1. Define or identify:

• galactomannan
• guaran
• carob gum

2.  Describe a galactomannan.

3.  Describe the natures of the common commercial guar and locust bean gums based on how they are prepared.

4.  Give the idealized repeat unit structure of guaran using both a) Haworth structures and b) shorthand notations.

5.  Describe the two structure differences between guaran and the galactomannan of locust bean gum.

6.  Describe the process and give the rationale for making "synthetic locust bean gum."

7.  Describe the difference in solubilities of guar and locust bean gums.

8.  Give a molecular explanation for the differences in solubility of guar and locust bean gum polysaccharides.

9.  Compare the synergistic interactions of guar and locust bean gums with xanthan.

10. Give the molecular basis for the synergistic interaction of locust bean gum with xanthan and/or carrageenan.

Web Authors: James R. Daniel, Ph. D. and James N. BeMiller, Ph. D.
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