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Dulong V, Rihouey C, Gaignard C, Bridiau N, Gourvil P, Laroche C, Pierre G, Varacavoudin T, Probert I, Maugard T, Michaud P, Picton L, Le Cerf D. Exopolysaccharide from marine microalgae belonging to the Glossomastix genus: fragile gel behavior and suspension stability. Bioengineered 2024; 15:2296257. [PMID: 38153265 PMCID: PMC10761178 DOI: 10.1080/21655979.2023.2296257] [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: 10/16/2023] [Accepted: 12/13/2023] [Indexed: 12/29/2023] Open
Abstract
With the aim to find new polysaccharides of rheological interest with innovated properties, rhamnofucans produced as exopolysaccharides (EPS) in a photobioreactor (PBR) and an airlift bioreactor (ABR) by the marine microalgae Glossomastix sp. RCC3707 and RCC3688 were fully studied. Chemical characterizations have been conducted (UHPLC - MS HR). Analyses by size-exclusion chromatography (SEC) coupled online with a multiangle light scattering detector (MALS) and a differential refractive index detector showed the presence of large structures with molar masses higher than 106 g.mol-1. The rheological studies of these EPS solutions, conducted at different concentrations and salinities, have evidenced interesting and rare behavior characteristic of weak and fragile hydrogels i.e. gel behavior with very low elastic moduli (between 10-2 and 10 Pa) and yield stresses (between 10-2 and 2 Pa) according to the EPS source, concentration, and salinity. These results were confirmed by diffusing wave spectroscopy. Finally, as one of potential application, solutions of EPS from Glossomastix sp. have evidenced very good properties as anti-settling stabilizers, using microcrystalline cellulose particles as model, studied by multiple light scattering (MLS) with utilization in cosmetic or food industry. Compared to alginate solution with same viscosity for which sedimentation is observed over few hours, microalgae EPS leads to a stable suspension over few days.
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Affiliation(s)
- Virginie Dulong
- Université de Rouen Normandie, INSA Rouen Normandie, CNRS, PBS Laboratory, Rouen, France
| | - Christophe Rihouey
- Université de Rouen Normandie, INSA Rouen Normandie, CNRS, PBS Laboratory, Rouen, France
| | - Clément Gaignard
- Université Clermont Auvergne, Clermont Auvergne INP, CNRS, Institut Pascal, Clermont-Ferrand, France
| | - Nicolas Bridiau
- La Rochelle Université, CNRS, LIENSs Laboratory, La Rochelle, France
| | - Priscilla Gourvil
- Station Biologique de Roscoff (SBR), Sorbonne Université, CNRS, Roscoff, France
| | - Céline Laroche
- Université Clermont Auvergne, Clermont Auvergne INP, CNRS, Institut Pascal, Clermont-Ferrand, France
| | - Guillaume Pierre
- Université Clermont Auvergne, Clermont Auvergne INP, CNRS, Institut Pascal, Clermont-Ferrand, France
| | - Tony Varacavoudin
- Université de Rouen Normandie, INSA Rouen Normandie, CNRS, PBS Laboratory, Rouen, France
| | - Ian Probert
- Station Biologique de Roscoff (SBR), Sorbonne Université, CNRS, Roscoff, France
| | - Thierry Maugard
- La Rochelle Université, CNRS, LIENSs Laboratory, La Rochelle, France
| | - Philippe Michaud
- Université Clermont Auvergne, Clermont Auvergne INP, CNRS, Institut Pascal, Clermont-Ferrand, France
| | - Luc Picton
- Université de Rouen Normandie, INSA Rouen Normandie, CNRS, PBS Laboratory, Rouen, France
| | - Didier Le Cerf
- Université de Rouen Normandie, INSA Rouen Normandie, CNRS, PBS Laboratory, Rouen, France
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Ciani M, Decorosi F, Ratti C, De Philippis R, Adessi A. Semi-continuous cultivation of EPS-producing marine cyanobacteria: A green biotechnology to remove dissolved metals obtaining metal-organic materials. N Biotechnol 2024; 82:33-42. [PMID: 38714292 DOI: 10.1016/j.nbt.2024.04.004] [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: 01/15/2024] [Revised: 04/29/2024] [Accepted: 04/30/2024] [Indexed: 05/09/2024]
Abstract
Given the necessity for bioprocesses scaling-up, the present study aims to explore the potential of three marine cyanobacteria and a consortium, cultivated in semi-continuous mode, as a green approach for i) continuous exopolysaccharide-rich biomass production and ii) removal of positively charged metals (Cu, Ni, Zn) from mono and multi-metallic solutions. To ensure the effectiveness of both cellular and released exopolysaccharides, weekly harvested whole cultures were confined in dialysis tubings. The results revealed that all the tested cyanobacteria have a stronger affinity towards Cu in mono and three-metal systems. Despite the amount of metals removed per gram of biomass decreased with higher biosorbent dosage, the more soluble carbohydrates were produced, the greater was the metal uptake, underscoring the pivotal role of released exopolysaccharides in metal biosorption. According to this, Dactylococcopsis salina 16Som2 showed the highest carbohydrate productivity (142 mg L-1 d-1) and metal uptake (84 mg Cu g-1 biomass) representing a promising candidate for further studies. The semi-continuous cultivation of marine cyanobacteria here reported assures a schedulable production of exopolysaccharide-rich biosorbents with high metal removal and recovery potential, even from multi-metallic solutions, as a step forward in the industrial application of cyanobacteria.
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Affiliation(s)
- Matilde Ciani
- Department of Agriculture, Food, Environment and Forestry (DAGRI), University of Florence, Piazzale delle Cascine, 18, 50144 Florence, Italy
| | - Francesca Decorosi
- Genexpress Laboratory, Department of Agronomy, Food, Environmental and Forestry Sciences (DAGRI), University of Florence, I-50019 Sesto Fiorentino, Italy
| | - Claudio Ratti
- Department of Agricultural and Food Sciences, University of Bologna, Viale G. Fanin, 40, 40127 Bologna, Italy
| | - Roberto De Philippis
- Department of Agriculture, Food, Environment and Forestry (DAGRI), University of Florence, Piazzale delle Cascine, 18, 50144 Florence, Italy
| | - Alessandra Adessi
- Department of Agriculture, Food, Environment and Forestry (DAGRI), University of Florence, Piazzale delle Cascine, 18, 50144 Florence, Italy.
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Caichiolo M, Zampieri RM, Adessi A, Ciani M, Caldara F, Dalla Valle L, La Rocca N. Microbial Polysaccharides Extracted from Different Mature Muds of the Euganean Thermal District Show Similar Anti-Inflammatory Activity In Vivo. Int J Mol Sci 2024; 25:4999. [PMID: 38732217 PMCID: PMC11084611 DOI: 10.3390/ijms25094999] [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: 03/15/2024] [Revised: 04/29/2024] [Accepted: 04/30/2024] [Indexed: 05/13/2024] Open
Abstract
The Euganean Thermal District, situated in North-East Italy, is one of Europe's largest and oldest thermal centres. The topical application of its therapeutic thermal muds is recognised by the Italian Health System as a beneficial treatment for patients suffering from arthro-rheumatic diseases. Polysaccharides produced by the mud microbiota have been recently identified as anti-inflammatory bioactive molecules. In this paper we analysed the efficacy of Microbial-Polysaccharides (M-PS) derived from mature muds obtained at different maturation temperatures, both within and outside the codified traditional mud maturation range. M-PSs were extracted from six mature muds produced by five spas of the Euganean Thermal District and investigated for their chemical properties, monosaccharide composition and in vivo anti-inflammatory potential, using the zebrafish model organism. Additionally, mature muds were characterized for their microbiota composition using Next-Generation Sequencing. The results showed that all M-PSs exhibit similar anti-inflammatory potential, referable to their comparable chemical composition. This consistency was observed despite changes in cyanobacteria populations, suggesting a possible role of the entire microbial community in shaping the properties of these biomolecules. These findings highlight the importance of scientific research in untangling the origins of the therapeutic efficacy of Euganean Thermal muds in the treatment of chronic inflammatory conditions.
