Polysaccharides from Microorganisms, Plants and Animals

Sutherland, Ian W.

doi:10.1002/3527600035.bpol5001

Cited by 15 publications

(12 citation statements)

References 68 publications

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“…This property is vital for wastewater treatment and soil aggregation (Sutherland 2002). The presence of exopolysaccharide in adherent biofilms on inert and biological surfaces has been recognized for some time.…”

Section: Leuconostoc Mesenteriodesmentioning

confidence: 99%

Bacterial exopolysaccharides – a perception

Kumar

Mody

Jha

2007

J. Basic Microbiol.

484

139

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Microbial polysaccharides are multifunctional and can be divided into intracellular polysaccharides, structural polysaccharides and extracellular polysaccharides or exopolysaccharides (EPS). Extracellular polymeric substances (EPS), produced by both prokaryotes (eubacteria and archaebacteria) and eukaryotes (phytoplankton, fungi, and algae), have been of topical research interest. Newer approaches are carried out today to replace the traditionally used plant gums by their bacterial counterparts. The bacterial exopolysaccharides represent a wide range of chemical structures, but have not yet acquired appreciable significance. Chemically, EPS are rich in high molecular weight polysaccharides (10 to 30 kDa) and have heteropolymeric composition. They have new-fangled applications due to the unique properties they possess. Owing to this, exopolysaccharides have found multifarious applications in the food, pharmaceutical and other industries. Hence, the present article converges on bacterial exopolysaccharides.

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Section: Leuconostoc Mesenteriodesmentioning

confidence: 99%

Bacterial exopolysaccharides – a perception

Kumar

Mody

Jha

2007

J. Basic Microbiol.

484

139

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“…The microbial EPS are generally expensive, with the exception of xanthan, because yields are low even when produced under optimal conditions. Another barrier to their commercialization in the food or pharmaceutical industry is the cost of obtaining regulatory approval [1].…”

Section: Introductionmentioning

confidence: 99%

Optimization of Production and Preliminary Characterization of New Exopolysaccharides from <i>Gluconacetobacter hansenii</i> LMG1524

Valepyn¹,

Berezina²,

Paquot³

2012

AiM

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The influence of different carbon and nitrogen sources, of ethanol concentration, the optimal pH, temperature and medium composition were evaluated on extracellular polysaccharides (EPS) synthesis and bacterial growth of Gluconacetobacter hansenii LMG1524, and preliminary characterization of EPS was investigated. The highest EPS yields were obtained using glycerol and ammonium sulphate as carbon and nitrogen sources, respectively. The increase of ethanol concentration in the medium did not influence the EPS synthesis but reduced the bacterial growth. The optimum temperature and pH for polysaccharides production were respectively 25˚C and 5; whereas for cell growth were respectively 30˚C and 4. The optimal culture medium composition was determined as follows: 10 g/L sucrose, 0.892 g/L (NH 4 ) 2 SO 4 , 0.34 g/L NaNO 3 , 3 mL acetic acid, 1.5 g/L KH 2 PO 4 , 1.5 g/L K 2 HPO 4 and 0.6 g/L MgSO 4 . The polysaccharides produced were of 14 and 10 polymerization degrees (DP) and constituted mainly of glucose, galactose and mannose, in relative percent of 36.36, 33.94 and 22.42, respectively.

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“…20.2). Polysaccharides have useful properties for biologically derived scaffolds such as non-toxicity, water solubility, stability to variations in pH and can be chemically modifi ed to achieve various functions; disadvantages are low mechanical properties, and poor thermal and chemical stability (Sutherland, 1996). Chitosan is osteocompatible and osteoconductive, enhancing bone formation in-vitro and in-vivo (Muzzarelli et al, 1994).…”

Section: Chitosanmentioning

confidence: 99%