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Bi R, Yang J, Huang C, Zhang X, Liao R, Ma H. Pulse Feature-Enhanced Classification of Microalgae and Cyanobacteria Using Polarized Light Scattering and Fluorescence Signals. Biosensors (Basel) 2024; 14:160. [PMID: 38667153 PMCID: PMC11048193 DOI: 10.3390/bios14040160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2024] [Revised: 03/25/2024] [Accepted: 03/26/2024] [Indexed: 04/28/2024]
Abstract
Harmful algal blooms (HABs) pose a global threat to the biodiversity and stability of local aquatic ecosystems. Rapid and accurate classification of microalgae and cyanobacteria in water is increasingly desired for monitoring complex water environments. In this paper, we propose a pulse feature-enhanced classification (PFEC) method as a potential solution. Equipped with a rapid measurement prototype that simultaneously detects polarized light scattering and fluorescence signals of individual particles, PFEC allows for the extraction of 38 pulse features to improve the classification accuracy of microalgae, cyanobacteria, and other suspended particulate matter (SPM) to 89.03%. Compared with microscopic observation, PFEC reveals three phyla proportions in aquaculture samples with an average error of less than 14%. In this paper, PFEC is found to be more accurate than the pulse-average classification method, which is interpreted as pulse features carrying more detailed information about particles. The high consistency of the dominant and common species between PFEC and microscopy in all field samples also demonstrates the flexibility and robustness of the former. Moreover, the high Pearson correlation coefficient accounting for 0.958 between the cyanobacterial proportion obtained by PFEC and the cyanobacterial density given by microscopy implies that PFEC serves as a promising early warning tool for cyanobacterial blooms. The results of this work suggest that PFEC holds great potential for the rapid and accurate classification of microalgae and cyanobacteria in aquatic environment monitoring.
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Affiliation(s)
- Ran Bi
- School of Physics and Optoelectronic Engineering, Yangtze University, Jingzhou 434023, China;
- Shenzhen Key Laboratory of Marine IntelliSense and Computation, Institute for Ocean Engineering, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China; (J.Y.); (C.H.)
| | - Jianxiong Yang
- Shenzhen Key Laboratory of Marine IntelliSense and Computation, Institute for Ocean Engineering, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China; (J.Y.); (C.H.)
- Division of Advanced Manufacturing, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
| | - Chengqi Huang
- Shenzhen Key Laboratory of Marine IntelliSense and Computation, Institute for Ocean Engineering, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China; (J.Y.); (C.H.)
| | - Xiaoyu Zhang
- Hainan Institute, Zhejiang University, Hangzhou 310058, China;
| | - Ran Liao
- Shenzhen Key Laboratory of Marine IntelliSense and Computation, Institute for Ocean Engineering, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China; (J.Y.); (C.H.)
- Guangdong Research Center of Polarization Imaging and Measurement Engineering Technology, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China;
| | - Hui Ma
- Guangdong Research Center of Polarization Imaging and Measurement Engineering Technology, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China;
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Han Y, Ding L, Wang Y, Zheng H, Fang L. Shape Discrimination of Individual Aerosol Particles Using Light Scattering. Sensors (Basel) 2023; 23:5464. [PMID: 37420631 DOI: 10.3390/s23125464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Revised: 05/31/2023] [Accepted: 06/06/2023] [Indexed: 07/09/2023]
Abstract
We established an experimental apparatus by combining polarized light scattering and angle-resolved light scattering measurement technology to rapidly identify the shape of an individual aerosol particle. The experimental data of scattered light of Oleic acid, rod-shaped Silicon dioxide, and other particles with typical shape characteristics were analyzed statistically. To better study the relationship between the shape of particles and the properties of scattered light, the partial least squares discriminant analysis (PLS-DA) method was used to analyze the scattered light of aerosol samples based on the size screening of particles, and the shape recognition and classification method of the individual aerosol particle was established based on the analysis of the spectral data after nonlinear processing and grouping by particle size with the area under the receiver operating characteristic curve (AUC) as reference. The experimental results show that the proposed classification method has a good discrimination ability for spherical, rod-shaped, and other non-spherical particles, which can provide more information for atmospheric aerosol measurement, and has application value for traceability and exposure hazard assessment of aerosol particles.