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Affiliation(s)
- Micol Caichiolo
- Department of Biology, University of Padova, Via U. Bassi 58/b, 35131 Padova, Italy; (M.C.); (R.M.Z.); (N.L.R.)
| | - Raffaella Margherita Zampieri
- Department of Biology, University of Padova, Via U. Bassi 58/b, 35131 Padova, Italy; (M.C.); (R.M.Z.); (N.L.R.)
- Research Institute on Terrestrial Ecosystems (IRET), National Research Council (CNR), Via Madonna del Piano 10, 50019 Firenze, Italy
| | - Alessandra Adessi
- Department of Agriculture, Food, Environment and Forest (DAGRI), University of Florence, Via Maragliano 77, 50144 Firenze, Italy; (A.A.); (M.C.)
| | - Matilde Ciani
- Department of Agriculture, Food, Environment and Forest (DAGRI), University of Florence, Via Maragliano 77, 50144 Firenze, Italy; (A.A.); (M.C.)
| | - Fabrizio Caldara
- Pietro D’Abano Thermal Studies Center, Via Jappelli 5, 35031 Padova, Italy;
| | - Luisa Dalla Valle
- Department of Biology, University of Padova, Via U. Bassi 58/b, 35131 Padova, Italy; (M.C.); (R.M.Z.); (N.L.R.)
| | - Nicoletta La Rocca
- Department of Biology, University of Padova, Via U. Bassi 58/b, 35131 Padova, Italy; (M.C.); (R.M.Z.); (N.L.R.)
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Mouga T, Pereira J, Moreira V, Afonso C. Unveiling the Cultivation of Nostoc sp. under Controlled Laboratory Conditions. BIOLOGY 2024; 13:306. [PMID: 38785788 PMCID: PMC11118237 DOI: 10.3390/biology13050306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2024] [Revised: 04/24/2024] [Accepted: 04/26/2024] [Indexed: 05/25/2024]
Abstract
Cyanobacteria, photoautotrophic Gram-negative bacteria, play a crucial role in aquatic and terrestrial environments, contributing significantly to fundamental ecological processes and displaying potential for various biotechnological applications. It is, therefore, critical to identify viable strains for aquaculture and establish accurate culture parameters to ensure an extensive biomass supply for biotechnology purposes. This study aims to establish optimal laboratory batch culture conditions for Nostoc 136, sourced from Alga2O, Coimbra, Portugal. Preliminary investigations were conducted to identify the optimal culture parameters and to perform biomass analysis, including protein and pigment content. The highest growth was achieved with an initial inoculum concentration of 1 g.L-1, using modified BG11 supplemented with nitrogen, resulting in a Specific Growth Rate (SGR) of 0.232 ± 0.017 μ.day-1. When exposed to white, red, and blue LED light, the most favourable growth occurred under a combination of white and red LED light exhibiting an SGR of 0.142 ± 0.020 μ.day-1. The protein content was determined to be 10.80 ± 2.09%. Regarding the pigments, phycocyanin reached a concentration of 200.29 ± 30.07 µg.mL-1, phycoerythrin 148.29 ± 26.74 µg.mL-1, and allophycocyanin 10.69 ± 6.07 µg.mL-1. This study underscores the influence of light and nutrient supplementation on the growth of the Nostoc biomass.
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Affiliation(s)
- Teresa Mouga
- MARE-Marine and Environment Research Center/ARNET-Aquatic Research Network, School of Tourism and Maritime Technology, Polytechnic University of Leiria, 2520-614 Peniche, Portugal
| | - Jéssica Pereira
- School of Tourism and Maritime Technology, Polytechnic University of Leiria, 2520-614 Peniche, Portugal
| | - Vitória Moreira
- School of Tourism and Maritime Technology, Polytechnic University of Leiria, 2520-614 Peniche, Portugal
| | - Clélia Afonso
- MARE-Marine and Environment Research Center/ARNET-Aquatic Research Network, School of Tourism and Maritime Technology, Polytechnic University of Leiria, 2520-614 Peniche, Portugal
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Debnath S, Muthuraj M, Bandyopadhyay TK, Bobby MN, Vanitha K, Tiwari ON, Bhunia B. Engineering strategies and applications of cyanobacterial exopolysaccharides: A review on past achievements and recent perspectives. Carbohydr Polym 2024; 328:121686. [PMID: 38220318 DOI: 10.1016/j.carbpol.2023.121686] [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: 03/24/2023] [Revised: 11/08/2023] [Accepted: 12/08/2023] [Indexed: 01/16/2024]
Abstract
Cyanobacteria are ideally suited for developing sustainable biological products but are underdeveloped due to a lack of genetic tools. Exopolysaccharide (EPS) is one of the essential bioproducts with widespread industrial applications. Despite their unique structural characteristics associated with distinct biological and physicochemical aspects, EPS from cyanobacteria has been underexplored. However, it is expected to accelerate in the near future due to the utilization of low-cost cyanobacterial platforms and readily available information on the structural data and specific features of these biopolymers. In recent years, cyanobacterial EPSs have attracted growing scientific attention due to their simple renewability, rheological characteristics, massive production, and potential uses in several biotechnology domains. This review focuses on the most recent research on potential new EPS producers and their distinct compositions responsible for novel biological activities. Additionally, nutritional and process parameters discovered recently for enhancing EPS production and engineering strategies applied currently to control the biosynthetic pathway for enhanced EPS production are critically highlighted. The process intensification of previously developed EPS extraction and purification processes from cyanobacterial biomass is also extensively explained. Furthermore, the newly reported biotechnological applications of cyanobacterial exopolysaccharides are also discussed.
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Affiliation(s)
- Shubhankar Debnath
- Bioproducts Processing Research Laboratory (BPRL), Department of Bio Engineering, National Institute of Technology, Agartala 799046, India
| | - Muthusivaramapandian Muthuraj
- Bioproducts Processing Research Laboratory (BPRL), Department of Bio Engineering, National Institute of Technology, Agartala 799046, India.
| | | | - Md Nazneen Bobby
- Department of Biotechnology, Vignan's Foundation for Science Technology and Research, Guntur 522213, Andhra Pradesh, India
| | - Kondi Vanitha
- Department of Pharmaceutics, Vishnu Institute of Pharmaceutical Education and Research, Narsapur, Medak, Telangana, India
| | - Onkar Nath Tiwari
- Centre for Conservation and Utilization of Blue Green Algae, Division of Microbiology, Indian Agricultural Research Institute (ICAR), New Delhi 110012, India.
| | - Biswanath Bhunia
- Bioproducts Processing Research Laboratory (BPRL), Department of Bio Engineering, National Institute of Technology, Agartala 799046, India.
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Bhakat S, Mondal A, Mandal S, Rath J. Role of exopolysaccharides of Anabaena sp. in desiccation tolerance and biodeterioration of ancient terracotta monuments of Bishnupur. Arch Microbiol 2024; 206:105. [PMID: 38363385 DOI: 10.1007/s00203-024-03841-8] [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: 11/13/2023] [Revised: 12/23/2023] [Accepted: 01/08/2024] [Indexed: 02/17/2024]
Abstract
Colonization of the cyanobacteria in the Bishnupur terracotta temples, one of the heritage sites of West Bengal, India is in an alarming state of deterioration now. Among the cyanobacteria Anabaena sp. (VBCCA 052002) has been isolated from most of the crust samples of terracotta monuments of Bishnupur. The identification was done using micromorphological characters and confirmed by 16S rRNA gene sequencing. The isolated strain produces enormous exopolysaccharides, which are extracted, hydrolyzed, and analyzed by HPLC. We have studied desiccation tolerance in this cyanobacterium and found biosynthesis of trehalose with an increase in durations of desiccation. The in vitro experiment shows that Chlorophyll-a and carotenoid content increase with fourteen days of desiccation, and cellular carbohydrates increase continuously. However, cellular protein decreases with desiccation. To gain insights into the survival strategies and biodeterioration mechanisms of Anabaena sp. in the desiccated conditions of the Bishnupur monuments, the present study focuses on the physiological aspects of the cyanobacteria under controlled in vitro conditions. Our study indicates that in desiccation conditions, trehalose biosynthesis takes place in Anabaena sp. As a result of the excessive sugar and polysaccharide produced, it adheres to the surface of the terracotta structure. The continuous contraction and expansion of these polysaccharides contribute to the biodeterioration of these monuments.
