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Physical properties of a single sugar α-linked glucuronic acid-based oligosaccharide produced by a Gluconacetobacter hansenii strain

Paper ID Volume ID Publish Year Pages File Format Full-Text
35964 45116 2007 6 PDF Available
Title
Physical properties of a single sugar α-linked glucuronic acid-based oligosaccharide produced by a Gluconacetobacter hansenii strain
Abstract

To date, the physical properties including the morphology, thermal characteristics, and emulsifying activities of a single sugar α-linked glucuronic acid-based water-soluble oligosaccharides (WSOS) produced by Gluconacetobacter hansenii PJK have not been investigated or published elsewhere. Therefore, the current study was undertaken to investigate these important physical properties of WSOS. Field-emission scanning electron microscopy of the WSOS revealed a porous flake-type structure free from adhered bacterial cells. The degradation of the WSOS occurred by four well-differentiated steps with a maximum weight loss (∼40%) in a range of 230–300 °C. The pyrolysis temperature of the WSOS was found to be 278 °C with an enthalpy of 83.01 J/g. The emulsification ability of the WSOS increased initially with concentration, followed by a decrease, and finally became constant. The optimum concentration of WSOS for maximum emulsification (emulsifying ability) was 0.15% (w/v). The emulsions prepared with WSOS did not exhibit significant stability. The formation of oil and aqueous layers was initiated just after 2 min for emulsion prepared with 0.15% (w/v) WSOS, which completely separated after 24 h. It is concluded that WSOS has thermal stability comparable to other microbial polysaccharides. They have moderate emulsification properties, which may be due to the oligomeric nature of WSOS. Additionally the producer organism of WSOS is non-pathogenic. Therefore, the produced WSOS have potential applications in food and/or pharmaceutical preparations and as therapeutic agent in biomedical fields.

Keywords
Gluconacetobacter hansenii PJK; Water-soluble oligosaccharides; Morphology; Thermal analysis; Emulsifying properties
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Physical properties of a single sugar α-linked glucuronic acid-based oligosaccharide produced by a Gluconacetobacter hansenii strain
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Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 42, Issue 2, February 2007, Pages 252–257
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us