Non-Starch Polysaccharides (NSP) Flashcards
(16 cards)
What does NSP stand for?
Non-Starch Polysaccharides
NSPs are also known as dietary fibre.
Where are NSPs primarily found?
In the cell walls of cereals.
What are the two classifications of NSPs?
Water-soluble and water-insoluble NSPs.
Name three examples of water-insoluble NSPs.
- Cellulose
- Galactomannans
- Lignin
Name three examples of water-soluble NSPs.
- Pectins
- Arabinogalactans
- β-(1,3)(1,4)-D-glucans
What is cellulose?
An insoluble glucose polymer made up entirely of glucose residues connected by β-(1,4)-glycosidic bonds.
What does hemicellulose refer to?
Partially soluble polymers of glucose and other sugars.
What are pentosans?
Polymers of pentoses.
What is the significance of β-glucans in malt?
They are a glucose polymer that can affect brewing processes.
What percentage of barley endosperm cell walls is composed of β-glucan?
70-75%.
What are the effects of β-glucans and pentosans in brewing?
- Increase wort viscosity
- Reduce extract efficiency
- Block filters
- Form hazes and precipitates in beer
True or False: β-glucans and pentosans can contribute positively to beer.
True.
What is the typical maximum level of β-glucans in a standard wort produced from malt?
100 mg/L.
What is the primary concern regarding pentosans in mashes containing wheat?
They can become much more significant due to higher levels in wheat.
Fill in the blank: NSPs are thought to contribute to the health of your _______.
intestines.
What is the main disadvantage of NSPs in the brewing process?
They can cause various problems like increasing wort viscosity and blocking filters.
