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Yang M, Liu Z, Nie Q, Cheng M, Pei S, Yang D, Cheng C, Guo D. Multicomponent Gas Sensing Fiber Probe System Based on Platinum Coated Capillary Enhanced Raman Spectroscopy. ACS Sens 2024; 9:4591-4598. [PMID: 39240233 DOI: 10.1021/acssensors.4c00606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/07/2024]
Abstract
This paper proposes a novel multicomponent gas-sensing optical fiber probe system. It utilizes a precisely engineered Platinum-coated capillary fabricated via Atomic Layer Deposition (ALD) technology as the core for enhanced Raman spectroscopy, marking the first application of ALD in creating such a structure for gas Raman sensing. The noble metal capillary gas Raman probe demonstrates a low detection limit of 55 ppm for CO2 with a 30 s exposure time and good repeatability in multicomponent gas sensing. The capillary exhibits excellent stability, environmental resistance, and a large core diameter, enabling a rapid gas exchange rate and making it suitable for practical applications.
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Affiliation(s)
- Minghong Yang
- National Engineering Research Center of Fiber Optic Sensing Technology and Networks, Wuhan University of Technology, Wuhan 430070, China
| | - Zhixiong Liu
- National Engineering Research Center of Fiber Optic Sensing Technology and Networks, Wuhan University of Technology, Wuhan 430070, China
- School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
| | - Qilu Nie
- National Engineering Research Center of Fiber Optic Sensing Technology and Networks, Wuhan University of Technology, Wuhan 430070, China
- School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
| | - Mengen Cheng
- National Engineering Research Center of Fiber Optic Sensing Technology and Networks, Wuhan University of Technology, Wuhan 430070, China
- School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
| | - Shilong Pei
- National Engineering Research Center of Fiber Optic Sensing Technology and Networks, Wuhan University of Technology, Wuhan 430070, China
- School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
| | - Dexun Yang
- National Engineering Research Center of Fiber Optic Sensing Technology and Networks, Wuhan University of Technology, Wuhan 430070, China
- School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
| | - Cheng Cheng
- National Engineering Research Center of Fiber Optic Sensing Technology and Networks, Wuhan University of Technology, Wuhan 430070, China
| | - Donglai Guo
- National Engineering Research Center of Fiber Optic Sensing Technology and Networks, Wuhan University of Technology, Wuhan 430070, China
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Frempong SB, Salbreiter M, Mostafapour S, Pistiki A, Bocklitz TW, Rösch P, Popp J. Illuminating the Tiny World: A Navigation Guide for Proper Raman Studies on Microorganisms. Molecules 2024; 29:1077. [PMID: 38474589 DOI: 10.3390/molecules29051077] [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: 12/19/2023] [Revised: 02/13/2024] [Accepted: 02/18/2024] [Indexed: 03/14/2024] Open
Abstract
Raman spectroscopy is an emerging method for the identification of bacteria. Nevertheless, a lot of different parameters need to be considered to establish a reliable database capable of identifying real-world samples such as medical or environmental probes. In this review, the establishment of such reliable databases with the proper design in microbiological Raman studies is demonstrated, shining a light into all the parts that require attention. Aspects such as the strain selection, sample preparation and isolation requirements, the phenotypic influence, measurement strategies, as well as the statistical approaches for discrimination of bacteria, are presented. Furthermore, the influence of these aspects on spectra quality, result accuracy, and read-out are discussed. The aim of this review is to serve as a guide for the design of microbiological Raman studies that can support the establishment of this method in different fields.
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Affiliation(s)
- Sandra Baaba Frempong
- Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich Schiller University, Helmholtzweg 4, 07743 Jena, Germany
- InfectoGnostics Research Campus Jena, Center of Applied Research, Philosophenweg 7, 07743 Jena, Germany
| | - Markus Salbreiter
- Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich Schiller University, Helmholtzweg 4, 07743 Jena, Germany
- InfectoGnostics Research Campus Jena, Center of Applied Research, Philosophenweg 7, 07743 Jena, Germany
| | - Sara Mostafapour
- Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich Schiller University, Helmholtzweg 4, 07743 Jena, Germany
| | - Aikaterini Pistiki
- Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich Schiller University, Helmholtzweg 4, 07743 Jena, Germany
- InfectoGnostics Research Campus Jena, Center of Applied Research, Philosophenweg 7, 07743 Jena, Germany
- Leibniz-Institute of Photonic Technology, Member of the Leibniz Research Alliance-Leibniz Health Technologies, Albert-Einstein-Str. 9, 07745 Jena, Germany
| | - Thomas W Bocklitz
- Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich Schiller University, Helmholtzweg 4, 07743 Jena, Germany
- Leibniz-Institute of Photonic Technology, Member of the Leibniz Research Alliance-Leibniz Health Technologies, Albert-Einstein-Str. 9, 07745 Jena, Germany
| | - Petra Rösch
- Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich Schiller University, Helmholtzweg 4, 07743 Jena, Germany
- InfectoGnostics Research Campus Jena, Center of Applied Research, Philosophenweg 7, 07743 Jena, Germany
| | - Jürgen Popp
- Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich Schiller University, Helmholtzweg 4, 07743 Jena, Germany
- InfectoGnostics Research Campus Jena, Center of Applied Research, Philosophenweg 7, 07743 Jena, Germany
- Leibniz-Institute of Photonic Technology, Member of the Leibniz Research Alliance-Leibniz Health Technologies, Albert-Einstein-Str. 9, 07745 Jena, Germany
- Cluster of Excellence Balance of the Microverse, Friedrich Schiller University Jena, 07743 Jena, Germany
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3
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Salomón RL, Helm J, Gessler A, Grams TEE, Hilman B, Muhr J, Steppe K, Wittmann C, Hartmann H. The quandary of sources and sinks of CO2 efflux in tree stems-new insights and future directions. TREE PHYSIOLOGY 2024; 44:tpad157. [PMID: 38214910 DOI: 10.1093/treephys/tpad157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Accepted: 12/12/2023] [Indexed: 01/13/2024]
Abstract
Stem respiration (RS) substantially contributes to the return of photo assimilated carbon to the atmosphere and, thus, to the tree and ecosystem carbon balance. Stem CO2 efflux (ECO2) is often used as a proxy for RS. However, this metric has often been challenged because of the uncertain origin of CO2 emitted from the stem due to post-respiratory processes. In this Insight, we (i) describe processes affecting the quantification of RS, (ii) review common methodological approaches to quantify and model RS and (iii) develop a research agenda to fill the most relevant knowledge gaps that we identified. Dissolution, transport and accumulation of respired CO2 away from its production site, reassimilation of respired CO2 via stem photosynthesis and the enzyme phosphoenolpyruvate carboxylase, axial CO2 diffusion in the gas phase, shifts in the respiratory substrate and non-respiratory oxygen (O2) consumption are the most relevant processes causing divergence between RS and measured stem gas exchange (ECO2 or O2 influx, IO2). Two common methodological approaches to estimate RS, namely the CO2 mass balance approach and the O2 consumption technique, circumvent some of these processes but have yielded inconsistent results regarding the fate of respired CO2. Stem respiration modelling has recently progressed at the organ and tree levels. However, its implementation in large-scale models, commonly operated from a source-driven perspective, is unlikely to reflect adequate mechanisms. Finally, we propose hypotheses and approaches to advance the knowledge of the stem carbon balance, the role of sap pH on RS, the reassimilation of respired CO2, RS upscaling procedures, large-scale RS modelling and shifts in respiratory metabolism during environmental stress.
