Anal Chem 2018; 90:4098-4103. [DOI: 10.1021/acs.analchem.7b05439] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Takamasa Kinoshita
- Department of Applied Chemistry, Osaka Prefecture University, 1-2 Gakuen, Naka, Sakai, Osaka 599-8570, Japan
| | - Kengo Ishiki
- Department of Applied Chemistry, Osaka Prefecture University, 1-2 Gakuen, Naka, Sakai, Osaka 599-8570, Japan
| | - Dung Q. Nguyen
- Department of Applied Chemistry, Osaka Prefecture University, 1-2 Gakuen, Naka, Sakai, Osaka 599-8570, Japan
| | - Hiroshi Shiigi
- Department of Applied Chemistry, Osaka Prefecture University, 1-2 Gakuen, Naka, Sakai, Osaka 599-8570, Japan
| | - Tsutomu Nagaoka
- Department of Applied Chemistry, Osaka Prefecture University, 1-2 Gakuen, Naka, Sakai, Osaka 599-8570, Japan
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