Polysaccharides - Introduction lecture

5 important questions on Polysaccharides - Introduction lecture

What side groups of starch can be charged?

Phosphate

How is the shape of a molecule (linear/branched) related to the viscosity?

A linear molecule gives a higher viscosity

How does High Performance Size Exclusion Chromatography (HPSEC) work?

The larger molecules are eluted first (they cannot enter pores), then bit smaller molecules and then the smaller molecules. So the molecules eluted last could go through all pores and are the smallest
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What is the source of agar?

Red seaweeds

What happens to carrageenan when heated and pH > 3.5?

Unstable, due to anhydrogalactose building block

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