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Affiliation(s)
- Shailen Bhakat
- Department of Botany, Sambhu Nath College, Labpur, Birbhum, West Bengal, 731303, India
| | - Arka Mondal
- Department of Botany, Visva-Bharati (Central University), Santiniketan, West Bengal, 731235, India
| | - Sikha Mandal
- Department of Botany, Sree Chaitanya College, Habra, West Bengal, 743268, India.
| | - Jnanendra Rath
- Department of Botany, Visva-Bharati (Central University), Santiniketan, West Bengal, 731235, India
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Ben Abdallah M, Chamkha M, Karray F, Sayadi S. Microbial diversity in polyextreme salt flats and their potential applications. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:11371-11405. [PMID: 38180652 DOI: 10.1007/s11356-023-31644-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Accepted: 12/17/2023] [Indexed: 01/06/2024]
Abstract
Recent geological, hydrochemical, and mineralogical studies performed on hypersaline salt flats have given insights into similar geo-morphologic features on Mars. These salt-encrusted depressions are widely spread across the Earth, where they are characterized by high salt concentrations, intense UV radiation, high evaporation, and low precipitation. Their surfaces are completely dry in summer; intermittent flooding occurs in winter turning them into transitory hypersaline lakes. Thanks to new approaches such as culture-dependent, culture-independent, and metagenomic-based methods, it is important to study microbial life under polyextreme conditions and understand what lives in these dynamic ecosystems and how they function. Regarding these particular features, new halophilic microorganisms have been isolated from some salt flats and identified as excellent producers of primary and secondary metabolites and granules such as halocins, enzymes, carotenoids, polyhydroxyalkanoates, and exopolysaccharides. Additionally, halophilic microorganisms are implemented in heavy metal bioremediation and hypersaline wastewater treatment. As a result, there is a growing interest in the distribution of halophilic microorganisms around the world that can be looked upon as good models to develop sustainable biotechnological processes for all fields. This review provides insights into diversity, ecology, metabolism, and genomics of halophiles in hypersaline salt flats worldwide as well as their potential uses in biotechnology.
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Affiliation(s)
- Manel Ben Abdallah
- Laboratory of Environmental Bioprocesses, Centre of Biotechnology of Sfax, BP 1177, 3018, Sfax, Tunisia.
| | - Mohamed Chamkha
- Laboratory of Environmental Bioprocesses, Centre of Biotechnology of Sfax, BP 1177, 3018, Sfax, Tunisia
| | - Fatma Karray
- Laboratory of Environmental Bioprocesses, Centre of Biotechnology of Sfax, BP 1177, 3018, Sfax, Tunisia
| | - Sami Sayadi
- Biotechnology Program, Center for Sustainable Development, College of Arts and Sciences, Qatar University, 2713, Doha, Qatar
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8
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Domozych DS, LoRicco JG. The extracellular matrix of green algae. PLANT PHYSIOLOGY 2023; 194:15-32. [PMID: 37399237 PMCID: PMC10762512 DOI: 10.1093/plphys/kiad384] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 05/25/2023] [Accepted: 05/30/2023] [Indexed: 07/05/2023]
Abstract
Green algae display a wide range of extracellular matrix (ECM) components that include various types of cell walls (CW), scales, crystalline glycoprotein coverings, hydrophobic compounds, and complex gels or mucilage. Recently, new information derived from genomic/transcriptomic screening, advanced biochemical analyses, immunocytochemical studies, and ecophysiology has significantly enhanced and refined our understanding of the green algal ECM. In the later diverging charophyte group of green algae, the CW and other ECM components provide insight into the evolution of plants and the ways the ECM modulates during environmental stress. Chlorophytes produce diverse ECM components, many of which have been exploited for various uses in medicine, food, and biofuel production. This review highlights major advances in ECM studies of green algae.
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Affiliation(s)
- David S Domozych
- Department of Biology, Skidmore College, Saratoga Springs, NY 12866, USA
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9
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Arslan NP, Dawar P, Albayrak S, Doymus M, Azad F, Esim N, Taskin M. Fungi-derived natural antioxidants. Crit Rev Food Sci Nutr 2023:1-24. [PMID: 38156661 DOI: 10.1080/10408398.2023.2298770] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2024]
Abstract
In humans, exogenous antioxidants aid the endogenous antioxidant system to detoxify excess ROS generated during oxidative stress, thereby protecting the body against various diseases and stressful conditions. The majority of natural antioxidants available on the consumer market are plant-based; however, fungi are being recognized as alternative sources of various natural antioxidants such as polysaccharides, pigments, peptides, sterols, phenolics, alkaloids, and flavonoids. In addition, some exogenous antioxidants are exclusively found in fungi. Fungi-derived antioxidants exhibit scavenging activities against DPPH, ABTS, hydroxyl, superoxide, hydrogen peroxide, and nitric oxide radicals in vitro. Furthermore, in vivo models, application of fungal-derived antioxidants increase the level of various antioxidant enzymes, such as catalases, superoxide dismutases, and glutathione peroxidases, and reduce the level of malondialdehyde. Therefore, fungi-derived antioxidants have potential to be used in the food, cosmetic, and pharmaceutical industries. This review summarizes the antioxidant potential of different fungi (mushrooms, yeasts, and molds)-derived natural compounds such as polysaccharides, pigments, peptides, ergothioneine, ergosterol, phenolics, alkaloids, etc.
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Affiliation(s)
| | - Pranav Dawar
- Department of Biological Sciences, Texas Tech University, Lubbock, TX, USA
| | - Seyda Albayrak
- Department of Molecular Biology and Genetics, Science Faculty, Ataturk University, Erzurum, Turkey
| | - Meryem Doymus
- Vocational School of Health Services of Hinis, Ataturk University, Erzurum, Turkey
| | - Fakhrul Azad
- Department of Biochemistry and Cell Biology, Chobanian and Avedisian School of Medicine, Boston University, Boston, MA, USA
| | - Nevzat Esim
- Department of Molecular Biology and Genetics, Science and Art Faculty, Bingol University, Bingol, Turkey
| | - Mesut Taskin
- Department of Molecular Biology and Genetics, Science Faculty, Ataturk University, Erzurum, Turkey
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Babich O, Ivanova S, Tupitsyn A, Vladimirov A, Nikolaeva E, Tiwari A, Budenkova E, Kashirskikh E, Anokhova V, Michaud P, Sukhikh S. Study of the polysaccharide production by the microalgae C-1509 Nannochloris sp. Naumann. BIOTECHNOLOGY REPORTS (AMSTERDAM, NETHERLANDS) 2023; 40:e00818. [PMID: 38020727 PMCID: PMC10656214 DOI: 10.1016/j.btre.2023.e00818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Revised: 10/06/2023] [Accepted: 10/27/2023] [Indexed: 12/01/2023]
Abstract
Biologically active compounds, including polysaccharides isolated from microalgae, have various properties. Although Nannochloropsis spp. have the potential to produce secondary metabolites important for biotechnology, only a small part of the research on these microalgae has focused on their ability to produce polysaccharide fractions. This study aims to evaluate the physicochemical growth factors of Nannochloropsis spp. microalgae, which ensure the maximum accumulation of polysaccharides, as well as to optimize the parameters of polysaccharide extraction. The optimal nutrient medium composition was selected to maximize biomass and polysaccharide accumulation. The significance of selecting the extraction module and extraction temperature regime, as well as the cultivation conditions (temperature and active acidity value) is emphasized. Important chemical components of polysaccharides responsible for their biological activity were identified.
