Influence of culture conditions on the production of extracellular polymeric substances (EPS) by Arthrospira platensis

Abstract 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...
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Autor*in:	Silva, Mariana B. F. [verfasserIn] Azero, Edwin G. [verfasserIn] Teixeira, Cláudia M. L. L. [verfasserIn] Andrade, Cristina T. [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2020

Schlagwörter:	Cyanobacteria Extracellular polymeric substances

Übergeordnetes Werk:	Enthalten in: Bioresources and Bioprocessing - Berlin : SpringerOpen, 2014, 7(2020), 1 vom: 16. Aug.
Übergeordnetes Werk:	volume:7 ; year:2020 ; number:1 ; day:16 ; month:08

Links:	Volltext

DOI / URN:	10.1186/s40643-020-00337-3

Katalog-ID:	SPR040673057

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allfields	10.1186/s40643-020-00337-3 doi (DE-627)SPR040673057 (SPR)s40643-020-00337-3-e DE-627 ger DE-627 rakwb eng 570 ASE Silva, Mariana B. F. verfasserin aut Influence of culture conditions on the production of extracellular polymeric substances (EPS) by Arthrospira platensis 2020 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract 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} $ $ NaNO_{3} $ and 600 μE $ m^{−2} $ $ s^{−1} $) yielding a concentration of 1.292 g $ L^{−1} $. However, condition 1 (0.25 g $ L^{−1} $ $ NaNO_{3} $ and 200 μE $ m^{−2} $ $ s^{−1} $) produced the greatest EPS yield (111 mg $ g^{−1} $), followed by condition 9 (2 g $ L^{−1} $ $ NaNO_{3} $ 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. Cyanobacteria (dpeaa)DE-He213 Extracellular polymeric substances (dpeaa)DE-He213 Azero, Edwin G. verfasserin aut Teixeira, Cláudia M. L. L. verfasserin aut Andrade, Cristina T. verfasserin aut Enthalten in Bioresources and Bioprocessing Berlin : SpringerOpen, 2014 7(2020), 1 vom: 16. Aug. (DE-627)79738166X (DE-600)2785482-6 2197-4365 nnns volume:7 year:2020 number:1 day:16 month:08 https://dx.doi.org/10.1186/s40643-020-00337-3 kostenfrei Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 7 2020 1 16 08
spelling	10.1186/s40643-020-00337-3 doi (DE-627)SPR040673057 (SPR)s40643-020-00337-3-e DE-627 ger DE-627 rakwb eng 570 ASE Silva, Mariana B. F. verfasserin aut Influence of culture conditions on the production of extracellular polymeric substances (EPS) by Arthrospira platensis 2020 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract 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} $ $ NaNO_{3} $ and 600 μE $ m^{−2} $ $ s^{−1} $) yielding a concentration of 1.292 g $ L^{−1} $. However, condition 1 (0.25 g $ L^{−1} $ $ NaNO_{3} $ and 200 μE $ m^{−2} $ $ s^{−1} $) produced the greatest EPS yield (111 mg $ g^{−1} $), followed by condition 9 (2 g $ L^{−1} $ $ NaNO_{3} $ 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. Cyanobacteria (dpeaa)DE-He213 Extracellular polymeric substances (dpeaa)DE-He213 Azero, Edwin G. verfasserin aut Teixeira, Cláudia M. L. L. verfasserin aut Andrade, Cristina T. verfasserin aut Enthalten in Bioresources and Bioprocessing Berlin : SpringerOpen, 2014 7(2020), 1 vom: 16. Aug. (DE-627)79738166X (DE-600)2785482-6 2197-4365 nnns volume:7 year:2020 number:1 day:16 month:08 https://dx.doi.org/10.1186/s40643-020-00337-3 kostenfrei Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 7 2020 1 16 08
allfields_unstemmed	10.1186/s40643-020-00337-3 doi (DE-627)SPR040673057 (SPR)s40643-020-00337-3-e DE-627 ger DE-627 rakwb eng 570 ASE Silva, Mariana B. F. verfasserin aut Influence of culture conditions on the production of extracellular polymeric substances (EPS) by Arthrospira platensis 2020 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract 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} $ $ NaNO_{3} $ and 600 μE $ m^{−2} $ $ s^{−1} $) yielding a concentration of 1.292 g $ L^{−1} $. However, condition 1 (0.25 g $ L^{−1} $ $ NaNO_{3} $ and 200 μE $ m^{−2} $ $ s^{−1} $) produced the greatest EPS yield (111 mg $ g^{−1} $), followed by condition 9 (2 g $ L^{−1} $ $ NaNO_{3} $ 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. Cyanobacteria (dpeaa)DE-He213 Extracellular polymeric substances (dpeaa)DE-He213 Azero, Edwin G. verfasserin aut Teixeira, Cláudia M. L. L. verfasserin aut Andrade, Cristina T. verfasserin aut Enthalten in Bioresources and Bioprocessing Berlin : SpringerOpen, 2014 7(2020), 1 vom: 16. Aug. (DE-627)79738166X (DE-600)2785482-6 2197-4365 nnns volume:7 year:2020 number:1 day:16 month:08 https://dx.doi.org/10.1186/s40643-020-00337-3 kostenfrei Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 7 2020 1 16 08