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Affiliation(s)
- Yan Han
- Anhui Institute of Optics and Fine Mechanics, Hefei Institutes of Physical Sciences, Chinese Academy of Sciences, Hefei 230031, China
- Graduate School of Science Island Branch, University of Science and Technology of China, Hefei 230026, China
| | - Lei Ding
- Anhui Institute of Optics and Fine Mechanics, Hefei Institutes of Physical Sciences, Chinese Academy of Sciences, Hefei 230031, China
| | - Yingping Wang
- Anhui Institute of Optics and Fine Mechanics, Hefei Institutes of Physical Sciences, Chinese Academy of Sciences, Hefei 230031, China
| | - Haiyang Zheng
- Anhui Institute of Optics and Fine Mechanics, Hefei Institutes of Physical Sciences, Chinese Academy of Sciences, Hefei 230031, China
| | - Li Fang
- Anhui Institute of Optics and Fine Mechanics, Hefei Institutes of Physical Sciences, Chinese Academy of Sciences, Hefei 230031, China
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Wang H, Liao R, Xiong Z, Wang Z, Li J, Zhou Q, Tao Y, Ma H. Simultaneously Acquiring Optical and Acoustic Properties of Individual Microalgae Cells Suspended in Water. Biosensors (Basel) 2022; 12:176. [PMID: 35323446 PMCID: PMC8945936 DOI: 10.3390/bios12030176] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Revised: 03/10/2022] [Accepted: 03/13/2022] [Indexed: 06/14/2023]
Abstract
Microalgae play a vital role in aquatic ecological research, but the fine classification of these tiny and various microalgae cells is still challenging for the community. In this paper, we propose a multimodality technique to simultaneously acquire the polarized light scattering, fluorescence and laser-induced acoustic wave signals originated from individual microalgae cells in water. Experiments of different species of Spirulina and different states of Microcystis have been conducted to test our experiment setup, and the results demonstrate that this method can well discriminate microalgae cells with pigment or microstructural differences. Moreover, with these modalities, the consumption of absorbed energy is evaluated quantitively, and a possible way to assess photosynthesis on a single-cell level is presented. This work is expected to be a powerful technique to probe the biophysical states of microalgae in the aquatic ecosystem.
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Affiliation(s)
- Hongjian Wang
- Shenzhen Key Laboratory of Marine IntelliSensing and Computation, Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China; (H.W.); (J.L.)
- Guangdong Research Center of Polarization Imaging and Measurement Engineering Technology, Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China;
| | - Ran Liao
- Shenzhen Key Laboratory of Marine IntelliSensing and Computation, Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China; (H.W.); (J.L.)
- Guangdong Research Center of Polarization Imaging and Measurement Engineering Technology, Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China;
| | - Zhihang Xiong
- Department of Photoelectric Technology, Foshan University, Guangzhou 528000, China;
| | - Zhao Wang
- Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China; (Z.W.); (Q.Z.); (Y.T.)
| | - Jiajin Li
- Shenzhen Key Laboratory of Marine IntelliSensing and Computation, Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China; (H.W.); (J.L.)
- Guangdong Research Center of Polarization Imaging and Measurement Engineering Technology, Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China;
| | - Qian Zhou
- Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China; (Z.W.); (Q.Z.); (Y.T.)
| | - Yi Tao
- Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China; (Z.W.); (Q.Z.); (Y.T.)
