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.
This is so easy to do! Just bring the water in your stock pot to a boil and go ahead and prepare your bowl of ice water. Wash your squash thoroughly and then cut into 1/2 inch rounds. If you like to make zucchini bread then you may want to shred it instead of cutting it. If you have a large quantity then you may want to break it up into batches. Put your freshly cut squash into the boiling water for 2-3 minutes.