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Low Electromagnetic Fields Applied to Chlorella fusca Cultivation to Increase Production of Microalga-Based Carbohydrates

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Abstract

Magnetic fields (MF) may be generated, either by magnets or by electric current, and may interact with biological systems, causing changes in their properties. Thus, MF in microalga cultures may improve cell growth, alter biomass composition, and produce high-added-value biomolecules of interest. Therefore, this study is aimed at investigating the influence of low electromagnetic field (EMF) application (5 mT) on Chlorella fusca LEB 111 growth, biochemical composition of biomass, and carbohydrate productivity when cultivated in vertical tubular photobioreactors. EMF were applied for 1 h/day for 15 days. They stimulated C. fusca growth by 8.9 % and rendered 1.71 g/L biomass by comparison with the control culture (CC—without any EMF application). EMF application increased carbohydrate content (31.1 %) and carbohydrate productivity (3.54 mg/L·d), which were 24.7 and 35.8 % higher than the CC, respectively. Since studies of low EMF in microalga cultures are scarce, this study elucidated EMF application to C. fusca cultivation as a non-toxic and low-cost alternative whose focus is enhancement of carbohydrate production.

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Funding

This study was partially funded by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES), Brasil, Finance Code 001. The authors are also thankful for the financial support provided by the National Counsel for Technological and Scientific Development (CNPq), Brazil.

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Authors and Affiliations

  1. Laboratory of Biochemical Engineering, School of Chemistry and Food, Federal University of Rio Grande, Rio Grande, RS, 96203-900, Brazil

    Kricelle Mosquera Deamici & Jorge Alberto Vieira Costa

  2. Laboratory of Biotechnology, School of Chemistry and Food, Federal University of Rio Grande, Rio Grande, RS, 96203-900, Brazil

    Pedro Garcia Pereira Silva & Lucielen Oliveira Santos

Authors
  1. Kricelle Mosquera Deamici
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  2. Pedro Garcia Pereira Silva
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  3. Jorge Alberto Vieira Costa
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  4. Lucielen Oliveira Santos
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Contributions

KMD: conceptualization, methodology, investigation, writing, review, and editing original draft; PGPS: conceptualization, writing, review, and editing original draft; JAVC: conceptualization, visualization, and reviewing original draft; LOS: project administration, supervision, writing, review, and editing original draft. All authors read and approved the manuscript.

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Correspondence to Lucielen Oliveira Santos.

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Deamici, K.M., Silva, P.G.P., Costa, J.A.V. et al. Low Electromagnetic Fields Applied to Chlorella fusca Cultivation to Increase Production of Microalga-Based Carbohydrates. Bioenerg. Res. 16, 1548–1555 (2023). https://doi.org/10.1007/s12155-022-10562-7

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