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Ajayi R, Nqunqa S, Ngema N, Barry S, Feleni U, Mulaudzi T. UV-Vis detection of E. coli 0157:H7 using Vitis vinifera and Musa paradaisica modified Au-NPs. MethodsX 2024; 12:102522. [PMID: 38111791 PMCID: PMC10727931 DOI: 10.1016/j.mex.2023.102522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Accepted: 12/11/2023] [Indexed: 12/20/2023] Open
Abstract
Herein, we demonstrate the simple one-pot novel green synthesis of gold nanoparticles (Au-NPs) functionalised with a combination of banana peel (Musa paradaisica) and grape (Vitis vinifera) fruit extracts. The reaction mixture of aqueous gold chloride, banana peel and grape extracts revealed a purple colour after a reaction time of one hour, an indication of the presence and the successful synthesis of gold nanoparticles. The optical and structural properties of the green synthesized nanoparticles were analysed using Ultraviolet-Visible spectroscopy (UV-Vis) and Fourier Transform Infrared Spectroscopy (FTIR) while their surface morphology was determined using X-Ray Diffraction (XRD), High-Resolution Transmission Microscopy (HRTEM) and Small Angle X-Ray (SAX). Furthermore, a quick and simple surface plasmon resonance (SPR) study in the form of an optical sensor for the detection of Escherichia coli 0157:H7 strain was also achieved using UV-Vis. The obtained limit of detection (LOD) value for SPR for the GBPE|Au-NPs|GCE-based system was found to be 1 × 102 CFU/mL, a value well in the range for detection in seawater.•Green synthesis of gold nanoparticles (Au-NPs) was functionalised using banana peel (Musa paradaisica) and grape (Vitis vinifera) fruit extracts as capping and stabilizing agents.•Structural characterization of the Au-NPs was achieved using Ultraviolet-Visible spectroscopy (UV-Vis) and Fourier Transform Infrared Spectroscopy (FTIR) while their surface morphology was determined using X-Ray Diffraction (XRD), High-Resolution Transmission Microscopy (HRTEM) and Small Angle X-Ray (SAX).•The green synthesized Au-NPs were used to detect Escherichia coli 0157:H7 (E. coli 0157:H7) strain using Ultraviolet-Visible spectroscopy (UV-Vis) where the surface plasmon resonance (SPR) was studied.
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Affiliation(s)
- R.F. Ajayi
- SensorLab Laboratories, Chemistry Department, University of the Western Cape, Bellville 7535, South Africa
| | - S. Nqunqa
- SensorLab Laboratories, Chemistry Department, University of the Western Cape, Bellville 7535, South Africa
| | - N.P.P. Ngema
- SensorLab Laboratories, Chemistry Department, University of the Western Cape, Bellville 7535, South Africa
| | - S.C.L. Barry
- SensorLab Laboratories, Chemistry Department, University of the Western Cape, Bellville 7535, South Africa
| | - U. Feleni
- College of Science, Engineering and Technology, Institute for Nanotechnology and Water Sustainability, Johannesburg, Florida 1709, South Africa
| | - T. Mulaudzi
- Biotechnology Department, Life Sciences Building, University of the Western Cape, Bellville 7535, South Africa
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Liu M, Geng L, Zhang F, Dou S, Li F, Liu Z, Guo Y, Sun X. Isolation of Bacteria Aptamers with Non-SELEX for the Development of a Highly Sensitive Colorimetric Assay Based on Dual Signal Amplification. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:15990-15998. [PMID: 36508287 DOI: 10.1021/acs.jafc.2c06167] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
In this work, an aptamer against Escherichia coli is isolated via non-SELEX, which executes efficient selection by employing repetitive cycles of centrifugation-based partitioning, and the binding site of the aptamer on E. coli cell surfaces is inferred to be a membrane protein. Moreover, truncated sequence 2-17-2 with a higher affinity (Kd = 101.76 nM) is employed for highly sensitive colorimetric detection of bacteria based on the dual signal amplification strategy. When targets exist, the release of DNA 1 from the polymer activates a hybridization chain reaction (HCR) between DNA 1 and DNA 2, thereby inducing the aggregation of probe 1. Subsequently, DNA 3 dissociated from probe 1 as a linker DNA further assembles probe 2/3. In this system, two types of DNA@gold nanoparticles (AuNPs) coexist and successively aggregate AuNPs based on divergent triggering mechanisms. Under optimal conditions, the dual signal amplification strategy presents excellent sensitivity (10 CFU mL-1) and specificity, as well as the realization of real sample analysis.