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Affiliation(s)
- Olga Babich
- Research and Education Center, Industrial Biotechnologies, Immanuel Kant BFU, A. Nevsky Street, 14, Kaliningrad, Russia
| | - Svetlana Ivanova
- Natural Nutraceutical Biotesting Laboratory, Kemerovo State University, Krasnaya Street 6, Kemerovo 650043, Russia
- Department of TNSMD Theory and Methods, Kemerovo State University, Krasnaya Street, 6, Kemerovo 650043, Russia
| | - Aleksandr Tupitsyn
- Laboratory of Carbon Nanomaterials, R&D Department, Kemerovo State University, Krasnaya Street, 6, Kemerovo 650043, Russia
| | - Aleksandr Vladimirov
- P.A. Chikhachev House of Scientific Collaboration, Kemerovo State University, Krasnaya Street, 6, Kemerovo 650043, Russia
| | - Elena Nikolaeva
- P.A. Chikhachev House of Scientific Collaboration, Kemerovo State University, Krasnaya Street, 6, Kemerovo 650043, Russia
| | - Archana Tiwari
- Diatom Research Laboratory, Amity Institute of Biotechnology, Amity University, Noida 201301, India
| | - Ekaterina Budenkova
- Research and Education Center, Industrial Biotechnologies, Immanuel Kant BFU, A. Nevsky Street, 14, Kaliningrad, Russia
| | - Egor Kashirskikh
- Research and Education Center, Industrial Biotechnologies, Immanuel Kant BFU, A. Nevsky Street, 14, Kaliningrad, Russia
| | - Veronika Anokhova
- Research and Education Center, Industrial Biotechnologies, Immanuel Kant BFU, A. Nevsky Street, 14, Kaliningrad, Russia
| | - Philippe Michaud
- Institut Pascal, Université Clermont Auvergne, CNRS, Clermont Auvergne INP, Clermont-Ferrand F-63000, France
| | - Stanislav Sukhikh
- Research and Education Center, Industrial Biotechnologies, Immanuel Kant BFU, A. Nevsky Street, 14, Kaliningrad, Russia
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Belachqer-El Attar S, Morillas-España A, Sánchez-Zurano A, Pessôa LC, Pinna-Hernández MG, de Jesus Assis D, López JLC, Acién G. Influence of culture media composition on the rheology of microalgae concentrates on a large scale. N Biotechnol 2023; 77:90-99. [PMID: 37532220 DOI: 10.1016/j.nbt.2023.07.005] [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: 06/10/2023] [Revised: 07/16/2023] [Accepted: 07/30/2023] [Indexed: 08/04/2023]
Abstract
The role of microalgae in the production of bioproducts and biofuels, along with their ability to provide a sustainable pathway for wastewater treatment, makes them promising alternatives to conventional processes. Nevertheless, large-scale downstream processing requires an understanding of biomass rheology that needs to be addressed further. This study aimed to characterize microalgal concentrates rheologically in different culture media. The presence of bacteria was quantified by photorespirometry and plate counting techniques. The culture medium was found to significantly influence viscosity, with primary wastewater exhibiting the highest viscosity and seawater plus pig slurry the lowest. The concentration of heterotrophic bacteria was directly related to the viscosity. Extracellular polysaccharides (EPS) in supernatant exhibited an inverse viscosity trend compared to biomass concentrates, with pig slurry cultures having higher concentrations. These findings emphasize the profound influence of culture medium and EPS on the rheology of microalgal biomass, underscoring the need for continued research aimed at facilitating and optimizing large-scale downstream processes within the framework of a circular economy and the attainment of the Sustainable Development Goals (6,8, and 12).
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Affiliation(s)
- Solaima Belachqer-El Attar
- Department of Chemical Engineering, University of Almería, 04120 Almería, Spain; Solar Energy Research Centre (CIESOL), 04120 Almería, Spain.
| | - Ainoa Morillas-España
- Department of Chemical Engineering, University of Almería, 04120 Almería, Spain; Solar Energy Research Centre (CIESOL), 04120 Almería, Spain
| | - Ana Sánchez-Zurano
- Department of Chemical Engineering, University of Almería, 04120 Almería, Spain; Solar Energy Research Centre (CIESOL), 04120 Almería, Spain
| | - Luiggi Cavalcanti Pessôa
- Graduate Program in Chemical Engineering (PPEQ), Polytechnic School, Federal University of Bahia, Salvador, Brazil; Senai Cimatec University Center, Environment Department, Salvador, Brazil
| | - María Guadalupe Pinna-Hernández
- Department of Chemical Engineering, University of Almería, 04120 Almería, Spain; Solar Energy Research Centre (CIESOL), 04120 Almería, Spain
| | - Denilson de Jesus Assis
- Graduate Program in Chemical Engineering (PPEQ), Polytechnic School, Federal University of Bahia, Salvador, Brazil; School of Exact and Technological Sciences, University Salvador, Salvador, Bahia, Brazil
| | - José Luis Casas López
- Department of Chemical Engineering, University of Almería, 04120 Almería, Spain; Solar Energy Research Centre (CIESOL), 04120 Almería, Spain
| | - Gabriel Acién
- Department of Chemical Engineering, University of Almería, 04120 Almería, Spain; Solar Energy Research Centre (CIESOL), 04120 Almería, Spain
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12
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Saad MH, Sidkey NM, El-Fakharany EM. Identification and statistical optimization of a novel alginate polymer extracted from newly isolated Synechocystis algini MNE ON864447 with antibacterial activity. Microb Cell Fact 2023; 22:229. [PMID: 37932753 PMCID: PMC10629183 DOI: 10.1186/s12934-023-02240-w] [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: 09/09/2023] [Accepted: 10/28/2023] [Indexed: 11/08/2023] Open
Abstract
Cyanobacteria are a potential source of promising secondary metabolites with different biological activities, including antibacterial, antiviral, antifungal, antiprotozoal, and anticancer activities. To combat the emergence of antibiotic resistance, there is an urgent requirement for new drugs, and cyanobacteria metabolites can constitute alternative new antibacterial medication. The chemical complexity of their exopolysaccharides indicates that they have the potential to be bioactive molecules with many biological activities. The present study aimed to produce and optimise a novel alginate polymer from a newly isolated cyanobacterium, S. algini MNE ON864447, in addition to its promising antibacterial activity. We successfully isolated a new cyanobacterium strain, S. algini MNE ON864447 from the Nile River, which produces alginate as an extracellular polymeric substance. The isolated cyanobacterial alginate was identified using a set of tests, including FTIR, TLC, HPLC, GC-MS, and 1H NMR. Plackett-Burman statistical design showed that working volume (X1), the incubation period (X2), and inoculum size (X3) are the most significant variables affecting the production of alginate. The highest alginate production (3.57 g/L) was obtained using 4% inoculum size in 400 mL medium/L conical flask after 20 days of the incubation period. The extracted alginate showed potent antibacterial activity against both Gram-negative and Gram-positive bacteria and Streptococcus mutants (NCTC10449) are the most sensitive tested pathogen for purified cyanobacterial alginate with inhibition zone diameters of 34 ± 0.1 mm at 10 mg/mL of purified alginate while Vibro cholera (NCTC 8021) the lowest sensitive one and showed inhibition zone diameters of 22.5 ± 0.05 mm at the same cyanobacterial alginate concentration. This antibacterial activity is a critical step in the development of antibacterial drugs and presents a new challenge to fight against multi-resistant bacteria.