| | - Hui Ma
- Guangdong Research Center of Polarization Imaging and Measurement Engineering Technology, Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China;
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Xiong Z, Wang H, Li J, Liao R, Mai H, Guan C, Guo Z, Yang S, Chen Y, Liu B, Liu T, Li H, Ding W, Zeng Y, Ma H. Probing Individual Particles in Aquatic Suspensions by Simultaneously Measuring Polarized Light Scattering and Fluorescence. Biosensors (Basel) 2021; 11:416. [PMID: 34821632 PMCID: PMC8616012 DOI: 10.3390/bios11110416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 10/21/2021] [Accepted: 10/23/2021] [Indexed: 06/13/2023]
Abstract
Suspended particles play a significant role in aquatic systems. However, existing methods to probe suspended particles have several limitations. In this paper, we present a portable prototype to in situ probe individual particles in aquatic suspensions by simultaneously measuring polarized light scattering and fluorescence, aiming to obtain an effective classification of microplastics and microalgae. Results show that the obtained classification accuracy is significantly higher than that for either of these two methods. The setup also successfully measures submicron particles and discriminates two species of Synechococcus. Our study demonstrates the feasibility of simultaneously measuring polarized light scattering and fluorescence, and the promising capability of our method for further aquatic environmental monitoring.
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Affiliation(s)
- Zhihang Xiong
- Institute for Ocean Engineering, Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China; (Z.X.); (H.W.); (J.L.); (Z.G.); (Y.C.); (T.L.)
- Department of Photoelectric Technology, Foshan University, Foshan 528000, China; (H.M.); (C.G.); (S.Y.); (B.L.); (H.L.); (W.D.); (Y.Z.)
| | - Hongjian Wang
- Institute for Ocean Engineering, Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China; (Z.X.); (H.W.); (J.L.); (Z.G.); (Y.C.); (T.L.)
| | - Jiajin Li
- Institute for Ocean Engineering, Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China; (Z.X.); (H.W.); (J.L.); (Z.G.); (Y.C.); (T.L.)
- Department of Biomedical Engineering, Tsinghua University, Beijing 100084, China
| | - Ran Liao
- Institute for Ocean Engineering, Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China; (Z.X.); (H.W.); (J.L.); (Z.G.); (Y.C.); (T.L.)
- Guangdong Research Center of Polarization Imaging and Measurement Engineering Technology, Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China;
| | - Haoji Mai
- Department of Photoelectric Technology, Foshan University, Foshan 528000, China; (H.M.); (C.G.); (S.Y.); (B.L.); (H.L.); (W.D.); (Y.Z.)
| | - Caizhong Guan
- Department of Photoelectric Technology, Foshan University, Foshan 528000, China; (H.M.); (C.G.); (S.Y.); (B.L.); (H.L.); (W.D.); (Y.Z.)
| | - Zhiming Guo
- Institute for Ocean Engineering, Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China; (Z.X.); (H.W.); (J.L.); (Z.G.); (Y.C.); (T.L.)
| | - Shangpan Yang
- Department of Photoelectric Technology, Foshan University, Foshan 528000, China; (H.M.); (C.G.); (S.Y.); (B.L.); (H.L.); (W.D.); (Y.Z.)
| | - Yan Chen
- Institute for Ocean Engineering, Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China; (Z.X.); (H.W.); (J.L.); (Z.G.); (Y.C.); (T.L.)
| | - Biwang Liu
- Department of Photoelectric Technology, Foshan University, Foshan 528000, China; (H.M.); (C.G.); (S.Y.); (B.L.); (H.L.); (W.D.); (Y.Z.)
| | - Tong Liu
- Institute for Ocean Engineering, Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China; (Z.X.); (H.W.); (J.L.); (Z.G.); (Y.C.); (T.L.)
| | - Hongyi Li
- Department of Photoelectric Technology, Foshan University, Foshan 528000, China; (H.M.); (C.G.); (S.Y.); (B.L.); (H.L.); (W.D.); (Y.Z.)
| | - Wenzheng Ding
- Department of Photoelectric Technology, Foshan University, Foshan 528000, China; (H.M.); (C.G.); (S.Y.); (B.L.); (H.L.); (W.D.); (Y.Z.)
| | - Yaguang Zeng
- Department of Photoelectric Technology, Foshan University, Foshan 528000, China; (H.M.); (C.G.); (S.Y.); (B.L.); (H.L.); (W.D.); (Y.Z.)
