1
|
Feng C, Li J, Yang W, Chen Z. Study on the inactivation effect and mechanism of EGCG disinfectant on Bacillus subtilis. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 356:124364. [PMID: 38878811 DOI: 10.1016/j.envpol.2024.124364] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2024] [Revised: 06/06/2024] [Accepted: 06/11/2024] [Indexed: 06/22/2024]
Abstract
The widespread use of chlorine-based disinfectants in drinking water treatment has led to the proliferation of chlorine-resistant bacteria and the risk of disinfection byproducts (DBPs), posing a serious threat to public health. This study aims to explore the effectiveness and potential applications of epigallocatechin gallate (EGCG) against chlorine-resistant Bacillus and its spores in water, providing new insights for the control of chlorine-resistant bacteria and improving the biological stability of distribution systems. The inactivation effects of EGCG on Bacillus subtilis (B. subtilis) and its spores were investigated using transmission electron microscopy, ATP measurement, and transcriptome sequencing analysis to determine changes in surface structure, energy metabolism, and gene expression levels, thereby elucidating the inactivation mechanism. The results demonstrate the potential application of EGCG in continuously inhibiting chlorine-resistant B. subtilis in water, effectively improving the biological stability of the distribution system. However, EGCG is not suitable for treating raw water with high spore content and is more suitable as a supplementary disinfectant for processes with strong spore removal capabilities, such as ozone, ultraviolet, or ultrafiltration. EGCG exhibits a disruptive effect on the morphological structure and energy metabolism of B. subtilis and suppresses the synthesis of substances, energy metabolism, and normal operation of the antioxidant system by inhibiting the expression of multiple genes, thereby achieving the inactivation of B. subtilis.
Collapse
Affiliation(s)
- Cuimin Feng
- Key Laboratory of Urban Stormwater System and Water Environment, Ministry of Education, Beijing University of Civil Engineering and Architecture, Beijing, 100044, China; National Demonstration Center for Experimental Water Environment Education, Beijing University of Civil Engineering and Architecture, Beijing, 100044, China.
| | - Jing Li
- Key Laboratory of Urban Stormwater System and Water Environment, Ministry of Education, Beijing University of Civil Engineering and Architecture, Beijing, 100044, China; National Demonstration Center for Experimental Water Environment Education, Beijing University of Civil Engineering and Architecture, Beijing, 100044, China
| | - Weiqi Yang
- Key Laboratory of Urban Stormwater System and Water Environment, Ministry of Education, Beijing University of Civil Engineering and Architecture, Beijing, 100044, China; National Demonstration Center for Experimental Water Environment Education, Beijing University of Civil Engineering and Architecture, Beijing, 100044, China
| | - Zexin Chen
- Key Laboratory of Urban Stormwater System and Water Environment, Ministry of Education, Beijing University of Civil Engineering and Architecture, Beijing, 100044, China; National Demonstration Center for Experimental Water Environment Education, Beijing University of Civil Engineering and Architecture, Beijing, 100044, China
| |
Collapse
|
2
|
Ying Q, Zhan S, Yu H, Li J, Jia R, Wei H, Roura E, Tan X, Qiao Z, Huang T. Gelatin based preservation technologies on the quality of food: a comprehensive review. Crit Rev Food Sci Nutr 2024:1-18. [PMID: 38850027 DOI: 10.1080/10408398.2024.2361298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2024]
Abstract
Gelatin has played a great potential in food preservation because of its low price and superior film forming characteristics. This review provides a comprehensive overview of the latest research progress and application of gelatin preservation technologies (film, coating, antifreeze peptide, etc.), discussing their preservation mechanisms and efficiency through the viewpoints of quality and shelf life of animal and aquatic products as well as fruits and vegetables. It showed that bioactive and intelligent gelatin-based films exhibit antibacterial, antioxidant, water resistance and pH responsive properties, making them excellent for food preservation. In addition, pH responsive properties of films also intuitively reflect the freshness of food by color. Similarly, gelatin and its hydrolysate can be widely used in antifreeze peptides to reduce the mass loss of food during freezing and extend the shelf life of frozen food. However, extensive works are still required to extend their commercial application values.
