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Chawley P, Jagadevan S. Biodegradation of quinoline by Nitrosomonas mobilis Ms1 through nitrification: A mechanistic study. Biochem Eng J 2023. [DOI: 10.1016/j.bej.2023.108933] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/07/2023]
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Martínez-Rodríguez P, Sánchez-Castro I, Ojeda JJ, Abad MM, Descostes M, Merroun ML. Effect of different phosphate sources on uranium biomineralization by the Microbacterium sp. Be9 strain: A multidisciplinary approach study. Front Microbiol 2023; 13:1092184. [PMID: 36699588 PMCID: PMC9868770 DOI: 10.3389/fmicb.2022.1092184] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Accepted: 12/16/2022] [Indexed: 01/11/2023] Open
Abstract
Introduction Industrial activities related with the uranium industry are known to generate hazardous waste which must be managed adequately. Amongst the remediation activities available, eco-friendly strategies based on microbial activity have been investigated in depth in the last decades and biomineralization-based methods, mediated by microbial enzymes (e.g., phosphatase), have been proposed as a promising approach. However, the presence of different forms of phosphates in these environments plays a complicated role which must be thoroughly unraveled to optimize results when applying this remediation process. Methods In this study, we have looked at the effect of different phosphate sources on the uranium (U) biomineralization process mediated by Microbacterium sp. Be9, a bacterial strain previously isolated from U mill tailings. We applied a multidisciplinary approach (cell surface characterization, phosphatase activity, inorganic phosphate release, cell viability, microscopy, etc.). Results and Discussion It was clear that the U removal ability and related U interaction mechanisms by the strain depend on the type of phosphate substrate. In the absence of exogenous phosphate substrate, the cells interact with U through U phosphate biomineralization with a 98% removal of U within the first 48 h. However, the U solubilization process was the main U interaction mechanism of the cells in the presence of inorganic phosphate, demonstrating the phosphate solubilizing potential of the strain. These findings show the biotechnological use of this strain in the bioremediation of U as a function of phosphate substrate: U biomineralization (in a phosphate free system) and indirectly through the solubilization of orthophosphate from phosphate (P) containing waste products needed for U precipitation.
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Affiliation(s)
- Pablo Martínez-Rodríguez
- Department of Microbiology, University of Granada, Granada, Spain,*Correspondence: Pablo Martínez-Rodríguez, ✉
| | | | - Jesús J. Ojeda
- Department of Chemical Engineering, Faculty of Science and Engineering, Swansea University, Swansea, United Kingdom
| | - María M. Abad
- Centro de Instrumentación Científica (CIC), University of Granada, Granada, Spain
| | - Michael Descostes
- Environmental R&D Department, ORANO Mining, Chatillon, France,Centre de Géosciences, MINES Paris, PSL University, Fontainebleau, France
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Low-Energy Electron Generation for Biomolecular Damage Inquiry: Instrumentation and Methods. BIOPHYSICA 2022. [DOI: 10.3390/biophysica2040041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Technological advancement has produced a variety of instruments and methods to generate electron beams that have greatly assisted in the extensive theoretical and experimental efforts devoted to investigating the effect of secondary electrons with energies approximately less than 100 eV, which are referred as low-energy electrons (LEEs). In the past two decades, LEE studies have focused on biomolecular systems, which mainly consist of DNA and proteins and their constituents as primary cellular targets of ionizing radiation. These studies have revealed that compared to other reactive species produced by high-energy radiation, LEEs have distinctive pathways and considerable efficiency in inducing lethal DNA lesions. The present work aims to briefly discuss the current state of LEE production technology and to motivate further studies and improvements of LEE generation techniques in relation to biological electron-driven processes associated with such medical applications as radiation therapy and cancer treatment.
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Flavell W. Spiers Memorial Lecture: Prospects for photoelectron spectroscopy. Faraday Discuss 2022; 236:9-57. [DOI: 10.1039/d2fd00071g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An overview is presented of recent advances in photoelectron spectroscopy, focussing on advances in in situ and time-resolved measurements, and in extending the sampling depth of the technique. The future...