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Affiliation(s)
- Roberto L Salomón
- Universidad Politécnica de Madrid (UPM), Departamento de Sistemas y Recursos Naturales, Research Group FORESCENT, Antonio Novais 10, 28040, Madrid, Spain
- Department of Plants and Crops, Laboratory of Plant Ecology, Ghent University, Faculty of Bioscience Engineering, Coupure Links 653, 9000 Ghent, Belgium
| | - Juliane Helm
- Max-Planck-Institute for Biogeochemistry, Biogeochemical Processes, Hans-Knöll-Str. 10, 07743 Jena, Germany
- Department of Environmental Sciences - Botany, Basel University, Schönbeinstr. 6, Basel CH-4056, Switzerland
| | - Arthur Gessler
- Swiss Federal Institute for Forest, Snow and Landscape Research WSL, Zurcherstrasse 111, 8903 Birmensdorf, Switzerland
- Institute of Terrestrial Ecosystems, ETH Zürich, Rämistrasse 101, 8902 Zurich, Switzerland
| | - Thorsten E E Grams
- Technical University of Munich, Ecophysiology of Plants, Land Surface - Atmosphere Interactions, Von-Carlowitz-Platz 2, 85354 Freising, Germany
| | - Boaz Hilman
- Max-Planck-Institute for Biogeochemistry, Biogeochemical Processes, Hans-Knöll-Str. 10, 07743 Jena, Germany
| | - Jan Muhr
- Department of Forest Botany and Tree Physiology, Laboratory for Radioisotopes, Georg-August Universität Göttingen, Büsgenweg 2, 37077 Göttingen, Germany
| | - Kathy Steppe
- Department of Plants and Crops, Laboratory of Plant Ecology, Ghent University, Faculty of Bioscience Engineering, Coupure Links 653, 9000 Ghent, Belgium
| | - Christiane Wittmann
- Faculty of Biology, Botanical Garden, University of Duisburg-Essen, Universitätsstrasse 5, 45117 Essen, Germany
| | - Henrik Hartmann
- Max-Planck-Institute for Biogeochemistry, Biogeochemical Processes, Hans-Knöll-Str. 10, 07743 Jena, Germany
- Institute for Forest Protection, Julius Kühn Institute Federal Research Centre for Cultivated Plants, Erwin-Baur-Straße 27, 06484 Quedlinburg, Germany
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4
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Ge H, Kong W, Wang R, Zhao G, Ma W, Chen W, Wan F. Simple technique of coupling a diode laser into a linear power buildup cavity for Raman gas sensing. OPTICS LETTERS 2023; 48:2186-2189. [PMID: 37058673 DOI: 10.1364/ol.486417] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2023] [Accepted: 03/19/2023] [Indexed: 06/19/2023]
Abstract
We report a novel, to the best of our knowledge, and simple technique to lock a 642 nm multi-quantum well diode laser to an external linear power buildup cavity by directly feeding the cavity reflected light back to the diode laser for enhancement of gas Raman signals. The dominance of the resonant light field in the locking process is achieved by reducing the reflectivity of the cavity input mirror and thus making the intensity of the directly reflected light weaker than that of the resonant light. Compared with traditional techniques, stable power buildup in the fundamental transverse mode TEM00 is guaranteed without any additional optical elements or complex optical arrangements. An intracavity exciting light of 160 W is generated with a 40 mW diode laser. Using a backward Raman light collection geometry, detection limits at the ppm level are achieved for ambient gases (N2, O2) with an exposure time of 60 s.
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5
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Wang P, Chen W, Wang J, Zhou F, Hu J, Zhang Z, Wan F. Hazardous Gas Detection by Cavity-Enhanced Raman Spectroscopy for Environmental Safety Monitoring. Anal Chem 2021; 93:15474-15481. [PMID: 34775758 DOI: 10.1021/acs.analchem.1c03499] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We demonstrate the practicability of cavity-enhanced Raman spectroscopy (CERS) with a folded multipass cavity as a unique tool for the detection of hazardous gases in the atmosphere. A four-mirror Z-sharped multipass cavity results in a greatly extended laser-gas interaction length to improve the Raman signal intensity of gases. For Raman intensity maximization, the optimal number of intracavity beams of a single reflection cycle is calculated and then the cavity parameters are designed. A total of 360 intracavity beams are realized, which are circulated four times in the cavity based on the polarization. ppb-Level Raman gas sensing at atmospheric pressure for several typical explosive gases and toxic gases in ambient air, including hydrogen (H2), methane (CH4), carbon monoxide (CO), hydrogen sulfide (H2S), and chlorine (Cl2), is achieved at 300 s exposure time. Our CERS apparatus, which can detect multiple gases simultaneously with ultrahigh sensitivity and high selectivity, is powerful for detecting hazardous gases in the atmosphere, and it has excellent potential for environmental safety monitoring.
