1
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Feng L, Wang Z, Jia D, Zou X, Rao M, Huang Z, Kuang C, Ye J, Chen C, Huang C, Zhang M, Cheng J. Functional metabolism pathways of significantly regulated genes in Nannochloropsis oceanica with various nitrogen/phosphorus nutrients for CO 2 fixation. Sci Total Environ 2023; 883:163318. [PMID: 37030370 DOI: 10.1016/j.scitotenv.2023.163318] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Revised: 03/16/2023] [Accepted: 04/02/2023] [Indexed: 06/03/2023]
Abstract
To determine the optimal CO2 concentration for microalgal biomass cultivated with industrial flue gas and improve carbon fixation capacity and biomass production. Functional metabolism pathways of significantly regulated genes in Nannochloropsis oceanica (N. oceanica) with various nitrogen/phosphorus (N/P) nutrients for CO2 fixation were comprehensively clarified. At 100 % N/P nutrients, the optimum CO2 concentration was 70 % and the maximum biomass production of microalgae was 1.57 g/L. The optimum CO2 concentration was 50 % for N or P deficiency and 30 % for both N and P deficiency. The optimal combination of CO2 concentration and N/P nutrients caused significant up regulation of proteins related to photosynthesis and cellular respiration in the microalgae, enhancing photosynthetic electron transfer efficiency and carbon metabolism. Microalgal cells with P deficiency and optimal CO2 concentration expressed many phosphate transporter proteins to enhance P metabolism and N metabolism to maintain a high carbon fixation capacity. However, inappropriate combination of N/P nutrients and CO2 concentrations caused more errors in DNA replication and protein synthesis, generating more lysosomes and phagosomes. This inhibited carbon fixation and biomass production in the microalgae with increased cell apoptosis.
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Affiliation(s)
- Lingchong Feng
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, Zhejiang, China
| | - Zhenyi Wang
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, Zhejiang, China
| | - Dongwei Jia
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, Zhejiang, China
| | - Xiangbo Zou
- Guangdong Energy Group Science and Technology Research Institute Co. Ltd., Guangzhou 510630, China
| | - Mumin Rao
- Guangdong Energy Group Science and Technology Research Institute Co. Ltd., Guangzhou 510630, China
| | - Zhimin Huang
- Guangdong Yudean Zhanjiang Biomass Power Co., Ltd., Zhanjiang 524300, China
| | - Cao Kuang
- Guangdong Energy Group Science and Technology Research Institute Co. Ltd., Guangzhou 510630, China
| | - Ji Ye
- Guangdong Energy Group Science and Technology Research Institute Co. Ltd., Guangzhou 510630, China
| | - Chuangting Chen
- Guangdong Energy Group Science and Technology Research Institute Co. Ltd., Guangzhou 510630, China
| | - Cong Huang
- Guangdong Yudean Zhanjiang Biomass Power Co., Ltd., Zhanjiang 524300, China
| | - Maoqiang Zhang
- Guangdong Yudean Zhanjiang Biomass Power Co., Ltd., Zhanjiang 524300, China
| | - Jun Cheng
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, Zhejiang, China; Key Laboratory of Low-grade Energy Utilization Technologies and Systems of Ministry of Education, Chongqing University, Chongqing 400044, China.
