dc.contributor.author | Tako, Masakuni | |
dc.contributor.author | kitajima, Seiko | |
dc.contributor.author | Yogi, Takuya | |
dc.contributor.author | Uechi, Keiko | |
dc.contributor.author | Onaga, Masayuki | |
dc.contributor.author | Tamaki, Yukihiro | |
dc.contributor.author | Uechi, Shuntoku | |
dc.date.accessioned | 2016-07-25T13:24:30Z | |
dc.date.available | 2016-07-25T13:24:30Z | |
dc.date.issued | 2016-05 | |
dc.identifier.uri | http://doi.org/10.4236/abc.2016.63007 | |
dc.identifier.uri | http://hdl.handle.net/123456789/909 | |
dc.description.abstract | The structure-function relationship of a gellan family of polysaccharides, S-198 gum produced by Alcaligenes ATCC31853 was investigated in terms of rheological aspects. The flow curves of S-198 gum showed plastic behavior above 0.3%. Gelation did not occur in S-198 gum solution at low temperature (0℃), even at 0.8%. Both the viscosity and the elastic modulus remained constant with increasing temperature up to 80?C. The elastic modulus decreased a little with the addition of CaCl2 (6.8 mM), but then once again remained constant up to 80℃. The highest elastic modulus was observed for deacylated gellan gum with the addition of CaCl2 and increased slightly with increasing temperature up to 80℃, which was considered to be a transition temperature, after which it decreased rapidly. The elastic modulus of S-198 gum in the presence of urea (4.0 M) was lower than that in aqueous solution at low temperature (0℃), but remained constant with increasing temperature up to 80℃. The intramolecular associations, (hydrogen bonding and van der Waals forces of attraction), of S-198 gum molecules in aqueous solutions were proposed. The gellan family of polysaccharides, S-198, S-88, S-657, rhamsan, welan and gellan gum, provided a good opportunity to investigate the structure-function relationship for polysaccharides. | en_US |
dc.language.iso | en | en_US |
dc.publisher | Scientific Research Publishing | en_US |
dc.relation.ispartofseries | Advances in Biological Chemistry , 2016, 6, 55- 69; | |
dc.subject | S-198 Gum, Alcaligenes ATCC31853, Thermal Stability, Intramolecular Associations, Gellan Family of Polysaccharid | en_US |
dc.title | Structure-Function Relationship of a Gellan Family of Polysaccharide, S-198 Gum, Produced by Alcaligenes ATCC31853 | en_US |
dc.type | Article | en_US |