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Shoshanim O, Baratz A. A new fluorescence-based methodology for studying bioaerosol scavenging processes using a hyperspectral LIF-LIDAR remote sensing system. ENVIRONMENTAL RESEARCH 2023; 217:114859. [PMID: 36427632 DOI: 10.1016/j.envres.2022.114859] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Revised: 11/16/2022] [Accepted: 11/17/2022] [Indexed: 06/16/2023]
Abstract
This paper presents a novel experimental approach to in-situ study of atmospheric phenomena such as nucleation scavenging by biological seeds, bio-droplet dehydration, and bioaerosol's particle scavenging by raindrops. Our methodology is based on the analysis of the dynamical changes of fluorescence signal. We use a remote sensing system based on a homebuilt hyperspectral laser induced fluorescence (LIF) Lidar to measure the transient back-fluorescence and backscattering signals. The spectral line shape of the transient fluorescence associated with an aerosolized tryptophan solution was first analyzed in the laboratory. It then used to study bioaerosol phase transitions between wet and dry conditions. The experiments were first conducted in a dynamic aerosol cell where we repetitively create and monitor the droplets containing bioaerosol cloud starting from its early formation till its total evaporation. The LIF-Lidar was used to simultaneously measure back-fluorescence, scattering and transmission. These measurements were synchronized with the generation of droplets containing bioaerosol and with the monitoring of aerosol's size distribution and ambient conditions. A novel optical receiver design was used to simultaneously detect both back-fluorescence polarization components. Results showed that along with droplet's evaporation process, bioaerosol's fluorescence spectrum exhibit a blue shift, known as the dynamic Stokes-shifts, of ∼2000 cm-1 and an increase in its fluorescence anisotropy. To the best of our knowledge, this is the first report of fluorescence Stokes-shifts and anisotropy within microdroplets containing a biological solution due to wet-dry phase transitions. This method was also used to quantify scavenging of biological particle by raindrops from 100 m. It shows that valuable information can be derived from analyzing the fluorescence spectrum of bioaerosol within a cloud and demonstrate the potential of a LIF-LIDAR remote system to perform in-situ studies of scavenging processes.
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Affiliation(s)
- Ofir Shoshanim
- Department of Environmental Physics, Israel Institute for Biological Research (IIBR), Ness-Ziona, 74100, Israel.
| | - Adva Baratz
- Department of Analytical Chemistry, Israel Institute for Biological Research (IIBR), Ness-Ziona, 74100, Israel
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2
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Yue S, Li L, Xu W, Zhao J, Ren H, Ji D, Li P, Zhang Q, Wei L, Xie Q, Pan X, Wang Z, Sun Y, Fu P. Biological and Nonbiological Sources of Fluorescent Aerosol Particles in the Urban Atmosphere. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:7588-7597. [PMID: 35544717 DOI: 10.1021/acs.est.1c07966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Online detection of bioaerosols based on the light-induced fluorescence (LIF) technique is still challenging due to the complexity of bioaerosols and the external/internal mixing with nonbiological fluorescent compositions. Although many lab studies have measured the fluorescence properties of the biological and nonbiological materials, there is still a scarcity of knowledge of the sources of fluorescent aerosol particles (FAP) in the ambient atmosphere. Here, we fill this gap by combining the online measurement of an LIF-based instrument (wideband integrated bioaerosol sensor, WIBS, 0.8-20 μm) with the measurements of typical biological matter and the compositions related to major nonbiological FAP from May to July in the megacity Beijing. We find that fungal spores and pollen are widely observed in all types of FAP using a WIBS. Bacteria are suggested to be associated with the fine mode FAP (excitation/emission: 280 nm/310-400 nm; 0.8-3 μm). The FL-B and -BC particles (emission in 420-650 nm) contributing the most to FAP are strongly associated with humic-like substances, dust, burning and combustion emissions, and secondary organic aerosols (SOA). This study provides a guide for interpreting individual FAP measured by LIF instruments and points to the applicability of online LIF instruments to characterize nonbiological compositions including SOA.