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2
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Feng L, Jia D, Wang Z, Guo J, Zou X, Rao M, Kuang C, Ye J, Chen C, Cheng J. FIB-SEM combined with proteomics and modification omics clarified mechanisms of lipids synthesis in organelles of Chlorella pyrenoidosa cells with high CO 2 concentration. Sci Total Environ 2023:164516. [PMID: 37263437 DOI: 10.1016/j.scitotenv.2023.164516] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Revised: 05/21/2023] [Accepted: 05/26/2023] [Indexed: 06/03/2023]
Abstract
In order to explain reasons why flue-gas CO2 (normally containing high CO2) enhanced carbon fixation and lipids synthesis with increased photochemical electron production in microalgae cells. Focused ion beam scanning electron microscopy (FIB-SEM) was combined with proteomics and phosphorylation modification mics to clarify mechanisms of lipids synthesis at protein and organelle levels in Chlorella pyrenoidosa cells cultivated with high CO2 concentration (15 % v/v). The volumes of chloroplast and endoplasmic reticulum in subcellular organelles increased by 47 % and 306 %, respectively, compared with the control, which improved conversion efficiency of starch grains to lipids (lipid content increased by 57 %). Proteomics and modifications omics revealed that protein translation and ribosome structure and biogenesis-related enzymes were significantly modified by phosphorylation, which regulated protein biological functions. Glycolysis, pentose phosphate pathway and other carbohydrate metabolic pathways were markedly enriched and promoted the expression of lipid synthase, which was consistent with enhanced carbon fixation in photosynthesis, expansion of subcellular organelles and improved lipids synthesis.
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Affiliation(s)
- Lingchong Feng
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou, 310027, Zhejiang, China
| | - Dongwei Jia
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou, 310027, Zhejiang, China
| | - Zhenyi Wang
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou, 310027, Zhejiang, China
| | - Jiansheng Guo
- Center of Cryo-Electron Microscopy, Zhejiang University, Hangzhou 310027, China
| | - Xiangbo Zou
- Guangdong Energy Group Science and Technology Research Institute Co. Ltd., Guangzhou 510630, China
| | - Mumin Rao
- Guangdong Energy Group Science and Technology Research Institute Co. Ltd., Guangzhou 510630, China
| | - Cao Kuang
- Guangdong Energy Group Science and Technology Research Institute Co. Ltd., Guangzhou 510630, China
| | - Ji Ye
- Guangdong Energy Group Science and Technology Research Institute Co. Ltd., Guangzhou 510630, China
| | - Chuangting Chen
- Guangdong Energy Group Science and Technology Research Institute Co. Ltd., Guangzhou 510630, China
| | - Jun Cheng
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou, 310027, Zhejiang, China; Key Laboratory of Low-grade Energy Utilization Technologies and Systems of Ministry of Education, Chongqing University, Chongqing 400044, China.
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3
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Feng L, Guo W, Guo J, Zhang X, Zou X, Rao M, Ye J, Kuang C, Chen G, Chen C, Qin S, Yang W, Cheng J. FIB-SEM analysis on three-dimensional structures of growing organelles in wild Chlorella pyrenoidosa cells. Protoplasma 2023; 260:885-897. [PMID: 36416933 DOI: 10.1007/s00709-022-01821-7] [Citation(s) in RCA: 1] [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] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Accepted: 11/07/2022] [Indexed: 06/16/2023]
Abstract
To clarify dynamic changes of organelle microstructures in Chlorella pyrenoidosa cells during photosynthetic growth with CO2 fixation, three-dimensional (3D) organelle microstructures in three growth periods of meristem, elongation, and maturity were quantitatively determined and comprehensively reconstructed with focused ion beam scanning electron microscopy (FIB-SEM). The single round-pancake mitochondria in each cell split into a dumbbell and then into a circular ring, while the barycenter distance of mitochondria to chloroplast and nucleus was reduced to 45.5% and 88.3% to strengthen energy transfer, respectively. The single pyrenoid consisting of a large part and another small part in each chloroplast gradually developed to a mature state in which the two parts were nearly equal in size. The nucleolus progressively became larger with euchromatin replication. The number of starch grains gradually increased, but the mean grain volume remained nearly unchanged.
