authors |
Mendonca, CMN; Oliveira, RC; Freire, RKB; Piazentin, ACM; Pereira, WA; Gudina, EJ; Evtuguin, DV; Converti, A; Santos, JHPM; Nunes, C; Rodrigues, LR; Oliveira, RPS |
nationality |
International |
journal |
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES |
author keywords |
Levan; Physicochemical characterization; Thermomechanical stability |
keywords |
ANTIINFLAMMATORY ACTIVITY; FRUCTOOLIGOSACCHARIDES; EXOPOLYSACCHARIDE; POLYSACCHARIDES; POLYMERIZATION; WATER; OLIGOSACCHARIDES; OPTIMIZATION; BACTERIUM; FRUCTANS |
abstract |
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 beta(2 -+ 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 degrees C, Differential Scanning Calorimetry (DSC) glass transition at 81.47 degrees C, and Dynamic Mechanical Analysis three frequency-dependent transition peaks. These peaks, corresponding to a first thermomechanical transition event at 86.60 degrees C related to the DSC endothermic event, a second at 170.9 degrees C and a third at 185.2 degrees 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. |
publisher |
ELSEVIER |
issn |
0141-8130 |
isbn |
1879-0003 |
year published |
2021 |
volume |
186 |
beginning page |
788 |
ending page |
799 |
digital object identifier (doi) |
10.1016/j.ijbiomac.2021.07.036 |
web of science category |
12 |
subject category |
Biochemistry & Molecular Biology; Chemistry, Applied; Polymer Science |
unique article identifier |
WOS:000688434300005
|
ciceco authors
impact metrics
journal analysis (jcr 2019):
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journal impact factor |
5.162 |
5 year journal impact factor |
5.137 |
category normalized journal impact factor percentile |
86.689 |
dimensions (citation analysis):
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altmetrics (social interaction):
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