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Park J, Yoon EY, Moon SJ, Hyung JH, Lee H. Comparison of Lipid Content in Nine Dinoflagellate Species Using Flow Cytometry. Microorganisms 2024; 13:44. [PMID: 39858812 PMCID: PMC11768077 DOI: 10.3390/microorganisms13010044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2024] [Revised: 12/25/2024] [Accepted: 12/27/2024] [Indexed: 01/27/2025] Open
Abstract
The lipid content of nine dinoflagellates was analyzed using flow cytometry to compare lipid levels. Additionally, the correlation between lipid content, cell size, and carbon content in dinoflagellates was evaluated using BODIPY 505/515 staining. The flow cytometry side scatter (SSC) effectively represented relative cell size, showing a linear relationship with the equivalent spherical diameter (ESD). Larger cells exhibited higher relative lipid content; however, lipid accumulation was influenced by nutritional modes and habitats, with mixorophic and benthic species displaying higher lipid content than heterotrophic species. A comparison of fluorescent dyes revealed that Nile Red overestimated lipid content, suggesting overlap with chlorophyll autofluorescence. Flow cytometry analysis with BODIPY 505/515 demonstrated a linear correlation with the sulfo-phospho-vanillin (SPV) method, enabling determination of actual lipid content using FL1 fluorescence and the slope value. As the carbon content increased, the lipid content initially increased rapidly but plateaued at higher carbon levels, indicating saturation. These findings suggest that relative fluorescence via flow cytometry provides an effective means to estimate the lipid content and carbon content as a function of cell size.
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Affiliation(s)
- Jaeyeon Park
- Advanced Institute of Convergence Technology, Suwon 16229, Republic of Korea; (S.J.M.); (J.-H.H.); (H.L.)
| | - Eun Young Yoon
- Advanced Institute of Convergence Technology, Suwon 16229, Republic of Korea; (S.J.M.); (J.-H.H.); (H.L.)
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2
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Sun H, Xie X, Ding J. Electrogenic performance and carbon sequestration potential of biophotovoltaics. THE SCIENCE OF NATURE - NATURWISSENSCHAFTEN 2024; 111:50. [PMID: 39331084 DOI: 10.1007/s00114-024-01936-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2024] [Revised: 09/10/2024] [Accepted: 09/12/2024] [Indexed: 09/28/2024]
Abstract
Biophotovoltaics (BPV) is a clean and sustainable solar energy generation technology that operates by utilizing photosynthetic autotrophic microorganisms to capture light energy and generate electricity. However, a major challenge faced by BPV systems is the relatively low electron transfer efficiency from the photosystem to the extracellular electrode, which limits its electrical output. Additionally, the transfer mechanisms of photosynthetic microorganism metabolites in the entire system are still not fully clear. In response to this, this article briefly introduces the basic BPV principles, reviews its development history, and summarizes measures to optimize its electrogenic efficiency. Furthermore, recent studies have found that constructing photosynthetic-electrogenic microbial consortia can achieve high power density and stability in BPV systems. Therefore, the article discusses the potential application of constructing photosynthetic-electrogenic microbial aggregates in BPV systems. Since photosynthetic-electrogenic microbial communities can also exist in natural ecosystems, their potential contribution to the carbon cycle is worth further attention.
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Affiliation(s)
- Haitang Sun
- School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, 215009, China
| | - Xuan Xie
- School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, 215009, China
| | - Jing Ding
- School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, 215009, China.
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3
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Farjallah A, Fillion M, Guéguen C. Metabolic responses of Euglena gracilis under photoheterotrophic and heterotrophic conditions. Protist 2024; 175:126035. [PMID: 38688055 DOI: 10.1016/j.protis.2024.126035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2023] [Revised: 03/19/2024] [Accepted: 04/15/2024] [Indexed: 05/02/2024]
Abstract
The protist Euglena gracilis has various trophic modes including heterotrophy and photoheterotrophy. To investigate how cultivation mode influences metabolic regulation, the chemical composition of cellular metabolites of Euglena gracilis grown under heterotrophic and photoheterotrophic conditions was monitored from the early exponential phase to the mid-stationary phase using two different techniques, i.e, nuclear magnetic resonance (NMR) spectroscopy and high-resolution mass spectrometry (HRMS). The combined metabolomics approach allowed an in-depth understanding of the mechanism of photoheterotrophic and heterotrophic growth for biomolecule production. Heterotrophic conditions promoted the production of polar amino and oxygenated compounds such as proteins and polyphenol compounds, especially at the end of the exponential phase while photoheterotrophic cells enhanced the production of organoheterocyclic compounds, carbohydrates, and alkaloids.
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Affiliation(s)
- Asma Farjallah
- Département de Chimie, Université de Sherbrooke, Sherbrooke, Québec, Canada
| | - Matthieu Fillion
- Département de Chimie, Université de Sherbrooke, Sherbrooke, Québec, Canada
| | - Céline Guéguen
- Département de Chimie, Université de Sherbrooke, Sherbrooke, Québec, Canada.
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Li Y, Wu X, Liu Y, Taidi B. Immobilized microalgae: principles, processes and its applications in wastewater treatment. World J Microbiol Biotechnol 2024; 40:150. [PMID: 38548998 DOI: 10.1007/s11274-024-03930-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2023] [Accepted: 02/16/2024] [Indexed: 04/02/2024]
Abstract
Microalgae have emerged as potential candidates for biomass production and pollutant removal. However, expensive biomass harvesting, insufficient biomass productivity, and low energy intensity limit the large-scale production of microalgae. To break through these bottlenecks, a novel technology of immobilized microalgae culture coupled with wastewater treatment has received increasing attention in recent years. In this review, the characteristics of two immobilized microalgae culture technologies are first presented and then their mechanisms are discussed in terms of biofilm formation theories, including thermodynamic theory, Derjaguin-Landau-Verwei-Overbeek theory (DLVO) and its extended theory (xDLVO), as well as ionic cross-linking mechanisms in the process of microalgae encapsulated in alginate. The main factors (algal strains, carriers, and culture conditions) affecting the growth of microalgae are also discussed. It is also summarized that immobilized microalgae show considerable potential for nitrogen and phosphorus removal, heavy metal removal, pesticide and antibiotic removal in wastewater treatment. The role of bacteria in the cultivation of microalgae by immobilization techniques and their application in wastewater treatment are clarified. This is economically feasible and technically superior. The problems and challenges faced by immobilized microalgae are finally presented.
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Affiliation(s)
- Yanpeng Li
- School of Water and Environment, Chang`an University, Yanta Road #126, Yanta District, Xi`an, 710054, People's Republic of China.
- Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, Chang`an University, Xi`an, 710054, People's Republic of China.
| | - Xuexue Wu
- School of Water and Environment, Chang`an University, Yanta Road #126, Yanta District, Xi`an, 710054, People's Republic of China
| | - Yi Liu
- School of Water and Environment, Chang`an University, Yanta Road #126, Yanta District, Xi`an, 710054, People's Republic of China
| | - Behnam Taidi
- LGPM, CentraleSupélec, Université Paris Saclay, 3 rue Joliot-Curie, 91190, Gif-sur-Yvette, France
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Policastro G, Ebrahimi S, Weissbrodt DG, Fabbricino M, van Loosdrecht MCM. Selecting for a high lipid accumulating microalgae culture by dual growth limitation in a continuous bioreactor. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 912:169213. [PMID: 38097066 DOI: 10.1016/j.scitotenv.2023.169213] [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: 10/17/2023] [Revised: 12/06/2023] [Accepted: 12/06/2023] [Indexed: 12/25/2023]
Abstract
A dual-growth-limited continuous operated bioreactor (chemostat) was used to enhance lipid accumulation in an enrichment culture of microalgae. The light intensity and nitrogen concentration where both limiting factors resulting in high lipid accumulation in the mixed culture. Both conditions of light and nitrogen excess and deficiency were tested. Strategies to selectively enrich for a phototrophic lipid-storing community, based on the use of different nitrogen sources (ammonium vs. nitrate) and vitamin B supplementation in the growth medium, were evaluated. The dual limitation of both nitrogen and light enhanced the accumulation of storage compounds. Ammoniacal nitrogen was the preferred nitrogen source. Vitamin B supplementation led to a doubling of the lipid productivity. The availability of vitamins played a key role in selecting an efficient lipid-storing community, primarily consisting of Trebouxiophyceae (with an 82 % relative abundance among eukaryotic microorganisms). The obtained lipid volumetric productivity (387 mg L-1 d-1) was among the highest reported in literature for microalgae bioreactors. Lipid production by the microalgae enrichment surpassed the efficiencies reported for continuous microalgae pure cultures, highlighting the benefits of mixed-culture photo-biotechnologies for fuels and food ingredients in the circular economy.
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Affiliation(s)
- Grazia Policastro
- Department of Engineering and Computer Science, Telematic University Pegaso, Naples, Italy; Department of Civil, Architectural and Environmental Engineering, University of Naples Federico II, Naples, Italy.
| | - Sirous Ebrahimi
- Biotechnology Research Center, Faculty of Chemical Engineering, Sahand University of Technology, Tabriz, Iran; Department of Biotechnology, Delft University of Technology, Delft, the Netherlands
| | - David G Weissbrodt
- Department of Biotechnology, Delft University of Technology, Delft, the Netherlands; Department of Biotechnology and Natural Sciences, Norwegian University of Science and Technology, Trondheim, Norway
| | - Massimiliano Fabbricino
- Department of Civil, Architectural and Environmental Engineering, University of Naples Federico II, Naples, Italy
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Hong Y, Yang L, You X, Zhang H, Xin X, Zhang Y, Zhou X. Effects of light quality on microalgae cultivation: bibliometric analysis, mini-review, and regulation approaches. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023:10.1007/s11356-023-31192-2. [PMID: 38015404 DOI: 10.1007/s11356-023-31192-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Accepted: 11/19/2023] [Indexed: 11/29/2023]
Abstract
The ever-increasing concern for energy shortages and greenhouse effect has triggered the development of sustainable green technologies. Microalgae have received more attention due to the characteristics of biofuel production and CO2 fixation. From the perspective of autotrophic growth, the optimization of light quality has the potential to promote biomass production and bio-component accumulation in microalgae at low cost. In this study, bibliometric analysis was used to describe the basic features, identify the hotspots, and predict future trends of the research related to the light quality on microalgae cultivation. In addition, a mini-review referring to regulation methods of light quality was provided to optimize the framework of research. Results demonstrated that China has the greatest interest in this area. The destination of most research was to obtain biofuels and high-value-added products. Both blue and red lights were identified as the crucial spectrums for microalgae cultivation. However, sunlight is the most affordable light resource, which could not be fully utilized by microalgae through the photosynthetic process. Hence, some regulation approaches (e.g., dyes, plasmonic scattering, and carbon-based quantum dots) are proposed to increase the proportion of beneficial spectrum for enhancement of photosynthetic efficiency. In summary, this review introduces state-of-the-art research and provides theoretical guidance for light quality optimization in microalgae cultivation to obtain more benefits.
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Affiliation(s)
- Yongyuan Hong
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China
| | - Libin Yang
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China.
| | - Xiaogang You
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China
| | - Haigeng Zhang
- Fishery Machinery and Instrument Research Institute, Chinese Academy of Fishery Sciences, Shanghai, 200092, China
| | - Xiaying Xin
- Department of Civil Engineering, Queen's University, Kingston, ON, K7L 3N6, Canada
| | - Yalei Zhang
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China
| | - Xuefei Zhou
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China
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Wang Y, Yang S, Liu J, Wang J, Xiao M, Liang Q, Ren X, Wang Y, Mou H, Sun H. Realization process of microalgal biorefinery: The optional approach toward carbon net-zero emission. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 901:165546. [PMID: 37454852 DOI: 10.1016/j.scitotenv.2023.165546] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Revised: 07/12/2023] [Accepted: 07/12/2023] [Indexed: 07/18/2023]
Abstract
Increasing carbon dioxide (CO2) emission has already become a dire threat to the human race and Earth's ecology. Microalgae are recommended to be engineered as CO2 fixers in biorefinery, which play crucial roles in responding climate change and accelerating the transition to a sustainable future. This review sorted through each segment of microalgal biorefinery to explore the potential for its practical implementation and commercialization, offering valuable insights into research trends and identifies challenges that needed to be addressed in the development process. Firstly, the known mechanisms of microalgal photosynthetic CO2 fixation and the approaches for strain improvement were summarized. The significance of process regulation for strengthening fixation efficiency and augmenting competitiveness was emphasized, with a specific focus on CO2 and light optimization strategies. Thereafter, the massive potential of microalgal refineries for various bioresource production was discussed in detail, and the integration with contaminant reclamation was mentioned for economic and ecological benefits. Subsequently, economic and environmental impacts of microalgal biorefinery were evaluated via life cycle assessment (LCA) and techno-economic analysis (TEA) to lit up commercial feasibility. Finally, the current obstacles and future perspectives were discussed objectively to offer an impartial reference for future researchers and investors.
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Affiliation(s)
- Yuxin Wang
- College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China
| | - Shufang Yang
- Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China
| | - Jin Liu
- Laboratory for Algae Biotechnology and Innovation, College of Engineering, Peking University, Beijing 100871, China
| | - Jia Wang
- College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China
| | - Mengshi Xiao
- College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China
| | - Qingping Liang
- College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China
| | - Xinmiao Ren
- College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China
| | - Ying Wang
- Marine Science research Institute of Shandong Province, Qingdao 266003, China.
| | - Haijin Mou
- College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China.
| | - Han Sun
- Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China.
