| 摘要 |
<p>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 rheological properties to be made. Novel compositions containing them are also claimed.</p> |