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Affiliation(s)
- Lingchong Feng
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou, 310027, Zhejiang, China
| | - Wangbiao Guo
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou, 310027, Zhejiang, China
| | - Jiansheng Guo
- Center of Cryo-Electron Microscopy, Zhejiang University, Hangzhou, 310027, China
| | - Xing Zhang
- Center of Cryo-Electron Microscopy, Zhejiang University, Hangzhou, 310027, China
| | - Xiangbo Zou
- Guangdong Energy Group Science and Technology Research Institute Co. Ltd, Guangzhou, 510630, China
| | - Mumin Rao
- Guangdong Energy Group Science and Technology Research Institute Co. Ltd, Guangzhou, 510630, China
| | - Ji Ye
- Guangdong Energy Group Science and Technology Research Institute Co. Ltd, Guangzhou, 510630, China
| | - Cao Kuang
- Guangdong Energy Group Science and Technology Research Institute Co. Ltd, Guangzhou, 510630, China
| | - Gongda Chen
- Guangdong Energy Group Science and Technology Research Institute Co. Ltd, Guangzhou, 510630, China
| | - Chuangting Chen
- Guangdong Energy Group Science and Technology Research Institute Co. Ltd, Guangzhou, 510630, China
| | - Shiwei Qin
- Guangdong Energy Group Science and Technology Research Institute Co. Ltd, Guangzhou, 510630, China
| | - Weijuan Yang
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou, 310027, Zhejiang, China
| | - Jun Cheng
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou, 310027, Zhejiang, China.
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Xin K, Guo R, Zou X, Rao M, Huang Z, Kuang C, Ye J, Chen C, Huang C, Zhang M, Yang W, Cheng J. CO 2 gradient domestication improved high-concentration CO 2 tolerance and photoautotrophic growth of Euglena gracilis. Sci Total Environ 2023; 868:161629. [PMID: 36657669 DOI: 10.1016/j.scitotenv.2023.161629] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Revised: 01/08/2023] [Accepted: 01/11/2023] [Indexed: 06/17/2023]
Abstract
In order to improve CO2 biofixation efficiency of microalgae cultivated with coal-chemical flue gas, CO2 gradient domestication was employed to improve high-concentration CO2 tolerance and photoautotrophic growth of acid-tolerant Euglena gracilis. The dried biomass yield of photoautotrophic growth of E.gracilis increased from 1.09 g/L (wild-type strain) by 21 % to 1.32 g/L with CO2 gradient domestication to 15 % CO2. The RuBisCO activity and biomass production of E.gracilis strain domesticated to 99 % CO2 were 2.63 and 3.4 times higher, respectively, than those of wild-type strain. The chlorophyll a and b contents were 2.52 and 1.79 times higher, respectively, than those of wild-type strain. Superoxide dismutase and catalase activities of 99 % CO2-domesticated strain increased to 1.24 and 6 times, which reduced peroxide damage under high carbon stress and resulted in lower apoptotic and necrotic rates of domesticated strain. Thus, this work provides valuable guidance for CO2 fixation and adaptive evolution of E. gracilis in industrial flue gas.
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Affiliation(s)
- Kai Xin
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, Zhejiang, China
| | - Ruhan Guo
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, Zhejiang, China
| | - Xiangbo Zou
- Guangdong Energy Group Science and Technology Research Institute Co. Ltd., Guangzhou 510630, China
| | - Mumin Rao
- Guangdong Energy Group Science and Technology Research Institute Co. Ltd., Guangzhou 510630, China
| | - Zhimin Huang
- Guangdong Yudean Zhanjiang Biomass Power Co. Ltd., Zhanjiang 524300, China
| | - Cao Kuang
- Guangdong Energy Group Science and Technology Research Institute Co. Ltd., Guangzhou 510630, China
| | - Ji Ye
- Guangdong Energy Group Science and Technology Research Institute Co. Ltd., Guangzhou 510630, China
| | - Chuangting Chen
- Guangdong Energy Group Science and Technology Research Institute Co. Ltd., Guangzhou 510630, China
| | - Cong Huang
- Guangdong Yudean Zhanjiang Biomass Power Co. Ltd., Zhanjiang 524300, China
| | - Maoqiang Zhang
- Guangdong Yudean Zhanjiang Biomass Power Co. Ltd., Zhanjiang 524300, China
| | - Weijuan Yang
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, Zhejiang, China
| | - Jun Cheng
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, Zhejiang, China; Key Laboratory of Low-grade Energy Utilization Technologies and Systems of Ministry of Education, Chongqing University, Chongqing 400044, China.
