Molar mass and rheological characterisation of an exopolysaccharide from Pediococcus damnosus 2.6
(2007) In Carbohydrate Polymers 68(3). p.577-586- Abstract
- The molar mass and theological properties of an exopolysaccharide (EPS) from Pediococcus damnosus 2.6 were investigated. The molar mass was determined by asymmetrical flow field-flow fractionation coupled with multiangle light scattering and refractive index detection. The EPS was observed to be a flexible chain polymer with a molar mass value of 4 x 10(6) g mol(-1). Heating the sample at 80 degrees C for 10 min caused a shift to lower hydrodynamic radius. The theological behaviour of the EPS was compared to that of a commercial cereal beta-glucan (0.359 x 10(6) g mol(-1)). The maximum storage modulus, G'(max) for EPS solution was lower than that for the cereal beta-glucan at all concentrations, while the relaxation time, t(G'=G") was... (More)
- The molar mass and theological properties of an exopolysaccharide (EPS) from Pediococcus damnosus 2.6 were investigated. The molar mass was determined by asymmetrical flow field-flow fractionation coupled with multiangle light scattering and refractive index detection. The EPS was observed to be a flexible chain polymer with a molar mass value of 4 x 10(6) g mol(-1). Heating the sample at 80 degrees C for 10 min caused a shift to lower hydrodynamic radius. The theological behaviour of the EPS was compared to that of a commercial cereal beta-glucan (0.359 x 10(6) g mol(-1)). The maximum storage modulus, G'(max) for EPS solution was lower than that for the cereal beta-glucan at all concentrations, while the relaxation time, t(G'=G") was higher. The G'(max) was reduced on heating the EPS solution at 80 degrees C for 10 min, likely indicating some conformational changes. Three-dimensional models of the polymers revealed some differences in intramolecular hydrogen bonds. The EPS molecule had a ropy nature in solution and this could make it suitable for usage as a thickener in food systems. (c) 2006 Elsevier Ltd. All rights reserved. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/666070
- author
- Lambo, Adele LU ; Leeman, Mats LU ; Wahlund, Karl-Gustav LU ; Nyman, Margareta LU ; Öste, Rickard LU and Larsson, Helena LU
- organization
- publishing date
- 2007
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Pediococcus damnosus 2.6, exopolysaccharide, molar mass, root mean, square radius, loss modulus, polydispersity, storage modulus
- in
- Carbohydrate Polymers
- volume
- 68
- issue
- 3
- pages
- 577 - 586
- publisher
- Elsevier
- external identifiers
-
- wos:000245779100023
- scopus:33847610229
- ISSN
- 0144-8617
- DOI
- 10.1016/j.carbpol.2006.06.037
- language
- English
- LU publication?
- yes
- additional info
- The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Applied Nutrition and Food Chemistry (011001300), Analytical Chemistry (S/LTH) (011001004), Food Technology (011001017)
- id
- ae5c8cf0-ad14-472c-891f-1ec817942f7b (old id 666070)
- date added to LUP
- 2016-04-01 11:43:24
- date last changed
- 2023-11-10 22:22:02
@article{ae5c8cf0-ad14-472c-891f-1ec817942f7b, abstract = {{The molar mass and theological properties of an exopolysaccharide (EPS) from Pediococcus damnosus 2.6 were investigated. The molar mass was determined by asymmetrical flow field-flow fractionation coupled with multiangle light scattering and refractive index detection. The EPS was observed to be a flexible chain polymer with a molar mass value of 4 x 10(6) g mol(-1). Heating the sample at 80 degrees C for 10 min caused a shift to lower hydrodynamic radius. The theological behaviour of the EPS was compared to that of a commercial cereal beta-glucan (0.359 x 10(6) g mol(-1)). The maximum storage modulus, G'(max) for EPS solution was lower than that for the cereal beta-glucan at all concentrations, while the relaxation time, t(G'=G") was higher. The G'(max) was reduced on heating the EPS solution at 80 degrees C for 10 min, likely indicating some conformational changes. Three-dimensional models of the polymers revealed some differences in intramolecular hydrogen bonds. The EPS molecule had a ropy nature in solution and this could make it suitable for usage as a thickener in food systems. (c) 2006 Elsevier Ltd. All rights reserved.}}, author = {{Lambo, Adele and Leeman, Mats and Wahlund, Karl-Gustav and Nyman, Margareta and Öste, Rickard and Larsson, Helena}}, issn = {{0144-8617}}, keywords = {{Pediococcus damnosus 2.6; exopolysaccharide; molar mass; root mean; square radius; loss modulus; polydispersity; storage modulus}}, language = {{eng}}, number = {{3}}, pages = {{577--586}}, publisher = {{Elsevier}}, series = {{Carbohydrate Polymers}}, title = {{Molar mass and rheological characterisation of an exopolysaccharide from Pediococcus damnosus 2.6}}, url = {{http://dx.doi.org/10.1016/j.carbpol.2006.06.037}}, doi = {{10.1016/j.carbpol.2006.06.037}}, volume = {{68}}, year = {{2007}}, }