Effect of cations, pH and sulfate content on the viscosity and emulsifying activity of the Halomonas eurihalina exopolysaccharide

被引：69
作者：
Calvo, C
Martinez-Checa, F
Mota, A
Bejar, V
Quesada, E
机构：
[1] Univ Granada, Fac Pharm, Dept Microbiol, E-18071 Granada, Spain
[2] Univ Granada, Fac Pharm, Water Inst, E-18071 Granada, Spain
来源：
JOURNAL OF INDUSTRIAL MICROBIOLOGY & BIOTECHNOLOGY | 1998年 / 20卷 / 3-4期
关键词：
exopolysaccharide; rheology; emulsifier;
D O I：
10.1038/sj.jim.2900513
中图分类号：
Q81 [生物工程学（生物技术）]; Q93 [微生物学];
学科分类号：
071005 ; 0836 ; 090102 ; 100705 ;
摘要：
The effects of monovalent and divalent cations on the theological behavior of Halomonas eurihalina exopolysaccharide (EPS) were studied. Sodium, potassium, magnesium and calcium were added and the relative abilities to increase viscosity were as follows: KCl > NaCl > MgCl2 > CaCl2. The highest viscosity value was measured in acidic 10(-4) M KCl, in which a gel formed, A loss of sulfate content seemed to correlate with the increase of viscosity. H.eurihalina produced EPS in all growth media, Addition of hydrophobic substrates to culture media produced changes in chemical composition and emulsifying activity of the EPS. Xylene was the most effectively emulsified substance and the EPS produced on tetradecane and on corn oil the most active emulsifier.
引用
收藏
页码：205 / 209
页数：5
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