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Weng PE, Gooyandeh A, Tariq M, Li T, Godara A, Valenzuela J, Mancini S, Yeung SMT, Sosa R, Wagner DR, Dhall R, Adelstein N, Kao K, Oh D. Microbe-Assisted Nanocomposite Anodes for Aqueous Li-Ion Batteries. ACS APPLIED MATERIALS & INTERFACES 2021; 13:39195-39204. [PMID: 34387480 DOI: 10.1021/acsami.1c07309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
With the rapid increase in the use of lithium-ion batteries (LIBs), the development of safe LIBs has become an important social issue. Replacing flammable organic liquid electrolytes in current LIBs with water can be an alternative route to resolve this safety concern. The water-in-salt (WIS) electrolytes received great attention as next-generation electrolytes due to their large electrochemical stability window. However, their high cathodic limit remains as a challenge, impeding the use of low-potential anodes. Here, we report the first biodirected synthesis of carbonaceous layers on anodes to use them as interlayers that prevent a direct contact of water molecules to anode particles. High-aspect ratio microbes are utilized as precursors of carbonaceous layers on TiO2 nanoparticles (m-TiO2) to enhance the conductivity and to reduce the electrolysis of WIS electrolytes. We selected the cylindrical shape of microbes that offers geometric diversity, providing us a toolkit to investigate the effect of microbe length in forming the network in binary composites and their impacts on the battery performance with WIS electrolytes. Using microbes with varying aspect ratios, the optimal microbe size to maximize the battery performance is determined. The effects of storage time on microbe size are also studied. Compared to uncoated TiO2 anodes, m-TiO2 exhibited 49% higher capacity at the 40th cycle and enhanced the cycle life close to anodes made with a conventional carbon precursor while using an 11% less amount of carbon. We performed density functional theory calculations to unravel the underlying mechanism of the performance improvement using microbe-derived carbon layers. Computational results show that high amounts of pyridinic nitrogen present in the peptide bonds in microbes are expected to slow down the water diffusion. Our findings provide key insights into the design of an interlayer for WIS anodes and open an avenue to fabricate energy storage materials using biomaterials.
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Affiliation(s)
- Pei-En Weng
- Chemical and Materials Engineering Department, Charles W. Davidson College of Engineering, San José State University, One Washington Square, San José, California 95192-0080, United States
| | - Alexander Gooyandeh
- Chemical and Materials Engineering Department, Charles W. Davidson College of Engineering, San José State University, One Washington Square, San José, California 95192-0080, United States
| | - Muhammad Tariq
- Chemical and Materials Engineering Department, Charles W. Davidson College of Engineering, San José State University, One Washington Square, San José, California 95192-0080, United States
| | - Tianyu Li
- Department of Chemical Engineering, Texas A&M University, Jack E. Brown Engineering Building, 3122 TAMU, College Station, Texas 77843, United States
| | - Avinash Godara
- Department of Chemical Engineering, Texas A&M University, Jack E. Brown Engineering Building, 3122 TAMU, College Station, Texas 77843, United States
| | - Jocelyn Valenzuela
- Chemical and Materials Engineering Department, Charles W. Davidson College of Engineering, San José State University, One Washington Square, San José, California 95192-0080, United States
| | - Steven Mancini
- Chemical and Materials Engineering Department, Charles W. Davidson College of Engineering, San José State University, One Washington Square, San José, California 95192-0080, United States
| | - Samuel Ming Tuk Yeung
- Chemical and Materials Engineering Department, Charles W. Davidson College of Engineering, San José State University, One Washington Square, San José, California 95192-0080, United States
| | - Ruth Sosa
- Chemical and Materials Engineering Department, Charles W. Davidson College of Engineering, San José State University, One Washington Square, San José, California 95192-0080, United States
| | - David R Wagner
- Chemical and Materials Engineering Department, Charles W. Davidson College of Engineering, San José State University, One Washington Square, San José, California 95192-0080, United States
| | - Rohan Dhall
- National Center for Electron Microscopy, Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley 94720, California, United States
| | - Nicole Adelstein
- Department of Chemistry and Biochemistry, San Francisco State University, 1600 Holloway Avenue, San Francisco, California 94312, United States
| | - Katy Kao
- Chemical and Materials Engineering Department, Charles W. Davidson College of Engineering, San José State University, One Washington Square, San José, California 95192-0080, United States
