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.
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Posted 06 Aug, 2020
On 16 Aug, 2020
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On 16 Apr, 2020
On 15 Apr, 2020
On 11 Apr, 2020
On 04 Apr, 2020
Posted 06 Aug, 2020
On 16 Aug, 2020
On 02 Aug, 2020
On 30 Jul, 2020
On 29 Jul, 2020
On 29 Jul, 2020
On 28 Jun, 2020
Received 27 Jun, 2020
Received 25 Jun, 2020
On 18 Jun, 2020
Received 18 Jun, 2020
On 17 Jun, 2020
On 17 Jun, 2020
Received 17 Jun, 2020
On 16 Jun, 2020
Invitations sent on 16 Jun, 2020
On 16 Jun, 2020
On 15 Jun, 2020
On 15 Jun, 2020
Received 18 May, 2020
On 18 May, 2020
Received 12 May, 2020
Received 08 May, 2020
On 27 Apr, 2020
On 27 Apr, 2020
Received 25 Apr, 2020
On 20 Apr, 2020
On 20 Apr, 2020
Invitations sent on 19 Apr, 2020
On 16 Apr, 2020
On 15 Apr, 2020
On 11 Apr, 2020
On 04 Apr, 2020
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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