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Thermal stability improvement of blue colorant C-Phycocyanin from Spirulina platensis for food industry applications

Paper ID Volume ID Publish Year Pages File Format Full-Text
34837 45051 2014 6 PDF Available
Title
Thermal stability improvement of blue colorant C-Phycocyanin from Spirulina platensis for food industry applications
Abstract

•High concentration of sugars strongly increase the thermal stability of C-Phycocyanin.•The stabilization effect is related to the final concentration of sugar added rather than the type of sugar.•Fructose, being the most soluble sugars among those tested, resulted to be the best preservative.•Fructose/C-Phycocyanin syrups subjected to standard sterilization procedures showed minimal loss in blue color.

C-Phycocyanin (C-PC) is a blue pigment in cyanobacteria, rhodophytes and cryptophytes with potential use as a value-added food colorant. Its stability was studied by examining the thermal degradation reactions in a range of temperature (25-80 °C) before and after the addition of selected edible preservatives. The natural protein crosslinker methylglyoxal does not stabilize significantly C-PC whereas addition of honey or high concentration of sugars greatly diminish the blue color degradation occurring when C-PC is exposed to high temperature.Data show that the sugar preservative effect on the C-PC blue color is related to the final concentration of sugar added rather than the type of sugar. For this reason the best preservative was found to be fructose, which is the most soluble sugar among those tested, at saturation concentration. Exploratory sterilization studies have been carried out with six blue/green fructose syrups made by mixing C-PC with the natural yellow pigment Carthamus tinctorius. Both after a “low temperature” and a “high temperature” sterilization procedure the syrups remain clear and maintain their bright color with only partial blue color degradation. After the sterilization process, the syrups were monitored for two months, in such observation period the loss of blue color is minimal.

Keywords
C-Phycocyanin; Thermal stability; Mono- and disaccharides; Methylglyoxal; Sterilization; Manuka honey
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Thermal stability improvement of blue colorant C-Phycocyanin from Spirulina platensis for food industry applications
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Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 49, Issue 1, January 2014, Pages 154–159
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