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Wu X, He Y, Fu J, Zhao Y. Study on Electrochemical Behaviors of Heat-Treated Escherichia coli and Staphylococcus aureus. ACS OMEGA 2024; 9:44907-44915. [PMID: 39554440 PMCID: PMC11561634 DOI: 10.1021/acsomega.4c00756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/25/2024] [Revised: 07/26/2024] [Accepted: 10/16/2024] [Indexed: 11/19/2024]
Abstract
Evaluating the bacterial activity effectively is critical to addressing the challenges posed by bacterial infections. Electrochemistry offers significant advantages in accuracy and cost efficiency compared with methods that are more time-consuming or require expensive instrumentation. This study initially established an electrochemical method for detecting bacterial activity using heat treatment as the pretreatment step. Subsequent optimization of the heat treatment and detection conditions further enhanced the method efficiency. The detection results of Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) under different heating conditions showed that the peak current values of E. coli and S. aureus were the highest after heating at 50 °C for 15 min. The dynamic changes in the electrochemical signals from the heat-treated bacteria with alteration in heating conditions were indicated to be related to the effects of heating on the external structure and purine metabolism of the bacterial cells. Although heat-treated E. coli and S. aureus exhibited similar peak potentials, different substances were observed to have contributed to these potentials. A positive linear correlation was observed between the peak current and bacterial concentration. Compared to the plate counting method, the electrochemical method detected the activity changes in E. coli and S. aureus from the logarithmic to the stationary phase earlier. The findings support the broad application of electrochemical methods in microbial detection and provide valuable insights into the purine metabolism of heat-stressed bacteria.
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Affiliation(s)
- Xiaofan Wu
- College of
Chemistry and Pharmacy, Jiamusi University, Jiamusi 154007, China
| | - Yupo He
- College of
Chemistry and Pharmacy, Jiamusi University, Jiamusi 154007, China
| | - Jiaqi Fu
- College of
Chemistry and Pharmacy, Jiamusi University, Jiamusi 154007, China
- Heilongjiang
Provincial Key Laboratory of New Drug Development and Pharmacotoxicological
Evaluation, College of Pharmacy, Jiamusi
University, Jiamusi 154007, China
| | - Yanli Zhao
- College of
Chemistry and Pharmacy, Jiamusi University, Jiamusi 154007, China
- Heilongjiang
Provincial Key Laboratory of New Drug Development and Pharmacotoxicological
Evaluation, College of Pharmacy, Jiamusi
University, Jiamusi 154007, China
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Han K, Jiang B, Tong Y, Zhang W, Zou X, Shi J, Su X. Flexible-fabricated sensor module with programmable magnetic actuators coupled to L-cysteine functionalized Ag@Fe 3O 4 complexes for Cu 2+ detection in fish tissues. Biomed Microdevices 2023; 25:15. [PMID: 37036608 DOI: 10.1007/s10544-023-00654-2] [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] [Accepted: 03/18/2023] [Indexed: 04/11/2023]
Abstract
Heavy metal contamination for seafood, particularly fish, is arising great concerns, and consequentially it is necessary to develop a simple and direct detection method. In this work, Ag@Fe3O4 is successfully prepared by simple solvothermal method, and we present a flexible-fabricated sensor module with assembled programmable magnetic actuators. The resulting sensor integrates a three-electrode system with two programmable magnetic actuators at the bottom of the device, which regulates the amount of current by adjusting the brake to control the adsorption force and vibration. The L-Cysteine functionalized Ag@Fe3O4 is coated on the surface of the electrode, then the Cu2+ is dropped into the reaction tank. Its performance is studied by cyclic voltammetry and electrochemical impedance spectroscopy, and the key experimental conditions such as deposition potential, deposition time, and electrolyte pH are gradually optimized. Under optimal conditions, Cu2+ can be detected over a wide linear range (0.01 ~ 4 μM) and at a low LOD (0.34 nM). The results show that the proposed method has a good application prospect in the detection of Cu2+. This method is successfully applied to Cu2+ analysis in fish samples with an acceptable recovery of 93 ~ 102%.