Collapse
Affiliation(s)
- Qingfang Ying
- Zhejiang-Malaysia Joint Research Laboratory for Agricultural Product Processing and Nutrition, Ningbo University, Ningbo, China
| | - Shengnan Zhan
- Zhejiang-Malaysia Joint Research Laboratory for Agricultural Product Processing and Nutrition, Ningbo University, Ningbo, China
| | - Haixia Yu
- Ocean Research Centre of Zhoushan, Zhejiang University, Zhoushan, China
| | - Jihua Li
- Key Laboratory of Tropical Crop Products Processing of Ministry of Agriculture and Rural Affairs, Agricultural Products Processing Research Institute, Chinese Academy of Tropical Agricultural Sciences, Zhanjiang, China
| | - Ru Jia
- Zhejiang-Malaysia Joint Research Laboratory for Agricultural Product Processing and Nutrition, Ningbo University, Ningbo, China
| | - Huamao Wei
- Zhejiang-Malaysia Joint Research Laboratory for Agricultural Product Processing and Nutrition, Ningbo University, Ningbo, China
| | - Eugeni Roura
- Centre for Animal Science, Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, Brisbane, Australia
| | - Xinle Tan
- Centre for Animal Science, Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, Brisbane, Australia
- Juxiangyuan Health Food (Zhongshan) Co., Ltd, Zhongshan, China
| | - Zhaohui Qiao
- Zhejiang-Malaysia Joint Research Laboratory for Agricultural Product Processing and Nutrition, Ningbo University, Ningbo, China
| | - Tao Huang
- Zhejiang-Malaysia Joint Research Laboratory for Agricultural Product Processing and Nutrition, Ningbo University, Ningbo, China
| |
Collapse
|
3
|
Zhu Y, Gong C, Pan S, Wu S. Shelf-life extension of soy sauce by using chitosan oligosaccharides combined with tea polyphenols. Food Chem X 2023; 20:100985. [PMID: 38144750 PMCID: PMC10739744 DOI: 10.1016/j.fochx.2023.100985] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Revised: 10/31/2023] [Accepted: 11/06/2023] [Indexed: 12/26/2023] Open
Abstract
Chitosan oligosaccharides (COs) and tea polyphenols (TPs) have antioxidant and antibacterial activities. This study aims to explore the preservative effects of 0.1 % COs alone and combined with 0.08 % TPs on soy sauce during room-temperature storage. Soy sauce treated with 0.1 % COs alone and combined with 0.08 % TPs had lower total bacterial count, Escherichia coli count and pH, and higher amino acid nitrogen and overall likeness score than those of the control group during room-temperature storage. Treatment with 0.1 % COs combined with 0.08 % TPs extended the shelf life of soy sauce by at least 15 months compared with the control group. Results showed 0.1 % COs combined with 0.08 % TPs may be a feasible method to extend the shelf life of soy sauce during room-temperature storage.
Collapse
Affiliation(s)
- Ying Zhu
- Jiangsu Key Laboratory of Marine Bioresources and Environment/Jiangsu Key Laboratory of Marine Biotechnology, Jiangsu Ocean University, Haizhou, China
- Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Haizhou, China
| | - Chao Gong
- Jiangsu Key Laboratory of Marine Bioresources and Environment/Jiangsu Key Laboratory of Marine Biotechnology, Jiangsu Ocean University, Haizhou, China
- Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Haizhou, China
| | - Saikun Pan
- Jiangsu Key Laboratory of Marine Bioresources and Environment/Jiangsu Key Laboratory of Marine Biotechnology, Jiangsu Ocean University, Haizhou, China
- Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Haizhou, China
| | - Shengjun Wu
- Jiangsu Key Laboratory of Marine Bioresources and Environment/Jiangsu Key Laboratory of Marine Biotechnology, Jiangsu Ocean University, Haizhou, China
- Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Haizhou, China
| |
Collapse
|
4
|
Chen F, Chen YP, Wu H, Li Y, Zhang S, Ke J, Yao JY. Characterization of tea (Camellia sinensis L.) flower extract and insights into its antifungal susceptibilities of Aspergillus flavus. BMC Complement Med Ther 2023; 23:286. [PMID: 37580785 PMCID: PMC10424394 DOI: 10.1186/s12906-023-04122-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Accepted: 08/09/2023] [Indexed: 08/16/2023] Open
Abstract
BACKGROUND Tea (Camellia sinensis L.) flowers will compete with tea leaves in nutrition and are abandoned as an undesirable by-product. In this study, the biological efficacy of tea flowers was investigated. Further exploration of its antifungal activity was explained. METHODS Tea flowers harvested from China were characterized in term of component, antioxidant ability, tyrosinase inhibition, and antifungal ability. Chemical compounds of tea flowers were analyzed by LC-MS. Disinfectant compounds were identified in tea flowers, and 2-ketobutyric acid exhibited antifungal activity against Aspergillus flavusCCTCC AF 2023038. The antifungal mechanism of 2-ketobutyric acid was further investigated by RNA-seq. RESULTS Water-soluble tea flower extracts (TFEs) exhibited free radical scavenging activity against 2,2-diphenyl-1-picrylhydrazyl (DPPH) and 2, 2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid)(ABTS) as well as a high ferric-reducing ability. However, no inhibition of tyrosinase activity was observed. In the antifungal test, 6.4 mg/mL TFE reached 71.5% antifungal rate and the electrical conductivity of the culture broth increased with increasing concentration of TFE, implying that it damaged the fungal cell membrane by the TFE. Several disinfectants were identified in TFE by LC-MS, and 2-ketobutyric acid was also confirmed to be capable of fungal inhibition. Propidium iodide (PI) staining indicated that 2-ketobutyric acid caused damage to the cell membrane. RNA-seq analysis revealed that 3,808 differentially expressed genes (DEGs) were found in A. flavus CCTCC AF 2023038 treated by 2-ketobutyric acid, and more than 1,000 DEGs involved in the integral and intrinsic component of membrane were affected. Moreover, 2-ketobutyric acid downregulated aflatoxin biosynthesis genes and decreased the aflatoxin production. CONCLUSIONS Overall, TFE exhibited excellent antioxidant ability and fungal inhibition against A. flavus CCTCC AF 2023038 due to its abundant disinfectant compounds. As a recognized food additive, 2-ketobutyric acid is safe to use in the food industry and can be utilized as the basis for the research and development of strong fungicides.
