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Şirin PA, Serdar S. Effects of nitrogen starvation on growth and biochemical composition of some microalgae species. Folia Microbiol (Praha) 2024:10.1007/s12223-024-01136-5. [PMID: 38285280 DOI: 10.1007/s12223-024-01136-5] [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: 05/08/2023] [Accepted: 01/12/2024] [Indexed: 01/30/2024]
Abstract
Nitrogen is one of the most important nutrient sources for the growth of microalgae. We studied the effects of nitrogen starvation on the growth responses, biochemical composition, and fatty acid profile of Dunaliella tertiolecta, Phaeodactylum tricornutum, and Nannochloropsis oculata. The lack of nitrogen caused changes in carbohydrate, protein, lipid, and fatty acid composition in all examined microalgae. The carbohydrate content increased 59% in D. tertiolecta, while the lipid level increased 139% in P. tricornutum under nitrogen stress conditions compared to the control groups. Nitrogen starvation increased the oligosaccharide and polysaccharide contents of D. tertiolecta 4.1-fold and 3.6-fold, respectively. Furthermore, triacylglycerol (TAG) levels in N. oculata and P. tricornutum increased 2.3-fold and 7.4-fold, respectively. The dramatic increase in the amount of TAG is important for the use of these microalgae as raw materials in biodiesel. Nitrogen starvation increased the amounts of oligosaccharides and polysaccharides of D. tertiolecta, while increased eicosapentaenoic acid (EPA) in N. oculata and docosahexaenoic acid (DHA) content in P. tricornutum. The amount of polyunsaturated fatty acids (PUFAs), EPA, DHA, oligosaccharides, and polysaccharides in microalgal species can be increased without using the too costly nitrogen source in the culture conditions, which can reduce the most costly of living feeding.
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Affiliation(s)
- Pınar Akdoğan Şirin
- Fatsa Faculty of Marine Science, Department of Fisheries Technology Engineering, Ordu University, 52400, Fatsa, Ordu, Turkey.
| | - Serpil Serdar
- Faculty of Fisheries, Department of Aquaculture, Ege University, 35030, Bornova, Izmir, Turkey
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2
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Encarnação T, Nicolau N, Ramos P, Silvestre E, Mateus A, de Carvalho TA, Gaspar F, Massano A, Biscaia S, Castro RAE, Nogueira BA, Singh P, Pacheco D, Patrício T, Fausto R, Sobral AJFN. Recycling Ophthalmic Lens Wastewater in a Circular Economy Context: A Case Study with Microalgae Integration. MATERIALS (BASEL, SWITZERLAND) 2023; 17:75. [PMID: 38203929 PMCID: PMC10779472 DOI: 10.3390/ma17010075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Revised: 12/17/2023] [Accepted: 12/18/2023] [Indexed: 01/12/2024]
Abstract
Water pollution poses a global threat to ecosystems and human health and is driven by the presence of various contaminants in wastewater, including nano- and microplastics. Despite the magnitude of this problem, the majority of global wastewater is released untreated into water bodies. To combat this issue, a multi-strategy approach is needed. This study explores a circular economy-based solution for treating emerging pollutants, particularly wastewater from ophthalmic spectacle lens production. Our approach integrates solid waste materials into polymeric and cement matrices while also utilising wastewater for microalgae cultivation. This innovative strategy focuses on biomass generation and economic valorisation. By adopting a circular economy model, we aim to transform environmental pollutants from wastewater into valuable organic products. A key component of our approach is the utilisation of microalgae, specifically Nannochloropsis sp., known for its high lipid content and resilience. This microalgae species serves as a promising biobased feedstock, supporting the production of innovative biobased products, such as biopolymers, for ophthalmic lens manufacturing. Our interdisciplinary approach combines microalgae technology, analytical chemistry, cement production, and polymer processing to develop a sustainable circular economy model that not only addresses environmental concerns, but also offers economic benefits. This study underscores the potential of harnessing high-value products from waste streams and underscores the importance of circular economy principles in tackling pollution and resource challenges.
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Affiliation(s)
- Telma Encarnação
- Coimbra Chemistry Centre-Institute of Molecular Sciences (CQC-IMS), Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal; (R.A.E.C.); (B.A.N.); (D.P.); (R.F.); (A.J.F.N.S.)
- Centre for Rapid and Sustainable Product Development (CDRSP), Polytechnic Institute of Leiria, 2430-028 Marinha Grande, Portugal; (A.M.); (T.A.d.C.); (F.G.); (A.M.); (S.B.); (T.P.)
- PTScience, Avenida do Atlântico, N 16, Office 5.07, Parque das Nações, 1990-019 Lisboa, Portugal; (N.N.); (P.R.); (E.S.); (P.S.)
| | - Nadia Nicolau
- PTScience, Avenida do Atlântico, N 16, Office 5.07, Parque das Nações, 1990-019 Lisboa, Portugal; (N.N.); (P.R.); (E.S.); (P.S.)
| | - Pedro Ramos
- PTScience, Avenida do Atlântico, N 16, Office 5.07, Parque das Nações, 1990-019 Lisboa, Portugal; (N.N.); (P.R.); (E.S.); (P.S.)
- Opticentro, 2460-071 Alcobaça, Portugal
| | - Elsa Silvestre
- PTScience, Avenida do Atlântico, N 16, Office 5.07, Parque das Nações, 1990-019 Lisboa, Portugal; (N.N.); (P.R.); (E.S.); (P.S.)
