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Thermal properties of an exopolysaccharide produced by a marine thermotolerant Bacillus licheniformis by ATR-FTIR spectroscopy.
- Source :
-
International Journal of Biological Macromolecules . Feb2020, Vol. 145, p77-83. 7p. - Publication Year :
- 2020
-
Abstract
- The novel exopolysaccharide (EPS-B3-15) produced by the marine thermotolerant Bacillus licheniformis strain B3-15, constituted by mannose and glucose, has been recently reported as a valuable biopolymer in pharmaceutical applications. To dynamically characterize the thermal behavior of the whole EPS-B3-15 system, the Attenuated Total Reflectance Fourier Transform Infra-Red spectroscopy technique was used over a temperature range from ambient to 78.5 °C. The molecular changes of EPS-B3-15 during the heating process were evaluated by the spectral distance (SD) and wavelet cross-correlation (XWT) analysis. The thermal analysis revealed that the EPS-B3-15 possessed high stability until 78.5 °C. As evaluated by SD and XWT, the molecular structure of EPS-B3-15 at 45 °C was partially modified, due to –OH groups and the –COOH and –OH interactions, conferring a new conformational structure to the biopolymer. The thermal characterization provides novel information about the molecular conformations of the whole EPS-B3-15 system at different temperatures. The thermostable EPS-B3-15 can be successfully employed for biotechnological, nanotechnological and material science applications even at high temperatures. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 01418130
- Volume :
- 145
- Database :
- Academic Search Index
- Journal :
- International Journal of Biological Macromolecules
- Publication Type :
- Academic Journal
- Accession number :
- 141785450
- Full Text :
- https://doi.org/10.1016/j.ijbiomac.2019.12.163