| | - Dahyun Oh
- Chemical and Materials Engineering Department, Charles W. Davidson College of Engineering, San José State University, One Washington Square, San José, California 95192-0080, United States
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Pagliara P, Chirizzi D, Guascito MR. Chemical characterization of red cells from the black sea urchin Arbacia lixula by X-ray photoelectron spectroscopy. RSC Adv 2021; 11:27074-27083. [PMID: 35480024 PMCID: PMC9037641 DOI: 10.1039/d1ra03156b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Accepted: 07/23/2021] [Indexed: 12/28/2022] Open
Abstract
Red spherula cells (RSC) from sea urchin coelomic fluid have attracted great interest for their specific and intriguing properties, such as for example antimicrobial activities and immune response, that probably tie in with their red characteristic pigments. Although to date different studies have been reported aimed to chemically characterize their pigments extracted from the cells, few data are available about the chemical characterization of the cell surface. In this work, a systematic chemical characterization of the RSC surface by X-ray photoelectron spectroscopy (XPS) analysis is described. The results were compared with data on colorless cells from the same coelomic fluid sample. Our observations evidenced that the two cell types were characterized by the presence of different chemical functional groups. In particular, the colorless cells are dominated by the presence of alkyl, alcohol, amide, and carboxyl groups in accordance with other similar cell types, enriched in Na+ and Cl− ions. Traces of elements like S (sulphonates) and P (phosphates) are also present. On the other hand, the RSC in addition to the alkyl groups show a reduction in the content of amide groups, accompanied by the anomalous presence of keto-enolic groups that probably can be associated with the presence of quinones/hydro-quinones from red pigments. A chemical enrichment in elements such as Cl− and Mg2+ and sulphate groups (–R–O–SO3−), as well as the presence of sulphides and phosphates traces, is evident. The absence of carbonate groups is also observed in both cell populations, confirming the absence of sodium and magnesium carbonate salts. No traces of toxic elements (i.e., heavy metals) have been revealed. Red spherula cells from sea urchin coelomic fluid have attracted great interest for their specific and intriguing properties, such as antimicrobial activities and immune response, that probably tie in with their red characteristic pigments.![]()
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Affiliation(s)
- Patrizia Pagliara
- Dipartimento di Scienze e Tecnologie Biologiche e Ambientali, Università del Salento S.P. Lecce-Monteroni Lecce Italy
| | - Daniela Chirizzi
- Istituto Zooprofilattico Sperimentale della Puglia e della Basilicata (IZS_PB) Via Manfredonia 20 Foggia Italy
| | - Maria Rachele Guascito
- Dipartimento di Scienze e Tecnologie Biologiche e Ambientali, Università del Salento S.P. Lecce-Monteroni Lecce Italy
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Kjærvik M, Ramstedt M, Schwibbert K, Dietrich PM, Unger WES. Comparative Study of NAP-XPS and Cryo-XPS for the Investigation of Surface Chemistry of the Bacterial Cell-Envelope. Front Chem 2021; 9:666161. [PMID: 34026730 PMCID: PMC8132101 DOI: 10.3389/fchem.2021.666161] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Accepted: 04/15/2021] [Indexed: 11/13/2022] Open
Abstract
Bacteria generally interact with the environment via processes involving their cell-envelope. Thus, techniques that may shed light on their surface chemistry are attractive tools for providing an understanding of bacterial interactions. One of these tools is Al Kα-excited photoelectron spectroscopy (XPS) with its estimated information depth of <10 nm. XPS-analyses of bacteria have been performed for several decades on freeze-dried specimens in order to be compatible with the vacuum in the analysis chamber of the spectrometer. A limitation of these studies has been that the freeze-drying method may collapse cell structure as well as introduce surface contaminants. However, recent developments in XPS allow for analysis of biological samples at near ambient pressure (NAP-XPS) or as frozen hydrated specimens (cryo-XPS) in vacuum. In this work, we have analyzed bacterial samples from a reference strain of the Gram-negative bacterium Pseudomonas fluorescens using both techniques. We compare the results obtained and, in general, observe good agreement between the two techniques. Furthermore, we discuss advantages and disadvantages with the two analysis approaches and the output data they provide. XPS reference data from the bacterial strain are provided, and we propose that planktonic cells of this strain (DSM 50090) are used as a reference material for surface chemical analysis of bacterial systems.