- Opticentro, 2460-071 Alcobaça, Portugal
| | - Artur Mateus
- Centre for Rapid and Sustainable Product Development (CDRSP), Polytechnic Institute of Leiria, 2430-028 Marinha Grande, Portugal; (A.M.); (T.A.d.C.); (F.G.); (A.M.); (S.B.); (T.P.)
| | - Tomás Archer de Carvalho
- Centre for Rapid and Sustainable Product Development (CDRSP), Polytechnic Institute of Leiria, 2430-028 Marinha Grande, Portugal; (A.M.); (T.A.d.C.); (F.G.); (A.M.); (S.B.); (T.P.)
| | - Florindo Gaspar
- Centre for Rapid and Sustainable Product Development (CDRSP), Polytechnic Institute of Leiria, 2430-028 Marinha Grande, Portugal; (A.M.); (T.A.d.C.); (F.G.); (A.M.); (S.B.); (T.P.)
| | - Anabela Massano
- Centre for Rapid and Sustainable Product Development (CDRSP), Polytechnic Institute of Leiria, 2430-028 Marinha Grande, Portugal; (A.M.); (T.A.d.C.); (F.G.); (A.M.); (S.B.); (T.P.)
| | - Sara Biscaia
- Centre for Rapid and Sustainable Product Development (CDRSP), Polytechnic Institute of Leiria, 2430-028 Marinha Grande, Portugal; (A.M.); (T.A.d.C.); (F.G.); (A.M.); (S.B.); (T.P.)
| | - Ricardo A. E. Castro
- Coimbra Chemistry Centre-Institute of Molecular Sciences (CQC-IMS), Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal; (R.A.E.C.); (B.A.N.); (D.P.); (R.F.); (A.J.F.N.S.)
| | - Bernardo A. Nogueira
- Coimbra Chemistry Centre-Institute of Molecular Sciences (CQC-IMS), Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal; (R.A.E.C.); (B.A.N.); (D.P.); (R.F.); (A.J.F.N.S.)
| | - Poonam Singh
- PTScience, Avenida do Atlântico, N 16, Office 5.07, Parque das Nações, 1990-019 Lisboa, Portugal; (N.N.); (P.R.); (E.S.); (P.S.)
| | - Diana Pacheco
- Coimbra Chemistry Centre-Institute of Molecular Sciences (CQC-IMS), Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal; (R.A.E.C.); (B.A.N.); (D.P.); (R.F.); (A.J.F.N.S.)
- Centre for Rapid and Sustainable Product Development (CDRSP), Polytechnic Institute of Leiria, 2430-028 Marinha Grande, Portugal; (A.M.); (T.A.d.C.); (F.G.); (A.M.); (S.B.); (T.P.)
| | - Tatiana Patrício
- Centre for Rapid and Sustainable Product Development (CDRSP), Polytechnic Institute of Leiria, 2430-028 Marinha Grande, Portugal; (A.M.); (T.A.d.C.); (F.G.); (A.M.); (S.B.); (T.P.)
| | - Rui Fausto
- Coimbra Chemistry Centre-Institute of Molecular Sciences (CQC-IMS), Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal; (R.A.E.C.); (B.A.N.); (D.P.); (R.F.); (A.J.F.N.S.)
- Faculty of Sciences and Letters, Department of Physics, Istanbul Kultur University, Ataköy Campus, Bakirköy, Istanbul 34156, Turkey
| | - Abílio J. F. N. Sobral
- Coimbra Chemistry Centre-Institute of Molecular Sciences (CQC-IMS), Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal; (R.A.E.C.); (B.A.N.); (D.P.); (R.F.); (A.J.F.N.S.)
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Yang H, Wu D, Li H, Hu C. The extracellular polysaccharide determine the physico-chemical surface properties of Microcystis. Front Microbiol 2023; 14:1285229. [PMID: 38125563 PMCID: PMC10732508 DOI: 10.3389/fmicb.2023.1285229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Accepted: 11/10/2023] [Indexed: 12/23/2023] Open
Abstract
Microcystis possesses the capacity to form colonies and blooms in lakes and reservoirs worldwide, causing significant ecological challenges in aquatic ecosystems. However, little is known about the determining factors of physico-chemical surface properties that govern the competitive advantage of Microcystis. Here, The physico-chemical surface properties of Microcystis wesenbergii and Microcystis aeruginosa, including specific surface area (SSA), hydrophobicity, zeta potential, and functional groups were investigated. Additionally, the extracellular polysaccharide (EPS) were analyzed. Laboratory-cultured Microcystis exhibited hydrophilic, a negative zeta potential and negatively charged. Furthermore, no significant relationship was shown between these properties and the cultivation stage. Microcystis wesenbergii exhibited low free energy of cohesion, high surface free energy, high growth rate, and high EPS content during the logarithmic phase. On the other hand, M. aeruginosa displayed lower free energy of cohesion, high surface free energy, high EPS content, and high growth rate during the stationary phase. These characteristics contribute to their respective competitive advantage. Furthermore, the relationship between EPS and surface properties was investigated. The polysaccharide component of EPS primarily influenced the SSA and total surface energy of Microcystis. Likewise, the protein component of EPS influenced hydrophobicity and surface tension. The polysaccharide composition, including glucuronic acid, xylose, and fructose, mainly influenced surface properties. Additionally, hydrophilic groups such as O-H and P-O-P played a crucial role in determining hydrophobicity in Microcystis. This study elucidates that EPS influenced the SSA, hydrophobicity, and surface free energy of Microcystis cells, which in turn impact the formation of Microcystis blooms and the collection.
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Affiliation(s)
- Haijian Yang
- Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
| | - Denghua Wu
- Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Hua Li
- Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
| | - Chunxiang Hu
- Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
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Halder N, Goyal D, Aneja RK. Bioprospecting Microalgae from Sewage Water: Assessment of Biochemicals for Biomass Utilization. Mol Biotechnol 2023:10.1007/s12033-023-00969-8. [PMID: 38010551 DOI: 10.1007/s12033-023-00969-8] [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: 07/25/2023] [Accepted: 10/10/2023] [Indexed: 11/29/2023]
Abstract
Microalgal species from sewage treatment plant were identified by 18S rRNA sequencing and were explored for total lipids, carbohydrate, and protein contents, to serve as a potential candidate for biorefinery. Seven unicellular microalgae were identified as Chlorella sorokiniana, Dictyosphaerium sp., Graesiella emersonii belonging to Chlorellaceae and Scenedesmus sp., Desmodesmus sp., Tetranephris brasiliensis, and Coelastrella sp. belonging to Scenedesmaceae family. Biochemical assessment of all isolates revealed total lipid content from 17.49 ± 1.41 to 47.35 ± 0.61% w/w, total carbohydrate content from 12.82 ± 0.19 to 64.29 ± 0.63% w/w, and total protein content from 8.55 ± 0.19 to 16.65 ± 0.20% w/w. FAME analysis of extracted lipid was found to be rich in Hexadecane (C16:0), Tetradecane (C17:0), Octadecane (C18:0), Eicosane (C20:0), Tetracosane (C24:0), Pentacosane (C25:0) fatty acids, the presence of which makes excellent candidate for biodiesel. Being rich in lipid, microalgae Chlorella sorokiniana, Coelastrella sp., and Scenedesmus sp. have high potential for biofuels. Due to the presence of high protein content, Scenedesmus sp. and Chlorella sorokiniana can serve as food or feed supplement, whereas the high carbohydrate content of Dictyosphaerium sp., Coelastrella sp., and Scenedesmus sp. makes them an ideal candidate for fermentative production of alcohol and organic acids. Chlorella sp. and Scenedesmus sp., being dominant microalgae across all seasons, demonstrate remarkable resilience for their cultivation in sewage water and utilization of biomass in biorefineries.