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Singh Chauhan D, Sahoo L, Mohanty K. Acclimation-driven microalgal cultivation improved temperature and light stress tolerance, CO 2 sequestration and metabolite regulation for bioenergy production. BIORESOURCE TECHNOLOGY 2023; 385:129386. [PMID: 37364652 DOI: 10.1016/j.biortech.2023.129386] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Revised: 06/19/2023] [Accepted: 06/21/2023] [Indexed: 06/28/2023]
Abstract
This study investigates temperature and light impact on the ability of Micractinium pusillum microalgae to mitigate CO2 and produce bioenergy in semi-continuous mode. Microalgae were exposed to temperatures (15, 25, and 35 °C) and light intensities (50, 350, and 650 μmol m-2 s-1), including two temperature cycles, 25 °C had the maximum growth rate, with no significant difference at 35 °C and light intensities of 350 and 650 μmol m-2 s-1. 15 °C temperature and 50 μmol m-2 s-1 light intensity reduced growth. Increased light intensity accelerated growth, CO2 utilization with carbon and bioenergy accumulation. Microalgae demonstrate rapid primary metabolic adjustment and acclimation reactions in response to changes in light and temperature conditions. Temperature correlated positively with carbon and nitrogen fixation, CO2 fixation, and carbon accumulation in the biomass, whereas there was no correlation found between light. In the temperature regime experiment, higher light intensity boosted nutrient and CO2 utilization, carbon buildup, and biomass bioenergy.
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Affiliation(s)
- Deepesh Singh Chauhan
- School of Energy Science and Engineering, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Lingaraj Sahoo
- School of Energy Science and Engineering, Indian Institute of Technology Guwahati, Guwahati 781039, India; Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Kaustubha Mohanty
- School of Energy Science and Engineering, Indian Institute of Technology Guwahati, Guwahati 781039, India; Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati 781039, India.
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9
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Zhang J, Huang B, Tang T. Effect of co-culture with Halomonas mongoliensis on Dunaliella salina growth and phenol degradation. Front Bioeng Biotechnol 2022; 10:1072868. [PMID: 36479431 PMCID: PMC9720160 DOI: 10.3389/fbioe.2022.1072868] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Accepted: 11/09/2022] [Indexed: 08/02/2024] Open
Abstract
The discharge of industrial phenol wastewater has caused great harm to the environment. This study aims to construct microalgae and bacteria co-culture system to remove phenol from simulated high-salt phenol wastewater and accumulate microalgae biomass. The degradation of phenol by marine microalgae Dunaliella salina (D. salina) and phenol-degrading bacteria Halomonas mongoliensis (H. mongoliensis) was investigated preliminarily, and then the effects of co-culture H. mongoliensis and D. salina on the degradation of phenol and the growth of D. salina were studied. The effects of D. salina/H. mongoliensis inoculation ratio, light intensity, temperature and pH on the performance of the co-culture system were systematically evaluated and optimized. The optimal conditions for phenol degradation were as follows: a D. salina/H. mongoliensis inoculation ratio of 2:1, a light intensity of 120 μmol m-2 s-1, a temperature of 25°C and a pH around 7.5. Under optimal conditions, this co-culture system could completely degrade 400 mg L-1 of phenol within 5 days. Correspondingly, the phenol degradation rate of D. salina monoculture was only 30.3% ± 1.3% within 5 days. Meanwhile, the maximum biomass concentration of D. salina in coculture was 1.7 times compared to the monoculture. This study suggested that this coculture system had great potential for the bioremediation of phenol contaminants and accumulate microalgae biomass.
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Affiliation(s)
| | | | - Tao Tang
- CAS Key Lab of Low-Carbon Conversion Science & Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, China
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Xing Y, Guo L, Wang Y, Jin C, Gao M, Zhao Y, She Z. Roles of illumination on distribution of phosphorus in Chlorella vulgaris under mixotrophic cultivation. CHEMOSPHERE 2022; 303:134904. [PMID: 35561784 DOI: 10.1016/j.chemosphere.2022.134904] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Revised: 04/21/2022] [Accepted: 05/06/2022] [Indexed: 06/15/2023]
Abstract
Phosphorus (P) is a non-substitutable resource and global reserves of phosphate rock are limited. In this study, phosphorus recovery by Chlorella vulgaris, and the effects of different light intensities (2000 Lux, 5000 Lux, 8000 Lux, 12,000 Lux) on the phosphorus distribution in the soluble microbial product (SMP), extracellular polymeric substance (EPS) and intracellular polymeric substance (IPS) were analyzed. The results showed that the 5000 Lux was the optimum light intensity for P uptake and transformation by Chlorella vulgaris under mixotrophic cultivation. At the light intensity of 5000 Lux, the P uptake rate was 100% after 32 days of cultivation, and the concentration of intracellular organic phosphorus (OP) was 5.77 mg P/L. Moreover, EPS was the main P pool when inorganic phosphorus (IP) was depleted in bulk solution. Phosphorus recovery by microalgae is an important solution to treat P-containing wastewater.
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Affiliation(s)
- Yifan Xing
- College of Environmental Science and Engineering, Ocean University of China, Qingdao, 266100, China
| | - Liang Guo
- College of Environmental Science and Engineering, Ocean University of China, Qingdao, 266100, China; Key Laboratory of Marine Environmental and Ecology, Ministry of Education, Ocean University of China, Qingdao, 266100, China; Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering, Qingdao, 266100, China.
| | - Yu Wang
- College of Environmental Science and Engineering, Ocean University of China, Qingdao, 266100, China
| | - Chunji Jin
- College of Environmental Science and Engineering, Ocean University of China, Qingdao, 266100, China
| | - Mengchun Gao
- College of Environmental Science and Engineering, Ocean University of China, Qingdao, 266100, China
| | - Yangguo Zhao
- College of Environmental Science and Engineering, Ocean University of China, Qingdao, 266100, China
| | - Zonglian She
- College of Environmental Science and Engineering, Ocean University of China, Qingdao, 266100, China
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Mehariya S, Plöhn M, Leon-Vaz A, Patel A, Funk C. Improving the content of high value compounds in Nordic Desmodesmus microalgal strains. BIORESOURCE TECHNOLOGY 2022; 359:127445. [PMID: 35718245 DOI: 10.1016/j.biortech.2022.127445] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Revised: 06/06/2022] [Accepted: 06/07/2022] [Indexed: 06/15/2023]
Abstract
Nordic Desmodesmus microalgal strains (2-6) and (RUC-2) were exposed to abiotic stress (light and salt) to enhance lipids and carotenoids. The biomass output of both strains increased by more than 50% during light stress of 800 μmol m-2 s-1 compared to control light. The biomass of Desmodesmus sp. (2-6) contained most lipids (15% of dry weight) and total carotenoids (16.6 mg g-1) when grown at moderate light stress (400 μmol m-2 s-1), which further could be enhanced up to 2.5-fold by salinity stress. Desmodesmus sp. (RUC-2) exhibited maximal lipid (26.5%) and carotenoid (43.8 mg L-1) content at light intensities of 400 and 100 μmol m-2 s-1, respectively. Salinity stress stimulated lipid accumulation by 39%. Nordic Desmodesmus strains therefore are not only able to tolerate stress conditions, but their biomass considerably improves under stress. These strains have high potential to be used in algal bio-factories on low-cost medium like Baltic seawater.
