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Ai G, Zhou Y, Zhang H, Wei Q, Luo B, Xie Y, Wang C, Xue X, Li A. Ultrasensitive molecular imprinted electrochemical sensor for in vivo determination of glycine betaine in plants. Food Chem 2024; 435:137554. [PMID: 37774618 DOI: 10.1016/j.foodchem.2023.137554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 09/18/2023] [Accepted: 09/19/2023] [Indexed: 10/01/2023]
Abstract
Glycine betaine (GB) is a bioactive molecule protecting plants from abiotic stress. This study fabricated an ultrasensitive molecular imprinted polymer (MIP) electrochemical sensor to perform in vivo measurements of GB. Polydopamine (PDA) was formed on the carboxylated multi-walled carbon nanotubes (COOH-MWCNTs) by spontaneous polymerisation of dopamine (DA). Then MIP-coated MWCNTs were fabricated on a Au nanoparticles (NP) and thionine (Thi) modified screen-printed electrode (SPE). The MIP-COOH-MWCNTs/pThi/AuNPs/SPE exhibited an ultrasensitive GB detection response between 1 fmol/L and 10 mmol/L (R2 = 0.996) with a low detection limit (0.707 fmol/L, S/N = 3). In vivo measurement of GB in cucumber seedling leaves under different salinity stress conditions confirmed the practical applicability of the MIP sensor. Thus, this study proposed a novel and promising fabrication method for an electrochemical MIP sensor that has broad application prospects in precision agriculture.
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Affiliation(s)
- Geng Ai
- Intelligent Equipment Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China; College of Science, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Yanan Zhou
- Intelligent Equipment Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China
| | - Heng Zhang
- Intelligent Equipment Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China
| | - Qian Wei
- Intelligent Equipment Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China
| | - Bin Luo
- Intelligent Equipment Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China
| | - Yingge Xie
- College of Science, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Cheng Wang
- Intelligent Equipment Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China
| | - Xuzhang Xue
- Intelligent Equipment Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China
| | - Aixue Li
- Intelligent Equipment Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China.
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Hong T, Liu X, Zhou Q, Liu Y, Guo J, Zhou W, Tan S, Cai Z. What the Microscale Systems "See" In Biological Assemblies: Cells and Viruses? Anal Chem 2021; 94:59-74. [PMID: 34812604 DOI: 10.1021/acs.analchem.1c04244] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Tingting Hong
- School of Pharmacy, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Xing Liu
- School of Pharmacy, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Qi Zhou
- School of Pharmacy, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Yilian Liu
- School of Pharmacy, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Jing Guo
- School of Pharmacy, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Wenhu Zhou
- Xiangya School of Pharmaceutical Sciences, Central South University, 172 Tongzipo Road, Changsha, Hunan 410013, China
| | - Songwen Tan
- Xiangya School of Pharmaceutical Sciences, Central South University, 172 Tongzipo Road, Changsha, Hunan 410013, China.,Jiangsu Dawning Pharmaceutical Co., Ltd., Changzhou, Jiangsu 213100, China
| | - Zhiqiang Cai
- School of Pharmacy, Changzhou University, Changzhou, Jiangsu 213164, China.,Jiangsu Dawning Pharmaceutical Co., Ltd., Changzhou, Jiangsu 213100, China
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Tu H, Zhang B, Zhang X, Zhao C, Li L, Wang J, Chen Z, Wang P, Li Z. Magnetic thermosensitive polymer composite carrier with target spacing for enhancing immobilized enzyme performance. Enzyme Microb Technol 2021; 150:109896. [PMID: 34489019 DOI: 10.1016/j.enzmictec.2021.109896] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2021] [Revised: 08/03/2021] [Accepted: 08/16/2021] [Indexed: 01/09/2023]
Abstract
