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.
If the size of your zucchini is small to medium, just wash off the dirt and cut off the ends. If your zucchini is one of those monster zucchinis, then slice the zucchini in half lengthwise and scrape out the big seeds with a spoon. You donât want big seeds or pieces of big seeds in your frozen zucchini. Big seeds stay hard and crunchy.