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Affiliation(s)
- Mabroka H Saad
- Protein Research Department, Genetic Engineering and Biotechnology Research Institute (GEBRI), City of Scientific Research andTechnological Applications (SRTA-City), New Borg AL Arab, Alexandria, Egypt
- Botany & Microbiology Department, Faculty of Science, Al-Azhar University (Girls Branch), Cairo, Egypt
| | - Nagwa M Sidkey
- Botany & Microbiology Department, Faculty of Science, Al-Azhar University (Girls Branch), Cairo, Egypt
| | - Esmail M El-Fakharany
- Protein Research Department, Genetic Engineering and Biotechnology Research Institute (GEBRI), City of Scientific Research andTechnological Applications (SRTA-City), New Borg AL Arab, Alexandria, Egypt.
- Pharmaceutical and Fermentation Industries Development Centre (PFIDC), City of Scientific Research and Technological Applications (SRTA-City), New Borg Al-Arab, Alexandria, Egypt.
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13
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Concórdio-Reis P, David H, Reis MAM, Amorim A, Freitas F. Bioprospecting for new exopolysaccharide-producing microalgae of marine origin. Int Microbiol 2023; 26:1123-1130. [PMID: 37140807 DOI: 10.1007/s10123-023-00367-9] [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: 02/28/2023] [Revised: 04/22/2023] [Accepted: 04/26/2023] [Indexed: 05/05/2023]
Abstract
Microalgae are photosynthetic organisms that can produce biomolecules with industrial interest, including exopolysaccharides (EPS). Due to their structural and compositional diversity, microalgae EPS present interesting properties that can be considered in cosmetic and/or therapeutic areas. Seven microalgae strains from three different lineages, namely Dinophyceae (phylum Miozoa), Haptophyta, and Chlorophyta, were investigated as EPS producers. All strains were found to be EPS producers, though the highest EPS yield was obtained for Tisochrysis lutea, followed by Heterocapsa sp. (126.8 and 75.8 mg L-1, respectively). Upon assessment of the polymers' chemical composition, significant contents of unusual sugars, including fucose, rhamnose, and ribose, were found. Heterocapsa sp. EPS stood out due to its high content of fucose (40.9 mol%), a sugar known to confer biological properties to polysaccharides. The presence of sulfate groups (10.6-33.5 wt%) was also noticed in the EPS produced by all microalgae strains, thus contributing to the possibility that these EPS might have biological activities worth exploring.
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Affiliation(s)
- Patrícia Concórdio-Reis
- Associate Laboratory i4HB - Institute for Health and Bioeconomy, School of Science and Technology, NOVA University Lisbon, Caparica, Portugal
- UCIBIO - Applied Molecular Biosciences Unit, Department of Chemistry, Faculty of Sciences and Technology, School of Science and Technology, NOVA University Lisbon, Caparica, Portugal
| | - Helena David
- MARE - Marine and Environmental Sciences Centre & ARNET - Aquatic Research Network, Faculdade de Ciências, Universidade de Lisboa, Lisboa, Portugal
| | - Maria A M Reis
- Associate Laboratory i4HB - Institute for Health and Bioeconomy, School of Science and Technology, NOVA University Lisbon, Caparica, Portugal
- UCIBIO - Applied Molecular Biosciences Unit, Department of Chemistry, Faculty of Sciences and Technology, School of Science and Technology, NOVA University Lisbon, Caparica, Portugal
| | - Ana Amorim
- MARE - Marine and Environmental Sciences Centre & ARNET - Aquatic Research Network, Faculdade de Ciências, Universidade de Lisboa, Lisboa, Portugal
| | - Filomena Freitas
- Associate Laboratory i4HB - Institute for Health and Bioeconomy, School of Science and Technology, NOVA University Lisbon, Caparica, Portugal.
- UCIBIO - Applied Molecular Biosciences Unit, Department of Chemistry, Faculty of Sciences and Technology, School of Science and Technology, NOVA University Lisbon, Caparica, Portugal.
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14
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Moreno-Andrés J, Romero-Martínez L, Seoane S, Acevedo-Merino A, Moreno-Garrido I, Nebot E. Evaluation of algaecide effectiveness of five different oxidants applied on harmful phytoplankton. JOURNAL OF HAZARDOUS MATERIALS 2023; 452:131279. [PMID: 36989795 DOI: 10.1016/j.jhazmat.2023.131279] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2022] [Revised: 03/13/2023] [Accepted: 03/22/2023] [Indexed: 05/03/2023]
Abstract
Harmful algal blooms (HABs) in coastal areas similarly impact both ecosystems and human health. The translocation of phytoplankton species via maritime transport can potentially promote the growth of HABs in coastal systems. Accordingly, ballast water must be disinfected. The main goal of this study is to assess the effectiveness of different emerging biocides, including H2O2, peracetic acid (PAA), peroxymonosulfate (PMS), and peroxydisulfate (PDS). The effectiveness of these biocides is compared with that of conventional chlorination methods. Their effects on two ichthyotoxic microalgae with worldwide distribution, i.e., Prymnesium parvum and Heterosigma akashiwo, are examined. To ensure the prolonged effectiveness of the different reagents, their concentration-response curves for 14 days are constructed and examined. The results suggest a strong but shorter effect by PMS (EC50 = 0.40-1.99 mg·L-1) and PAA (EC50 = 0.32-2.70 mg·L-1), a maintained effect by H2O2 (EC50 = 6.67-7.08 mg·L-1), and a negligible effect by PDS. H. akashiwo indicates higher resistance than P. parvum, except when H2O2 is used. Based on the growth inhibition performance and consumption of the reagents as well as a review of important aspects regarding their application, using H2O2, PAA, or PMS can be a feasible alternative to chlorine-based reagents for inhibiting the growth of harmful phytoplankton.
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Affiliation(s)
- Javier Moreno-Andrés
- Department of Environmental Technologies, Faculty of Marine and Environmental Sciences, INMAR - Marine Research Institute, CEIMAR - International Campus of Excellence of the Sea, University of Cadiz, Spain.
| | - Leonardo Romero-Martínez
- Department of Environmental Technologies, Faculty of Marine and Environmental Sciences, INMAR - Marine Research Institute, CEIMAR - International Campus of Excellence of the Sea, University of Cadiz, Spain
| | - Sergio Seoane
- Department of Plant Biology and Ecology, Faculty of Science and Technology, University of the Basque Country UPV/EHU, Leioa 48940, Spain; Research Centre for Experimental Marine Biology and Biotechnology (Plentzia Marine Station, PiE, UPV/EHU), Plentzia 48620, Spain
| | - Asunción Acevedo-Merino
- Department of Environmental Technologies, Faculty of Marine and Environmental Sciences, INMAR - Marine Research Institute, CEIMAR - International Campus of Excellence of the Sea, University of Cadiz, Spain
| | - Ignacio Moreno-Garrido
- Institute of Marine Sciences of Andalusia (CSIC), Campus Río San Pedro, s/n, 11510 Puerto Real, Cádiz, Spain
| | - Enrique Nebot
- Department of Environmental Technologies, Faculty of Marine and Environmental Sciences, INMAR - Marine Research Institute, CEIMAR - International Campus of Excellence of the Sea, University of Cadiz, Spain
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15
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Polat E, Yavuztürk-Gül B, Ünver H, Altınbaş M. Biotechnological product potential of Auxenochlorella protothecoides including biologically active compounds (BACs) under nitrogen stress conditions. World J Microbiol Biotechnol 2023; 39:198. [PMID: 37188850 DOI: 10.1007/s11274-023-03642-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Accepted: 05/05/2023] [Indexed: 05/17/2023]
Abstract
Nitrogen stress can influence microalgae's growth characteristics, and microalgae grown in nitrogen-deficient conditions may produce higher or lower levels of biotechnological products as a result of metabolic changes. In photoautotrophic and heterotrophic cultures, nitrogen limitation has been proven effective in promoting lipid accumulation. In spite of this, no study has demonstrated a significant correlation between lipid content and other biotechnological products such as bioactive compounds (BACs). This research examines a strategy for lipid accumulation as well as the potential production of BACs with antibacterial properties in parallel with that strategy. This concept involved the treatment of the microalga Auxenochlorella protothecoides with low and high concentrations of ammonium (NH4+). This particular experiment reached a maximum lipid content of 59.5% using a 0.8 mM NH4+ concentration, resulting in the yellowing of the chlorophyll levels. Agar diffusion assays were conducted to determine the antibacterial activity of different extracts derived from the biomass when stressed with different levels of nitrogen. Algal extracts prepared by a variety of solvents showed different levels of antibacterial activity against representative strains of both gram-negative (Escherichia coli) and gram-positive (Staphylococcus aureus) bacteria. Among the extracts tested, 500 mg/L ethyl acetate extract had the greatest antibacterial activity against Escherichia coli. In order to identify the components responsible for the extract's antibacterial activity, fatty acid methyl ester (FAME) analysis was performed. It has been suggested that the lipid fraction may be a valuable indicator of these activities since some lipid components are known to possess antimicrobial properties. In this regard, it was found that the amount of polyunsaturated fatty acid (PUFA) significantly decreased by 53.4% under the conditions with the highest antibacterial activity observed.