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Affiliation(s)
- Siyao Yue
- Institute of Surface-Earth System Science, School of Earth System Science, Tianjin University, Tianjin 300072, China
- State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
| | - Linjie Li
- State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
| | - Weiqi Xu
- State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
| | - Jian Zhao
- State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
| | - Hong Ren
- Institute of Surface-Earth System Science, School of Earth System Science, Tianjin University, Tianjin 300072, China
| | - Dongsheng Ji
- State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
| | - Ping Li
- State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
| | - Qiang Zhang
- Institute of Surface-Earth System Science, School of Earth System Science, Tianjin University, Tianjin 300072, China
| | - Lianfang Wei
- State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
| | - Qiaorong Xie
- Institute of Surface-Earth System Science, School of Earth System Science, Tianjin University, Tianjin 300072, China
- State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
| | - Xiaole Pan
- State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
| | - Zifa Wang
- State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
| | - Yele Sun
- State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
| | - Pingqing Fu
- Institute of Surface-Earth System Science, School of Earth System Science, Tianjin University, Tianjin 300072, China
- State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
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3
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Kawai M. [Environmental Monitoring in a Pharmaceutical Manufacturing Facility Using a Culture Independent Approach]. YAKUGAKU ZASSHI 2022; 142:33-37. [PMID: 34980749 DOI: 10.1248/yakushi.21-00161-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Strict microbial control is required in manufacturing facilities to ensure the quality of pharmaceuticals and foods. Environmental microbial monitoring plays a fundamental role in reducing the risk of microbial contamination. Appropriate microbial control requires an understanding of abundance and community structures of microbes in the target environment. However, most of these microbes are not culturable using conventional methods. In this study, we determined the number of microbial particles and assessed the environmental microbiome in a pharmaceutical manufacturing facility, using high-throughput sequencing of rRNA gene fragments. Our results provide fundamental data for the evaluation and control of microbes in the pharmaceutical and food industries.
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Affiliation(s)
- Mako Kawai
- Faculty of Pharmaceutical Sciences, Himeji Dokkyo University
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4
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Geng Z, Yang W, Wei S, Wang L, Pan J. Verification of Real-Time Microbial Monitoring Technology Based on the Principle of Laser-Induced Fluorescence Under USP <1223> Standard and Prospective Application in Our Hospital PIVAS Clean Room. Int J Pept Res Ther 2021. [DOI: 10.1007/s10989-021-10315-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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5
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Lu C, Zhang P, Chen S, Zhu J, Xu X, Huang H. Fluorescence spectrum photo-bleaching analysis for distinguishing microorganisms (bacteria and fungi) from other particles in air. OPTICS EXPRESS 2018; 26:28902-28917. [PMID: 30470060 DOI: 10.1364/oe.26.028902] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2018] [Accepted: 09/23/2018] [Indexed: 06/09/2023]
Abstract
A new device with a 405 nm blue laser diode is developed for collecting samples in air and detecting their spectra variation. The multi-sample particles which are pure microorganisms can be distinguished from interferents in the air by photo-bleaching phenomenon. Six types of microorganisms and twelve types of interferents from the air, which exhibit laser-induced fluorescence, are used to evaluate the performance of the analysis approach, and their fluorescence emission spectra are presented. The results show that when microorganisms are illuminated by the laser, the fluorescence spectra will change significantly within several minutes, including both the wavelength of the main peak and fluorescence intensity. Our work provides a potential approach to distinguish microorganisms from other particles by the changes.
