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Mostajabodavati S, Mousavizadegan M, Hosseini M, Mohammadimasoudi M, Mohammadi J. Machine learning-assisted liquid crystal-based aptasensor for the specific detection of whole-cell Escherichia coli in water and food. Food Chem 2024; 448:139113. [PMID: 38552467 DOI: 10.1016/j.foodchem.2024.139113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2023] [Revised: 03/19/2024] [Accepted: 03/20/2024] [Indexed: 04/24/2024]
Abstract
We have developed a rapid, facile liquid crystal (LC)-based aptasensor for E. coli detection in water and juice samples. A textile grid-anchored LC platform was used with specific aptamers adsorbed via a cationic surfactant, cetyltrimethylammonium bromide (CTAB), on the LC surface. The presence of E. coli dissociates the aptamers from CTAB and restores the dark signal induced by the surfactant. Using polarized microscopy, the images of the LCs in the presence of various concentrations of E. coli were captured and analyzed using image analysis and machine learning (ML). The artificial neural networks (ANN) and extreme gradient boosting (XGBoost) rendered the best results for water samples (R2 = 0.986 and RMSE = 0.209) and juice samples (R2 = 0.976 and RMSE = 0.262), respectively. The platform was able to detect E. coli with a detection limit (LOD) of 6 CFU mL-1.
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Affiliation(s)
- Saba Mostajabodavati
- Nanobiosensors Lab, Department of Life Science Engineering, Faculty of New Sciences and Technologies, University of Tehran, Tehran 1439817435, Iran
| | - Maryam Mousavizadegan
- Nanobiosensors Lab, Department of Life Science Engineering, Faculty of New Sciences and Technologies, University of Tehran, Tehran 1439817435, Iran
| | - Morteza Hosseini
- Nanobiosensors Lab, Department of Life Science Engineering, Faculty of New Sciences and Technologies, University of Tehran, Tehran 1439817435, Iran; Department of Pharmaceutical Biomaterials, Medical Biomaterials Research Center, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran.
| | - Mohammad Mohammadimasoudi
- Nano-bio-photonics Laboratory, Faculty of New Sciences and Technologies, University of Tehran, Tehran 1439817435, Iran
| | - Javad Mohammadi
- Department of Life Science Engineering, Faculty of New Sciences and Technologies, University of Tehran, Tehran 1439817435, Iran
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Abdelshafy AM, Neetoo H, Al-Asmari F. Antimicrobial Activity of Hydrogen Peroxide for Application in Food Safety and COVID-19 Mitigation: An Updated Review. J Food Prot 2024; 87:100306. [PMID: 38796115 DOI: 10.1016/j.jfp.2024.100306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Revised: 05/17/2024] [Accepted: 05/20/2024] [Indexed: 05/28/2024]
Abstract
Hydrogen peroxide (H2O2) is a well-known agent with a broad-spectrum antimicrobial activity against pathogenic bacteria, fungi, and viruses. It is a colorless liquid and commercially available in aqueous solution over a wide concentration range. It has been extensively used in the food industry by virtue of its strong oxidizing property and its ability to cause cellular oxidative damage in microbial cells. This review comprehensively documents recent research on the antimicrobial activity of H2O2 against organisms of concern for the food industry, as well as its effect against SARS-CoV-2 responsible for the COVID-19 pandemic. In addition, factors affecting the antimicrobial effectiveness of H2O2, different applications of H2O2 as a sanitizer or disinfectant in the food industry as well as safety concerns associated with H2O2 are discussed. Finally, recent efforts in enhancing the antimicrobial efficacy of H2O2 are also outlined.
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Affiliation(s)
- Asem M Abdelshafy
- Department of Food Science and Technology, Faculty of Agriculture, Al-Azhar University - Assiut Branch, Assiut 71524, Egypt.
| | - Hudaa Neetoo
- Agricultural and Food Science Department, Faculty of Agriculture, University of Mauritius, Reduit, Mauritius.
| | - Fahad Al-Asmari
- Department of Food Science and Nutrition, College of Agriculture and Food Sciences, King Faisal University, Al-Ahsa 31982, Saudi Arabia.
