The Effect of Water Activity and Osmotic Pressure on Microbial Growth

The Effect of Water Activity and Osmotic Pressure on Microbial Growth

Requires Microbe Set

Associate solute concentration, osmotic pressure, tonicity, and water activity in aqueous solutions.
Describe a microbe’s environment in terms of water activity and osmotic pressure.
Manipulate the solute concentration of the microbial environment and assess the effect on growth.

Materials

Materials

2 Nutrient Broth Tubes, 0% NaCl
2 Nutrient Broth Tubes, 5% NaCl
2 Nutrient Broth Tubes, 10% NaCl
2 Nutrient Broth Tubes, 15% NaCl
Requires Microbe Set

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