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Affiliation(s)
| | - Martin Plöhn
- Department of Chemistry, Umeå University, Umeå, Sweden
| | - Antonio Leon-Vaz
- Department of Chemistry, Umeå University, Umeå, Sweden; Laboratory of Biochemistry, University of Huelva, Huelva, Spain
| | - Alok Patel
- Biochemical Process Engineering, Division of Chemical Engineering, Luleå University of Technology, Luleå, Sweden
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de Souza AH, Mendonça HDOP, de Paula ACCFF, Augusti R, Fante CA, Melo JOF, Carlos LDA. Influence of Harvest Time on the Chemical Profile of Pereskia aculeate Mill. Using Paper Spray Mass Spectrometry. Molecules 2022; 27:molecules27134276. [PMID: 35807521 PMCID: PMC9268433 DOI: 10.3390/molecules27134276] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Revised: 05/18/2022] [Accepted: 05/19/2022] [Indexed: 11/16/2022] Open
Abstract
This study evaluated the physicochemical characteristics and the production of bioactive compounds of Pereskia aculeata Mill. at different harvest times. Here, we performed a qualitative evaluation of the chemical profile by paper spray mass spectrometry (PSMS), the phenolic acid and flavonoid profile by high-performance liquid chromatography (HPLC), antioxidant activity, total carotenoids, total phenolic compounds, total flavonoids, total anthocyanins, color characteristics, total soluble solids (TSS), total solids (TS), pH, and total titratable acidity (TTA). The chemical profile was not affected, with the exception of 4,5-dimethyl-2,6-octadiene and azelaic acid, which was only identified in the leaves harvested during the winter. The content of four phenolic acids and three flavonoids were analyzed; out of these, no significant amounts of ellagic acid and quercetin were detected. There was no difference in production of bioactive compounds between seasons, reflecting the antioxidant activity, which also did not differ. Brightness, chroma, and leaf pH were the only physicochemical characteristics that did not vary between seasons.
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Affiliation(s)
- Antonio Henrique de Souza
- Agricultural Sciences Department, Federal University of São João del-Rei, Sete Lagoas 35701-970, MG, Brazil; (A.H.d.S.); (H.d.O.P.M.); (L.d.A.C.)
| | - Henrique de Oliveira Prata Mendonça
- Agricultural Sciences Department, Federal University of São João del-Rei, Sete Lagoas 35701-970, MG, Brazil; (A.H.d.S.); (H.d.O.P.M.); (L.d.A.C.)
| | | | - Rodinei Augusti
- Chemistry Department, Federal University of Minas Gerais, Belo Horizonte 31270-901, MG, Brazil;
| | - Camila Argenta Fante
- Food Department, Federal University of Minas Gerais, Belo Horizonte 31270-901, MG, Brazil;
| | - Júlio Onésio Ferreira Melo
- Agricultural Sciences Department, Federal University of São João del-Rei, Sete Lagoas 35701-970, MG, Brazil; (A.H.d.S.); (H.d.O.P.M.); (L.d.A.C.)
- Correspondence:
| | - Lanamar de Almeida Carlos
- Agricultural Sciences Department, Federal University of São João del-Rei, Sete Lagoas 35701-970, MG, Brazil; (A.H.d.S.); (H.d.O.P.M.); (L.d.A.C.)
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Udayan A, Pandey AK, Sirohi R, Sreekumar N, Sang BI, Sim SJ, Kim SH, Pandey A. Production of microalgae with high lipid content and their potential as sources of nutraceuticals. PHYTOCHEMISTRY REVIEWS : PROCEEDINGS OF THE PHYTOCHEMICAL SOCIETY OF EUROPE 2022; 22:1-28. [PMID: 35095355 PMCID: PMC8783767 DOI: 10.1007/s11101-021-09784-y] [Citation(s) in RCA: 41] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Accepted: 10/07/2021] [Indexed: 05/05/2023]
Abstract
In the current global scenario, the world is under a serious dilemma due to the increasing human population, industrialization, and urbanization. The ever-increasing need for fuels and increasing nutritional problems have made a serious concern on the demand for nutrients and renewable and eco-friendly fuel sources. Currently, the use of fossil fuels is creating ecological and economic problems. Microalgae have been considered as a promising candidate for high-value metabolites and alternative renewable energy sources. Microalgae offer several advantages such as rapid growth rate, efficient land utilization, carbon dioxide sequestration, ability to cultivate in wastewater, and most importantly, they do not participate in the food crop versus energy crop dilemma or debate. An efficient microalgal biorefinery system for the production of lipids and subsequent byproduct for nutraceutical applications could well satisfy the need. But, the current microalgal cultivation systems for the production of lipids and nutraceuticals do not offer techno-economic feasibility together with energy and environmental sustainability. This review article has its main focus on the production of lipids and nutraceuticals from microalgae, covering the current strategies used for lipid production and the major high-value metabolites from microalgae and their nutraceutical importance. This review also provides insights on the future strategies for enhanced microalgal lipid production and subsequent utilization of microalgal biomass. GRAPHICAL ABSTRACT
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Affiliation(s)
- Aswathy Udayan
- Department of Chemical Engineering, Hanyang University, Seoul, South Korea
| | - Ashutosh Kumar Pandey
- School of Civil and Environmental Engineering, Yonsei University, Seoul, South Korea
| | - Ranjna Sirohi
- Department of Chemical and Biological Engineering, Korea University, Seoul, South Korea
- Centre for Energy and Environmental Sustainability, Lucknow, Uttar Pradesh 226 029 India
| | - Nidhin Sreekumar
- Accubits Invent, Accubits Technologies Inc., Thiruvananthapuram, Kerala 695 004 India
| | - Byoung-In Sang
- Department of Chemical Engineering, Hanyang University, Seoul, South Korea
| | - Sung Jun Sim
- Department of Chemical and Biological Engineering, Korea University, Seoul, South Korea
| | - Sang Hyoun Kim
- School of Civil and Environmental Engineering, Yonsei University, Seoul, South Korea
| | - Ashok Pandey
- Centre for Energy and Environmental Sustainability, Lucknow, Uttar Pradesh 226 029 India
- Centre for Innovation and Translational Research, CSIR-Indian Institute of Toxicology Research, Lucknow, Uttar Pradesh 226 001 India
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Asgharnejad H, Sarrafzadeh MH, Abhar-Shegofteh O, Khorshidi Nazloo E, Oh HM. Biomass quantification and 3-D topography reconstruction of microalgal biofilms using digital image processing. ALGAL RES 2021. [DOI: 10.1016/j.algal.2021.102243] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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15
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Park SB, Yun JH, Ryu AJ, Yun J, Kim JW, Lee S, Choi S, Cho DH, Choi DY, Lee YJ, Kim HS. Development of a novel nannochloropsis strain with enhanced violaxanthin yield for large-scale production. Microb Cell Fact 2021; 20:43. [PMID: 33588824 PMCID: PMC7885382 DOI: 10.1186/s12934-021-01535-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2020] [Accepted: 02/02/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Nannochloropsis is a marine microalga that has been extensively studied. The major carotenoid produced by this group of microalgae is violaxanthin, which exhibits anti-inflammatory, anti-photoaging, and antiproliferative activities. Therefore, it has a wide range of potential applications. However, large-scale production of this pigment has not been much studied, thereby limiting its industrial application. RESULTS To develop a novel strain producing high amount of violaxanthin, various Nannochloropsis species were isolated from seawater samples and their violaxanthin production potential were compared. Of the strains tested, N. oceanica WS-1 exhibited the highest violaxanthin productivity; to further enhance the violaxanthin yield of WS-1, we performed gamma-ray-mediated random mutagenesis followed by colorimetric screening. As a result, Mutant M1 was selected because of its significant higher violaxanthin content and biomass productivity than WS-1 (5.21 ± 0.33 mg g- 1 and 0.2101 g L- 1 d- 1, respectively). Subsequently, we employed a 10 L-scale bioreactor to confirm the large-scale production potential of M1, and the results indicated a 43.54 % increase in violaxanthin production compared with WS-1. In addition, comparative transcriptomic analysis performed under normal light condition identified possible mechanisms associated with remediating photo-inhibitory damage and other key responses in M1, which seemed to at least partially explain enhanced violaxanthin content and delayed growth. CONCLUSIONS Nannochloropsis oceanica mutant (M1) with enhanced violaxanthin content was developed and its physiological characteristics were investigated. In addition, enhanced production of violaxanthin was demonstrated in the large-scale cultivation. Key transcriptomic responses that are seemingly associated with different physiological responses of M1 were elucidated under normal light condition, the details of which would guide ongoing efforts to further maximize the industrial potential of violaxanthin producing strains.