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Saari S, Mensah-Attipoe J, Reponen T, Veijalainen AM, Salmela A, Pasanen P, Keskinen J. Effects of fungal species, cultivation time, growth substrate, and air exposure velocity on the fluorescence properties of airborne fungal spores. INDOOR AIR 2015; 25:653-661. [PMID: 25292152 DOI: 10.1111/ina.12166] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2014] [Accepted: 09/30/2014] [Indexed: 06/03/2023]
Abstract
UNLABELLED Real-time bioaerosol monitoring is possible with fluorescence based instruments. This study provides information on major factors that can affect the fluorescence properties of airborne fungal spores. Two fluorescence-based bioaerosol detectors, BioScout, and ultraviolet aerodynamic particle sizer (UVAPS), were used to study fluorescent particle fractions (FPFs) of released spores of three fungal species (Aspergillus versicolor, Cladosporium cladosporioides, and Penicillium brevicompactum). Two culture media (agar and gypsum board), three ages of the culture (one week, one month, and four months), and three aerosolization air velocities (5, 15, and 27 m/s) were tested. The results showed that the FPF values for spores released from gypsum were typically lower than for those released from agar indicating that poor nutrient substrate produces spores with lower amounts of fluorescent compounds. The results also showed higher FPF values with lower air velocities in aerosolization. This indicates that easily released fully developed spores have more fluorescent compounds compared to forcibly extracted non-matured spores. The FPFs typically were lower with older samples. The FPF results between the two instruments were similar, except with four-month-old samples. The results can be utilized in field measurements of fungal spores to estimate actual concentrations and compare different instruments with fluorescence-based devices as well as in instrument calibration and testing in laboratory conditions. PRACTICAL IMPLICATIONS Fluorescence-based instruments are the only choice for real-time detection of fungal spores at the moment. In general, all fluorescence-based bioaerosol instruments are tested against known bacterial and fungal spores in laboratory conditions. This study showed that fungal species, growth substrate, age of culture, and air current exposure rate have an effect on detection efficiency of fungal spores in the fluorescence-based instruments. Therefore, these factors should be considered in the instrument calibration process. The results are also important when interpreting results of fluorescence-based field measurements of fungal spores.
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Affiliation(s)
- S Saari
- Department of Physics, Tampere University of Technology, Tampere, Finland
| | - J Mensah-Attipoe
- Department of Environmental Science, University of Eastern Finland, Kuopio, Finland
| | - T Reponen
- Department of Environmental Science, University of Eastern Finland, Kuopio, Finland
- Department of Environmental Health, University of Cincinnati, Cincinnati, OH, USA
| | - A M Veijalainen
- Department of Environmental Science, University of Eastern Finland, Kuopio, Finland
| | - A Salmela
- Department of Environmental Science, University of Eastern Finland, Kuopio, Finland
| | - P Pasanen
- Department of Environmental Science, University of Eastern Finland, Kuopio, Finland
| | - J Keskinen
- Department of Physics, Tampere University of Technology, Tampere, Finland
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7
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Nozière B, Kalberer M, Claeys M, Allan J, D'Anna B, Decesari S, Finessi E, Glasius M, Grgić I, Hamilton JF, Hoffmann T, Iinuma Y, Jaoui M, Kahnt A, Kampf CJ, Kourtchev I, Maenhaut W, Marsden N, Saarikoski S, Schnelle-Kreis J, Surratt JD, Szidat S, Szmigielski R, Wisthaler A. The molecular identification of organic compounds in the atmosphere: state of the art and challenges. Chem Rev 2015; 115:3919-83. [PMID: 25647604 DOI: 10.1021/cr5003485] [Citation(s) in RCA: 203] [Impact Index Per Article: 22.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Barbara Nozière
- †Ircelyon/CNRS and Université Lyon 1, 69626 Villeurbanne Cedex, France
| | | | | | | | - Barbara D'Anna
- †Ircelyon/CNRS and Université Lyon 1, 69626 Villeurbanne Cedex, France
| | | | | | | | - Irena Grgić
- ○National Institute of Chemistry, 1000 Ljubljana, Slovenia
| | | | | | - Yoshiteru Iinuma
- ¶Leibniz-Institut für Troposphärenforschung, 04318 Leipzig, Germany
| | | | | | | | - Ivan Kourtchev
- ‡University of Cambridge, Cambridge CB2 1EW, United Kingdom
| | - Willy Maenhaut
