Thermal and Rheological Properties of a Family of Botryosphaerans Produced by Botryosphaeria rhodina MAMB-05
Autor(a) principal: | |
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Data de Publicação: | 2011 |
Outros Autores: | , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.3390/molecules16097488 http://hdl.handle.net/11449/6943 |
Resumo: | Differential scanning calorimetry (DSC), thermogravimetry (TG) and Fourier-transform infra-red spectroscopy (FT-IR) analyses were performed to investigate changes in the physico-chemical properties of botryosphaerans, a family of exopolysaccharides (EPS) produced by the fungus Botryosphaeria rhodina MAMB-05 grown on glucose (EPS(GLC)), sucrose (EPS(SUC)) and fructose (EPS(FRU)). A slight endothermic transition and small mass loss attributable to the removal of water of hydration were observed in the DSC and TG analyses, respectively, for the three EPS samples. The FT-IR spectra confirmed no structural changes occurred during thermal treatment. Viscometry was utilized to obtain information on the rheological behaviour of the EPS in aqueous solutions. The Power Law and Cross Equations determined the natural pseudoplastic characteristics of the EPS. Comparatively, results obtained for EPS produced when B. rhodina MAMB-05 was grown on each of the three carbohydrate sources demonstrated similar apparent viscosity values for EPS(GLC) and EPS(SUC), while EPS(FRU) displayed the lowest apparent viscosity of the three botryosphaerans, suggesting a higher degree of ramification and lower Mw. EPS(GLC) and EPSSUC possessed similar degrees of ramification. The slight differences found in their viscosities can be explained by the differences in the type of branching among the three botryosphaerans, thus varying the strength of intermolecular interactions and consequently, consistency and viscosity. The physico-chemical studies of botryosphaerans represent the originality of this work, and the knowledge of these properties is an important criterion for potential applications. |
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Thermal and Rheological Properties of a Family of Botryosphaerans Produced by Botryosphaeria rhodina MAMB-05beta-glucansbotryosphaeranthermal analysisFT-IR spectroscopyrheologyDifferential scanning calorimetry (DSC), thermogravimetry (TG) and Fourier-transform infra-red spectroscopy (FT-IR) analyses were performed to investigate changes in the physico-chemical properties of botryosphaerans, a family of exopolysaccharides (EPS) produced by the fungus Botryosphaeria rhodina MAMB-05 grown on glucose (EPS(GLC)), sucrose (EPS(SUC)) and fructose (EPS(FRU)). A slight endothermic transition and small mass loss attributable to the removal of water of hydration were observed in the DSC and TG analyses, respectively, for the three EPS samples. The FT-IR spectra confirmed no structural changes occurred during thermal treatment. Viscometry was utilized to obtain information on the rheological behaviour of the EPS in aqueous solutions. The Power Law and Cross Equations determined the natural pseudoplastic characteristics of the EPS. Comparatively, results obtained for EPS produced when B. rhodina MAMB-05 was grown on each of the three carbohydrate sources demonstrated similar apparent viscosity values for EPS(GLC) and EPS(SUC), while EPS(FRU) displayed the lowest apparent viscosity of the three botryosphaerans, suggesting a higher degree of ramification and lower Mw. EPS(GLC) and EPSSUC possessed similar degrees of ramification. The slight differences found in their viscosities can be explained by the differences in the type of branching among the three botryosphaerans, thus varying the strength of intermolecular interactions and consequently, consistency and viscosity. The physico-chemical studies of botryosphaerans represent the originality of this work, and the knowledge of these properties is an important criterion for potential applications.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)PROPPG-UELUniv Estadual Paulista, Fac Sci & Technol, Dept Phys Chem & Biol, BR-19060900 Presidente Prudente, BrazilLakehead Univ, Biorefining Res Initiat, Thunder Bay, on P7B 5E1, CanadaUniviversidade Estadual de Londrina (UEL), Dept Biochem & Biotechnol, CCE, BR-86051990 Londrina, BrazilUniv Fed Parana, Dept Biochem & Mol Biol, BR-81531990 Curitiba, Parana, BrazilUniv Estadual Paulista, Fac Sci & Technol, Dept Phys Chem & Biol, BR-19060900 Presidente Prudente, BrazilMdpi AgUniversidade Estadual Paulista (Unesp)Lakehead UnivUniversidade Estadual de Londrina (UEL)Universidade Federal do Paraná (UFPR)Fonseca, Paulo R. M. S. [UNESP]Dekker, Robert F. H.Barbosa, Aneli M.Silveira, Joana L. M.Vasconcelos, Ana F. D. [UNESP]Monteiro, Nilson K. [UNESP]Aranda-Selverio, Gabriel [UNESP]Corradi da Silva, Maria de Lourdes [UNESP]2014-05-20T13:23:09Z2014-05-20T13:23:09Z2011-09-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article7488-7501application/pdfhttp://dx.doi.org/10.3390/molecules16097488Molecules. Basel: Mdpi Ag, v. 16, n. 9, p. 7488-7501, 2011.1420-3049http://hdl.handle.net/11449/694310.3390/molecules16097488WOS:000295211000023WOS000295211000023.pdfWeb of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengMolecules3.0980,855info:eu-repo/semantics/openAccess2023-11-21T06:13:26Zoai:repositorio.unesp.br:11449/6943Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462023-11-21T06:13:26Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Thermal and Rheological Properties of a Family of Botryosphaerans Produced by Botryosphaeria rhodina MAMB-05 |