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Grants
- 32102080,31801631,31671844,1601360061 National Natural Science Foundation of China
- 32102080,31801631,31671844,1601360061 National Natural Science Foundation of China
- 32102080,31801631,31671844,1601360061 National Natural Science Foundation of China
- 32102080,31801631,31671844,1601360061 National Natural Science Foundation of China
- 32102080,31801631,31671844,1601360061 National Natural Science Foundation of China
- 32102080,31801631,31671844,1601360061 National Natural Science Foundation of China
- 32102080,31801631,31671844,1601360061 National Natural Science Foundation of China
- BK20160506,bk20180865 Natural Science Foundation of Jiangsu Province
- BK20160506,bk20180865 Natural Science Foundation of Jiangsu Province
- BK20160506,bk20180865 Natural Science Foundation of Jiangsu Province
- BK20160506,bk20180865 Natural Science Foundation of Jiangsu Province
- BK20160506,bk20180865 Natural Science Foundation of Jiangsu Province
- BK20160506,bk20180865 Natural Science Foundation of Jiangsu Province
- BK20160506,bk20180865 Natural Science Foundation of Jiangsu Province
- KYCX21_3395 Post-graduate Research&Practice Innovation Program of Jiangsu Province
- KYCX21_3395 Post-graduate Research&Practice Innovation Program of Jiangsu Province
- KYCX21_3395 Post-graduate Research&Practice Innovation Program of Jiangsu Province
- KYCX21_3395 Post-graduate Research&Practice Innovation Program of Jiangsu Province
- KYCX21_3395 Post-graduate Research&Practice Innovation Program of Jiangsu Province
- KYCX21_3395 Post-graduate Research&Practice Innovation Program of Jiangsu Province
- KYCX21_3395 Post-graduate Research&Practice Innovation Program of Jiangsu Province
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Affiliation(s)
- Kuiguo Han
- Department of Food & Biological Engineering, Jiangsu University, Zhenjiang, 212013, China
| | - Bin Jiang
- Department of Mechanical Engineering, Jiangsu University, Zhenjiang, 212013, China
| | - Yanqun Tong
- Department of Mechanical Engineering, Jiangsu University, Zhenjiang, 212013, China
| | - Wen Zhang
- Department of Food & Biological Engineering, Jiangsu University, Zhenjiang, 212013, China
| | - Xiaobo Zou
- Department of Food & Biological Engineering, Jiangsu University, Zhenjiang, 212013, China.
| | - Jiyong Shi
- Department of Food & Biological Engineering, Jiangsu University, Zhenjiang, 212013, China
| | - Xiaoyu Su
- Department of Food & Biological Engineering, Jiangsu University, Zhenjiang, 212013, China
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Zhang X, Hou X, Ma L, Shi Y, Zhang D, Qu K. Analytical methods for assessing antimicrobial activity of nanomaterials in complex media: advances, challenges, and perspectives. J Nanobiotechnology 2023; 21:97. [PMID: 36941596 PMCID: PMC10026445 DOI: 10.1186/s12951-023-01851-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Accepted: 03/07/2023] [Indexed: 03/23/2023] Open
Abstract
Assessing the antimicrobial activity of engineered nanomaterials (ENMs), especially in realistic scenarios, is of great significance for both basic research and applications. Multiple analytical methods are available for analysis via off-line or on-line measurements. Real-world samples are often complex with inorganic and organic components, which complicates the measurements of microbial viability and/or metabolic activity. This article highlights the recent advances achieved in analytical methods including typical applications and specifics regarding their accuracy, cost, efficiency, and user-friendliness. Methodological drawbacks, technique gaps, and future perspectives are also discussed. This review aims to help researchers select suitable methods for gaining insight into antimicrobial activities of targeted ENMs in artificial and natural complex matrices.