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Affiliation(s)
- Nirmalya Halder
- Department of Biotechnology, Thapar Institute of Engineering and Technology, Bhadson Road, Patiala, Punjab, 147004, India
| | - Dinesh Goyal
- Department of Biotechnology, Thapar Institute of Engineering and Technology, Bhadson Road, Patiala, Punjab, 147004, India.
| | - Rajiv Kumar Aneja
- Abca BioSolutions Pvt. Ltd., 136 Market Ave, Winnipeg, MB, R3B 3N2, Canada
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Pernas-Pleite C, Conejo-Martínez AM, Fernández Freire P, Hazen MJ, Marín I, Abad JP. Microalga Broths Synthesize Antibacterial and Non-Cytotoxic Silver Nanoparticles Showing Synergy with Antibiotics and Bacterial ROS Induction and Can Be Reused for Successive AgNP Batches. Int J Mol Sci 2023; 24:16183. [PMID: 38003373 PMCID: PMC10670984 DOI: 10.3390/ijms242216183] [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: 09/26/2023] [Revised: 10/31/2023] [Accepted: 11/08/2023] [Indexed: 11/26/2023] Open
Abstract
The era of increasing bacterial antibiotic resistance requires new approaches to fight infections. With this purpose, silver-based nanomaterials are a reality in some fields and promise new developments. We report the green synthesis of silver nanoparticles (AgNPs) using culture broths from a microalga. Broths from two media, with different compositions and pHs and sampled at two growth phases, produced eight AgNP types. Nanoparticles harvested after several synthesis periods showed differences in antibacterial activity and stability. Moreover, an evaluation of the broths for several consecutive syntheses did not find relevant kinetics or activity differences until the third round. Physicochemical characteristics of the AgNPs (core and hydrodynamic sizes, Z-potential, crystallinity, and corona composition) were determined, observing differences depending on the broths used. AgNPs showed good antibacterial activity at concentrations producing no or low cytotoxicity on cultured eukaryotic cells. All the AgNPs had high levels of synergy against Escherichia coli and Staphylococcus aureus with the classic antibiotics streptomycin and kanamycin, but with ampicillin only against S. aureus and tetracycline against E. coli. Differences in the synergy levels were also dependent on the types of AgNPs. We also found that, for some AgNPs, the killing of bacteria started before the massive accumulation of ROS.
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Affiliation(s)
- Carlos Pernas-Pleite
- Department of Molecular Biology, Faculty of Sciences, Biology Building, Autonomous University of Madrid, Cantoblanco, 28049 Madrid, Spain
| | - Amparo M. Conejo-Martínez
- Department of Molecular Biology, Faculty of Sciences, Biology Building, Autonomous University of Madrid, Cantoblanco, 28049 Madrid, Spain
| | - Paloma Fernández Freire
- Department of Biology, Faculty of Sciences, Biology Building, Autonomous University of Madrid, Cantoblanco, 29049 Madrid, Spain
| | - María José Hazen
- Department of Biology, Faculty of Sciences, Biology Building, Autonomous University of Madrid, Cantoblanco, 29049 Madrid, Spain
| | - Irma Marín
- Department of Molecular Biology, Faculty of Sciences, Biology Building, Autonomous University of Madrid, Cantoblanco, 28049 Madrid, Spain
| | - José P. Abad
- Department of Molecular Biology, Faculty of Sciences, Biology Building, Autonomous University of Madrid, Cantoblanco, 28049 Madrid, Spain
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Anjuman A, Xiang Y, Liu G, Cai Y. Compositional and spectroscopic analysis of dissolved organic matter samples from Everglades periphyton and water. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:106502-106513. [PMID: 37730981 DOI: 10.1007/s11356-023-29461-1] [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: 05/11/2022] [Accepted: 08/18/2023] [Indexed: 09/22/2023]
Abstract
Periphyton is a ubiquitous niche in aquatic environments and can be a significant source of dissolved organic matter (DOM) production and leaching, especially in such environment as the Everglades, a slow-water flow wetland in Florida, USA. We employed an array of methods, including compositional analysis, 3-dimensional excitation emission matrix (3-D EEM) fluorescence spectroscopy, and attenuated total reflectance-Fourier transform infrared (ATR-FTIR) spectroscopy, to perform quantitative and qualitative analyses on the DOM produced by periphyton and DOM in surrounding surface water and periphyton overlying water for comparison purposes. Higher dissolved organic carbon (DOC) and total dissolved nitrogen (TDN) contents in periphyton pore water than surface water and periphyton overlying water indicated the remarkable contribution from periphyton-produced DOM. Higher total protein, carbohydrate, and thiol contents in periphyton pore water than in surface water and periphyton overlying water underscored the possibility of periphyton pore water DOM leached from periphyton. These results agreed with 3-D EEM and ATR-FTIR analyses that showed the prevalence of possible microbial source of periphyton pore water DOM as indicated by higher fluorescence index (FI) than surface water and periphyton overlying water. Similarly, the size-fractionated DOM from surface water demonstrated terrestrial sources, and periphyton pore water demonstrated microbial sources regardless of their differences in size based on their FI values. The types of periphyton affect the production and composition of DOM, as evidenced by higher total protein, carbohydrate, and chlorophyll-a (Chl-a) contents in floating mat on the water surface than in epiphyton attached to submerged phytoplankton, probably because the former is photo-synthetically more productive than the latter due to different light availability. This study provided fundamental information on periphyton DOM that is essential for further investigating its role in carbon cycle and its biogeochemistry.