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Affiliation(s)
- Marit Kjærvik
- Surface Analysis and Interfacial Chemistry, Bundesanstalt für Materialforschung und -prüfung (BAM), Berlin, Germany
| | | | - Karin Schwibbert
- Surface Analysis and Interfacial Chemistry, Bundesanstalt für Materialforschung und -prüfung (BAM), Berlin, Germany
| | | | - Wolfgang E S Unger
- Surface Analysis and Interfacial Chemistry, Bundesanstalt für Materialforschung und -prüfung (BAM), Berlin, Germany
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Hahn MB, Dietrich PM, Radnik J. In situ monitoring of the influence of water on DNA radiation damage by near-ambient pressure X-ray photoelectron spectroscopy. Commun Chem 2021; 4:50. [PMID: 36697687 PMCID: PMC9814248 DOI: 10.1038/s42004-021-00487-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Accepted: 03/10/2021] [Indexed: 02/01/2023] Open
Abstract
Ionizing radiation damage to DNA plays a fundamental role in cancer therapy. X-ray photoelectron-spectroscopy (XPS) allows simultaneous irradiation and damage monitoring. Although water radiolysis is essential for radiation damage, all previous XPS studies were performed in vacuum. Here we present near-ambient-pressure XPS experiments to directly measure DNA damage under water atmosphere. They permit in-situ monitoring of the effects of radicals on fully hydrated double-stranded DNA. The results allow us to distinguish direct damage, by photons and secondary low-energy electrons (LEE), from damage by hydroxyl radicals or hydration induced modifications of damage pathways. The exposure of dry DNA to x-rays leads to strand-breaks at the sugar-phosphate backbone, while deoxyribose and nucleobases are less affected. In contrast, a strong increase of DNA damage is observed in water, where OH-radicals are produced. In consequence, base damage and base release become predominant, even though the number of strand-breaks increases further.
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Affiliation(s)
- Marc Benjamin Hahn
- grid.14095.390000 0000 9116 4836Institut für Experimentalphysik, Freie Universität Berlin, Berlin, Germany ,grid.71566.330000 0004 0603 5458Bundesanstalt für Materialforschung und -prüfung, Berlin, Germany
| | | | - Jörg Radnik
- grid.71566.330000 0004 0603 5458Bundesanstalt für Materialforschung und -prüfung, Berlin, Germany
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Hagberg A, Rzhepishevska O, Semenets A, Cisneros DA, Ramstedt M. Surface analysis of bacterial systems using cryo‐X‐ray photoelectron spectroscopy. SURF INTERFACE ANAL 2020. [DOI: 10.1002/sia.6854] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
| | | | - Anastasiia Semenets
- Department of Chemistry, UCMR Umeå University Umeå Sweden
- Department of Microbiology Virology and Biotechnology, Odessa National I.I.Mechnikov University Odessa Ukraine
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Probing Lithium-Ion Battery Electrolytes with Laboratory Near-Ambient Pressure XPS. CRYSTALS 2020. [DOI: 10.3390/cryst10111056] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
In this article, we present Near Ambient Pressure (NAP)-X-ray Photoelectron Spectroscopy (XPS) results from model and commercial liquid electrolytes for lithium-ion battery production using an automated laboratory NAP-XPS system. The electrolyte solutions were (i) LiPF6 in EC/DMC (LP30) as a typical commercial battery electrolyte and (ii) LiTFSI in PC as a model electrolyte. We analyzed the LP30 electrolyte solution, first in its vapor and liquid phase to compare individual core-level spectra. In a second step, we immersed a V2O5 crystal as a model cathode material in this LiPF6 solution. Additionally, the LiTFSI electrolyte model system was studied to compare and verify our findings with previous NAP-XPS data. Photoelectron spectra recorded at pressures of 2–10 mbar show significant chemical differences for the different lithium-based electrolytes. We show the enormous potential of laboratory NAP-XPS instruments for investigations of solid-liquid interfaces in electrochemical energy storage systems at elevated pressures and illustrate the simplicity and ease of the used experimental setup (EnviroESCA).
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