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Affiliation(s)
- Mengyue Liu
- College of Agricultural Engineering and Food Science, Shandong University of Technology, No. 266 Xincun Xilu, Zibo 255049, Shandong, China
- Shandong Provincial Engineering Research Center of Vegetable Safety and Quality Traceability, No. 266 Xincun Xilu, Zibo 255049, Shandong, China
- Zibo City Key Laboratory of Agricultural Product Safety Traceability, No. 266 Xincun Xilu, Zibo 255049, Shandong, China
| | - Lingjun Geng
- College of Agricultural Engineering and Food Science, Shandong University of Technology, No. 266 Xincun Xilu, Zibo 255049, Shandong, China
- Shandong Provincial Engineering Research Center of Vegetable Safety and Quality Traceability, No. 266 Xincun Xilu, Zibo 255049, Shandong, China
- Zibo City Key Laboratory of Agricultural Product Safety Traceability, No. 266 Xincun Xilu, Zibo 255049, Shandong, China
| | - Fengjuan Zhang
- College of Agricultural Engineering and Food Science, Shandong University of Technology, No. 266 Xincun Xilu, Zibo 255049, Shandong, China
- Shandong Provincial Engineering Research Center of Vegetable Safety and Quality Traceability, No. 266 Xincun Xilu, Zibo 255049, Shandong, China
- Zibo City Key Laboratory of Agricultural Product Safety Traceability, No. 266 Xincun Xilu, Zibo 255049, Shandong, China
| | - Shouyi Dou
- College of Agricultural Engineering and Food Science, Shandong University of Technology, No. 266 Xincun Xilu, Zibo 255049, Shandong, China
- Shandong Provincial Engineering Research Center of Vegetable Safety and Quality Traceability, No. 266 Xincun Xilu, Zibo 255049, Shandong, China
- Zibo City Key Laboratory of Agricultural Product Safety Traceability, No. 266 Xincun Xilu, Zibo 255049, Shandong, China
| | - Falan Li
- College of Agricultural Engineering and Food Science, Shandong University of Technology, No. 266 Xincun Xilu, Zibo 255049, Shandong, China
- Shandong Provincial Engineering Research Center of Vegetable Safety and Quality Traceability, No. 266 Xincun Xilu, Zibo 255049, Shandong, China
- Zibo City Key Laboratory of Agricultural Product Safety Traceability, No. 266 Xincun Xilu, Zibo 255049, Shandong, China
| | - Zhanli Liu
- College of Agricultural Engineering and Food Science, Shandong University of Technology, No. 266 Xincun Xilu, Zibo 255049, Shandong, China
- Shandong Provincial Engineering Research Center of Vegetable Safety and Quality Traceability, No. 266 Xincun Xilu, Zibo 255049, Shandong, China
- Zibo City Key Laboratory of Agricultural Product Safety Traceability, No. 266 Xincun Xilu, Zibo 255049, Shandong, China
| | - Yemin Guo
- College of Agricultural Engineering and Food Science, Shandong University of Technology, No. 266 Xincun Xilu, Zibo 255049, Shandong, China
- Shandong Provincial Engineering Research Center of Vegetable Safety and Quality Traceability, No. 266 Xincun Xilu, Zibo 255049, Shandong, China
- Zibo City Key Laboratory of Agricultural Product Safety Traceability, No. 266 Xincun Xilu, Zibo 255049, Shandong, China
| | - Xia Sun
- College of Agricultural Engineering and Food Science, Shandong University of Technology, No. 266 Xincun Xilu, Zibo 255049, Shandong, China
- Shandong Provincial Engineering Research Center of Vegetable Safety and Quality Traceability, No. 266 Xincun Xilu, Zibo 255049, Shandong, China
- Zibo City Key Laboratory of Agricultural Product Safety Traceability, No. 266 Xincun Xilu, Zibo 255049, Shandong, China
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3
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Byzova NA, Zherdev AV, Gorbatov AA, Shevyakov AG, Biketov SF, Dzantiev BB. Rapid Detection of Lipopolysaccharide and Whole Cells of Francisella tularensis Based on Agglutination of Antibody-Coated Gold Nanoparticles and Colorimetric Registration. MICROMACHINES 2022; 13:2194. [PMID: 36557493 PMCID: PMC9784915 DOI: 10.3390/mi13122194] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 12/07/2022] [Accepted: 12/08/2022] [Indexed: 06/17/2023]
Abstract