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Affiliation(s)
- Pinyi Wang
- Chongqing University State Key Laboratory of Power Transmission Equipment and System Security and New Technology, Chongqing 400044, China
| | - Weigen Chen
- Chongqing University State Key Laboratory of Power Transmission Equipment and System Security and New Technology, Chongqing 400044, China
| | - Jianxin Wang
- Chongqing University State Key Laboratory of Power Transmission Equipment and System Security and New Technology, Chongqing 400044, China
| | - Feng Zhou
- Chongqing University State Key Laboratory of Power Transmission Equipment and System Security and New Technology, Chongqing 400044, China.,State Grid Jiangsu Electric Power Company Changzhou Power Supply Company, Jiangsu, Nanjing 213000, China
| | - Jin Hu
- Chongqing University State Key Laboratory of Power Transmission Equipment and System Security and New Technology, Chongqing 400044, China.,Electric Power Research Institute of Yunnan Power Grid Company Limited, Yunnan, Kunming 650217, China
| | - Zhixian Zhang
- Chongqing University State Key Laboratory of Power Transmission Equipment and System Security and New Technology, Chongqing 400044, China
| | - Fu Wan
- Chongqing University State Key Laboratory of Power Transmission Equipment and System Security and New Technology, Chongqing 400044, China
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6
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Helm J, Hartmann H, Göbel M, Hilman B, Herrera Ramírez D, Muhr J. Low-cost chamber design for simultaneous CO2 and O2 flux measurements between tree stems and the atmosphere. TREE PHYSIOLOGY 2021; 41:1767-1780. [PMID: 33677590 PMCID: PMC8441941 DOI: 10.1093/treephys/tpab022] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Accepted: 02/02/2021] [Indexed: 05/24/2023]
Abstract
Tree stem CO2 efflux is an important component of ecosystem carbon fluxes and has been the focus of many studies. While CO2 efflux can easily be measured, a growing number of studies have shown that it is not identical with actual in situ respiration. Complementing measurements of CO2 flux with simultaneous measurements of O2 flux provides an additional proxy for respiration, and the combination of both fluxes can potentially help getting closer to actual measures of respiratory fluxes. To date, however, the technical challenge to measure relatively small changes in O2 concentration against its high atmospheric background has prevented routine O2 measurements in field applications. Here, we present a new and low-cost field-tested device for autonomous real-time and quasi-continuous long-term measurements of stem respiration by combining CO2 (NDIR-based) and O2 (quenching-based) sensors in a tree stem chamber. Our device operates as a cyclic-closed system and measures changes in both CO2 and O2 concentration within the chamber over time. The device is battery powered with a >1-week power independence, and data acquisition is conveniently achieved by an internal logger. Results from both field and laboratory tests document that our sensors provide reproducible measurements of CO2 and O2 exchange fluxes under varying environmental conditions.
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Affiliation(s)
| | - Henrik Hartmann
- Max-Planck-Institute for Biogeochemistry, Department of Biogeochemical Processes, Hans-Knöll-Str. 10, 07743 Jena, Germany
| | - Martin Göbel
- Max-Planck-Institute for Biogeochemistry, Department of Biogeochemical Processes, Hans-Knöll-Str. 10, 07743 Jena, Germany
| | - Boaz Hilman
- Max-Planck-Institute for Biogeochemistry, Department of Biogeochemical Processes, Hans-Knöll-Str. 10, 07743 Jena, Germany
| | - David Herrera Ramírez
- Max-Planck-Institute for Biogeochemistry, Department of Biogeochemical Processes, Hans-Knöll-Str. 10, 07743 Jena, Germany
| | - Jan Muhr
- Max-Planck-Institute for Biogeochemistry, Department of Biogeochemical Processes, Hans-Knöll-Str. 10, 07743 Jena, Germany
- Georg-August University Göttingen, Department of Bioclimatology, Büsgenweg 2, 37077 Göttingen, Germany
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7
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Maity A, Maithani S, Pradhan M. Cavity Ring-Down Spectroscopy: Recent Technological Advancements, Techniques, and Applications. Anal Chem 2020; 93:388-416. [DOI: 10.1021/acs.analchem.0c04329] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Abhijit Maity
- Department of Chemical, Biological and Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences, Salt Lake, JD Block, Sector III, Kolkata 700106, India
- Technical Research Centre, S. N. Bose National Centre for Basic Sciences, Salt Lake, JD Block, Sector III, Kolkata 700106, India
| | - Sanchi Maithani
- Department of Chemical, Biological and Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences, Salt Lake, JD Block, Sector III, Kolkata 700106, India
| | - Manik Pradhan
- Department of Chemical, Biological and Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences, Salt Lake, JD Block, Sector III, Kolkata 700106, India
- Technical Research Centre, S. N. Bose National Centre for Basic Sciences, Salt Lake, JD Block, Sector III, Kolkata 700106, India
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8
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Guo J, Liu Y, Yang Y, Li Y, Wang R, Ju H. A Filter Supported Surface-Enhanced Raman Scattering "Nose" for Point-of-Care Monitoring of Gaseous Metabolites of Bacteria. Anal Chem 2020; 92:5055-5063. [PMID: 32129599 DOI: 10.1021/acs.analchem.9b05400] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
This work designs a convenient method for fabrication of surface-enhanced Raman scattering (SERS) devices by loading gold nanostars (AuNSs) on a flat filter support with vacuum filtration. The dense accumulation of AuNSs results in a strong sensitization to SERS signal and shows sensitive response to gaseous metabolites of bacteria, which produces a SERS "nose" for rapid point-of-care monitoring of these metabolites. The "nose" shows good reproducibility and stability and can be used for SERS quantitation of a gaseous target with Raman signal. The impressive performance of the proposed SERS "nose" for detecting gaseous metabolites of common foodborne bacteria like Escherichia coli, Staphylococcus aureus, and Pseudomonas aeruginosa from inoculated samples demonstrates its much higher sensitivity than that of human sense and application in distinguishing spoiled food at an early stage and real-time tracing of food spoilage degree. The strong point-of-care testing ability of the designed SERS "nose" and the miniaturization of whole equipment extend greatly the analytical application of SERS technology in food safety and public health.