| | - Hui Ma
- Guangdong Research Center of Polarization Imaging and Measurement Engineering Technology, Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China;
- Department of Physics, Tsinghua University, Beijing 100084, China
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Li J, Liao R, Tao Y, Zhuo Z, Liu Z, Deng H, Ma H. Probing the Cyanobacterial Microcystis Gas Vesicles after Static Pressure Treatment: A Potential In Situ Rapid Method. Sensors (Basel) 2020; 20:s20154170. [PMID: 32727053 PMCID: PMC7435630 DOI: 10.3390/s20154170] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Revised: 07/24/2020] [Accepted: 07/24/2020] [Indexed: 11/21/2022]
Abstract
The vertical migration trend of cyanobacterial cells with gas vesicles in water ecosystems can reflect the changes in the natural environment, such as temperature, nutrients, light conditions, etc. The static pressure treatment is one of the most important approaches to study the properties of the cyanobacterial cell and its gas vesicles. In this paper, a polarized light scattering method is used to probe the collapse and regeneration of the cyanobacterial gas vesicles exposed to different static pressures. During the course, both the axenic and wild type strain of cyanobacterial Microcystis were first treated with different static pressures and then recovered on the normal light conditions. Combining the observation of transmission electron microscopy and floating-sinking photos, the results showed that the collapse and regeneration of the cyanobacterial gas vesicles exposed to different static pressures can be characterized by the polarization parameters. The turbidity as a traditional indicator of gas vesicles but subjected to the concentration of the sample was also measured and found to be correlated with the polarization parameters. More analysis indicated that the polarization parameters are more sensitive and characteristic. The polarized light scattering method can be used to probe the cyanobacterial gas vesicles exposed to different static pressures, which has the potential to provide an in situ rapid and damage-free monitoring tool for observing the vertical migration of cyanobacterial cells and forecasting cyanobacterial blooms.
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Affiliation(s)
- Jiajin Li
- Department of Biomedical Engineering, Tsinghua University, Beijing 100084, China; (J.L.); (Z.L.); (H.D.)
| | - Ran Liao
- Division of Ocean Science and Technology, Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
- Correspondence: ; Tel.: +86-755-869-75-301
| | - Yi Tao
- Guangdong Provincial Engineering Research Center for Urban Water Recycling and Environmental Safety, Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China;
| | - Zepeng Zhuo
- Department of Physics, Tsinghua University, Beijing 100084, China; (Z.Z.); (H.M.)
| | - Zhidi Liu
- Department of Biomedical Engineering, Tsinghua University, Beijing 100084, China; (J.L.); (Z.L.); (H.D.)
| | - Hanbo Deng
- Department of Biomedical Engineering, Tsinghua University, Beijing 100084, China; (J.L.); (Z.L.); (H.D.)
| | - Hui Ma
- Department of Physics, Tsinghua University, Beijing 100084, China; (Z.Z.); (H.M.)
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Abstract
Understanding the cellular basis of human health and disease requires the spatial resolution of microscopy and the molecular-level details provided by spectroscopy. This review highlights imaging methods at the intersection of microscopy and spectroscopy with applications in cell biology. Imaging methods are divided into three broad categories: fluorescence microscopy, label-free approaches, and imaging tools that can be applied to multiple imaging modalities. Just as these imaging methods allow researchers to address new biological questions, progress in biological sciences will drive the development of new imaging methods. We highlight four topics in cell biology that illustrate the need for new imaging tools: nanoparticle-cell interactions, intracellular redox chemistry, neuroscience, and the increasing use of spheroids and organoids. Overall, our goal is to provide a brief overview of individual imaging methods and highlight recent advances in the use of microscopy for cell biology.
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Affiliation(s)
- Joshua D Morris
- School of Science and Technology, Georgia Gwinnett College, Lawrenceville, Georgia 30043, USA
| | - Christine K Payne
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina 27708, USA;
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