The paper presents development and characterization of a new bioanalytical test system for rapid detection of lipopolysaccharide (LPS) and whole cells of Francisella tularensis, a causative agent of tularemia, in water samples. Gold nanoparticles (AuNPs) coated by the obtained anti-LPS monoclonal antibodies were used for the assay. Their contact with antigen in tested samples leads to aggregation with a shift of absorption spectra from red to blue. Photometric measurements at 530 nm indicated the analyte presence. Three preparations of AuNPs with different diameters were compared, and the AuNPs having average diameter of 34 nm were found to be optimal. The assay is implemented in 20 min and is characterized by detection limits equal to 40 ng/mL for LPS and 3 × 104 CFU/mL for whole cells of F. tularensis. Thus, the proposed simple one-step assay integrates sensitivity comparable with other immunoassay of microorganisms and rapidity. Selectivity of the assay for different strains of F. tularensis was tested and the possibility to choose its variants with the use of different antibodies to distinguish virulent and non-virulent strains or to detect both kinds of F. tularensis was found. The test system has been successfully implemented to reveal the analyte in natural and tap water samples without the loss of sensitivity.
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Affiliation(s)
- Nadezhda A. Byzova
- A.N. Bach Institute of Biochemistry, Research Center of Biotechnology, Russian Academy of Sciences, 119071 Moscow, Russia
| | - Anatoly V. Zherdev
- A.N. Bach Institute of Biochemistry, Research Center of Biotechnology, Russian Academy of Sciences, 119071 Moscow, Russia
| | - Alexey A. Gorbatov
- State Research Center for Applied Microbiology and Biotechnology, 142279 Obolensk, Russia
| | - Anton G. Shevyakov
- State Research Center for Applied Microbiology and Biotechnology, 142279 Obolensk, Russia
| | - Sergey F. Biketov
- State Research Center for Applied Microbiology and Biotechnology, 142279 Obolensk, Russia
| | - Boris B. Dzantiev
- A.N. Bach Institute of Biochemistry, Research Center of Biotechnology, Russian Academy of Sciences, 119071 Moscow, Russia
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4
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Song X, Wang H, Xu X. Amikacin- and AuNP-mediated colorimetric biosensor for the rapid and sensitive detection of bacteria. Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2022.114189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Kim DM, Yoo SM. Colorimetric Systems for the Detection of Bacterial Contamination: Strategy and Applications. BIOSENSORS 2022; 12:bios12070532. [PMID: 35884335 PMCID: PMC9313054 DOI: 10.3390/bios12070532] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Revised: 07/10/2022] [Accepted: 07/13/2022] [Indexed: 12/19/2022]
Abstract
Bacterial contamination is a public health concern worldwide causing enormous social and economic losses. For early diagnosis and adequate management to prevent or treat pathogen-related illnesses, extensive effort has been put into the development of pathogenic bacterial detection systems. Colorimetric sensing systems have attracted increasing attention due to their simple and single-site operation, rapid signal readout with the naked eye, ability to operate without external instruments, portability, compact design, and low cost. In this article, recent trends and advances in colorimetric systems for the detection and monitoring of bacterial contamination are reviewed. This article focuses on pathogen detection strategies and technologies based on reaction factors that affect the color change for visual readout. Reactions used in each strategy are introduced by dividing them into the following five categories: external pH change-induced pH indicator reactions, intracellular enzyme-catalyzed chromogenic reactions, enzyme-like nanoparticle (NP)-catalyzed substrate reactions, NP aggregation-based reactions, and NP accumulation-based reactions. Some recently developed colorimetric systems are introduced, and their challenges and strategies to improve the sensing performance are discussed.
