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Das S, Mohapatra S, Kar S, Bhatt S, Pundir S. Reactive species variation in cold atmospheric pressure plasma jet discharge under the influence of intrinsic parameters and its effect on E. coli inactivation. Biointerphases 2023; 18:061003. [PMID: 38078794 DOI: 10.1116/6.0003042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Accepted: 11/14/2023] [Indexed: 12/18/2023] Open
Abstract
Cold atmospheric pressure plasma jet (CAPJ) has piqued the interest of researchers for various antimicrobial applications such as disinfection, wound decontamination, etc. In the current context, a deeper understanding of the correlation between CAPJ's intrinsic parameters, discharge characteristics, species composition, and antimicrobial activity is required for any successful application. This research evaluated the effect of intrinsic operational parameters such as voltage, frequency, gas flow rate, and operating gas on the reactive species composition of an in-house-developed CAPJ discharge along with the antimicrobial activity. It was observed that the identified excited atoms (Ar I, He I, N2, and O I), ions (Ar+, N2+, N+, H2O+, H3O+, etc.), radical reactive oxygen and nitrogen species (RONS) (OH•), and nonradical RONS (O I, O+, OH+, NO+, O2+, O2-, NO2-, N2O2-, NO3-, N2O3-, etc.) might play a synergistic role in bacterial inactivation via oxidative and electrostatic stress. The variation in voltage, frequency, gas flow rate, and operating gas influenced the discharge chemistry, leading to variation in bacterial inactivation. The reactive species in the discharge responsible for such variation was evaluated extensively. This investigation into various operational parameters would aid in determining the most effective settings for a developed CAPJ to achieve high productivity.
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Affiliation(s)
- Sarthak Das
- School of Interdisciplinary Research, Indian Institute of Technology Delhi, New Delhi 110016, India
| | - Sarita Mohapatra
- School of Interdisciplinary Research, Indian Institute of Technology Delhi, New Delhi 110016, India
- Department of Microbiology, All India Institute of Medical Sciences, New Delhi 110029, India
| | - Satyananda Kar
- School of Interdisciplinary Research, Indian Institute of Technology Delhi, New Delhi 110016, India
- Department of Energy Science and Engineering, Indian Institute of Technology Delhi, New Delhi 110016, India
| | - Satyendra Bhatt
- Department of Microbiology, All India Institute of Medical Sciences, New Delhi 110029, India
| | - Swati Pundir
- Department of Microbiology, All India Institute of Medical Sciences, New Delhi 110029, India
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Zhang H, Zhang C, Han Q. Mechanisms of bacterial inhibition and tolerance around cold atmospheric plasma. Appl Microbiol Biotechnol 2023:10.1007/s00253-023-12618-w. [PMID: 37421472 PMCID: PMC10390405 DOI: 10.1007/s00253-023-12618-w] [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] [Received: 01/21/2023] [Revised: 05/29/2023] [Accepted: 06/01/2023] [Indexed: 07/10/2023]
Abstract
The grim situation of bacterial infection has undoubtedly become a major threat to human health. In the context of frequent use of antibiotics, a new bactericidal method is urgently needed to fight against drug-resistant bacteria caused by non-standard use of antibiotics. Cold atmospheric plasma (CAP) is composed of a variety of bactericidal species, which has excellent bactericidal effect on microbes. However, the mechanism of interaction between CAP and bacteria is not completely clear. In this paper, we summarize the mechanisms of bacterial killing by CAP in a systematic manner, discuss the responses of bacteria to CAP treatment that are considered to be related to tolerance and their underlying mechanisms, review the recent advances in bactericidal applications of CAP finally. This review indicates that CAP inhibition and tolerance of survival bacteria are a set of closely related mechanisms and suggests that there might be other mechanisms of tolerance to survival bacteria that had not been discovered yet. In conclusion, this review shows that CAP has complex and diverse bactericidal mechanisms, and has excellent bactericidal effect on bacteria at appropriate doses. KEY POINTS: • The bactericidal mechanism of CAP is complex and diverse. • There are few resistant bacteria but tolerant bacteria during CAP treatment. • There is excellent germicidal effect when CAP in combination with other disinfectants.
