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Characterization of levan produced by a Paenibacillus sp. isolated from Brazilian crude oil.
Mendonça, Carlos M N; Oliveira, Rodrigo C; Freire, Rominne K B; Piazentin, Anna C M; Pereira, Wellison A; Gudiña, Eduardo J; Evtuguin, Dmitry V; Converti, Attilio; Santos, João H P M; Nunes, Cláudia; Rodrigues, Lígia R; Oliveira, Ricardo P S.
Afiliação
  • Mendonça CMN; Department of Biochemical and Pharmaceutical Technology, University of São Paulo, 05508-000 São Paulo, Brazil; CICECO, Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal.
  • Oliveira RC; Department of Biochemical and Pharmaceutical Technology, University of São Paulo, 05508-000 São Paulo, Brazil.
  • Freire RKB; Department of Biochemical and Pharmaceutical Technology, University of São Paulo, 05508-000 São Paulo, Brazil.
  • Piazentin ACM; Department of Biochemical and Pharmaceutical Technology, University of São Paulo, 05508-000 São Paulo, Brazil.
  • Pereira WA; Department of Biochemical and Pharmaceutical Technology, University of São Paulo, 05508-000 São Paulo, Brazil.
  • Gudiña EJ; CEB, Centre of Biological Engineering, University of Minho, 4710-057 Braga, Portugal.
  • Evtuguin DV; CICECO, Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal.
  • Converti A; Department of Civil, Chemical and Environmental Engineering, Pole of Chemical Engineering, University of Genoa, Via Opera Pia 15, 16145 Genoa, Italy.
  • Santos JHPM; Department of Biochemical and Pharmaceutical Technology, University of São Paulo, 05508-000 São Paulo, Brazil.
  • Nunes C; CICECO, Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal.
  • Rodrigues LR; CEB, Centre of Biological Engineering, University of Minho, 4710-057 Braga, Portugal.
  • Oliveira RPS; Department of Biochemical and Pharmaceutical Technology, University of São Paulo, 05508-000 São Paulo, Brazil. Electronic address: rpsolive@usp.br.
Int J Biol Macromol ; 186: 788-799, 2021 Sep 01.
Article em En | MEDLINE | ID: mdl-34245738
A levan-type fructooligosaccharide was produced by a Paenibacillus strain isolated from Brazilian crude oil, the purity of which was 98.5% after precipitation with ethanol and dialysis. Characterization by FTIR, NMR spectroscopy, GC-FID and ESI-MS revealed that it is a mixture of linear ß(2 â†’ 6) fructosyl polymers with average degree of polymerization (DP) of 18 and branching ratio of 20. Morphological structure and physicochemical properties were investigated to assess levan microstructure, degradation temperature and thermomechanical features. Thermal Gravimetric Analysis highlighted degradation temperature of 218 °C, Differential Scanning Calorimetry (DSC) glass transition at 81.47 °C, and Dynamic Mechanical Analysis three frequency-dependent transition peaks. These peaks, corresponding to a first thermomechanical transition event at 86.60 °C related to the DSC endothermic event, a second at 170.9 °C and a third at 185.2 °C, were attributed to different glass transition temperatures of oligo and polyfructans with different DP. Levan showed high morphological versatility and technological potential for the food, nutraceutical, and pharmaceutical industries.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Petróleo / Paenibacillus / Frutanos País/Região como assunto: America do sul / Brasil Idioma: En Revista: Int J Biol Macromol Ano de publicação: 2021 Tipo de documento: Article País de afiliação: Portugal País de publicação: Holanda
Texto completo
Adicionar na Minha BVS
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XML
PubMed Links
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Petróleo / Paenibacillus / Frutanos País/Região como assunto: America do sul / Brasil Idioma: En Revista: Int J Biol Macromol Ano de publicação: 2021 Tipo de documento: Article País de afiliação: Portugal País de publicação: Holanda