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Affiliation(s)
- Dong-Min Kim
- Center for Applied Life Science, Hanbat National University, Daejeon 34158, Korea;
| | - Seung-Min Yoo
- School of Integrative Engineering, Chung-Ang University, Seoul 06974, Korea
- Correspondence:
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Huang F, Zhang Y, Lin J, Liu Y. Biosensors Coupled with Signal Amplification Technology for the Detection of Pathogenic Bacteria: A Review. BIOSENSORS 2021; 11:190. [PMID: 34207580 PMCID: PMC8227973 DOI: 10.3390/bios11060190] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Revised: 06/04/2021] [Accepted: 06/06/2021] [Indexed: 12/18/2022]
Abstract
Foodborne disease caused by foodborne pathogens is a very important issue in food safety. Therefore, the rapid screening and sensitive detection of foodborne pathogens is of great significance for ensuring food safety. At present, many research works have reported the application of biosensors and signal amplification technologies to achieve the rapid and sensitive detection of pathogenic bacteria. Thus, this review summarized the use of biosensors coupled with signal amplification technology for the detection of pathogenic bacteria, including (1) the development, concept, and principle of biosensors; (2) types of biosensors, such as electrochemical biosensors, optical biosensors, microfluidic biosensors, and so on; and (3) different kinds of signal amplification technologies applied in biosensors, such as enzyme catalysis, nucleic acid chain reaction, biotin-streptavidin, click chemistry, cascade reaction, nanomaterials, and so on. In addition, the challenges and future trends for pathogenic bacteria based on biosensor and signal amplification technology were also discussed and summarized.
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Affiliation(s)
- Fengchun Huang
- Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;
| | - Yingchao Zhang
- College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, China; (Y.Z.); (J.L.)
| | - Jianhan Lin
- College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, China; (Y.Z.); (J.L.)
| | - Yuanjie Liu
- College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, China; (Y.Z.); (J.L.)
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7
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Mi F, Guan M, Hu C, Peng F, Sun S, Wang X. Application of lectin-based biosensor technology in the detection of foodborne pathogenic bacteria: a review. Analyst 2021; 146:429-443. [DOI: 10.1039/d0an01459a] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Foodborne diseases caused by pathogenic bacteria pose a serious threat to human health.
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Affiliation(s)
- Fang Mi
- College of Chemistry and Chemical Engineering
- Xinjiang normal University
- Urumqi
- China
- Xinjiang bingtuan Xingxin Vocational and Technical College
| | - Ming Guan
- College of Chemistry and Chemical Engineering
- Xinjiang normal University
- Urumqi
- China
| | - Cunming Hu
- College of Chemistry and Chemical Engineering
- Xinjiang normal University
- Urumqi
- China
| | - Fei Peng
- College of Chemistry and Chemical Engineering
- Xinjiang normal University
- Urumqi
- China
| | - Shijiao Sun
- College of Chemistry and Chemical Engineering
- Xinjiang normal University
- Urumqi
- China
| | - Xiaomei Wang
- College of Chemistry and Chemical Engineering
- Xinjiang normal University
- Urumqi
- China
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8
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Capecchi E, Piccinino D, Tomaino E, Bizzarri BM, Polli F, Antiochia R, Mazzei F, Saladino R. Lignin nanoparticles are renewable and functional platforms for the concanavalin a oriented immobilization of glucose oxidase-peroxidase in cascade bio-sensing. RSC Adv 2020; 10:29031-29042. [PMID: 35520043 PMCID: PMC9055843 DOI: 10.1039/d0ra04485g] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Accepted: 07/23/2020] [Indexed: 12/23/2022] Open
Abstract
Lignin nanoparticles (LNPs) acted as a renewable and efficient platform for the immobilization of horseradish peroxidase (HRP) and glucose oxidase (GOX) by a layer by layer procedure. The use of concanavalin A as a molecular spacer ensured the correct orientation and distance between the two enzymes as confirmed by Förster resonance energy transfer measurement. Layers with different chemo–physical properties tuned in a different way the activity and kinetic parameters of the enzymatic cascade, with cationic lignin performing as the best polyelectrolyte in the retention of the optimal Con A aggregation state. Electrochemical properties, temperature and pH stability, and reusability of the novel systems have been studied, as well as their capacity to perform as colorimetric biosensors in the detection of glucose using ABTS and dopamine as chromogenic substrates. A boosting effect of LNPs was observed during cyclovoltammetry analysis. The limit of detection (LOD) was found to be better than, or comparable to, that previously reported for other HRP–GOX immobilized systems, the best results being again obtained in the presence of a cationic lignin polyelectrolyte. Thus renewable lignin platforms worked as smart and functional devices for the preparation of green biosensors in the detection of glucose. Lignin nanoparticles as functional renewable nanoplatform for the immobilization of cascade process in colorimetric biosensing of β-d-glucose.![]()