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Affiliation(s)
- Jingxing Guo
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, P. R. China
| | - Ying Liu
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, P. R. China
| | - Yuanjiao Yang
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, P. R. China
| | - Yumei Li
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing 210023, P. R. China
| | - Ruiyong Wang
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing 210023, P. R. China
| | - Huangxian Ju
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, P. R. China
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9
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Wang P, Chen W, Wan F, Wang J, Hu J. Cavity-enhanced Raman spectroscopy with optical feedback frequency-locking for gas sensing. OPTICS EXPRESS 2019; 27:33312-33325. [PMID: 31878402 DOI: 10.1364/oe.27.033312] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Accepted: 10/09/2019] [Indexed: 06/10/2023]
Abstract
A cavity-enhanced Raman spectroscopy (CERS) gas-sensing method is introduced. Using optical feedback frequency-locking, laser radiation provided by a diode laser is coupled into a three-mirror V-shaped optical cavity. An intracavity laser power of 92 W is realized, yielding a power gain factor of 2200. Raman spectrums of air, carbon dioxide, and acetylene are recorded as a demonstration. Multicomponent gas mixtures including isotopic gases can be simultaneously sensed by CERS. With 200 s exposure time, detection limits of 5.35 Pa for N2, 5.07 Pa for O2, 1.74 Pa for CO2, and 0.58 Pa for C2H2 are achieved. CERS is a powerful gas-sensing method with high selectivity and sensitivity, which also has the potential for quantitative analysis of gases with high accuracy.
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10
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Yan D, Frosch T, Kobelke J, Bierlich J, Popp J, Pletz MW, Frosch T. Fiber-Enhanced Raman Sensing of Cefuroxime in Human Urine. Anal Chem 2018; 90:13243-13248. [PMID: 30387601 DOI: 10.1021/acs.analchem.8b01355] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Fiber-enhanced Raman spectroscopy was developed for the chemically selective and sensitive quantification of the important antibiotic cefuroxime in human urine. A novel optical sensor fiber was drawn and precisely prepared. In this fiber structure, light is strongly confined in the selectively filled liquid core, and the Raman scattered signal is collected with unprecedented efficiency over an extended interaction length. The filling, emptying, and robustness are highly improved due to the large core size (>30 μm). Broadband step-index guidance allows the free choice of the most suitable excitation wavelength in complex body fluids. The limit of detection of cefuroxime in human urine was improved by 2 orders of magnitude (to μM level). The quantification of cefuroxime was achieved in urine after oral administration. This method has great potential for the point-of-care monitoring of antibiotics concentrations and is an important step forward to enable clinicians to rapidly adjust doses.
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Affiliation(s)
- Di Yan
- Leibniz Institute of Photonic Technology , Jena 07745 , Germany
| | - Timea Frosch
- Leibniz Institute of Photonic Technology , Jena 07745 , Germany
| | - Jens Kobelke
- Leibniz Institute of Photonic Technology , Jena 07745 , Germany
| | - Jörg Bierlich
- Leibniz Institute of Photonic Technology , Jena 07745 , Germany
| | - Jürgen Popp
- Leibniz Institute of Photonic Technology , Jena 07745 , Germany.,Friedrich Schiller University , Institute of Physical Chemistry , Jena 07743 , Germany.,Friedrich Schiller University , Abbe Centre of Photonics , Jena 07745 , Germany
| | - Mathias W Pletz
- Center for Infectious Diseases and Infection Control , Jena University Hospital , Jena 07740 , Germany
| | - Torsten Frosch
- Leibniz Institute of Photonic Technology , Jena 07745 , Germany.,Friedrich Schiller University , Institute of Physical Chemistry , Jena 07743 , Germany.,Friedrich Schiller University , Abbe Centre of Photonics , Jena 07745 , Germany
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11
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Yan D, Popp J, Frosch T. Analysis of Fiber-Enhanced Raman Gas Sensing Based on Raman Chemical Imaging. Anal Chem 2017; 89:12269-12275. [DOI: 10.1021/acs.analchem.7b03209] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Di Yan
- Leibniz Institute of Photonic Technology, 07745 Jena, Germany
| | - Jürgen Popp
- Leibniz Institute of Photonic Technology, 07745 Jena, Germany
- Friedrich Schiller University, Institute of Physical
Chemistry, 07743 Jena, Germany
- Friedrich Schiller University, Abbe Center of Photonics, 07745 Jena, Germany
| | - Torsten Frosch
- Leibniz Institute of Photonic Technology, 07745 Jena, Germany
- Friedrich Schiller University, Institute of Physical
Chemistry, 07743 Jena, Germany
- Friedrich Schiller University, Abbe Center of Photonics, 07745 Jena, Germany
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12
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Jochum T, Rahal L, Suckert RJ, Popp J, Frosch T. All-in-one: a versatile gas sensor based on fiber enhanced Raman spectroscopy for monitoring postharvest fruit conservation and ripening. Analyst 2017; 141:2023-9. [PMID: 26882863 DOI: 10.1039/c5an02120k] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In today's fruit conservation rooms the ripening of harvested fruit is delayed by precise management of the interior oxygen (O2) and carbon dioxide (CO2) levels. Ethylene (C2H4), a natural plant hormone, is commonly used to trigger fruit ripening shortly before entering the market. Monitoring of these critical process gases, also of the increasingly favored cooling agent ammonia (NH3), is a crucial task in modern postharvest fruit management. The goal of this work was to develop and characterize a gas sensor setup based on fiber enhanced Raman spectroscopy for fast (time resolution of a few minutes) and non-destructive process gas monitoring throughout the complete postharvest production chain encompassing storage and transport in fruit conservation chambers as well as commercial fruit ripening in industrial ripening rooms. Exploiting a micro-structured hollow-core photonic crystal fiber for analyte gas confinement and sensitivity enhancement, the sensor features simultaneous quantification of O2, CO2, NH3 and C2H4 without cross-sensitivity in just one single measurement. Laboratory measurements of typical fruit conservation gas mixtures showed that the sensor is capable of quantifying O2 and CO2 concentration levels with accuracy of 3% or less with respect to reference concentrations. The sensor detected ammonia concentrations, relevant for chemical alarm purposes. Due to the high spectral resolution of the gas sensor, ethylene could be quantified simultaneously with O2 and CO2 in a multi-component mixture. These results indicate that fiber enhanced Raman sensors have a potential to become universally usable on-site gas sensors for controlled atmosphere applications in postharvest fruit management.