A novel magnetic thermosensitive polymer composite carrier with target spacing was developed. In this strategy, thermosensitive polymer grafted on magnetic Fe3O4 for enhancing immobilized penicillin G acylase (PGA) performance and introduce immobilized target spacing into magnetic carriers for the first time. Fe3O4 nanoparticles were synthesized by a reverse microemulsion method. The modifier used was the silane coupling agent γ-methylacryloxypropyl trimethoxysilane (KH570) and then reacting with a reversible-adaptive fragmentation chain transfer (RAFT) reagent, 2-cyano-2-propyldodecyl trithiocarbonate (CPDTC). The thermo-sensitive nanoparticle-composite carrier of Fe3O4-grafted-poly N, N-diethyl acrylamide-block-poly β-Hydroxyethyl methacrylate-block-random copolymer of glycidyl methacrylate and methyl methacrylate (Fe3O4-g-PDEA-b-PHEMA-b-P(MMA-co-GMA)) were synthesized by RAFT polymerization technique that used N, N-diethyl acrylamide (DEA), β-Hydroxyethyl methacrylate (HEMA), Glycidyl methacrylate (GMA) and Methyl methacrylate (MMA) as monomer, then which were employed as functional carriers for the immobilization of PGA. Within the carrier, the epoxy group of GMA segment was a target immobilization site for PGA and the introduction of MMA reflected the target space of immobilized PGA to improve catalytic activity and catalytic activity recovery rate of the immobilized PGA. Characterizations demonstrated that the triblock copolymers grafted Fe3O4 nanoparticles were successfully fabricated by the structure design. Besides, under these circumstances the enzyme activity (EA), enzyme loading capacity (ELC) and catalytic activity recovery ration (CAR) reached 31235 U/g, 128.39 mg/g and 93.32 %, respectively. The catalytic activity of immobilized PGA maintained 87.4 % of initial value and the recovery ratio (R) of immobilized PGA reached 96.22 % after recycling 12 times. Furthermore, the immobilized PGA exhibited advantages of low temperature homogeneous catalysis and magnetic separation, which indicated broad application prospects in the biocatalysts' field.
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Affiliation(s)
- Hongyi Tu
- College of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou, 730050, China; State Key Laboratory of Advanced Progressing and Recycling of Nonferrous Metal Materials, Lanzhou University of Technology, Lanzhou, 730050, China
| | - Boyuan Zhang
- College of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou, 730050, China; State Key Laboratory of Advanced Progressing and Recycling of Nonferrous Metal Materials, Lanzhou University of Technology, Lanzhou, 730050, China
| | - Xiayun Zhang
- College of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou, 730050, China; State Key Laboratory of Advanced Progressing and Recycling of Nonferrous Metal Materials, Lanzhou University of Technology, Lanzhou, 730050, China
| | - Chunli Zhao
- College of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou, 730050, China; State Key Laboratory of Advanced Progressing and Recycling of Nonferrous Metal Materials, Lanzhou University of Technology, Lanzhou, 730050, China
| | - Lin Li
- College of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou, 730050, China; State Key Laboratory of Advanced Progressing and Recycling of Nonferrous Metal Materials, Lanzhou University of Technology, Lanzhou, 730050, China
| | - Jianbin Wang
- College of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou, 730050, China; State Key Laboratory of Advanced Progressing and Recycling of Nonferrous Metal Materials, Lanzhou University of Technology, Lanzhou, 730050, China
| | - Zhenbin Chen
- College of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou, 730050, China; State Key Laboratory of Advanced Progressing and Recycling of Nonferrous Metal Materials, Lanzhou University of Technology, Lanzhou, 730050, China.
| | - Pingbo Wang
- College of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou, 730050, China; State Key Laboratory of Advanced Progressing and Recycling of Nonferrous Metal Materials, Lanzhou University of Technology, Lanzhou, 730050, China
| | - Zhizhong Li
- School of Life Science and Engineering, Lanzhou University of Technology, Lanzhou, 730050, China
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