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Corrêa da Silva MG, Pires Ferreira S, Dora CL, Hort MA, Giroldo D, Prates DF, Radmann EM, Bemvenuti RH, Costa JAV, Badiale-Furlong E, Muccillo-Baisch AL. Phenolic compounds and antioxidant capacity of Pediastrum boryanum (Chlorococcales) biomass. Int J Environ Health Res 2022; 32:168-180. [PMID: 32200653 DOI: 10.1080/09603123.2020.1744113] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2019] [Accepted: 03/11/2020] [Indexed: 06/10/2023]
Abstract
Bioactive compounds, synthesized by photosynthetic microorganisms, have drawn the attention of the pharmaceutical field. This study aimed at evaluating synthesis and in vitro antioxidant capacity of phenolic compounds produced by a microalgae species P. boryanum, which was grown in six different culture media (standard BG11, modified BG11/MBG11, standard WC, modified WC, WC*2 and basal). The highest concentrations of biomass (1.75 ± 0.01 g.L-1) and phenolic content (3.18 ± 0.00 mg.g-1) were obtained when P. boryanum was grown in MBG11 and phenolic acids were identified: gallic, protocatechuic, chlorogenic, hydroxybenzoic and vanillic ones. All extracts exhibited scavenger activity in the ABTS assay and inhibited peroxidase. However, phenolic compounds from P. boryanum grown in BG11 and MBG11 had the most potent scavenger activity in the DPPH assay. In sum, P. boryanum can be a new source of free phenolic compounds with potential antioxidant activity when grown in MBG11, since it yields high amounts of biomass and phenolic compounds.
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Affiliation(s)
- Marilia Garcez Corrêa da Silva
- Programa de Pós-Graduação em Ciências da Saúde, Faculdade de Medicina, Universidade Federal do Rio Grande - FURG, Rio Grande, Brazil
| | - Shana Pires Ferreira
- Programa de Pós-Graduação em Ciências da Saúde, Faculdade de Medicina, Universidade Federal do Rio Grande - FURG, Rio Grande, Brazil
| | - Cristiana Lima Dora
- Programa de Pós-Graduação em Ciências da Saúde, Faculdade de Medicina, Universidade Federal do Rio Grande - FURG, Rio Grande, Brazil
- Instituto de Ciências Biológicas, Universidade Federal do Rio Grande - FURG, Rio Grande, RS, Brazil
| | - Mariana Appel Hort
- Programa de Pós-Graduação em Ciências da Saúde, Faculdade de Medicina, Universidade Federal do Rio Grande - FURG, Rio Grande, Brazil
- Instituto de Ciências Biológicas, Universidade Federal do Rio Grande - FURG, Rio Grande, RS, Brazil
| | - Danilo Giroldo
- Instituto de Ciências Biológicas, Universidade Federal do Rio Grande - FURG, Rio Grande, RS, Brazil
- Programa de Pós-Graduação em Biologia dos Ambientes Aquáticos Continentais, Instituto de Ciências Biológicas, Universidade Federal do Rio Grande - FURG, Rio Grande, RS, Brazil
| | - Denise Fontoura Prates
- Programa de Pós-Graduação em Engenharia e Ciência de Alimentos, Escola de Química e Alimentos Alimentos, Universidade Federal do Rio Grande - FURG, Rio Grande, RS, Brazil
| | - Elisangela Martha Radmann
- Programa de Pós-Graduação em Engenharia e Ciência de Alimentos, Escola de Química e Alimentos Alimentos, Universidade Federal do Rio Grande - FURG, Rio Grande, RS, Brazil
| | - Renata Heidtmann Bemvenuti
- Programa de Pós-Graduação em Engenharia e Ciência de Alimentos, Escola de Química e Alimentos Alimentos, Universidade Federal do Rio Grande - FURG, Rio Grande, RS, Brazil
| | - Jorge Alberto Vieira Costa
- Programa de Pós-Graduação em Engenharia e Ciência de Alimentos, Escola de Química e Alimentos Alimentos, Universidade Federal do Rio Grande - FURG, Rio Grande, RS, Brazil
| | - Eliana Badiale-Furlong
- Programa de Pós-Graduação em Engenharia e Ciência de Alimentos, Escola de Química e Alimentos Alimentos, Universidade Federal do Rio Grande - FURG, Rio Grande, RS, Brazil
| | - Ana Luiza Muccillo-Baisch
- Programa de Pós-Graduação em Ciências da Saúde, Faculdade de Medicina, Universidade Federal do Rio Grande - FURG, Rio Grande, Brazil
- Instituto de Ciências Biológicas, Universidade Federal do Rio Grande - FURG, Rio Grande, RS, Brazil
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Park JBK, Craggs RJ, Shilton AN. Algal recycling enhances algal productivity and settleability in Pediastrum boryanum pure cultures. Water Res 2015; 87:97-104. [PMID: 26397451 DOI: 10.1016/j.watres.2015.09.013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2015] [Revised: 08/25/2015] [Accepted: 09/07/2015] [Indexed: 06/05/2023]
Abstract
Recycling a portion of gravity harvested algae (i.e. algae and associated bacteria biomass) has been shown to improve both algal biomass productivity and harvest efficiency by maintaining the dominance of a rapidly-settleable colonial alga, Pediastrum boryanum in both pilot-scale wastewater treatment High Rate Algal Ponds (HRAP) and outdoor mesocosms. While algal recycling did not change the relative proportions of algae and bacteria in the HRAP culture, the contribution of the wastewater bacteria to the improved algal biomass productivity and settleability with the recycling was not certain and still required investigation. P. boryanum was therefore isolated from the HRAP and grown in pure culture on synthetic wastewater growth media under laboratory conditions. The influence of recycling on the productivity and settleability of the pure P. boryanum culture was then determined without wastewater bacteria present. Six 1 L P. boryanum cultures were grown over 30 days in a laboratory growth chamber simulating New Zealand summer conditions either with (Pr) or without (Pc) recycling of 10% of gravity harvested algae. The cultures with recycling (Pr) had higher algal productivity than the controls (Pc) when the cultures were operated at both 4 and 3 d hydraulic retention times by 11% and 38% respectively. Furthermore, algal recycling also improved 1 h settleability from ∼60% to ∼85% by increasing the average P. boryanum colony size due to the extended mean cell residence time and promoted formation of large algal bio-flocs (>500 μm diameter). These results demonstrate that the presence of wastewater bacteria was not necessary to improve algal productivity and settleability with algal recycling.
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Affiliation(s)
- Jason B K Park
- National Institute of Water and Atmospheric Research Ltd (NIWA), P. O. Box 11-115, Hamilton, New Zealand.
| | - Rupert J Craggs
- National Institute of Water and Atmospheric Research Ltd (NIWA), P. O. Box 11-115, Hamilton, New Zealand.
| | - Andy N Shilton
- School of Engineering and Advanced Technology, Massey University, Private Bag 11 222, Palmerston North, New Zealand.
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