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Affiliation(s)
- Eliana Capecchi
- Department of Biological and Ecological Sciences (DEB), University of Tuscia via S. Camillo de Lellis 01100 Viterbo Italy
| | - Davide Piccinino
- Department of Biological and Ecological Sciences (DEB), University of Tuscia via S. Camillo de Lellis 01100 Viterbo Italy
| | - Elisabetta Tomaino
- Department of Biological and Ecological Sciences (DEB), University of Tuscia via S. Camillo de Lellis 01100 Viterbo Italy
| | - Bruno Mattia Bizzarri
- Department of Biological and Ecological Sciences (DEB), University of Tuscia via S. Camillo de Lellis 01100 Viterbo Italy
| | - Francesca Polli
- Department of Chemistry and Drug Technologies, Sapienza University of Rome P.le Aldo Moro 5 Rome 00185 Italy
| | - Riccarda Antiochia
- Department of Chemistry and Drug Technologies, Sapienza University of Rome P.le Aldo Moro 5 Rome 00185 Italy
| | - Franco Mazzei
- Department of Chemistry and Drug Technologies, Sapienza University of Rome P.le Aldo Moro 5 Rome 00185 Italy
| | - Raffaele Saladino
- Department of Biological and Ecological Sciences (DEB), University of Tuscia via S. Camillo de Lellis 01100 Viterbo Italy
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Yang H, Xiao M, Lai W, Wan Y, Li L, Pei H. Stochastic DNA Dual-Walkers for Ultrafast Colorimetric Bacteria Detection. Anal Chem 2020; 92:4990-4995. [PMID: 32164404 DOI: 10.1021/acs.analchem.9b05149] [Citation(s) in RCA: 58] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Rapid, sensitive, and reliable pathogen detection is growing in importance in human health and safety. In this work, we report a stochastic DNA dual-walker-based colorimetric biosensor for bacterial detection. In the presence of target bacteria, two kinds of released multiple walking strands are allowed for continuous walking on the Au nanoparticle (AuNP)-based 3D track, resulting in destabilized aggregation of AuNP-based probes. The induced color change from red to blue can serve as an analytical signal for colorimetric detection of target bacteria. We demonstrated that this mothed enables sensitive and specific bacterial detection within 15 min due to its ultrafast reaction kinetics and sensitive color change, showing a linear response ranging from 100 to 105 CFU/mL with a limit of detection of 1 CFU/mL. Moreover, we also realized analysis of practical samples using this colorimetric biosensor. Given its features of rapid, sensitive, specific, and reliable analysis, our stochastic dual-walker-based colorimetric biosensor shows much promise in point-of-care testing for bacteria detection.
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Affiliation(s)
- Haihong Yang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, China
| | - Mingshu Xiao
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, China
| | - Wei Lai
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, China
| | - Ying Wan
- School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Li Li
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, China
| | - Hao Pei
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, China
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Abstract
Bio-desulfurization is an efficient technology for removing recalcitrant sulfur derivatives from liquid fuel oil in environmentally friendly experimental conditions. In this context, the development of heterogeneous bio-nanocatalysts is of great relevance to improve the performance of the process. Here we report that lignin nanoparticles functionalized with concanavalin A are a renewable and efficient platform for the layer-by-layer immobilization of horseradish peroxidase. The novel bio-nanocatalysts were applied for the oxidation of dibenzothiophene as a well-recognized model of the recalcitrant sulfur derivative. The reactions were performed with hydrogen peroxide as a green primary oxidant in the biphasic system PBS/n-hexane at 45 °C and room pressure, the highest conversion of the substrate occurring in the presence of cationic polyelectrolyte layer and hydroxy-benzotriazole as a low molecular weight redox mediator. The catalytic activity was retained for more transformations highlighting the beneficial effect of the support in the reusability of the heterogeneous system.