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Affiliation(s)
- Ece Polat
- Department of Environmental Engineering, Istanbul Technical University, 34469, Maslak, Istanbul, Türkiye.
- Department of Environmental Engineering, Faculty of Engineering and Architecture, Sinop University, 57000, Sinop, Türkiye.
| | - Bahar Yavuztürk-Gül
- Department of Environmental Engineering, Istanbul Technical University, 34469, Maslak, Istanbul, Türkiye
- Dincer Topacık National Research Center on Membrane Technologies (MEM-TEK), Istanbul, Türkiye
| | - Hülya Ünver
- Department of Environmental Engineering, Istanbul Technical University, 34469, Maslak, Istanbul, Türkiye
| | - Mahmut Altınbaş
- Department of Environmental Engineering, Istanbul Technical University, 34469, Maslak, Istanbul, Türkiye
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16
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Moia IC, Pereira SB, Domizio P, De Philippis R, Adessi A. Phormidium ambiguum and Leptolyngbya ohadii Exopolysaccharides under Low Water Availability. Polymers (Basel) 2023; 15:polym15081889. [PMID: 37112036 PMCID: PMC10142279 DOI: 10.3390/polym15081889] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Revised: 03/31/2023] [Accepted: 04/12/2023] [Indexed: 04/29/2023] Open
Abstract
Cyanobacteria can cope with various environmental stressors, due to the excretion of exopolysaccharides (EPS). However, little is known about how the composition of these polymers may change according to water availability. This work aimed at characterizing the EPS of Phormidium ambiguum (Oscillatoriales; Oscillatoriaceae) and Leptolyngbya ohadii (Pseudanabaenales; Leptolyngbyaceae), when grown as biocrusts and biofilms, subject to water deprivation. The following EPS fractions were quantified and characterized: soluble (loosely bound, LB) and condensed (tightly bound, TB) for biocrusts, released (RPS), and sheathed in P. ambiguum and glycocalyx (G-EPS) in L. ohadii for biofilms. For both cyanobacteria upon water deprivation, glucose was the main monosaccharide present and the amount of TB-EPS resulted was significantly higher, confirming its importance in these soil-based formations. Different profiles of monosaccharides composing the EPSs were observed, as for example the higher concentration of deoxysugars observed in biocrusts compared to biofilms, demonstrating the plasticity of the cells to modify EPS composition as a response to different stresses. For both cyanobacteria, both in biofilms and biocrusts, water deprivation induced the production of simpler carbohydrates, with an increased dominance index of the composing monosaccharides. The results obtained are useful in understanding how these very relevant cyanobacterial species are sensitively modifying the EPS secreted when subject to water deprivation and could lead to consider them as suitable inoculants in degraded soils.
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Affiliation(s)
- Isabela C Moia
- DAGRI-Department of Agriculture, Food, Environment and Forestry, University of Florence, Via Maragliano 77, 50144 Firenze, Italy
| | - Sara B Pereira
- i3S-Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen, 208, 4200-135 Porto, Portugal
- IBMC-Instituto de Biologia Celular e Molecular, Universidade do Porto, Rua Alfredo Allen, 208, 4200-135 Porto, Portugal
| | - Paola Domizio
- DAGRI-Department of Agriculture, Food, Environment and Forestry, University of Florence, Via Maragliano 77, 50144 Firenze, Italy
| | - Roberto De Philippis
- DAGRI-Department of Agriculture, Food, Environment and Forestry, University of Florence, Via Maragliano 77, 50144 Firenze, Italy
| | - Alessandra Adessi
- DAGRI-Department of Agriculture, Food, Environment and Forestry, University of Florence, Via Maragliano 77, 50144 Firenze, Italy
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17
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Pencik O, Molnarova K, Durdakova M, Kolackova M, Klofac D, Kucsera A, Capal P, Svec P, Bytesnikova Z, Richtera L, Brtnický M, Adam V, Huska D. Not so dangerous? PET microplastics toxicity on freshwater microalgae and cyanobacteria. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 329:121628. [PMID: 37059171 DOI: 10.1016/j.envpol.2023.121628] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Revised: 03/26/2023] [Accepted: 04/11/2023] [Indexed: 05/06/2023]
Abstract
Microalgae and cyanobacteria are among the most important primary producers and are responsible for the production of 50-80% of the oxygen on Earth. They can be significantly affected by plastic pollution, as the vast majority of plastic waste ends up in rivers and then the oceans. This research focuses on green microalgae Chlorella vulgaris (C. vulgaris), Chlamydomonas reinhardtii (C. reinhardtii), filamentous cyanobacterium Limnospira (Arthrospira) maxima (L.(A.) maxima) and how they are affected by environmentally relevant PET-MPs (polyethylene-terephtalate microplastics). Manufactured PET-MPs have asymmetric shape, size between 3 and 7 μm and were used in concentrations ranging from 5 mg/L to 80 mg/L. The highest inhibitory rate of growth was found in C. reinhardtii (-24%). Concentration-dependent changes in chlorophyll a composition were found in C. vulgaris and C. reinhardtii, not in L. (A.) maxima. Furthermore, cell damage was detected in all three organisms by CRYO-SEM (shriveling, cell wall disruption), but the cyanobacterium was the least damaged. A PET-fingerprint was detected on the surface of all tested organisms using FTIR, indicating the adherence of PET-MPs. The highest rate of PET-MPs adsorption was detected in L. (A.) maxima. Specifically, characteristic spectra were observed at ∼721, 850, 1100, 1275, 1342, and 1715 cm-1 which are specific for functional groups of PET-MPs. Nitrogen and carbon content significantly increased in L. (A.) maxima under exposure to 80 mg/L due to the PET-MPs adherence and mechanical stress. In all three tested organisms, weak exposure-related ROS generation was detected. In general, cyanobacteria seem to be more resistant to the effects of MPs. However, organisms in the aquatic environment are exposed to MPs over a longer time scale, so it is important to use the present findings for further longer-term experiments on environmentally relevant organisms.