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Affiliation(s)
- Su-Bin Park
- Cell Factory Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 34141, Daejeon, Republic of Korea.,Major of Environmental Biotechnology, KRIBB School of Biotechnology, Korea University of Science and Technology (UST), 34113, Daejeon, Republic of Korea
| | - Jin-Ho Yun
- Cell Factory Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 34141, Daejeon, Republic of Korea
| | - Ae Jin Ryu
- Cell Factory Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 34141, Daejeon, Republic of Korea
| | - Joohyun Yun
- Cell Factory Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 34141, Daejeon, Republic of Korea
| | - Ji Won Kim
- Cell Factory Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 34141, Daejeon, Republic of Korea.,Major of Environmental Biotechnology, KRIBB School of Biotechnology, Korea University of Science and Technology (UST), 34113, Daejeon, Republic of Korea
| | - Sujin Lee
- Cell Factory Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 34141, Daejeon, Republic of Korea.,Major of Environmental Biotechnology, KRIBB School of Biotechnology, Korea University of Science and Technology (UST), 34113, Daejeon, Republic of Korea
| | - Saehae Choi
- Cell Factory Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 34141, Daejeon, Republic of Korea.,Osong Medical Innovation Foundation, 28160, Chungbuk, Republic of Korea
| | - Dae-Hyun Cho
- Cell Factory Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 34141, Daejeon, Republic of Korea
| | - Dong-Yun Choi
- Cell Factory Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 34141, Daejeon, Republic of Korea
| | - Yong Jae Lee
- Cell Factory Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 34141, Daejeon, Republic of Korea. .,Major of Environmental Biotechnology, KRIBB School of Biotechnology, Korea University of Science and Technology (UST), 34113, Daejeon, Republic of Korea.
| | - Hee-Sik Kim
- Cell Factory Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 34141, Daejeon, Republic of Korea. .,Major of Environmental Biotechnology, KRIBB School of Biotechnology, Korea University of Science and Technology (UST), 34113, Daejeon, Republic of Korea.
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Lee SA, Lee N, Oh HM, Ahn CY. Stepwise treatment of undiluted raw piggery wastewater, using three microalgal species adapted to high ammonia. CHEMOSPHERE 2021; 263:127934. [PMID: 32828055 DOI: 10.1016/j.chemosphere.2020.127934] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2020] [Revised: 07/21/2020] [Accepted: 08/05/2020] [Indexed: 06/11/2023]
Abstract
A high ammonia concentration and chemical oxygen demand (COD) in piggery wastewater force it to be diluted before conventional microalgal treatment to reduce ammonia toxicity. Incomplete treatment of ammonia and COD in piggery wastewater may cause eutrophication, resulting in algal blooms. This study tried to treat raw piggery wastewater without dilution, using three strains of microalgae (Chlorella sorokiniana, Coelastrella sp. and Acutodesmus nygaardii) that outcompeted other algae under heterotrophic, mixotrophic, and autotrophic conditions, respectively, through adaptive evolution at high ammonia concentration. The three stepwise processes were designed to remove (1) small particles, COD, and phosphorus in the 1st heterotrophic C. sorokiniana cultivation, (2) ammonia and COD in the 2nd mixotrophic Coelastrella sp. cultivation, and (3) the remaining ammonia in the 3rd photoautotrophic A. nygaardii cultivation. To enhance ammonia uptake rate, each algal species were inoculated after 2-day nitrogen starvation. When the N-starved three species were inoculated at each step sequentially at 7 g/L for 2 days, the final phosphorus, COD, and ammonia removal efficiencies were 100% (16.4-0 mg/L), 92% (6820-545 mg/L), 90% (850-81 mg/L) and turbidity (99%) after total 6 days.
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Affiliation(s)
- Sang-Ah Lee
- Cell Factory Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, South Korea; Department of Environmental Biotechnology, KRIBB School of Biotechnology, University of Science and Technology (UST), 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, South Korea
| | - Nakyeong Lee
- Cell Factory Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, South Korea
| | - Hee-Mock Oh
- Cell Factory Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, South Korea; Department of Environmental Biotechnology, KRIBB School of Biotechnology, University of Science and Technology (UST), 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, South Korea
| | - Chi-Yong Ahn
- Cell Factory Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, South Korea; Department of Environmental Biotechnology, KRIBB School of Biotechnology, University of Science and Technology (UST), 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, South Korea.
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Xu X, Zhang W, Gu X, Guo Z, Song J, Zhu D, Liu Y, Liu Y, Xue G, Li X, Makinia J. Stabilizing lactate production through repeated batch fermentation of food waste and waste activated sludge. BIORESOURCE TECHNOLOGY 2020; 300:122709. [PMID: 31901771 DOI: 10.1016/j.biortech.2019.122709] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Revised: 12/25/2019] [Accepted: 12/27/2019] [Indexed: 06/10/2023]
Abstract
Bio-valorization of organic waste streams, such as food waste and waste activated sludge, to lactic acid (LA) has recently drawn much attention. It offers an opportunity for resource recovery, alleviates environmental issues and potentially turns a profit. In this study, both stable and high LA yield (0.72 ± 0.15 g/g total chemical oxygen demand) and productivity rate (0.53 g/L•h) were obtained through repeated batch fermentation. Moreover, stable solubilization and increase in the critical hydrolase activities were achieved. Depletions of ammonia and phosphorus were correlated with the LA production. The relative abundance of the key LA bacteria genera (i.e., Alkaliphilus, Dysgonomonas, Enterococcus and Bifidobacterium) stabilized in the repeated batch reactor at a higher level (44.5 ± 2.53%) in comparison with the batch reactor (26.2 ± 4.74%). This work show a practical way for the sustainable valorization of organic wastes to LA by applying the repeated batch mode during biological treatment.