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Affiliation(s)
- Afia Anjuman
- Department of Chemistry and Biochemistry, Florida International University, 11200 SW 8th ST, Miami, FL, 33199, USA
| | - Yuping Xiang
- Department of Chemistry and Biochemistry, Florida International University, 11200 SW 8th ST, Miami, FL, 33199, USA
| | - Guangliang Liu
- Department of Chemistry and Biochemistry, Florida International University, 11200 SW 8th ST, Miami, FL, 33199, USA
| | - Yong Cai
- Department of Chemistry and Biochemistry, Florida International University, 11200 SW 8th ST, Miami, FL, 33199, USA.
- Southeast Environmental Research Center, Florida International University, 11200 SW 8Th ST, Miami, FL, 33199, USA.
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Rostoka E, Shvirksts K, Salna E, Trapina I, Fedulovs A, Grube M, Sokolovska J. Prediction of type 1 diabetes with machine learning algorithms based on FTIR spectral data in peripheral blood mononuclear cells. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2023; 15:4926-4937. [PMID: 37721124 DOI: 10.1039/d3ay01080e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/19/2023]
Abstract
The incidence of autoimmunity is increasing, to ensure timely and comprehensive treatment, there must be a diagnostic method or markers that would be available to the general public. Fourier-transform infrared spectroscopy (FTIR) is a relatively inexpensive and accurate method for determining metabolic fingerprint. The metabolism, molecular composition and function of blood cells vary according to individual physiological and pathological conditions. Thus, by obtaining autoimmune disease-specific metabolic fingerprint markers in peripheral blood mononuclear cells (PBMC) and subsequently using machine learning algorithms, it might be possible to create a tool that will allow the diagnosis of autoimmune diseases. In this preliminary study, it was found that the peak shift at 1545 cm-1 could be considered specific for autoimmune disease type 1 diabetes (T1D), while the shifts at 1070 and 1417 cm-1 could be more attributed to the autoimmune condition per se. The prediction of T1D, despite the small number of participants in the study, showed an inverse AUC = 0.33 ± 0.096, n = 15, indicating a stable trend in the prediction of T1D based on FTIR metabolic fingerprint data in the PBMC.
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Affiliation(s)
- Evita Rostoka
- Faculty of Medicine, University of Latvia, Jelgavas iela 3, LV 1004, Riga, Latvia.
| | - Karlis Shvirksts
- Institute of Microbiology and Biotechnology, University of Latvia, Jelgavas iela 1, LV1004, Riga, Latvia
| | - Edgars Salna
- Faculty of Medicine, University of Latvia, Jelgavas iela 3, LV 1004, Riga, Latvia.
| | - Ilva Trapina
- Institute of Biology, University of Latvia, Jelgavas iela 1, LV1004 Riga, Latvia
| | - Aleksejs Fedulovs
- Faculty of Medicine, University of Latvia, Jelgavas iela 3, LV 1004, Riga, Latvia.
| | - Mara Grube
- Institute of Microbiology and Biotechnology, University of Latvia, Jelgavas iela 1, LV1004, Riga, Latvia
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Korozi E, Kefalogianni I, Tsagou V, Chatzipavlidis I, Markou G, Karnaouri A. Evaluation of Growth and Production of High-Value-Added Metabolites in Scenedesmus quadricauda and Chlorella vulgaris Grown on Crude Glycerol under Heterotrophic and Mixotrophic Conditions Using Monochromatic Light-Emitting Diodes (LEDs). Foods 2023; 12:3068. [PMID: 37628067 PMCID: PMC10453295 DOI: 10.3390/foods12163068] [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: 07/14/2023] [Revised: 08/11/2023] [Accepted: 08/14/2023] [Indexed: 08/27/2023] Open
Abstract
This study aimed to examine the impact of crude glycerol as the main carbon source on the growth, cell morphology, and production of high-value-added metabolites of two microalgal species, namely Chlorella vulgaris and Scenedesmus quadricauda, under heterotrophic and mixotrophic conditions, using monochromatic illumination from light-emitting diodes (LEDs) emitting blue, red, yellow, and white (control) light. The findings indicated that both microalgae strains exhibited higher biomass yield on the mixotrophic growth system when compared to the heterotrophic one, while S. quadricauda generally performed better than C. vulgaris. In mixotrophic mode, the use of different monochromatic illumination affected biomass production differently on both strains. In S. quadricauda, growth rate was higher under red light (μmax = 0.89 d-1), while the highest biomass concentration and yield per gram of consumed glycerol were achieved under yellow light, reaching 1.86 g/L and Yx/s = 0.18, respectively. On the other hand, C. vulgaris demonstrated a higher growth rate on blue light (μmax = 0.45 d-1) and a higher biomass production on white (control) lighting (1.34 g/L). Regarding the production of metabolites, higher yields were achieved during mixotrophic mode in both strains. In C. vulgaris, the highest lipid (26.5% of dry cell weight), protein (63%), and carbohydrate (20.3%) contents were obtained under blue, red, and yellow light, respectively, thus indicating that different light wavelengths probably activate different metabolic pathways. Similar results were obtained for S. quadricauda with red light leading to higher lipid content, while white lighting caused higher production of proteins and carbohydrates. Overall, the study demonstrated the potential of utilizing crude glycerol as a carbon source for the growth and metabolite production of microalgae and, furthermore, revealed that the strains' behavior varied depending on lighting conditions.
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Affiliation(s)
- Evagelina Korozi
- Laboratory of General and Agricultural Microbiology, Department of Crop Science, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece; (E.K.); (I.K.); (V.T.); (I.C.)
| | - Io Kefalogianni
- Laboratory of General and Agricultural Microbiology, Department of Crop Science, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece; (E.K.); (I.K.); (V.T.); (I.C.)
| | - Vasiliki Tsagou
- Laboratory of General and Agricultural Microbiology, Department of Crop Science, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece; (E.K.); (I.K.); (V.T.); (I.C.)
| | - Iordanis Chatzipavlidis
- Laboratory of General and Agricultural Microbiology, Department of Crop Science, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece; (E.K.); (I.K.); (V.T.); (I.C.)
| | - Giorgos Markou
- Laboratory of Food Biotechnology and Recycling of Agricultural By-Products, Institute of Technology of Agricultural Products, Hellenic Agricultural Organization-Demeter, Leof. Sofokli Venizelou 1, Lykovrysi, 14123 Athens, Greece
| | - Anthi Karnaouri
- Laboratory of General and Agricultural Microbiology, Department of Crop Science, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece; (E.K.); (I.K.); (V.T.); (I.C.)