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5
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Kumar S, Jia D, Kubar AA, Zou X, Huang Z, Rao M, Kuang C, Ye J, Chen C, Chu F, Cheng J. Butterfly Baffle-Enhanced Solution Mixing and Mass Transfer for Improved Microalgal Growth in Double-Column Photobioreactor. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c02994] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Santosh Kumar
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China
| | - Dongwei Jia
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China
| | - Ameer Ali Kubar
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China
| | - Xiangbo Zou
- Guangdong Energy Group Science and Technology Research Institute Co., Ltd., Guangzhou 510630, China
| | - Zhimin Huang
- Guangdong Yudean Zhanjiang Biomass Power Co., Ltd., Zhanjiang 524300, China
| | - Mumin Rao
- Guangdong Energy Group Science and Technology Research Institute Co., Ltd., Guangzhou 510630, China
| | - Cao Kuang
- Guangdong Energy Group Science and Technology Research Institute Co., Ltd., Guangzhou 510630, China
| | - Ji Ye
- Guangdong Energy Group Science and Technology Research Institute Co., Ltd., Guangzhou 510630, China
| | - Chuangting Chen
- Guangdong Energy Group Science and Technology Research Institute Co., Ltd., Guangzhou 510630, China
| | - Feifei Chu
- College of Standardization, China Jiliang University, Hangzhou 310018, China
| | - Jun Cheng
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China
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6
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Kuang C, Wang S, Luo M, Zhao J. Reactivity study and kinetic evaluation of CuO-based oxygen carriers modified by three different ores in chemical looping with oxygen uncoupling (CLOU) process. Chin J Chem Eng 2021. [DOI: 10.1016/j.cjche.2020.12.027] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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7
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Zhu D, Liu W, Zhang Z, Zheng C, Chen Y, Li C, Kuang C, Fan J, Xu Y, Liu X, Hussain A. Enhancement of fluorescence emission difference microscopy using conjugated vortex phase modulation. J Microsc 2018; 272:151-159. [PMID: 30338534 DOI: 10.1111/jmi.12756] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Revised: 08/09/2018] [Accepted: 08/18/2018] [Indexed: 11/25/2022]
Abstract
In this paper, we propose and demonstrate an improved fluorescence emission difference microscopy (FED) method, exploiting programmable phase modulation for image enhancement. The main novelty of the proposed approach lies in the matched size and intensity of two excitation spots. The proposed method improves the FED performance on image quality via artefact elimination. We demonstrate the feasibility of this method through theoretical studies and experimental tests. The experimental results of nanobeads and cells validate the practical performance of this method, which can enable reliable observations at superresolution in biomedical studies. LAY DESCRIPTION: In this paper, we propose a method to improve the imaging quality of regular fluorescence emission difference (FED) microscopy. In regular FED imaging, a solid and a doughnut excitation beam are successively used to acquire two images which are then subtracted with each other to improve the resolution of confocal microscopy. The doughnut beam can be generated by modulating the excitation beam with a vortex phase mask. Note that both of the excitation beam and the vortex phase mask must have the same handed direction in regular FED microscopy. However, some negative values may be produced and some information may be lost due to the subtraction process in regular FED imaging, which is mainly caused by the mismatched size and intensity of these two excitation spots. To address this issue, we propose conjugated FED (cFED) microscopy which additionally uses a conjugated vortex phase mask to modulate the solid beam to extend its focal spot size to be matched with the doughnut spot, which means the handed direction of the solid beam and the vortex phase mask is different. Besides, in order not to damage the resolution, the doughnut beam needs to be saturated to some degree. The experiment results show that, at the same resolution level, the negative values and the information loss in cFED image are all less than that of regular FED image.