- §University of Antwerp, 2000 Antwerp, Belgium.,□Ghent University, 9000 Gent, Belgium
| | | | | | | | - Jason D Surratt
- ▼University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
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9
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Lee HJJ, Laskin A, Laskin J, Nizkorodov SA. Excitation-emission spectra and fluorescence quantum yields for fresh and aged biogenic secondary organic aerosols. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2013; 47:5763-5770. [PMID: 23663151 DOI: 10.1021/es400644c] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Certain biogenic secondary organic aerosols (SOA) become absorbent and fluorescent when exposed to reduced nitrogen compounds such as ammonia, amines, and their salts. Fluorescent SOA may potentially be mistaken for biological particles by detection methods relying on fluorescence. This work quantifies the spectral distribution and effective quantum yields of fluorescence of water-soluble SOA generated from two monoterpenes, limonene and α-pinene, and two different oxidants, ozone (O3) and hydroxyl radical (OH). The SOA was generated in a smog chamber, collected on substrates, and aged by exposure to ∼100 ppb ammonia in air saturated with water vapor. Absorption and excitation-emission matrix (EEM) spectra of aqueous extracts of aged and control SOA samples were measured, and the effective absorption coefficients and fluorescence quantum yields (∼0.005 for 349 nm excitation) were determined from the data. The strongest fluorescence for the limonene-derived SOA was observed for λexcitation = 420 ± 50 nm and λemission = 475 ± 38 nm. The window of the strongest fluorescence shifted to λexcitation = 320 ± 25 nm and λemission = 425 ± 38 nm for the α-pinene-derived SOA. Both regions overlap with the EEM spectra of some of the fluorophores found in primary biological aerosols. Despite the low quantum yield, the aged SOA particles may have sufficient fluorescence intensities to interfere with the fluorescence detection of common bioaerosols.
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Affiliation(s)
- Hyun Ji Julie Lee
- Department of Chemistry, University of California, Irvine, California 92697, United States
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10
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Kiselev D, Bonacina L, Wolf JP. A flash-lamp based device for fluorescence detection and identification of individual pollen grains. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2013; 84:033302. [PMID: 23556810 DOI: 10.1063/1.4793792] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We present a novel optical aerosol particle detector based on Xe flash lamp excitation and spectrally resolved fluorescence acquisition. We demonstrate its performances on three natural pollens acquiring in real-time scattering intensity at two wavelengths, sub-microsecond time-resolved scattering traces of the particles' passage in the focus, and UV-excited fluorescence spectra. We show that the device gives access to a rather specific detection of the bioaerosol particles.
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Affiliation(s)
- Denis Kiselev
- GAP-Biophotonics, Université de Genève, 22 chemin de Pinchat, 1211 Genève 4, Switzerland.
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11
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Santarpia JL, Pan YL, Hill SC, Baker N, Cottrell B, McKee L, Ratnesar-Shumate S, Pinnick RG. Changes in fluorescence spectra of bioaerosols exposed to ozone in a laboratory reaction chamber to simulate atmospheric aging. OPTICS EXPRESS 2012; 20:29867-29881. [PMID: 23388813 DOI: 10.1364/oe.20.029867] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
A laboratory system for exposing aerosol particles to ozone and rapidly measuring the subsequent changes in their single-particle fluorescence is reported. The system consists of a rotating drum chamber and a single-particle fluorescence spectrometer (SPFS) utilizing excitation at 263 nm. Measurements made with this system show preliminary results on the ultra-violet laser-induced-fluorescence (UV-LIF) spectra of single aerosolized particles of Yersinia rohdei, and of MS2 (bacteriophage) exposed to ozone. When bioparticles are exposed in the chamber the fluorescence emission peak around 330 nm: i) decreases in intensity relative to that of the 400-550 nm band; and ii) shifts slightly toward shorter-wavelengths (consistent with further drying of the particles). In these experiments, changes were observed at exposures below the US Environmental Protection Agency (EPA) limits for ozone.