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Kozyatnyk I, Benavente V, Weidemann E, Gentili FG, Jansson S. Influence of hydrothermal carbonization conditions on the porosity, functionality, and sorption properties of microalgae hydrochars. Sci Rep 2023; 13:8562. [PMID: 37236976 DOI: 10.1038/s41598-023-35331-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Accepted: 05/16/2023] [Indexed: 05/28/2023] Open
Abstract
Green microalgae is a possible feedstock for the production of biofuels, chemicals, food/feed, and medical products. Large-scale microalgae production requires large quantities of water and nutrients, directing the attention to wastewater as a cultivation medium. Wastewater-cultivated microalgae could via wet thermochemical conversion be valorised into products for e.g., water treatment. In this study, hydrothermal carbonization was used to process microalgae polycultures grown in municipal wastewater. The objective was to perform a systematic examination of how carbonization temperature, residence time, and initial pH affected solid yield, composition, and properties. Carbonization temperature, time and initial pH all had statistically significant effects on hydrochar properties, with temperature having the most pronounced effect; the surface area increased from 8.5 to 43.6 m2 g-1 as temperature was increased from 180 to 260 °C. However, hydrochars produced at low temperature and initially neutral pH generally had the highest capacity for methylene blue adsorption. DRIFTS analysis of the hydrochar revealed that the pH conditions changed the functional group composition, implying that adsorption was electrostatic interactions driven. This study concludes that un-activated hydrochars from wastewater grown microalgae produced at relatively low hydrothermal carbonization temperatures adsorb methylene blue, despite having low surface area.
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Affiliation(s)
- Ivan Kozyatnyk
- Department of Chemistry, Umeå University, 901 87, Umeå, Sweden
- Department of Health, Medicine and Caring Sciences, Unit of Clinical Medicine, Occupational and Environmental Medicine, Linköping University, 581 83, Linköping, Sweden
| | | | - Eva Weidemann
- Department of Chemistry, Umeå University, 901 87, Umeå, Sweden
| | - Francesco G Gentili
- Department of Forest Biomaterials and Technology, Swedish University of Agricultural Sciences, 901 83, Umeå, Sweden
| | - Stina Jansson
- Department of Chemistry, Umeå University, 901 87, Umeå, Sweden.
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10
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Niemi C, Mortensen AM, Rautenberger R, Matsson S, Gorzsás A, Gentili FG. Rapid and accurate determination of protein content in North Atlantic seaweed by NIR and FTIR spectroscopies. Food Chem 2023; 404:134700. [DOI: 10.1016/j.foodchem.2022.134700] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Revised: 09/26/2022] [Accepted: 10/17/2022] [Indexed: 11/22/2022]
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11
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Leon-Vaz A, Cubero-Cardoso J, Trujillo-Reyes Á, Fermoso FG, León R, Funk C, Vigara J, Urbano J. Enhanced wastewater bioremediation by a sulfur-based copolymer as scaffold for microalgae immobilization (AlgaPol). CHEMOSPHERE 2023; 315:137761. [PMID: 36610507 DOI: 10.1016/j.chemosphere.2023.137761] [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: 11/02/2022] [Revised: 12/28/2022] [Accepted: 01/03/2023] [Indexed: 06/17/2023]
Abstract
In recent years, there has been an increasing concern related to the contamination of aqueous ecosystems by heavy metals, highlighting the need to improve the current techniques for remediation. This work intends to address the problem of removing heavy metals from waterbodies by combining two complementary methodologies: adsorption to a copolymer synthesized by inverse vulcanization of sulfur and vegetable oils and phytoremediation by the microalga Chlorella sorokiniana to enhance the metal adsorption. After studying the tolerance and growth of Chlorella sorokiniana in the presence of the copolymer, the adsorption of highly concentrated Cd2+ (50 mg L-1) by the copolymer and microalgae on their own and the combined immobilized system (AlgaPol) was compared. Additionally, adsorption studies have been performed on mixtures of the heavy metals Cd2+ and Cu2+ at a concentration of 8 mg L-1 each. AlgaPol biofilm is able to remove these metals from the growth medium by more than 90%. The excellent metal adsorption capacity of this biofilm can be kinetically described by a pseudo-second-order model.
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Affiliation(s)
- Antonio Leon-Vaz
- Laboratory of Biochemistry, Faculty of Experimental Sciences. Marine International Campus of Excellence and REMSMA. University of Huelva, 210071, Huelva, Spain; Department of Chemistry, Umeå University, 901 87, Umeå, Sweden.
| | - Juan Cubero-Cardoso
- Laboratory of Sustainable and Circular Technology, CIDERTA and Chemistry Department, Faculty of Experimental Sciences, Campus de "El Carmen", University of Huelva, 21071, Huelva, Spain; Instituto de Grasa, Spanish National Research Council (CSIC), Ctra. de Utrera, km. 1, 41013, Seville, Spain.
| | - Ángeles Trujillo-Reyes
- Instituto de Grasa, Spanish National Research Council (CSIC), Ctra. de Utrera, km. 1, 41013, Seville, Spain.
| | - Fernando G Fermoso
- Instituto de Grasa, Spanish National Research Council (CSIC), Ctra. de Utrera, km. 1, 41013, Seville, Spain.
| | - Rosa León
- Laboratory of Biochemistry, Faculty of Experimental Sciences. Marine International Campus of Excellence and REMSMA. University of Huelva, 210071, Huelva, Spain.
| | - Christiane Funk
- Department of Chemistry, Umeå University, 901 87, Umeå, Sweden.
| | - Javier Vigara
- Laboratory of Biochemistry, Faculty of Experimental Sciences. Marine International Campus of Excellence and REMSMA. University of Huelva, 210071, Huelva, Spain.
| | - Juan Urbano
- Laboratory of Sustainable and Circular Technology, CIDERTA and Chemistry Department, Faculty of Experimental Sciences, Campus de "El Carmen", University of Huelva, 21071, Huelva, Spain.