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Affiliation(s)
- Tobias Jochum
- Leibniz Institute of Photonic Technology, Jena, Germany
| | - Leila Rahal
- Leibniz Institute of Photonic Technology, Jena, Germany
| | | | - Jürgen Popp
- Leibniz Institute of Photonic Technology, Jena, Germany and Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich Schiller University, Jena, Germany.
| | - Torsten Frosch
- Leibniz Institute of Photonic Technology, Jena, Germany and Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich Schiller University, Jena, Germany.
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13
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Jochum T, Fastnacht A, Trumbore SE, Popp J, Frosch T. Direct Raman Spectroscopic Measurements of Biological Nitrogen Fixation under Natural Conditions: An Analytical Approach for Studying Nitrogenase Activity. Anal Chem 2016; 89:1117-1122. [PMID: 28043118 DOI: 10.1021/acs.analchem.6b03101] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Biological N2 fixation is a major input of bioavailable nitrogen, which represents the most frequent factor limiting the agricultural production throughout the world. Especially, the symbiotic association between legumes and Rhizobium bacteria can provide substantial amounts of nitrogen (N) and reduce the need for industrial fertilizers. Despite its importance in the global N cycle, rates of biological nitrogen fixation have proven difficult to quantify. In this work, we propose and demonstrate a simple analytical approach to measure biological N2 fixation rates directly without a proxy or isotopic labeling. We determined a mean N2 fixation rate of 78 ± 5 μmol N2 (g dry weight nodule)-1 h-1 of a Medicago sativa-Rhizobium consortium by continuously analyzing the amount of atmospheric N2 in static environmental chambers with Raman gas spectroscopy. By simultaneously analyzing the CO2 uptake and photosynthetic plant activity, we think that a minimum CO2 mixing ratio might be needed for natural N2 fixation and only used the time interval above this minimum CO2 mixing ratio for N2 fixation rate calculations. The proposed approach relies only on noninvasive measurements of the gas phase and, given its simplicity, indicates the potential to estimate biological nitrogen fixation of legume symbioses not only in laboratory experiments. The same methods can presumably also be used to detect N2 fluxes by denitrification from ecosystems to the atmosphere.
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Affiliation(s)
- Tobias Jochum
- Leibniz Institute of Photonic Technology , 07745 Jena, Germany
| | - Agnes Fastnacht
- Max Planck Institute for Biogeochemistry , 07745 Jena, Germany
| | | | - Jürgen Popp
- Leibniz Institute of Photonic Technology , 07745 Jena, Germany.,Institute of Physical Chemistry and Abbe Center of Photonics , 07745 Jena, Germany
| | - Torsten Frosch
- Leibniz Institute of Photonic Technology , 07745 Jena, Germany.,Institute of Physical Chemistry and Abbe Center of Photonics , 07745 Jena, Germany
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Hartmann H, Trumbore S. Understanding the roles of nonstructural carbohydrates in forest trees - from what we can measure to what we want to know. THE NEW PHYTOLOGIST 2016; 211:386-403. [PMID: 27061438 DOI: 10.1111/nph.13955] [Citation(s) in RCA: 289] [Impact Index Per Article: 36.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2016] [Accepted: 03/01/2016] [Indexed: 05/17/2023]
Abstract
Contents 386 I. 386 II. 388 III. 392 IV. 392 V. 396 VI. 399 399 References 399 SUMMARY: Carbohydrates provide the building blocks for plant structures as well as versatile resources for metabolic processes. The nonstructural carbohydrates (NSC), mainly sugars and starch, fulfil distinct functional roles, including transport, energy metabolism and osmoregulation, and provide substrates for the synthesis of defence compounds or exchange with symbionts involved in nutrient acquisition or defence. At the whole-plant level, NSC storage buffers the asynchrony of supply and demand on diel, seasonal or decadal temporal scales and across plant organs. Despite its central role in plant function and in stand-level carbon cycling, our understanding of storage dynamics, its controls and response to environmental stresses is very limited, even after a century of research. This reflects the fact that often storage is defined by what we can measure, that is, NSC concentrations, and the interpretation of these as a proxy for a single function, storage, rather than the outcome of a range of NSC source and sink functions. New isotopic tools allow direct quantification of timescales involved in NSC dynamics, and show that NSC-C fixed years to decades previously is used to support tree functions. Here we review recent advances, with emphasis on the context of the interactions between NSC, drought and tree mortality.
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Affiliation(s)
- Henrik Hartmann
- Max-Planck Institute for Biogeochemistry, Hans Knöll Str. 10, 07745, Jena, Germany
| | - Susan Trumbore
- Max-Planck Institute for Biogeochemistry, Hans Knöll Str. 10, 07745, Jena, Germany
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Yu A, Zuo D, Li B, Gao J, Wang X. Parabolic cell for low-background Raman analysis of gas samples. APPLIED OPTICS 2016; 55:3650-3655. [PMID: 27140384 DOI: 10.1364/ao.55.003650] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A compact Raman system constructed by a parabolic sample cell and an imaging spectrograph, which has good capability for enhancing a Raman signal and compressing a continuous background, has been put forward. In the Raman spectra of ambient air acquired by this system, the signal level of N2 was enhanced up to 14 times compared with free space, and the related signal to background ratio was increased nearly to 96. With an integration time of 10 s, the rotational fine structure of O2 and N2 were clearly recognized. Besides, a standard analytic gas mixture consisting of H2, CO2, and CO was also tested, and the 3σ LODs of 68 ppm for H2, 54 ppm for CO2 and 116 ppm for CO were obtained.