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Affiliation(s)
- D Zhu
- State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou, China
| | - W Liu
- State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou, China
| | - Z Zhang
- State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou, China
| | - C Zheng
- State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou, China
| | - Y Chen
- State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou, China.,Key Laboratory of Instrumentation Science & Dynamic Measurement of Ministry of Education, North University of China, Taiyuan, China
| | - C Li
- State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou, China
| | - C Kuang
- State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou, China.,Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, China
| | - J Fan
- Key Laboratory of Biomedical Engineering of Ministry of Education, Department of Biomedical Engineering, Hangzhou, China
| | - Y Xu
- Key Laboratory of Biomedical Engineering of Ministry of Education, Department of Biomedical Engineering, Hangzhou, China
| | - X Liu
- State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou, China.,Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, China
| | - A Hussain
- State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou, China.,Quantum Optics Lab, Department of Physics, COMSATS University, Islamabad, Pakistan
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8
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Li C, Liu S, Wang W, Liu W, Kuang C, Liu X. Recent research on stimulated emission depletion microscopy for reducing photobleaching. J Microsc 2018; 271:4-16. [PMID: 29600565 DOI: 10.1111/jmi.12698] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Revised: 02/23/2018] [Accepted: 02/28/2018] [Indexed: 12/11/2022]
Abstract
Stimulated emission depletion (STED) microscopy is a useful tool in investigation for super-resolution realm. By silencing the peripheral fluorophores of the excited spot, leaving only the very centre zone vigorous for fluorescence, the effective point spread function (PSF) could be immensely squeezed and subcellular structures, such as organelles, become discernable. Nevertheless, because of the low cross-section of stimulated emission and the short fluorescence lifetime, the depletion power density has to be extremely higher than the excitation power density and molecules are exposed in high risk of photobleaching. The existence of photobleaching greatly limits the research of STED in achieving higher resolution and more delicate imaging quality, as well as long-term and dynamic observation. Since the first experimental implementation of STED microscopy, researchers have lift out variety of methods and techniques to alleviate the problem. This paper would present some researches via conventional methods which have been explored and utilised relatively thoroughly, such as fast scanning, time-gating, two-photon excitation (TPE), triplet relaxation (T-Rex) and background suppression. Alternatively, several up-to-date techniques, especially adaptive illumination, would also be unveiled for discussion in this paper. The contrast and discussion of these modalities would play an important role in ameliorating the research of STED microscopy.
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Affiliation(s)
- C Li
- State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou, China
| | - S Liu
- State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou, China
| | - W Wang
- State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou, China
| | - W Liu
- State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou, China
| | - C Kuang
- State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou, China.,Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, China
| | - X Liu
- State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou, China.,Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, China
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9
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Xiu P, Liu Q, Zhou X, Xu Y, Kuang C, Liu X. Analogous on-axis interference topographic phase microscopy (AOITPM). J Microsc 2018; 270:235-243. [PMID: 29323732 DOI: 10.1111/jmi.12677] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2017] [Revised: 11/12/2017] [Accepted: 12/17/2017] [Indexed: 11/28/2022]
Abstract
The refractive index (RI) of a sample as an endogenous contrast agent plays an important role in transparent live cell imaging. In tomographic phase microscopy (TPM), 3D quantitative RI maps can be reconstructed based on the measured projections of the RI in multiple directions. The resolution of the RI maps not only depends on the numerical aperture of the employed objective lens, but also is determined by the accuracy of the quantitative phase of the sample measured at multiple scanning illumination angles. This paper reports an analogous on-axis interference TPM, where the interference angle between the sample and reference beams is kept constant for projections in multiple directions to improve the accuracy of the phase maps and the resolution of RI tomograms. The system has been validated with both silica beads and red blood cells. Compared with conventional TPM, the proposed system acquires quantitative RI maps with higher resolution (420 nm @λ = 633 nm) and signal-to-noise ratio that can be beneficial for live cell imaging in biomedical applications.