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Huang J, Sun J, Warden AR, Ding X. Colorimetric and photographic detection of bacteria in drinking water by using 4-mercaptophenylboronic acid functionalized AuNPs. Food Control 2020. [DOI: 10.1016/j.foodcont.2019.106885] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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He S, Hong X, Zhang M, Wu L, Yan X. Label-Free Detection of Bacteria in Fruit Juice by Nano-Flow Cytometry. Anal Chem 2019; 92:2393-2400. [PMID: 31820949 DOI: 10.1021/acs.analchem.9b01869] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Rapid quantification of microbial contamination in fruit juice is highly desired for food safety control. Yet, the complex sample matrix and the diversity of bacterial contaminants present a great challenge. Employing a laboratory-built nano-flow cytometer (nFCM), here we report the development of a label-free approach for the detection of bacteria population in fruit juice. The weak autofluorescence of bacterial cells was used as a hallmark for the identification of bacteria. The sample pretreatment protocol was optimized to reduce fluorescence background, lyse residual plant cells and debris, and attain a good recovery of bacteria from juice samples. It was demonstrated that the nFCM was able to enumerate individual bacteria of very weak autofluorescence, and a clear differentiation from residual juice particulates was achieved. For bacteria spiked in the orange juice, the recovery rate was around 95% and a linear correlation between nFCM analysis and plate counting was acquired in the range of 3 × 104 to 3 × 108 cfu/mL. The assay, including sample pretreatment and instrument analysis, can be accomplished within 1 h, which is far more efficient than plate counting. Using a 40 mL sample volume, the detection limit in apple juice was ∼102 cells/mL. The as-developed method was successfully applied to bacterial measurement of freshly made orange juice and apple juice purchased from grocery stores. We believe it could also have potential practical application in microbial control analysis of other juices and water.
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Affiliation(s)
- Shengbin He
- MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, Key Laboratory for Chemical Biology of Fujian Province, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemical Biology, College of Chemistry and Chemical Engineering , Xiamen University , Xiamen , Fujian 361005 , P. R. China
| | - Xinyi Hong
- MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, Key Laboratory for Chemical Biology of Fujian Province, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemical Biology, College of Chemistry and Chemical Engineering , Xiamen University , Xiamen , Fujian 361005 , P. R. China
| | - Miaomiao Zhang
- MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, Key Laboratory for Chemical Biology of Fujian Province, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemical Biology, College of Chemistry and Chemical Engineering , Xiamen University , Xiamen , Fujian 361005 , P. R. China
| | - Lina Wu
- MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, Key Laboratory for Chemical Biology of Fujian Province, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemical Biology, College of Chemistry and Chemical Engineering , Xiamen University , Xiamen , Fujian 361005 , P. R. China
| | - Xiaomei Yan
- MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, Key Laboratory for Chemical Biology of Fujian Province, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemical Biology, College of Chemistry and Chemical Engineering , Xiamen University , Xiamen , Fujian 361005 , P. R. China
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13
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He K, Li Z, Wang L, Fu Y, Quan H, Li Y, Wang X, Gunasekaran S, Xu X. A Water-Stable Luminescent Metal-Organic Framework for Rapid and Visible Sensing of Organophosphorus Pesticides. ACS APPLIED MATERIALS & INTERFACES 2019; 11:26250-26260. [PMID: 31251555 DOI: 10.1021/acsami.9b06151] [Citation(s) in RCA: 71] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Metal-organic frameworks (MOFs) have shown considerable prospects for sensing pesticide residues. However, the low stability of MOFs in water hinders them from testing food and environmental samples. Herein, we report an easy and cost-efficient synthesis of a water-stable zirconium luminescent MOF (Zr-LMOF) and its application for rapid, sensitive, and in situ detection of organophosphorous pesticides (OPPs). The Zr-MOF is prepared using Zr(IV) and 1,2,4,5-tetrakis(4-carboxyphenyl)benzene. The synthesized Zr-LMOF rapidly absorbs trace amounts of OPP parathion-methyl and indicates its presence. A low limit of detection of 0.115 μg kg-1 (0.438 nM) with a wide linear range from 70 μg kg-1 to 5.0 mg kg-1 was achieved. Satisfactory recoveries ranging from 78% to 107% were obtained for spiked food and environmental samples. Further, the Zr-LMOF was applied to imitate rapid and in situ imaging detection of pesticide residue on fresh produce nondestructively; visual signals appeared under ultraviolet light within 5 min. These results suggest that the Zr-LMOF has the potential for low-cost, rapid, and in situ imaging detection of OPPs contamination via easy-to-read visual signal.
