A normal range for blood urea nitrogen is generally 8 to 24 mg/dL for adult men (2.86 to 8.57 mmol/L) and 6 to 21 mg/dL (2.14 to 7.50 mmol/L) for adult women. However, urea nitrogen levels vary by age. Infants have lower levels than other people do.
Fortunately, freezing zucchini and other summer squash is a snap: All you do is cut it into half-inch slices, blanch it in a pot of boiling water for three minutes, transfer it to a bowl of ice water to cool, drain it, and bag it.
How to Blanch Zucchini Squash. by Last Updated: Feb 08, 2014. How to Blanch Zucchini Squash Photo Credit Laine Girard/Demand Media. Whether you are wanting to freeze a surplus of summer squash or simply prepare squash for a super quick stir-fry, blanching is a crucial step to help maintain the texture of the squash when cooking it later.