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Wang C, Liu A, Chen J, Liu S, Wei W. Sensitive detection of PARP-1 activity by electrochemical impedance spectroscopy based on biomineralization. Anal Chim Acta 2023; 1249:340937. [PMID: 36868772 DOI: 10.1016/j.aca.2023.340937] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Revised: 01/27/2023] [Accepted: 02/02/2023] [Indexed: 02/08/2023]
Abstract
Poly(ADP)ribose polymerase-1 (PARP-1) has attracted much attention as a tumor marker in recent years. Based on the large negative charge and hyperbranched structure of PARP-1 amplified products (PAR), many detection methods have been established. Herein, we proposed a label-free electrochemical impedance detection method based on the large amount of phosphate groups (PO43-) on the surface of PAR. Although EIS method has high sensitivity, it is not sensitive enough to discern PAR effectively. Therefore, biomineralization was incorporated to increase the resistance value (Rct) distinctly because of the poor electrical conductivity of CaP. During biomineralization process, plentiful Ca2+ was captured by PO43- of PAR through electrostatic interaction, resulting in an increasing Rct of modified ITO electrode. In contrast, when PRAP-1 was absent, only a little Ca2+ was adsorbed on the phosphate backbone of the activating dsDNA. As a result, the biomineralization effect was slight and only a negligible Rct change occurred. Experiment results showed that Rct was associated closely with the activity of PARP-1. There was a linear correlation between them when the activity value was in the range of 0.005-1.0 U. The calculated detection limit was 0.003 U. Results of real samples detection and the recovery experiments were satisfactory, indicating the method has an excellent application prospect.
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Affiliation(s)
- Chenchen Wang
- Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device, State Key Laboratory of Bioelectronics, Key Laboratory of Environmental Medicine Engineering of Ministry of Education, School of Chemistry and Chemical Engineering, Southeast University, Nanjing, 211189, China
| | - Anran Liu
- Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device, State Key Laboratory of Bioelectronics, Key Laboratory of Environmental Medicine Engineering of Ministry of Education, School of Chemistry and Chemical Engineering, Southeast University, Nanjing, 211189, China
| | - Jin Chen
- The Key Laboratory of Modern Toxicology of Ministry of Education, Nanjing Medical University, Nanjing, 211166, Jiangsu, China
| | - Songqin Liu
- Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device, State Key Laboratory of Bioelectronics, Key Laboratory of Environmental Medicine Engineering of Ministry of Education, School of Chemistry and Chemical Engineering, Southeast University, Nanjing, 211189, China
| | - Wei Wei
- Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device, State Key Laboratory of Bioelectronics, Key Laboratory of Environmental Medicine Engineering of Ministry of Education, School of Chemistry and Chemical Engineering, Southeast University, Nanjing, 211189, China.
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Cheng L, Jin R, Jiang D, Zhuang J, Liao X, Zheng Q. Scanning Electrochemical Cell Microscopy Platform with Local Electrochemical Impedance Spectroscopy. Anal Chem 2021; 93:16401-16408. [PMID: 34843214 DOI: 10.1021/acs.analchem.1c02972] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Local electrochemical impedance spectroscopy (LEIS) has been a versatile technology for characterizing local complex electrochemical processes at heterogeneous surfaces. However, further application of this technology is restricted by its poor spatial resolution. In this work, high-spatial-resolution LEIS was realized using scanning electrochemical cell microscopy (SECCM-LEIS). The spatial resolution was proven to be ∼180 nm based on experimental and simulation results. The stability and reliability of this platform were further verified by long-term tests and Kramers-Kronig transformation. With this technology, larger electric double-layer capacitance (Cdl) and smaller interfacial resistance (Rt) were observed at the edges of N-doped reduced graphene oxide, as compared to those at the planar surface, which may be due to the high electrochemical activity at the edges. The established SECCM-LEIS provides a high-spatial approach for study of the interfacial electrochemical behavior of materials, which can contribute to the elucidation of the electrochemical reaction mechanism at material surfaces.
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Affiliation(s)
- Lei Cheng
- Key Laboratory of Education Ministry for Modern Design Rotor-Bearing System, Xi'an Jiaotong University, Xi'an 710049, P.R. China.,School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049, P.R. China
| | - Rong Jin
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu 210023, P.R. China
| | - Dechen Jiang
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu 210023, P.R. China
| | - Jian Zhuang
- Key Laboratory of Education Ministry for Modern Design Rotor-Bearing System, Xi'an Jiaotong University, Xi'an 710049, P.R. China.,School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049, P.R. China
| | - Xiaobo Liao
- Key Laboratory of Education Ministry for Modern Design Rotor-Bearing System, Xi'an Jiaotong University, Xi'an 710049, P.R. China.,School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049, P.R. China.,Key Laboratory of Testing Technology for Manufacturing Process, Ministry of Education, Southwest University of Science and Technology, Mianyang 621010, P.R. China
| | - Qiangqiang Zheng
- Key Laboratory of Education Ministry for Modern Design Rotor-Bearing System, Xi'an Jiaotong University, Xi'an 710049, P.R. China.,School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049, P.R. China
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