FSN 125 Lecture Notes - Lecture 4: Gluten, Corn Syrup, Jerusalem Artichoke
9 Nov 2017
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Document Summary
Considered complex carbohydrates because of complexity of their moluecular structures. Polysaccharides of <10 sugar units are called oligosachharides. Polysachharides (>10 sugar units) occur much more frequently than oligosaccharides. Linear (amylose) (only 1 reducing end) and branched (amylopectin) Mother nature packages starch in a granule. Gelatinization definition the disruption of intermolecular bonds, loss of birefringence, irreversible swelling, and loss of crystallinity in the starch granule in the presence of water and heat. Pasting is the phenomenon following gelatinization in the dissolution of starch. It involves granular swelling, exudation of molecular components from the granule, and eventually, total disruption of the granules. Pasting is not separate from starch gelatinization, but it is a continuation of it. Syneresis formed by retrogradation (the squeezing out of water) Retrogradation is a reaction that takes place when the amylose and amylopectin chains in cooked, gelatinized starch realign themselves as the cooked starch cools. It can occur in starch gels as well as bread.