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Affiliation(s)
- Joshua L Santarpia
- Johns Hopkins University Applied Physics Laboratory, Laurel, Maryland 20723, USA
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12
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Jung JH, Lee JE, Bae GN. Real-time measurement of UV-inactivated Escherichia coli bacterial particles by electrospray-assisted UVAPS spectrometry. THE SCIENCE OF THE TOTAL ENVIRONMENT 2011; 409:3249-3255. [PMID: 21621246 DOI: 10.1016/j.scitotenv.2011.05.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2010] [Revised: 04/23/2011] [Accepted: 05/04/2011] [Indexed: 05/30/2023]
Abstract
The ultraviolet aerodynamic particle sizer (UVAPS) is a novel commercially available aerosol spectrometer for real-time continuous monitoring of viable bioaerosols, based on fluorescence from living microorganisms. In a previous study, we developed an electrospray-assisted UVAPS using biological electrospray techniques, which have the advantage of generating non-agglomerated single particles by the repulsive electrical forces. With this electrospraying of suspensions containing microorganisms, the analytical system can supply more accurate and quantitative information about living microorganisms than with conventional aerosolization. Using electrospray-assisted UVAPS, we investigated the characteristics of bacterial particles with various viabilities in real-time. Escherichia coli was used as the test microorganism, and its initial viability was controlled by the degree of exposure to UV irradiation. In the stable cone-jet domain, the particle size distributions of test bacterial particles remained almost uniform regardless of the degree of UV inactivation. However, the fluorescence spectra of the bacterial particles changed with the degree of UV inactivation. The fluorescence characteristics of UV-inactivated bacterial particles tended to show a similar decline with viability, determined by the sampling and culture method, although the percentage showing fluorescence was higher than that showing viability.
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Affiliation(s)
- Jae Hee Jung
- Environment Sensor System Research Center, Korea Institute of Science and Technology, Hawolgok-dong, Seongbuk-gu, Seoul 136-791, Republic of Korea
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13
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Surbek M, Esen C, Schweiger G, Ostendorf A. Pollen characterization and identification by elastically scattered light. JOURNAL OF BIOPHOTONICS 2011; 4:49-56. [PMID: 20209579 DOI: 10.1002/jbio.200900088] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2009] [Revised: 02/03/2010] [Accepted: 02/05/2010] [Indexed: 05/28/2023]
Abstract
The authors recorded the elastic light-scattering pattern of pollen over a large spatial angle range to investigate the potential light scattering for pollen identification. The scattering from elm, hazel, birch, chestnut, willow, sunflower, ragweed and pine was measured. The scattering patterns show distinct differences that can be used for the classification of pollen with simple algorithms.
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Affiliation(s)
- Mario Surbek
- Department of Mechanical Engineering, Ruhr-Universität Bochum, 44780 Bochum, Germany.
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14
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Esen C, Šurbek M, Baer S, Ostendorf A. Raman-Spektroskopie an einzelnen levitierten Partikeln. Raman Spectroscopy on Single Levitated Particles. CHEM-ING-TECH 2010. [DOI: 10.1002/cite.201000136] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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15
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Pan YL, Hill SC, Pinnick RG, Huang H, Bottiger JR, Chang RK. Fluorescence spectra of atmospheric aerosol particles measured using one or two excitation wavelengths: comparison of classification schemes employing different emission and scattering results. OPTICS EXPRESS 2010; 18:12436-57. [PMID: 20588371 DOI: 10.1364/oe.18.012436] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
An improved Dual-wavelength-excitation Particle Fluorescence Spectrometer (DPFS) has been reported. It measures two fluorescence spectra excited sequentially by lasers at 263 nm and 351 nm, from single atmospheric aerosol particles in the 1-10 mum diameter size range. Here we investigate the different levels of discrimination capability obtained when different numbers of excitation and fluorescence-emission wavelengths are used for analysis. We a) use the DPFS to measure fluorescence spectra of Bacillus subtilis and other aerosol particles, and a 25-hour sample of atmospheric aerosol at an urban site in Maryland, USA; b) analyze the data using six different algorithms that employ different levels of detail of the measured data; and c) show that when more of the data measured by the DPFS is used, the ability to discriminate among particle types is significantly increased.