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Affiliation(s)
- Hao Zhang
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Disease, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, People's Republic of China
| | - Chengxi Zhang
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Disease, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, People's Republic of China
| | - Qi Han
- Department of Oral Pathology, State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, People's Republic of China.
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Cao W, Mao H, McCallum NC, Zhou X, Sun H, Sharpe C, Korpanty J, Hu Z, Ni QZ, Burkart MD, Shawkey MD, Wasielewski MR, Gianneschi NC. Biomimetic pheomelanin to unravel the electronic, molecular and supramolecular structure of the natural product. Chem Sci 2023; 14:4183-4192. [PMID: 37063797 PMCID: PMC10094096 DOI: 10.1039/d2sc06418a] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Accepted: 02/18/2023] [Indexed: 04/03/2023] Open
Abstract
A robust route to synthetic pheomelanin gives insight into the electronic, molecular and supramolecular structure of the natural product, further advancing our understanding of this important subfamily of melanin.
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Affiliation(s)
- Wei Cao
- Department of Chemistry, Northwestern University, Evanston, Illinois, 60208, USA
- Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois, 60208, USA
- Department of Biomedical Engineering, Department of Pharmacology, International Institute for Nanotechnology, Simpson-Querrey Institute, Chemistry of Life Processes Institute, Lurie Cancer Center, Northwestern University, Evanston, Illinois, 60208, USA
| | - Haochuan Mao
- Department of Chemistry, Northwestern University, Evanston, Illinois, 60208, USA
- Institute for Sustainability and Energy at Northwestern University, Evanston, Illinois, 60208, USA
| | - Naneki C. McCallum
- Department of Chemistry, Northwestern University, Evanston, Illinois, 60208, USA
| | - Xuhao Zhou
- Department of Chemistry, Northwestern University, Evanston, Illinois, 60208, USA
| | - Hao Sun
- Department of Chemistry, Northwestern University, Evanston, Illinois, 60208, USA
- Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois, 60208, USA
- Department of Biomedical Engineering, Department of Pharmacology, International Institute for Nanotechnology, Simpson-Querrey Institute, Chemistry of Life Processes Institute, Lurie Cancer Center, Northwestern University, Evanston, Illinois, 60208, USA
- Department of Chemistry and Chemical & Biomedical Engineering, Tagliatela College of Engineering, University of New Haven, West Haven, Connecticut, 06516, USA
| | - Christopher Sharpe
- Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois, 60208, USA
| | - Joanna Korpanty
- Department of Chemistry, Northwestern University, Evanston, Illinois, 60208, USA
| | - Ziying Hu
- Department of Chemistry, Northwestern University, Evanston, Illinois, 60208, USA
| | - Qing Zhe Ni
- Department of Chemistry & Biochemistry, University of California, San Diego, La Jolla, California, 92093, USA
| | - Michael D. Burkart
- Department of Chemistry & Biochemistry, University of California, San Diego, La Jolla, California, 92093, USA
| | - Matthew D. Shawkey
- Evolution and Optics of Nanostructures Group, Department of Biology, The University of Ghent, 9000, Ghent, Belgium
| | - Michael R. Wasielewski
- Department of Chemistry, Northwestern University, Evanston, Illinois, 60208, USA
- Institute for Sustainability and Energy at Northwestern University, Evanston, Illinois, 60208, USA
| | - Nathan C. Gianneschi
- Department of Chemistry, Northwestern University, Evanston, Illinois, 60208, USA
- Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois, 60208, USA
- Department of Biomedical Engineering, Department of Pharmacology, International Institute for Nanotechnology, Simpson-Querrey Institute, Chemistry of Life Processes Institute, Lurie Cancer Center, Northwestern University, Evanston, Illinois, 60208, USA
- Department of Chemistry & Biochemistry, University of California, San Diego, La Jolla, California, 92093, USA
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Zhang Y, Wang F, Wu H, Fan L, Wang Y, Liu X, Zhang H. Sterilising effect of high power pulse microwave on Listeria monocytogenes. INTERNATIONAL FOOD RESEARCH JOURNAL 2022. [DOI: 10.47836/ifrj.29.5.18] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
In the present work, Listeria monocytogenes was used as the target strain to investigate the sterilising potential and mechanism of high power pulse microwave (HPPM). Results showed that the inactivation was positively correlated with the pulse frequencies and operating times. The count of Listeria monocytogenes was decreased by 5.09 log CFU/mL under 200 Hz for 9 min, which was used as the optimised condition to further explore the sterilisation mechanism. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) images showed that the L. monocytogenes cells of untreated group presented intact surfaces, clear boundary, and its intracellular contents distributed uniformly in the cytoplasm. Following treatment, the cell wall surfaces began to deform in small areas, and cell membranes were severely ruptured, thus resulting in the appearance of electron transmission areas. Extracellular protein and nucleic acid contents, represented by OD260 nm and OD280 nm, increased with the increase in operating time significantly. After treatment, SDS-PAGE profiles of whole-cell proteins displayed that the protein bands became lighter or even disappeared. Na+ K+-ATPase activities and intracellular ATP content decreased by 72.97 and 79.09%, respectively. This was consistent with the cell viability of L. monocytogenes observed by confocal laser scanning microscopy. Overall, the sterilisation mechanism of HPPM on L. monocytogenes may be caused by membrane damage, intracellular component leakage, and energy metabolism hindrance.