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16
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Fiber-enhanced Raman multi-gas spectroscopy: what is the potential of its application to breath analysis? Bioanalysis 2015; 7:281-4. [PMID: 25697186 DOI: 10.4155/bio.14.299] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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17
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Jochum T, von Fischer JC, Trumbore S, Popp J, Frosch T. Multigas Leakage Correction in Static Environmental Chambers Using Sulfur Hexafluoride and Raman Spectroscopy. Anal Chem 2015; 87:11137-42. [PMID: 26492154 DOI: 10.1021/acs.analchem.5b03312] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In static environmental chamber experiments, the precision of gas flux measurements can be significantly improved by a thorough gas leakage correction to avoid under- or overestimation of biological activity such as respiration or photosynthesis. Especially in the case of small biological net gas exchange rates or gas accumulation phases during long environmental monitoring experiments, gas leakage fluxes could distort the analysis of the biogenic gas kinetics. Here we propose and demonstrate a general protocol for online correction of diffusion-driven gas leakage in plant chambers by simultaneous quantification of the inert tracer sulfur hexafluoride (SF6) and the investigated biogenic gases using enhanced Raman spectroscopy. By quantifying the leakage rates of carbon dioxide (CO2), methane (CH4), and hydrogen (H2) simultaneously with SF6 in the test chamber, their effective diffusivity ratios of approximately 1.60, 1.96, and 5.65 were determined, each related to SF6. Because our experiments suggest that the effective diffusivity ratios are reproducible for an individual static environmental chamber, even under varying concentration gradients and slight changes of the chamber sealing, an experimental method to quantify gas leakage fluxes by using effective diffusivity ratios and SF6 leakage fluxes is proposed. The method is demonstrated by quantifying the CO2 net exchange rate of a plant-soil ecosystem (Mirabilis jalapa). By knowing the effective chamber diffusivity ratio CO2/SF6 and the measured SF6 leakage rate during the experiment, the leakage contribution to the total CO2 exchange rate could be calculated and the biological net CO2 concentration change within the chamber atmosphere determined.
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Affiliation(s)
- Tobias Jochum
- Leibniz Institute of Photonic Technology , Jena 07745, Germany
| | - Joseph C von Fischer
- Department of Biology and Graduate Degree Program in Ecology, Colorado State University , Fort Collins, Colorado 80523, United States
| | - Susan Trumbore
- Max Planck Institute for Biogeochemistry , Jena 07745, Germany
| | - Jürgen Popp
- Leibniz Institute of Photonic Technology , Jena 07745, Germany.,Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich Schiller University , Jena 07743, Germany
| | - Torsten Frosch
- Leibniz Institute of Photonic Technology , Jena 07745, Germany.,Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich Schiller University , Jena 07743, Germany
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18
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Brückner M, Becker K, Popp J, Frosch T. Fiber array based hyperspectral Raman imaging for chemical selective analysis of malaria-infected red blood cells. Anal Chim Acta 2015; 894:76-84. [PMID: 26423630 DOI: 10.1016/j.aca.2015.08.025] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2015] [Revised: 08/08/2015] [Accepted: 08/13/2015] [Indexed: 10/23/2022]
Abstract
A new setup for Raman spectroscopic wide-field imaging is presented. It combines the advantages of a fiber array based spectral translator with a tailor-made laser illumination system for high-quality Raman chemical imaging of sensitive biological samples. The Gaussian-like intensity distribution of the illuminating laser beam is shaped by a square-core optical multimode fiber to a top-hat profile with very homogeneous intensity distribution to fulfill the conditions of Koehler. The 30 m long optical fiber and an additional vibrator efficiently destroy the polarization and coherence of the illuminating light. This homogeneous, incoherent illumination is an essential prerequisite for stable quantitative imaging of complex biological samples. The fiber array translates the two-dimensional lateral information of the Raman stray light into separated spectral channels with very high contrast. The Raman image can be correlated with a corresponding white light microscopic image of the sample. The new setup enables simultaneous quantification of all Raman spectra across the whole spatial area with very good spectral resolution and thus outperforms other Raman imaging approaches based on scanning and tunable filters. The unique capabilities of the setup for fast, gentle, sensitive, and selective chemical imaging of biological samples were applied for automated hemozoin analysis. A special algorithm was developed to generate Raman images based on the hemozoin distribution in red blood cells without any influence from other Raman scattering. The new imaging setup in combination with the robust algorithm provides a novel, elegant way for chemical selective analysis of the malaria pigment hemozoin in early ring stages of Plasmodium falciparum infected erythrocytes.
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Affiliation(s)
| | - Katja Becker
- Justus Liebig University Giessen, Biochemistry and Molecular Biology, 35392 Giessen, Germany
| | - Jürgen Popp
- Leibniz Institute of Photonic Technology, 07745 Jena, Germany; Friedrich Schiller University Jena, Institute for Physical Chemistry, 07745 Jena, Germany; Friedrich Schiller University Jena, Abbe Centre of Photonics, 07745 Jena, Germany
| | - Torsten Frosch
- Leibniz Institute of Photonic Technology, 07745 Jena, Germany; Friedrich Schiller University Jena, Institute for Physical Chemistry, 07745 Jena, Germany; Friedrich Schiller University Jena, Abbe Centre of Photonics, 07745 Jena, Germany.
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19
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Fischer S, Hanf S, Frosch T, Gleixner G, Popp J, Trumbore S, Hartmann H. Pinus sylvestris switches respiration substrates under shading but not during drought. THE NEW PHYTOLOGIST 2015; 207:542-550. [PMID: 25944481 DOI: 10.1111/nph.13452] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2015] [Accepted: 04/13/2015] [Indexed: 06/04/2023]
Abstract
Reduced carbon (C) assimilation during prolonged drought forces trees to rely on stored C to maintain vital processes like respiration. It has been shown, however, that the use of carbohydrates, a major C storage pool and apparently the main respiratory substrate in plants, strongly declines with decreasing plant hydration. Yet no empirical evidence has been produced to what degree other C storage compounds like lipids and proteins may fuel respiration during drought. We exposed young scots pine trees to C limitation using either drought or shading and assessed respiratory substrate use by monitoring the respiratory quotient, δ(13) C of respired CO2 and concentrations of the major storage compounds, that is, carbohydrates, lipids and amino acids. Only shaded trees shifted from carbohydrate-dominated to lipid-dominated respiration and showed progressive carbohydrate depletion. In drought trees, the fraction of carbohydrates used in respiration did not decline but respiration rates were strongly reduced. The lower consumption and potentially allocation from other organs may have caused initial carbohydrate content to remain constant during the experiment. Our results suggest that respiratory substrates other than carbohydrates are used under carbohydrate limitation but not during drought. Thus, respiratory substrate shift cannot provide an efficient means to counterbalance C limitation under natural drought.
