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Microbial exopolysaccharides: Effect on corrosion and partial chemical characterization

DRS at CSIR-National Institute of Oceanography

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Title Microbial exopolysaccharides: Effect on corrosion and partial chemical characterization
 
Creator Majumdar, I.
DeSouza, F.P.
Bhosle, N.B.
 
Subject Biofilm material
microfouling material
 
Description Test panels of mild steel were deployed in the surface waters of the Dona Paula Bay over a period of 28 days. Biofilm material on mild steel panels was analyzed for biofilm biomass las organic carbon), exopolysaccharide (EPS) production and corrosion rates Concentrations of biofilm carbon and EPS increased whereas corrosion rate of mild steel decreased over the period of immersion. Corrosion of mild steel showed significant inverse relationships with biofilm carbon and EPS. This implies that biofilm organic matter inhibits the corrosion of mild steel A few bacterial cultures isolated from the microfouling material were screened for EPS production One of the cultures identified as Vibro sp. produced the highest amount of exopolysaccharides Production, isolation and characterization of the exopolysaccharides produced by the bacterium were evaluated. Exopolysaccharide was produced in all the phases of grow'th and with all the substrates tested. Production of the exopolysaccharide was influenced by source and concentration of carbon and nitrogen as well as concentration of phosphate in the growth medium. Exopolysaccharide is a heteropolysaccharide- containing glucose as the most abundant monosaccharide and mannose. xylose, galactose and fucose as minor sugars. The presence of uronic acid and pyruvate indicates the acidic nature of the polysaccharide.
 
Date 2006-11-14T06:53:11Z
2006-11-14T06:53:11Z
1999
 
Type Journal Article
 
Identifier J. Indian Inst. Sci., vol.79(6), 539-550p.
http://drs.nio.org/drs/handle/2264/476
 
Language en
 
Format 133781 bytes
application/pdf
 
Publisher Indian Institute of Science