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Affiliation(s)
- Xianbao Xu
- College of Environmental Science and Engineering, Donghua University, 2999 North Renmin Road, Shanghai 201620, China
| | - Wenjuan Zhang
- College of Environmental Science and Engineering, Donghua University, 2999 North Renmin Road, Shanghai 201620, China
| | - Xia Gu
- College of Environmental Science and Engineering, Donghua University, 2999 North Renmin Road, Shanghai 201620, China
| | - Zhichao Guo
- College of Environmental Science and Engineering, Donghua University, 2999 North Renmin Road, Shanghai 201620, China
| | - Jian Song
- College of Environmental Science and Engineering, Donghua University, 2999 North Renmin Road, Shanghai 201620, China
| | - Daan Zhu
- College of Environmental Science and Engineering, Donghua University, 2999 North Renmin Road, Shanghai 201620, China
| | - Yanbiao Liu
- College of Environmental Science and Engineering, Donghua University, 2999 North Renmin Road, Shanghai 201620, China
| | - Yanan Liu
- College of Environmental Science and Engineering, Donghua University, 2999 North Renmin Road, Shanghai 201620, China
| | - Gang Xue
- College of Environmental Science and Engineering, Donghua University, 2999 North Renmin Road, Shanghai 201620, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China
| | - Xiang Li
- College of Environmental Science and Engineering, Donghua University, 2999 North Renmin Road, Shanghai 201620, China.
| | - Jacek Makinia
- Faculty of Civil and Environmental Engineering, Gdansk University of Technology, ul. Narutowicza 11/12, 80-233 Gdansk, Poland
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Chowdury KH, Nahar N, Deb UK. The Growth Factors Involved in Microalgae Cultivation for Biofuel Production: A Review. ACTA ACUST UNITED AC 2020. [DOI: 10.4236/cweee.2020.94012] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Nzayisenga JC, Farge X, Groll SL, Sellstedt A. Effects of light intensity on growth and lipid production in microalgae grown in wastewater. BIOTECHNOLOGY FOR BIOFUELS 2020; 13:4. [PMID: 31921352 PMCID: PMC6945461 DOI: 10.1186/s13068-019-1646-x] [Citation(s) in RCA: 90] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Accepted: 12/27/2019] [Indexed: 05/19/2023]
Abstract
BACKGROUND Cultivation of microalgae in wastewater could significantly contribute to wastewater treatment, biodiesel production, and thus the transition to renewable energy. However, more information on effects of environmental factors, including light intensity, on their growth and composition (particularly fatty acid contents) is required. Therefore, we investigated the biomass and fatty acid production of four microalgal species, isolated in the Northern hemisphere and grown at three light intensities (50, 150 and 300 μE m-2 s-1). RESULTS Increases in light intensities resulted in higher biomass of all four species and, importantly, raised fatty acid contents of both Desmodesmus sp. and Scenedesmus obliquus. Fourier-transform IR spectrometry analysis showed that the increases in fatty acid content were associated with reductions in protein, but not carbohydrate, contents. Assessment of fatty acid composition revealed that increasing light intensity led to higher and lower contents of oleic (18:1) and linolenic (18:3) acids, respectively. The microalgae consumed more than 75% of the nitrogen and phosphorus present in the wastewater used as growth medium. CONCLUSION The results show the importance of optimizing light intensities to improve fatty acid production by microalgae and their quality as sources of biodiesel. In addition, increase in fatty acid content is associated with decrease in protein content.
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Affiliation(s)
| | - Xavier Farge
- Department of Plant Physiology, UPSC, Umea University, 90187 Umea, Sweden
- Present Address: Graduate School of Biotechnology of Strasbourg (ESBS), Unistra, 67400 Illkirch-Graffenstaden, France
| | | | - Anita Sellstedt
- Department of Plant Physiology, UPSC, Umea University, 90187 Umea, Sweden
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20
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Biomass and lipid induction strategies in microalgae for biofuel production and other applications. Microb Cell Fact 2019; 18:178. [PMID: 31638987 PMCID: PMC6805540 DOI: 10.1186/s12934-019-1228-4] [Citation(s) in RCA: 121] [Impact Index Per Article: 20.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Accepted: 10/04/2019] [Indexed: 11/20/2022] Open
Abstract
The use of fossil fuels has been strongly related to critical problems currently affecting society, such as: global warming, global greenhouse effects and pollution. These problems have affected the homeostasis of living organisms worldwide at an alarming rate. Due to this, it is imperative to look for alternatives to the use of fossil fuels and one of the relevant substitutes are biofuels. There are different types of biofuels (categories and generations) that have been previously explored, but recently, the use of microalgae has been strongly considered for the production of biofuels since they present a series of advantages over other biofuel production sources: (a) they don’t need arable land to grow and therefore do not compete with food crops (like biofuels produced from corn, sugar cane and other plants) and; (b) they exhibit rapid biomass production containing high oil contents, at least 15 to 20 times higher than land based oleaginous crops. Hence, these unicellular photosynthetic microorganisms have received great attention from researches to use them in the large-scale production of biofuels. However, one disadvantage of using microalgae is the high economic cost due to the low-yields of lipid content in the microalgae biomass. Thus, development of different methods to enhance microalgae biomass, as well as lipid content in the microalgae cells, would lead to the development of a sustainable low-cost process to produce biofuels. Within the last 10 years, many studies have reported different methods and strategies to induce lipid production to obtain higher lipid accumulation in the biomass of microalgae cells; however, there is not a comprehensive review in the literature that highlights, compares and discusses these strategies. Here, we review these strategies which include modulating light intensity in cultures, controlling and varying CO2 levels and temperature, inducing nutrient starvation in the culture, the implementation of stress by incorporating heavy metal or inducing a high salinity condition, and the use of metabolic and genetic engineering techniques coupled with nanotechnology.
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21
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Seo SH, Srivastava A, Han MS, Lee HG, Oh HM. Maximizing biomass and lipid production in Ettlia sp. by ultraviolet stress in a continuous culture. BIORESOURCE TECHNOLOGY 2019; 288:121472. [PMID: 31125934 DOI: 10.1016/j.biortech.2019.121472] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Revised: 05/02/2019] [Accepted: 05/10/2019] [Indexed: 06/09/2023]
Abstract
Lipid production in microalgae can be induced by various stress factors. However, stress induced lipid accumulation requires considerable time leading to the decrease in lipid productivity. Here, we attempted to increase the lipid productivity while maintaining the high growth of Ettlia sp. by optimizing nitrogen concentration and UV exposure in a continuous culture. The biomass and lipid productivities of Ettlia sp. cultured with 150 mg N L-1 and UV-A added PAR were 1.67 ± 0.08 g L-1 d-1 and 0.55 ± 0.05 g L-1 d-1, respectively. Lipid productivity and lipid content were around 43.7% and 33.7% higher, respectively in UV-A treatment compared to the control. Moreover, gene-expression patterns related to antioxidant defense and intracellular ROS levels indicated that UV-A affected certain ROS and antioxidants pathways and successfully induced the lipid accumulation in Ettlia sp. This strategy to activate lipid accumulation can be applied in other microalgae without affecting their growth.
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Affiliation(s)
- Seong-Hyun Seo
- Cell Factory Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea; Department of Life Science, Hanyang University, Seoul 04763, Republic of Korea
| | - Ankita Srivastava
- Cell Factory Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Myung-Soo Han
- Department of Life Science, Hanyang University, Seoul 04763, Republic of Korea
| | - Hyung-Gwan Lee
- Cell Factory Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Hee-Mock Oh
- Cell Factory Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea.