Collapse
Affiliation(s)
- Fangfang Chen
- Department of Public Health and Medical Technology, Xiamen Medical College, Xiamen, Fujian, 361023, China
- Engineering Research Center of Natural Cosmeceuticals College of Fujian Province, Xiamen Medical College, Xiamen, Fujian, 361023, China
| | - Yu-Pei Chen
- Department of Public Health and Medical Technology, Xiamen Medical College, Xiamen, Fujian, 361023, China.
- Engineering Research Center of Natural Cosmeceuticals College of Fujian Province, Xiamen Medical College, Xiamen, Fujian, 361023, China.
- School of Public Health, Fujian Medical University, Fuzhou, Fujian Province, China.
| | - Hongtan Wu
- Department of Public Health and Medical Technology, Xiamen Medical College, Xiamen, Fujian, 361023, China
- Engineering Research Center of Natural Cosmeceuticals College of Fujian Province, Xiamen Medical College, Xiamen, Fujian, 361023, China
| | - Ya Li
- Department of Public Health and Medical Technology, Xiamen Medical College, Xiamen, Fujian, 361023, China
- Engineering Research Center of Natural Cosmeceuticals College of Fujian Province, Xiamen Medical College, Xiamen, Fujian, 361023, China
| | - Shudi Zhang
- Department of Public Health and Medical Technology, Xiamen Medical College, Xiamen, Fujian, 361023, China
- Engineering Research Center of Natural Cosmeceuticals College of Fujian Province, Xiamen Medical College, Xiamen, Fujian, 361023, China
| | - Jincheng Ke
- Department of Dermatology, The Second Affiliated Hospital of Xiamen Medical College, Xiamen, Fujian, 361000, China
| | - Jeng-Yuan Yao
- Department of Basic Medicine, Xiamen Medical College, Xiamen, Fujian, 361023, China
| |
Collapse
|
5
|
Afewerki S, Edlund U. Combined Catalysis: A Powerful Strategy for Engineering Multifunctional Sustainable Lignin-Based Materials. ACS NANO 2023; 17:7093-7108. [PMID: 37014848 PMCID: PMC10134738 DOI: 10.1021/acsnano.3c00436] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/15/2023] [Accepted: 03/31/2023] [Indexed: 06/19/2023]
Abstract
The production and engineering of sustainable materials through green chemistry will have a major role in our mission of transitioning to a more sustainable society. Here, combined catalysis, which is the integration of two or more catalytic cycles or activation modes, provides innovative chemical reactions and material properties efficiently, whereas the single catalytic cycle or activation mode alone fails in promoting a successful reaction. Polyphenolic lignin with its distinctive structural functions acts as an important template to create materials with versatile properties, such as being tough, antimicrobial, self-healing, adhesive, and environmentally adaptable. Sustainable lignin-based materials are generated by merging the catalytic cycle of the quinone-catechol redox reaction with free radical polymerization or oxidative decarboxylation reaction, which explores a wide range of metallic nanoparticles and metal ions as the catalysts. In this review, we present the recent work on engineering lignin-based multifunctional materials devised through combined catalysis. Despite the fruitful employment of this concept to material design and the fact that engineering has provided multifaceted materials able to solve a broad spectrum of challenges, we envision further exploration and expansion of this important concept in material science beyond the catalytic processes mentioned above. This could be accomplished by taking inspiration from organic synthesis where this concept has been successfully developed and implemented.
Collapse
Affiliation(s)
- Samson Afewerki
- Fibre
and Polymer Technology, KTH Royal Institute
of Technology, SE 100 44 Stockholm, Sweden
| | - Ulrica Edlund
- Fibre
and Polymer Technology, KTH Royal Institute
of Technology, SE 100 44 Stockholm, Sweden
| |
Collapse
|