KOPRI Repository

Physicocehmical and rheological properties of a novel emulsifier, EPS-R, produced by the marine bacterium Hahella chejuensis

Cited 8 time in wos
Cited 11 time in scopus
Metadata Downloads

Full metadata record

DC FieldValueLanguage
dc.contributor.authorYim, Joung Han-
dc.contributor.authorKim, Sung Jin-
dc.contributor.authorAn, Se Hoon-
dc.contributor.authorLee, Hong Kum-
dc.description.abstractThe rheological properties of an exopolysaccharide, EPS-R, produced by the marine bacterium Hahella chejuensis strain 96CJ10356 were investigated. The E24 of 0.5% EPS-R was 89.2%, which was higher than that observed in commercial polysaccharides such as xanthan gum (67.8%), gellan gum (2.01%) or sodium alginate (1.02%). Glucose and galactose are the main sugars in EPS-R, with a molar ratio of ~1:6.8, xylose and ribose are minor sugar components. The average molecular mass, as determined by gel filtration chromatography, was 2.2 x 103 KDa. The intrinsic viscosities of EPS-R were calculated to be 16.5 and 15.9 dl/g using the Huggins and Kraemer equations, respectively, with a 2.3 dl/g overlap. In terms of rigidity, the conformation of EPS-R was similar to that of caboxymethyl cellulose (5.0 x 10-2). The rheological behavior of EPS?R dispersion indicated that the formation of a structure intermediate between that of a random-coil polysaccharide and a weak gel. The aqueous dispersion of EPS-R at concentrations ranging from 0.25% to 1.0% (w/w) showed a marked shear-thinning property in accordance with Power-law behavior. In aqueous dispersions of 1.0% EPS-R, the consistency index (K) and flow behavior index (n) were 1,410 and 0.73, respectively. EPS-R was stable to pH and salts.-
dc.titlePhysicocehmical and rheological properties of a novel emulsifier, EPS-R, produced by the marine bacterium Hahella chejuensis-
dc.title.alternative하헬라 JeJu엔시스가 생산하는 신규 생물유화제 EPS=R의 물리화학적 특성 및 물성-
dc.identifier.bibliographicCitationYim, Joung Han, et al. 2004. "Physicocehmical and rheological properties of a novel emulsifier, EPS-R, produced by the marine bacterium Hahella chejuensis". <em>Biotechnology and Bioprocess Engineering</em>, 9(5): 1.-
dc.citation.titleBiotechnology and Bioprocess Engineering-
dc.description.jcrRateJCR 2002:0-
dc.subject.keywordHahella chejuensis-
dc.subject.keywordmarine bacterium-
dc.subject.keywordrheological properties-
Appears in Collections  
2004-2005, Application and Development of Biopolymer from Marine Microorganisms (04-05) / Lee, Hong Kum
Files in This Item
General Conditions
      ROMEO Green
    Can archive pre-print and post-print or publisher's version/PDF
      ROMEO Blue
    Can archive post-print (ie final draft post-refereeing) or publisher's version/PDF
      ROMEO Yellow
    Can archive pre-print (ie pre-refereeing)
      ROMEO White
    Archiving not formally supported

    Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.