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Mao Y, Chen Z, Lu Y, Cao KF, Wu Y, Hu HY. Inactivation of Bacteria in Water by Ferrate(VI): Efficiency and Mechanisms. Environ Sci Technol 2023; 57:20893-20904. [PMID: 38032700 DOI: 10.1021/acs.est.3c05118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2023]
Abstract
Ferrate (Fe(VI)) is an emerging green disinfectant and has received increasing attention nowadays. This study conducted systematic analyses of Fe(VI) disinfection on six typical bacteria in different water matrices. The results showed that Fe(VI) was more effective in inactivating Gram-negative (G-) bacteria than Gram-positive (G+) bacteria, and the disinfection performance of Fe(VI) was better in a phosphate buffer than that in a borate buffer and secondary effluent. The inactivation rate constants of G- bacteria were significantly higher than those of G+ bacteria. The cell membrane damage of G- bacteria was also more severe than that of G+ bacteria after Fe(VI) treatment. The cell wall structure, especially cell wall thickness, might account for the difference of the inactivation efficiency between G- bacteria and G+ bacteria. Moreover, it is revealed that Fe(VI) primarily reacted with proteins rather than other biological molecules (i.e., phospholipids, peptidoglycan, and lipopolysaccharide). This was further evidenced by the reduction of bacterial autofluorescence due to the destruction of bacterial proteins during Fe(VI) inactivation. Overall, this study advances the understanding of Fe(VI) disinfection mechanisms and provides valuable information for the Fe(VI) application in water disinfection.
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Affiliation(s)
- Yu Mao
- Environmental Simulation and Pollution Control State Key Joint Laboratory, State Environmental Protection Key Laboratory of Microorganism Application and Risk Control (SMARC), Beijing Laboratory for Environmental Frontier Technologies, School of Environment, Tsinghua University, Beijing 100084, P. R. China
| | - Zhuo Chen
- Environmental Simulation and Pollution Control State Key Joint Laboratory, State Environmental Protection Key Laboratory of Microorganism Application and Risk Control (SMARC), Beijing Laboratory for Environmental Frontier Technologies, School of Environment, Tsinghua University, Beijing 100084, P. R. China
| | - Yun Lu
- Environmental Simulation and Pollution Control State Key Joint Laboratory, State Environmental Protection Key Laboratory of Microorganism Application and Risk Control (SMARC), Beijing Laboratory for Environmental Frontier Technologies, School of Environment, Tsinghua University, Beijing 100084, P. R. China
| | - Ke-Fan Cao
- Environmental Simulation and Pollution Control State Key Joint Laboratory, State Environmental Protection Key Laboratory of Microorganism Application and Risk Control (SMARC), Beijing Laboratory for Environmental Frontier Technologies, School of Environment, Tsinghua University, Beijing 100084, P. R. China
| | - Yinhu Wu
- Environmental Simulation and Pollution Control State Key Joint Laboratory, State Environmental Protection Key Laboratory of Microorganism Application and Risk Control (SMARC), Beijing Laboratory for Environmental Frontier Technologies, School of Environment, Tsinghua University, Beijing 100084, P. R. China
| | - Hong-Ying Hu
- Environmental Simulation and Pollution Control State Key Joint Laboratory, State Environmental Protection Key Laboratory of Microorganism Application and Risk Control (SMARC), Beijing Laboratory for Environmental Frontier Technologies, School of Environment, Tsinghua University, Beijing 100084, P. R. China
- Research Institute for Environmental Innovation (Suzhou), Tsinghua, Suzhou 215163, P. R. China
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You Y, Zou J, Li WJ, Chen J, Jiang XY, Yu JG. Novel lanthanum vanadate-based nanocomposite for simultaneously electrochemical detection of dopamine and uric acid in fetal bovine serum. Int J Biol Macromol 2022; 195:346-355. [PMID: 34920056 DOI: 10.1016/j.ijbiomac.2021.12.058] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2021] [Revised: 12/07/2021] [Accepted: 12/08/2021] [Indexed: 01/01/2023]
Abstract
The abnormal levels of two biological molecules, dopamine (DA) and Uric acid (UA), in human body are symptoms of diseases such as Parkinson's disease and arrhythmia. A novel lanthanum vanadate and multi-walled carbon nanotubes (LaV-MWCNTs) composite modified glassy carbon electrode (GCE) was developed and utilized as an efficient electrochemical sensor for the simultaneous detection of DA and UA. LaV-MWCNTs composite was successfully fabricated by a facile ultrasonic self-assembly method and identified by means of a series of successive measurements including XPS, XRD, FT-IR and FE-SEM. The LaV-MWCNTs modified GCE shows the concentration linear ranges of DA and UA are 2-100 μΜ using DPV. The limits of detection (LODs; signal-to-noise ratio of 3, S/N = 3) of the LaV-MWCNTs modified GCE sensor for DA and UA were calculated to be 0.046 μM and 0.025 μM, respectively. The feasibility of using the LaV-MWCNTs modified GCE sensor to detect DA and UA in a typical biological fluid, fetal bovine serum, was also evaluated by the standard addition method.