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Affiliation(s)
- Sarah Fischer
- Max-Planck Institute for Biogeochemistry, Hans Knoll Str. 10, 07745, Jena, Germany
| | - Stefan Hanf
- Leibniz Institute of Photonic Technology, Albert-Einstein-Straße 9, 07745, Jena, Germany
| | - Torsten Frosch
- Leibniz Institute of Photonic Technology, Albert-Einstein-Straße 9, 07745, Jena, Germany
- Institute for Physical Chemistry, Friedrich Schiller University, Helmholtzweg 4, 07743, Jena, Germany
| | - Gerd Gleixner
- Max-Planck Institute for Biogeochemistry, Hans Knoll Str. 10, 07745, Jena, Germany
| | - Jürgen Popp
- Leibniz Institute of Photonic Technology, Albert-Einstein-Straße 9, 07745, Jena, Germany
- Institute for Physical Chemistry, Friedrich Schiller University, Helmholtzweg 4, 07743, Jena, Germany
- Abbe Center of Photonics, Friedrich Schiller University, Helmholtzweg 4, 07743, Jena, Germany
| | - Susan Trumbore
- Max-Planck Institute for Biogeochemistry, Hans Knoll Str. 10, 07745, Jena, Germany
| | - Henrik Hartmann
- Max-Planck Institute for Biogeochemistry, Hans Knoll Str. 10, 07745, Jena, Germany
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Li Q, Csetenyi L, Paton GI, Gadd GM. CaCO3and SrCO3bioprecipitation by fungi isolated from calcareous soil. Environ Microbiol 2015; 17:3082-97. [DOI: 10.1111/1462-2920.12954] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2015] [Revised: 06/09/2015] [Accepted: 06/10/2015] [Indexed: 01/30/2023]
Affiliation(s)
- Qianwei Li
- Geomicrobiology Group; College of Life Sciences; University of Dundee; Dundee DD1 5EH Scotland UK
| | - Laszlo Csetenyi
- Concrete Technology Group; Department of Civil Engineering; University of Dundee; Dundee DD1 4HN Scotland UK
| | - Graeme Iain Paton
- Institute of Biological and Environmental Sciences; University of Aberdeen; Aberdeen AB24 3UU Scotland UK
| | - Geoffrey Michael Gadd
- Geomicrobiology Group; College of Life Sciences; University of Dundee; Dundee DD1 5EH Scotland UK
- Laboratory of Environmental Pollution and Bioremediation; Xinjiang Institute of Ecology and Geography; Chinese Academy of Sciences; Urumqi 830011 China
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21
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Jochum T, Michalzik B, Bachmann A, Popp J, Frosch T. Microbial respiration and natural attenuation of benzene contaminated soils investigated by cavity enhanced Raman multi-gas spectroscopy. Analyst 2015; 140:3143-9. [PMID: 25751376 DOI: 10.1039/c5an00091b] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Soil and groundwater contamination with benzene can cause serious environmental damage. However, many soil microorganisms are capable to adapt and are known to strongly control the fate of organic contamination. Innovative cavity enhanced Raman multi-gas spectroscopy (CERS) was applied to investigate the short-term response of the soil micro-flora to sudden surface contamination with benzene regarding the temporal variations of gas products and their exchange rates with the adjacent atmosphere. (13)C-labeled benzene was spiked on a silty-loamy soil column in order to track and separate the changes in heterotrophic soil respiration - involving (12)CO2 and O2- from the natural attenuation process of benzene degradation to ultimately form (13)CO2. The respiratory quotient (RQ) decreased from a value 0.98 to 0.46 directly after the spiking and increased again within 33 hours to a value of 0.72. This coincided with the maximum (13)CO2 concentration rate (0.63 μmol m(-2) s(-1)), indicating the highest benzene degradation at 33 hours after the spiking event. The diffusion of benzene in the headspace and the biodegradation into (13)CO2 were simultaneously monitored and 12 days after the benzene spiking no measurable degradation was detected anymore. The RQ finally returned to a value of 0.96 demonstrating the reestablished aerobic respiration.
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Affiliation(s)
- Tobias Jochum
- Leibniz Institute of Photonic Technology, Jena, Germany.
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22
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Keiner R, Herrmann M, Küsel K, Popp J, Frosch T. Rapid monitoring of intermediate states and mass balance of nitrogen during denitrification by means of cavity enhanced Raman multi-gas sensing. Anal Chim Acta 2015; 864:39-47. [PMID: 25732425 DOI: 10.1016/j.aca.2015.02.007] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2014] [Revised: 01/29/2015] [Accepted: 02/05/2015] [Indexed: 11/18/2022]
Abstract
The comprehensive investigation of changes in N cycling has been challenging so far due to difficulties with measuring gases such as N2 and N2O simultaneously. In this study we introduce cavity enhanced Raman gas spectroscopy as a new analytical methodology for tracing the stepwise reduction of (15)N-labelled nitrate by the denitrifying bacteria Pseudomonas stutzeri. The unique capabilities of Raman multi-gas analysis enabled real-time, continuous, and non-consumptive quantification of the relevant gases ((14)N2, (14)N2O, O2, and CO2) and to trace the fate of (15)N-labeled nitrate substrate ((15)N2, (15)N2O) added to a P. stutzeri culture with one single measurement. Using this new methodology, we could quantify the kinetics of the formation and degradation for all gaseous compounds (educts and products) and thus study the reaction orders. The gas quantification was complemented with the analysis of nitrate and nitrite concentrations for the online monitoring of the total nitrogen element budget. The simultaneous quantification of all gases also enabled the contactless and sterile online acquisition of the pH changes in the P. stutzeri culture by the stoichiometry of the redox reactions during denitrification and the CO2-bicarbonate equilibrium. Continuous pH monitoring - without the need to insert an electrode into solution - elucidated e.g. an increase in the slope of the pH value coinciding with an accumulation of nitrite, which in turn led to a temporary accumulation of N2O, due to an inhibition of nitrous oxide reductase. Cavity enhanced Raman gas spectroscopy has a high potential for the assessment of denitrification processes and can contribute substantially to our understanding of nitrogen cycling in both natural and agricultural systems.
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Affiliation(s)
- Robert Keiner
- Institute of Physical Chemistry, Friedrich Schiller University Jena, Jena 07743, Germany; Leibniz Institute of Photonic Technology, Jena 07745, Germany
| | - Martina Herrmann
- Institute of Ecology, Friedrich Schiller University Jena, Jena 07743, Germany; German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Leipzig 04103, Germany
| | - Kirsten Küsel
- Institute of Ecology, Friedrich Schiller University Jena, Jena 07743, Germany; German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Leipzig 04103, Germany
| | - Jürgen Popp
- Institute of Physical Chemistry, Friedrich Schiller University Jena, Jena 07743, Germany; Leibniz Institute of Photonic Technology, Jena 07745, Germany; InfectoGnostics Forschungscampus, Zentrum für Angewandte Forschung, Jena 07743, Germany; Abbe School of Photonics, Friedrich Schiller University, Jena, Germany
| | - Torsten Frosch
- Institute of Physical Chemistry, Friedrich Schiller University Jena, Jena 07743, Germany; Leibniz Institute of Photonic Technology, Jena 07745, Germany; InfectoGnostics Forschungscampus, Zentrum für Angewandte Forschung, Jena 07743, Germany.