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Affiliation(s)
- Ondrej Pencik
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, 613 00, Brno, Czech Republic
| | - Katarina Molnarova
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, 613 00, Brno, Czech Republic
| | - Michaela Durdakova
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, 613 00, Brno, Czech Republic
| | - Martina Kolackova
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, 613 00, Brno, Czech Republic
| | - Daniel Klofac
- Department of Agrochemistry, Soil Science, Microbiology and Plant Nutrition, Mendel University in Brno, Zemedelska 1, 613 00, Brno, Czech Republic
| | - Attilla Kucsera
- Department of Molecular Biology and Radiobiology, Mendel University in Brno, Zemedelska 1, 613 00, Brno, Czech Republic
| | - Petr Capal
- Institute of Experimental Botany, Centre of the Region Hana for Biotechnological and Agricultural Research, Slechtitelu 241/27, 783 71, Olomouc, Czech Republic
| | - Pavel Svec
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, 613 00, Brno, Czech Republic
| | - Zuzana Bytesnikova
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, 613 00, Brno, Czech Republic
| | - Lukas Richtera
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, 613 00, Brno, Czech Republic
| | - Martin Brtnický
- Department of Agrochemistry, Soil Science, Microbiology and Plant Nutrition, Mendel University in Brno, Zemedelska 1, 613 00, Brno, Czech Republic
| | - Vojtech Adam
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, 613 00, Brno, Czech Republic
| | - Dalibor Huska
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, 613 00, Brno, Czech Republic.
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18
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Feng J, Li J, Liu D, Xin Y, Sun J, Yin WB, Li T. Generation and comprehensive analysis of Synechococcus elongatus-Aspergillus nidulans co-culture system for polyketide production. BIOTECHNOLOGY FOR BIOFUELS AND BIOPRODUCTS 2023; 16:32. [PMID: 36859469 PMCID: PMC9979520 DOI: 10.1186/s13068-023-02283-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Accepted: 02/16/2023] [Indexed: 03/03/2023]
Abstract
BACKGROUND Artificial microbial consortia composed of heterotrophic and photoautotrophic organisms represent a unique strategy for converting light energy and carbon dioxide into high-value bioproducts. Currently, the types of desired bioproducts are still limited, and microbial fitness benefit rendered by paired partner generally needs to be intensified. Exploring novel artificial microbial consortia at a laboratory scale is an essential step towards addressing this unmet need. This study aimed to conduct and analyze an artificial consortium composed of cyanobacterium Synechococcus elongatus FL130 with the filamentous fungus Aspergillus nidulans TWY1.1 for producing fungi-derived secondary metabolite of polyketide neosartoricin B. RESULTS Polyketide-producing A. nidulans TWY1.1 substantially ameliorated the growth and the survival of sucrose-secreting cyanobacterium S. elongatus FL130 in salt-stressed environments. Besides sucrose, comparable amounts of other carbohydrates were released from axenically cultured FL130 cells, which could be efficiently consumed by TWY1.1. Relative to axenically cultured FL130, less glycogen was accumulated in FL130 cells co-cultured with TWY1.1, and the glycogen phosphorylase gene catalyzing the first step for glycogen degradation had two-fold expression. Different from axenically cultured filamentous fungi, abundant vacuoles were observed in fungal hyphae of TWY1.1 co-cultured with cyanobacterium FL130. Meanwhile, FL130 cells displayed a characteristic pattern of interacting with its heterotrophic partner, densely dispersing along certain hyphae of TWY1.1. Finally, polyketide neosartoricin B was produced from TWY1.1 in FL130-TWY1.1 co-cultures, which was tightly adjusted by nitrogen level. CONCLUSION Overall, the results thoroughly proved the concept of pairing cyanobacteria with filamentous fungi to build artificial consortia for producing fungi-derived biomolecules.
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Affiliation(s)
- Jie Feng
- grid.32566.340000 0000 8571 0482School of Basic Medical Sciences, Lanzhou University, Lanzhou, 730000 China
| | - Jingwei Li
- grid.32566.340000 0000 8571 0482School of Basic Medical Sciences, Lanzhou University, Lanzhou, 730000 China
| | - Dongxia Liu
- grid.32566.340000 0000 8571 0482School of Basic Medical Sciences, Lanzhou University, Lanzhou, 730000 China
| | - Yuxian Xin
- grid.32566.340000 0000 8571 0482School of Basic Medical Sciences, Lanzhou University, Lanzhou, 730000 China
| | - Jingrong Sun
- grid.32566.340000 0000 8571 0482School of Basic Medical Sciences, Lanzhou University, Lanzhou, 730000 China
| | - Wen-Bing Yin
- grid.9227.e0000000119573309State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101 People’s Republic of China
| | - Tingting Li
- School of Basic Medical Sciences, Lanzhou University, Lanzhou, 730000, China.
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Laboratory- and Pilot-Scale Cultivation of Tetraselmis striata to Produce Valuable Metabolic Compounds. Life (Basel) 2023; 13:life13020480. [PMID: 36836837 PMCID: PMC9962084 DOI: 10.3390/life13020480] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Revised: 02/01/2023] [Accepted: 02/07/2023] [Indexed: 02/11/2023] Open
Abstract
Marine microalgae are considered an important feedstock of multiple valuable metabolic compounds of high biotechnological potential. In this work, the marine microalga Tetraselmis striata was cultivated in different scaled photobioreactors (PBRs). Initially, experiments were performed using two different growth substrates (a modified F/2 and the commercial fertilizer Nutri-Leaf (30% TN-10% P-10% K)) to identify the most efficient and low-cost growth medium. These experiments took place in 4 L glass aquariums at the laboratory scale and in a 9 L vertical tubular pilot column. Enhanced biomass productivities (up to 83.2 mg L-1 d-1) and improved biomass composition (up to 41.8% d.w. proteins, 18.7% d.w. carbohydrates, 25.7% d.w. lipids and 4.2% d.w. total chlorophylls) were found when the fertilizer was used. Pilot-scale experiments were then performed using Nutri-Leaf as a growth medium in different PBRs: (a) a paddle wheel, open, raceway pond of 40 L, and (b) a disposable polyethylene (plastic) bag of 280 L working volume. Biomass growth and composition were also monitored at the pilot scale, showing that high-quality biomass can be produced, with important lipids (up to 27.6% d.w.), protein (up to 45.3% d.w.), carbohydrate (up to 15.5% d.w.) and pigment contents (up to 4.2% d.w. total chlorophylls), and high percentages of eicosapentaenoic acid (EPA). The research revealed that the strain successfully escalated in larger volumes and the biochemical composition of its biomass presents high commercial interest and could potentially be used as a feed ingredient.
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20
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Study of the Polysaccharide Production by the Microalga Vischeria punctata in Relation to Cultivation Conditions. Life (Basel) 2022; 12:life12101614. [PMID: 36295049 PMCID: PMC9604657 DOI: 10.3390/life12101614] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 10/09/2022] [Accepted: 10/13/2022] [Indexed: 11/07/2022] Open
Abstract
Vischeria punctata is a unicellular microalga that has industrial potential, as it can produce substances with beneficial properties. Among them, endopolysaccharides (accumulated in cells) and exopolysaccharides (released by cells into the culture medium) are of particular interest. This study aimed to investigate the effect of nutrient medium composition on the growth of V. punctata biomass and the synthesis of polysaccharides by microalgae. The effect of modifying a standard nutrient medium and varying cultivation parameters (temperature, time, and extractant type) on the yield of exopolysaccharides produced by the microalgae V. punctate was investigated. The methods of spectrophotometry, ultrasonic extraction, and alcohol precipitation were used in the study. It was found that after 61 days of cultivation, the concentration of polysaccharides in the culture medium was statistically significantly higher (p <0.05) when using a Prat nutrient medium (984.9 mg/g d.w.) than BBM 3N (63.0 mg/g d.w.). It was found that the increase in the V. punctata biomass when cultivated on different nutrient media did not differ significantly. The maximum biomass values on Prat and BBM 3N media were 1.101 mg/g d.w. and 1.120 mg/g d.w., respectively. Neutral sugars and uronic acids were found in the culture media. It follows on from the obtained data that the modified PratM medium was more efficient for extracting polysaccharides from V. punctata. The potential of microalgae as new sources of valuable chemicals (polysaccharides), which can be widely used in technologies for developing novel functional foods, biologically active food supplements, and pharmaceutical substances, was studied.