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de Melo TF, Rocha LC, Silva RP, Pessoa RS, Negreiros AMP, Sales Júnior R, Tavares MB, Alves Junior C. Plasma–Saline Water Interaction: A Systematic Review. MATERIALS 2022; 15:ma15144854. [PMID: 35888319 PMCID: PMC9324451 DOI: 10.3390/ma15144854] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Revised: 06/28/2022] [Accepted: 07/08/2022] [Indexed: 11/16/2022]
Abstract
Plasma–liquid interaction research has developed substantially in recent years due, mostly, to the numerous applications of cold atmospheric plasma (CAP). Plasma–liquid interactions are influenced by the concentrations of the ionic species present in the liquid environment, and few studies have paid attention to saline water, which generally mediates the reactions in many plasma applications. Therefore, the present review aims to explore the main results and the influence of variables on the modification of properties of saline water by CAP sources following the guidelines of the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA). The searches were carried out in the Scopus, Science Direct, and Web of Science databases, resulting in the inclusion of 37 studies. The main effects of the interaction between CAP and saline water are (i) the production of reactive oxygen and nitrogen species (RONS); (ii) the increase in conductivity and decrease in pH, directly proportional to the increase in discharge voltage; (iii) and the effective area of interaction and the shortest distance between electrode and solution. Other effects are the localized evaporation and crystallization of salts, which make the interaction between plasma and saline water a promising field in the development of technologies for desalination and improvement of liquid properties.
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Affiliation(s)
- Tatiane Fonseca de Melo
- Laboratorio de Plasma Aplicação na Agricultura, Departamento de Ciências Exatas e Naturais, Saúde e Meio Ambiente—Labplasma, Universidade Federal Rural do Semiárido, Mossoró 59625-900, Brazil; (L.C.R.); (R.P.S.); (C.A.J.)
- Correspondence:
| | - Lucas Cabral Rocha
- Laboratorio de Plasma Aplicação na Agricultura, Departamento de Ciências Exatas e Naturais, Saúde e Meio Ambiente—Labplasma, Universidade Federal Rural do Semiárido, Mossoró 59625-900, Brazil; (L.C.R.); (R.P.S.); (C.A.J.)
| | - Rútilo Pereira Silva
- Laboratorio de Plasma Aplicação na Agricultura, Departamento de Ciências Exatas e Naturais, Saúde e Meio Ambiente—Labplasma, Universidade Federal Rural do Semiárido, Mossoró 59625-900, Brazil; (L.C.R.); (R.P.S.); (C.A.J.)
| | - Rodrigo Sávio Pessoa
- Laboratório de Plasmas e Processos, Instituto Tecnológico de Aeronáutica, São José dos Campos 12228-900, Brazil;
| | - Andreia Mitsa Paiva Negreiros
- Departamento de Ciências Agronômicas e Florestais, Universidade Federal Rural do Semi-Árido, Mossoro 59625-900, Brazil; (A.M.P.N.); (R.S.J.); (M.B.T.)