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Affiliation(s)
- Ya You
- College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan 410083, China
| | - Jiao Zou
- College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan 410083, China
| | - Wen-Jie Li
- Xiangya School of Stomatology & Xiangya Stomatological Hospital, Central South University, Changsha, Hunan 410008, China
| | - Jun Chen
- Xiangya School of Stomatology & Xiangya Stomatological Hospital, Central South University, Changsha, Hunan 410008, China
| | - Xin-Yu Jiang
- College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan 410083, China
| | - Jin-Gang Yu
- College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan 410083, China.
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Tiwari A, Melchor-Martínez EM, Saxena A, Kapoor N, Singh KJ, Saldarriaga-Hernández S, Parra-Saldívar R, Iqbal HMN. Therapeutic attributes and applied aspects of biological macromolecules (polypeptides, fucoxanthin, sterols, fatty acids, polysaccharides, and polyphenols) from diatoms - A review. Int J Biol Macromol 2021; 171:398-413. [PMID: 33422516 DOI: 10.1016/j.ijbiomac.2020.12.219] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2020] [Revised: 12/26/2020] [Accepted: 12/30/2020] [Indexed: 02/08/2023]
Abstract
Diatoms are ubiquitous, biologically widespread, and have global significance due to their unique silica cell wall composition and noteworthy applied aspects. Diatoms are being extensively exploited for environmental monitoring, reconstruction, and stratigraphic correlation. However, considering all the rich elements of diatoms biology, the current literature lacks sufficient information on the therapeutic attributes and applied aspects of biological macromolecules from diatoms, hampering added advances in all aspects of diatom biology. Diatoms offer numerous high-value compounds, such as fatty acids, polysaccharides, polypeptides, pigments, and polyphenols. Diatoms with a high content of PUFA's are targets of transformation into high-value products through microalgal technologies due to their wide application and growing market as nutraceuticals and food supplements. Diatoms are renewable biomaterial, which can be used to develop drug delivery systems due to biocompatibility, surface area, cost-effective ratio, and ease in surface modifications. Innovative approaches are needed to envisage cost-effective ways for the isolation of bioactive compounds, enhance productivity, and elucidate the detailed mechanism of action. This review spotlights the notable applications of diatoms and their biologically active constituents, such as fucoxanthin and omega 3 fatty acids, among others with unique structural and functional entities.
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Affiliation(s)
- Archana Tiwari
- Diatom Research Laboratory, Amity Institute of Biotechnology, Amity University, Noida, India.
| | | | - Abhishek Saxena
- Diatom Research Laboratory, Amity Institute of Biotechnology, Amity University, Noida, India
| | - Neha Kapoor
- Department of Chemistry, Hindu College, University of Delhi, New Delhi, India
| | - Kawal Jeet Singh
- Diatom Research Laboratory, Amity Institute of Biotechnology, Amity University, Noida, India
| | | | | | - Hafiz M N Iqbal
- Tecnologico de Monterrey, School of Engineering and Sciences, Monterrey 64849, Mexico.
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Abstract
Recent progresses in high-speed atomic force microscopy (HS-AFM) have enabled us to directly visualize dynamic processes of various proteins in liquid conditions. One of the key factors leading to successful HS-AFM observations is the selection of an appropriate substrate depending on molecules to be observed. For the HS-AFM imaging, a target molecule must be absorbed on a substrate by controlling its orientation without impairing the dynamics or physiological function of the molecule. In this chapter, we describe protocols for preparation of substrates that have been used for HS-AFM and then introduce observation examples on dynamic processes of biological molecules.