title |
Thermal and Rheological Properties of a Family of Botryosphaerans Produced by Botryosphaeria rhodina MAMB-05 |
spellingShingle |
Thermal and Rheological Properties of a Family of Botryosphaerans Produced by Botryosphaeria rhodina MAMB-05 Fonseca, Paulo R. M. S. [UNESP] beta-glucans botryosphaeran thermal analysis FT-IR spectroscopy rheology |
title_short |
Thermal and Rheological Properties of a Family of Botryosphaerans Produced by Botryosphaeria rhodina MAMB-05 |
title_full |
Thermal and Rheological Properties of a Family of Botryosphaerans Produced by Botryosphaeria rhodina MAMB-05 |
title_fullStr |
Thermal and Rheological Properties of a Family of Botryosphaerans Produced by Botryosphaeria rhodina MAMB-05 |
title_full_unstemmed |
Thermal and Rheological Properties of a Family of Botryosphaerans Produced by Botryosphaeria rhodina MAMB-05 |
title_sort |
Thermal and Rheological Properties of a Family of Botryosphaerans Produced by Botryosphaeria rhodina MAMB-05 |
author |
Fonseca, Paulo R. M. S. [UNESP] |
author_facet |
Fonseca, Paulo R. M. S. [UNESP] Dekker, Robert F. H. Barbosa, Aneli M. Silveira, Joana L. M. Vasconcelos, Ana F. D. [UNESP] Monteiro, Nilson K. [UNESP] Aranda-Selverio, Gabriel [UNESP] Corradi da Silva, Maria de Lourdes [UNESP] |
author_role |
author |
author2 |
Dekker, Robert F. H. Barbosa, Aneli M. Silveira, Joana L. M. Vasconcelos, Ana F. D. [UNESP] Monteiro, Nilson K. [UNESP] Aranda-Selverio, Gabriel [UNESP] Corradi da Silva, Maria de Lourdes [UNESP] |
author2_role |
author author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Lakehead Univ Universidade Estadual de Londrina (UEL) Universidade Federal do Paraná (UFPR) |
dc.contributor.author.fl_str_mv |
Fonseca, Paulo R. M. S. [UNESP] Dekker, Robert F. H. Barbosa, Aneli M. Silveira, Joana L. M. Vasconcelos, Ana F. D. [UNESP] Monteiro, Nilson K. [UNESP] Aranda-Selverio, Gabriel [UNESP] Corradi da Silva, Maria de Lourdes [UNESP] |
dc.subject.por.fl_str_mv |
beta-glucans botryosphaeran thermal analysis FT-IR spectroscopy rheology |
topic |
beta-glucans botryosphaeran thermal analysis FT-IR spectroscopy rheology |
description |
Differential scanning calorimetry (DSC), thermogravimetry (TG) and Fourier-transform infra-red spectroscopy (FT-IR) analyses were performed to investigate changes in the physico-chemical properties of botryosphaerans, a family of exopolysaccharides (EPS) produced by the fungus Botryosphaeria rhodina MAMB-05 grown on glucose (EPS(GLC)), sucrose (EPS(SUC)) and fructose (EPS(FRU)). A slight endothermic transition and small mass loss attributable to the removal of water of hydration were observed in the DSC and TG analyses, respectively, for the three EPS samples. The FT-IR spectra confirmed no structural changes occurred during thermal treatment. Viscometry was utilized to obtain information on the rheological behaviour of the EPS in aqueous solutions. The Power Law and Cross Equations determined the natural pseudoplastic characteristics of the EPS. Comparatively, results obtained for EPS produced when B. rhodina MAMB-05 was grown on each of the three carbohydrate sources demonstrated similar apparent viscosity values for EPS(GLC) and EPS(SUC), while EPS(FRU) displayed the lowest apparent viscosity of the three botryosphaerans, suggesting a higher degree of ramification and lower Mw. EPS(GLC) and EPSSUC possessed similar degrees of ramification. The slight differences found in their viscosities can be explained by the differences in the type of branching among the three botryosphaerans, thus varying the strength of intermolecular interactions and consequently, consistency and viscosity. The physico-chemical studies of botryosphaerans represent the originality of this work, and the knowledge of these properties is an important criterion for potential applications. |
publishDate |
2011 |
dc.date.none.fl_str_mv |
2011-09-01 2014-05-20T13:23:09Z 2014-05-20T13:23:09Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.3390/molecules16097488 Molecules. Basel: Mdpi Ag, v. 16, n. 9, p. 7488-7501, 2011. 1420-3049 http://hdl.handle.net/11449/6943 10.3390/molecules16097488 WOS:000295211000023 WOS000295211000023.pdf |
url |
http://dx.doi.org/10.3390/molecules16097488 http://hdl.handle.net/11449/6943 |
identifier_str_mv |
Molecules. Basel: Mdpi Ag, v. 16, n. 9, p. 7488-7501, 2011. 1420-3049 10.3390/molecules16097488 WOS:000295211000023 WOS000295211000023.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Molecules 3.098 0,855 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
7488-7501 application/pdf |
dc.publisher.none.fl_str_mv |
Mdpi Ag |
publisher.none.fl_str_mv |
Mdpi Ag |
dc.source.none.fl_str_mv |
Web of Science reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
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1797789776143712256 |