Nutrition Flashcards
What are 3 macro elements required for yeast growth?
Carbon
Hydrogen
Oxygen
Nitrogen
Phosphate
Potassium
Sodium
Zinc
Magnesium
What percentage of yeast cell weight is protein?
35-65
What percentage of yeast cell weight are polysaccharides?
20-40
What are some yeast nutrients found in wort?
Carbohydrate (fermentable sugars)
Nitrogen (amino acids)
Inorganic (P, S, Mg)
Vitamins
Oxygen
What is the best course for nitrogen in wort?
Amino acids (FAN or YAN)
How does calcium affect brewing?
Lowers wort ph
Oxalate precipitation
Yeast flocculation
Alpha Amalyse
How does magnesium affect yeast?
Necessary component for glycolysis
Maintains structural integrity of the yeast
How does zinc affect yeast?
stabilizes cell membranes
Facilitates redox coupling (NAD transfer)
Assists with acetaldehyde > ethanol
What is free diffusion?
Ability for elements to freely pass through cell membrane
What is facilitated diffusion?
Ability for elements to pass through membrane via permease
What is ATPase?
Regulates growth and fermentation by excreting acidity from the cell (keeps ph balanced). 30% of beer acidity is from ATPase
Which sugar has the fastest uptake and which diffusion pathway does it take?
Glucose/fructose via facilitated diffusion