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Affiliation(s)
- Yong-Le Pan
- US Army Research Laboratory, Adelphi, MD 20783, USA.
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16
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Knox KJ, Symes R, Reid JP. Fluorescence spectroscopy and signalling from optically-tweezed aerosol droplets. Chem Phys Lett 2010. [DOI: 10.1016/j.cplett.2010.01.046] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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17
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Jung JH, Lee JE, Hwang GB, Lee BU, Lee SB, Jurng JS, Bae GN. Electrospray-Assisted Ultraviolet Aerodynamic Particle Sizer Spectrometer for Real-time Characterization of Bacterial Particles. Anal Chem 2009; 82:664-71. [DOI: 10.1021/ac902189n] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jae Hee Jung
- Global Environment Center, Korea Institute of Science and Technology, Hawolgok-dong, Seongbuk-gu, Seoul 136-791, Republic of Korea, Public Health Microbiology Laboratory, Graduate School of Public Health, Seoul National University, Yeongeon-dong, Jongro-gu, Seoul 110-799, Republic of Korea, Aerosol and Bioengineering Laboratory, College of Engineering, Konkuk University, Hwayang-dong, Gwangjin-gu, Seoul 143-701, Republic of Korea
| | - Jung Eun Lee
- Global Environment Center, Korea Institute of Science and Technology, Hawolgok-dong, Seongbuk-gu, Seoul 136-791, Republic of Korea, Public Health Microbiology Laboratory, Graduate School of Public Health, Seoul National University, Yeongeon-dong, Jongro-gu, Seoul 110-799, Republic of Korea, Aerosol and Bioengineering Laboratory, College of Engineering, Konkuk University, Hwayang-dong, Gwangjin-gu, Seoul 143-701, Republic of Korea
| | - Gi Byoung Hwang
- Global Environment Center, Korea Institute of Science and Technology, Hawolgok-dong, Seongbuk-gu, Seoul 136-791, Republic of Korea, Public Health Microbiology Laboratory, Graduate School of Public Health, Seoul National University, Yeongeon-dong, Jongro-gu, Seoul 110-799, Republic of Korea, Aerosol and Bioengineering Laboratory, College of Engineering, Konkuk University, Hwayang-dong, Gwangjin-gu, Seoul 143-701, Republic of Korea
| | - Byung Uk Lee
- Global Environment Center, Korea Institute of Science and Technology, Hawolgok-dong, Seongbuk-gu, Seoul 136-791, Republic of Korea, Public Health Microbiology Laboratory, Graduate School of Public Health, Seoul National University, Yeongeon-dong, Jongro-gu, Seoul 110-799, Republic of Korea, Aerosol and Bioengineering Laboratory, College of Engineering, Konkuk University, Hwayang-dong, Gwangjin-gu, Seoul 143-701, Republic of Korea
| | - Seung Bok Lee
- Global Environment Center, Korea Institute of Science and Technology, Hawolgok-dong, Seongbuk-gu, Seoul 136-791, Republic of Korea, Public Health Microbiology Laboratory, Graduate School of Public Health, Seoul National University, Yeongeon-dong, Jongro-gu, Seoul 110-799, Republic of Korea, Aerosol and Bioengineering Laboratory, College of Engineering, Konkuk University, Hwayang-dong, Gwangjin-gu, Seoul 143-701, Republic of Korea
| | - Jong Soo Jurng
- Global Environment Center, Korea Institute of Science and Technology, Hawolgok-dong, Seongbuk-gu, Seoul 136-791, Republic of Korea, Public Health Microbiology Laboratory, Graduate School of Public Health, Seoul National University, Yeongeon-dong, Jongro-gu, Seoul 110-799, Republic of Korea, Aerosol and Bioengineering Laboratory, College of Engineering, Konkuk University, Hwayang-dong, Gwangjin-gu, Seoul 143-701, Republic of Korea
| | - Gwi Nam Bae