allfieldsGer	10.1186/s40643-020-00337-3 doi (DE-627)SPR040673057 (SPR)s40643-020-00337-3-e DE-627 ger DE-627 rakwb eng 570 ASE Silva, Mariana B. F. verfasserin aut Influence of culture conditions on the production of extracellular polymeric substances (EPS) by Arthrospira platensis 2020 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract 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} $ $ NaNO_{3} $ and 600 μE $ m^{−2} $ $ s^{−1} $) yielding a concentration of 1.292 g $ L^{−1} $. However, condition 1 (0.25 g $ L^{−1} $ $ NaNO_{3} $ and 200 μE $ m^{−2} $ $ s^{−1} $) produced the greatest EPS yield (111 mg $ g^{−1} $), followed by condition 9 (2 g $ L^{−1} $ $ NaNO_{3} $ 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. Cyanobacteria (dpeaa)DE-He213 Extracellular polymeric substances (dpeaa)DE-He213 Azero, Edwin G. verfasserin aut Teixeira, Cláudia M. L. L. verfasserin aut Andrade, Cristina T. verfasserin aut Enthalten in Bioresources and Bioprocessing Berlin : SpringerOpen, 2014 7(2020), 1 vom: 16. Aug. (DE-627)79738166X (DE-600)2785482-6 2197-4365 nnns volume:7 year:2020 number:1 day:16 month:08 https://dx.doi.org/10.1186/s40643-020-00337-3 kostenfrei Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 7 2020 1 16 08
allfieldsSound	10.1186/s40643-020-00337-3 doi (DE-627)SPR040673057 (SPR)s40643-020-00337-3-e DE-627 ger DE-627 rakwb eng 570 ASE Silva, Mariana B. F. verfasserin aut Influence of culture conditions on the production of extracellular polymeric substances (EPS) by Arthrospira platensis 2020 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract 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} $ $ NaNO_{3} $ and 600 μE $ m^{−2} $ $ s^{−1} $) yielding a concentration of 1.292 g $ L^{−1} $. However, condition 1 (0.25 g $ L^{−1} $ $ NaNO_{3} $ and 200 μE $ m^{−2} $ $ s^{−1} $) produced the greatest EPS yield (111 mg $ g^{−1} $), followed by condition 9 (2 g $ L^{−1} $ $ NaNO_{3} $ 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. Cyanobacteria (dpeaa)DE-He213 Extracellular polymeric substances (dpeaa)DE-He213 Azero, Edwin G. verfasserin aut Teixeira, Cláudia M. L. L. verfasserin aut Andrade, Cristina T. verfasserin aut Enthalten in Bioresources and Bioprocessing Berlin : SpringerOpen, 2014 7(2020), 1 vom: 16. Aug. (DE-627)79738166X (DE-600)2785482-6 2197-4365 nnns volume:7 year:2020 number:1 day:16 month:08 https://dx.doi.org/10.1186/s40643-020-00337-3 kostenfrei Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 7 2020 1 16 08
language	English
source	Enthalten in Bioresources and Bioprocessing 7(2020), 1 vom: 16. Aug. volume:7 year:2020 number:1 day:16 month:08
sourceStr	Enthalten in Bioresources and Bioprocessing 7(2020), 1 vom: 16. Aug. volume:7 year:2020 number:1 day:16 month:08
format_phy_str_mv	Article
institution	findex.gbv.de
topic_facet	Cyanobacteria Extracellular polymeric substances
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isfreeaccess_bool	true
container_title	Bioresources and Bioprocessing
authorswithroles_txt_mv	Silva, Mariana B. F. @@aut@@ Azero, Edwin G. @@aut@@ Teixeira, Cláudia M. L. L. @@aut@@ Andrade, Cristina T. @@aut@@
publishDateDaySort_date	2020-08-16T00:00:00Z