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21
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Qu Y, Chen X, Ma B, Zhu H, Zheng X, Yu J, Wu Q, Li R, Wang Z, Xiao Y. Extracellular Metabolites of Heterotrophic Auxenochlorella protothecoides: A New Source of Bio-Stimulants for Higher Plants. Mar Drugs 2022; 20:md20090569. [PMID: 36135758 PMCID: PMC9505405 DOI: 10.3390/md20090569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Revised: 08/30/2022] [Accepted: 09/02/2022] [Indexed: 11/17/2022] Open
Abstract
The biodiversity of microalgal species is enormous, and their versatile metabolism produces a wide diversity of compounds that can be used in food, healthcare, and other applications. Microalgae are also a potential source of bio-stimulants that enhance nutrition efficiency, abiotic stress tolerance, and/or crop quality traits. In this study, the extracellular metabolites of Auxenochlorella protothecoides (EAp) were prepared using three different culture strategies, and their effects on plant growth were examined. Furthermore, the composition of EAp was analyzed by GC-MS. The elongation of lateral roots and the cold-tolerance of Arabidopsis thaliana and Nicotiana benthamiana were promoted by EAp. Moreover, EAp from high-cell-density fermentation stimulated the growth of the leafy vegetables Brassica rapa and Lactuca sativa at dilutions as high as 500- and 1000-fold. Three major groups of compounds were identified by GC-MS, including organic acids or organic acid esters, phenols, and saccharides. Some of these compounds have known plant–stimulating effects, while the rest requires further investigation in the future. Our study demonstrates that EAp is a potential bio-stimulant, while also providing an environmentally friendly and economical microalgae fermentation process.
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Affiliation(s)
- Yujiao Qu
- Protoga Biotechnology Co., Ltd., Zhuhai 519000, China
- Microalgae Biosynthesis R&D Center, Research Institute of Tsinghua University in Shenzhen, Shenzhen 518057, China
| | - Xinxiang Chen
- Sinochem Fertilizer Co., Ltd., Beijing 100069, China
| | - Beibei Ma
- Protoga Biotechnology Co., Ltd., Zhuhai 519000, China
| | - Huachang Zhu
- Protoga Biotechnology Co., Ltd., Zhuhai 519000, China
| | - Xuan Zheng
- Sinochem Fertilizer Co., Ltd., Beijing 100069, China
| | - Jiazhen Yu
- Protoga Biotechnology Co., Ltd., Zhuhai 519000, China
| | - Qinghui Wu
- Sinochem Fertilizer Co., Ltd., Beijing 100069, China
| | - Rong Li
- Sinochem Fertilizer Co., Ltd., Beijing 100069, China
| | - Ziqiang Wang
- Sinochem Fertilizer Co., Ltd., Beijing 100069, China
- Correspondence: (Z.W.); (Y.X.)
| | - Yibo Xiao
- Protoga Biotechnology Co., Ltd., Zhuhai 519000, China
- Microalgae Biosynthesis R&D Center, Research Institute of Tsinghua University in Shenzhen, Shenzhen 518057, China
- Correspondence: (Z.W.); (Y.X.)
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22
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Update on the application of magnetic fields to microalgal cultures. World J Microbiol Biotechnol 2022; 38:211. [PMID: 36053367 DOI: 10.1007/s11274-022-03398-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Accepted: 08/21/2022] [Indexed: 12/14/2022]
Abstract
Several studies have shown that any magnetic field (MF) applied to microalgae modifies its cultivation conditions and may favor biomolecule production since it interacts with the microorganisms and affect their growth. As a result, there are changes in concentrations and compositions of biomass and biomolecules. This review aims at updating MF applications to microalga cultures that were reported by studies conducted in the last 5 years. It shows the main studies that reached positive results of carbohydrate, lipid, protein and pigment production. Effects of MFs may be positive, negative or null, depending on some factors, such as intensity, exposure time, physiological state of cells and application devices. Therefore, this review details cultivation conditions used for reaching high concentration of biomolecules, explains the action of MFs on microalgae and describes their applicability to the biorefinery concept.
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23
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Qi M, Zheng C, Wu W, Yu G, Wang P. Exopolysaccharides from Marine Microbes: Source, Structure and Application. Mar Drugs 2022; 20:md20080512. [PMID: 36005515 PMCID: PMC9409974 DOI: 10.3390/md20080512] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Revised: 08/10/2022] [Accepted: 08/11/2022] [Indexed: 12/03/2022] Open
Abstract
The unique living environment of marine microorganisms endows them with the potential to produce novel chemical compounds with various biological activities. Among them, the exopolysaccharides produced by marine microbes are an important factor for them to survive in these extreme environments. Up to now, exopolysaccharides from marine microbes, especially from extremophiles, have attracted more and more attention due to their structural complexity, biodegradability, biological activities, and biocompatibility. With the development of culture and separation methods, an increasing number of novel exopolysaccharides are being found and investigated. Here, the source, structure and biological activities of exopolysaccharides, as well as their potential applications in environmental restoration fields of the last decade are summarized, indicating the commercial potential of these versatile EPS in different areas, such as food, cosmetic, and biomedical industries, and also in environmental remediation.
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Affiliation(s)
- Mingxing Qi
- College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China
| | - Caijuan Zheng
- Key Laboratory of Tropical Medicinal Resource Chemistry of Ministry of Education, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou 571158, China
- Key Laboratory of Tropical Medicinal Plant Chemistry of Hainan Province, Haikou 571158, China
| | - Wenhui Wu
- College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China
- Correspondence: (W.W.); (G.Y.); (P.W.); Tel.: +86-021-61900388 (W.W.); +86-0532-8203-1609 (G.Y.); +86-021-61900388 (P.W.)
| | - Guangli Yu
- Key Laboratory of Marine Drugs, Ministry of Education, Shandong Provincial Key Laboratory of Glycoscience and Glycoengineering, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266237, China
- Laboratory for Marine Drugs and Bioproducts of Qingdao Pilot National Laboratory for Marine Science and Technology, Qingdao 266237, China
- Correspondence: (W.W.); (G.Y.); (P.W.); Tel.: +86-021-61900388 (W.W.); +86-0532-8203-1609 (G.Y.); +86-021-61900388 (P.W.)
| | - Peipei Wang
- College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China
- Correspondence: (W.W.); (G.Y.); (P.W.); Tel.: +86-021-61900388 (W.W.); +86-0532-8203-1609 (G.Y.); +86-021-61900388 (P.W.)
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24
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Microalgae-derived polysaccharides: Potential building blocks for biomedical applications. World J Microbiol Biotechnol 2022; 38:150. [PMID: 35776270 DOI: 10.1007/s11274-022-03342-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Accepted: 06/20/2022] [Indexed: 10/17/2022]
Abstract
In recent years, the increasing concern about human health well-being has strongly boosted the search for natural alternatives that can be used in different fields, especially in biomedicine. This has put microalgae-based products in evidence since they contain many bioactive compounds, of which polysaccharides are attractive due to the diverse physicochemical properties and new or improved biological roles they play. Polysaccharides from microalgae, specially exopolysaccharides, are critically important for market purposes because they can be used as anti-inflammatory, immunomodulatory, anti-glycemic, antitumor, antioxidant, anticoagulant, antilipidemic, antiviral, antibacterial, and antifungal agents. Therefore, to obtain higher productivity and competitiveness of these naturally available compounds, the cultivation parameters and the extraction/purification processes must be better optimized in order to bring perspectives for the exploitation of products in commercial and clinical practice. In this sense, the objective of the present review is to elucidate the potential biomedical applications of microalgae-derived polysaccharides. A closer look is taken at the main polysaccharides produced by microalgae, methods of extraction, purification and structural determination, biological activities and their applications, and current status.
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25
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Prospective on the application of abiotic stresses to enhance the industrial production of exopolysaccharides from microalgae. CURRENT RESEARCH IN BIOTECHNOLOGY 2022. [DOI: 10.1016/j.crbiot.2022.09.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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