- Global Environment Center, Korea Institute of Science and Technology, Hawolgok-dong, Seongbuk-gu, Seoul 136-791, Republic of Korea, Public Health Microbiology Laboratory, Graduate School of Public Health, Seoul National University, Yeongeon-dong, Jongro-gu, Seoul 110-799, Republic of Korea, Aerosol and Bioengineering Laboratory, College of Engineering, Konkuk University, Hwayang-dong, Gwangjin-gu, Seoul 143-701, Republic of Korea
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18
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Surbek M, Fliess M, Esen C, Schweiger G. Klassifizierung von Pollen durch Analyse der elastischen Lichtstreuung mit Bildverarbeitungsmethoden. CHEM-ING-TECH 2009. [DOI: 10.1002/cite.200800156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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19
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Zhou X, Poenar DP, Liu KY, Tse MS, Heng CK, Tan SN, Zhang N. Algorithm and simulation for analysis of bio-images obtained by aperture diffraction based optical MEMS. OPTICS EXPRESS 2008; 16:11937-11953. [PMID: 18679467 DOI: 10.1364/oe.16.011937] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
This paper proposes a novel method to detect transparent living cells in a transparent microfluidic chamber by optical diffraction of an aperture or an aperture array. Through the analysis of the far-field diffraction pattern, one of the parameters of the cells, including the size, refractive index, or position, can be extracted by the analysis software developed in this paper. Calculations are carried out to discuss the key issues of this MEMS device, and our simulation is verified by diffraction patterns of transparent microparticles on fabricated apertures, recorded via a digital camera.
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Affiliation(s)
- Xiaodong Zhou
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), 3 Research Link, Singapore 117602.
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Zhou X, Poenar DP, Liu KY, Tse MS, Heng CK, Tan SN. Design of MEMS devices with optical apertures for the detection of transparent biological cells. Biomed Microdevices 2008; 10:639-52. [DOI: 10.1007/s10544-008-9175-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Sengupta A, Brar N, Davis EJ. Bioaerosol detection and characterization by surface-enhanced Raman spectroscopy. J Colloid Interface Sci 2007; 309:36-43. [PMID: 17362975 DOI: 10.1016/j.jcis.2007.02.015] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2006] [Revised: 12/28/2006] [Accepted: 02/01/2007] [Indexed: 11/29/2022]
Abstract
Instrumentation has been developed to detect and characterize airborne pollen and bacteria rapidly by injecting a bioaerosol into a nanocolloidal suspension of silver particles using a micropump. The biological particles were mixed with the silver colloid in order to deposit the metallic particles on the surface of the bioanalyte. The silver/bioanalyte suspension was pumped through a light scattering cuvette, and the enhanced Raman spectrum was recorded. Surface-enhanced Raman spectra are presented for tree pollen (cottonwood and redwood pollen) and a bacterium (Escherichia coli), and the E. coli spectra are compared with results obtained from the literature and with results obtained previously by mixing various concentrations of the bioanalyte with the silver colloid. Although the system has not been optimized to maximize the Raman spectra, it is shown spectra can be obtained rapidly. Some assignments of the chemical bonds associated with the spectra are based on previously published results for bacteria and pollen.