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12
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Pernas-Pleite C, Conejo-Martínez AM, Marín I, Abad JP. Green Extracellular Synthesis of Silver Nanoparticles by Pseudomonas alloputida, Their Growth and Biofilm-Formation Inhibitory Activities and Synergic Behavior with Three Classical Antibiotics. Molecules 2022; 27:7589. [PMID: 36364415 PMCID: PMC9656067 DOI: 10.3390/molecules27217589] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 11/02/2022] [Accepted: 11/03/2022] [Indexed: 11/26/2023] Open
Abstract
Bacterial resistance to antibiotics is on the rise and hinders the fight against bacterial infections, which are expected to cause millions of deaths by 2050. New antibiotics are difficult to find, so alternatives are needed. One could be metal-based drugs, such as silver nanoparticles (AgNPs). In general, chemical methods for AgNPs' production are potentially toxic, and the physical ones expensive, while green approaches are not. In this paper, we present the green synthesis of AgNPs using two Pseudomonas alloputida B003 UAM culture broths, sampled from their exponential and stationary growth phases. AgNPs were physicochemically characterized by transmission electron microscopy (TEM), total reflection X-ray fluorescence (TXRF), infrared spectroscopy (FTIR), dynamic light scattering (DLS), and X-ray diffraction (XRD), showing differential characteristics depending on the synthesis method used. Antibacterial activity was tested in three assays, and we compared the growth and biofilm-formation inhibition of six test bacteria: Bacillus subtilis, Escherichia coli, Klebsiella pneumoniae, Pseudomonas aeruginosa, Staphylococcus aureus, and Staphylococcus epidermidis. We also monitored nanoparticles' synergic behavior through the growth inhibition of E. coli and S. aureus by three classical antibiotics: ampicillin, nalidixic acid, and streptomycin. The results indicate that very good AgNP activity was obtained with particularly low MICs for the three tested strains of P. aeruginosa. A good synergistic effect on streptomycin activity was observed for all the nanoparticles. For ampicillin, a synergic effect was detected only against S. aureus. ROS production was found to be related to the AgNPs' antibacterial activity.
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Affiliation(s)
| | | | - Irma Marín
- Department of Molecular Biology, Faculty of Sciences, Biology Building, Autonomous University of Madrid, Cantoblanco, 28049 Madrid, Spain
| | - José P. Abad
- Department of Molecular Biology, Faculty of Sciences, Biology Building, Autonomous University of Madrid, Cantoblanco, 28049 Madrid, Spain
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13
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Glinka M, Filatova K, Kucińska-Lipka J, Šopík T, Domincová Bergerová E, Mikulcová V, Wasik A, Sedlařík V. Antibacterial Porous Systems Based on Polylactide Loaded with Amikacin. Molecules 2022; 27:molecules27207045. [PMID: 36296639 PMCID: PMC9609933 DOI: 10.3390/molecules27207045] [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: 09/14/2022] [Revised: 10/14/2022] [Accepted: 10/16/2022] [Indexed: 11/16/2022] Open
Abstract
Three porous matrices based on poly(lactic acid) are proposed herein for the controlled release of amikacin. The materials were fabricated by the method of spraying a surface liquid. Description is given as to the possibility of employing a modifier, such as a silica nanocarrier, for prolonging the release of amikacin, in addition to using chitosan to improve the properties of the materials, e.g., stability and sorption capacity. Depending on their actual composition, the materials exhibited varied efficacy for drug loading, as follows: 25.4 ± 2.2 μg/mg (matrices with 0.05% w/v of chitosan), 93 ± 13 μg/mg (with 0.08% w/v SiO2 amikacin modified nanoparticles), and 96 ± 34 μg/mg (matrices without functional additives). An in vitro study confirmed extended release of the drug (amikacin, over 60 days), carried out in accordance with the mathematical Kosmyer–Pepas model for all the materials tested. The matrices were also evaluated for their effectiveness in inhibiting the growth of bacteria such as Staphylococcus aureus, Escherichia coli, Klebsiella pneumoniae, and Pseudomonas aeruginosa. Concurrent research was conducted on the transdermal absorption, morphology, elemental composition, and thermogravimetric properties of the released drug.
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Affiliation(s)
- Marta Glinka
- Department of Analytical Chemistry, Faculty of Chemistry, Gdańsk University of Technology, 11/12 G. Narutowicza Street, 80-233 Gdańsk, Poland
| | - Katerina Filatova
- Centre of Polymer Systems, University Institute, Tomas Bata University in Zlín, Tomáše Bati 5678 Street, 760 01 Zlín, Czech Republic
| | - Justyna Kucińska-Lipka
- Department of Polymer Technology, Faculty of Chemistry, Gdańsk University of Technology, 11/12 G. Narutowicza Street, 80-233 Gdańsk, Poland
| | - Tomáš Šopík
- Centre of Polymer Systems, University Institute, Tomas Bata University in Zlín, Tomáše Bati 5678 Street, 760 01 Zlín, Czech Republic
| | - Eva Domincová Bergerová
- Centre of Polymer Systems, University Institute, Tomas Bata University in Zlín, Tomáše Bati 5678 Street, 760 01 Zlín, Czech Republic
| | - Veronika Mikulcová
- Centre of Polymer Systems, University Institute, Tomas Bata University in Zlín, Tomáše Bati 5678 Street, 760 01 Zlín, Czech Republic
| | - Andrzej Wasik
- Department of Analytical Chemistry, Faculty of Chemistry, Gdańsk University of Technology, 11/12 G. Narutowicza Street, 80-233 Gdańsk, Poland
- Correspondence:
| | - Vladimir Sedlařík
- Centre of Polymer Systems, University Institute, Tomas Bata University in Zlín, Tomáše Bati 5678 Street, 760 01 Zlín, Czech Republic
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14
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Blaurock J, Baumann S, Grunewald S, Schiller J, Engel KM. Metabolomics of Human Semen: A Review of Different Analytical Methods to Unravel Biomarkers for Male Fertility Disorders. Int J Mol Sci 2022; 23:ijms23169031. [PMID: 36012302 PMCID: PMC9409482 DOI: 10.3390/ijms23169031] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Revised: 08/10/2022] [Accepted: 08/11/2022] [Indexed: 12/01/2022] Open
Abstract
Background: Human life without sperm is not possible. Therefore, it is alarming that the fertilizing ability of human spermatozoa is continuously decreasing. The reasons for that are widely unknown, but there is hope that metabolomics-based investigations may be able to contribute to overcoming this problem. This review summarizes the attempts made so far. Methods: We will discuss liquid chromatography–mass spectrometry (LC-MS), gas chromatography (GC), infrared (IR) and Raman as well as nuclear magnetic resonance (NMR) spectroscopy. Almost all available studies apply one of these methods. Results: Depending on the methodology used, different compounds can be detected, which is (in combination with sophisticated methods of bioinformatics) helpful to estimate the state of the sperm. Often, but not in all cases, there is a correlation with clinical parameters such as the sperm mobility. Conclusions: LC-MS detects the highest number of metabolites and can be considered as the method of choice. Unfortunately, the reproducibility of some studies is poor, and, thus, further improvements of the study designs are needed to overcome this problem. Additionally, a stronger focus on the biochemical consequences of the altered metabolite concentrations is also required.