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Affiliation(s)
- P Xiu
- State Key Laboratory of Modern Optical Instrumentations, College of Optical Science and Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Q Liu
- State Key Laboratory of Modern Optical Instrumentations, College of Optical Science and Engineering, Zhejiang University, Hangzhou, 310027, China
| | - X Zhou
- Key Laboratory of Biomedical Engineering of Ministry of Education, Department of Biomedical Engineering, Zhejiang Provincial Key Laboratory of Cardio-Cerebral Vascular Detection Technology and Medicinal Effectiveness Appraisal, Zhejiang University, Hangzhou, 310027, China
| | - Y Xu
- Key Laboratory of Biomedical Engineering of Ministry of Education, Department of Biomedical Engineering, Zhejiang Provincial Key Laboratory of Cardio-Cerebral Vascular Detection Technology and Medicinal Effectiveness Appraisal, Zhejiang University, Hangzhou, 310027, China
| | - C Kuang
- State Key Laboratory of Modern Optical Instrumentations, College of Optical Science and Engineering, Zhejiang University, Hangzhou, 310027, China
| | - X Liu
- State Key Laboratory of Modern Optical Instrumentations, College of Optical Science and Engineering, Zhejiang University, Hangzhou, 310027, China
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10
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Cai J, Wang S, Kuang C. A Modified Random Pore Model for Carbonation Reaction of CaO-based Limestone with CO 2 in Different Calcination-carbonation Cycles. ACTA ACUST UNITED AC 2017. [DOI: 10.1016/j.egypro.2017.03.561] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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11
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Li Y, Liu S, Liu D, Sun S, Kuang C, Ding Z, Liu X. Image scanning fluorescence emission difference microscopy based on a detector array. J Microsc 2017; 266:288-297. [PMID: 28199004 DOI: 10.1111/jmi.12538] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2016] [Revised: 01/13/2017] [Accepted: 01/25/2017] [Indexed: 12/25/2022]
Abstract
We propose a novel imaging method that enables the enhancement of three-dimensional resolution of confocal microscopy significantly and achieve experimentally a new fluorescence emission difference method for the first time, based on the parallel detection with a detector array. Following the principles of photon reassignment in image scanning microscopy, images captured by the detector array were arranged. And by selecting appropriate reassign patterns, the imaging result with enhanced resolution can be achieved with the method of fluorescence emission difference. Two specific methods are proposed in this paper, showing that the difference between an image scanning microscopy image and a confocal image will achieve an improvement of transverse resolution by approximately 43% compared with that in confocal microscopy, and the axial resolution can also be enhanced by at least 22% experimentally and 35% theoretically. Moreover, the methods presented in this paper can improve the lateral resolution by around 10% than fluorescence emission difference and 15% than Airyscan. The mechanism of our methods is verified by numerical simulations and experimental results, and it has significant potential in biomedical applications.
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Affiliation(s)
- Y Li
- State Key Laboratory of Modern Optical Instrumentation, Department of Optical Engineering, Zhejiang University, Hangzhou, China
| | - S Liu
- State Key Laboratory of Modern Optical Instrumentation, Department of Optical Engineering, Zhejiang University, Hangzhou, China
| | - D Liu
- State Key Laboratory of Modern Optical Instrumentation, Department of Optical Engineering, Zhejiang University, Hangzhou, China
| | - S Sun
- State Key Laboratory of Modern Optical Instrumentation, Department of Optical Engineering, Zhejiang University, Hangzhou, China
| | - C Kuang
- State Key Laboratory of Modern Optical Instrumentation, Department of Optical Engineering, Zhejiang University, Hangzhou, China.,Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, China
| | - Z Ding
- State Key Laboratory of Modern Optical Instrumentation, Department of Optical Engineering, Zhejiang University, Hangzhou, China
| | - X Liu
- State Key Laboratory of Modern Optical Instrumentation, Department of Optical Engineering, Zhejiang University, Hangzhou, China.,Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, China
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12
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13
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Kuang C, McMurry PH, McCormick AV, Eisele FL. Dependence of nucleation rates on sulfuric acid vapor concentration in diverse atmospheric locations. ACTA ACUST UNITED AC 2008. [DOI: 10.1029/2007jd009253] [Citation(s) in RCA: 345] [Impact Index Per Article: 21.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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