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Cho K, Cho DH, Heo J, Kim U, Lee YJ, Choi DY, Kim HS. Nitrogen modulation under chemostat cultivation mode induces biomass and lipid production by Chlorella vulgaris and reduces antenna pigment accumulation. BIORESOURCE TECHNOLOGY 2019; 281:118-125. [PMID: 30811998 DOI: 10.1016/j.biortech.2019.02.063] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Revised: 02/11/2019] [Accepted: 02/12/2019] [Indexed: 06/09/2023]
Abstract
Algal growth limitation in large-scale cultivation mostly results from high level synthesis of photosynthetic pigments, owing to self-shading effects and attenuation of light distribution. To overcome this problem, here we investigated the influence of nitrogen modulation on changes in antenna pigments as well as biomass and lipid production by Chlorella vulgaris under a chemostat continuous cultivation mode. The production of algal antenna pigments, including chlorophylls and carotenoids, was promoted in a total nitrogen (TN) concentration-dependent manner. Maximum algal biomass and lipid production were obtained from 70 mg/L of TN concentration along with a significant increase in light transmittance and reduction in antenna pigments. Furthermore, the composition of polyunsaturated fatty acids remarkably augmented at low TN concentrations. These results suggest that the reduction in algal antenna pigment synthesis via modulation of nitrogen concentration may serve as an effective strategy to enhance algal biomass and lipid production.
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Affiliation(s)
- Kichul Cho
- Cell Factory Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon 34141, Republic of Korea
| | - Dae-Hyun Cho
- Cell Factory Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon 34141, Republic of Korea
| | - Jina Heo
- Cell Factory Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon 34141, Republic of Korea; Department of Environmental Biotechnology, KRIBB School of Biotechnology, Korea University of Science & Technology (UST), Daejeon 34113, Republic of Korea
| | - Urim Kim
- Cell Factory Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon 34141, Republic of Korea; Department of Environmental Biotechnology, KRIBB School of Biotechnology, Korea University of Science & Technology (UST), Daejeon 34113, Republic of Korea
| | - Yong Jae Lee
- Cell Factory Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon 34141, Republic of Korea
| | - Dong-Yun Choi
- Cell Factory Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon 34141, Republic of Korea
| | - Hee-Sik Kim
- Cell Factory Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon 34141, Republic of Korea; Department of Environmental Biotechnology, KRIBB School of Biotechnology, Korea University of Science & Technology (UST), Daejeon 34113, Republic of Korea.
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Vu CHT, Chun SJ, Seo SH, Cui Y, Ahn CY, Oh HM. Bacterial community enhances flocculation efficiency of Ettlia sp. by altering extracellular polymeric substances profile. BIORESOURCE TECHNOLOGY 2019; 281:56-65. [PMID: 30797175 DOI: 10.1016/j.biortech.2019.02.062] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Revised: 02/11/2019] [Accepted: 02/12/2019] [Indexed: 06/09/2023]
Abstract
This study examined the effects of a bacterial community and extracellular polymeric substances (EPS) on Ettlia sp. flocculation. The growth rate, flocculation efficiency (FE), bacterial community, and EPS profile of axenic and xenic Ettlia cultures were monitored during 46 days of cultivation. For the xenic culture, with a great abundance of growth-promoting and flocculation-inducing bacteria, the biomass density was 18.75% higher and its FE reached 100% in the mid-stationary phase. Moreover, microscopic observation and a quantitative analysis of the EPS revealed the exclusive presence of long filamentous EPS and more compact structure in the xenic Ettlia culture, possibly explaining its better FE. Notwithstanding, for the axenic culture, despite a lower biomass density and reduced abundance of EPS, its FE reached 92.54% in the mid-stationary phase. Thus, the role of the bacterial community was found to be supportive rather than vital for the high settleability of the self-flocculating Ettlia microalgal culture.
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Affiliation(s)
- Chau Hai Thai Vu
- Cell Factory Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea; Department of Environmental Biotechnology, KRIBB School of Biotechnology, Korea University of Science & Technology (UST), 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Republic of Korea
| | - Seong-Jun Chun
- Cell Factory Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea; Department of Environmental Biotechnology, KRIBB School of Biotechnology, Korea University of Science & Technology (UST), 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Republic of Korea
| | - Seong-Hyun Seo
- Cell Factory Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea; Department of Life Science, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea
| | - Yingshun Cui
- Cell Factory Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Chi-Yong Ahn
- Cell Factory Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea; Department of Environmental Biotechnology, KRIBB School of Biotechnology, Korea University of Science & Technology (UST), 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Republic of Korea
| | - Hee-Mock Oh
- Cell Factory Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea; Department of Environmental Biotechnology, KRIBB School of Biotechnology, Korea University of Science & Technology (UST), 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Republic of Korea.
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Kim M, Lee B, Kim HS, Nam K, Moon M, Oh HM, Chang YK. Increased biomass and lipid production of Ettlia sp. YC001 by optimized C and N sources in heterotrophic culture. Sci Rep 2019; 9:6830. [PMID: 31048751 PMCID: PMC6497641 DOI: 10.1038/s41598-019-43366-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Accepted: 04/17/2019] [Indexed: 01/21/2023] Open
Abstract
The culture conditions and media composition for the heterotrophic culture of an axenic strain of Ettlia sp. YC001 were firstly optimized using the Plackett-Burman design (PBD) and response surface methodology (RSM). The strain successfully showed higher productivity in the basal media without any light illumination at 32.2 to 33.3 °C. The PBD results showed that the most effective components for biomass productivity of Ettlia sp. were fructose and yeast extract for sources of C and N, respectively. The RSM results showed an optimal level of 72.2 g/L for fructose and 21.5 g/L for yeast extract, resulting in 46.1 g/L biomass with a lipid content of 13.8% over a course of 9 days. Using a 5 L scaled-up fermentation system for 6 days, the production of biomass and lipids was 7.21 g/L/day and 1.18 g/L/day, respectively. Consequently, heterotrophic cultivation of Ettlia sp. YC001 provided much higher production of biomass and lipids than those of autotrophic cultivation. As further research, the use of substitute substrates instead of fructose and yeast extract should be developed to reduce production costs.
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Affiliation(s)
- Minsik Kim
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Bongsoo Lee
- Department of Microbial and Nano Materials, Mokwon University, 88 Doanbuk-ro, Yuseong-gu, Daejeon, 35349, Republic of Korea
| | - Hee Su Kim
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Kibok Nam
- LG Chem, 30 Magokjungang 10-ro, Gangseo-gu, Seoul, 07796, Republic of Korea
| | - Myounghoon Moon
- Gwangju Bio/Energy R&D Center, Korea Institute of Energy Research (KIER), 270-25 Samso-ro, Buk-gu, Gwangju, 61003, Republic of Korea
| | - Hee-Mock Oh
- Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea.
| | - Yong Keun Chang
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea. .,Advanced Biomass R&D Center (ABC), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea.
