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Mariana Barbalho Silva
Universidade Federal do Rio de Janeiro
Corresponding Author
ORCiD: https://orcid.org/0000-0002-5053-409X
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Arthrospira platensis is a cyanobacterium that is of great biotechnological interest, particularly for the food industry, as it possesses a high content of proteins, pigments, lipids and carbohydrates. Cyanobacteria produce extracellular polymeric substances (EPS), which are co-products of secondary metabolism that present thickening or gelling properties. A 3-level factorial design was used to study the combined effect of different nitrate concentrations and photon flux density (PFD) values to evaluate the biomass and EPS production of A. platensis. The best result in terms of biomass production was obtained under condition 6 (2 g.L-1 NaNO3 and 600 μE.m-2.s-1) yielding a concentration of 1.292 g.L-1. However, condition 1 (0.25 g.L-1 NaNO3 and 200 μE.m-2.s-1) produced the greatest EPS yield (111 mg.g-1), followed by condition 9 (2 g.L-1 NaNO3 and 1000 μE.m-2.s-1). FTIR analyses of EPS samples indicated the presence of carboxylate and sulfate functional groups, and rheological studies of the EPS at 5 and 10 g.L-1 revealed a dilute solution behavior.
Keywords
Arthrospira platensis; Cyanobacteria; Extracellular Polymeric Substances
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Editorial decision: Major revision
On 18 May, 2020
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Received 12 May, 2020
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Received 08 May, 2020
Reviewer #3 agreed
On 27 Apr, 2020
Reviewer #4 agreed
On 27 Apr, 2020
Review #1 received
Received 25 Apr, 2020
Reviewer #1 agreed
On 20 Apr, 2020
Reviewer #2 agreed
On 20 Apr, 2020
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See the published version of this preprint at Bioresources and Bioprocessing.
This is a preprint, a preliminary version of a manuscript that has not completed peer review at a journal. Research Square does not conduct peer review prior to posting preprints. The posting of a preprint on this server should not be interpreted as an endorsement of its validity or suitability for dissemination as established information or for guiding clinical practice.
Learn more about In Review
Research
Mariana Barbalho Silva
Universidade Federal do Rio de Janeiro
Corresponding Author
ORCiD: https://orcid.org/0000-0002-5053-409X
Badges
Prescreen
This manuscript passed our Prescreen assessment
Complete author information
Appropriate declaration statements
Potential risks to human health
Prescreen
Peer Review Timeline
CURRENT STATUS: Published
View the published article at Bioresources and Bioprocessing.
Version 3
Posted 06 Aug, 2020
No community comments so far
Editorial decision: Accept
On 02 Aug, 2020
Editor assigned
On 30 Jul, 2020
Submission checks complete
On 29 Jul, 2020
Editor invited
On 29 Jul, 2020
No comments provided
Editorial decision: Minor revision
On 28 Jun, 2020
Review #1 received
Received 27 Jun, 2020
Review #4 received
Received 25 Jun, 2020
Reviewer #4 agreed
On 18 Jun, 2020
Review #3 received
Received 18 Jun, 2020
Reviewer #2 agreed
On 17 Jun, 2020
Reviewer #3 agreed
On 17 Jun, 2020
Review #2 received
Received 17 Jun, 2020
Editor assigned
On 16 Jun, 2020
Reviewers invited
Invitations sent on 16 Jun, 2020
Reviewer #1 agreed
On 16 Jun, 2020
Submission checks complete
On 15 Jun, 2020
Editor invited
On 15 Jun, 2020
No comments provided
Review #4 received
Received 18 May, 2020
Editorial decision: Major revision
On 18 May, 2020
Review #3 received
Received 12 May, 2020
Review #2 received
Received 08 May, 2020
Reviewer #3 agreed
On 27 Apr, 2020
Reviewer #4 agreed
On 27 Apr, 2020
Review #1 received
Received 25 Apr, 2020
Reviewer #1 agreed
On 20 Apr, 2020
Reviewer #2 agreed
On 20 Apr, 2020
Reviewers invited
Invitations sent on 19 Apr, 2020
Editor assigned
On 16 Apr, 2020
Editor invited
On 15 Apr, 2020
Submission checks complete
On 11 Apr, 2020
First submitted
On 04 Apr, 2020
Metrics
Comments: 0
PDF Downloads: ...
HTML Views: ...
Subject Areas
Biotechnology and Bioengineering
License:
This work is licensed under a CC BY 4.0 License. Read Full License
View the published article at Bioresources and Bioprocessing.
Arthrospira platensis is a cyanobacterium that is of great biotechnological interest, particularly for the food industry, as it possesses a high content of proteins, pigments, lipids and carbohydrates. Cyanobacteria produce extracellular polymeric substances (EPS), which are co-products of secondary metabolism that present thickening or gelling properties. A 3-level factorial design was used to study the combined effect of different nitrate concentrations and photon flux density (PFD) values to evaluate the biomass and EPS production of A. platensis. The best result in terms of biomass production was obtained under condition 6 (2 g.L-1 NaNO3 and 600 μE.m-2.s-1) yielding a concentration of 1.292 g.L-1. However, condition 1 (0.25 g.L-1 NaNO3 and 200 μE.m-2.s-1) produced the greatest EPS yield (111 mg.g-1), followed by condition 9 (2 g.L-1 NaNO3 and 1000 μE.m-2.s-1). FTIR analyses of EPS samples indicated the presence of carboxylate and sulfate functional groups, and rheological studies of the EPS at 5 and 10 g.L-1 revealed a dilute solution behavior.
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
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