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Affiliation(s)
- Janet Blaurock
- Training Center of the European Academy of Andrology (EAA), Dermatology, Venerology and Allergology Clinic, University Hospital Leipzig, 04103 Leipzig, Germany
| | - Sven Baumann
- Faculty of Medicine, Institute of Legal Medicine, Leipzig University, 04103 Leipzig, Germany
| | - Sonja Grunewald
- Training Center of the European Academy of Andrology (EAA), Dermatology, Venerology and Allergology Clinic, University Hospital Leipzig, 04103 Leipzig, Germany
| | - Jürgen Schiller
- Faculty of Medicine, Institute for Medical Physics and Biophysics, Leipzig University, 04107 Leipzig, Germany
| | - Kathrin M. Engel
- Training Center of the European Academy of Andrology (EAA), Dermatology, Venerology and Allergology Clinic, University Hospital Leipzig, 04103 Leipzig, Germany
- Faculty of Medicine, Institute for Medical Physics and Biophysics, Leipzig University, 04107 Leipzig, Germany
- Correspondence:
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15
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Poyilil S, Palatel A, Chandrasekharan M. Physico-chemical characterization study of coffee husk for feasibility assessment in fluidized bed gasification process. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:51041-51053. [PMID: 34677764 DOI: 10.1007/s11356-021-17048-7] [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: 07/05/2021] [Accepted: 10/11/2021] [Indexed: 06/13/2023]
Abstract
The biomasses like post-harvest agricultural residues are usually disposed of as landfills and used as cattle fodder and manure. Large quantities of such wastes are often set to open firing. The open firing of such waste biomasses leads to particulate matter emission and air pollution. Kerala, the second-largest producer of coffee in India, produces around 65,925 metric tonnes of coffee. Almost 30-50% of waste is produced during coffee processing, out of which coffee husk has a significant contribution. The thermochemical process like gasification helps in bio-energy extraction and proper disposal of coffee husk. In the present study, the physico-chemical characteristics of coffee husk are studied in detail to investigate its feasibility as a biomass feedstock for thermochemical applications. The thermal degradation of coffee husk at higher temperatures (up to 1000 °C) is investigated using thermogravimetric (TG) analysis. The higher heating value is determined using a bomb calorimeter and is found to be 19.67 MJ/kg. The selected sample has a volatile matter content of 66.85% and fixed carbon content of 14%. The elemental composition is also determined to identify the presence of inorganic elements in the sample. The presence of inorganic elements like potassium and sodium in the feedstock often leads to defluidization when used in fluidized bed gasifiers. The physical and chemical properties analysed would enable in apt handling and treating coffee husk prior to thermochemical processing.
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Affiliation(s)
- Suraj Poyilil
- Department of Mechanical Engineering, National Institute of Technology Calicut, Kozhikode, India.
| | - Arun Palatel
- Department of Mechanical Engineering, National Institute of Technology Calicut, Kozhikode, India
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16
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Gauthier M, Senhorinho G, Basiliko N, Desjardins S, Scott J. Green Photosynthetic Microalgae from Low pH Environments Associated with Mining as a Potential Source of Antioxidants. Ind Biotechnol (New Rochelle N Y) 2022. [DOI: 10.1089/ind.2022.0013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- M.R. Gauthier
- School of Engineering, Laurentian University, Sudbury, Ontario, Canada
| | - G.N.A. Senhorinho
- School of Engineering, Laurentian University, Sudbury, Ontario, Canada
| | - N. Basiliko
- Vale Living with Lakes Centre, Laurentian University, Sudbury, Ontario, Canada
- Department of Biology, Laurentian University, Sudbury, Ontario, Canada
| | - S. Desjardins
- School of Engineering, Laurentian University, Sudbury, Ontario, Canada
| | - J.A. Scott
- School of Engineering, Laurentian University, Sudbury, Ontario, Canada
- Department of Biology, Laurentian University, Sudbury, Ontario, Canada
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17
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FTIR spectral analysis combined with chemometrics in evaluation of composite mixtures of coconut testa flour and wheat flour. JOURNAL OF FOOD MEASUREMENT AND CHARACTERIZATION 2022. [DOI: 10.1007/s11694-022-01287-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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18
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On-Line Monitoring of Biological Parameters in Microalgal Bioprocesses Using Optical Methods. ENERGIES 2022. [DOI: 10.3390/en15030875] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Microalgae are promising sources of fuels and other chemicals. To operate microalgal cultivations efficiently, process control based on monitoring of process variables is needed. On-line sensing has important advantages over off-line and other analytical and sensing methods in minimizing the measurement delay. Consequently, on-line, in-situ sensors are preferred. In this respect, optical sensors occupy a central position since they are versatile and readily implemented in an on-line format. In biotechnological processes, measurements are performed in three phases (gaseous, liquid and solid (biomass)), and monitored process variables can be classified as physical, chemical and biological. On-line sensing technologies that rely on standard industrial sensors employed in chemical processes are already well-established for monitoring the physical and chemical environment of an algal cultivation. In contrast, on-line sensors for the process variables of the biological phase, whether biomass, intracellular or extracellular products, or the physiological state of living cells, are at an earlier developmental stage and are the focus of this review. On-line monitoring of biological process variables is much more difficult and sometimes impossible and must rely on indirect measurement and extensive data processing. In contrast to other recent reviews, this review concentrates on current methods and technologies for monitoring of biological parameters in microalgal cultivations that are suitable for the on-line and in-situ implementation. These parameters include cell concentration, chlorophyll content, irradiance, and lipid and pigment concentration and are measured using NMR, IR spectrophotometry, dielectric scattering, and multispectral methods. An important part of the review is the computer-aided monitoring of microalgal cultivations in the form of software sensors, the use of multi-parameter measurements in mathematical process models, fuzzy logic and artificial neural networks. In the future, software sensors will play an increasing role in the real-time estimation of biological variables because of their flexibility and extendibility.