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F.</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="245" ind1="1" ind2="0"><subfield code="a">Influence of culture conditions on the production of extracellular polymeric substances (EPS) by Arthrospira platensis</subfield></datafield><datafield tag="264" ind1=" " ind2="1"><subfield code="c">2020</subfield></datafield><datafield tag="336" ind1=" " ind2=" "><subfield code="a">Text</subfield><subfield code="b">txt</subfield><subfield code="2">rdacontent</subfield></datafield><datafield tag="337" ind1=" " ind2=" "><subfield code="a">Computermedien</subfield><subfield code="b">c</subfield><subfield code="2">rdamedia</subfield></datafield><datafield tag="338" ind1=" " ind2=" "><subfield code="a">Online-Ressource</subfield><subfield code="b">cr</subfield><subfield code="2">rdacarrier</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">Abstract 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} $ $ NaNO_{3} $ and 600 μE $ m^{−2} $ $ s^{−1} $) yielding a concentration of 1.292 g $ L^{−1} $. However, condition 1 (0.25 g $ L^{−1} $ $ NaNO_{3} $ and 200 μE $ m^{−2} $ $ s^{−1} $) produced the greatest EPS yield (111 mg $ g^{−1} $), followed by condition 9 (2 g $ L^{−1} $ $ NaNO_{3} $ and 1000 μE $ m^{−2} $ $ s^{−1} $). 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author	Silva, Mariana B. F.
spellingShingle	Silva, Mariana B. F. ddc 570 misc Cyanobacteria misc Extracellular polymeric substances Influence of culture conditions on the production of extracellular polymeric substances (EPS) by Arthrospira platensis
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topic_title	570 ASE Influence of culture conditions on the production of extracellular polymeric substances (EPS) by Arthrospira platensis Cyanobacteria (dpeaa)DE-He213 Extracellular polymeric substances (dpeaa)DE-He213
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title	Influence of culture conditions on the production of extracellular polymeric substances (EPS) by Arthrospira platensis
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title_full	Influence of culture conditions on the production of extracellular polymeric substances (EPS) by Arthrospira platensis
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author_browse	Silva, Mariana B. F. Azero, Edwin G. Teixeira, Cláudia M. L. L. Andrade, Cristina T.
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title_sort	influence of culture conditions on the production of extracellular polymeric substances (eps) by arthrospira platensis
title_auth	Influence of culture conditions on the production of extracellular polymeric substances (EPS) by Arthrospira platensis
abstract	Abstract 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} $ $ NaNO_{3} $ and 600 μE $ m^{−2} $ $ s^{−1} $) yielding a concentration of 1.292 g $ L^{−1} $. However, condition 1 (0.25 g $ L^{−1} $ $ NaNO_{3} $ and 200 μE $ m^{−2} $ $ s^{−1} $) produced the greatest EPS yield (111 mg $ g^{−1} $), followed by condition 9 (2 g $ L^{−1} $ $ NaNO_{3} $ 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.
abstractGer	Abstract 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} $ $ NaNO_{3} $ and 600 μE $ m^{−2} $ $ s^{−1} $) yielding a concentration of 1.292 g $ L^{−1} $. However, condition 1 (0.25 g $ L^{−1} $ $ NaNO_{3} $ and 200 μE $ m^{−2} $ $ s^{−1} $) produced the greatest EPS yield (111 mg $ g^{−1} $), followed by condition 9 (2 g $ L^{−1} $ $ NaNO_{3} $ 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.
abstract_unstemmed	Abstract 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} $ $ NaNO_{3} $ and 600 μE $ m^{−2} $ $ s^{−1} $) yielding a concentration of 1.292 g $ L^{−1} $. However, condition 1 (0.25 g $ L^{−1} $ $ NaNO_{3} $ and 200 μE $ m^{−2} $ $ s^{−1} $) produced the greatest EPS yield (111 mg $ g^{−1} $), followed by condition 9 (2 g $ L^{−1} $ $ NaNO_{3} $ 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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title_short	Influence of culture conditions on the production of extracellular polymeric substances (EPS) by Arthrospira platensis
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Influence of culture conditions on the production of extracellular polymeric substances (EPS) by Arthrospira platensis

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