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Affiliation(s)
- Kaiyu He
- State Key Laboratory for Quality and Safety of Agro-products , Zhejiang Academy of Agricultural Sciences , Hangzhou 310021 , China
| | - Zhishang Li
- College of Biosystems Engineering and Food Science , Zhejiang University , Hangzhou 310058 , China
| | - Liu Wang
- State Key Laboratory for Quality and Safety of Agro-products , Zhejiang Academy of Agricultural Sciences , Hangzhou 310021 , China
| | - Yingchun Fu
- College of Biosystems Engineering and Food Science , Zhejiang University , Hangzhou 310058 , China
| | - Haoran Quan
- State Key Laboratory for Quality and Safety of Agro-products , Zhejiang Academy of Agricultural Sciences , Hangzhou 310021 , China
| | - Yanbin Li
- College of Biosystems Engineering and Food Science , Zhejiang University , Hangzhou 310058 , China
| | - Xinquan Wang
- State Key Laboratory for Quality and Safety of Agro-products , Zhejiang Academy of Agricultural Sciences , Hangzhou 310021 , China
| | - Sundaram Gunasekaran
- Department of Biological Systems Engineering , University of Wisconsin-Madison , 460 Henry Mall , Madison , Wisconsin 53706 , United States
| | - Xiahong Xu
- State Key Laboratory for Quality and Safety of Agro-products , Zhejiang Academy of Agricultural Sciences , Hangzhou 310021 , China
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Shin C, Lee HN, Ryu JS, Chung HJ. Rapid naked-eye detection of Gram-positive bacteria by vancomycin-based nano-aggregation. RSC Adv 2018; 8:25094-25103. [PMID: 35542172 PMCID: PMC9082569 DOI: 10.1039/c8ra03540g] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2018] [Accepted: 06/26/2018] [Indexed: 12/16/2022] Open
Abstract
Development of a rapid, point-of-care assay for diagnosing bacterial infections is crucial for subsequent treatment of the patient and preventing the overuse of antibiotics. Herein, we describe a rapid, one-step colorimetric assay based on the formation of nano-aggregates using nanobeads targeting Gram-positive bacteria. Vancomycin was immobilized onto blue-colored polymeric nanobeads to induce specific and multivalent binding with the Gram-positive bacterial cell wall and subsequent agglomeration. Without any pre-processing steps, the addition of various types of Gram-positive pathogens to the nanobeads resulted in the formation of blue precipitates, which could be observed with the naked eye in ∼30 min. We also utilized a porous filter system for the assay, which allowed discrimination of Gram-positive targets with higher selectivity, and demonstrated feasibility as a simple diagnostic assay with minimal technical components. We anticipate that the nanobead aggregation assay can be potentially applied as a rapid and simple sensing platform, which can be easily miniaturized and enable point-of-care diagnosis of Gram-positive infections. A rapid, colorimetric assay based on aggregation of nanobeads functionalized with vancomycin is developed for naked-eye detection of Gram-positive bacteria.![]()
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Affiliation(s)
- Cheong Shin
- Graduate School of Nanoscience and Technology
- Korea Advanced Institute of Science and Technology
- Daejeon
- Korea
| | - Ha Neul Lee
- Graduate School of Nanoscience and Technology
- Korea Advanced Institute of Science and Technology
- Daejeon
- Korea
| | - Jea Sung Ryu
- Graduate School of Nanoscience and Technology
- Korea Advanced Institute of Science and Technology
- Daejeon
- Korea
| | - Hyun Jung Chung
- Graduate School of Nanoscience and Technology
- Korea Advanced Institute of Science and Technology
- Daejeon
- Korea
- Department of Biological Sciences
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