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19
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Tong CY, Derek CJC. A Methodological Review on the Characterization of Microalgal Biofilm and Its Extracellular Polymeric Substances. J Appl Microbiol 2022; 132:3490-3514. [DOI: 10.1111/jam.15455] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 12/21/2021] [Accepted: 01/17/2022] [Indexed: 11/28/2022]
Affiliation(s)
- C. Y. Tong
- School of Chemical Engineering, Engineering Campus Universiti Sains Malaysia 14300 Nibong Tebal, Penang Malaysia
| | - C. J. C Derek
- School of Chemical Engineering, Engineering Campus Universiti Sains Malaysia 14300 Nibong Tebal, Penang Malaysia
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20
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Glinka M, Filatova K, Kucińska-Lipka J, Bergerova ED, Wasik A, Sedlařík V. Encapsulation of Amikacin into Microparticles Based on Low-Molecular-Weight Poly(lactic acid) and Poly(lactic acid- co-polyethylene glycol). Mol Pharm 2021; 18:2986-2996. [PMID: 34196555 PMCID: PMC8397404 DOI: 10.1021/acs.molpharmaceut.1c00193] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 06/16/2021] [Accepted: 06/21/2021] [Indexed: 11/28/2022]
Abstract
The aim of this study was to fabricate novel microparticles (MPs) for efficient and long-term delivery of amikacin (AMI). The emulsification method proposed for encapsulating AMI employed low-molecular-weight poly(lactic acid) (PLA) and poly(lactic acid-co-polyethylene glycol) (PLA-PEG), both supplemented with poly(vinyl alcohol) (PVA). The diameters of the particles obtained were determined as less than 30 μm. Based on an in-vitro release study, it was proven that the MPs (both PLA/PVA- and PLA-PEG/PVA-based) demonstrated long-term AMI release (2 months), the kinetics of which adhered to the Korsmeyer-Peppas model. The loading efficiencies of AMI in the study were determined at the followings levels: 36.5 ± 1.5 μg/mg for the PLA-based MPs and 106 ± 32 μg/mg for the PLA-PEG-based MPs. These values were relatively high and draw parallels with studies published on the encapsulation of aminoglycosides. The MPs provided antimicrobial action against the Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa, and Klebsiella pneumoniae bacterial strains. The materials were also comprehensively characterized by the following methods: differential scanning calorimetry; gel permeation chromatography; scanning electron microscopy; Fourier transform infrared spectroscopy-attenuated total reflectance; energy-dispersive X-ray fluorescence; and Brunauer-Emmett-Teller surface area analysis. The findings of this study contribute toward discerning new means for conducting targeted therapy with polar, broad spectrum antibiotics.
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Affiliation(s)
- Marta Glinka
- Department
of Analytical Chemistry, Faculty of Chemistry, Gdańsk University of Technology, G. Narutowicza 11/12, Gdańsk 80-233, Poland
| | - Katerina Filatova
- Centre
of Polymer Systems, University Institute, Tomas Bata University in Zlín, Tomáše Bati 5678, Zlín 76001, Czech Republic
| | - Justyna Kucińska-Lipka
- Department
of Polymers Technology, Faculty of Chemistry, Gdańsk University of Technology, G. Narutowicza 11/12, Gdańsk 80-233, Poland
| | - Eva Domincova Bergerova
- Centre
of Polymer Systems, University Institute, Tomas Bata University in Zlín, Tomáše Bati 5678, Zlín 76001, Czech Republic
| | - Andrzej Wasik
- Department
of Analytical Chemistry, Faculty of Chemistry, Gdańsk University of Technology, G. Narutowicza 11/12, Gdańsk 80-233, Poland
| | - Vladimir Sedlařík
- Centre
of Polymer Systems, University Institute, Tomas Bata University in Zlín, Tomáše Bati 5678, Zlín 76001, Czech Republic
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Elbakush AE, Güven D. Evaluation of ethanol tolerance in relation to intracellular storage compounds of Saccharomyces cerevisiae using FT-IR spectroscopy. Process Biochem 2021. [DOI: 10.1016/j.procbio.2020.11.028] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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22
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Gojkovic Z, Shchukarev A, Ramstedt M, Funk C. Cryogenic X-ray photoelectron spectroscopy determines surface composition of algal cells and gives insights into their spontaneous sedimentation. ALGAL RES 2020. [DOI: 10.1016/j.algal.2020.101836] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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23
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Screening Suitability of Northern Hemisphere Algal Strains for Heterotrophic Cultivation and Fatty Acid Methyl Ester Production. Molecules 2020; 25:molecules25092107. [PMID: 32365946 PMCID: PMC7248713 DOI: 10.3390/molecules25092107] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Revised: 04/14/2020] [Accepted: 04/23/2020] [Indexed: 11/17/2022] Open
Abstract
Rapid rises in atmospheric CO2 levels derived from fossil fuel combustion are imposing urgent needs for renewable substitutes. One environmentally friendly alternative is biodiesel produced from suitable microalgal fatty acids. Algal strains normally grow photoautotrophically, but this is problematic in Northern areas because of the light limitations for much of the year. Mixotrophic and particularly heterotrophic strains could be valuable, especially if they can be cultivated in municipal wastewater with contents of nutrients such as nitrogen and phosphorous that should be reduced before release into receiving water. Thus, the aim of this study was to screen for microalgal strains suitable for heterotrophic cultivation with a cheap carbon source (glycerol) for biodiesel production in Nordic, and other high-latitude, countries. One of the examined strains, a Desmodesmus sp. strain designated 2-6, accumulated biomass at similar rates in heterotrophic conditions with 40 mM glycerol as in autotrophic conditions. Furthermore, in heterotrophic conditions it produced more fatty acids, and ca. 50% more C18:1 fatty acids, as well as showing a significant decrease in C18:3 fatty acids, all of which are highly desirable features for biodiesel production.
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