| | - Rui Sales Júnior
- Departamento de Ciências Agronômicas e Florestais, Universidade Federal Rural do Semi-Árido, Mossoro 59625-900, Brazil; (A.M.P.N.); (R.S.J.); (M.B.T.)
| | - Moisés Bento Tavares
- Departamento de Ciências Agronômicas e Florestais, Universidade Federal Rural do Semi-Árido, Mossoro 59625-900, Brazil; (A.M.P.N.); (R.S.J.); (M.B.T.)
| | - Clodomiro Alves Junior
- Laboratorio de Plasma Aplicação na Agricultura, Departamento de Ciências Exatas e Naturais, Saúde e Meio Ambiente—Labplasma, Universidade Federal Rural do Semiárido, Mossoró 59625-900, Brazil; (L.C.R.); (R.P.S.); (C.A.J.)
- Programa de Pós-Graduação em Engenharia Mecânica, Universidade Federal do Rio Grande do Norte, Natal 59078-970, Brazil
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Vuerich R, Martinelli V, Vodret S, Bertani I, Carletti T, Zentilin L, Venturi V, Marcello A, Zacchigna S. A new laser device for ultra-rapid and sustainable aerosol sterilization. ENVIRONMENT INTERNATIONAL 2022; 164:107272. [PMID: 35526297 PMCID: PMC9060718 DOI: 10.1016/j.envint.2022.107272] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Revised: 04/27/2022] [Accepted: 04/27/2022] [Indexed: 06/14/2023]
Abstract
The current COVID-19 pandemic has highlighted the importance of aerosol-based transmission of human pathogens; this therefore calls for novel medical devices which are able to sterilize contaminated aerosols. Here we describe a new laser device able to sterilize droplets containing either viruses or bacteria. Using engineered viral particles, we determined the 10,600 nm wavelength as the most efficient and exploitable laser source to be manufactured in a commercial device. Given the lack of existing working models to reproduce a human aerosol containing living microbial particles, we developed a new system mimicking human droplet formation and preserving bacterial and viral viability. This evidenced the efficacy of 10,600 nm laser light to kill two aerosol transmitted human pathogens, Legionella pneumophila and SARS-CoV-2. The minimal exposure time of <15 ms was required for the inactivation of over 99% pathogens in the aerosol; this is a key element in the design of a device that is safe and can be used in preventing inter-individual transmission. This represents a major advantage over existing devices, which mainly aim at either purifying incoming air by filters or sterilizing solid surfaces, which are not the major transmission routes for airborne communicable diseases.
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Affiliation(s)
- Roman Vuerich
- Cardiovascular Biology Laboratory, International Centre for Genetic Engineering and Biotechnology (ICGEB), 34149 Trieste, Italy; Department of Life Sciences, University of Trieste, 34127 Trieste, Italy
| | | | - Simone Vodret
- Cardiovascular Biology Laboratory, International Centre for Genetic Engineering and Biotechnology (ICGEB), 34149 Trieste, Italy
| | - Iris Bertani
- Laboratory: Bacteriology Laboratory, International Centre for Genetic Engineering and Biotechnology (ICGEB), 34149 Trieste, Italy
| | - Tea Carletti
- Molecular Virology Laboratory, International Centre for Genetic Engineering and Biotechnology (ICGEB), 34149 Trieste, Italy
| | - Lorena Zentilin
- Molecular Medicine Laboratory, International Centre for Genetic Engineering and Biotechnology (ICGEB), 34149 Trieste, Italy
| | - Vittorio Venturi
- Laboratory: Bacteriology Laboratory, International Centre for Genetic Engineering and Biotechnology (ICGEB), 34149 Trieste, Italy
| | - Alessandro Marcello
- Molecular Virology Laboratory, International Centre for Genetic Engineering and Biotechnology (ICGEB), 34149 Trieste, Italy
| | - Serena Zacchigna
- Cardiovascular Biology Laboratory, International Centre for Genetic Engineering and Biotechnology (ICGEB), 34149 Trieste, Italy; Department of Medical, Surgical and Health Sciences, University of Trieste, 34127 Trieste, Italy. https://www.icgeb.org/cardiovascular-biology/
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