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Affiliation(s)
- Xuzhi Zhang
- Laboratory for Marine Fisheries Science and Food Production Processes, Pilot National Laboratory for Marine Science and Technology, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, 266071, China
| | - Xiangyi Hou
- School of Marine Ecology and Environment, Shanghai Ocean University, Shanghai, 201306, China
- Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao, 266100, China
| | - Liangyu Ma
- Laboratory for Marine Fisheries Science and Food Production Processes, Pilot National Laboratory for Marine Science and Technology, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, 266071, China
| | - Yaqi Shi
- Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao, 266100, China
| | - Dahai Zhang
- Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao, 266100, China.
| | - Keming Qu
- Laboratory for Marine Fisheries Science and Food Production Processes, Pilot National Laboratory for Marine Science and Technology, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, 266071, China.
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A Detection Method for Crop Fungal Spores Based on Microfluidic Separation Enrichment and AC Impedance Characteristics. J Fungi (Basel) 2022; 8:jof8111168. [DOI: 10.3390/jof8111168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Revised: 10/27/2022] [Accepted: 10/27/2022] [Indexed: 11/09/2022] Open
Abstract
The timely monitoring of airborne crop fungal spores is important for maintaining food security. In this study, a method based on microfluidic separation and enrichment and AC impedance characteristics was proposed to detect spores of fungal pathogens that cause diseases on crops. Firstly, a microfluidic chip with tertiary structure was designed for the direct separation and enrichment of Ustilaginoidea virens spores, Magnaporthe grisea spores, and Aspergillus niger spores from the air. Then, the impedance characteristics of fungal spores were measured by impedance analyzer in the enrichment area of a microfluidic chip. The impedance characteristics of fungal spores were analyzed, and four impedance characteristics were extracted: absolute value of impedance (abs), real part of impedance (real), imaginary part of impedance (imag), and impedance phase (phase). Finally, based on the impedance characteristics of extracted fungal spores, K-proximity (KNN), random forest (RF), and support vector machine (SVM) classification models were established to classify the three fungal spores. The results showed that the microfluidic chip designed in this study could well collect the spores of three fungal diseases, and the collection rate was up to 97. The average accuracy of KNN model, RF model, and SVM model for the detection of three disease spores was 93.33, 96.44 and 97.78, respectively. The F1-Score of KNN model, RF model, and SVM model was 90, 94.65, and 96.18, respectively. The accuracy, precision, recall, and F1-Score of the SVM model were all the highest, at 97.78, 96.67, 96.69, and 96.18, respectively. Therefore, the detection method of crop fungal spores based on microfluidic separation, enrichment, and impedance characteristics proposed in this study can be used for the detection of airborne crop fungal spores, providing a basis for the subsequent detection of crop fungal spores.
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Recent advances of integrated microfluidic systems for fungal and bacterial analysis. Trends Analyt Chem 2022. [DOI: 10.1016/j.trac.2022.116850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Zhang Z, Li X, Tian J, Chen J, Gao G. A review: Application and research progress of bioimpedance in meat quality inspection. J FOOD PROCESS ENG 2022. [DOI: 10.1111/jfpe.14153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ziyi Zhang
- Beijing Laboratory of Food Quality and Safety, College of Information and Electrical Engineering China Agricultural University Beijing People's Republic of China
| | - Xinxing Li
- Beijing Laboratory of Food Quality and Safety, College of Information and Electrical Engineering China Agricultural University Beijing People's Republic of China
| | - Jianjun Tian
- College of Food Science and Engineering Inner Mongolia Agricultural University Hohhot People's Republic of China
| | - Jing Chen
- School of Logistics Beijing Wuzi University Beijing People's Republic of China
| | - Ge Gao
- School of Logistics Beijing Wuzi University Beijing People's Republic of China
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