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Kumar S, Matange N, Umapathy S, Visweswariah SS. Linking carbon metabolism to carotenoid production in mycobacteria using Raman spectroscopy. FEMS Microbiol Lett 2015; 362:1-6. [DOI: 10.1093/femsle/fnu048] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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24
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Raman spectroscopic investigation of 13CO 2 labeling and leaf dark respiration of Fagus sylvatica L. (European beech). Anal Bioanal Chem 2015; 407:1813-7. [PMID: 25577365 DOI: 10.1007/s00216-014-8446-8] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2014] [Revised: 11/27/2014] [Accepted: 12/22/2014] [Indexed: 10/24/2022]
Abstract
An important issue, in times of climate change and more extreme weather events, is the investigation of forest ecosystem reactions to these events. Longer drought periods stress the vitality of trees and promote mass insect outbreaks, which strongly affect ecosystem processes and services. Cavity-enhanced Raman gas spectrometry was applied for online multi-gas analysis of the gas exchange rates of O2 and CO2 and the labeling of Fagus sylvatica L. (European beech) seedlings with (13)CO2. The rapid monitoring of all these gases simultaneously allowed for the separation of photosynthetic uptake of CO2 by the beech seedlings and a constant (12)CO2 efflux via respiration and thus for a correction of the measured (12)CO2 concentrations in course of the labeling experiment. The effects of aphid infestation with the woolly beech aphid (Phyllaphis fagi L.) as well as the effect of a drought period on the respirational gas exchange were investigated. A slightly decreased respirational activity of drought-stressed seedlings in comparison to normally watered seedlings was found already for a low drought intensity. Cavity-enhanced Raman gas monitoring of O2, (12)CO2, and (13)CO2 was proven to be a powerful new tool for studying the effect of drought stress and aphid infestation on the respirational activity of European beech seedlings as an example of important forest species in Central Europe.
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Hanf S, Fischer S, Hartmann H, Keiner R, Trumbore S, Popp J, Frosch T. Online investigation of respiratory quotients in Pinus sylvestris and Picea abies during drought and shading by means of cavity-enhanced Raman multi-gas spectrometry. Analyst 2015; 140:4473-81. [DOI: 10.1039/c5an00402k] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
CERS monitoring of RQ values enables the analysis of nutrition shifts in trees in response to environmental stress.
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Affiliation(s)
- Stefan Hanf
- Leibniz Institute of Photonic Technology
- Jena
- Germany
- Max Planck Institute for Biogeochemistry
- Jena
| | | | | | | | | | - Jürgen Popp
- Leibniz Institute of Photonic Technology
- Jena
- Germany
- Friedrich Schiller University
- Institute for Physical Chemistry
| | - Torsten Frosch
- Leibniz Institute of Photonic Technology
- Jena
- Germany
- Friedrich Schiller University
- Institute for Physical Chemistry
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26
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Hanf S, Bögözi T, Keiner R, Frosch T, Popp J. Fast and Highly Sensitive Fiber-Enhanced Raman Spectroscopic Monitoring of Molecular H2 and CH4 for Point-of-Care Diagnosis of Malabsorption Disorders in Exhaled Human Breath. Anal Chem 2014; 87:982-8. [DOI: 10.1021/ac503450y] [Citation(s) in RCA: 107] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Stefan Hanf
- Leibniz Institute of Photonic Technology, Jena 07745, Germany
- Max Planck Institute for Biogeochemistry, Jena 07745, Germany
| | - Timea Bögözi
- Leibniz Institute of Photonic Technology, Jena 07745, Germany
| | - Robert Keiner
- Leibniz Institute of Photonic Technology, Jena 07745, Germany
| | - Torsten Frosch
- Leibniz Institute of Photonic Technology, Jena 07745, Germany
- Institute for Physical Chemistry, Friedrich Schiller University, Jena 07745, Germany
| | - Jürgen Popp
- Leibniz Institute of Photonic Technology, Jena 07745, Germany
- Institute for Physical Chemistry, Friedrich Schiller University, Jena 07745, Germany
- Abbe Center of Photonics, Friedrich Schiller University, Jena 07745, Germany
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Hanf S, Keiner R, Yan D, Popp J, Frosch T. Fiber-enhanced Raman multigas spectroscopy: a versatile tool for environmental gas sensing and breath analysis. Anal Chem 2014; 86:5278-85. [PMID: 24846710 DOI: 10.1021/ac404162w] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Versatile multigas analysis bears high potential for environmental sensing of climate relevant gases and noninvasive early stage diagnosis of disease states in human breath. In this contribution, a fiber-enhanced Raman spectroscopic (FERS) analysis of a suite of climate relevant atmospheric gases is presented, which allowed for reliable quantification of CH4, CO2, and N2O alongside N2 and O2 with just one single measurement. A highly improved analytical sensitivity was achieved, down to a sub-parts per million limit of detection with a high dynamic range of 6 orders of magnitude and within a second measurement time. The high potential of FERS for the detection of disease markers was demonstrated with the analysis of 27 nL of exhaled human breath. The natural isotopes (13)CO2 and (14)N(15)N were quantified at low levels, simultaneously with the major breath components N2, O2, and (12)CO2. The natural abundances of (13)CO2 and (14)N(15)N were experimentally quantified in very good agreement to theoretical values. A fiber adapter assembly and gas filling setup was designed for rapid and automated analysis of multigas compositions and their fluctuations within seconds and without the need for optical readjustment of the sensor arrangement. On the basis of the abilities of such miniaturized FERS system, we expect high potential for the diagnosis of clinically administered (13)C-labeled CO2 in human breath and also foresee high impact for disease detection via biologically vital nitrogen compounds.
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Affiliation(s)
- Stefan Hanf
- Leibniz Institute of Photonic Technology , Jena, Germany
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