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Affiliation(s)
- Atanu Sengupta
- Department of Chemistry, University of Washington, Box 351700, Seattle, WA 98195-1700, USA
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Hill SC, Pinnick RG, Niles S, Pan YL, Holler S, Chang RK, Bottiger J, Chen BT, Orr CS, Feather G. Real-time measurement of fluorescence spectra from single airborne biological particles. ACTA ACUST UNITED AC 1999. [DOI: 10.1002/(sici)1520-6521(1999)3:4/5<221::aid-fact2>3.0.co;2-7] [Citation(s) in RCA: 141] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Gray PC, Shokair IR, Rosenthal SE, Tisone GC, Wagner JS, Rigdon LD, Siragusa GR, Heinen RJ. Distinguishability of biological material by use of ultraviolet multispectral fluorescence. APPLIED OPTICS 1998; 37:6037-6041. [PMID: 18286101 DOI: 10.1364/ao.37.006037] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Recent interest in the detection and analysis of biological samples by spectroscopic methods has led to questions concerning the degree of distinguishability and biological variability of the UV fluorescent spectra from such complex samples. We show that the degree of distinguishability of such spectra is readily determined numerically. As a practical example of this technique, we show its application to the analysis of UV fluorescence spectra taken of E. coli, S. aureus, and S. typhimurium. The use of this analysis to determine the degree of biological variability and also to verify that measurements are being made in a linear regime in which analytic methods such as multivariate analysis are valid is discussed.
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Tuminello PS, Arakawa ET, Khare BN, Wrobel JM, Querry MR, Milham ME. Optical properties of Bacillus subtilis spores from 0.2 to 2.5 num. APPLIED OPTICS 1997; 36:2818-2824. [PMID: 18253278 DOI: 10.1364/ao.36.002818] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
We have used spectral reflectance and transmittance measurements combined with Kramers-Krönig analyses to obtain the real (n) and imaginary (k) parts of the complex refractive index, N = n + ik, of Bacillus subtilis spores over a wavelength interval from 0.2 to 2.5 mum. Samples were in the form of thin solid films, pressed pellets, and suspensions in water and glycerol. The optical constants of spores suspended in water were found to differ from those of spores suspended in glycerol. In addition, spores previously exposed to water in earlier experiments and subsequently dried exhibited different optical constants from spores that had not been exposed to water.
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Chen G, Nachman P, Pinnick RG, Hill SC, Chang RK. Conditional-firing aerosol-fluorescence spectrum analyzer for individual airborne particles with pulsed 266-nm laser excitation. OPTICS LETTERS 1996; 21:1307-1309. [PMID: 19876334 DOI: 10.1364/ol.21.001307] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
We report the operation of an aerosol-fluorescence spectrum analyzer capable of selectively measuring the fluorescence spectra of single micrometer-sized aerosol particles as they flow through the instrument. As the particle first traverses a cw 488-nm probe laser beam, the total fluorescence and elastic scattering are measured with photomultipliers. When the photomultiplier output levels meet preset logic conditions, a UV laser (at 266 nm) is fired and the particle fluorescence spectrum is recorded. Fluorescence spectra of biological airborne particles are presented. The ability of the analyzer to capture the fluorescence spectrum of one type of particle while ignoring others, based on the particle characteristics, is also demonstrated.
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Nachman P, Chen G, Pinnick RG, Hill SC, Chang RK, Mayo MW, Fernandez GL. Conditional-sampling spectrograph detection system for fluorescence measurements of individual airborne biological particles. APPLIED OPTICS 1996; 35:1069-1076. [PMID: 21085216 DOI: 10.1364/ao.35.001069] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
We report the design and operation of a prototype conditional-sampling spectrograph detection system that can record the fluorescence spectra of individual, micrometer-sized aerosols as they traverse an intense 488-nm intracavity laser beam. The instrument's image-intensified CCD detector is gated by elastic scattering or by undispersed fluorescence from particles that enter the spectrograph's field of view. It records spectra only from particles with preselected scattering-fluorescence levels (a fiber-optic-photomultiplier subsystem provides the gating signal). This conditional-sampling procedure reduces data-handling rates and increases the signal-to-noise ratio by restricting the system's exposures to brief periods when aerosols traverse the beam. We demonstrate these advantages by reliably capturing spectra from individual fluorescent microspheres dispersed in an airstream. The conditional-sampling procedure also permits some discrimination among different types of particles, so that spectra may be recorded from the few interesting particles present in a cloud of background aerosol. We demonstrate such discrimination by measuring spectra from selected fluorescent microspheres in a mixture of two types of microspheres, and from bacterial spores in a mixture of spores and nonfluorescent kaolin particles.
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