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25
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Chen JH, Chen CY, Hasunuma T, Kondo A, Chang CH, Ng IS, Chang JS. Enhancing lutein production with mixotrophic cultivation of Chlorella sorokiniana MB-1-M12 using different bioprocess operation strategies. BIORESOURCE TECHNOLOGY 2019; 278:17-25. [PMID: 30669027 DOI: 10.1016/j.biortech.2019.01.041] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2018] [Revised: 01/08/2019] [Accepted: 01/09/2019] [Indexed: 06/09/2023]
Abstract
A lutein-enriched mutant, Chlorella sorokiniana MB-1-M12 was grown mixotrophically for lutein production. The lutein production efficiency of the strain was enhanced via optimizing the operating strategies. The results show that using semi-continuous cultivation with a medium replacement ratio of 75% resulted in a higher lutein productivity and lutein concentration of 6.24 mg/L/d and 50.6 mg/L, respectively, which were markedly higher than those obtained from batch and fed-batch cultivation. Cultivation under simulated outdoor cultivation conditions (i.e., temperature of 35 °C/25 °C for a 12 h/12 h light/dark cycle) could achieve the highest lutein productivity and lutein concentration of 3.34 mg/L/d and 30.8 mg/L, respectively. Lutein production via outdoor cultivation of MB-1-M12 strain with a 60-L tubular photobioreactor was performed using semi-continuous operation. With a medium replacement ratio of 75%, a good lutein productivity (4.46 mg/L/d) and concentration (27.4 mg/L) was obtained, indicating the feasibility of producing lutein under outdoor cultivation of the microalgal strain.
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Affiliation(s)
- Jih-Heng Chen
- Department of Chemical Engineering, National Cheng Kung University, Tainan 701, Taiwan
| | - Chun-Yen Chen
- University Center for Bioscience and Biotechnology, National Cheng Kung University, Tainan 701, Taiwan
| | - Tomohisa Hasunuma
- Graduate School of Science, Technology and Innovation, Kobe University, 1-1 Rokkodai, Nada-Ku, Kobe 657-8501, Japan
| | - Akihiko Kondo
- Graduate School of Science, Technology and Innovation, Kobe University, 1-1 Rokkodai, Nada-Ku, Kobe 657-8501, Japan; Department of Chemical Science and Engineering, Graduate School of Engineering, Kobe University, 1-1 Rokkodai, Nada-Ku, Kobe 657-8501, Japan
| | - Chien-Hsiang Chang
- Department of Chemical Engineering, National Cheng Kung University, Tainan 701, Taiwan
| | - I-Son Ng
- Department of Chemical Engineering, National Cheng Kung University, Tainan 701, Taiwan
| | - Jo-Shu Chang
- Department of Chemical Engineering, National Cheng Kung University, Tainan 701, Taiwan; Research Center for Energy Technology and Strategy, National Cheng Kung University, Tainan 701, Taiwan; Research Center for Circular Economy, National Cheng Kung University, Tainan 701, Taiwan; College of Engineering, Tunghai University, Taichung 407, Taiwan.
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26
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Sun Y, Liao Q, Huang Y, Xia A, Fu Q, Zhu X, Fu J, Li J. Application of growth-phase based light-feeding strategies to simultaneously enhance Chlorella vulgaris growth and lipid accumulation. BIORESOURCE TECHNOLOGY 2018; 256:421-430. [PMID: 29477080 DOI: 10.1016/j.biortech.2018.02.045] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2018] [Revised: 02/07/2018] [Accepted: 02/08/2018] [Indexed: 06/08/2023]
Abstract
Considering the variations of optimal light intensity required by microalgae cells along with growth phases, growth-phase light-feeding strategies were proposed and verified in this paper, aiming at boosting microalgae lipid productivity from the perspective of light conditions optimization. Experimental results demonstrate that under an identical time-averaged light intensity, the light-feeding strategies characterized by stepwise incremental light intensities showed a positive effect on biomass and lipid accumulation. The lipid productivity (235.49 mg L-1 d-1) attained under light-feeding strategy V (time-averaged light intensity: 225 μmol m-2 s-1) was 52.38% higher over that obtained under a constant light intensity of 225 μmol m-2 s-1. Subsequently, based on light-feeding strategy V, microalgae lipid productivity was further elevated to 312.92 mg L-1 d-1 employing a two-stage based light-feeding strategy V560 (time-averaged light intensity: 360 μmol m-2 s-1), which was 79.63% higher relative to that achieved under a constant light intensity of 360 μmol m-2 s-1.
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Affiliation(s)
- Yahui Sun
- Key Laboratory of Low-Grade Energy Utilization Technologies and Systems, Chongqing University, Ministry of Education, Chongqing 400044, China; Institute of Engineering Thermophysics, Chongqing University, Chongqing 400044, China
| | - Qiang Liao
- Key Laboratory of Low-Grade Energy Utilization Technologies and Systems, Chongqing University, Ministry of Education, Chongqing 400044, China; Institute of Engineering Thermophysics, Chongqing University, Chongqing 400044, China.
| | - Yun Huang
- Key Laboratory of Low-Grade Energy Utilization Technologies and Systems, Chongqing University, Ministry of Education, Chongqing 400044, China; Institute of Engineering Thermophysics, Chongqing University, Chongqing 400044, China
| | - Ao Xia
- Key Laboratory of Low-Grade Energy Utilization Technologies and Systems, Chongqing University, Ministry of Education, Chongqing 400044, China; Institute of Engineering Thermophysics, Chongqing University, Chongqing 400044, China
| | - Qian Fu
- Key Laboratory of Low-Grade Energy Utilization Technologies and Systems, Chongqing University, Ministry of Education, Chongqing 400044, China; Institute of Engineering Thermophysics, Chongqing University, Chongqing 400044, China
| | - Xun Zhu
- Key Laboratory of Low-Grade Energy Utilization Technologies and Systems, Chongqing University, Ministry of Education, Chongqing 400044, China; Institute of Engineering Thermophysics, Chongqing University, Chongqing 400044, China
| | - Jingwei Fu
- Key Laboratory of Low-Grade Energy Utilization Technologies and Systems, Chongqing University, Ministry of Education, Chongqing 400044, China; Institute of Engineering Thermophysics, Chongqing University, Chongqing 400044, China
| | - Jun Li
- Key Laboratory of Low-Grade Energy Utilization Technologies and Systems, Chongqing University, Ministry of Education, Chongqing 400044, China; Institute of Engineering Thermophysics, Chongqing University, Chongqing 400044, China
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27
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Morales M, Sánchez L, Revah S. The impact of environmental factors on carbon dioxide fixation by microalgae. FEMS Microbiol Lett 2017; 365:4705896. [DOI: 10.1093/femsle/fnx262] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Accepted: 12/04/2017] [Indexed: 11/12/2022] Open
Affiliation(s)
- Marcia Morales
- Departamento de Procesos y Tecnología, Universidad Autónoma Metropolitana-Cuajimalpa, Av. Vasco de Quiroga 4871, colonia Santa Fe Cuajimalpa, CP 05300, Ciudad de México, Mexico
| | - León Sánchez
- Doctorado en Biotecnología, Universidad Autónoma Metropolitana-Iztapalapa, San Rafael Atlixco 186, CP 09340, Ciudad de México, Mexico
| | - Sergio Revah
- Departamento de Procesos y Tecnología, Universidad Autónoma Metropolitana-Cuajimalpa, Av. Vasco de Quiroga 4871, colonia Santa Fe Cuajimalpa, CP 05300, Ciudad de México, Mexico
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