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Xu Q, Jiang Y, Chu W, Su C, Hu D, Lu Q, Zhang T. Response of Spirodela polyrhiza to cerium: subcellular distribution, growth and biochemical changes. Ecotoxicol Environ Saf 2017; 139:56-64. [PMID: 28110046 DOI: 10.1016/j.ecoenv.2017.01.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2016] [Revised: 01/04/2017] [Accepted: 01/06/2017] [Indexed: 06/06/2023]
Abstract
Rare earth elements are new and emerging contaminants in freshwater systems. Greater duckweed (Spirodela polyrhiza L.) is a common aquatic plant widely used in phytotoxicity tests for xenobiotic substances. In this study, the cerium (Ce) accumulation potential, the distribution of Ce in bio-molecules, and ensuing biochemical responses were investigated in greater duckweed fronds when they were exposed to Ce (0, 10, 20, 40, and 60μM). There was a concentration dependent increase in Ce accumulation, which reached a maximum of 67mgg-1 of dry weight (DW) at 60μM Ce after 14 d. The Ce concentrations in bio-macromolecules followed the order: cellulose and pectin > proteins > polysaccharides > lipids. In response to Ce exposure, significant chlorosis; declines in growth, photosynthetic pigment and protein contents; and cell death were noted at the highest Ce concentration. Photosystem II inhibition, degradation of the reaction center protein D1, and damage to chloroplast ultrastructure were observed in Ce treated S. polyrhiza fronds, as revealed by chlorophyll a fluorescence transients, immunoblotting, and transmission electron microscopy (TEM). O2.- accumulation and malondialdehyde (MDA) content in the treated fronds increased in a concentration dependent manner, which indicated that oxidative stress and unsaturated fatty acids (C18:3) were specifically affected by Ce exposure. These results suggest Ce exerts its toxic effects on photosynthesis, with a primary effect on PS II, through oxidative stress.
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Affiliation(s)
- Qinsong Xu
- College of Life Science, Nanjing Normal University, Nanjing 210023, China.
| | - Yuji Jiang
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
| | - Weiyue Chu
- College of Life Science, Nanjing Normal University, Nanjing 210023, China
| | - Chunlei Su
- College of Life Science, Nanjing Normal University, Nanjing 210023, China
| | - Dan Hu
- College of Life Science, Nanjing Normal University, Nanjing 210023, China
| | - Qianqian Lu
- College of Life Science, Nanjing Normal University, Nanjing 210023, China
| | - Tingting Zhang
- College of Life Science, Nanjing Normal University, Nanjing 210023, China
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Abstract
Regenerative endodontic treatment has yielded excellent clinical outcomes, but only several animal studies have shown the robust regeneration of the pulp-dentin complex. The biological molecules, if properly delivered, can enkindle regeneration of dental pulp and dentin rather than repair with tissues of periodontal origin. This review details the biological significance of regenerating the pulp-dentin complex, the effects of biological cues in pulp regeneration, and the delivery strategies of biological molecules to enhance the outcomes of regenerative endodontic therapy.
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Affiliation(s)
- Sahng G Kim
- Division of Endodontics, College of Dental Medicine, Columbia University, 630 West 168 Street, PH7Stem128, New York, NY 10032, USA.
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Xu T, Su C, Hu D, Li F, Lu Q, Zhang T, Xu Q. Molecular distribution and toxicity assessment of praseodymium by Spirodela polyrrhiza. J Hazard Mater 2016; 312:132-140. [PMID: 27017399 DOI: 10.1016/j.jhazmat.2016.03.040] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2015] [Revised: 03/04/2016] [Accepted: 03/16/2016] [Indexed: 06/05/2023]
Abstract
Aquatic macrophytes are known to accumulate and bioconcentrate metals. In this study, the physiological, biochemical, and ultrastructural responses of Spirodela polyrrhiza to elevated concentrations of praseodymium (Pr), ranging from 0 to 60μM, were investigated over 20 d exposure. The results showed that the accumulation of Pr in S. polyrrhiza occurred in a concentration-dependent manner. The accumulation of Pr in biomacromolecules decreased in the order of cellulose and pectin (65-69%), crude proteins (18-25%), crude polysaccharides (6-10%), crude lipids (3%-4%). Significant increases in malondialdehyde (MDA), and decreases in photosynthetic pigment, soluble protein, and unsaturated fatty acids showed that Pr induced oxidative stress. Inhibitory effects on photosystem II and the degradation of the reaction center proteins D1 and D2 were revealed by chlorophyll a fluorescence transients, immunoblotting, and damage to chloroplast ultrastructure. Significant increases in cell death were observed in Pr-treated plants. However, S. polyrrhiza can combat Pr induced oxidative injury by activating various enzymatic and non-enzymatic antioxidants. These results will improve understanding of the biological consequences of rare earth elements (REEs) contamination, particularly in aquatic bodies.
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Affiliation(s)
- Ting Xu
- College of Life Science, Nanjing Normal University, Nanjing 210023, PR China
| | - Chunlei Su
- College of Life Science, Nanjing Normal University, Nanjing 210023, PR China
| | - Dan Hu
- College of Life Science, Nanjing Normal University, Nanjing 210023, PR China
| | - Feifei Li
- College of Life Science, Nanjing Normal University, Nanjing 210023, PR China
| | - Qianqian Lu
- College of Life Science, Nanjing Normal University, Nanjing 210023, PR China
| | - Tingting Zhang
- College of Life Science, Nanjing Normal University, Nanjing 210023, PR China
| | - Qinsong Xu
- College of Life Science, Nanjing Normal University, Nanjing 210023, PR China.
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