Modified gellan gum composition process for preparation of same and use thereof
First Claim
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1. A process for preparing a gellan gum containing product comprising the steps of:
- (a) providing a native gellan gum having linear tetrasaccharide repeat units of glucose residues having attached acetate and glycerate substituent groups;
(b) treating the native gellan gum with a weak base for a time and at a temperature effective for reducing the total number of acetate and glycerate substituent groups on the repeat units and for removing a greater number of glycerate substituent groups so as to increase the proportion of acetate substituent groups to provide a modified gellan gum having gel-forming properties different from gel-forming properties of the native gellan gum; and
(c) causing the modified gum to gel during preparation of the gellan gum-containing product.
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Abstract
The invention relates to a modified gellan gum in which the total acyl content as well as the ratio of acyl substituent groups to glycerate substituent groups per linear saccharide repeat unit is altered to be higher than 1. The invention further relates to a process for the modification of a gellan gum to alter its acyl content in which the gum is treated with a weak base such as sodium or potassium carbonate or a suitable phosphate. The process enables “tailor made” gums having appropriate setting temperatures and theological properties to be made. Novel compositions containing them are also claimed.
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Citations
8 Claims
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1. A process for preparing a gellan gum containing product comprising the steps of:
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(a) providing a native gellan gum having linear tetrasaccharide repeat units of glucose residues having attached acetate and glycerate substituent groups;
(b) treating the native gellan gum with a weak base for a time and at a temperature effective for reducing the total number of acetate and glycerate substituent groups on the repeat units and for removing a greater number of glycerate substituent groups so as to increase the proportion of acetate substituent groups to provide a modified gellan gum having gel-forming properties different from gel-forming properties of the native gellan gum; and
(c) causing the modified gum to gel during preparation of the gellan gum-containing product. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification